Text

Groundwater Tritium Investigation Report, Dresden Generating Station, Project Number EXENW-18513-400
	ML102420146
Person / Time
Site:	Dresden
Issue date:	12/07/2005
From:	Mackay R; RETEC Group
To:	; Exelon Generation Co, Office of Information Services
References
	FOIA/PA-2010-0209 EXENW-18513-400
	Download: ML102420146 (347)
	v • d • e

Groundwater Tritium Investigation Report Dresden Generating'Station Morris, Illinois Prepared by:

The RETEC Group, Inc.

8605 W. Bryn Mawr Avenue Chicago, Illinois 60631 RETEC Project Number: EXENW-18513-400 Prepared for:

Exelon Generation 6500 North Dresden Road Morris, Illinois 60450 1 ia n t* frecor ws da d iAn December 7, 2005 Privil ed an Confidentia sel Pr ared at lthe of C..se

K) Groundwater Tritium Investigation Report Dresden Generating Station Morris, Illinois Prepared by:

The RETEC Group, Inc.

8605 W. Bryn Mawr Avenue Chicago, Illinois 60631 RETEC Project Number: EXENW-18513-400 Prepared for:

'j Exelon Generation 6500 North Dresden Road Morris, Illinois 60450 Prepared by:

Randal J. MacKa, Se'nior I-ydroge r ist Reviewed by:

David Meiri, Ph.D., CGWP, Vice President December 7, 2005 J projects\Exelon NucIarr\Dresden\Report\DreSden Station FINAL Groundwater Tritium Assessmin Report 120705,do%;

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Table of Contents J

Introduction .................................................................................................... 1-1 1.1 Purpose .............................................................................................. 1-1 1.2 Scope of W ork ................................................................................... 1-1 1.3 Report Organization ........................................................................... 1-1 2 Field Investigation ......................................................................................... 2-1 2.1 Drilling Activities ........................................................................ 2-1 2.1.1 Baby W ells in Protected Area ................................................ 2-1 2.1.2 Downgradient W ell Clusters .................................................. 2-2 2.1.3 Repair of W ell DSP149 ......................................................... 2-3 2.1.4 Well Developm ent .................................................................. 2-4 2.2 Geophysical Logging ......................................................................... 2-4 2.3 Land Surveying ................................................................................. 2-4 2.4 W ater Level M easurem ents ............................................................... 2-5 2.4.1 October 2004 M easurem ents ................................................. 2-5 2.4.2 April 2005 Measurements ........................... 2-5 2.5 Slug Tests ........................................................................................... 2-5 2.6 Groundwater Sam pling ...................................................................... 2-6 2.7 Records Search .................................................................................. 2-6 3 Geology and H ydrology .................................................. .............................. 3-1 3.1 Regional Geology .............................................................................. 3-1 3.2 Site Geology ...................................................................................... 3-2 3.2.1 Topsoil ................................................................................... 3-2 3.2.2 Pottsville Sandstone ............................................................... 3-2 3.2.3 Divine Lim estone ................................................................... 3-2 3.2.4 M aquoketa Shale ................................................................... 3-3 3.2.5 Galena Dolom ite .................................................................... 3-3 3.3 Regional Hydrogeology ................................................................ 3-3 3.4 Site Hydrogeology ............................................................................. 3-3 3.4.1 Hydrogeologic Units .............................................................. 3-4 3.4.2 Groundwater Flow ................................................................. 3-4 3.4.3 Slug Test Evaluation ........................................................ 3-7 3..

3.4.4 Residential W ells .................................................................. 3-7 4 Tritium Results .............................................................................................. 4-1 4.1 Shallow Groundwater Associated with CST System ........................ 4-1 4.2 Storm Sewers ..................................................................................... 4-3 4.2.1 Flow Path of Storm Sew ers ................................................... 4-3 4.2.2 Stormwater Flow and Drainage Areas ................................... 4-3 4.2.3 Potential Groundw ater Ingress .............................................. 4-3 4.3 Site-W ide Shallow Groundwater ...................................................... 4-4 4.4 Surface W ater .................................................................................... 4-6 4.5 Off-Site M igration ............................................................................ 4-6 Privj~iO'ed 7aVCo~nfdentiil1 i P~ifaredat I rcio ýe

Table of Contents 5 Tritium Impacts Evaluation .......................... ...... 5-1 5.1 Regional Background Tritium Levels ......................... 5-1 5.2 Tritium Mass Release Assessment ............................ 5-1 5.2.1 Shallow Groundwater Contribution ....................................... 5-2 5.2.2 Storm Sewer Contribution ..................................................... 5-4 5.2.3 Net Release of Tritium Mass .......................... 5-5 5.3 Rate of Tritium Release .................................................................... 5-6 5.4 Potential Impacts to Groundwater ...................................................... 5-6 5.4.1 Shallow Groundwater ............................................................ 5-6 5.4.2 Residential Wells .................................................................. 5-8 6 Sum m ary ........................................................................................................ 6-1 7 References ................................................................................................. 7-1 Privile d"and CoPidential_ - ii P red at the Dirkte- C e

List of Tables I . . . .. II Table 2-1 Monitoring Well and Surface Water Coordinates and Elevations Table 2-2a Water Level Measurements - October 28, 2004 Table 2-2b Water"Level Measurements - April 4, 2005 Table 3-1 Generalized Geologic Column Table 3-2 Horizontal Hydraulic Gradient Calculations Table 3-3 Vertical Hydraulic Gradient Calculations Table 3-4 Slug Test Results Table 3-5 Residential Well Information Table 4-1 Tritium Concentrations - April 8, 2005 Table 5-1 BIOSCREEN Modeling Site-Specific Input Parameters

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List of Figures N)

Figure 1-I Site Location Map Figure 2-1 Site-Wide Water Sampling Locations Figure 2-2 CST System Water Sampling Locations Figure 3-1 Geologic Cross Section Locations Figure 3-2 Geologic Cross Section A-A' Figure 3-3 Geologic Cross Section B-B' Figure 3-4a Water Table Contour Map - October 28, 2004 Figure 3-4b Water Tab]e Contour Map - April 4, 2005 Figure 3-5 Residential Well Locations Figure 4-1 CST System Water Sampling Locations Figure 4-2 Tritium Concentration vs. Time in W-Series Baby Wells Figure 4-3 Tritium Concentration vs. Time in T-Series Baby Wells Figure 4-4 Tritium Concentration vs. Time in R-Series Baby Wells Figure 4-5 Tritium Concentration vs. Time in E-Series Baby Wells Figure 4-6a Tritium Concentration Map Near CST System - September 3, 2004 Figure 4-6b Tritium Concentration Map Near CST System - April 8, 2005 Figure 4-7 Storm Sewer Layout and Tritium Concentration Map - September 1, 2004 Figure 4-8 Tritium Concentration vs. Time in Storm Sewers Figure 4-9 Site-Wide Water Sampling Locations Figure 4-10 Tritium Concentration vs. Time in Wells DSP124 and DSP125 Figure 4-11 Tritium Concentration vs. Time in Wells DSPI05, DSPI06, DSPI07, DSP108, and DSP123 Figure 4-12 Tritium Concentration vs. Time in Wells DSP122, DSP148, DSP149, DSPI 55, and DSP156 Figure 4-13 a Tritium Concentration Map - September 3, 2004 Figure 4-13b Tritium Concentration Map - April 4, 2005 Figure 4-14 Tritium Concentration vs. Time in Unit 2/3 Intake Canal, Cold Canal, and Unit 2/3 Discharge Canal Figure 4-15 Tritium Concentration vs. Time in Thorsen Well and Cold Canal Figure 5-1 Tritium Plume Figure 5-2 Mass Flux East of Release Area Figure 5-3 Mass Flux West of Release Area

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List of Appendices J Appendix A Soil Boring/Rock Coring Logs and Well Construction Diagrams Appendix B Geophysical Logs Appendix C Site Survey Map Appendix D Slug Test Data Appendix E Well Record Information Appendix F Historic Tritium Concentration Data Appendix G Mass Flux Calculations j

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Executive Summary

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Routine groundwater sampling undertaken at the Dresden Generating Station in July 2004 detected elevated levels of tritium in shallow monitoring wells and storm sewers located near the Unit 2/3 interlock building. The tritium was traced to a release from the Condensate Storage Tank (CST) system, through a pipe that connects to the station high pressure core injection (HPCI) system. The leak was isolated on October 20, 2004, and a replacement section of pipe around the tank was installed the following month. The RETEC Group, Inc. (RETEC) was contracted by Exelon to characterize the nature of groundwater flow at the facility and evaluate the fate of the tritium, to assist Exelon in evaluating regulatory compliance issues and response options.

The scope of work for this project included reviewing historical data, installing additional monitoring wells, conducting geophysical logging in some deeper wells, surveying the locations of all monitoring points, performing two rounds of water level measurements, performing slug tests on selected wells, sampling groundwater for tritium concentrations, and evaluating all of the physical and chemical data to characterize groundwater flow and tritium migration. The field activities were completed in two phases between October 2004 and April 2005.

The geologic units underlying Dresden Station include, in descending order:

topsoil and overburden, the Pottsville (or Spoon) Formation, the Divine Limestone Member (or Ft. Atkinson Limestone), the Maquoketa Shale Member of the Maquoketa Formation, and the Galena Formation (Harza, 1991). The Maquoketa Shale separates the water table aquifer from the lower aquifers. The water table aquifer consists of the Pottsville Sandstone and the Divine Limestone Member, and the lower aquifer consists of Galena Formation. The water table is independent of the piezometric surface of the lower aquifers because the Maquoketa Shale is a sufficiently impermeable confining unit.

Groundwater. flow conditions were characterized using the water level measurements collected on October 28, 2004 and April 4, 2005. There is a mounding- effect in the area of the CST system which extends to the southeast.

The groundwater flow direction in the immediate vicinity of the liquid nitrogen tank is to the east and to the northwest. In the eastern half of the Protected Area (area within the owner-controlled area enclosed by a station security fence in which the main buildings are located), groundwater flows to the north toward the Unit I intake canal. West of the CST system groundwater flows westward toward the cooling canals. South of the Protected Area, groundwater flows to the southeast and southwest with a groundwater divide oriented northwest-southeast. Further south of the Protected Area in the residential area, groundwater flows from the cooling canals eastward to the Kankakee River.

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Executive Summary 2)

The tritium-impacted groundwater is migrating in an easterly direction, as evident from the decrease in tritium concentrations in wells W3 and T6, and an increase in well TI. Tritium also appears to be migrating toward the west, based on the sudden increase in tritium concentrations in well DSP124 located northwest of the CST system. The groundwater impact from the CST system release is confined to a small area, well within the Protected Area.

The total mass of tritium discharged to groundwater flow east of the CST system was calculated as 4.18x1012 pCi, and the total mass of tritium discharged to groundwater flow west of the system was calculated as 1.81x10"1 pCi. Based on a tritium concentration in the CST system of 9 to 10 million pCi/L, the combined mass (discharged to the east and west groundwater flow) equates to approximately 121,000 gallons of tritiated water released to groundwater.

The total mass of tritium discharged to the eastern storm sewer system, which outlets into the Unit I intake canal, was calculated as 5.27x] 012 pCi. The total mass of tritium discharged to the western storm sewer system, which outlets into the Unit 2/3 discharge canal, was calculated as 7 .33 xl0° pCi. Based on an estimated tritium concentration in the CST system of 9 to 10 million pCi/L, this combined mass equates to approximately 148,000 gallons of tritiated water released to the storm sewer.

The combined tritium mass discharged to the groundwater and to the storm sewer from the CST system is calculated as 9.63x1012 pCi. Based on an estimated tritium concentration in the CST system of 9 to 10 million pCi/L, the total mass released equates to approximately 267,000 gallons of tritiated water. The average rate of tritium released to the groundwater and sewer systems, assuming that the total mass of tritium was released over the duration of the discharge from the CST system (i.e., 344 days between November 2003 and October 2004), amounts to 2.80x 10 1 pCi per day.

Based on fate and transport computer modeling (BIOSCREEN), the concentrations of tritium at the source and along the western plume will decrease to below 90 pCi/L within approximately 5 years of the pipe repair.

Similarly, the concentrations at the source and along the eastern plume will drop below 290 pCi/L within approximately 8 years of the repair.

RETEC's investigation revealed that the bulk of the tritium discharged to groundwater from the CST system is flowing toward the east and northwest under the influence of the local hydraulic gradient. The tritium plume is not likely to come under the influence of the regional gradient in the southeasterly direction, and thereby impact residential wells located south of Dresden Station. Tritium sampled in the Thorsen well, which is located approximately 3,400 feet south of the Station, is not believed to be associated with the CST p(Trepared at o n o Counsel

Executive Summary I I I I l I

) system release. Rather, it appears this well influenced by concentrations of tritium in the nearby cooling canals.

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1 Introduction Routine groundwater sampling results undertaken in July 2004 detected elevated levels of tritium in shallow monitoring wells and storm sewers located near the Unit 2/3 interlock building. The tritium was traced to a release from the Condensate Storage Tank (CST) system, through a pipe that connects to the station high pressure core injection (HPCI) system. The leak was isolated on October 20, 2004, and a replacement section of pipe around the tank was installed the following month.

The RETEC Group, Inc. (RETEC) was contracted by Exelon Nuclear (Exelon) to characterize the nature of groundwater flow at the facility and evaluate the fate of the tritium. The facility is located near Morris, Illinois at the comer joining Sections 25, 26, 35, and 36, Township 34 North, Range 8 East, Grundy County, Illinois (see Figure 1-1). This report presents the results of the investigation conducted at Dresden Station by RETEC between October 2004 and April 2005.

1.1 Purpose The purpose of the investigation was to determine the nature of the groundwater flow and tritium concentrations within the area that could be affected by the CST system release and to assist Exelon in evaluating regulatory compliance matters.

1.2 Scope of Work The scope of work for this project included reviewing historical data, installing additional monitoring wells, conducting geophysical logging in some deeper wells, surveying the locations of all monitoring points, performing two rounds of water level measurements, performing slug tests on selected wells, sampling groundwater for tritium concentrations, and evaluating all of the physical and chemical data.

The data obtained in this investigation along with the results of this evaluation are presented this report. The historical data included more than 10 years of groundwater analytical data, residential well records, several rounds of water level measurements, and technical reports. The field activities are described in more detail in Section 2.

1.3 Report Organization This report contains seven sections and seven appendices. Section 1 provides introductory information including purpose and scope of work. Section 2 describes the field activities performed at the site. Section 3 summarizes the regional and site-specific geologic and hydrogeologic environments. Section 4 presents the tritium results from groundwater and surface water samples.

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Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris, Illinois Section 5 addresses the potential tritium impacts and the regulatory framework for tritium. Section 6 summarizes the findings of this investigation. Section 7 lists the sources of information references relied upon to support the preparation of this report.

Appendix A contains soil boring and rock coring logs, and well construction diagrams. Appendix B contains geophysical logs. Appendix C contains the site survey map. Appendix D contains the slug test data. Appendix E contains well record information. Appendix F contains historical tritium concentration data. Appendix G contains the mass flux calculations.

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EXELON GENERATION MORRIS, ILLINOIS SITE LOCATION MAP DRESDEN STATION EXENW-18513-400 IOAW~ LP/l

2 Field Investigation The field activities were completed in two phases between October 2004 and April 2005. The first phase included surveying the locations and elevations of all existing sampling points; measuring water levels from these sampling points; and installing four shallow wells ("baby" wells) to monitor the CST system. The second phase included the installation of nine monitoring wells (three clusters of three wells each) further south of the CST system to monitor groundwater quality in the direction of residential properties, and the repair of existing monitoring well DSP149 due to anomalous data. It also included surveying and water level measurements after the new wells were installed, geophysical logging, slug testing, records search of residential wells, and a round of groundwater sampling. It should be noted that during this project Dresden Station continued its monitoring/sampling program. The sampling results obtained from the program are also presented in this report.

2.1 Drilling Activities The drilling activities for this project included the installation of shallow wells in the Protected Area near the CST system, the installation of three downgradient well clusters south of the Protected Area toward the Kankakee River and the adjacent residential neighborhood, and the repair of existing well DSP149. The locations of the wells are shown in Figures 2-1 and 2-2.

The procedures used to install each of these wells are summarized in the following subsections.

2.1.1 Baby Wells in Protected Area There were 18 shallow, "baby wells" monitoring tritium concentrations in groundwater near the water table prior to the detection of the release. During construction activities to locate and repair the pipe from the CST system, five wells (T3, T4, T7, W1, and W2) were removed. Four new wells (E8, E9, El 0, and W2R) were installed on November 23, 2004 to enhance the network of wells used to monitor any potential release from the CST system. Figure 2-2 shows the location of each baby well included in the CST system monitoring well network.

The new wells were installed by Trench-It, Inc. (Trench-it) of Union, Illinois, and Testing Services Corporation (TSC) of Carol Stream, Illinois. Trench-It performed private utility locating services, and was contracted to ensure each drilling location was clear of all utilities. Due to the shallow water table in the area (4 to 8 feet below ground surface), and the engineering manager's concern for underground utilities, Trench-It's air knife and vacuum truck were used instead of the drill rig to advance each boring. The diameter of each boring varied depending on subsurface conditions affecting the air knife's performance.

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GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris, Illinois TSC personnel constructed each well using 2-inch inside diameter (ID) polyvinyl chloride (PVC) risers with 2 to 5 feet long PVC screens at the bottom. A sand pack was placed around the screen to approximately 2 feet above the screen and a bentonite seal was extended to the ground surface.

The depth of these wells varies from 5.5 to 7.2 feet below ground surface.

The wells were completed as flush-mounts with steel vaults and concrete pads. Well construction diagrams are included in Appendix A.

2.1.2 Downgradient Well Clusters Three well clusters were installed to monitor groundwater quality at the water table, immediately above the lower confining unit of the shallow aquifer, and immediately below this confining unit. Well cluster, DSP157 was located downgradient of the CST system outside of the Protected Area to monitor on-site water quality. Well cluster DSP158 was located southeast of the CST system near the Kankakee River to monitor the potential for impacting the river. Well cluster DSP 159 was located south of the CST system, adjacent to the cooling canals and near the Thorsen well, to monitor the potential for impacting the downgradient residential wells. The locations of these well clusters are shown in Figure 2-1.

At each location, the shallow water table well was designated with a "S", the

) intermediate well immediately above the confining unit was designated with a "M", and the deep well immediately below the confining unit was designated with a "D". The lithology for all of the wells, except for DSPI591), were logged by observing the drill cuttings exiting the borehole as drilling advanced. Well DSP 159D was logged by collecting and observing rock cores from the top of competent rock to bottom. The lithology was described using the Unified Soil Classification System (USCS) and the Field Guide for Rock Core Logging and Fracture. Significant features, such as moisture and soil or rock composition, were noted on the logs. Soil color was referenced using the Munsell Soil Color Chart, and rock color was referenced using the Geologic Society of America Rock-Color Chart. The soil boring and rock coring logs, and well construction diagrams are included in Appendix A.

The shallow wells (DSP157S, DSP158S, and DSP159S) were installed using 4-!/ inch ID hollow stem augers to drill through the topsoil and the sandstone, where present. The wells were drilled to depths varying from 13 to 16 feet below ground surface so that the top of the 10-foot screen would be set approximately 3 feet above the water table. The wells were constructed of 2-inch ID PVC risers with 10-foot lengths of 0.010-inch slotted screens. Sand filter pack was placed in the annular space around the screen, with 0.5 to I foot of sand below the well and I to 2 feet above the top of the screen. A 2-foot thick bentonite seal was placed above the filter pack. The shallow wells

) were completed as stick-up wells with 4-inch diameter steel protective casings set i*n 2-by 2-feet concrete pads, Privile and nfidential 2-2 raredat the D tn

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris, Illinois Drilling ID hollow of the stemintermediate and deep wells augers, respectively, startedwithin to refusal by using the 6-1/4 and 8-1/4Ainch limestone. tri-cone rotary bit was initially used to drill through the limestone, but due to very slow drilling rates, the tri-cone rotary bit was replaced by an air hammer.

The air hammer was used to drill through the shale and the dolomite in the deep wells. The intermediate wells (DSPl57M, DSP158M, and DSP159M) continued drilling with a 6-inch diameter air hammer into the upper I to 2 feet of the shale, at depths ranging from 51 to 59 feet below ground surface.

The deep wells continued drilling with a 8-inch diameter air hammer into the upper 2 feet of the shale and installing 6-inch diameter steel casings. The casing was grouted in place, and allowed to set for approximately 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months prior to drilling through the shale and into the dolomite. Wells DSPI 57D and DSPI 58D were drilled using a 6-inch diameter air hammer to total depths of 130.5 and 135 feet below ground surface, respectively. Well DSP159D was drilled using NXWL wireline rock coring equipment with NQ-sized casing to a total depth of 139 feet below ground surface. Rock cores were collected in 5-foot long wooden boxes with four columns per box. Following coring, the borehole was reamed using a 6-inch diameter air hammer.

The intermediate and deep wells were constructed of 2-inch ID PVC risers with 10-foot lengths of 0.010-inch slotted screens. Sand filter pack was placed in the annular space around the screen, with approximately 1 foot of sand below the well and 2 feet of sand above the top of the screen. A 2-foot thick bentonite seal was placed on top of the filter pack, and the seal was allowed to hydrate before the remainder of the annular space was filled with grout. The intermediate and deep wells were completed as stick-up wells with 4-inch diameter steel protective casings set in 2- by 2-feet concrete pads.

2.1.3 Repair of Well DSP149 Since December 1996, well DSP149 has yielded anomalous water level measurements and tritium concentration values when compared to surrounding monitoring wells. The average depth to water in nearby wells is approximately 12 feet, but the depth to water in well DSPI49 typically has been greater than 40 feet below ground surface. The average tritium concentration in well DSPI55 has been 880 picocuries per liter (pCi/L) since August 1997. The average concentration in well DSP 156 has been 230 pCi/L since February 2002. Both of these wells are located within 60 to 90 feet from well DSP149. The tritium concentration in well DSP149 varied from 404 to 76,488 pCi/L from August 1995 through February 2005. Due to the anomalous results from well DSP149, it was determined that well DSP149 was not yielding representative data, and, should be removed and replaced.

The location of this well is shown in Figure 2-1.

Well DSP149 was overdrilled using an air rotary rig with a 6-inch diameter tri-cone roller bit, The protective casing and concrete pad were removed prior v A2-3 epared at N ir~ectvivon o ýe

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris,Illinois to overdrilling. The monitoring well was overdrilled to a total depth of 51 feet below ground surface, which is approximately 2 feet deeper than the original boring. A new well was constructed of 2-inch ID PVC riser with a 10-foot length of 0.010-inch slotted screen. Sand filter pack was placed around the annular space of the screen, with approximately '1 foot of sand below the well and 2 feet of sand above the top of the screen. A 2-foot thick bentonite seal was placed on top of the filter pack, and the seal was allowed to hydrate before the remainder of the borehole was filled with grout. The well was completed as a stick-up well with a 4-inch steel protective casing set in a 2- by 2-foot concrete pad. The soil boring log and well construction diagram are included in Appendix A.

2.1.4 Well Development Following the installation of the monitoring wells, TSC developed the new monitoring wells using a modified hand pump, a whale pump, or a bailer. The purpose of the well development is to remove silts and other fine-grained sediments from within the well and surrounding formation. The shallow and intermediate wells were developed until clear water was sustained, except for well DSP157S and DSP159S (well went dry). Approximately six well volumes were purged from the shallow and intermediate wells. The deep wells were developed by adding water, surging the water, and then purging them dry due to dry conditions in these wells.

2.2 Geophysical Logging Natural gamma ray and electromagnetic (EM) induction logging were performed on five selected wells (DSP157D, DSP158D, DSP159M, DSP159D, and DSP149), by Century Geophysical Corporation (CGC) of Tulsa, Oklahoma on March 16, 2005. The natural gamma ray logs show lithologic changes and show zones with significant clay content. The EM induction logs were used in correlation with the gamma ray logs to identify water bearing zones. CGC logged the wells using a logging tool. The logging tool was lowered to the bottom of each well and then lifted through the borehole while recording the geophysical measurements. EM induction was not effective through the steel casing of each deep well; however, natural gamma ray measurements of the lithology were recorded through the casing.

The geophysical logs are included in Appendix B.

2.3 Land Surveying Atwell-Hicks, Inc. of Naperville, Illinois was contracted to perform a land survey to generate a facility map showing the locations of all wells, storm sewers, and major features of the power plant. An initial survey was performed during the period of October 21, 2004 through October 28, 2004.

The surveyors provided northing and easting coordinates for all locations. For the monitoring wells, elevations were recorded for the ground surface, top of Privileg 9dential - 2-4 P red at the DiTe

GroundwaterTritium InvestigationReport - Dresden GeneratingStation,Morris, Illinois the riser, and top of the protective casing. For the surface water locations, the surveyors cut a permanent mark into a concrete surface on a bridge or platform and measured the elevations from those marks. Elevations for the storm sewers were measured from the tops of the grates or the edges of the manhole covers. An additional survey was performed on April 4 and 5, 2005 to include the newly installed wells and additional locations not included in the first survey. Table 2-I provides a list of all sampling locations and includes their coordinates .and measured elevations. A site survey map is included in Appendix C.

2.4 Water Level Measurements Two rounds of water levels were measured to characterize groundwater flow directions beneath the site. Water levels were measured from all accessible monitoring wells, storm sewers, and surface water measuring points. An electronic water level indicator was used, and measurements were recorded to the nearest 0.01 feet. The first round was performed in October 28, 2004 prior to installing any additional wells. New security fences were being installed at the time of the first round of measurements, and these new fences made some of the measuring points inaccessible during the second round of measurements. The second round was performed in April 4, 2005 after the

)* four baby wells inside the Protected Area and the three well clusters south of the Protected Area were installed and well DSP 149 was repaired.

2.4.1 October 2004 Measurements The first round of water level measurements was collected on October 28, 2004 (Table 2-2a). The baby wells located near the CST system were not accessible due to construction; therefore, measurements could not be obtained from the T- and W-series wells, and storm sewers L and M.

2.4.2 April 2005 Measurements The second round of water level measurements was collected on April 4, 2005 (Table 2-2b). The new wells were included in this round of measurements.

Baby wells T3, T7, WI, and W2 were removed during pipe repair activities; however, well W2R was installed to replace water level measurements near wells W1 and W2. Storm sewer M was also removed during these construction activities.

2.5 Slug Tests Slug tests were performed on 10 selected monitoring wells (DSP]57S, DSPI57M, DSP158S, DSPI58M, DSPI58D, DSP159S, DSP159M, DSP1579D, DSPI49, and DSP12I) to calculate the hydraulic conductivity of the upper (water table) and the lower aquifers. The shallow wells were used to calculate the hydraulic conductivity in the upper portion of the water table aquifer, and the intermediate wells were used to calculate the hydraulic Pr~ar~gedandthsnfidentia l 2-5 rueparedat the o~re'rtunsel

GroundwaterTritium InvestigationReport - Dresden GeneratingStation, Morris,Illinois conductivity in the lower portion of the water table aquifer. Slug tests performed in the shallow and intermediate wells used a 5-foot long solid slug to displace water. A 30-psi pressure transducer was placed more than 5 feet below the water level in order to record drawdown changes during the test.

To perform slug tests in the deep wells, 20 gallons of water was added to each well due to the limited amount of water in the wells. Drawdown was measured using an electronic water level indicator. Due to the slow recovery, measurements began at 15-second or 30-second intervals, and then increased to 1- and 5-minute intervals after 10 and 20 minutes, respectively. The data from the test were entered in the AQTESOLV for Windows Pro software (HydroSolve, Inc., 2000) to calculate hydraulic conductivity. The slug test data are included in Appendix D.

2.6 Groundwater Sampling A complete round of water sampling was performed on April 8, 2005.

RETEC personnel sampled the newly installed well clusters. Dresden personnel sampled the storm sewers and the monitoring wells in the Protected Area, and their sampling contractor sampled the monitoring wells outside the Protected Area. A total of 54 water samples were collected (including five duplicates). The storm sewers were sampled using a Teflon dipper. All the monitoring wells, with the exception of the deep wells, were sampled using disposable bailers to prevent cross contamination. The deep wells were essentially dry and did not have sufficient groundwater to collect samples.

Prior to sampling, each well was purged of three well casing volumes using a bailer or a pump. Also the depth to the water was measured. Each groundwater sample consisted of two 1-liter bottles, one for tritium analysis and the other for general chemistry parameters (pH, conductivity, and alkalinity). Dresden Chemistry performed the general chemistry analyses, and the tritium samples were shipped to Environmental, Inc. Midwest Laboratory of Northbrook, Illinois for analysis.

2.7 Records Search Local water well and boring logs, dating from the early 1900's through the 1980's, were provided upon request from the Illinois State Geologic Survey (ISGS) to help characterize the hydrogeologic conditions in the vicinity of the facility. These logs were used to identify the thickness of the upper aquifer, and the depth and thickness of the underlying shale. The well records provided by the ISGS included well depths and construction details; however, the locations of these wells were only identified by township and range information and the property owner at the time of installation. This Ja information could not be used to determine the exact location of the wells, and later correlation of some of the residential wells demonstrated a discrepancy Privii and Anfidential - 2-6 P/epared at the D ction of Cou

Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris, Illinois

) of over 1,000 feet from the locations shown from the ISGS data. The well records obtained from ISGS are included in Appendix E.

Exelon provided a list of current property owners in the neighborhood immediately south of the facility and parcel numbers to RETEC. A records search was conducted at the Grundy County Recorder's Office in an attempt to match current property owners with the ISGS well records. RETEC researched property transaction records to match them to the owners recorded on the water well permits. Computerized deed transactions were available only as far back as the late 1970's, and records that needed to be researched to earlier dates had to be traced back in the original handwritten ledgers available in the recorder's office.

While several current owners could be traced back to the well records, there were several problems encountered during the research. Property transactions that were deeded to a bank or a trust effectively terminated a direct chronological link since RETEC would then have to look at all property transactions from that institution making the continuation of the records search not reasonably ascertainable. Another problem encountered was that the deeded property owner might not have signed the signatures on the original well permits, thus making a correlation of records impossible.

3)

Privile and Codential 2-7 PrýKairedat the Dir ofC

Table 2-1 Monitoring Well and Surface Water Coordinates and Elevations Ground Top of Top of Monitoring Well Northing Easting Elevation Casing Riser DSP 105 7339.707 15268.305 518.168 no casing 518.44 DSP 106 7339.737 15303.307 518.084 519.18 518.44 DSP 107 7425.977 15342.866 517.897 no casing 519.53 DSP 108 7561.455 15381.440 518.031 no casing 519.49 DSP 109 7770.582 15266.831 517.560 no casing 519.67 DSP 111 7836.277 14043.038 517.861 521.10 no data DSP 112 7454.142 14219.935 518.906 no data 520.78 DSP 113 7355.322 14418.407 517.859 no casing 519.77 DSP 114 7105.869 15250.611 517.633 no casing 520.651 DSP 115 7783.899 14449.189 517.398 no data no data DSP 117 8062.722 15748.715 51 5.298 no casing 517.52 DSP 118 6960.175 15753.894 517.877 nocasing 519.83 DSP 119 5982.750 15171.819 516.334 517.72 no access DSP 121 8141.345 15419.812 514.614 516.85 516.83 DSP 122 7842.833 14571.519 517.426 519.75 519.67 DSP 123 7781.231 15269.666 517.668 520.21 520.13 DSP 124 7355,317 14428.677 517.739 519.86 519.81 DSP 125 7238.157 14854.885 517.375 519.77 519.76 DSP 126 6289.295 14166.867 523.058 525.01 524.9 DSP 127 7639.812 13694.819 517.623 519.89 519.88 DSP 147 9538.585 14643.606 521.554 523.62 523.37 DSP 148 8631.198 14778.135 518.955 520.89 520.78 DSP 149 8166.382 14621.111 516.453 518.30 518.29 DSP 150 7461.168 15922.676 516.118 518.34 518.31 DSP 151 7256,027 15532.480 517.092 519.57 519.17 DSP 152 6296.437 15641.066 517.061 519.39 519.26

)3 DSP 153 DSP 154 DSP 155 5490.517 5352.598 8133.084 14817.316 15245.062 14564.167 516.552 512.837 516.129 518.86 514.88 518.60 518.57 514.70 518.53 DSP 156 8223.932 14695.823 515.834 518.18 518.14 DSP 157D 6420.976 14714.438 518.461 521.86 521.86 DSP 157M 6421.615 14721.743 518.470 521.79 521.8 DSP 157S 6421.842 14728.713 518.590 521.73 521.54 DSP 158D 5448.080 15934.917 507.792 511.19 510,39 DSP 158M 5442.413 15939,075 507.979 510.97 510.64 DSP 158S 5438.737 15942.476 507.738 511.01 510.78 DSP 159D 3978.341 14863.778 516.320 519.97 519.27 DSP 159M 3969.144 14863.648 516.238 519.81 519.37 DSP 159S 3962.101 14862.976 516270 519.77 519.41 T2 7265.506 14689.031 517.530 520.85 520.56 T 1 7273.506 14689.031 517.240 520.61 520.29 T5 7278,006 14677.531 517.130 520.65 520.29 T6 7278.006 14670.531 517.420 520.68 520.56 E 10 7261.946 14753.240 517.344 no casing 517.22 E2 7273.788 14738.369 517,046 520.55 520.25 E6 7291.771 14795.896 516.939 no casino 516.65 E7 7301.287 14793.751 517.171 no casing 516.81 E8 7274.629 14730,574 516,904 no casing 516.81 E9 7256.267 14735.055 517.264 no casing 517.21 E3 7245.993 14754.697 517.458 no casing 519.54 R 1 7277.985 14714.599 516,789 520.32 519.9 R2 7274.156 14714.169 516.940 520.5 519.99 R3 7265.623 14717.198 517,421 520,73 520.36 W2R 7226.534 14637.312 517.332 no casing 517.16 J) W 3 7228.217 14648.748 517.409 520.13 519.85 Table 2-1 MonWellCoor&Elev Page I of 2

Table 2-1 Monitoring Well and Surface Water Coordinates and Elevations Surface Water Northing Easting Ground, J Measurement Location CBA CB B o

7500,670 7363.559 g

15422.648 15425.039 Elevation 516.750 516.825 CB C 7317.819 15375.345 516.199 CB D 7210.213 15086.098 515.773 CB E 7257.928 14985.036 516.408 CB G 7330.433 14890.100 516.980 CB J 7278.506 14723.531 516.394 CB K 7240.607 14734.688 517.067 CB N 7261.731 14549.464 516.893 CB P 7255.849 14568.238 516.780 CB Q 7220.625 14522.415 516.827 CB R 7256.608 14451.677 517.034 CB S 7263.811 14432.220 516.845 CB T 7264.234 14316,368 517.465 CB U 7382.908 14314.564 516.673 CB V 7620.415 14313.798 516.562 CB W 7733.868 14361.126 516.877 CB Y 7692.476 15051.164 517.657 CB Z 7315.560 14442.520 '517.269 CB AA 7825.062 14190.974 516.841 CB BB 7853.232 14434.341 516.388 CB CC 7783.396 14534.069 516.309 CB DD 7695.045 15024.670 526.748 GB EE 7720.220 15710.953 515.400 CB GG 7501.708 15467.403 515.975 CB HH 7370.787 15637,733 517.671 CB JJ 7280.590 14853.794 516.600 N)

DSP 131 7937.693 14414.922 517.069 DSP 132 7669.615 15425.033 517.201 DSP 134 7329.633 14809.944 517.911 DSP 135 7278.580 14762.030 516.810 DSP 137 7854.242 14097.530 517.667 DSP 140 7282.195 14801,931 516.652 Bridge over West (Cold)

Canal 7791.953 13850.680 517.350 Bridge over East (Hot)

Canal 7791.917 13945.098 517.480 Drainage Pipe @ Creek 6872.837 15746.144 513.780 Kankakee River @ Unit 1 Intake 6973.990 16981.370 508.940 Telemetry Brdge 9355.698 14954.088 514.930 Unit 2/3 Bridge over Recyling Canal 8004.466 15153.016 518.670 Bridge over Discharge Canal for Unit 1 8732.375 15370.150 513.310 Discharge Canal @ Des Plaines River 10199.892, 15356.457 510.680 N. Dresden Road Bridge over South (Cold) Canal 816.827 14925.874 515.790 N. Dresden Road Bridge over North (Hot) Canal 1036.947 14928.786 515.830 Nj Table 2-1 MonWelUCoor&Elav Pqnp ') ýf

-vrabl~e 2.2a 'WN-'te Levjel 'MeasufteneI - Wkober 2B, 2004 Ground Depth to Top of Riser Groundwater D;

)epth to Height of Riser Sample Surface E3ottom*

Water* Elevation Elevation Stick-Up Location Elevation (ft) (ft nsl) (ft msl) (ft) (ft)

(ft msIl DSP 105 10.32 518.44 518.17 508,12 51.68 0.27 DSP 106 9.59 518.44 518.08 508.85 50.91 0.36 DSP 107 13.42 519.53 517.90 506.11 51.95 1.63 DSP 08 12.81 519.49 518.03 506.68 51.90 1.46 DSP 109 20.02 519.67 517.56 499.65 42.96 2.11 DSP 110 14.52 NM NM NM 42.81 NM DSP 111 26.62 521.10 517.86 494.48 54.79 3.24 DSP 112 11.36 520.78 518.91 509.42 40.60 1.87 DSP 113 26.34 519.77 517.86 493.43 43.45 1.91 DSP 114 10.6 520.65 517.63 510.05 44.60 3.02 DSP 115 > 100 517.40 517.40 <416.4 > 100 0.00 DSP 116 NA - - - -

DSP 117 11.99 517.52 515.30 505.53 51.79 2.22 DSP 118 NM 519.83 517.88 NM NM 1,95 DSP 119 NA - 516.33 --

DSP 121 11.74 516.83 514.61 505.09 52.20 2.22 DSP 122 11.34 519.67 517.43 508.33 37.14 2.24 DSP 123 14.85 520.13 517.67 505.28 52.56 2.46 DSP 124 7.17 519.81 517.74 512.64 37.19 2.07 DSP 125 7.08 519.76 517.38 512.68 37.47 2.38 DSP 126 16.92 524.90 523.06 507.98 55.66 1.84 DSP 127 NA 519.88 517.62 - - -

DSP 147 31.64 523.37 521.55 491.73 52.00 1.82 DSP 148 14.11 520.78 518.96 506.67 51.48 1.82 DSP 149 48.51 516.46 516.45 467.95 50.75 0.01 DSP 150 10.81 518.31 516.12 507.50 51.27 2.19 DSP 151 '8.04 519.17 517.09 511.13 51.69 2.08 DSP 152 7.19 519.26 517.06 512.07 52.44 2.20 DSP 153 11.28 518.57 516.55 507.29 52.38 2,02 DSP 154 7.94 514.70 512.84 506.76 52.25 1.86 DSP 155 12.79 518.53 516.13 505.74 41.95 2.40 DSP 156 12,80 518.14 515.83 505,34 52.57 2.31 E2 6.77 520.25 517.05 513.48 6.77 3.20 E3 7.72 519.54 517,46 511.82 8.38 2.08 E5 NA - - - -

E6 4.87 516.65 516.94 511.78 6.59 -0.29 E.7 5.03 516.81 517,17 511.78 6.48 -0.36 R1 8.80 520.32 516.90 511.52 9.58 3.42 R2 8.88 520.50 517.26 511.62 10.07 3.24 R3 6.83 520,73 517.34 513.90 6.83 3.39 T 1 NM 520.61 517.24 - NM ...... _-

T2 NM 520.85 517.53 - NM T3 NA - . - . ... - '

' T 5 NM 520.65 517.13 - NM T6 NM 520.68 517.42 - NM --

T7 NA -...

W 1 NA .......

W2 NA -......

W 3 NM 519.85 517.41 " NM......_NM -

Measured from top of riser

'4A Not accessible 4M Not measured

,ble 2-2 WL Measurerntni Table OcI04 and AprO5/2-2A - October 2004 Pai- I -, -

Table 2-2a Water Level Measurements - October 28, 2004 7~ Soamile Location DettW (ft)

Measuring Point Elevation (ft ins))

Surface Water Elevation (ft msl)

Depth to Bottom (ft)

DSP 131 6.81 517.07 510.26, 6.81 DSP 132 10.06 517.67 507.61 10.80 DSP 134 7.20 517.91 510.71 7.20 DSP 137 5.07 517.67 512.60 5.41 DSP 140 4.64 516.65 512.01 ,4.64 Sewer A 9.27 516.75 507.48 S."

Sewer B 9.38 516.83 507.45 9.82 Sewer C 7.92 516.20 508.28 8.65 Sewer D 6.66 515.77 509.11 6.66 Sewer E 5.68 516.41 510.73 5.68 Sewer F 6.72 516.88 510.16 6,72 Sewer G 7.41 516.98 509.57 7.41 Sewer H 4.95 516.89 511.94 4.95 Sewer J 3.35 516.39 513.04 3.35 Sewer K 2.39 517.07 514.68 3.19 Sewer L NA 516.81 - -

Sewer M NA - - -

Sewer N 2.76 516.89 514.13 2.76 Sewer P 1.82 516.78 514.96 3.92 Sewer Q 2.74 516.83 514.09 3.7 Sewer R 2.95 517.03 514.08 4.19 Sewer S 4.37 516.85 512.48 4.49 Sewer T 5.25 517.47 512.22 5.31

) Sewer U SewerV SewerW 4.24 5.38 5.83 .

516.67 516.56 516.88 512.43 511.18 511.05 4.45 5.38 5,83 Sewer X 3.34 517.01 513.67 3.87 Sewer Y 12.52 517.66 505.14 18.48 Sewer Z 4.65 517.27 512.62 4.81 Sewer AA 2.45 516.84 514.39 2.45 Sewer BB 2.97 516.39 513.42 3.03 Sewer CC 5.02 516.31 511.29 5.02 Sewer DD 8.75 526.75 518.00 8.78 Sewer EE NM 515.40 - -

Sewer FF 12.14 516.30 504.16 58.71 SewerG' 7.81 515.98 508.17 7.81 Sewer HH 28.57 517.67 489.10 28.75 Sewer JJ 4.97 516.60 511.63 4.97 SewerKK NM 517,23 -- -

NA Not accessible NM = Not measured I

-)

Table 2-2 WL Measurement Table Oct04 and AprO5/2-2A - October 2004 Page 2 of 3

Table 2-2a Water Level Measurements - October 28, 2004

) Sample Location (ft)

Measuring Depth to Water Point Elevation (ft msI)

Surface Water Elevation (ft msl)

Depth to Bottom (ft)

Bridge over West (Cold) Canal NM 517.35 -

Bridge over East (Hot) Canal NM 517.48 - -

Dranage Pipe @ Creek 2.62 513.78 511.16 2.86 Kankakee River @ Unit 1 Intake 3.85 508.94 505.09 NM Telemetry Bridge 9.95 514.93 504.98 19.65 Unit 2/3 Bridge over Recycling Canal NM 518.67 - -

Bridge over Discharge Canal for Unit 1 8.43 513.31 504.88 15.55 Discharge Canal @ Des Plaines River NM 510.68 - -

N. Dresden Road Bridge over South (Cold) Canal 8.35 515.79 507.44 NM N. Dresden Road Bridge over ... ... 03...

,North (Hot) Canal 10.8 515.83 505.03 NM NA Not accessible NM Not measured

)

Table 2-2 WL Measurement Table Oct04 and AprO5/2-2A - October 2004 Page 3 of 3

Table 2-2b Water Level Measurements - April 4, 2005 Depth to Top of Riser Ground Groundwater Sample Der' Elevation Surface Elevtion Depth to Height of Riser Location Wft) Ee(ft msio Elevation (ft msl) Bottom* (ft) Stick-Up (ft)

(ft msl _

DSP 105 9.96 518.44 518.17 508.48 51,68 0.27 DSP 106 9.21 518.44 518.08 .50923 50.91 0,36 DSP 107 13.08 519.53 517.90 506.45 51.95 1.63 DSP 108 12.58 519.49 518.03 506.91- 51.90 1.46 DSP 109 14.12 519.67 517.56 505.55 42.96 2.11 DSP 1I1 NM - - - 42.81 -

DSP 111 25.63 521.10 517.86 495.47 54.79 3.24 DSP 112 9.31 520.78 518.91 511.47 40.60 1.87 DSP 113 24.54 519.77 517.86 495.23 43.45 1.91 DSP 114 9.97 520.65 517.63 510.68 44.60 3.02 DSP-115 > 100 517.40 517.40 < 416.4 > 100 0.00 DSP 116 NA - - . - - -

DSP 117 11.04 517.52 515.30 506.48 51.79 2.22 DSP 118 7.50 519.83 517.88 NM NM 1.95 DSP 119 NA - 516.33 - - -

DSP 121 11.07 516.83 514.61 505.76 52,20 2.22 DSP 122 10.35 519.67 517.43 509.32 37.14 2.24 DSP 123 .14.58 520.13 517.67 505.55 52.56 2.46 DSP 124 5,95 519.81 517.74 513.86 37.19 ,2.07 DSP 125 6.17 519.76 517.38 513.59 37.47 2.38 DSP 126 13.99 524.90 523.06 510.91 55.66 1.84 DSP 127 9.90 519.88 517.62 509.98 NM 2.26 J DSP 147 DSP 148 DSP 149 42.91 11.96 12.64 523.37 520.78 518.29 521.55 518.96 516.45 480.46 508.82 505.65 52.00 51.48 .

50.75 1.82 1.82 1.84 DSP 150 10.22 518.31 516.12 508.09 51.27 2.19 DSP 151 7.11 519.17 517.09 612.06 51.69 2.08 DSP 152 5.61 519.26 517.06 513.65 52.44 2.20 DSP 153 8.98 518.57 516.55 509.59 52.38 2.02 DSP 154 7.00 514.70 512.84 507.70 52.25 1.86 DSP 155 NA 518.53 516.13 - 41.95 2.40 DSP 156 12.64 518.14 515.83 505.50 52.57 2.31 DSP 157S 10.13 521.54 518.59 511.41 15.5 2.95 DSP 157M 10.28 521.80 518.47 511,52 50.3 3.33 DSP 157D Dry 521.86 518.46 - 135.0 3.40 DSP 158S 4.96 510.78 507.74 505.82 15.2 3.04 DSP 158M 5.55 510,64 507.98 505.09 58.9 2.66 DSP 158D 137.93 510.39 507.79 372.46 138.5 2.60 DSP 159S 10.13 519A41 516.27 509.28 18.4 3.14 DSP 159M 10.28 519.37 5`16.24 509.09 61,5 3.13 DSP 159D 139.35 519.27 516.32 379.92 140.5 2.95 E2 6.41 520.25 517.05 513.84 6.77 3.20 E3 5.73 519.54 517.46 513.81 &38 2.08 E 5 NA - ...

E6 3.36 516.65 516.94 513.29 6.59 -0.29 E7 3.55 516.81 517.17 513.26 6.48 -0.36 E 8 2.88 516.81 516.90 513.93 5.5 -0.09 J E9 E 10 3.21 3.50 517.21 517.22 517.26 517.34 514.00 513.72 7.0 7.2

-0.05

-0.12

Measured from top of riser NA Not accessible NM Not measured Table 2-2 WL Measuremeni Table Oct04 and h'prO5/2 April 2005

Table 2-2b Water Level Measurements - April 4, 2005 Depth tW Top of Riser Ground Groundwater Sample Dept Elevation Surface Depth to Height of Riser Location (fter Locaion(ft)(ftmsl Elevato rElevation (ffmsl ,,(ftmsl)Eet Bottom* (ft) Stick-Up (ft)

R 1 5.92 520.32 516.90 514.40 9.58 3.42 R2 5.99 520.50 517.26 514.51 10.07 3.24 R3 6.36 520.73 517.34 514.37 6.83 3.39 T 1 6.28 520.61 517.24 514.33 NM 3.37 T2 6.21 520.85 517.53 514.64 NM 3.32 T3 NA . ..

T5 6.37 520.65 517.13 514.28 NM 3.52 T6 6.67 520.68 517.42 514.01 NM 3.26 T7 NA -- --.- -

WI NA - - - -

W 2R 3.08 517.16 517.33 514.08 6.5 -0.17 W 3 6.00 519.85 517.41 513.85 NM 2.44

Measured from top of riser NA Not accessible NM = Not measured Table 2-2 WL Measurement Table OcI04 and AprO512-2B - April 2005

Table 2-2b Water Level Measurements - April 4, 2005 J Sample Location (ft)

Measuring Depth to Water Point Elevation (ft msl)

Surface Water Elevation (ft msl)

Depth to Bottom (ft)

OSP 131 6.12 517.07 510.95 6.81 DSP 132 9.98 517.67 507.69 10,80 DSP 134 7.21 517.91 510.70 7.20 DSP 137 4.86 517.67 512.81 5.41 DSP 140 4.68 516.65 511.97 4.64 Sewer A 9.24 516.75 507.51 9.94 Sewer B 9.34 516.83 507.49 9.82 Sewer C 8.98 516.20 507.22 8.65 Sewer D 6.60 515.77 509.17 6.66 Sewer E 6.70 516.41 509.71 5.68 Sewer F 7.00 516.88 509.88 6.72 SewerG 7.48 516.98 509.50 7.41 Sewer H 5.91 516.89 510.98 4.95 Sewer J 3.38 516.39 513.01 3.35 Sewer K 1.82 517.07 515.25 3.19 SewerL 3.67 516.81 513.14 -

Sewer N 2.69 516.89 514.20 2.76 Sewer P 1.89 516.78 514.89 3.92 Sewer Q 2.74 516.83 514.09 3.7 Sewer R 2.75 517.03 514.28 4.19 Sewer S 4.36 516.85 512.49 4.49 SewerT 5.26 517.47 512.21 5.31 Sewer U 4.24 516.67 512.43 4.45 Sewer V 5.41 516.56 511.15 5.38 Sewer W 6.48 516.88 510.40 5.83 Sewer X 3.37 517.01 513.64 3.87 Sewer Y 12.39 517.66 505.27 18.48 Sewer Z 4.67 517.27 512.60 4.81 Sewer AA 2.15 516.84 514.69 2.45 Sewer BB 5.44 516.39 510.95 3.03 Sewer CC 4.68 516.31 511.63 5.02 Sewer DD 8.64 526.75 518.11 8.78 Sewer'EE 6.05 515.40 - NM Sewer FF 11.78 516.30 504.52 58.71 Sewer GG 7.88 515.98 508.10 7.81 Sewer HH 29.01 517.67 488.66 28.75 Sewer JJ 4.80 516.60 511,80 4.97 NA = Not accessible NM = Not measured 1,

Table 2-2 WL Measurement Table Oct04 and Apr(512-2B - April 2005

Table 2-2b Water Level Measurements - April 4, 2005

) Sample Location Depth to Water Measuring Deth Point Elevation (ft msl)

Surface Water Elevation (ft msl)

Depth to Bottom (ft)

Bridge over West (Cold) Canal 6.75 517.35 510.60 NM Bridge over East (Hot) Canal 10.55 517.48 506.93 NM Dranage Pipe @ Creek 2.6 513.78 511.18 2.86 Kankakee River @ Unit I Intake 3.7 508.94 505.24 NM Telemetry Bridge 9.5 514.93 505.43 19.65 Unit 2/3 Bridge over Recycling Canal 13.35 518.67 505.32 NM Bridge over Discharge Canal for Unit 1 7.96 513.31 505.35 15.55 Discharge Canal @ Des Plaines River 5.35 510.68 505.33 NM N. Dresden Road Bridge over South (Cold) Canal (a) 4.65 515.79 511.14 NM N. Dresden Road Bindge over North (Hot) Canal (a) 8.85 515.83 506.98 NM NA = Not accessible NM Not measured (a) The depths to water for April 4, 2005 resulted in anomalous data that yielded northerly flow for both canals; however, based on the April 8, 2005 depths to water of 4.42 ft in the Cold Channel and 8.43 ft in the Hot Channel, RETEC assumed the April 4, 2005 measurement in the Hot Channel of 5.85 ft was misread and should be 8.85 ft.

X The differences in surface water elevations still shows a northerly flow of the Hot Channel; however, there may be sufficient inherent error in measuring the depth to water due to waves and ripples from a bridge that a southerly

.)

Table 2-2 WL Measurement Table Oct04 and Apr0512 April 2005

C~:t~if I ~ 'Y~s AY1 6 /Ausl Ard pc.'tIYwwIhAC 4, -, 2& A st2-f (I1~ dwCw Cftr1 .44sr Aboe )gyhf~ A::4Lb iwý 'U ""ý jýý.

ii

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-Pl I 8854011 WE~TQ8585J<

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(1851CL 8S

+/- ~J' 8=40 D%557 4-05*452

LEGEND

" 152 EDGE OF WATER

...F E NCE STORM SEWER DASHED WHERE INFERRED POLE - POST CULVERT

". . SWAMP EE TOR...

X ELEVATION MARKER

+ MONITORING WELL CATCH BASIN SURFACE WATER

+ SAMPLING LOCATION SAMPLE ID SURFACE WATER BODY DSP18 Dl INTAKE DSP19 Dl DISCHARGE DSP20 D2/3 DISCHARGE DSP50 D2/3 INTAKE D52 DES PLAINES RIVER DSP34A COLD CANAL DSP34B HOT CANAL 100 0 200

..... . ... SCALE IN FEET SOURCE:ATWELL-HICKS,DWCi 400626WS01. 11/05/2004

.- 0310 003280 OlU1 CAMALFOR UwIW A~l P

+ 06330 N 1/2

'7 LIII (032 132)

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II DSP 159 D i/Ii * *

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.' , ':. .* 500 0 . 1 0 GENERATION I SITE-WIDE WATER SAMPLING LOCATIONS IS, ILLINOIS W-1851 3-400 DRESDEN STATION iS/PGH ,, FGR2-

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UN WELLO

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/ + FOROEYQMGO4

"-'I + WIL (APPROAE~Lk1 LOCAI1O)

N) 20 0 40 i INSET SCALE

3 Geology and Hydrology The stratigraphic terms used in this report are consistent with the terms used in the soil boring and well construction logs provided by the ISGS, and the Dresden Groundwater Study by Harza (1991), which were the primary sources of geologic information for this investigation. These documents refer to the Pennsylvanian sandstone encountered at shallow depths as the Pottsville Sandstone, and the underlying limestone is called the Divine Limestone Member of the Maquoketa Formation. These terms are not consistent with the Summary of the Geology of the Chicago Area - Circular 460 by Wilnman (1971). According to Willman (1971), the Pennsylvanian sandstone is typically assigned to the Spoon Formation, and the underlying limestone is the Fort Atkinson Limestone of the Maquoketa Group.

3.1 Regional Geology The geologic layers of interest underlying Dresden Station include, in descending order: topsoil and overburden, the Pottsville Formation, the Divine Limestone Member of the Maquoketa Formation, the Maquoketa Shale Member of the Maquoketa Formation, and the Galena Formation (Harza, 1991). The topsoil and overburden consists of'sands and sandy clays, and ranges in thickness from 0 to 30 feet. Due to irregular erosion of the Maquoketa Formation, there are outcrops of limestone north of the facility in areas where the Pottsville Formation and topsoil are absent.

The Pottsville Formation is predominantly sandstone exhibiting prominent cross bedding, as is shown in the outcrops along the intake and discharge canals. The sandstone also contains thin seams of carbonaceous material and calcium carbonate cement. The amount of cementation varies horizontally and vertically. The sandstone is absent north of the facility, and in some areas west and southeast of the facility. According to Harza (1991), the Pottsville Sandstone varies from 0 to 50 feet thick, and is underlain by the Divine Limestone. The surface between the Pottsville Sandstone and Divine Limestone is an unconformity.

The Divine Limestone was deposited conformably on the underlying Maquoketa Shale. The contact between these two units is transitional in some areas, with alternating layers of calcareous clays and limestone. The Divine Limestone contains occasional 'stylolites, solution channels, joints, cavities, and thin layers of clay. The thickness of the Divine Limestone varies from 0 to 60 feet, and the elevation of the limestone surface also varies considerably (Harza, 1991).

The Maquoketa Shale consists of dark gray to dark green dolomitic shale with layers of shale and argillaceous dolomite. The regional thickness of the shale consistently ranges bet 65 and 70 feet; however, the elevation of the PriveUQ an -nidentoaln 3-1 PýOared at the D2io.- ounsel

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris, Illinois shale surface varies significantly. Both the Divine Limestone and the Maquoketa Shale have a regional dip to the southeast of approximately 25 feet per mile. The shale is underlain by the Galena Dolomite, which is approximately 230 feet thick.

3.2 Site Geology The geology at the site was characterized using ISGS well records and soil boring logs completed during construction of Dresden Station, previous investigation report by Harza (1995), and drilling activities performed as part of the this hydrogeologic assessment. The geologic units characterized in this section include the topsoil, the Pottsville Formation, the Divine Limestone Member, the Maquoketa Shale, and the Galena Dolomite. The site stratigraphy is depicted on two geologic cross sections. The locations of the geologic cross sections are shown in Figure 3-1. The geologic cross sections that were prepared for this report are presented in Figures 3-2 and 3-3.

3.2.1 Topsoil The topsoil consists of highly organic dark brown to black sandy clay with some gravel. Where present, the topsoil typically ranges between 0 and 5 feet thick across the facility. Fill material consisting of gravel and sand replaces the topsoil within the Protected Area due to construction of the facility. Also, there is 12 feet of fill material along the east bank of the "hot" cooling canal near well cluster DSP159, which is excavated material from the construction of the cooling towers. The fill material near well cluster DSP159 consists of sandy clay and limestone.

3.2.2 Pottsville Sandstone The Pottsville Formation encountered during drilling and characterized from existing logs is hard, pale brown to gray, medium- to coarse-grained sandstone. Construction plans for the facility show the sandstone exists beneath the entire power plant, and the sandstone is also present south of the plant at well cluster DSP157. The thickness of the sandstone near the facility ranges from 25 to 30 feet. The Pottsville Sandstone was not encountered during drilling at well clusters DSP158 or DSP159.

3.2.3 Divine Limestone The Divine Limestone is a white to gray crystalline limestone with pale green lenses of shale encountered near the top of the Maquoketa Shale. Air rotary drilling through the limestone was veryslow, with a drilling rate as low as 3 feet per hour, indicating a very dense limestone. Drilling through the limestone using the air hammer at well clusters DSP158 and DSPI 59 yielded very little water until the drill bit approached the lower 5 feet of the limestone.

The thickness of the Divine Limestone Member ranges from 25 to 50 feet across the site.

Privilege44dCkfidential 3-2 Prep4 ar the Dic' nPtounsef

GroundwaterTritium InvestigationReport - Dresden GeneratingStation, Morris, Illinois 3.2.4 Maquoketa Shale The Maquoketa Shale underlying the Divine Limestone is a hard and very dark greenish gray shale that consists of layers of shale and argillaceous dolomite. The depth to the top of the shale from borings encountered on site range from 48 to 83 feet. The thickness of the shale obtained from the three deep wells (DSP157D, DSP158D, and DSP159D) installed into the Galena Dolomite, and the deep geotechnical soil boring advanced during construction of Dresden Station ranged from 64 to 68 feet.

3.2.5 Galena Dolomite The Galena Dolomite is a light brownish gray to pinkish white crystalline dolomite. Sub-horizontal and vertical fractures were observed in the rock cores for deep well DSPI59D from 132 to 138 feet below ground surface.

3.3 Regional Hydrogeology The Maquoketa Shale separates the water table aquifer from the two lower aquifers. The water table aquifer consists of the Pottsville Sandstone and the Divine Limestone Member of the Maquoketa Formation. The water table is independent of the piezometric surface of the lower aquifers because the Maquoketa Shale is a sufficiently. impermeable confining unit. The lower aquifers are the Ancell Aquifer within the Ordovician System and the Ironton-Galesville Aquifer within the Cambrian System (Table 3-1). These two aquifers have a common piezometric surface because there is no confining unit between them.

The lower aquifers are recharged from surface water to the west and north of Dresden Station, where the Maquoketa Shale is discontinuous in some areas.

Vertical migration downward from the water table aquifer is impeded where the shale is present due to its low permeability. According to Harza (1991),

the piezometric surface for the lower aquifers is approximately 250 feet below ground surface in the vicinity of Dresden Station due to over-pumping in the area.

3.4 Site Hydrogeology The site hydrogeology was characterized using previous investigation reports, well records and soil boring logs provided by ISGS, observations during drilling the newly installed wells, and slug test results. Also several rounds of water level measurements collected over several years, and tritium concentrations measured from monitoring wells, storm sewers and surface water bodies were used to evaluate on-site groundwater flow conditions and off-site movement of groundwater.

Privile

ýnDi-etin Prep ed at the Directi-o-n of Counsel

Groundwater Tritium InvestigationReport - Dresden GeneratingStation, Morris, Illinois 3.4.1 Hydrogeologic Units The water table aquifer consists of the saturated overburden, the Pottsville Sandstone, and the Divine Limestone. This aquifer is monitored by several shallow monitoring wells screened across the water table, and 35- and 50-foot deep wells screened in the limestone. The Maquoketa Shale is the lower confining unit to the water table aquifer. The lower aquifer consists of the Galena Dolomite. It appears that the upper portion of the Galena dolomite is unsaturated as indicated by the dry conditions in the deep wells. The dry deep wells demonstrated the lack of hydraulic interconnection between the water table aquifer and the lower aquifer, and confirmed the occurrence of substantial drawdown of the piezometric, surface in the lower aquifer.

3.4.2 Groundwater Flow Groundwater flow conditions were characterized using the water level measurements collected on October 28, 2004 and April 4, 2005. Figures 3-4a and 3-4b present the water table contour maps of October 28, 2004 and April 4, 2005, respectively, constructed from the monitoring wells installed in the water table aquifer. Both figures show a similar groundwater flow pattern in the water table aquifer.

According to Figures 3-4a and 3-4b, there is a mounding effect in the area of the CST system which extends to the southeast. The groundwater flow direction in the immediate vicinity of the liquid nitrogen tank is to the east and to the northwest. In the eastern half of the Protected Area, groundwater flows to the north toward the Unit I intake canal. West of the CST system, groundwater flows westward toward the cooling, canals. South of the Protected Area, groundwater flows to the southeast and southwest with a groundwater divide oriented northwest-southeast from well DSP124 to DSP152. Further south of the Protected Area in the residential area, groundwater flows from the cooling canals eastward to the Kankakee River.

Horizontal Gradients The water table across most of the Protected Area slopes to the north and northeast toward the Unit I and Unit 2/3 intake canals. The horizontal hydraulic gradient values in the vicinity of the CST system calculated from the water table contour maps were 0.022 and 0.014 ft/fl to the northeast on October 28, 2004 and April 4, 2005, respectively. Table 3-2 presents horizontal hydraulic gradient calculations within the Protected Area in the vicinity of the CST system and to the west of the CST system, and also presents calculations outside of the Protected Area to the east, southeast, and south. The average horizontal hydraulic gradient outside of the Protected Area ranges from 0.0046 ft/ft toward the southwest to 0.035 ft/ft toward the northeast.

Privilegeda o dential _3-4 Preparg*"tthe Dir founsel

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris,Illinois Normal Flow Conditions The water table contour maps presented in Figures 3-4a and 3-4b show a consistent pattern of radial flow within the facility boundary with a groundwater divide in line with wells DSP124 and DSP152. Although water level elevations differ across the site by I to 2 ft between the October 28, 2004 and April 4, 2005 water level measurements, the similar patterns indicate both these maps represent normal groundwater flow conditions.

Influence of the Release Water levels were not measured in the baby wells located in the vicinity of the CST system prior to October 28, 2004. During the October 28, 2004 water level gauging event, only the E- and R-series of baby wells were accessible due to construction activities associated with repairing the pipe from which a release occurred. Baby wells E9, E9, El 0, and W2R were not installed until November 2004; therefore, the water levels on at these locations could not be measured during this event.

The April 4, 2005 water table contour map shows that the highest groundwater elevations exist in the vicinity of the W-, T-, and R-series of baby wells (Figure 3-4b). Although the W- and T-series of wells were not accessible during the October 28, 2004 gauging event, Figure 3-4a shows that the highest groundwater elevations were measured in the E- and R-series of wells monitoring the CST system. These higher groundwater elevations suggest the release may have influenced the water table. However, due to the porous nature of the fill material and underlying sandstone, this effect is most likely localized.

Influence of Facility Construction The ground surface elevation at Dresden Station is approximately 517 feet above mean sea level (msl), and the average water table elevation is approximately 510 feet msl. Construction drawings for Dresden Station show that excavations to construct the Unit 2/3 turbine building are typically deeper than 500 feet msl and are as deep as 463 feet msl. Portions of the building are constructed directly on top of the Maquoketa Shale; therefore, groundwater flow in the water table aquifer is affected throughout its entire thickness around the facility. The hydraulic gradient shows groundwater flows toward the building with preferential lateral flow around the building to the east and west. This also can create a groundwater mounding effect around the building.

Following the installation of a new section of pipe to bypass the release area, the holes excavated east and west of the Unit 2/3 interlock building were backfilled with 20 percent strength grout to within approximately I foot of the ground surface. The remainder of the holes was backfilled with excavated materials, and a thennal berm was constructed over the new pipe to provide weather protection. The grouted material created local zones of lower Privi d onfiden* 3-5 gred at the on of Counsel

Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris,Illinois hydraulic conductivity which will cause the groundwater to flow around these areas.

Influence of Surface Water Bodies Dresden Station is surrounded by surface water bodies, as shown in Figure 1-1, which have a significant effect on groundwater flow. The facility is bordered by the Kankakee River to the east, the Des Plaines River to the north, and the hot and cold cooling canals to the west and south. The Kankakee River, the Des Plaines River, and the cooling canals act as boundary conditions and in fact control the groundwater flow. The Kankakee River supplies the Unit 1 and Unit 2/f intake canals that flow along the northeastern edge of the Protected Area. Two discharge canals are located north of the Protected Area, as is the recycling canal. A residential neighborhood is also encircled by the cooling canals and the Kankakee River.

The normal pool elevation for the Kankakee and Des Plaines Rivers, which join to form the Illinois River, is 505 feet msl. The pool elevation is controlled by the Dresden Island Lock and Dam, located approximately 3,000 feet northwest of Dresden Station. This also controls the surface water elevations in the Unit I and Unit 2/3 intake canals and the Unit 1 discharge canal. The Unit I intake and discharge canals are basically stagnant water bodies since the Unit I reactor is not operating. Groundwater from Dresden Station flows toward the Kankakee and Des Plaines Rivers as shown in Figures 3-4a and 3-4b.

Water from the Unit 2/3 discharge flows south along the western edge of Dresden Station in the "hot canal", then turns to the southeast and is pumped at a lift station into Dresden Cooling Lake. Water is returned by gravity drainage in the "cold canal", located west of the hot canal. Both canals are unlined flumes cut into the bedrock. The hot canal is approximately 12 feet deep, and the bottom of the flume is at a lower elevation than the cold canal and the groundwater at Dresden Station. Both Figures 3-4a and 3-4b demonstrate that groundwater from Dresden Station flows toward the hot canal in the immediate vicinity of the plant.

The surface water elevation in the cold canal is higher than in the hot canal, and it is also higher than the groundwater elevation in the vicinity of the well cluster DSP159 and the Thorsen well. These data demonstrate that the cold canal is a source of recharge for the groundwater south of the plant.

Vertical Gradients Vertical hydraulic gradients were calculated using the April 4, 2005 water level data from the shallow and intermediate wells located at the new well clusters (DSPI57, DSP158, and DSPI59). The vertical gradient calculated at well DSP157, which is closest to the Protected Area, was 0.0032 ft/fl with an upward component. The vertical gradients calculated at wells DSP158 and Privilegeda ifidential 3-6 Prepar at the Direcrzon o Counsel

Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris, Illinois DSP159 were 0.017 and 0.0044 ft/ft, respectively, with downward components. The vertical gradient at well DSPI58 located near the Kankakee River was greater than the gradient for well DSP159 located between the Thorsen well and the hot canal. Table 3-3 summarizes the vertical hydraulic gradient calculations for the three well clusters.

3.4.3 Slug Test Evaluation The slug test data were evaluated using the AQTESOLV for Windows Pro software (HydroSolve, Inc., 2000). For this data set, the software employed the Bouwer and Rice test method for unconfined aquifers (Bouwer and Rice, 1976). The geometric mean of hydraulic conductivity values calculated for the shallow wells (DSP157S, DSP158S, and DSP159S) were two orders of magnitude greater than the geometric mean for the intermediate wells (DSP157M, DSP158M, and DSP159M) installed just above the shale. The geometric mean of hydraulic conductivity for the shallow wells is 2.4x1 0-2 fl/min (34.2 ft/day), which is characteristic of unconsolidated sands or porous sandstone (Freeze and Cherry, 1979). The geometric mean of hydraulic conductivity for the intermediate wells is 4.7xl 0.4 ft/min (0.67 ft/day). Table 3-4 summarizes the slug test results for the shallow and intermediate wells.

The slug test data analysis is included in Appendix D.

The slug tests in the deep wells could only be qualitatively analyzed because they were performed predominantly in unsaturated zones of the Galena Dolomite. For well DSP158D, the initial displacement was 58.5 feet, and there was only 50 percent recovery after 60 minutes. For well DSP159D, the initial displacement was 38 feet, and there was only 64 percent recovery after 60 minutes. Both test results could not adequately be analyzed but indicate a relatively low hydraulic conductivity.

3.4.4 Residential Wells A records search was performed to correlate residential water wells to the ISGS well records. Six well records were correlated to residential properties located south of Dresden Station. None of these records corresponded to the Thorsen well (D23) located at 6310 Dresden Road. Harza (1991) referred to the Thorsen well as 110 feet deep; however, no well record was included in that report and none of the records provided by the ISGS corresponded to that depth. The two nearest records located near 6310 Dresden Road indicate a depth of 110 feet would be in the bottom of the shale or in the underlying dolonmite. The well records also did not correspond to 8167 Thorsen Lane, where low tritium concentrations were detected. The approximate locations of the residential wells are shown in Figure 3-5.

The residential wells were typically cased to 40 feet below ground surface and completed at depths of 200 feet or more. The well identified by ISGS Record

2072, located at 8115 East Blanchard Circle, was installed to 101 feet below Privilege onfidential .. 3-7 Prepat thelrecnon o nsel

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris, Illinois ground surface, and the well record did not identify the depth or thickness of the shale in this boring. Therefore, it is unknown from which formation this well pumps water. Another well, ISGS Record #22798, had a casing set at 58 feet below ground surface. Since all of the wells, except ISGS Record #22798, had casings set at 40 feet below ground surface and the depth to shale was consistently 60 feet below ground surface, these wells are partially pumping water from the upper aquifer as water flows down the open hole beneath the casing outside of the pump. Also the well identified by ISGS Record #22798 receives some water from the upper aquifer since the casing is set 2 feet above the top of the shale. Well construction and property identification information is presented in Table 3-5. A property map of the Thorsen Subdivision is included in Appendix E, along with the ISGS well records that were matched to residential properties.

N)

J Privilegeý nfidential 3-8 Prepa at the DKctiono a sel

Table 3-1 Generalized Geologic Column (after Harza, 1991)

~ms~

Predominant Thickness System Formation Rock Type (feet)

Pottsville Variable Pennsylvanian (or Spoon Formation) (a) Sandstone (0 - 50)

Maquoketa Divine Limestone Member Variable (or Ft. Atkinson Limestone) (a) Limestone (0 - 50)

Maquoketa Shale Member (or Scales Shale) Dolomitic Shale 65 Ordovician Galena Dolomite 230 Platteville Dolomite and Limestone 115 Glenwood (b) Sandstone 5- 30 St. Peter (b) Sandstone 165 Shakopee Dolomite 70 - 90 New Richmond Sandstone and Dolomite 45 - 55 Oneta Dolomite 210 Trempeleau Dolomite 200 Cambrian Franconia Sandstone 130 Ironton _c) Sandstone 120 Galesville (c) Sandstone > 55 Notes:

(a) - Water Table Aquifier (b) - Ancell Aquifier (c) - lronton - Galesville Aquifier Table 3-1 Generalized Geologic CoJumn Page 1 of I

y Table 3M2 Horizontal Hydraulic Gradient Calculatons October 28,2Z004 ..... . .. Ap-ril 4,2005 -

...Hrzontal on -Horiznta-Gradient Gradient IAverage dh (ft) di~t rt (tt). Drto(ft) lf) f/l Directo f/l j~aby Wells - j -5.Z*- - 0.7 ""2- 0,014 no~h-noeast 10.014-Baby _Wells .. 0,5 17 0.029 northwest 0.029 ViMinr of the CST System to the East 2 90 0,022 notheast 1 73 .0-014 northeast - .0.1 1 North of the Turbine Buildin 3 101 0,030 northeast 5 124 0,040 northeast 0,035 West of the CST System 4 255 0.016 west 2 233 0.0086 west 0.012 East of the Protected Area 5 590 0.0085 eastknortheast 4 525 0,0076 east-northeast 0.OOBO Southeast of the Protected Area 5 500 0.010 southeast 6 570 0.011 southeast 0.010

ýSouth of the Protected Area - _4 6BO 0,0059 " southwest, " 2 " 0 ,03 suhet 0.046 Iable 3-2HodzonWa Gradient Calculatons Pg Ioof1 Page

Table 3-3 Vertical Hydraulic Gradient Calculations April 4,2005*

.. .. shallow Well Intermediate Well Groundwater Eev ~bon a croe ionnwtr Eeai*o cen .. .

Elevation Midpoint Elevation Midpoint Vertical Gradient/ Direction Well Cluster (ft msl) (ft msl) (ft mal) ift, msl) (f0lft) (Up IOown)

DSP157S / DSPI57M 511,41 511,04 511.52 476,50 0.0032 Up DSP15BS / DSP15aM 505,B2 500.58 5K5,0J 456.74 0.0157 Down QSP19S/ DSPI59M -50928 506.01 509.09 .42.87 .0.0044 Iabig3-3Verical Gradieni Cakuiatim PDD9 i ofI

Table 3-4 Slug Test Results I Qxal Saturated Penetration Screen Initial Hydraulic Hydraulic Slug Test Type Thickness Depth Length Drawdown Conductivity Conductivity Well (Rising IFalling) (ft) (ft) (it) (it) (itlmln) (fitday)

IJSP121 Fallin 40,75 40.75 10 1,663 2,02E-04 0,29 DSP149R Failing 49 49 10 1,998 4.59E-04 0266 Rising 49 49 10 2.109 3.77E-04 4054 SP5S .R.ising 47.15 9,7 J 10 I ,1 3-58 13,29E-02" 47.38 DSP1 57M Falling 1 44,52 1 41.49 1 10 1,776 1I,8E-03 2.63 gFt1 58S .... Rising 52,91 9,08 '10 2,98 1,45E.02 "20.85 DSP158M .Falling 53 53 10- 1.969 8.50E.05 0,12 OS159S- Risingg 50,66 7.62 10 1,923 2,81 E-02 40,48 DSP 1g59M_. Risin 49 49 10 1,659 1,93E-03 2*78 Note: Geometric Mean: Shallow 2.37E-02 34.20 All wells are 2.inch diameter wells Intermediate 4,68E.04 0.67 Gravel pack porosity was assumed to be 20%,

tatle A4 Slug Test R~esults Page 1of1

Table 3-5 Residential Well Information

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I I I 290 I I I IV

-240 280 250 270 -260 260 L 33500 2 9 5 0 8300 7000 8400 I

7700 11400 2100 '0 22800 4200 4900 5600 7700

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- INFERRED 508.82 GROUNDWATER ELEVATION (FEET AMSL) 495.97- ANOMALOUS DATA POINT NA NOT ACCESSIBLE NOTE:

1. ELEVATION AT DSP-127 NOT USED IN CONTOUR DUE TO LACK OF DATA WEST OF CANALS, WHICH CREATE BOUNDARY CONDITIONS.

100 0 200 SCALE IN FEET SOURCE: ATWELL-HICKS, OWG # 400625WS01, 11/05/2004 N'

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'V 5t 4RETEC Figure 3-5 Residenltial Well Locations

/6450 Dresden Road 8179 Thorsen Lane 8177 Thorsen Lane 8175 Thorsen Lane 8171 Thorsen Lane

- 8167 Thorsen Lane 6310Dresden Road (Thorsen Well, D-23)

- 8159 Thorsen Lane

-- 8150 Thorsen Lane 147 Thorsen Lane 8045 Tamarack, 8035 Tamarack and 6010 Dresden Road are Southof bhmap area,

4 Tritium Results Tritium concentrations were obtained from groundwater, storm sewer, and surface water samples obtained from the Dresden Station under a long-term monitoring program. Upon review of data obtained from ,a July 31, 2004 sampling event, the presence of a release from the CST system was identified.

Elevated tritium concentrations were detected in three storm sewers and all of the sampled baby 'wells. The following sections discuss the effect of the release on the tritium concentrations in the shallow groundwater near the CST system, and the tritium concentrations in the groundwater outside the CST system area and in the surface water. Also, the potential for off-site migration of tritium to the residential area south of the station is discussed. The historical tritium concentration data are provided in Appendix F.

4.1 Shallow Groundwater Associated with CST System The shallow groundwater in the vicinity of the CST system is monitored by the W-, T-, R-, and E-series baby wells (Figure 4-1). The W-series baby wells monitor the groundwater located east of the liquid nitrogen tank and west of the Unit 2/3 interlock building. On July 3 1, 2004, the tritium concentrations detected in wells WI and W3 were 3,612,931 and 6,125,891 pCi/L, respectively. The highest tritium concentration from any of the water samples was recorded from well W3, located adjacent to the interlock building, on September 3, 2004 at 10,312,000 pCi/L. Well WI was located west of well W3 and had a concentration of 2,594,000 pCi/L on September 3, 2004. Well W2 was dry during this period; therefore, groundwater samples could not be collected from this location. Baby wells WI and W2 were later removed during construction activities.

Following repair of the broken pipe in November 2004, tritium concentrations decreased drastically in well W3. This well had a concentration of 542,667 pCi/L on November 22, 2004, which decreased to 161,000 pCi/L on May 19, 2005. Replacement well W2R was installed on November 23, 2004 to replace baby wells WI and W2, which were removed during construction activities.

Another well was attempted further west; however, there were too many utilities in the area to risk using a hollow-stem auger rig to drill. Also the Pottsville Sandstone was encountered too shallow to intercept the water table using the air knife to drill a hole. Tritium concentrations in well W2R ranged from 48,000 to 301,000 pCi/L in three samples collected between December 2, 2004 and February 1, 2005, and then dropped to 182,000 pCi/L in May 19, 2005. The changes in tritium concentration with time in the W-series baby wells are presented in Figure 4-2.

J09ged and CPridential P*epared at the Di ctonofCo el

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris. Illinois The T-series baby wells monitor the groundwater located east of the Unit 2/3 interlock building. On July 31, 2004, the tritium concentration in well T6 was 1,960,331 pCi/L, which was the highest concentration measured in these wells before the pipe was repaired. Analytical results from baby well T5, which is located approximately 7 feet east of T6, reported a tritium concentration of 41,662 pCi/L on July 31, 2004 and a maximum concentration of 404,437 pCi/L on August 28, 2004.

Baby wells T7 and T3 were located approximately 10 feet south of wells T6 and T5, respectively, before their removal during construction activities. The maximum concentration for well T7 was 958,000 pCi/L measured on September 3, 2004, and the maximum doncentration for well T3 was 119,763 pCi/L measured on August 28, 2004.

Tritium concentrations gradually increased in baby well TI, located approximately 35 feet east of well T3, from 7,473 to 131,000 pCi/L by March 8, 2005. The April 8, 2005 groundwater sample yielded a result of 262,990 pCi/L. Subsequent concentrations in well TI from April and May 2005 ranged from 189,000 to 252,000 pCifL. The maximum concentration in baby well T2 located adjacent to TI was 58,000 on October 25, 2004. The tritium concentration in well TI has remained near 5,000 pCi/L since the pipe was repaired. The changes in tritium concentration with time in the T-series baby wells are presented in Figure 4-3.

The R- and E-series baby wells also experienced increases in tritium concentrations as shown from the July 31, 2004 sampling events; however, concentrations in these wells have typically remained near or below 5,000 pCi/L following repair of the pipe, with the exception of well R-2. In wel R-2, tritium concentrations reached a maximum of 12,000 pCi/L on October 25, 2004 and then decreased to 3,000 pCi/L on April 25, 2005. It should be noted that baby wells ES, E9, and E10 were installed on November 23, 2004. The changes in tritium concentration with time in the R- and E-series baby wells are presented in Figures 4-4 and 4-5, respectively.

Tritium concentrations for the baby wells in the vicinity of the CST system for September 3, 2004 and April 8, 2005 are presented in Figures 4-6a and 4-6b, respectively. According to these figures, the tritium-impacted groundwater is migrating east as, evident from the decrease in tritium in wells W3 and T6, and an increase in well T1. It is likely that the tritium is also migrating west as indicated by the sudden increase in the tritium concentration in well DSP124 located northwest of the CST system The directions of plume migration are consistent with the horizontal hydraulic gradient in the vicinity of the CST system as described in Section 3.4.2.

Pivilege f hion ..)ential 4-2 d at the Dire nsel

Groundwater Tritium Investigation Report - Dresden GeneratingStation,Morris, Illinois 4.2 Storm Sewers 4.2.1 Flow Path of Storm Sewers The storm sewer system layout has been determined from available data, such as catch basin location and depth, and utility drawings (Figure 4-7). In addition, it has been assumed that the sewer pipe is aligned with the bottom of the catch basins, thus the variation in the measured depth to bottom of the catch basins is representative of the slope of the sewer pipe. The depth to bottom of the catch basins ranged from 2.5 to 10 feet below ground surface.

In the CST system area, the depth to bottom of the catch basins is approximately 2 feet below the water table. No additional catch basin or sewer system construction information was available for this report; therefore, it has been assumed that the roof gutter systems from turbine and office buildings drain directly to the local storm sewer, and that there is no immediate drainage to the storm sewer system from the bermed storage tank areas.

4.2.2 Stormwater Flow and Drainage Areas There appear to be two active sewer systems located in the vicinity of the CST system (Figure 4-7). Catch basins located on each of these sewer systems have been included as part of the tritium monitoring program. Two additional sewers appear to be located to the south of the turbine building. It appears that these unmonitored sewers drain to a stormwater drainage ditch located on the south edge of the plant.

One sewer appears to originate immediately to the east of the liquid nitrogen tank. The original terminus of this sewer was catch basin (CB) M, which was demolished during excavation activities related to the pipe repair. This sewer drains the area around the southeastern and northeastern perimeter of the turbine building, in addition to the portion of the site located between Unit I and the Kankakee River. This sewer discharges to the Unit I intake canal through storm sewer DSP132, though the exact location of the discharge to the canal is unknown.

The second sewer originates immediately to the west of the liquid nitrogen tank and drains the area around the western perimeter of the turbine building, as well as the area to the northwest of the turbine building. This sewer drains to the Unit 2/3 discharge canal through an outfall located in the west side of the canal. The closest monitored catch basin to this outfall is storm sewer DSPI3I.

4.2.3 Potential Groundwater Ingress A total of 24 catch basins (storm sewers) have been included in the tritium monitoring program for the April 8, 2005 sampling event. Fifteen of these Privildan 4-3 P?ýaredat lh ,ecio

Groundwater Tritium Investigation Report - Dresden GeneratingStalion, Morris, Illinois catch basins are located along the eastern sewer system, including (in order of proximity to the outfall) DSP132, CB A, CB B, CB C, CB D, CB E, CB F, CB G, CB H, DSP134, DSP140, CB J, CB K, DSP135, and CB M (removed).

Of the remaining 14 catch basins, elevated tritium concentrations have been detected in II since July 31, 2004. The only non-impacted catch basins appear to be CB C, CB E, and CB H.

The highest tritium concentrations detected were 4,305,000 pCi/L in CB M and 3,000,000 pCi/L in DSPl35 during the September 2004 sampling event.

The most recent sampling event for which data are available occurred in May 2005 and reported a tritium concentration of 129,000 pCi/L in DSP135. Only DSP135 (closest to the tritium source'area), DSP132 (closest to the sewer outfall), DSPI40 (downstream of DSP135), and DSP134 (inside a bermed tank area near DSPI40) have been continuously monitored since September 2004. The changes in tritium concentration in the storm sewers over time are presented in Figure 4-8.

Nine catch basins included in the tritium monitoring program are located along the western sewer system, including (in order of proximity to the outfall) DSP131, CB V, CB U, CB T, CB S, CB R, CB Q, CB N, and CB P.

The tritium concentrations in these catch basins with the exception of CN N, were between 1,000 and 4,000 pCi/L. Tritium concentration in CB N was 16,000 pCi/L on September 1, 2004 and then dropped to 1,000 pCi/L on subsequent sampling on September 4, 2004. Only DSP131 has been continuously monitored since September 2004.

Based on this data from the tritium monitoring program, tritium appears to have migrated mostly into the eastern sewer system and to a lesser extent into the western sewer system (Figure 4-7). It appears that the source of tritium in the eastern sewer system is from the CST system area, as samples from the catch basins immediately east of the liquid nitrogen tank (DSPI35 and CB M) yielded the highest tritium concentrations.

Due to limited catch basin monitoring data in the western sewer system, the source of tritium is harder to identify. However, the increase in tritium concentration in DSPI31 from 101 pCi/L in August 1,2003 to 1,579 pCi/L in July 31, 2004 suggests that it was impacted by the release. The source of the tritium ingress is likely located along the sewer line between CB P and CB N, within the groundwater tritium plume.

4.3 Site-Wide Shallow Groundwater The groundwater in the upper aquifer is monitored by 34 monitoring wells installed across the station, excluding the baby wells. The locations of these wells are shown in Figure 4-9. With the exception of three shallow wells, all other monitoring wells installed in the upper aquifer are 35 to 50 feet deep intermediate wells. The three shallow wells are 12 to 15 feet deep.

Privileged 'C-odential 4.4 Prepareat the Diesel

Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris,Illinois There are two wells, DSPI24 and DSP125, located immediately northwest and east of the CST system area, respectively. Well DSP125 maintained consistently low tritium concentrations of less than 200 pCi/L. Well DSP124 on the other hand showed a steep increase in tritium concentration on August 1, 2004 at 91,166 pCi/L, followed by a decline to 4,060 pCi/L on April 8, 2005. This sharp increase corresponds to the release from the CST system detected on July 31, 2004. Prior to August 1, 2004, the tritium concentrations in DSP124 showed a steady decreasing trend in concentration from near 9,000 pCi/L in September 1994 to less then 2,000 pCi/L in June 2003. The changes in tritium concentration with time in wells DSP 124 and DSP 125 are presented in Figure 4-10.

There are five monitoring wells, DSPI05, DSPI06, DSPl07, DSPIO8, and DSP 123, installed near the Unit 1 reactor. The tritium concentrations in wells DSPI05, DSP106, and DSP107 show a steady decrease in concentration since, May 1994. Well DSPI05 shows a decrease from slightly over 5,000 pCi/L in May 1994 to about 300 pCi/L in November 2004. Well DSPI06 shows a decrease from 18,000 pCi/L in May 1994 to about 3,000 pCi/L in April 2005.

Well DSPI 07 shows a decrease from 26,000 pCi/L in May 1994 to near 9,000 pCi/L in November 2004. Well DSP108 shows a sharp decrease in concentration from about 50,000 pCi/L in May 1994 to less than 3,000 pCi/L in April 2005. Well DSP123 shows a very small decrease in concentration from about 25,000 pCi/L in May 1994 to slightly over 12,000 pCi/L in April 2005. No noticeable changes in tritium concentrations were observed in these wells on July 31, 2004 or shortly afterward. The changes in tritium concentration with time in wells DSP105, DSPI06, DSPI07, DSPI08, and DSP]23 are presented in Figure 4-11.

There are five monitoring wells located north of the Unit 2/3 intake canal.

Well DSP122 was installed near the Unit 2/3 discharge, and wells DSPI48, DSP149, DSP155, and DSP156 were installed in the area bound by the Unit 2/3 discharge and the recycling canal, Well DSP122 shows a decrease in concentration from about 13,000 pCi/L in December 1994 to slightly over 1,000 pCi/L in April 2005. Wells DSPI48 and DSPI56 show low levels of tritium at less than 300 pCi/L, and well DSPI55 shows tritium concentrations of less than 1,000 pCi/L, with the exception of one value of 3,713 pCi/L on February 26, 2003. Well DSP149 shows large fluctuations from April 1995 to February 2004, with maximum concentrations of 76,488 pCi/L in March 3, 2002 to minimum concentration of 404 pCi/L in May 24, 1999. As discussed in Section 2.1.3, the tritium concentration and the water level data from DSP149 were anomalous. As a result, the well was repaired, and subsequent sampling yielded a tritium concentration of 121 pCi/L on April 8, 2005.

Based on the concentrations in these wells, it appears the groundwater impact from the CST system did not affect these wells. The changes in tritium concentration with time in wells DSP122, DSP148, DSP149, DSP155, and DSPI156 are presented in Figure 4-12.

Privile& a"andCo*o dential f5 4-5 Pezd at the DiWsta.PfoCfounse)

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris,Illinois Kaway The tritium concentrations in the remaining monitoring wells installed farther from the CST system were at low levels, usually below 200 pCiIL. Also very little variation of tritium was detected in these wells over time. The tritium concentrations in all monitoring wells outside the CST system area for September 3, 2004 and April 8, 2005 are presented in Figures 4-13a and 4-13b, respectively. The April 8, 2005 data are also provided in Table 4-1. As can be seen from these figures, the groundwater impact from the CST system is confined to a small area. Outside this impacted area there is no evidence of elevated tritium concentrations associated with the CST system. A slightly elevated tritium concentration was observed in the intermediate monitoring well DSPI59M located across the cooling canals approximately 3,400 feet south of the CST system. The tritium concentration in this well is discussed in Section 4.5.

4.4 Surface Water Surface water received from the Unit 2/3 intake runs through the facility outside of the reactors to control the temperature, then is discharged through the Unit 2/3 discharge flume into the hot canal. The hot canal flows southward to Dresden Cooling Lake, where the water circulates and is returned north via the cold canal. Except during typical summer conditions, some or all of the surface water is returned to the Unit 2/3 intake canal to be recycled through the facility for cooling, and the rest is discharged to the Des Plaines River.

Tritium concentrations in the Unit 2/3 intake canal (DSP50), the cold canal (DSP34A), and the Unit 2/3 discharge canal (DSP20) for the period of May 1994 to May 2005 are presented in Figure 4-14. The locations of these surface water sampling points are shown in Figure 4-9. It can be seen from Figure 4-14 that there is a similar pattern with increasing trends of tritium concentrations in these three surface water samples. The maximum concentration in DSP50 is 6,194 pCi/L on September 27, 2004; in DSP34A is 5,437 pCi/L on September 23, 2004; and in DSP20 is 5,978 pCi/L on November 1, 2004.

4.5 Off-Site Migration The groundwater tritium plume is confined to a small area within the CST system, as discussed earlier. There is no evidence of off-site migration of tritium in groundwater from the Dresden Station, including toward the residential area to the south. Tritium concentrations in all monitoring wells south of the CST system area as well as south of the Protected Area, except for well DSP I59M, had concentrations less than 200 pCi/L, which is the low limit of detection by the laboratory. Well DSP I59M is located between the cooling canals and the Thorsen well, and is most likely impacted by tritium concentrations in the cooling canals rather than tritium migration from the station.

PrivilegeddCo~ndential 4-6 Prepýat the Dirkion unsel

Groundwater Tritium Investigation Report - Dresden Generating Station, Morris,Ilinois The Thorsen well, located approximately 3,400 feet south of the CST system area, consistently showed tritium concentrations below 300 pCi/L until 1995, and then a more steady increase was noticeable by 1997. Tritium concentrations ranged from 232 to 940 pCi/L between January 1997 and April 2005. The changes in tritium concentrations with time in the Thorsen well (D23) and the cold canal (DSP34A) are presented in Figure 4-15. It can be seen from this figure that tritium concentrations in the Thorsen well and the cold canal show a similar pattern. Also, there is a steady increasing trend in tritium concentrations in the Thorsen well parallel to the increasing trend in the cold canal. Water samples collected from the cold canal and well DSP159M located east of the canal on April 8, 2005 measured tritium concentrations of 1,339 and 533 pCi/L, respectively (Table 4-1). A water sample collected from the Thorsen well on April 15, 2005 measured a tritium concentration of 653 pCi/L. There appears to be a strong correlation between the Thorsen well tritium concentration and the cooling canal as groundwater flows from the cooling canals to the Kankakee River in an eastward direction.

Tritium has been detected in groundwater samples collected from only one other residential well (8167 Thorsen Lane) located cast of the Thorsen well along the Kankakee River. A groundwater sample was collected from the well at 8167 Thorsen Lane on December 2, 2004, and the sample was split for analysis by two independent laboratories. Due to the discrepancy in results (366 pCi/L vs. 114 pCi/L), another sample was collected on January 13, 2005, and four aliquots were reported ranging in concentration from 360 to 480 pCi!L. Another sample was collected on April 15, 2005, and the reported tritium concentration was 542 pCi/L.

Prtvileg4and aonfidentia 4-7 P7re1f6d at the lre-Toon of Counsel

Table 4-1 Tritium Concentrations - April 8, 2005 Groundwater Surface Water I ruum I rillum Sampling Concentration Sampling Concentration Location (pCi/liter) Location (pCI/llter).

DSP-106 3,230 DSP-131 1,402 DSP-108 2,670 DSP-1 32 1,524 DSP-118 107 DSP-134 8D166 DSP-119 14 DSP-135 85,192 DSP-121 46 DSP-137 1,385 DSP-122 1,219 DSP-140 45,137 DSP-123 12,414 QSP-34At 1,169 DSP-124 4,060 DSP-34B 1,339 IDSP-125 144 DSP-34B (DUP) 1,601 DSP-126 96 DSP-DOP 82 DSP-127 32 Pump&Hose 29 DSP-149 121 DSP-150 114 OSP-1 51 241 DSP-1-52 72 DSP-1353 -18 DSP-1 54 -3 DSP-1 56 161 DSP-157M -21 DSP-157S 130 DSP-157S (DUP) 93 DSP-1 58M -11 DSP-158S 78 DSP-159M 533 DSP-159S 110 E-2 541 E-3 686 E-5 -72 E-8 3,140 E-9. -1,870 E-1 0 858 R-1 1,127 R-2 5,866 R-3 3,936 T-1 262,990 T-1 (DUP) 262,874 T-2 5,077 T-6 422,424 T-6 (DUP) 412,906 W-213 260,948 W-3 244,229 W-3( DUP) 241,488 Thorsen Well 653 Note: Thorsen well sampled on April 15, 2005 Table 4-1 Tritiumn Concentrations April05 Page 1 of I

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+ , ,_J .... ....... ... * "

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-ON GENERATION TRITIUM CONCENTRATION MAP ORRIS ILLINOIS APRIL 4,2005

=XENW-18513-400 DRESDEN STATION WN7 F3c-V/CON IFIGURE 4-13b

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Figure 4-14 Tritium Concentration vs. Time In Unit 2/3 Intake Canal, Cold Canal, and Unit 2/3 Discharge Canal 10,000 U

C 0

2 1,000 C

0 U

E i-100

-t LO 0) 0 0)

O 0 0) 0 9 N M

, 9 9 9 1 M~ 0 CO 0 cu 0 0 0 9'aC3 0 C

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Figure 4-15 Tritium Concentration vs. Time in Thorsen Well and Cold Canal iF 10,000 Thorsafi Wefl

1,000 C -AP--DSP-34A 0

E 100 10 (l 0W ) 0 N Ml M 'I Tr 0I CP 0 ) 0 0 ) 0 )) C? E) 0 0 0 0 0

> C 6) -' - >, C) fl 0. - 6 -1 U >

Cs 0 :3 ns M l (Da) 0.., 0 (V : Co SZ - -, < 0 LL CI) < Z <I 0-Date

5 Tritium Impacts Evaluation 5.1 Regional Background Tritium Levels Tritium is a naturally occurring radioisotope of hydrogen, which decays as a beta emitter (half life of 12.3 years). It is produced in small quantities in the upper atmosphere where it is readily incorporated into water, and therefore, is present in rainwater and surface recharge to aquifer systems. In comparison to many other atmospheric radioactive isotopes, tritium is extremely rare and not affected by any chemical or biological processes. The naturally occurring tritium level in rainwater (pre-bomb era of early 1950 and before) is estimated at 5 to 10 tritium unit (TU), where one TU is equivalent to one tritium atom per 101s hydrogen atoms and an equivalent gross beta radiation of 3.2 pCi/liter.

During the mid-1950s and early 1960s, the amount of tritium in the atmosphere was greatly increased as a result of nuclear weapons testing causing recharge waters to be "tagged" with excess tritium. Nuclear weapons testing resulted in atmospheric tritium levels in excess of 1,000 TU, with peaks occurring in 1963. However, since then, the values have declined due to the elimination of atmospheric nuclear weapons testing and radioactive decay. Present day background values in the range of 50 to 100 TU (i.e., 160 to 320 pCi/L) are common in the environment (Michigan DEQ, 2002). For all practical purposes, the regional background tritium level in the Dresden Station area will be considered to be equal to or less than 320 pCi/L.

5.2 Tritium Mass Release Assessment Dresden Station personnel conservatively estimated that tritiated water was released from the CST system and discharged into the ground over a period of 344 days between November 2003 and October 2004 at a rate of 1.31 gallons per minute (gpm). The -concentration of tritium in the CST system was approximately 9 to 10 million pCi/L. Based on these estimates, a total of 643,000 gallons of tritiated water, containing a total mass of approximately 2.31 xl01 pCi of tritium, was released from the CST system.

Upon release, the tritiated water infiltrated through the unsaturated zone and into the groundwater. Because this location was situated within a groundwater mound, the release was transported in multiple directions. In addition, the depth of the foundation beneath the turbine building and reactor units extends to a depth of greater than 40 feet below ground surface, creating a hydraulic barrier to the north for shallow groundwater flow. Also, the excavation outside the foundation of the building and the backfill with permeable material (sand) created preferential pathways for groundwater flow around the building foundation. The primary local groundwater flow directions from the location of the release are to the east and to the northwest.

Privileged Con-dentia 5-1 Prrat the Direction 0f*ne

Groundwater Tritium InvestigationReport - Dresden GeneratingStation, Morris, Illinois 5.2.1 Shallow Groundwater Contribution To represent the downstream transport of tritium using available monitoring data from the shallow monitoring wells, RETEC calculated the mass flux of tritium along several planes drawn perpendicular to the tritium plume in each groundwater flow direction. Figure 5-1 indicates the approximate limits of the tritium plume and the planes along which the mass flux was calculated.

Detailed descriptions of the calculations performed in this evaluation and complete results are contained in Appendix G. The Darcy velocity was estimated using the hydraulic conductivity (K) value calculated from slug tests conducted at shallow monitoring well DSPI57S and the hydraulic gradient (i) calculated from groundwater elevations measured in shallow wells in the vicinity of the CST system in April 2005:

.,=Ki=3.29xlO-1fm0' f.in x 0.014ff

= 4 .6 1 1x0-4 fi/ x1440min/y x0.3048

/ inday - ft

=0.20,-//y

~/ day

v. Ki=3.29x10-' f/min n 0n0086%,

4 2.83 - f inday O ft d*ay Using the average tritium concentration (C) for each plane, the mass flux was calculated as follows:

Flux ý CVd The mass flux observed along each plane is graphed versus time for groundwater flow to the east and west in Figures 5-2 and 5-3, respectively.

As anticipated, the graph of flux east of the release indicates that planes drawn farther from the source generally show later peaks in mass flux, with peak flux values lower than planes drawn closer to the source. The distance between Plane 4 and Plane 5 divided by the time between peaks on the respective mass flux graphs for these planes gives an estimate of the travel time of the release equal to 4.7 centimeters per day (cm/day) to the east of the source area. The lack of a discernable peak in mass flux in Planes I through 3 likely indicates that these peaks were missed in the lag in monitoring between samples taken prior to the release and the July 2004 sample collection. Because only one monitoring plane could be drawn to represent data collected west of the release, a travel time of the release in this direction was not calculated. Note that the mass flux graph in the western direction does not show a discernable peak. It is also likely that the peak in mass flux in this direction was missed in the lag in monitoring.

Privileged aýtCofi ntial 5-2 Prepar.dIthe Dirertton -ounvel

GroundwaterTritium InvestigationReport - Dresden GeneratingStation, Morris.Illinois To estimate the mass discharged over the area of each plane in units of pCi per square meter, the average mass flux between sample dates was multiplied by the number of days between samples. The plume cross-sectional area was then modeled as follows. The width of the plume at the source was estimated to be approximately 20 feet based on the geometry of the source area at the release. Based on the depth of the deepest shallow monitoring well, the depths of both the eastern-moving and western-moving plumes at and near the source were estimated as 10 feet. These dimensions give a cross-sectional area of 200 square feet at the source.

Based on a typical plume geometry identified in Fetter (1999), a ratio of longitudinal dispersivity (i.e., along the plume centerline) 'to transverse dispersivity (i.e., outward from the plume centerline) was assumed as 10:1.

Therefore, based on an estimated plume length of 210 feet in the eastern direction, a maximum plume width was approximated as the source width plus twice the lateral dispersivity, or 62 feet. Likewise, using an estimated plume length of 255 feet in the western flow direction, the maximum width of the plume is approximated as 70 feet. By multiplying the mass discharged per square meter by the modeled area of the plume, the total mass discharged through each plane was estimated for each sample period. Finally, by summing the mass discharge during each sample period, the total mass of tritium discharged through each plane was approximated.

) Since no monitoring plane exists at or near the source in the western direction, the source concentrations in this direction were estimated based on monitoring at Plane 10. An analytical model (BIOSCREEN) was applied to simulate a one-dimensional solute distribution using site-specific and constituent-sp*cific information (USEPA, 1997). The model inputs are described in more detail in Section 5.4. 1. For calculation of the western source concentration, the plume length was set equal to 255 feet, as shown in Figure 5-1. The tritium source was modeled as a continuous source for a period of one year. The source concentration was then adjusted iteratively until the concentration at the end of the plume, approximated the value of 55,000 pCi/L based on the concentration detected at well DSP-124 on July 31, 2004. The resulting western source concentration is estimated at 200,000 pCi/L during the release.

Using the degradation rate of concentrations detected at DSP-124, a degradation rate was applied to the western source concentration for each sample date to approximate a total mass discharged to the west through the theoretical plane drawn at the source location.

Based on the modeled planes nearest the source, approximately 4.18xI0'2 pCi has been discharged to'groundwater flow east of the release and l.81 x 10" pCi has been discharged to groundwater flow west of the release, for a total mass 2

of4.36xl0' pCi discharged to groundwater. Based on a tritium concentration

.) in the CST system of 9 to 10 million pCi/L, as estimated by Dresden Station Privileged and Cjdentiaf 5-3 Preparda Diri f

Groundwater Tritfum InvestigationReport - Dresden Generating Station, Morris, Illinois personnel, this mass equates to approximately 121,000 gallons of tritiated water released to groundwater.

5.2.2 Storm Sewer Contribution A portion of the Dresden Station storm sewer lies within the identified area of the tritium plume. Groundwater measured in shallow wells in the vicinity of the CST system is approximately 2 feet higher in elevation than measured invert elevations along the plant storm sewers (assumed to be 18 inches in diameter). Analysis of samples collected from storm sewer catch basins within the identified tritium plume (DSP134 and DSP135) and at the outlets of storm sewers draining east to the Unit I intake canal (DSP132) and west toward the Unit 2/3 discharge canal (DSP133), indicate significant increases in tritium concentrations following the estimated time of release from the CST system. These observations indicate that a portion of the tritium released to groundwater is infiltrating into the storm sewers flowing in each direction and discharging to the respective storm sewer outlets into the Unit 1 intake canal and Unit 2/3 discharge canal. Tritium discharged to the Unit I intake canal lies stagnant in the non-operational intake, while that discharged to the Unit 2/3 discharge canal flows through the hot canal to Dresden Cooling Lake prior to return flow through the cold canal, and out to the Des Plaines River or back into the Unit 2/3 intake.

Daily precipitation data from the Dresden Island Weather Station, obtained from accuweather.com, was used to estimate an average daily rate of runoff over the east-draining and west-draining storm sewer drainage areas. Since the majority of the drainage area for the storm sewers is covered in impervious material (e.g., asphalt or rooftops), it was assumed that 85% of the precipitation flows to the sewers as runoff. The volume of daily runoff was therefore calculated as .85% of the precipitation depth multiplied by the drainage basin area for each daily precipitation depth.

A base flow rate, due to groundwater ingress into the storm sewers, was also estimated for each sewer. It was assumed that approximately 10% of the sewer pipe surface area was cracked, allowing groundwater ingress through the cracks. Assuming that groundwater ingress occurs over approximately one-half the surface area of the pipe, the area subject to ingress was estimated by multiplying the pipe circumference times the length times 0.5. The groundwater seepage velocity was estimated in each direction using the hydraulic conductivity value and hydraulic gradient values identified above, with an assumed effective porosity of sandstone equal to 15% based on a typical value stated in USEPA (1989).

) _

Prvp*",k n*an ,afidential. 54 Pakparedat the oii.seiaaiunsel

Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris, Illinois Ki 3.29Xx10-2ft/rrmi x0"014 f/

n 0.15

=3.07x10-' mt x1440Tnina xO.3048m

=13 5 -/ day 1.3 Ki 3.29 x 10' f*/im x..00086%,

n 0.15

=.89x10 mn 1440mi x 0.3048 7t

= 0.83 dy The base ingress flow for each storm sewer was then estimated as the ingress area times 10% (cracked percentage of pipe) times the seepage velocity calculated as discussed above.

Based on addition of the estimated runoff and base flows, a daily storm sewer flow was estimated for each sewer. Daily tritium concentrations in the outlet catch basins were estimated based on a linear interpolation between sampling dates. By multiplying the daily tritium concentration in the outlet catch basin by the estimated daily flow rate, the daily mass of tritium discharged through each outlet was estimated. Summing these results since the estimated start of 2

the release indicate that a total of 5.27x101 pCi has been discharged to the Unit I intake canal and 7.33x10]' pCi has been discharged to the Unit 2/3 discharge canal, for a total mass of tritium discharged through the plant storm 2

sewers of approximately 5.34x1 01 pCi. Based on an estimated tritium source concentration of 9 to 10 million pCi/L by Dresden Station personnel, this mass equates to approximately 148,000 gallons of tritiated water released to the storm sewer.

5.2.3 Net Release of Tritium Mass The net release of tritium mass was evaluated from the analyses of discharge to groundwater and storm sewers as follows. Since the mass discharged to groundwater in the western direction greatly exceeds the mass discharged to the western storm sewer, and the western storm sewer lies downgradient of the release, it is assumed that the mass observed in the western sewer represents a portion of the mass observed in groundwater. In the eastern direction, however, the estimated source mass discharged to stormwater exceeds the mass discharged to groundwater at the monitoring point nearest the source (i.e., Plane I in Figure 5-1). Since the eastern storm sewer originates immediately within the source area and follows near the plume Privile 4anjConfidea .5-5 ed at th crc-tionofCounsel

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris, Hlhinois centerline, it appears that much of the source mass may be discharging to the storm sewer upgradient of Plane 1. Therefore, the total mass discharged in the eastern direction is estimated by adding the contribution observed in groundwater at Plane I to the estimated mass discharged to the eastern storm sewer.

Based on these analyses, the-net tritium mass discharged to the groundwater and to the storm sewer from the CST system is approximated by adding the mass discharged to the western flowing groundwater (i.e., mass at the theoretical source plane), the mass discharged to the eastern flowing groundwater (i.e., mass at Plane 1), and the mass discharged to the eastern storm sewer (i.e., through DSPI32). This provides a net tritium mass of 9.63x 1012 pCi released to the groundwater and storm sewer system in the vicinity of the liquid nitrogen tank. Based on an estimated tritium source concentration of 9 to 10 million pCi/L by Dresden Station personnel, this total mass represents approximately 267,000 gallons of tritiated water released from the CST system, which is 42% of the volume estimated originally by the Dresden Station personnel.

5.3 Rate of Tritium Release Based' on the analysis presented in the previous section and a total mass of tritium released over the duration of the discharge from the CST system (i.e.,

344 days between November 2003 and October 2004 based on communication with Dresden Station personnel), the net rate of tritium released to the Dresden Station groundwater and sewer systems amounts to 2.80x 10" pCi per day.

5.4 Potential Impacts to Groundwater 5.4.1 Shallow Groundwater RETEC developed a conceptual model of fate and transport of tritium in the above-described groundwater plumes for the purposes of identifying the approximate length of time required for groundwater to deplete tritium concentrations at the source of the release. The solute transport modeling effort employed an analytical solution, developed by Domenico (1987), as the governing equation for transport of a decaying solute. The analytical model (BIOSCREEN) simulated a one-dimensional solute distribution using site-specific and constituent-specific information developed in the conceptual model (USEPA, 1997).

The source area defined in the conceptual model was the area surrounding the approximated location of the release. The estimated maximum plume length in each flow direction (i.e., east toward the Unit I intake canal and west toward the hot canal) was based on the maximum distance the tritium would travel in groundwater prior to entering plant canals. The source thickness was Privileg A nfidential - 5-6 Pre,5,ed at the BkeELOaiounsel

GroundwaterTritium InvestigationReport - Dresden GeneratingStation, Morris, Illinois estimated at 10 feet saturated thickness, based on the shallow depth of the pipe where release occurred (approximately 3 to 5 feet below ground surface).

The concentration of tritium at the source was modeled as a finite soluble mass, with a distinct source mass assigned to each direction of flow. The source mass contributing to the plume moving west from the source was estimated by subtracting the total tritium mass discharged through the storm sewer to DSP131 from the total mass discharged to groundwater in the western flow direction. It was assumed that preferential flow through the sewer reduces the mass in the plume downgradient of the point at which the total mass discharged to groundwater was evaluated (i.e., at the theoretical source plane). The source mass discharging east of the liquid nitrogen tank was taken as the total mass discharging to the groundwater. The calculated mass discharging to stormwater in the eastern direction exceeds the mass discharging to groundwater, indicating that (1) tritium enters the storm sewer upgradient of the monitoring points evaluated for discharge to groundwater (i.e., Plane 1), and/or (2) limited data during the early period of the release may miss the peak in tritium concentrations nearest the source, resulting in an underestimation of the mass discharged to groundwater.

Dissolved tritium migrates in the direction of groundwater flow through the process of advection, dispersion, and degradation. Advective transport is controlled by the direction and magnitude of the groundwater seepage velocity. Groundwater seepage velocity was calculated using site-specific values for hydraulic conductivity and hydraulic gradient, and an assumed value for effective porosity based on the sandstone aquifer. The hydraulic conductivity was taken as the value calculated from the slug test conducted at shallow monitoring well DSP157S, which is similar in lithology to the area of the CST. The average hydraulic gradient was estimated from water table contour maps developed from measurements of groundwater elevation during the sampling event conducted on April 8, 2005. The effective porosity was derived as the typical value for nonfractured rocks such as sandstone (USEPA, 1989). These parameters provide an estimate of uniform seepage velocity for the shallow aquifer.

The amount of dispersion is a function of the dissolved-phase plume size. The longitudinal dispersivity was modeled as a function of plume length using methods givei&by Xu and Eckstein (1995). The transverse dispersivity was taken as 10% of the longitudinal dispersivity (Gelhar et al., 1992). The vertical dispersivity was taken as 10% of the transverse dispersivity (ASTM, 1995). These relationships represent the low-end of typical dispersivity values presented in literature.

Degradation of tritium occurs through radioactive decay. Degradation of tritium was modeled as a first order decay reaction. The rate of degradation is described by the time it takes for the initial constituent mass to decay and is Prvilege Co denti 5-7 Prep d at the Direction of Counsel

Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris,Illinois commonly referred to as the half-life (th). The half-life value for tritium used in the modeling was based on a value of 12.3 years (Michigan DEQ, 2002).

Attenuation factors were established for each compound within BIOSCREEN based on the input parameters described above and listed in Table 5-1. After inputting these parameters, the simulation time was varied to identify the time after which concentrations of tritium in the plume were reduced to levels below background (typically 160 to 320 pCi/L).

Based on the results of the modeling, concentrations of tritium at the source and along the western plume (toward the hot canal) will decrease to below 90 pCi/L after. approximately 5 years from the pipe repair. Similarly, the concentrations at the 'source and along the eastern plume will drop below 290 pCi/L after approximately 8 years. Results for these time periods appear to be conservative based on a comparison of current monitoring data with the 1-year predictions from the BIOSCREEN modeling.

5.4.2 Residential Wells Based on the analysis of the site hydrogeology, it is most likely that the bulk of the tritium discharge to groundwater is flowing in the easterly and northwesterly directions under the influence of the local hydraulic gradient.

The relatively high seepage velocity calculated in shallow groundwater indicates that movement of the plume will likely continue to follow the local hydraulic gradient in each direction, flowing east alongside plant building foundations and northeasterly toward the Unit 1 intake canal, and flowing west alongside plant building foundations and northwesterly toward the hot canal. Because of this preferential flow path, the tritium plume is not likely to come under the influence of the regional gradient in the southeasterly direction, which is the only way groundwater impacted by tritium from the CST system could impact the residential wells south of Dresden Station.

)

Privileg Con dent! a 5-8 Pre~pdat the Direc*rfflfq Counset

`(,Ii Table 5-1 BIOSCREEN Modeling Site-Specific Input Parameters In ut Parameter Value Reference Value from calculations from slug test data (2005) for Hydraulic Conductivit, K 1.67E-02 cm/s shallow well DSP-157S Calculated horizontal gradient from groundwater Hydraulic Gradient, lust 0.014 feet/feet elevation data collected 4/2005 within the shallow Hydraulic Gradient, 6,v 0.0086 feet/feet aquifer.

Porosity, n 15 % Typical Effective Porosity of Sandstone (USEPA, 1989)

Maximum plume length upgradient ot former Unit 1 Plume Length, L5,,,t 1330 feet Intake Canal Maximum plume length upgradient of Unit 2/3 Plume Length, Lp.,t 890 feet Discharge (Hot) Canal Zheng and Bennet (1995). Taken as an order of Transverse Dispersivity, ay a,110 feet magnitude smaller than a.

Zheng and Bennet (1995). Taken as two orders of Vertical Dispersivity, a, a,/100 feet magnitude smaller than ax Modeled Source Thickness, Z 10 feet Assumed depth of Impacts at source Total mass estimated t nearest monntorng'p-oi~ntsto source. A larger component of source mass is likely

'discharged to storm sewer upgradlent of nearest Source Mass,,t, 4.18E+12 pCi monitoring points.

Total mass estmated -n groundwa era neares monitoring point to source minus total mass discharged Source Mass.,t 1.08E+1 I pCi through west storm sewer.

Tritium Half-Life 12.3 years . ichigan DEQ Iable5-1BIOSCREEN InpuitParameterss~1 l Page 1 of I

LEGEND STORM SEWER LINE CBH - - ARROW INDICATESFLOW DIRECTION S TRITIUMPLUME- EAST TRITUMPLUME- WEST DASHED WHERE INFERREI ILI .C8U ID- MONITORINGWELL FORMER MONITORING ID+- WELL (APPROXIMATE DSPII LOCATION)

ID 0 MONITORED CATCHBASIN UNMONITORED

8) CATCH BASIN VERTICALPLANE IDENTIFIEDFOR EVALUATION OF TRITIUMMASS t 25 0 50 EXELON GENERATION MORRIS ILLINOIS TRITIUMPLUME EXENW-5M DRESDEN STATION SCALEIN FEET

Figure 5-2 Mass.hFux East of Release Area 10000000000

-U--Plane 1 W1 W 2R

-- Plane 2 W3 A Plane 3 T-6 and T-7

- Plane 4 T-3 and T-5 1000000000 e---Plane 5 T-1 and T-2

. Plane 6 R-1, R-2 and R-3 is Plane 7 E-2, E-8 and E-9

--- Plane 8 E-3 and E-10 Plane 9 E-6 and E-7 100000000 E

5

- 10000000 1000000 .

100000 .........

10000 9 9 000 0 )

M (D Date

%w Figure 5-3 Mass Fi-A West of Release Area 4F 10000000000

-*--Plane 10 DSP-124 1000000000 -

100000000-E U

a 10000000A, x

1000000 100000 10000,

', LO 90 0

z LL < 0 Date

6 Summary Routine groundwater sampling results undertaken in July 2004 detected elevated levels of tritium in shallow monitoring wells and storm sewers located near the Unit 2/3 interlock building. The tritium originated from a release in the CST system through a pipe that passed under a liquid nitrogen tank. The pipe was shut down on October 20, 2004 and a replacement section of pipe around the tank was installed the following month. RETEC was contracted by Exelon to characterize the nature of groundwater flow at the facility and evaluate the fate of the tritium.

The following paragraphs summarize the results of this investigation:

The groundwater flow direction in the immediate vicinity of the liquid nitrogen tank is to the east and to the northwest. In the eastern half of the Protected Area, groundwater flows to the north toward the Unit I intake canal. West of the CST system groundwater flows westward toward the cooling canals. South of the Protected Area, groundwater flows to the southeast and southwest with a groundwater divide oriented northwest-southeast from well DSP 124 to DSPJ 52. Further south of the Protected Area in the residential area, groundwater flows from the cooling canals iJ eastward to the Kankakee River.

0 The horizontal hydraulic gradient values in the vicinity of the CST system calculated from the water table contour maps were 0.022 and 0.014 ft/ft to the northeast on October 28, 2004 and April 4, 2005, respectively. The average horizontal hydraulic gradient outside of the Protected Area ranges from 0.0046 ft/ft toward the southwest to 0.035 ft/ft toward the northeast.

Portions of the building are constructed directly on top of the Maquoketa Shale; therefore, groundwater flow in the water table aquifer is affected throughout its entire thickness around the facility. The hydraulic gradient shows groundwater flows toward the building with preferential lateral flow around the building to the east and west. This also can create a groundwater mounding effect around the building.

. Dresden Station is surrounded by surface water bodies that have a significant effect on groundwater flow.

The vertical gradient calculated at well DSP157, which is closest to the Protected Area, was 0.0032 fl/fl with an upward component.

The vertical gradients calculated at wells DSP158 and DSP159 Privileged 7r'5fideEntial?" 6-1 Prepargeatthe DOa*eRf Counsel

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris, Illinois were 0.017 and 0.0044 ft/fl, respectively, with downward components.

The geometric mean of hydraulic conductivity values calculated for the shallow wells were two orders of magnitude greater than the geometric mean for the intermediate wells installed just above the shale. The geometric mean of hydraulic conductivity for the 2

shallow wells is 2.4x10" fl/min (34.2 ft/day), and the geometric mean of hydraulic conductivity for the intermediate wells is 4.7x 10-4 ft/min (0.67 ft/day).

- A records search was performed to correlate residential water wells to the ISGS well records; however, none of these records corresponded to the Thorsen well located at 6310 Dresden Road.

The well records also did not correspond to the residential well located at 8167 Thorsen Lane.

. The residential wells were typically cased to 40 feet below ground surface and completed at depths of 200 feet or more. A well identified as ISGS Record #22798 had a casing set at 58 feet below ground surface. Since all of the wells, except ISGS Record

22798, had casings set at 40 feet below ground surface and the depth to shale was consistently 60 feet below ground surface, these wells are partially pumping water from the upper aquifer as water flows down the open hole beneath the casing outside of the pump.

0 The tritium-impacted groundwater is migrating east as evident from the decrease in tritium in wells W3 and T6, and a consequential increase in well TI. It is likely that the tritium is also migrating west as indicated by the sudden increase in the concentration in well DSP124 located northwest of the CST system.

There appear to be two active sewer systems located in the vicinity of the CST system. One sewer originates immediately to the east of the liquid nitrogen tank and drains the area around the southeastern and northeastern perimeter of the turbine building.

This sewer discharges to the Unit I intake canal through storm sewer DSP132. The second sewer originates immediately to the west of the liquid nitrogen tank and drains the area around the western perimeter of the turbine building. This sewer drains to the Unit 2/3 discharge canal through an outfall located in the west side of the canal.

Tritium appears to have migrated mostly into the eastern sewer system and to a lesser extent into the western sewer system. It Privile _6-2 Preled at th e ounsel

Groundwater Tritium Investigation Report - Dresden GeneratingStation, Morris, Illinois appears that the source of tritium in the eastern sewer system is from the CST system, as the catch basins immediately east of the liquid nitrogen tank have resulted in the highest tritium concentrations.

Tritium concentrations in the monitoring wells installed farther away from the CST system were at low levels, usually below 200 pCi/L, with very little variation over time. The groundwater impact from the CST system is confined to a small area. Outside this area there is no evidence of elevated tritium concentrations associated with the CST system.

" Tritium concentrations in the Unit 2/3 intake canal (DSP50), the cold canal (DSP34A), and the Unit 2/3 discharge canal (DSP20) for the period of May 1994 to May 2005 show that there is a similar pattern with increasing trends of tritium concentrations in these three surface water samples.

Based on the distribution of tritium in groundwater and the geometry of the release area, the width of the plume at the source was estimated to be approximately 20 feet. The depths of both the eastern-moving and western-moving plumes at and near the source were estimated as 10 feet. The plume length was estimated as 210 feet in the eastern direction with a maximum plume width of approximately 62 feet. Likewise, the plume length was estimated as 255 feet in the western flow direction with a maximum width of approximated as 70 feet.

The total mass of tritium discharged to groundwater flow east of the release was calculated as 4.18x10 1 2 pCi, and the total mass of tritium discharged to groundwater flow west of the release was calculated as l.81x10'f pCi. Based on a tritium concentration in the CST system of 9 to 10 million pCi/L, this mass equates to approximately 121,000 gallons of tritiated water released to groundwater.

" The total mass of tritium discharged to the eastern storm sewer system, which outlets into the Unit I intake canal, was calculated as 5.27x10' 2 pCi. The total mass of tritium discharged to the western storm sewer system, which outlets into the Unit 2/3 discharge canal, was calculated as 7,33xl10' pCi. Based on an estimated tritium concentration in the CST system of 9 to 10 million pCi/L, this mass equates to approximately 148,000 gallons of tritiated water released to the storm sewer.

Privileged fien.tial se 6-3 Prepa;Katthe Dounsel

Ground-water Tritium Investigatrion Report - Dresdeni Generating Stat ion, Morris Illinois S'The net tritium mass discharged to the groundwater and to the 2

storm sewer from the CST system is calculated as 9.63xl0' pCi.

Based on an estimated tritium concentration in the CST system of 9 to 10 million pCi/L, this total mass represents approximately 267,000 gallons of tritiated water released from the CST system.

" The net rate of tritium released to the Dresden Station groundwater and sewer systems, assuming that the total mass of tritium was released over the duration of the discharge from the CST system (i.e., 344 days between November 2003 and October 2004),

amounts to 2.80x1010 pCi per day.

I

" Based on fate and transport computer modeling (BIOSCREEN),

the concentrations of tritium at the source and along the western plume will decrease to below 90 pCi/L after approximately 5 years from the pipe repair. Similarly, the concentrations at the source and along the eastern plume will drop below 290 pCi/L after approximately 8 years.

The investigation concluded it is most likely that the bulk of the tritium discharge to groundwater is flowing in the easterly and northwesterly directions under the influence of the local hydraulic gradient. Movement of the plume will likely continue to follow the local hydraulic gradient in each direction. Because of this preferential flow path, the tritium plume is not likely to come under the influence of the regional gradient in the southeasterly direction, which is the only way tritium-impacted groundwater from the CST system could impact the residential wells south of Dresden Station.

t f

.7 References ASTM, 1995. Standard Guide for Risk-Based Corrective Action Applied at Petroleum Release, E 1739-95.

Bouwer, H. and R. C. Rice, .1976. A Slug Test for Determining Hydraulic Conductivity of Unconfined Aquifers with Completely or Partially Penetrating Wells, Water Resources Research, Vol. 12, pp. 423-428.

Domenico, P.A., 1987. An Analytical Model for Multidimensional Transport of a Decaying Contaminant Species, Journal of Hydrology, v. 91, pp 59-58.

Fetter, C.W., 1994. Applied Hydrogeology Third Edition, p. 91.

Freeze, R. A., and Cherry, J. A., 1979. Groundwater, Englewood Cliffs, NJ, 604 pp.

Gelhar, L.W., C. Welty, and K.R. Rehfeldt, 1992. A Critical Review of Data on Field-Scale Dispersion in Aquifers. Water Resources Research, Vol. 28, No.

7, pg 1955-1974.

Harza Engineering Company (Harza). 1991. Dresden Station Site Groundwater Study, July.

Harza Environmental Services, Inc. (Harza). 1995. Dresden Groundwater Study Report, Morris, Illinois, January.

HydroSolve, Inc., 2000. AQTESOLV for Windows 95/98/NT, Version 3.01 -

Professional.

Michigan DEQ, 2002. "Use of Tritiunm in Assessing Aquifer Vulnerability."

Michigan.gov. <<http://www.deq.state.mi.us/documents/deq-dwrpd-gws-wpu-Tritium.pdfl>> dated January 2002, accessed on June 16, 2005, 4:00 PM EST.

Newell, C.J, R.K. McLeod, J.R. Gonzales, and J.T. Wilson, 1996. "Bioscreen:

Natural Attenuation Decision Support System," Users .Manual, Version 1.3 and 1.4, National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, Ohio.

USEPA, 1989. Statistical Analysis of Groundwater Monitoring at RCRA Facilities, U.S. Environmental Protection Agency, Washington, D.C.

USEPA, 1997. BIOSCREEN, Natural Attenuation Decision Support System, User's Manual, Version 1.3 and Version 1.4 Revisions, United States Environmental Protection Agency, Office of Research and Development, EPA/600/R-96/087, August 1996 and Version 1.4 Revisions, July.

-!7-N PreT" d attheD*"Efi-ion of ounl

GroundwaterTritium Investigation Report - Dresden GeneratingStation, Morris. rllinois Willman, H. B., 1971. Summary of the Geology of the Chicago Area, Circular 460, Illinois State Geological Survey, Urbana, Illinois.

Xu, M, and Y. Eckstein, 1995. Use of Weighted Least-Squares Method in Evaluation of the Relationship Between Dispersivity and Scale, Ground Water, V. 33, No. 6, pp. 905-908.

Privilegedn d Co* a,, " 7-2 Prepor at the Direction ofCounsel

Appendix A Soil Boring/Rock Coring Logs and Well Construction Diagrams

Boring #: DSP-149R Boring R: Log Sheet I of I Q Project: Dresden Power Station Project #-. EXENW-18513-320 Clent* Exelon Nuclear Contract. *SC TM"Rig Type:Gu Poch UP-750C Method:

Bit Type: 6 Tricone Boring Diameter Location: Dre1*.n. Illno*s Northing'.8166.38 Easting 14621,11 Ground Elevation (ft_msl): 516.48 Total Depth (ft. bgs): 51.00 Start Date: 03129/2005 Backfill: Bentonilt Chips Logged By:. Torrey Morris Finish Date: 0313112005 Completion: Chocked by:

Sample Method: Dept to Groundwater

-Soil and Rock Description

& wb.IPO """ 5s 91, ereTWy Classiiicatlon Scheme: USCS/ASTM SAND: Clayey Sand, loose, fine grained, moist - 515 to very wet, yellowish brown (2.5Y 614) to grayish brown (10YR 5/2).

5

-510 10

- 505 15

-5*

-20 CLAY: Sandy Clay, stiff, very wet, gray (Gley 1

- 495 K, -25 6/N). hard pockets of limestone gravels.

- 490 LIMESTONE: Limestone, very hard, moist to wet, tight gray(Gley 1 7/N) to gray (Gley I 6/N).

-30 At 40 feet cuttings Indicate posslbble -485 transitional zone with pale green (Gley 1 612) shale (clay) cutting coming up hole, 35 -480

-40

-475

- 45

-470 SHALE: Shale, hard, wet, very dark greenish so5 gray (Gley 1 3/1).

Sample Type Sample Sample Soil Type I Remarks and Datum Used: SS =

Datum Used: SS -Soil Sample The RETEC and Remarks Group, In-.

8506 W. Bryn Mawr Aw. te.31 Chliaeo. IL M031 Phone: (773) 714-9900 Pea;(773) 714-98D5

Boring #: DSP-157S

'O RE"U Boring Log Sheet I of I Project: Dresden Power Station Dril Rig Type:Gus Pech GP.750C Location: Dresden, Illinois Project # EXENW-18513-320 Method: Northing: 6421.34 Easting: 14728.71 Client Exelon Nuclear Bit Type: 4 1/4" ID Auger Ground Elevation (ft. mel): 518.59 Contrator0 TSC Boring Diameter: Total Depth (ft. bgs): 13.00 Start Date: 0Zr25a2005 Beckfill: Bentorite Chips. Logged Or., Torrey Morris Finish Date: 02/2512005 Completion: Checked by:

Samleeh Soil and Rock DescripUon _

PD k.-la" "

TOPSOIL' Topsoil, soft, moist, black to dark brown (Gley 1 2.5/1).

CLAY: Sandy Lean Ciay. so~l, moist, yellowish brown (1OYR 6/3) to radish yellow (7.5YR 6/8).

SANDSTONE: Sandstone, hard, moist to very moist, pate brown (10YR 6(3) from 3 to 6 feet, _-51S gray (1OYR 6/1) from 6 foot to depth.

101 Remarks and Datum Used:

Sampie Type SS Soll Sample The REMTC Group. ict.

w.

feog sryn Mawr Ave. Si.. 301 Chie", IL 60e31 Phone: (773) 714-0900

, ...)

F-e; (773) 744-0005

A~rJ:c Boring BBoring Log S.=1o S: OSP.157M Shoot I of I Project Dresden Power Station Drill Rig Type:Gus Pech GP-750C Location: Dresden. Illinols Project #; EXENW-15513-320 Method: Northhv: 6421.S1 Esaltng: i 4721.74 Client: Exelon Nuclear Bit Type: 6" Triconr Ground Elevalon (ft. mel): s18.47 Contractor; "5C Boring Diameter Total Depth (ft. bga): 53.75 Start Dale: 02/17f2005 Backfill: Bentonite Chips Logged By: Torrey Morris Finish Data: 02/2112005 Completion: Checked by.

Sample Method: Dept to Gr tsr.

_ _Sample Beak .° a.Soil and Rock Description

& I ClassNfication Scheme: USCS/ASTM ". 4 TOPSOIL Topsoil, soft, moist, black to dark brown (Gley I Loan 2.5/1).C*sy, soft, moist, yellowish -55 CLY:Sad SANDSTONE: Sandstone, hard, moist to wet.

pale brown (lOYR 6/3) to gray (lOYR 6/1).

10 505 15 500

--20 4

KJ --495 25 LIMESTONE: Umestone, very hard, wet. white to light gray (SY 711) to pinkish white (7.SYR.

8/2), occasional pyrite, clay and sand stringers. 490

-30

--35

--480.

--40 LIMESTONE: Transitional zone, Limestone and Shale Interbedding, Limestone (same as above) majority of zone. Shale (weathered 48 small servaral inch thick lenses), hard, wet, pale green (Gley 1 6/2).

-470 50 SHALE: Shale, hard, moist to wet, very dard greenish gray (Gley 1 3/1).

_14A5 / i Remarks and Datum Used: Sample Type Tho R MTEC GreaP,'r SS =Soil Sample sees w. srop Mr Ave. Si., 301 Chirisa. Isash Phorn: (773) 714-e000 Fax" (73) 7144605

"3kETUEI OBoring Boring L#: Log Shoot I of 3 SP-15T7 Project Dresden Power Station Praoect M.EXEN'W-1 5513-320 Clent Exelon Nuclear DrIIlRig Typ.oeGu Pech GP-750C Method:

Bit Type: 8" Tricone Loctakn: Dresden, Illinois Northlng: 6420.9T Eastlng: 14714.44 Gmrund Elevation (ft. mis): 518.46 Q

Contrctor TSC Boring Diameter: Total Depth (ft. bgs): 130.50 Start Date: 0216/I2005 Backfill: Bentonite Chips Logged By: Torrey Morris Finish Date: =2=,005 Comletion; Checked by:

Sample Method:DettoGunwer Sample Typ*, grou- VID Soil and Rock Description Back-___ (P- _ _ a ClasifcatonSeme: USCS/ASTM __! L![

TOPSOII Topsol,. soft, moist, black to dark brown GI 12.5/11.

CLAY: Sandyý Lean Clay, soft, moist, yellowish brown (10R5/4), - 515 SANDSTONE: Sandstone, hard, moist to wet, pate brown (IDYR 6/3) to gray (10YR 6/1),

stringers.

510 10 505

-- 500 20

-495 25 LIMESTONE: Limestone, hard, wet, white to.

light gray (5Y 711), pyrite, clay stringers.

-- 490 30

- -485 S35

.480 Remarks and Datum Used: Sample Type

-. SS = Soil Sample BoosRETEGC Th. IN. B"y O-np, Mht- Awe, Ste. 301 ,

Chilasgo. IL 60631 Phmne: (773) 714-900 Pea: (773) 714-9805 j

U (j

<1 Boring #: DSP-157D 400REM Boring Log Shoot 3 of 3 Sample NumbjPI d j tP."l 14CWP t

.2 4z t

Soil and Rock Description Classlilcatlon Scheme: USCS/ASTM ii 0 a

- 430

-90

- 425

-98

- 420 100

-415 105

- 410 110

- 405 115 DOLOMITE: Dolomite, very hard, moist to wet, light brownish gray (2.5Y 612), c-rystallne, pyrite - 400 stringers..

'120

- 395 125

- 390 130 Remarks and Datum Used: Sample Type 7h1wgo RELS GOns831o SS = Soil Sample eo05W. 0ryn Met.r A.e, St.. 301 Chlceeo.LL 00631 Phone: (773) 714-500 (i)

Fa- (7731 714-D508

A0 rRTUE Boring Log Shoot 10:of DSP-158S Boring I Projeat Dresden Power Station Drl Rig Type:Gus Pech GP-750C Locai.tl: Dresden, Illinois Project 0: EXENW-10513-320 Method: Norlthng: 5438.73 Easting: 16942.48 Client Exelo Nuclear Bit Type: 4 1W' ID Auger Ground Elevation (it. rmet): 507.73 Contacto. TSC Boring Dicameter Tol Depth (ft. bgs): 13.50 Start Date: 021282005 Backfill: Bentonite Chips Logged By. Torrey Morris Flnish Date: 03/04/2005 Compietion: Checked by:.

Sample Method:

z Depth to Groundwatwr:

I-Bak

?dnL..

__' Soil and Rock Description Caataio

-U TOPSOIL Topsoil, soft, moist, black to dark brown (Glay 1 2.5/1).

CLAY: Sandy Lean Clay, soft, moist, light yellowiah brown (2.5Y 614),

-505

-5 CLAY: Lean Clay with sand, hard, moist, pale yellow (5Y 7/3).

-500 10 LIMSTONE: Limestone, very hard, moist, white (5Y 8/1) to gray (5Y5/1), crystaline.

-- 495 Remarks and Datum Used:

The RETMC Grup. In..

8605 w. ertn Mawr A". St., 301 ChicagO. IL 60631 I Sample Type SS = Soil Sample Phone: (773) 714-0O0

'rax: (773) 714-NOS05

Boring #: DSP-158M A& rT Boring Log Sheet 1 of I Project Dresden Power Station Drill Rig Type:GUs Poch GP-750C Location: Dresden, Illinois Project #-.EXENW-1 B51 3-320 Method: Northing' 5442.41 Easting:.15930.08 Client E~xeloln Huear Bit TyTpe,6" Air Hammer .Ground Etevation (ft. rmi): 507.97 Ctcr C Boring Diameter. Total Depth (ft. bgs): 57.50 Start Data: 03M0212000 Backfill: BentoRlite Chips Logged By: Torrey Morris Finish Date; O310=2005 C~orpletton: Checked by:

Method: _ _Sample Depth to Groundwater

" A0_Sample Soil and Rock DesIription

~

Nmpt PC 15- 1!5~ Classificatiotn Scheme: USCS/ASTM ________

TOPSOIL: Topsoil, soft, moist, black to dark brown (G4e I 25/1). 505 CLAY: Sandy Lean Clay, soft, moist, yellowish 5 brown (2.5Y 6/4).

CLAY: Lean to Clay, (SYR 6/8) stiff, moist. redish yellow 500 10 I(Gley gray (Gley 4/N)/laminated. 1 6WN)to dark gray LIMESTONE: Limestone. very hard, dry to very moist. crystaline, light gray (Gley I TN) to gray 495 15 (Gley 1 6/N) 1 to 2 feet bgs, light greenish aray (Gley 1 811) to white (Gley 1 B/N) below

22. small very dark gray (Gley 1 3/N) shale 20 stingers from 11 to e2 bgs, tot 490 485 25 480 30

-- 475 35 470 40 465 45 LIMESTONE: Transitional zone, Limestone and

-460 4

--50 Shale intoereddlng, Limestone (same as above) majority of zone. Shale (weathered small several inch thick lenses), hard, wet, pale 455 green (Gley 1 6/2).

SHALE: Shale, hard, moist to wet, very dark greenish gray (Gley 1 3/1).

Remarkis and Datum Used: Sample Type Th. RETaC Group, Inc. SS = Soil Sample sees W. aryn MAwr Ar-, St.. 301 Chllsgo., IL Piton: (M77) 07131 7114400 Fax: (773)~ 714-9605

1W ETc ECBoring D rng LogBoring Log Shoot I#:of DSP-158D 3

U Prowect Dresden Power Station Project 0: sXENW-18513-320 Client Exelon Nuclear 1Drill Rig Type:GuC Method:

Pech GP.750C Bit Type: 8" & 6" Air Hammer

-Location: Dresden, Illinois Northing: 8448.08 EaslnrgW.15934.92 Ground Elevation (ft. meal): 507.79 Contractor. TSC Boring Diamneter. Total Depth (ft. bgs): 135.00 Start Date: 02/25/2005 Backfill: Bentonite Chips Logged By. Torrey Morris Finish Date: 03/03/2005 Compleison: ChedKed by.

Sample Method: Depth to Groundwater.

Samnple .

Soil and Rock Description

& N~abe, tse'l ~Classification PO Scheme: LUSCSIASThILM TOPSOIL" Topsoil, soft, moist, black to dark brown (Gley 1 2.56/).

CLAY: Sandy Lean Clay, moist, soft, light - 505 yellowish brown (2.5Y 614).

5

- 500 CLAY: Lean Clay. hard, moist, dark gray (Gley 10 1 4/N), some Limestone pieces mixed in clay.

LIMESTONE: Umestone, very hard, dry to wet, 495 light gray (Gley 1 7/N) to gray (Gley 1 6/N),

crystahine, fossils can be seen In larger 15 cuttings.

-490 20 485 25 480 30 475 35

-470 40 Remarks and Datum Used: Sample Type The RETECGroup, k. SS = SOilSample see5 W. 13" M- A-, Ste. 301 Chi-a., K.60631 Phone: (773) 7144900 Fox: (M 715-9050

Remarks and Datum Used:

Th. R=TEC Groap, Inc.

8805 W. Bryn Maswr Ave. Ste. 301 Ch*ao, IL BOO31 Phone; (773) 714-e99W Fa-. (773) 7t4-6005

Remarks and Datum Used:

Sample Type S - Soil Sample Jk. The RETEC Group, Inc.

6606 W. B/ry Ma-r A'm. Sto. 301 cgo, IL 8D031 "lllr*F..; (773) 714-9805 I -

Boring #: DSP-1595 REEcBoring Log ShoetI of I Project: Dresden Power Station DrillRig Type:Gus Poch GP-750C Location: Dresden, Illinois Project #: EXENW-1 6513-320 Method: Northing: 3962,1 Easting: 14862.98 Client: Exelon Nuclear Bit Type: 3 114" ID Auger Ground Elevation (ft. msl): 516.27 Contractor. TSC Boring Diameter: Total Depth (ft- bgs): 16.00 Start Date: 03104/2005 Backfill: Bentonite Chips Logged By-. Torrey Monris Finish Date: 03107/2005 Completion: Chocked by:

Sampl*e Method: Depth to Groundwater.

Sample .

Sm.pe. Sail and Rock Description E Neumbr ) --

Classification Schema: USCS/ASTM sL u FILL: Fill

...

515 510

- CLAY: Sandy Lean Clay, soft, very moist, yellowish brown (10YR 5/4).

-10 LIMESTONE: Limestone, hard, wet, white (5Y 505 8/1) to gray (5Y 5/1), crystaline.

I1 RemarkS and Datum Used:

Sample SS - Soil Type Sample Tho RETEC Greop. Ino.

0806 W. Bryn MaWr Ave, Ste. 301 Chicago, IL 60631 Phone: (773) 714-.900 F..: (773) 714-5800 K)

R BorBoring #: DSP-159M

.11 Ec Boring Log Sheet 1 of 1 Project: Dresden Power Station Doll Rig Type:Gus Pech OP-750 Location: pm.*den. Illinois Project #: EXENW-18513-320 Method: Northing: 3969.14 Easting: 14863.56 Client: Exelon Nuclear Bit Type; 6" Air Hammer Ground Elevation (ft. msl): 516.23 Contractor. TSC Booing Diameter: Total Depth (ft. bgs): 59.30 Start Date: 03/1112005 Bedckfli; Bentonite Chips Logged By: -TorreyMorrnleRandy Mackay Finish Date; 03114V2005 Completion -Checked by:

Sample hilethod: Depth to Groundwater*

Samplempleetho SBackme J

Soil and Rock Description E

&Numnber&Ntor PPO (-m

=1e 15ntvl= (D a e Classification Scheme: USCS/ASTM S~ L) i * *, FILL: Filll 510 5"

5 510 CLAY: Sandy Lean Clay, soft, very moist.

.enowish brown ('DYR 5"4). 505 LIMESTONE: Limestone, light blueish gray (Gley 2 7/1), with white (Gley 1 8/1) speckles, 1texture is nierocyystallne to fine grained, 5Do cnoable, dry smaIl Shale lenses thoughout dark biuieih gray (Gley 2 4/1) to 20 pale green (Gley 1 6/2), fractured, pyrite stringers 25 - L490

~30 3 485 35 40 -* 7 455 4-470 50

] "460 SHALE: Shale. hard moist to very moist, gray (ley 1 10Y 5/1) to very dark greenish gray Gley 1 3/1) when wet, slightly fractured to fractured, conformable, strong, mlcrocrystallne, uniform, fresh, competent, shear, undulating to planar, clean, pyrite nodules.

Remarks and Datum Used: Sample Type The RITEs-rourep. lee.

SS = Soil Sample B605 W. Bryn Mawr Ave. 30I Chlcago, IL 80631 Phone: 1773) 714-1400 Fax: (773) 714-9505

I&*RETIEE Boring Log Boring #: DSP-159D Shoot I of 3 Prolect Dresden Power Station Drill Rig Type:Gua Pooh GP-750C Location: Dresden, Illinoli Project II: EXENW-1B513-320 Method: Northing: 3978.34 Easting:14863.76 Client: Exelon Nuclear Bit Type: S" & 6" Air Hammer Ground Elevation (ftL msl): 516.32 Contractor TSC [Boring Diameter. Total Depth (ft. bgs): 137.00 Start Date: 03/07/2005 Backfill: Bentonite Chips Logged By: Torrey Morris/Randy Mackay Finish Date: 03/1412005 bCompletion: Chocked by:

Sample Method: Depth to Groundwater:

S p Soil and Rock Description E Typ-ebe TA dl pelsanperal(ý Classification Scheme: USCS/ASTM i a L _"

_ FILL: Fill 515 510 CLAY: Sandy Lean Clay, soft, very moist, 10 yellowish brown (1OYR 5/4).

LIMESTONE: Limestone, light blueish gray 505 (Gley 2 711), with white (Gley 1 8/1) speckles, texture Is microcrystaline to fine grained, conformable, dry, small Shale lenses 15 thoughout dark bluelsh gray (Gley 2 4/1) to pale green (Gley 1 612). fractured, pyrite 500 stringers50 20

- 495 490 30

-- 485

-- 35 480

-40 475 Remnarke and Datum Used; Sample Type The RETEC Group. Inc. SS = Soil Sample

$e605w. Bryn M.wr A.e, Ste. 301 Chcsag., IL BMf31 Phone. (773) 714-0900 Fax: (773) 714"0605

Boring #: DSP-159D

___ __RE__c Boring Log Sheet 2 of 3 Sample C Typ N

Ty e "k-l I o rounod

Soil and Rock Description m C IS I

6 I I

E E

a ubr 't pi p.) 0!5 Classlllcation SChteme:

USCS/ASTM 8~~I PIP ~n~p__

_______________________________ .1-oilWil

- 45

. 470 aW18150 465 55

460 I0 60 SHALE: Shale, hard moist to very moist, gray (Gley1 IY 511) to very dark greenish gray (Gley 1 3/1) when wet slightly fractured to fractured, conformable, strong. -455 microcrystallne, uniform, fresh, competent.

shear, undulating to planar, clean. pyrite nodules.

65

.450 (K.I 70 NOV., .445 75

. 440 80

- 435

-85

- 430

- go

- 425 Remarks and Datum Used: Sample Type The RETEC Cresp. Inc.

SE Soil Sample 8605 W. Bryn Mewr A-., Ste. 301

)

Chcagoo, IL 60631

( Phone: (773) 7t4-9900 Fax: (773) 714-9605

Boring #: DSP-159D ilailREnic Boring Log Sheet 3 of 3

-Sample Soil and Rock Description Type ,nwd

.Aabc"k- Plo I Pf IPPnI) op em~~

Classiflcation Scheme: USCS/ASTM [2 L 5 I, EME ft 1,=-T 95

'420 100

415 105 410 110 405 115

400 120

395 DOLOMITE: Dolomite. very stong, very light L125 gray and light gray (mottled), microcrystalline, vuggy, some subhorlzontal fractures, (- tloot intervals), vertical fracturing from 132-135.5 390 feet and 137-138 teot.

130 385 135

380 Remarks and Datum Used: Sample Type The RETEC Group, Inc.

SS = Soil Sample 8505 W. Bryn, M.wr AMe, St.. 301 Chlago., IL 60631 Pho.: (773) 7144900 Fax: 1773)7t14*-a05

(5) SL RETEC Project Name HydruGeologlc Assesment Monftoring Well No. DSP-149R Project Number EXENW-18512-312 Date of Installation March 31, 2005 Drilllng Cormpany Testing Service Corporation gTSC)

Field Engineer Torrey Morris Flush Mount n of Top of Rfaer Pipe 518.29 ft mSo 4 inic Type of Prole.v C.as Steef Ceooma

- D. of Riser Pipe 2 Mch Type of PRoo Plpe 2 Vvch Schedule 40 Flueh Threaded C..hvn (PVC)

- Dioete. of Elorefo,Ol 6 inh Type of Baoflth aentonhe DGoud Depth toTop of Beal 29 ft bg.

Typo of Seal 31 rec B~eeoronkeChdpu Depth to Top of Sandpaok 36 feet b Soa Tyoof SendapaoO102 Colorado Slfloosm Depth to Top of S-en 40 I boe F.D.of Wel Screen 2 footh Type of WeO S0een 2 Incc Schedule 40 So.

0.010 0 ýPht00 Thread (PVCP

-Depth to Bottom of Scretn 50 IFb*.

Depth to Bottom of Sedimentl T-e 50.5 ft bOO Depth 1010Bot0om of Borehole 51 RIbg.

NOT NOI) TO SCALE CL

PRETEC Project Name' HydroGeologlc Assesment Monitoring Welt No. DSP-157S Project Number EXENW-1851 ;-312 Date of Installatlo no February 25, 2005 Drilling Company Testing Service Corporation (TSC)

Fleld Engineer Torrey Morris Rush lMourtt Etevaelon ot Top of Riser Plpe 521.54 Rt-1 I.D of Prrtedte C a001 4 tnch Type Of prorate Casin stew Casing I.D. of RJisr Pkpe 2 tool, Type of RiW Ptpe 2 Inch, SoedVWI. 40 EkeS C)

Th,...I.d C-ig (PVC)

Dia~meter of B0.0501. a inch

- Typo of eoolrfl 3/3 kool eofonrh.Chips

- 0ept.h 6 TOp of S4e1 sado

- Type of *est 5 IceS 3M h nkocli Chip.

Depth to TOPof ronm"ol I feethes.

Type of Soorrkreo IOXM2 Coloredo SiblanSonSd Doept to Top of Somen 2ttbg.

I.D. of Wea Scrum 2 Inrt,

'type al We# Screen 2 Inch Schtule 40 Screen 0.010 S&ot Ftmh Thmad (PVC)

Depth to Bottom of stwaen 12 It bg$

Depmt to Bottom of Gedt*nt Ton 12.5 ft bgo Depth to Bottom of Borehole 13 RIbag NOT TO SCALE K)

OPRETEC Project Name .HydroGeologicAssesment Monitoring Well No. DSP-157M Project Number EXENW-18512-312 Date of Installation February 21. 2005 Drill*ng Company Testing Service Corporation (TSC)

Field Engineer Torrey Morris x Flush Mount aflom of Top of Rlisr Pipe 521.10o ft fro o.0,of protocivo Cambrg 4 Inch Type of Prowctien Caosing Stol Coo"ng

- .. of Roor Mop. 2 Inch Typo .1 lPse Ppop 2 Inch ScheIIO 40 Flash Thm ded ý:;; VVC DiOameter. of Borholo a innS Typo Of eoddM Benot~tl GrorSI DepthtloTop of Seat - 33ftbus

- Type of Seal 3M inch Bordproll ChpS Depth tn, TOPof Sasndpack 152 35.5 fesol 5g.

TyeofS-onpockirx~ Cotorads Sills. Sand Depth1 to Top of Sao- 3a of beg I.D. of Woll Scrson 2 Inch Type of Well Saoroo 26511 ScdoUlo 40 Saren 0.010 Slot Fl`sh Thread (VC)

-Depth to Beottom of Sagoer 48 it bgs

-Depth to Boom51of Sedime~nt T-a 40.5 ofbog Depth to Bottom of BomhoW1 53.76 ft bgs NOT TO SCALE

S- RETEC 0 Project Name -dromOeologlc Assesment Monitoring Well No. DSP-i 57D Project Number EXENW-18512-312 Date of Installation February 25. 2005 Drilling Company Testing Service Corporation (TSC)

Field Engineer Torrey Morts Flush Mount 521.80 n mts) 4 lecdi ,

Type of Ptotevl" Casing Stal Casing

-U

.D. of RIer PIpe 210011 Type of Riser PIpe 2 ilrlh Schedule 40 Flush Theaded Cooing (PVC)

C')

Dioameterof BOvodhole 8 in0h (0-60 II)tB indh (50-130 ft)

- Type of Bela epth - 114n.2 t11 tgs TypeOf Stos 3M0k1h Bentorsite chips Depth go Top of Sandpack 118 feetro0 -

Type of Soandpoi*t 1D.20 00)0,500 55o 5Sand Depth to Top of Sureen 120 it 500 1.D.of Weo Somse 2 InCh Type of Wall Sceen 2 inch Scheduke 40 Seseen 0.010 Slot Flush Thread (PVC)

Depth to Bottom of Screen 130 ft b05 Depth W0Btitom OfSedimnt~a T- 130.5 ft 500 Depth to Bottom OtBorehole 130.5 fitbg NOT TO SCALE Remarls: To conlflm the lowerf 2qu0 r from the upter aqutler duting drilling, a 6 Inch IQelse) csitg wa placed 0own I I from 0 to 50 feet bgs (tol of shale layer). then Ste outside w hole sealed wlih benonite grout.

OPRETEC Project Name HydroGeologic Assesment Monitoring Well No. DSP-158S Project Number EXENW-18512-312 Date of Installation Marcih 4, 2005 Drilling Company Testing Service Corporation (TSC)

Field Engineer Torrey Morris Flush Mount itll ofeeop of Riser Ppe 510.70 R ..ol 4 1,100 Type ol Poteciove Casng ste" Casing 1i

- 9.0. of Riser Pipe 2 irch, Type of Riser Pipe 2 11.11SdohdO 40 Flush

- mete" of ewo .ole

- Type of 0sc,11 316 los Beneonite Chips Depth to Top of Seal aet 1 Type of Se" 510 lhch Berftollll Chips Dept, to Top of SaelPadk i feet bq.

Type of snadpswc 1052 Colrdo, Sl0ca Sando Depth to Top of51055,, 2 it bt.

ICLof Well Soreen 2 lrmh_ _

Type of Wel S- 2 Irci SO~duie 40 S0reen 0.010 So P10;5 Thread (PVC)

Depthtof Scacml2 Bttom it 1,9 Depthl to0110 S.Wo Sodlo,.,

T-re, 12.5 ftbp.

Depth to 010,,, 01Oceble 13.011000 NO'T TO SCALE K) OC

OPRETEC (IJ Project Name HydroGeologlc Assesment Monitoring Well No. DSP-168M Pro*pt Number EXENW-18512-312 Date of Installation March 2, 2005 Drilling Company Testing Service Corporation (TSC)

Field Engineer Torrey Moris

[7x Flush Mount

ta'nd ofaT op of RIas, P"p 610.64 I rend

.. ol PmaaDk~wCastng W 4 sir Type of ProtecOve~ Cmsin Stem c.5105 2 Wvot 2 Wvil SoheduL. 40 Flush, J)

Threaded Co (PVC 6 lookh 13.0h,14. U.NA and F.rftnd C-to Tp Deppth & r-W 41 It 1, Type of Seat 3/8 ir~shBerdoni. Chip.

Depth t. Top of Sen0p45k 43.s feet boa TYPOOf SUFKdp~ao MOO0CotWrdo SlIM Speld 466f bo 2 kIr 2 kxll Sdmed~fe40 Saeý 0.010 Slat P10.1 Thred (PVCi 561t ba.

56.5 ft55 57.5 5585g NOT TO SCALE I

V RETEC Project Name HydroGeologic Assesment Monitoring Well No. OSP-158D Pro)ect Number XENW*-1B512-312 Date of Installation March 3, 2005 Drilling. Company Testing Service Corporation (TSC)

Field Engineer Torrey Morms z Flush Mouta Elevation of Top of Riser Pipe 510.39 ft w,0 D.0of p.*e-."- callig 4 Inch TyPe of Pm*AS.0- Coat Steel C.ong U).. 01Rlee Pit- 2 I..h Type cI Riser Pipe 2 Inch ShadlaO 40 Fluth Threadted Casino (VVC)

Diameter, of Borehole a Inch (0-s7 ftYGwh ,9 (57-13s mI T--ype0 Boddtt 9,000.01 Grout and Portland CeefI mix 1

Depthto TOPof Seat 12 ftboa

- ype1of(Seal 3M5Inch entloolteChipis Depth, to Top of Santdpila 123 feet IPM Type of Setelped 1002 Colorado Mr.s S"o Depth to Top of Sozrson 125Mt bee ID..1 Wall Sceen 2 0101 Type of Wel Solween 2 Inch8011.401.40 Screeno 0.01180W'ol lsh Thread (PVC)

Depth to B0otom of Screw 134.5 it bs Depth to Bot of Stedrrnont T- 136 ft bgs Depth to Bottomnof Borehole 136 ft boa NOT TO SCALE IFt-nost: To itns the .0 aqttite, It-o.0 t pp.e quit.00,durin~l db1bin, . 5 in~h M08.1- wolng ."e pl-dg hobo J - from or.1 0 57 feet 1,.s (t.o .t h(1l. I-0n. than the 0.9080 -4 .. old 0401be-sne 0,8oontl0 ndoke -- net mto..

O -RETEC kJ Project Name HydroGeotog)c Assesment Monitoring Weln No. DSP-159S Project Number EXENW-A8512-312 Date of -nstaliation March 7. 2005 Drilling Company Testing Service Corporation (TSC)

Field Engineer Torrey Morris VRFush Mount 510.44it met Ebovoton of Top of Riser Pip.

- LD. of PmtUCt0e Casing 4 Inch Type of Protective Casing steem Casing

-ID. of Rise, Plop 2 isotr Type of Riser Pipe 2 loh t edl 40 Fluah

........... ?,*. -wf

- Diaot.le .1 Borehole

-Typte of BaciSIIU 260 Inhr bentoele Chips

- Depe to Top of Sea Type of Bn*edt 5 R toelt Chips Death lu lop of SandpeoI . feet opG

-Type of SendPod. 10020 Colorado846-ao Sand Depth to Toe af oreen 5 ft bgoo Wn.of We6 Scre 2 i*nch Typo Of Well Sente. 2 thca Schedule 40 Scgew 0.010 &oot Flush Thraed (PVC)

- Depth to Bottom of Sucms tI fto .

Depth to Bottom of Sediment T- t e 1 5 05it 10o Depth to Bottom 0f Borrnooe 16 ftbg.

NOT TO SCALE

'K~)

S-VRETEC Project Name HydiroGeologic Assesment Monitoring Well No. DSP-159M Project Number EXENW-18512-312 Date of Installation March 11, 2005 Orilling Conpany Testing Seice, Corporation (TSC)

C Field Engineer Torrey Morris Flush Mount atloaof Top .4 Rlw Pope 619.376f 51 of P*otdcv C..kg 4 Inch Type 04 P.otedlo C.hSg St.e. C...g I.D. of Rlser Pipe 2 lhOP K, Type of Riser Pipe 2 inch Schedule 40 Fleet, Thrmoded Cas (PVC) 010515. 160"..hoew 6 kich Type of Backfill aetmor*te Osou Depm to Top o5.0" 43.75 Rbft Type .f SBet 31 inchhenthrie Chloe Depth to Top Of Sarelpaoo 46 fet bos Type of SandP* 10201 Colorhdo SIIB- Sand DphtoTop of Snehs 48 ft bqs 1.0. of Wet ScnteI 2 Inch Type of Wetl BSomn 2 inch Schedule 40 Sees,,

0.010 Sliu Flush Tbelf d (PVC)

- Depth to Bottom of Sores, 5611tbps Depth to Bottom of Setdiment 511.5ft bgo Depth to Bottom of Borehole 50.3 ftbgs NOT TO SCALE

OPRETEC Project Name HmGeologl; Assesment Monitoring Well No. DSP-159D Project Number EXENW-18512-312 Date of Installation March 14, 2005 Drilling Company . Testing Service Corporation (TSC)

Field Engineer Torsy Morris FlRush Mount I-ELov~ of reo lo~p I.D. of Protectiv Caftn 4 i*t.

Type of P09.0*100 C00lng steol C."tn

-J I.D. of Moor PFp. 2 b61oh Type of Riser PIpe 2 ln~t* Shf.00u. 40 Flush Threaded Cý$Ino (PVC)

- 01Diarrteof Behole 8 inxh(0-006. 410* 60-137 R1 Wm Typo of B6ck'il, Bootonft 0,0. and

,--- csvviý,t DOpth W Top of S2al 6y.

122 it Typo o*.. 1l 3/M irch Eontonito Chips Depth 10 Top of Sindpook 124 feto bgs Type of Sadpa;Ick 10x20 Cok-ldO Silos Sand Depth to Top of Soronn 126 If bU.

I.D. of Wal Sooemn 2 1001 Type of WeO Scroon 2 I1c Schedu.1 40 Screen 0.010 Slot Flush Thread (PVC)

Depth to Bottom of Scr/eon 136 ft Wego Depth1 to Bottorr, of SodIrnw,1 Depth to Bottom of Borehole 137 Iiboo NOT TO SCALE Romer":~n To oonflos the ipner aquifer 6f.1m0.6 upper aquifer during*11100g, 8104wh ID steel91.14.6wa pl8608 down h,0.10. 61om0 top 601,9 ltop Ofohs*1 Waro). then 0he0.00180waoa.

oo saled with abontonite 0,0019and poritail1 -enlnt nib,.

AIRETEC Project Name HydroGeoioglc Assesment Monitoring Welt No, W-2R Project Number EXENW-18512-312 Date of Installation November 23, 2004 Drilling Company Testing Service Corporation (TSC)

Fied Engineer Randy MacKay Flush Mount

-1,0. oFPro.Nt0v C..fg Type of Protootv Cahng 2 toO, Type of Riser Pipe 2 lnot Sorroule 40 Flush,

... .. . P. w " 1 " --

- OWotre of B.ohol .opproomoty 12 Oldi

- Typ. .0 Batcle1 BSontent 0r0-A Dpth to Top of SMIl 05 Rbg Tye of S,1t Bootonile ct'd..

Dopt, to Top of Swncgad 365tot bes Typo of Senapoel Silos Sand oepth to Top of Saooo I.D. of Wel1 sren 2 I"oh Type of l SroWa en 10 slot PVC QvthtoBoto of0S ~ tt.5 ftbo Depth to Bottom1OfSedImoer T-n fbos f.5 DepMt to Bottom of Bortihate 41.5ft tbgo

ý(7) NOT TO SCALE

'OPRETEC Project Name HydroGeolo1gc Aseesment Monitoring Well No. E-8 Project Number EXENW-18512-312 Date of Installation November 23, 2004 Drilling Company Testing Service Corporation (TSC)

Field Engineer Randy MacKay vFtash Mount

-Fk0.,Kotn of Tap. aMee Pipe __________

- .0. f1P-at.oI CooIng 0 101 Type@ at P7010G0b0Caving Flu01no.,,

-I.D. ( ls0r Pp. 2 W04 I-)

Top. of RAo. Pipe 2 khd Btdot.%40 Fk01 Th-.Od~d Caing (PVC) a..ka Typeof BBC* aorgoto (0100 Cý.o wt pad to set Push000o-A vo011 Depth, to Top of Setoo 0at bo.

Typeof Seel. B0nt-ft. Chipm o.Me Ib tap at r..odpak Typ, af Serwipaek Sits. Soad Dept to79p oape S-~o 2.5 ft b1*

I.D. at Well acreen 2 Inch Type of WontSceoý 10 wlot PVC Depth to Bottom of Sceetn 6.4 ft bgo Depth to 0tattaa Of Sed<*toen 5.4 It bt.

Depth In B~ottaOf 01eabtlab 0.4 17b*1 NOT TO SCALE (C.)

SVýRETEC C)

Project Name HydroGeotogic Aasesmentl Monitoring Well No. E-9 PrMe8c Number EXENW-18512-312 Date of Installation November 23. 2004 Drilling Company Testing Service Corporation (TSC)

Field Engineer Randy MacKay Flush Mount

.1 o Top of meer Pipe Type opPmReXOCS Casing

- tD. . RIMeePipe 2 nkt K, Type p1 Riser ppe 2 kl~t Schedule 40 Flush Thre-Eted Cýkv (Pvc)

- Dtiamter o1 Boreht-, .php-httvtet) 1 tO

- Type of Backlf None DOepth to Top .4sa onei .

- Type of Saw Bantontl Chip, o gtound Strface Depth to Top of Sandeosk Ietba Type of 6-tdpook S440y. S.W, Depth to Top of Screen 2 ft Deo I.0. of Wel Soreoe, 2 Inch TyPe oWWell Scee. 10 slot PVC Diepth to ot-or of Screen 7 (1libs Depth to Bottom of Sediment Tmn 7 it bgs Depth to Bottom of Borehole 7If bgs NOT TO SCALE 3j

'ORETEC ;J Project Name HydroGeologic Assesment Monitoring Well No. E-10 Project Number EXENW-18512-312 Date of Installation November 23, 2004 Drilling Company Testing Service Corporation (TSC)

Field Engineer Randy MacKay VFlush Mount FA-Pleofle0 Top o1 Plser Mope __________

- c1Poe..kveg0lot Typeof Prokeshv Ceolo Auoln-o.,

2 Wh -

2 Inch Schedule 40 Flush C-bw (FVC)

.ppoor-1-tely 12 khlo Noh De~plthtoTop fSeal O~0 Ab Type of Seal Sentanlte Chips to ground 00,150.

T Depth Wo op of SandpadI 1,2 It bgo Typeof Seorpaok Salo. Seed 2.2 R boo 10 olot PVC 7.2 ft bgs 7.2 Ith,9 7.2 hIbus NOT TO SCALE 1.

[)

Appendix B Geophysical Logs

to

1.1 ------------------

K) I 10 20 30

0 I I -. L-J-..6-L GAMMA-INDUCTION DSP-I 49 03/16/05 A LOG PARAMETERS I

MAT*MDENSITY: NLFfiOSN MATRI;SC8MDaToNE MARI DELTAT, U MAGNE.TIC DECL: a EECT CUTOFF 1251 OFT WE~

GEOPHYSICALCORP.

century-geo.com DSP-157D COMPAN"Y DRES6EN STATION .... ...

WELL DSP-157D CO'CUNTY GRUNDY STATE I:LL LOCATION NONE C')

SECTION TOWNSHIP RANGE API NO. None 0

UNIQUE WELL ID. None PERMANENT DATUM E.LEATION KB:

LOG MEASURED FROM: G.L. ELEVATION DF:

DRL MEASURED FROM: ELEVATION GL:

DATE 03/16105 RUN NO. : I 0 DEPTH DRILLER : 131.6 o Brr SIZE 6 LOG TOP LOG BOfTT-OM

-2.90

127.30

)

CASING 00 :2" CASING BOTTOM : 136 zw CASING TYPE PVC BOREHOLE FLUID - 0 RM TEMPERATURE 0 MUD RES 1 0 SW WIlTNESSED BY : None RECORDED BY T.NEAL REMARKS I REMARKS 2 MPH ALL SERVICES PROVIDED SUBJECT TO STANDARD TERMS AND CONDITIONS

")

GEOPHYSICAL CORP.

century-geo.com DSP-158D C~OMPANY' DRESDEN~ STATION OTHER SERVICIES:

WELL DSP-158D FIELD COUNTY GRUNOY STATE ILL C)m LOCATION NONE 01 SECTION TOWNSHIP RANGE 00 0

API NO. None U3 UNIQUE WELL ID. None It) g~ I LI-PERMANENT DATUM ELEVATION KB: Lii LOG MEASURED FROM: G,L ORL MEASURED FROM:

DATE RUN NO.

03116/05 1

ELEVATION DF:

ELEVATION GL 0~

(.) 2 DEPTH DRILLER 136 0

-I BIT SIZE : 6 LOG TOP -2.10 LOG BOTI-TOM : 129.00 CASING O :2" CASING BOTTOM : 136 CASING TYPE : PVC BOREHOLE FLUID : 0 RM TEMPERATURE : 0 W

,q MUD RES :0 0

WITNESSED BY : None RECORDED BY : T.NEAL x - 159D , OTHER SERVICES:

FIELD COUNTY GRUNDY V ILL I-o STATE LOCATION . NONE SECrTiON T*WNSHIP RANGE 0c0o API NO. None UNIQUE WELL ID. I: None PERMANENT DATUM ELEVATION KS: C,) tI--

LOG MEASURED FROM;, G.L ELEVATION DF:

DRL MEASURED FROM: ELEVATION GL

)ATE I: 03116A06 Z::

RUN NO.

DEPTH DRILLER 1

137 0 S o BIT SIZE : 6 LOG TOP : -Z50 LOG BOTT-OM 133.60 C)

CASING OD :"

CASING BOTTOM CASING TY'PE :PVC BOREHOLE FLUID : 0 V

RM TEMPERATURE I: 0 MUD RES : 0 U z

WITNESSED BY : None w RECORDED BY 1: TNEAL ,.0 REMARKS 1 REMARKS 2 ALL SERVICES PROVIDED SUBJECT TO STANDARD TERMS AND CONDITIONS I)

Aj MAwi CNrrm.s 20Ri MAMNETICEýr: 0 LOG PARAMETERS GAMMA-INDUCTION EUaLJ MTI DSP-158D ADT*R 03/16/05A MATRIXDELTA T.5 eLECT CLITOEF an SIZE

GEOPHYSICALCO .

century-geo.com DSP- 159M COMPANY DRESDEN STATION DSP-159M WELL FIELD COUNTY GRUNDY STATE ILL LOCATION NONE SECTION TOWNSHIP RANGE API NO. None UNIQUE WELL ID. None PERMANENT DATUM EL.EVATXN KS:

LOG MEASURED FROM: G.L ELEVATION OF:

DRL ME-AURED FROM: ELEVATION GL DATE 031165 RUN NO. I DEPTH DRILLER 58 SITS=ZE 6 LOG TOP -260 LOG BOTTOM 64.60 CASING O 20 CASING BOTTOM CASING TYPE PVC BOREHOLE FLUID 0 RM TEMPERATURE 0 MUD RES 0 VWVTNESSED BY None RECORDED BY T.NEAL REMARKS 1 REMARKS 2 ALL SERVICES PROVIDED SUBJECT TO STANDARD TERMS AND CONDITIONS

I

,,;;;I - - - - - - - - - -

7 --------------------

10 0

0 150 0

k)l 80 90 100 110 120 130 T&;- - - - - - - - -

I- - - - - - - - - - - - - - - - - -?= - - - - - - - - - - - - - - - - - -

.a I Al IA li GAMMA-INDUCTON DSP-590 03,16105 Ai

()

GAMMA-INDUCTION iDSP-159M 03/16105 LOG PARAMETERS hAkhtX C~h3*TV 1:

NS J *MA-XS:.*1CNE MATRIX DELTAT M4 154407 C~ CI. : o 0 .005 CT.

UTO QF :IT SAZE IF K) 10 -

40 50 K) GAMMA-INDUCT)ON DSP-159M 03/11/05

LOG PARAMETERS A

A MATRIX iENIVT.

0*10EC.L DAC 0 265 NEUTRON MATRIX ELECT.CUTOFF :260

SANOSTONE MATRIX BITSIZE DELTA*

T0

a

Appendix G Mass Flux Calculations

Appendix G AJ- Mass Flux Calculations

Appendix C Site Survey Map (Not Included)

Appendix D C"" Slug Test Data

II 10.

DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:\...\DSP121-in.aqt Date: 06/02/05 Time: 13:36:18 I1.

PROJECT INFORMATION Company-, The RETEC Group, Inc.

CD Client: Exelon Generation E

0.1 Project

EXENW-18513 Test Location: Dresden Station Test Well: DSP-121 Test Date: 4/111/05 0.01 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice 0.001 K =0.0002023 ft/min

0. 6. 12. 18. 24. 30. y0 = 1.683 ft Time (min)

AQUIFER DATA Saturated Thickness: 40.75 ft Anisotropy Ratio (KzIKr): 1.

WELL DATA (DSP-121)

Initial Displacement: 2.05 ft Casing Radius: 0.083 ft Wellbore Radius: 0.25 ft Well Skin Radius: 0.25 ft Screen Length: 1Oft Total Well Penetration Depth: 40.75 ft Gravel Pack Porosity 0.2

hl.SA/~wro .~0611pm P10000. 04703/2000wo 14:11=0 R.oO.l 000 000 ..080120022000-04-11002044 OSP.121 /0 00,-000 V..0;00 4.81 o00w 100000 12002 P010.. V..0/o 3.09 040011 30-,. ,,*40LL T."t .b: OSP-121 k, 7nt 4.4-d0 08 411/200 102243 T" M~0040 04/1 1/2008 106=:44 TomO s000ppod/A N/

Dola gol.rOd 00,00.001001M1.40 601.08.0 01, 000./00000 0000S 8006/4

"/00.a td 4000 .0. W" lie TOTALDATA.S66000.0: III M001..00 Ill-to"

-t.. -:

000.100 oo08w 30 00/0.

L.tM0d0-Ek..S0' M0400.

U- 00.d

ý 0/100 11.0.000040 20.742 Fool120 0010104000.0t 4 Chm*K*'2 Dý Tý T FýH200F11 04/11/2000 00,11,2000 16=-3:44 102:24 0.3 0 -1.004

-2.023

()

0441V2000 00:44 0.6 .1.033 04/11/2000 t023:46 0.0 .1*7 04/11/006 10t3:40 1.2 -1.04 04/ 1/2000 ,01:.4 1.5 -1.607 o4/v/200 1M2340 1.0 .2.000 04/11/f00 10:23:46 2.1 -1,091 04a* 20 1M23:40 .4 -1.734 04/11/owl0 10:23:40 2.7 -1.001 04/W1/0.6 16:2347 3 -1.7?

04/1/2S00 10:23.41 3.3 -I.M 04/11/2000 1:-3.47 3.0 -1.052 04/11/20*e0 0:23:40 3.0 -2.00 04/11u/20 10:2:4 42 -1.1.0 04/11/r2000 10:23/40 4.0 .070 04/11/2000 10:23:40 4.0 -1.9" 04/112 18:23A4 5.1 -1.03 04 M 1/2000 10 =:'40 5.4 -.1.22 04/11/2000 10:23:40 0.7 .1.001 04/112005 18=:2350 -1.44 0411/2000 1230'0 0.4 -1.0"1 1/200 0:23:51 7.1 -1.762 04/11/2000 10:23:61 7.5 -1.6.1 04/11/20 10:23:52 . .1.001 04/11/2004 10:23;:2 0 .1.003 0411/2r00 10:23:63 0.4 -1.890 04/11/2000 10:23:03 0.6 -1.001 04/1/2M000 10:23/04 10 -1."

04/11/2000 1:2:0 I1.0 -1.67 04/11 t0ri 10.:2306 1t. -i16.0 04/11/2000 10:23:00 11.0 -1.004 04/ 1/2000 10:23:00 02.0 -1.5000 04/ 1r/200 1:223.07 10.4 -1.004 04/11/2005 1023:68 14.2 .1.660 04/11/200 1-23:69 10 -1.6"0 04/1/12"00 G024:00 10.0 -1.0-7 04/11/2006 04/11/200 1G.24:01 10:24:02 10.0 17.8

.1.660

- ."4a .1((

D0SP-121MnJ

ChM2)

Dal. 1`11- ET(,S Fo 420 owl1-JO le1:24-.03 te.9 :,I=0 04/11/2006 1024:0 20 .1.42 041 1112006 16:24:06 224 -1.,42 04o11,2006 1.24:00 230 .1.'4 D411l2056 16.24:00 25.2 .1.03 04/1112005 10:24:10 26.7 .1.03 "411112005 16024:12 2802 .-. 02 04111/2005 16:24:14 290 -1.025 041 12000 1W:24:15 31.5 .1.021 04/11M2006 10,4:17 22.3 -1.019 0411112000 1:24:19 352 -1.017 041119OG 1a24-21 27. -.1.01 041l(2006 01624:"0 30.0 -1.00 0411,2006 102.420 41.0 .1.40 04/111(206 10:24:20 44.3 .1,509 04/110005 10:24:31 40.. -1.000 O4V111005 1824:I2. 49.7 -1.,62 04/11m2000 102424 52.0 .1.600 0411t12000 10:24,0 65.7 -1.602 041112006 1AM4:4: 60 .1.Z64 04/11(2006 1024:40 02.6 -1.06 04/10(2000 1024:60 60.2 -¶503 041111*20 18:24:54 70.1 .1.571 0411112006 16:24C5 74.3 -1.067 04(1112006 1625M2 70.7 -1.542 041112000 46:26W7 83.4 .1.04 0411112006 1020:12 00A -1.62 04/110606 162:2517 "2.7 -1.51 04"11.2000 ¶0262 00.2 -z.I13 04l111l200 10:2&2 106.2 -1.501 04/1112600 16:20."5 111.0 -1.401 04,1111200 10:26:42 118.1 -1.441 04(1112006 10:26:0 126.1 -1472 04(11/200 1-26:w6 a0. I..§0 04ý1t0 102*0:0 1.40.5 -. 440 0411(2006 10:20:10 141.0 -1.410 04111200 102022 ¶07.0 -1.422

-4.1112000 10:2021 67.2 .1.

04(11'2000 10:26:41 177.2 -1.200 04/11(20 I0:2 :02 107.8 -1.370 wi 12'01" 1-27v.3t* I" ml3*

64112005 10:27:16 21069 -1.207 04/1l12006 1020:2 201.0 -1.321 04(1112000 10:20:10 220, -1.674 04(1(2000 10;26:42 200.4 -1231 04(111600 10620.00 310.2 -t.2 04(1100~ 10-:1292 2040 .1.-214 04-1112006 10202 270 -1.123 04(1112006 160:220( 000.4 .102 041111206 16:20:08 352.1 -1.004 04(11(005 10:2Z1:11 0472 -I.021 04/1112006 10:21:20 47. -1 04(1112006 1G022:m 002 W,007 04(112006 1532.20 631.0 .0.1 0411112006 10:3107 602.6 .0A50 04(11(2006 18:33:41 67 -7.DW 04(11=00 1024:16 02-2.6 0.105 04(1112)006 04(11(2000 1.036:0 10:30:10 0.10 62.12, -0.1770

-0.160 04(1112000 10:3024 970 ,0.730 04/111200 10276,40 40*.2 .0.0.04 04(1112005 00(11(260 10:37".1 16202 t8*1:6 ?"0.a

.41 -.07

-00,*4 04/11/2006 04/1112006 0

'0:a 10203718 0.04.2 0760. -.0-.400 061 04(t*12000 t1:0:34 810.4 -0.410 04/11*rZq*5 t8:39:31 947,6 -0.51 4(1112000 16':42:20 112,.0 -0.200 00/11(2006 10:41:27 10.634 -0.416

" 11/20M 15":4230 1121 6 -Q.3M 041iirý"0 16A43,37 1 193.6 "0.313 24/11(2066 16:44:40 1204.4 -0.202 0_(111,200" 10:4"02 1335.. -0.200 041112006 l:47?;23 1410 .0.169 K0)

DSP-121 In1 Paqe 72

10.

DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set C:\...\DSP140R-in.aqt Date: 06/02105 Time: 13:36:55 1.

PROJECT INFORMATION Company:. The RETEC Group, Inc.

Client: Exelon Generation E Project EXENW-18513 0.1 CL Test Location: Dresden Station Test Well: DSP-149R Test Date: 4/11105 0.01 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice 0.001 K = 0.0004589 f/min

0. 4. 8. 12. 16. 20. yo = 1.998 ft Time (min)

AQUIFER DATA Saturated Thickness: 49. ft Anisotropy Ratio (Kz/Kr): 1.

WELL DATA (DSP-149R)

Initial Displacement: 1.76 ft Casing Radius: 0.083 ft Wellbore Radius: 0.25 ft Well Skin Radius: 0.25 ft Scfeen Length: 10__ft Total Well Penetration Depth: 49. ft Gi nvel Pack Porosity: 0.2

-C--

MWlTrolPro (C

04/13/2006 1407.2 R01501 ft-. b.: ...*S112002 2305-04-11 100530 08P.14-R in..in W-S101Von0(00 8.,w ntattoo.- 125W2 P0000/ V140 3.00 Tatt a'aa.: OSP-149R bn 041 1W200W 14:58:03 Taml0~00 0 0411125005 15:00:2 MA WA 6

Moo..= n 0000."401 L p0f: 00 .000 113 TOTALDATASAMPLE.S 113 Ca.r.0 aml- (1 Ch-.W'1/0 8o...W -1.01 30 PS(12 P01.0000 -

Pmow.041.l000 To, 0 F..l /10 11.150 F-IH/20 Ch0021 KYl 030 hs ET (.o) F..1 Kzo 04/1112000 10.0:30:* 0 0 0411112005 15:0I:30 0.3 -0,)13 04/1112000 10206:31 0.0 .0.214 04114,2005 160:0"2 0.0 -0A 04/11/2000 1505: I 1.2 .0.442 04/1112000 15.W0:32 1.5 -0.302 04(1112005 15 0:23 1 0.11.

04/1112050 15206:22 2.I 0247 04/11/2006 10205:32 2.4 -0.174 04/11I200s Is5:013 27 .0.200 04(1112005 10:0:&23 3 .0.202 0o/11(200S 16:00:22 32. -0.d3 04/11/2000 10:00:20 36 -0.127 04/1112005 15.1054 5.0 0.473 0411(2500 1000.-4 4.2 0.C001 04/11120005 15.121 4.5 .0.000 04(1112000 10123125 48 -.0,8 04( 11125 1500:30 0.4 .0.051 04/1112000 512;020 04; -0.001 04(11,2005 15005036 5,7 .000 04/1112000 100020 00 .0.006 04/111200" 10:00.7 .7 -0).000 04111,20W 105.07 7.1 -0.006 04/11/2005 10:05:20 0.4 -0.050 04/111W000 10.12,420 0.9 .0.002 04(1,11000 16016:40 0.0 .0.000 04111/200 15:06;40 10 ,-069 04"1112006 15061:41 10.0 .0.053 04111r20005 15:00:41 11.3 -0.047 04/111/2000 10,.:42 11.0 -0.045 04111/20005 15:0043 120 0.042 0411120*0 15.06:43 13.4 -0.030 0,1l 2000 10:05:4. 14.2 .0.02 04Mlll2000 16:0s:46 It .0.020 04(111200 105:46 15.9 .0.022 041112005 .5:05:47 10-.5 -0.10o 04(14(23005 NG6:04: 17.0 -0.012 OSP-14 *3 .x00 Pace I

Dal. IT. ETU(-) F" "&20 j 404111=005 ¶150646 18.6 40.004 0411 1.2006 15:05:60 20 -0.002 0411112006 15:0641 21.2 0006 041112005 15:063 22.4 0.90 04/'1 12005 15:0.05 3.0 0.517 041111200I 15:00:50 20,2 0.023 041112005 15:00:57 26.7 0.020 04/11/2005 1500:50 20.2 0.037 04/11/2005 I6 0- 25.9 0.044 04/1112000 16020.2 31,5 0.062 04/11/2006 t1:01203 33.3 0.004

04/11r06 16000, 5.2 0.068 04o1112005 15:,G207 31.3 0.078 04/111r200 10:06:10 50.6 0.006 04.1112006 15:00:12 41.6 . 0.006 04/111/200 1i26:t14 44.3 0.107 00/112006 15:05:17 40.09 0,11%

i4/111205 1606200 46.7 0.131 0411110*0* 16:00:23 2.6 0.144 04/11/2006 ls106-6 56.7 0.167 041111o006 1120*62; 5 0.10" 04/111r2006 15606:2 02.0 0.194 04/11/2005 11201."20 50.2 0.150 54/11=005 1506:40 70.1 D.213 04411/200 15:06:44

" 74.3 0.251 04/112r00 150.:49 78.7 0.249 04/11/2006 15:0043 0M.4 0.266 04/I I/2 1606:60 50,4 0.206 O54/112005 15:0700 03.7 0.300 o04/112006 15:070 00. 0.327 04/1112.000 15:07:16 05.2 0.549 04/11100oS 15:0722 111.5 0.374 04/11/ 1607:20 118.1 0.370 04/11/2005 16:07035 125.1 0.423 04/11/2000 15:07:43 13Z2 0.446 04/1 12000 15:07:51 106.6 0.476 04/11 2006 15W07509 148.9 0.604 04/1l/2005 15Z606 157.8 0.533 04/11/2006 15006:17 /07.2 0.064 04111M,200 150 67:37 177.3 0.6 04/11/200 106-4 il.0617 0 )F D4/11/200 1o I6:30 . 107.0 0.620 "4k11.*'N130 16,08:4!) Ise 0O0W1 04/11'2000 156:0:1 210.9 0067 06/11/2P00 1506:14 Z23.5 0.704 04/1112006 1600927 368 0a771 04/1112000 16:01.41 25009 0.009 04/11060 '60.5 2608a 000 04f11'2006 10-10:12 201.6 O 04/1112000s 0 11,22 2M.4 0001a 04/112005 15:10 46 316.2 0.072 04/11/2005 15 11:00 325 1.016 04/11'20 15W11.25 30l4.0 1.004 04/11/2000 15,11:46 a3l 1.103 04/11/f006 10512.00 3004 .140 04w11'05 1:012:32 4272. 1.160 04/11,2005 16Z.107 447.2 .230 04/11/2006 10:1024 4M.5 1.26 04/1112006 #5:1302 502 1.332 04/11irO0 15:/.On 521.

M 1.377 04/ 1/2006 15:14.64 603.5 1.424 04/11/2000 15:11:27 607 1I4=0 o4/1V1,005 10:16:03 832.5 1.618 o,,"111005 15016:4G 670.1 1.

04/11/M006 15:17;20 7069 1.702 04/11/2006 15:1:.02 702.1 1.640 04 11/2060 15:16:47 790.5 1.501 04/112005 15:19.4 544.2 1.731 04/111t2005 1520:24 004.4 1.709 04/112005 1521:10 04T.6 1.005 0411 WOOS 15:2314 1003.0 1.04 04/11/2000S 1S02"3 10024 1.2 04/ 11205 15:24:17 1120.6 1.D01 04/1125006 16:25:24 11/3.5 1.927 DSP-14 0DR iIns

Uv Jr 10.

DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:\... DSP149R-out.agt Date: 06/02/05 Time: 13:37:43 PROJECT INFORMATION C Company: The RETEC Group, Inc.

Co C

Client: Exelon Generation E Project: EXENW-18513 0.1 Test Location: Dresden Station 8 Test Well: DSP-149R Test Date: 4/11/05 0.01 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice 0.001 K =0.0003772 ftimin 0.

6. 12. 18. 24. 30. yO= 2.109 ft Time (min)

AQUIFER DATA Saturated Thickness: 49. ft Anisotropy Ratio (Kz/Kr): 1_.

WELL DATA (DSP-149R)

Initial Displacement: 1.76 ft Casing Radius: 0.083 ft Wellbore Radius: 0.25 ft Well Skin Radius: 0.25 ft Screen Length: 10_.i ft Total Well Penetration Depth: 49. ft Gravel Pack Porosity: 0.2

tlopot gmnr~d.

Ropotl O*mtoII.

WW*b&J Vonfon O4/1242006 144.0;44

.M.0;41202 200-O4-1I 164042 DSP-1494Rouo.0 4.01 wl2 6S..0 , n to 12W82 Fbl-or VWWoo 3.00 Unit 'w: 30-w *vTROLL Toltons: D0P-140/ ot T.0i dewed ot: 04111/200o 10:40:0 Toot oibt oof: 04/11/206 t16:40A42 Tool -t WA WA WA 00* oo*~ ta Logaittoit 081 M&Idm 400 5mbt t o 0d6 pob : 600.0 8009d6.

N,-lw.rdtl f .affrl 115 TOTALDATA SAMPLES 116 cv- r.~ 011 Qootd -*

Chw- - :

Ch~w.. nmmbr IrA Tonooc 1.000 Wo 102.400 tobt (8000,00 lootH)

Uoor-d6o~ r- : 0 F-.4"20 Pso.a- on P-a 00a4 . roteno 16.100 FOM H20 ChMA02 00 04/t1/2100 0411lr/2o6 ThEn 16:40:42 16:401.42 ET b) 0 0.3 Felt H20 1.724 2.18 K) 4111/2000 16:40-.42 0.0 -2o3 0411r2MS*0 16:40.42 0.0 2-104 04/1112006 15:40;3 1.2 2.147 04/11/2J006 15.40.43 1. 2.130 04111/2005 16.40;42 1.0 2.127 04/11006 140:44 2.1 2.127 04ý112006 AU*4"44 2.4 2.10 04/1112006 10:4044 2.7 2.106 w44112006 1540;.46 3 2.102 64/1112006 16:4ý:44 22 2.1 04111/2006 16:40:46 3.6 2.0(4 041112006 10:40;46 39 2.002 04/1112ý06 15:40:40 4.2 2.00 041112000 10:40:0 4.6 2.0-6 2.04 10:406 4.0 0411 2000 04/1112000 10,40:47 6.1 2.00 04/11/2000 10:40:4? 6S4 2.079 04/112006l 10:40:47 65.7 2.014 0411112000 15040:40 6 2.072 0441112000 10.40:44 0.4 2.071 04/11/2004 15:4r44 0.,7 2.067 04/111 005 16:40:40 7.1 2.006 041112006 10:40:49 70 2.001 04/1112000 15040:50 0 2.059 04/11/2006 140:10 8.4 2.066 04/11/2046 16:40:61 85.0 2?.041 04/112000 1504051 9.05 2.047 04/11'200r 15:40:52 10 2.062 04/11/2006 10:40:52 10.6 2.051 04/11/2006 1z:40:53 11.3 2.040 04111120 16:40:6z 11.0 2.047 04/1112000 16:40' 4 12.6 2.044 04/1112006 10400: 13.4 2-.42 04/111200 1:.40:066 14.2 2.04 04/1112005 15:40:57 10 2.036 04111/200 16:40:07 15.9 2.022 04/1112000 15:4036 10.0 2.03 04111/2006 15:40:59 17.0 2.027 K)

DSP-1490 oIa Pa pw. -

IT. ET I-) FC H120 04/111MD06 15:41:*0 1g.0 2.023 04/11/200W 16:412= 20 2.010 0411112206 15;4/203 21.2 2-015 04/11/2000 1C41:04 23.4 2.01I 04711"2006 17:412.06 23.0 2.005 0441112006 16:41W 20.2 2-001 04/1112006 75:41:00 25.7 1.00 04/11/2005 16:41:10 202 1.9OE 04/102006 10:41:11 29.0 1.9 04/11o2006 10':41:13 01.0 1.970 04/1112006 16:41:15 22.3 1.972 04/1112006 16:41:17 3692 1.007 0441112006 15:41:19 37.3 1.9"9 04/1112006 10:41:21 32,5 1:.92 04/1112006 16:4123 41.0 1.944 0411112006 10:41:20 44.3 1.084 04/1112006' 1:412 40.5 1.924 04/1112006 15:41:31 40.7 1.:1' 04/1112006 15:4114 52.6 1.O06 04/11/2005 10:41:17 55.7 1.005 04/11/2000 16:41:41 00 1.805 04/11106 16:41:44 62.5 1.073 04/11/2I06 1:-41:4 00.2 106 04/111o200 1 r41:62 701 108e 04/1112006 16S41:0 743 1.034 04"/11/206 10420o0 75.7 1.02 04'1112006 16;42:00 004 1.0O0 04/11j2006 164.A 0 004 1.70 041112006 16:47:10 90.7 1.773 04/11/2006 15:42.21 00.3 1.700 04/11/2005 16:42:27 150.2 1.750 04/11/2005 16:42.33 111.5 1.717 04/1112005 10:4240 118.1 16,7 04/11/o006 16:42:47 120.1 1.070 04/11Z,200 15:42:04 132.6 1.6"5 04/1112005 15:43:02 140.5 1.M3I 04/11/2006 16:43:10 140.0 1.0, 04111r200 16:4.:10 1 57.5 7.04 S04,112006 16:43.29 167.2 1.509

" ) 4/1100 0411110o06 04/11200M 5 16:43=

16:43:40 15:44.01 177.2 07.,5 100 7.529 1.502 1.47.

04W11,2,06 15;44:12 210.0 1.442 04/1111 10:44:26 -. 65 1413 04/112506l 70:44:30 230.8 1.370 04/1" I200 10:44.,2 2M0.9 1.-46 041112005 15:46:07 266.5 1.311 04M/111r00 15:45:23 201.0 1.274 04/11,W00 15:45:40 290.4 1.230 04/1112'05 15:46:68 3162 1.100 04/1121000 15:46:17 330 1w150 04/-111206 15:4:346 304.0 1.119 04/11/2005 15:40:50 376 1,07.

0411112000 16:47:20 000.4 1.031 04/ 112006 10:47:44 422.1 0.98" 04/11/00 I5 14*sA01" 447.2 00941 04/I1/2006 154635 472.0 0.03%0 04/112506 15:4004 607 0.80 04/11/2006 1.;49:33 0310 0.003 04111200 100030 507 5.700 04/1112000 15:51:14 602.5 0.000 04/1112006 16:51:62 070.1 0.004 04/11/2005 15:6221 7009. 0.56 W4-1/2005 15:63:14 762.1 0.500 04/1112000 15:53:50 700.5 0.450 04/l r2006 15:04:46 54.4.2 0.400 04/1112006 16:65:36 ."4A 0.361 04111/2006 11:5602 947.6 0.310 04/ 1/2005 10:07:26 1013.8 0.2a 04/112006 10:60:26 1063.4 5.230 04/11/200 15:65:20 7126.6 0201 04/112005 16:00:36 1103.5 0.102 04/112205 15:01:46 1204.4 0.145 04/O11,200 16223201 1339.5 0.110 DSP-149R sosPg7 ft 2

In DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:\.\DSP157S-ouLagt Date: 06/02105 Time: 13:32:36 PROJECT INFORMATION C Company. The RETEC Group, Inc.

E 000 Client: Exelon Generation

_* Project: EXENW-18513 Test Location: Dresden Station Co Test Well: DSP-157S a Test Date: 4/11/05 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.0329 ftmin

0. 0.1 0.2 0.3 0.4 0.5 yo 2.358 ft Time (min)

AQUIFER DATA Saturated Thickness: 47.15 ft Anisotropy Ratio (KzJKr): 1.

WELL DATA (DSP-1 57S)

Initial Displacement: 2.5 ft Casing Radius: 0.083 ft Wellbore Radius: 0.25 ft Well Skin Radius: 0.25 ft Screen Length: 10. ft Total Well Penetration Depth: 9.7 ft

', Pack Porosity: 0.2

/. I

0*87101P.8 Ropon g-n..8b4 04/13/2M0 14:12.-4

..A002802 286 -It 173221 DSP.167S-804.68 4.51 1=62

'0-., Wo84ROLL OSP-167S-0ol T.8 dliod00 04/112M0 1V:17,35 04/11/263 17:55:37 14490.14,G-I b8A88844008081 8W0.0 H88118 of ".4b.011181 TOTrALDATASAMPLES 116 cIhrnd -- A-4 It)

S.-W- tA Chnn 8188.8895r M8954.860 type 45 d.g..

RCdP-o. -:

P0.,t. 13483.: 40 162.400DOm 138.001 60/2 0 Feet H20 39843fkbon.

a0.686F-l41420 (3 04/1 Oats 4/i 112105 006 04/11(2006 To 173216 17,32:.16 17:32:16 ET 4-0) F-1 H20 0.3 0.6 0 0.775 2.482 1122 04/1t,2500 17:2.217 0.8 1.880 04/11,2080 17:32:17 1.2 1.242 04/1142006 17:32:17 1.3 1.57 0/11/0 17,3017 2 1.8 1.211 04/112005 172e2:10 2.1 1.348 04114200'5 17.32:21 24 1.132 04/1112005 172Z:18 2.7 1.174 04/112003 1722:18 3 1.04 04/1112006 17-2:19 3.3 1."4 0"4/'1312006 17232:18 3.8 0.96 04/11W200t 1722.20 3.0 0.920 04t1112000 172220 4.2 0.556 a4Ilr/ 172220 4.0 0.54 04/111006 17:3+/-20 4.8 0.795 o041112000 17:32.21 51 0.787 04/11t200 17:2221 5.4 .740 04411r006 17.321 52 0,15 04/1142'000 17;2+/-22 0 0.701 04/11/'2006 I ':32:* 8.4 30870 04/1312006 17:322>22 0.7' 0.80 04111/2005 17:32= 7.1 0.842 04/1 12005 17:32:23 7.0 0.008 041112000 17:12424 4 0.80 04/1112.08 17L2:24 0.4 0.068 04/11r2005 17.3225 .09 0.695 04/1112006 172225 9.5 0,577 04/111W200 172220 10 0.575 4/1112000 1722:26 10.6 0.071 04111,2006 1732:227 11.2 0.002 041112006 - 1712:0 11.3 0.557 041112-005 173225 2 6.54g u.0 041112005 127.322 13.4 0.641 04/11106 17:22:30 14. 0.522 04/11"t0 17:32:31 15 0.021 Wit *20*5 17:32232 15.9 0.527 04/11200 $17:32.2 16.8 0.621 044112005 17:32:33 17.0 0.010 05P-1575 OM.olo

Chan:

D. T1e ET () Feet H20 04111/*008 1T'2+/-5 18.9 0.817 0411/2005 17:32230 20 0.511 04111100 17.'3227 21.2 0.51 0411112000 17-32.220 22-4 0.506 041111r06 17:32.M 23.0 0.61 04"1112,0" 17:3241 26.2 0.602 0411112006 11:3Z:42 20.7 0SA6 04111,/2006 1722:44 20.2 0.494 04"1200" 117:2+/-46 29.6 Q.463 04l11/006 17,3247 31 5 0-489 0411132006 172:40 3.3 0.4Aba 04111/20 17:2601 32.2 0.484 04111/2006 172+/-53 37.3 0.482 04"11/2008 17;2+/-5 30.5 0.478 04/11O2005 17:32:56 41.5 0-474 04/11/2005 172320 44.3 0.472 04/1112006 1/33.03 40.9 0.40 04/11r2006 17:3322 40.7 0.467 04/11/2006 17220= 62.8 0.462 04/11/2' 17;2:11 06.7 0.484 0411/200" 17.:315 59 0.40 04111200 17:3-10 025 0.42 7 04/11/20 17:3322 00W2 0.447 041 12000 1723528 70.1 0,440 044171 200 17=320 74.3 0.440 04/1110G 172520 70.7 0.459 04411/2008 172520 6M.4 0.427 04/11/20 17254*4 08.4 0.4.5s 04/11/20 17::340 03.7 0.427 041 12006 172-5:6 05.5 0.427 04/11/2006 17:34.,01 1052 0.410 04/112006 17:2*7. 111.5 0.416 04/11/2000 17,24:14 110.1 0.411 0411/29006 17.421 125.1 0.409 0411/2OOG 17.242 132.0 0.598 0.1..". ....'0 .... 0.365.

04/112006 112.42 14015 0.408 04/11/2000 17:54:46 140.0 0.401 04/11.v00 8 ¶723613 1 67.72 O.53 04411,/200 17:326 107.2 0.374 04/11/2000 17:S6:12 17t 0.372 04l 1M2006 17:06:47 2V0.0 0.504 04/11/2000 17:3650 223.5 0.25 04/11/2006 17:58:12 258.0 0.352 04111/2006 17:3027 260.0 0.347 04/11/2005 17:58:41 205.0 0.041 04/11/2006 17:5:67 211S 0.356 4411/2005 1727:14 208,4 0.327 04111/2005 17.722 510.2 0.223 04/11/M005 17:.751 336 0.310 04/11/2006 728:11 364. 0.31 04/11W200 17:50=2 370 0.304 04411"2008 17:3MD4 39004 0.292 04111=06 172,18 422.0 0,250 04111,42005 I7:30:43 447,2 0.279 0411/2006 17:48:.08 473.0 0.271 04111M206 602 517:40:500.203 04/11/201 6 17.4120 6a1.% 0285 0411/2006 17:1201

. 5.W.6 0.267 04/11200Z5 17:12 697 5S 2241 04'11/2005 17.4.40 052.5 0.221 04/11/2006 11D:440 570.1 0.210 04/1112o00 17:44:06 700.8 0.217 04/11/2006 17:44:20 17:46221 744.2 700.0 0.t07 0,213 04/11/2r*005 041111200t5 17:40:20 44,7, 0.t07 04/11/2006 17:47:10 094.4 0.103 04/11120" 1~

I7:481)13 047.5 0.174 84/11/2005 7740:50 08. 0.181 04/111200 11:40:50 7 1803.4 0.136 04111/2005 1761:02 1128.0 0.12" 04411/2005 17?2:09 119*9. 0.111 04111/2005 17:6220 12034.4 0.104 04111/2005 17:54:35 1339.6 0.102

/220.1670 Ott/ ýa PO k.

( ,i 10 .r DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:\...DSP157M-in.aqt Date: 06/02/05 Time: 13:39:51 PROJECT INFORMATION Company: The RETEC Group, Inc.

a Client Exelon Generation E 1. Project: EXENW-18513 a Test Location: Dresden Station

0. Test Well: DSP-157M 5 Test Date: 4/11105 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice 0.1 K =0.001823ft/min

0. 2. 4. 6. 8. 10. y0 = 1.776 ft Time (min)

AQUIFER DATA Saturated Thickness: 44.52 ft Anisotropy Ratio (Kz/Kr): 1.

WELL DATA (DSP-157M)

Initial Displacement: 2.254 ft Casing Radius: 0.083 ft Wellbore Radius: 0.25 ft Well Skin Radius: 0.25 ft Screen Length: 10. ft Total Well Penetration Depth: 41.49 ft 0i avel Pack Porosity: 0.2

14:14:17 W3. ý .01 3/0 DM.17 0li~U SPi7 t WO:1104 30-o(.,W T Tool 088004, Woos/00 18:2OX3 W/A DmftU.*1. a,: 04(11/200.

1.4(p. 0-2 614/Abf O .

X/ý - a,/ ý084IV 70124 DATA 00201.0 124 Ch.ýIll Tý ýfl C08orW -

MG.4/

6000400 150.000-tý 0000d.40,t 00 TOO 23.202 FOý 420 010ý 76e.

20

.,0011/ 10:2"04 m Pr.so . .o1120

.1027 0411100t6xi 18:20:23 0.3 -1,780

=41110006 1W:2623 0.0 .2..43 04.1100 10.20"24 0.0 -2204 04fl 1,"006 t :18:202 1.2 -2.10O 04l/110000 10:20201 2.1 -1.7'84 04/111005 10 :22 2.4 1.001 241/1 200 1.:22 2.7 .1.513 04411/2000 10'202 3.3 .1.0 04.1100 18:2a,2a 3,0 -1.703 O..(1100 102027 3.0 4--.768 04/11100 1227

=3I1206 10:2"27 .. 2 0.0 .. 8

.1.700 "4(11/2006 10:20:20 4.0 .1.%44 04(r1/2000 10e:20:20 0.1 .1.6:28 021120 1820*:8 0.4 .1.040 0,112006 04/11/'2006 103:2 16:28020 M 0.7 .1.608

-1.007 04/12 10:2020 6.4 -1.067 04( 1/200 18:2028

" 0.7 -1.640 04/11/2000 1020:3 7A -1.42 04(11, 0 41*820 7.6 -1.030 04/1/2)06 18:2031 8.0 -1.032 D,.1 1*Q* 182 o3.6 .1.5",

04(11/2000 1M26:34 03 -1.6 0411/200 10:20.35 11. -1.024 04101/2006 10, 32 14. -1.549 04(11/06 10:26:38 10 .1541 01120 ,10a28:33 10.0 -.1.06 04/11/

04(11/70008 08:20:41

.8:26:30 17.0 00 -1.512

.1.-4 04(11/2000 10. 0:.42 W4. -I.51 04/1~1(2000 160: 10 .1.10 0441 120 040l172006 18204 1M:20:46 17.

20.a .2A .412

-1.47 04/11/2008 10.20:40 23.8 -1.475 OSP.IO7M010

ChWr(

Da 1Tne ET (60c) Pam 2o 04/11r2005 18 26:48 25.2 -1.4l8 04/11/2006 18:26:49 26.7 -1.458 04/1112006 18:28:51 20.2 -1448 04/11/2006 18:20:62 20.8 -1.438 04/11/2005 18:26:54 31.5 -1.43 04/11/2005 18:20:58 33.3 -1.421 04/1ti2006 15826:56 36.2 -1.409 04/m11/200 18:27:00 37.3 -1.397 04/I 1/2006 18:27:02 39.5 -1.356 04/11/2005 1W27:04 41.5 -138 04/11/2006 18:27:07 44.3 -1"86 04/11/2006 18:27:10 46.9 -1.366 04/11/200 18:27:12 49.7 -1.345 04/11/2006 18:27:16 5Me6 -1.33M 04/11/2006 18:27:16 55.7 -1.321 04/1112006 18:2722 59 -1.308 04/11/2005 18:2725 82.6 -1202 04/11/2006 1827:2 66.2 -1.279 04/11/200 18W27:33 70.1 -1.267 04/11/2005 18:27:37 74.3 -1.255 04/11/2005 1B27:41 78.7 -A.239 04/11/2005 1B:27:48 83.4 -1.222 04/11/2005 18:27:51 B8.4 -1,20e 04/11D2005 15:27:56 93.7 -I.l15 04/I1/005 18:2t.02 99.3 -1.177 04/11/2006 18:28:08 106.2 -1.151 04/11/2005 182814 111.6 -1.142 04/1112005 18:221 118.1 -1.128 04/11/2005 18:28:28 125.1 -1.108 04/11/2005 18:28:36 132.6 -1.085 04/11/2005 18:28:43 140.5 -1.065 04/11W2006 18-28:02 148.9 -1.0f8 04/11/2005 18.29:00 157.8 -1.034 04/11/2008 18:29:10 157.2 -1,015 04/11/2I00 18:2920 177.2 -0.904 04/11/2005 18:29:30 187.8 -0.M72 04/11/200 152:42 199 -0.963 04/11/2005 1829:'54 210.9 -0.93 04/W1/2006 18:30:06 223.5 -0.12 0411/2005 18:30:15 M30.8 -0.809 04/11/2005 18:30:34 250.9 -0.8f5 04/11/2005 15:30:48 265.8 -0.843 04/11/2006 10:31:04 281.6 -0.617 04/I1/2006 18:31:21 298.4 -0.792 04/1112005 18:31:39 316.2 -0.769 04/1112006 10:31:58 335 -0.746 04/11 20 18:32:18 354.9 -0.721 04/11/2006 18:3239 376 -0.696 04/11/2005 18:33:01 398.4 -0.572 04/11/2006 18:33:25 422.1 -0.W48 04/112005 18:33:50 447.2 -0.625 04/11/2005 16:3-4:16 473.8 -0.602 04;111W200 18:34:45 502 -0.578 04/11/2005 18:36:15 531.9 -0.555 04/11/2005 16:36'46 563.5 -0.541 04/11/200M 18:36:20 597 -0.508 04/11/2005 18:36:56 632.5 -0.489 04/11/2 00 10:37:33 670.1 -0.487 04/11'2005 18-38:13 709.9 -0.451 04/11/2006 1:38:55 7521 -0.434 04/11/2005 18:3R:39 796.8 -0,415 04/11/2005 18:40:.27 844.2 -0.401 04/111/2005 18:41:17 894.4 -0.387 04/111/205 18:42:10 947.5 -0.381 04/l1/2005 18:43:06 1003.8 .0.356 04/11/2005 18:44:06 1063.4 -0.343 04/11/2008 18:45:09 1126.6 -0.327 04/11/2005 18:48:16 1193.6 -0.317 04/11/2005 18:4727 1264.4 -0.308 04/11/2008 18:48:42 1338,5 -0.305 04/1112006 18:50:02 1410 .0.299 04/11/2006 10:51:28 1503.3 -0.298 04/11/2006 18:52:66 1692.8 G.294 04/1112005 18:54:30 1057,A -0.289 04/11/2005 15:56:10 1787.2 -0.285 04/11/2005 16:57:58 1893.3 -0.285 04/11/2006 18:59:48 2005.7 -0.257 04/1lI/2005 19:01:47 2124.7 -0.286 04/11/2005 19:03:53 2250.8 -0.28 1DSP-157M in.xs Pago 2

10.

DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:\... DSP158S-out~aq Date: 06/02105 Time: 13:42:41 PROJECT INFORMATION C Company: The RETEC Group, Inc.

0 Client: Exelon Generation E 1.1 Project: EXENW-18513 Q)

0) Test Location: Dresden Station Test Well: DSP-158S Test Date: 4112/05 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice 0.01 K 0,01448 ft/min

0. 0.4 0.8 1.2 1.6 2. yO 2,98 ft Time (min)

AQUIFER DATA Saturated Thickness: 52,91 ft Anisotropy Ratio (Kz/Kr): 1.

WELL DATA (DSP-1 58S)

Initial Displacement: 1.7 ft Casing Radius: 0,083 ft WeIlbore Radius: 0.25 ft Well Skin Radius: 0.25 ft S(reen Length: 10, ft Total Well Penetration Depth: 9.08 ft 1'Pack Porosity: 0.2 I J a

L v V-t *.IL

ItnShe btn MWTrol Pro Report generated: 0411312005114:15:41 Repoli from fie: ..A.SN1282 2005-04-12 120218 OSP-158S ouLbo ieNu Vermbn 4.51 Sort.! uimber 12682 FiPWare Verons 3.09 Unlt name: 30-De ntNTROLL Tesl name: DSP-158S out lTet defined on: 04/12)2005 12:00:47 Test seleted on: 04/12/200M 12:0216 Test stopped Orr NA WA Dale pthered iugsL toetiti" Nba.rnao time between data poMW: 600.0 SeeS.n Numt ofdata sarnpe: 129 TOTAL.DATASAMPLES 120 Cnharet ranber I1I Mearsmeru t": Tewwerawue ChOrane arme:

Chanerl matr 2]

Mearmen type: Prwsses Ouhnel narne: wVw Senor Range: 30 PS1G.

D-W, 1.000 wart)

Lauue. 45 degras Elevar 152.400 noters (500.000 feet)

Mode: TOC User-defned reference; 0 Feet H20 Referenced on: dorm dewieon.

Pressure head at reference: 7.864 Feet H20 CharVI Prsaure Date rlne El (see) Feet H20 04/12/2005 12:02:18 0 0 04/12/2005 12:02:18 0.3 -4.011 04112.2005 12:02.19 0.6 -0,013 04/12/2005 12:02:19 0.9 .0.018 04/1212005 12:02:10 1.2 -0.022 04/12/2005 12:02.20 1i5 .0.02 04/12"2005 12:02:20 1.5 .0,022 04112/2005 12-02:20 2.1 0.023 041212005 1202:20 2.4 0.967 04/122005 12:02:21 2.7 -.032 04)12/2005 12.02:21 3 -0.253 04/12/2005 12.02:21 3.3 1.7 04/12/2005 12:0+/-22 3.6 1.150 04/1 1205 12:0222 3.9 1.156 04/12/2005 12:0222 4.2 1.478 04/122905 12:0223 4.5 2.135 04/12r/005 12:0223 4.8 1.25 04/112005 12:02:23 5.1 1.655 04/12W2005 12 23 5.4 t159 04/1212005 1202.24 5.7 1.305 04/12/2005 102=24 8 1.492 4/1005 120=224 6.4 1.352 04/12/2006 12,+/-25 8.7 1.329 041OZ7005 12:0Z25 7.1 1.291 04/1212005 12:02:26 7.5 1.227 04/12/2005 12.02=26 8 1.189 04/12,2005 1202".26 8.4 1.117 04/12/2005 12'02:27 8.9 1.068 04/12'2005 1202.27 9.5 1.019 A04/12/200 12:02:28 10 0.973 04/122005 A2:0229 10.6 0.932 W4/12/2005 12:02:29 11.3 0,597 04/12/2005 12:02:30 11.9 0.85%

04/12/2005 12:02:31 12.6 0.83 04/12/2005 12:02:31 13.4 0.804 04/12/2005 12.02:32 14.2 0.780 04)12/2005 12:02:33 15 0,789 04/12t2005 12-02:34 15.9 0.753 04/12/2005 1202:35 16.8 0.745 04/12/2005 12:02:36 17.8 0.739 04/12/2005 12:02:37 15.9 0.731 04/12/2005 12:02:38 20 0.72 04/12/2005 12:02:39 21.2 0.716 04/12/2005 12:02:40 22.4 0.702 04/12/2005 12.02:42 23.5 0.596 04412/2005 12:02:43 25.2 0.680 D0412/2005 12:02:45 25.7 0.504 04/12/2005 12:02:48 28.2 0.6 OSP-15iS cul.xls Pao, ý

Data Twne ET (Sec) FeM H20 04/121200M5 i22:48 29.5 0,672 04/12/2005 lZ:02:49 31.5 0860 04/12N2A5 12:02:51 33.3 0.67 04112J2005 12,02:53 35.2 0.W62 04112/2005 12:02:55 37.3 0.68s 04/12U2005 124/2:87 30.5 0.86W 04/12M2005 12:03,:00 41.8 0.852 04112.00 12:03:02 44.3 0.548 04/12/2005 12:03:05 46.9 0.848 04/12/D200 12'03:0 49.7 0.637 04M12 12.i0:11 52.6 0.639 04/12/2006 12-03:14 65.7 0.833 04/1212006 12:03:17 59 0.645 04/112/0M5 12.13:20 62.5 0.683 04/1212005 12.03:24 66.2 0.819 04/1212005 12:03:26 70.1 0.821 04/112005 12:03,2 74.3 0.625 04/1212008 12.03:37 78.7 0.015 04/1212005 12:03:41 83.4 0.613 04/112200 12346 56.4 0.613 04/122r005 12:03:52 93.7 0.817 04/1212005 12:03:57 99.3 0.619 0411212005 12:04:'03 10.2 0.603 0411212006 12:04:09 111.5 0.801 04/1210 12:04:16 116.1 0.607 04/121200M 12:04:23 125.1 0.597 04/12/20 12:04:31 132.6 0.585 04/1212005 12:04.A 140.5 0.801 04/12/2005 12:04:47 148.9 0.603 04/112200 12:04:56 157.8 0.593 04/12/2006 12v&,05 187.2 0.599 04M12/2005 12,'0515 177.2 0.565 04/12/200 1-M05.26 187.8 0.57-04/12,2006 12M05.37 199 O.7 041IZ.2005 12'05:49 210,9 0.573 04,1212005 1208*:V0 22M.5 0.581 412005 12:0615 236.8 0.581 041122005 12:0829 250.9 0.577 04/122008 12.'06:44 285.8 0.571 04/12)200 12:07:00 281.6 0.575 04112,2005 12:07:16 296.4 0.55g 04/1212005 12.07"34 316.2 0.5m3 04/1212005 12W07:53 335 0.555 04/1212005 12.:08:13 354.0 0.553 04/12/2005 12.08:34 376 0.553 04/1217005 12.08:56 3905.4 0.551 04/12.2005 12.09.20 422.1 0.545 04/12r200 12:D*.45 447.2 0.341 04/1212005 12:10.12 473.8 0.551 04/122005 12:10:40 502 0.538 04/1212005 12:11:10 531.9 0.536 04/1212005 12:11:41 563.5 0,528 04MM12)2130 12:1Z"15 597 0.53 04/1212005 12:12:50 832.5 0.522 04/117=005 12:1328 67091 0.528 04/112200 12:14:06 708.9 0,528 04/1212005 12.14:60 752.1 0.514 04/1212005 12:15:35 796.8 0.513 04/12/2005 12:16:22 844.2 0.506 04/12/2005 12:17:12 6894.4 0.504 04/12J2005 12:16:05 047.5 0G5 04/12/2005 12:19:02 1003.6 0.492 04/12/200 12'20M0 1083.4 0.491 04/1212006 12:21:05 1126.6 0.489 04/12/200 12:22:11 1193.5 0.4B 04/12/200 12".23:22 1264.4 0.502 04/12/2006 12:24:37 1339.6 0.473 04112006 12:25:67 1419 0.471 04/1122006 12:27:21 1503.3 0.479 04/1220=5 12:28:51 1592.6 0.459 04/12/2005 12:30:25 1687.1 0.455 04/121200 12:32:05 17872 0.451 04/12/200 12:33:51 18M3.3 0.446 04/112005 12:36:44 2005.7 0.438 041/12/2005 12:37:43 2124.7 0434 04/IZ2005 19-39:49 2250.8 0.426 04/112/M0 12.42:02 2384.4 0.432 04/1212005 12:44:24 2525.9 0.418 04/12/2006 12:46:54 2675.8 0.412 04/1212005 12:49"3 2834.8 0.409 04112/2005 12:52:21 3002.8 0.399 DSP-156 ouL.xs/

Li IZ.-I DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:A,,,.DSPI58M-in,agt Date: 06/02105 Time: 13:41:24 PROJECT INFORMATION 4..

0 C

Company:. The RETEC Group, Inc.

Client: Exelon Generation E Project: EXENW-1 8513 0)

0. Test Location: Dresden Station Test Well: DSP-158M Test Date: 4112/05 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K=8.501E-05 ft/nun

0. 12, 24. 36, 48, 60, yO : 1,969 fa Time (min)

AQUIFER DATA Saturated Thickness: 53, ft Anisotropy Ratio (Kz.Kr): 1.

WELL DATA (DSP-156M)

Initial Displacement: 2.2 ft Casing Radius: 0.083 ft Wellbore Radius: 0.25 ft Well Skin Radius: 0.25 ft Screen Length: 10. ft Total Well Penetration Depth: 53. ft

";mavel Pack Porosity: 0.2

In-Sau Inc. MGIlTroll Pro RIeport eMeate. 04/13"2005 14:17:08 Papa*o Imni Mr.SN1ZM82 k: 2005-04-IZ 14263TDSP-158M I.bI, Wwn-Sltu Venson 4.51 So"al nurnbo. 12182 Flonwore Vecito 3.U9 Unit narne: 30W mlnMTOLL Test name: DSP-158M in 7est tufted n: 04/12/2005 13:05:48 Test &tWed on: 04/1212005, 1426:37 Test stopped on: N/A N/A Data 021fembd umhiLowwmtlhs* kini Maapirru *me tolon data potn m00.o Secmots.

Nmwibrofdlda sawngls: 133 TOTAL DATA SAMPLES '3 Chauise now Chmm elnumter 12)

Meom mont type: Trature Channel n*ar. soowiwn Sensr Range: 30 PSIG.

La8wde: 45 deogrmes Elvbaon: 152.400 moems (5o0.000 fme) mTOC Usr-dellned referonce: 0 Fp 620 Raleverced on: chmmnl dennlitlon.

Pmsstxa head at reference: 14.742 Feel H20 Date Tres ET (sec) Feel H120 04/1212005 14:26:37 0 0.005 04/OV 14'2A:37 0.3 -0.005 04/12W2IWI 14:20:38 0.6 -0.012 0412V/200 14:20:38 0.9 .0.013 04/1120*5 14:26:38 1.2 .0.017 04/12r2&05 14:20:N 1.5 40.017 04/12.2005 1420:39 1.8 -0.019 04/z12r005 142&:39 2,1 ,0.0191 04/P12,005 14:20:39 24 40.019 04/12t2005 14:25:40 2.7 .0.019 04"12=205 14:2e:40 3 -0.019 04/1212005 1426:40 3.3 .0.019 04/11U2005 14:20:41 3.6 .0.021 04/12=2005 14:26:41 3.9 -0.021 04/12/2005 14:25:41 4.2 -4.010 04120 1426:41 4.5 -0.01g 04/1212005 14:20:42 4.8 .0.019 04/1212005 1420:42 6.f -0.019 04112F2005 14:20:42 5.4 -0.021 04/102 14:20:43 5.7 -0.019 04/112406 14;26:43 0 -4,017 04/1212005 14:26:43 6.4 -0V17 04/1W20 1420:44 5.7 ,0.9 04/12/2M00 1426:44 7.1 40.016 04/212005 14,20:44 7.5 -. 019 04/1212006 14:26:45 5 40.019 04/1212005 14:26:45 8.4 -0.017 04/12005 14:20:45 8.9 -0.019 04/212z005 142B:46 9.5 -0.018 04112/200r 14:2:47 10 .0,013 04/1212005 1426:48 10.6 -.O009 04/12/2005 14:26:48 11.3 -. 003 041212006 14:25:40 11.0 -4.DO4 04/12/2005 14:28:50 12.6 ,,008 04/1212005 14:20:50 13.4 -1.016 04/1212005 14:20:51 14,2 .19.34 04/1212005 1421162 1 -1.952 04/12/2006 14:25:53 15.9 -1.987 04/1212006 14:2M.54 168. -2.154 04/212005 14:25:55 17.8 -2.109 04/12/2005 14:26:5B 10,9 -1,632 04/12/2005 14:2&:7 20 -2.186 04/1212000 14:2*:05 21.2 -2.005 04112/2005 14:26:60 22.4 -1.984 04/12/2005 14:27:01 23.8 ' .1.99 04/12J2005 14:27:02 26.2 .1.976 04/1120905 14:27:04 26.7 .1.9 04117'2000 1427:05 28.2 .1.972 04/121200D6 14:27:07 29.8 -1.972 04/1212005 14:27:08 31.5 -1.971 DSP-158M~

in.rjtPus Page",

O6121 Prouure Date Time ET (99o) Feet H120 0412/2005 14"27:104 33.3 -1.971 D0iJ1* 14:27; 72 35.2 -AA*9 00212./005 14.*27:t 4 1 37.3 -1.9a8 0411212005 14:27 15 39.5 Am.95 04112r005 14:27:19 41.9 -1.985 0411212005 1427:21 44.3 -1.961 04/12/2009 14:27:24 46.9 .1.950 04,/12/2005 14:27:27 49.7 -1.955 04/1212005 14:Z7:30 52.9 -1.953 04/12/2005 14:27:33 55.7 -1.951 04/12/20 14:27:36 59 -1.947 04/12/2005 14:27:39 02.5 -1.94a 04/12/2005 14:27:43 66.2 -1.942 04/12/05 1427:47 70.1 -1,939 04/12/2005 14:27:51 74.3 -1.932 04/12/2005 14:27:56 75.7 -1.93 04/1242005 14:29:00 83.4 -1.9"2 04/12/2005 14:2.05

8.4 -1.92 04/12/2005 1428:111 037 -. 928 04/12/2005 14:28:16 99.3 -1,949 04/12/2005 14:2822 105.2 -1.943 04/12/2005 14:28:28 111.5 -I.9 04/12/2005 14:28:35 1111 -1.01 04/12r2008 14.-28:42 125.1 -l.gs 04/12/2005 14:2&50 132.6 -1.92' 04/1205 14:2957 140.5 -1.919 04/12/2005 14:28-.06 149.9 -4.917 04/12/2005 14:291t5 157.8 -1.004 04112/2006 14:29:24 167.2 -I.853 04/12/2005 1429.34 177.2 -1.943 04/12/2005 14:29:45 187.8 -1.933 04/12/2005 14:29-.5 199 -1,824 04/12/2005 14:30:.08 210.9 -1.813 04/12/2005 14;30:20 223.5 -1.803 041212J005 14:30-.34 230.9 -1.791 04/12/20 14:30:48 250.9 -1.79 04/12/2005 14:31:03 2e5.8 -1.77 04112/2005 14:31:19 281.6 -1.758 04/1212005 14:31:35 298.4 -1.742 04/12/2005 14:31:83 316.2 -1.728 04/1212005 14:32-.72 335 -1.718 04/12/005 14:32:32 354.9 -1.723 04/12/2005 14:32:53 378 m1.685 04/12r2005 14:33:15 398.4 -1.87 04/12/20 14:33:39 422.1 -1.651 04/12/2005 14;34:04 447.2 -1.634 04/12/1005 14:34:31 473.8 -14.15 04/12/2005 14:34:59 602 -1.5w 04/1212006 14:35:29 531.9 -1.576 04/2/r2005 14:36:00 583.5 -1.554 04/1212005 14:38:34 597 -1.534 04/12/2005 14:37:09 632.5 -1.51 04112/2008 14:37:47 870.1 -1.485 04/12/2005 14:3827 709.9 -1.463 04112/2005 14:39-09 752.1 -1.430 04/Q12/200 14:39:54 796.8 .1.409 04/12/2005 14:40:41 44.2 -1.382 04/12/2005 14:4t31 894.4 -1,351 04/12/2005 14:42:24 947.5 -1,323 04/12/2005 14:43:21 1003.8 -1.292 04/12/2005 14:44:20 1063.4 -1.259 04/12/2005 14:45:24 1128.6 -1.227 04/1212005 14:48:30 1193.5 -1.195 04/1242005 14:47:41 1264.4 -1.162 04/V122005 14:48:56 1339.5 -1.127 04/12/2005 14:60:16 ¶419 -1.093 04/12V2005 14:51:40 1503.3 -1.059 04/12/2008 14:63:10 1592.6 -1.016 04/1./2005 14;54:44 1687.1 -0.98 04/12/2005 14:56:24 1787.2 -0.946 04/12/2005 14:88:10 1893.3 40.90 04/12/2005 15:0&203 2005.7 .0.868 04/12/2005 15:D2:02 2124.7 -0.828 0Q1122006 15:04:08 2250,. 4D.785 04/1N2(005 15:00:21 2384.4 -0.747 04112/2008 15:06:43 2525. ,0.705 04/12/2005 15:M11,3 2879.8 -0.688 04/12/2005 15:13:52 2834,5 -0.624 04/12/2005 15:16:40 3002.8 -091 04/12=200 15:19:38 3180.9 -0.553 04/12/2005 15:22;47 3389.8 -0,512 04/12/2005 15:28:06 3589.5 -0.478 04/12/2006 15:29:38 3701.2 -0.45 DSP-1SSM snolo

r 10.

DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:\,,ADSP159S-out.aqt Date: 06/02/05 Time: 13:46:10 PROJECT INFORMATION Company: The RETEC Group, Inc, Client: Exelon GeneraUon E 0,1 0)

U Project: EXENWV-18513

03. Test Location: Dresden Station U, Test Well: DSP.159S Test Date: 4111105 0,01 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice 0.001 K: 0,0281 ft/min

0. 0.4 0.8 1.2 1,6 2. yO= 1.923ft -

me (min)

AQUIFER DATA Saturated Thickness: 50,66 ft Anisotropy Ratio (Kz/Kr): 1, WELL DATA DSP-159S Initial Displacement: 1,921 ft Casing Radius: 0,083 ft Wellbore Radius: 0.25 ft Well Skin Radius: 0.25 ft Screen Length: 10. ft Total Well Penetration Depth: 7.62 ft

(,Pack Porosity: 0,2

"tnt hInt Ninirop Pro Riqmlgeneried- 04/1312005 13:35:09 3 Report from ftls ... ,SN12682 2005-04-11 111513 DSP. 159S oul.bel WV~inStVerelon 4.51 Sehdt numberc 12B82 Firmwar Vuulion 3.09 Untl nant. 30-pSI mhITROLL Test name., DSP-I59S out Test defined on: 03/2W2005 20.38:12 Test started on: 0441112005 11:15:13 Test stopped on: M/A N/A Data gthered using Logarftmi testing Mexmmn time betweei date pock: 600.0 Seconds.

Number of data samples: 122 TOTAL DATA SAMPLES 122 Chamelnumater il Measuremn type: Temperature Channel name:

cham% nurte 121 Mearement type: Pressure Chan ramne: *nawdown Sen*or Range, 30 PSIG.

DenaW. 1.000 g91=3 45 degrees 152.400 meters (500.000 feel)

Mode TOC Uwe-dtsied refeerenc u Feet Q20 Referenced on: test star Pres*ure head at refernmce: 4.311 Feet H-t20 ChanI2J Date Tkne ET (sec) Feet 1-O K) 04/11/2005 11:15:13 D 0 04/11/2035 11:15:13 0.3 -1.22 04/11/2005 11:15:13 0.6 -0.284 04/11'2005 11:15:14 0.9 -1.208 04/1lr2006 11:1514 1.2 -0,473 04111r25 11:15:14 1.5 -1.172 04/11/2005 11:15:15 1.8 -0.88 04111r/205 11:15:15 2.1 -1.14 04/1 1M200 11:1ll5 Z4 -0.875 04/11/2tJO 11:15:t8 2.7 -1.127 04/11/2005 11:15.18 3 -1.04 04/11/2005 11:15:16 3,3 -1.138 04/11/2005 11:15:16 3.6 -1.172 04/11/2005 11:15:17 3.9 -11s 04/11/2005 11:15:17 4.2 -1.27 04/11/2005 11:15:17 4.6 -1.226 04/11/2005 11:15:18 4.8 -1.338 04/11/2105 11:15:18 5.1 -1.303 04/11/2005 11:15:18 5.4 -1.383 04/11/2006 11:15:19 5.7 -1.376 0411112005 11:15:19 6 -1.421 04/11/2005 11:15:19 6.4 -1.436 04/11/2005 11:15:20 8.7 -1.478 04/11/2005 11:1520 7.1 -4.487 04/11/2005 11:1&20 7.5 -1.525 0411112005 11:15:21 8 -1.538 04/11/2005 11:15:21 8.4 -1.584 04/11/2005 11:15:22 8,9 -1.569 04/1112005 11:15:22 8.5 -1.805 04/11/2005 11:15:23 10 -1.615 04/11/2005 11:15:23 10.6 .1.529

.04/11/2006 11:15:24 11.3 -1.843 04/11/2 05 11:15:25 11.9 -1.657 04/11/2005 11:15:25 12.6 -1.6w8 04/11/2005 11:1&-26 13.4 -1.881 04/11/2005 11:15:27 14.2 -1.89 04/11 /2005 11:15:28 IS -1.7 04/11/2005 11:15:29 15.9 -1.71 04/11/2095 11:15:30 15,8 -1.718 04/11/2005 11:15:31 17.8 -1.728 04/11/2005 11:15:32 18.9 -1.733 04/112005 1115:33 20 -1.739 04/112006 11:15:34 21.2 -1.745 D4/11/200" 11:15:35 22.4 -1.T53 K) 0SP-159S OUtols

Prs$m Dale Tbe ET (we) Fe*e t'20 04/11/2005 1115:37 23.8 -1.7-.

04/ 1/2005 11:15:38 25.2 -1.783 04/11/2005 11:15:40 26.7 -1.789 04/11,2006 11:18:41 28.2 -1.773 04/11/2005 11:15:43 29.8 -1.7T1 04/11/2005 11:15:44 31.5 -1.783 04/11/2005 11:15:40 33.3 -I.786 04/11/2005 11:15:48 35.2 -1.79 04/11/2005 11:15,50 37.3 -1.796 04/11/2*06 11:16:52 39.8 -1.6 04/112005 11:16:55 41.8 -1.804 04/11/2005 I1:15:57 44.3 -1.808 04/1112005 11:18:00 46.9 -1.812 04/11/2005 11:18:03 49.7 -1.818 04/11/2005 ¶1:10:05 52.8 -1.A18 04/112005 11:1&.09 55.7 -I.822 04/11/2005 11:16:12 59 ;1.82 04/112006 11:16:15 62.5 -i.c2e 04/11/2005 11:18019 66.2 -1.83 04/11/2005 11:18:23 70.1 -1.834 04/1/i120O 1:18:27 74.3 -1.837 04/11/2005 11:18:32 75.7 -1.839 04/11/2005 ¶1:1A.30 83.4 -1.841 04/11/2005 11:18:41 68.4 -1.843 04/11/2005 11:16:47 93.7 -1.947 04/11/205 11:185.2 99.3 -1.851 04/11*2005 11:16:58 105.2 -1.851 04/11/2005 11:17:04 111.5 *.1.83 04/11/2006 11:17:11 1168. -1.85 04/11/2005 11:17:18 125.1 -1.857 0411/20(0 11:1r.25 132.6 -1.501 04/11/2005 1:17:33 140.5 -1.86 04/11/2005 11:17:42 148.9 -1,861 04/1112)5 11:17:51 157.8 -I1863 04/11/2005 11;18:00 167.2 -1.865 04/11f005 1:1:8:10 177.2 -1.87 04/112005 11:18:21 l8a.8 -1.669 04/11/2005 11:18:32. 19 -1.09 04/11/'2005 11:18:44 210.9 -1,871 04/11/2005 11:18:56 223.5 -1.874 04/ilr2o0 11:18:10 238.8 -1.874 04/11/2005 11:19.24 250.9 -1.874 04/11/20W5 11:1W.39 265.8 -1.876 04/11/2006 11:19:54 281.6 -1.678 04/11/2000 11:20.11 298.4 -1.879 04/110005 11:20:29 318.2 -1.881 O4/11/2005 1120V48 335 -1.B63 04/11/2005 1:21:08 354.9 -1.857 04/11/2005 11:21:29 378 -1.887 04/1005 11:21:51 39M.4 -1.887 04/11/2006 11:22:15 4221 -1.885 04/ 112005 11:22:40 447.2 -1.889 04/11/2005 1123:07 473.8 -1.857 0411112005 1123:35 502 -1.891 04/11/2008 11:24:05 531.9 -1.84 0411/2005 11:24:36 563.5 -I.8 04/11/2005 11:25:10 597 -1.884 04/11/2005 11:25:45 632.5 -1.597 04/11/2005 11:28:23 870.1 -1.893 04/11/2005 11:27:03 709.9 -1.887 04/11/2000 11:27:45 75z.i -1.896 04/11/2005 11:28:30 700.8 -1,9 04/11/2005 11:29:17 a44.2 -1.901 04/11/2006 11:30:07 694.4 -1.902 04/11/2005 11:31:00 947.5 -1.904 04/11/2005 11:31:57 1003.a -1.o08 04/11/2006 11:32:56 1083.4 -1.905 04/112006 11:33:50 1120.6 -1.906 04/11/2005 11:3:006 1193.5 -1.907 0411/2005 11:36:17 1264.4 -1.911 04/11/2005 11:37:32 1338.5 -1.911 04/11/200M 11:38:52 1419 -1.912 04/112005 11:40:16 1503.3 -1.914 04/11/2005 11:41:45 1592.8 -1.914 04/11/2005 11:43:20 1@7.1 -1,917 04/11/2005 11:45:00 1787.2 -1.817 04/11/2005 11:46:46 1893.3 -1.919 04/11/2005 11:48:39 2005.7 -1.921 DSP.159S oi.A.xIs Pao.

- J 10. .

_ _ I _ __. w DRESDEN STATION SLUG TESTS (APRIL 2005)

Data Set: C:A... DSPI59M.out,aqt Date: 06102105 Time: 13:44:37 PROJECT INFORMATION C

Company: The RETEC Group, Inc.

0) Client: Exelon Generation E, 0.1 Project: EXENW-18513 Test Location: Dresden Station Test Well: DSP.159M Test Date: 4111/05 0,01 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice 0.001 K=0,00193 fmin

0. 1. 2. 3. 4. 5, yo= 1,659 ft Time (min)

AQUIFER DATA Saturated Thickness: 49, ft Anisotropy Ratio (K..Kr): 1, WELL DATA DSP.159M Initial Displacement: 1.76 ft Casing Radius: 0,083 ft Wellbore Radius: 0,25 ft Well Skin Radius: 0.25 fA Screen Length: 10. ft Total Well Penetration Depth: 49.,ft

".a"el Pack Porosity: 0,2

In-Siki Inc. MlnrTroll Pro Report generated: 04/13/2005 14.03:57 Report from tie; ..,1SN12682200"-04-11 124214 DSP-159Moutbin W"n-Sltu Version 4.51 Serial number 12882 Fbmwere Version 3.09 Unit name: 30-pal mlnifTROLL Test name: DSP-159M out Test defined on: 041111200 12:40.20 Test started on: 0411112005 12:42:14 Test stopped on: N/A N/A Date gathered using Logarithmic tost*g Maximum time between data pohts: 600.0 Seconds.

Number of date sampler: 104 TOTAL DATA SAMPLES 104 Channel number 1)

Measurement type: Temperature Channul name.

Channel number 121 Measurement type: Pressure Channel name: drewdown Sensor Range: 30 PSIG.

Density. 1.000 g/cm3 Latitude: 45 degrees Elevation: 152.400 meters (500.000 feetQ Mode: TOC User-defined relerence: 0 Feet H20 Referenced on: test start Pressure head at reference: 15-212 Feet H20 ChanM Pressure Date Time ET (see) Feet H20 04/11/2005 12:42.14 0 0 04/1112005 12:42:14 0.3 0.334 04/1112005 12:42:15 0.6 1.364 04/11/2005 12:42:15 0.9 1.759 04111/2005 12:42:15 1.2 1.618 0411112005 12:42:16 1.5 1.626 04111/2005 12:42:16 1.8 1.665 0411112005 12:42:16 2.1 1.628 04111/2005 12:42:16 2.4 1.514 0411112005 12,42:17 2.7 1.622 04/1114005 12:42:17 3 1.600 041112005 12:42:17 3.3 1.593 04111/200 12:42:18 3.6 1.593 04/11/2005 12:42:15 3.9 1.591 04A11/2005 12:42:18 4.2 1,585 04/11/2005 12:42:19 4.5 1.581 04/11/2005 .12:42:19 4.8 1.571 041112005 12:42:19 5.1 1.686 04/11/2006 12:42:19 5.4 1.562 04)11/2006 12:42:20 5.7 1.558 04/11/2100 12:42:20 6 1.54a 04111/2005 12:42:20 6.4 1.54 04/1112005 12:42:21 6.7 1.536 04/1W12005 12:42:21 71 1.53 0411`112006 12:42:22 7.5 1.524 04/1112005 12:42:22 a 1.517 04/1112005 12:42:23 8.4 1.509 04/1112005 12:42:23 8,9 1.501 04/11/2005 12:42:24 9,5 1.491 04/1112005 12:42:24 10 1,493 04/11/2005 12:42:25 10.6 1.465 04/11/2005 12:42:25 11.3 1.477 04/111/2005 12:42:26 11.9 1,469 04/11/2005 12:42:27 12.6 1.459 04/11/2005 12:42:27 13.4 1.449 DSP-159M oul.xts

Chanr2J Preasure Date Time ET (sec) Feet H20 0411/2005 12:42:28 14.2 1.437 04/11/2005 12:42:29 16 1,428 0411112005 12:42:30 15.9 1.418 04111/2005 12:42:31 16.8 1.404 04111/2005 12:42:32 17.8 1.39 04/11/2005 12:42:33 18.9 1.377 04/11hir05 12:42:34 20 1.363 04/11/2005 12:42:35 21.2 1.347 04/111/2o5 12:42:37 22.4 1.329 D4/11 2VI5 12:42:38 23.8 1.316 04/11/2oo5 1242:39 25.2 1.3 04/11/2105 12:42:41 28.7 1.281 04/11/2005 12:42:42 25.2 1.263 04/11/2005 12:42:44 29.8 1246 04/111/2005 12:42:46 31.5 1.226 04/11/20o5 12:42:47 33.3 1.207 04/111/2005 12:42:49 35.2 1.165 04/111/2005 12:42.51 37.3 1.162 041112M00 12:42:54 39.5 1.138 04/1112005 12:42:56 41.8 1.111 04111/2005 12:42:58 44.3 1.085 04/1112005 12:43:01 46.9 1.056 04/1112005 12:43.04 49.7 1.028 0411112005 12:43:07 52.6 0.999 041112005 12:43:10 55.7 0.966 04/11/2005 12:43:13 59 0.937 04/1112005 12:43:17 62.5 0.901 04/1 /2005 12:43:20 65.2 0.809 04111/2005 12:43:24 70.1 0.833 04/1112005 12:43:28 74.3 0,796 04/1112005 12:43:33 78.7 0.759 04111/2005 12:43:37 83.4 0.72 04/111/2005 12:43:42 88.4 0.679 04/1112005 12:43:48 93.7 0,638 04/11/2005 12:43:53 99.3 0.599 (5) 04/1112005 12:43:569 105.2 0.556 04111/2005 12:44:06 111.5 0.51 04/11/2005 12:44:12 118.1 0.467 04111M2006 12:44:19 125.1 0.42 04/ 1/2005 12:44:27 132.6 0.377 04111/2005 12:44:35 140.5 0.33 0411/2005 12:44:43 148.9 0,287 04/1112006 12:44:52 157.8 0.241 04111,2005 12:45:01 167.2 0.193 04/111/200 12:45:11 177.2 0.148 04/11/2005 12:45:22 187.8 0.103 04/1112005 12:45:33 199 0.062 04/11/2005 12:45:45 210.9 0.017 04/111/2005 12:45:58 223.5 -0.024 04/1112005 12:46:11 236.8 -0.063 0411/2005 12:46:25 250.9 -0.101 04/11/2005 12:46:40 265.8 -4.138 04/1112005 12:46:56 281.6 -0.173 041112006 12:47:12 298.4 -0208 04/111/2005 12:47:30 316.2 -0.237 04/11/2000 12:47:49 335 266 04/1112005 12:48:09 354.9 -0.291 04/11/2005 12:48:30 376 4.314 04/1112000 12:48:52 398.4 -0.333 04/1112005 12:49:16 422.1 -0,354 0411112005 12:49:.41 447,2 -0.37 04111/2005 12:50.08 473.8 -0.383 04/1112005 12:50-.36 502 -0,399 04/11/2005 12:51:06 531.9 .0.409 04/111/2005 12:51:38 563.5 .0.417 04/1112005 12:52:11 597 -0.423 04/1112005 12:52:47 632.5 -0.429 04111/2005 12:53:24 670.1 -0.451 04/1112005 12:54:04 709.9 .0.439 DSP-159M outxls Pace 2

Appendix E Well Record Information

page I ILLINOIS STATE GEOLOGICAL SURVEY Private Water Wall Top 3ottam clay 0 15 lime'atone 15 60 clay 60 90 limestone 90 205 Total Depth 205 Caaing: 5' SCH 40 PVC 2.87# from 0' to 58' Size hole below casing: 5" Water from limestone at 90' to 205'.

Static level 60' below casing top which is 21 above GL Pumping level 140' when pumping at 12 gpm for 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Permanent pump installed at 160' on July 18, 1984, wit ijacapacitf of 12 gpm Additional Lot #12, Thorson #2 subdivision.

location info; Location source, Location from permit a Permit Date: February 9, 1984 Permit 0: 111185 COMPANY Pykes, Charles N.

FARXTI"6 DATE DRIU brWiir NO. I EL*VATION 0 COUNTY NO. 22798 LOCATION SW NW SW LATITUDE 41.379741 LONGITUDE - 86.267348 COUNTY Grundv API 120632279800 36 - 34N - 8E K

, STATE OFFICE BUILDING, SRNGFIELD, AL/WATER SURVEY$ SECMON. 81 SURE TO GEULOGICAL AND WATER 10,

)atie X" 12o :13 .Coatyah

,t

, r wumiwnO at depti -ILto St see.

14, ScSeeo__.__ __

Lenqtb:.._t, Slot-Eley, - -

IHOT LOCATON IN aCTiI FuAT (Peiiit)

16. Sie Hole below cuing: D ,.

17, Static level V.t below casng top WW Is TI (C' ~ Cboveou..devel. Pumpia glevel ft.

9pm for Ihous.

S ?DMATTOSS PA835M THROVWN nojo DNOY I

A Mg.,"

- = l i m -= -

(CON'rUE ON SEPARATE SHEET IMEMESSARY)

SIGNEDJ-

~~?)~yiY~t

C OF ENYIRONMENTAL HEALTH, 51WEST DO HOT DETACH GEOLOGICAL/WATER ROPEP wELL LOCA(JON.

GtO'LOGI b)(L6)N WATER SM E"Yq W'll REC05U (b()ý ak11, .-73

0. Propet*.t11 h.

,Adde (b)(6) 1.,Permit No. Z)ZaI.-'*-i -Dat r/-/_

depthi Diam, tdzf.

N., atScreea: -in, Twp. . ' -

Length:_ft. Slot_ R__g_.__

Elev, ..1L 15, Casiz, and Liner Pio

16. Size Hole below ias! in. . ,

17. Static level*,/I below coslng top whichssit.

above ground level. PUMP*n level 2.?S5 when pMpR; t.

gpm for-ZLhours, subersbibe pM set at 1651,

(&'4 ~~tfr ~Ž* 18 FORMATtONS PADIED THROUGH iiaCuza DKP1AO?

~*FI2L/

II I llllJ

i I .

REQUESTED AND MAIL ORIGfl4AL TO STATE 1AU Of EHVIROHNEHTAL HEALTH, $15 WEST 701, DO NOT DETACH GEOLOGICAULATER E*POE *L LOCAT. N.

GEOLOGICL AD lATE

10. Pinped=

11.

12.

14, MOw

!-MAI (IL.) -ad Isigt sad F... (h.) (To IL)

OtAM0OUPLA C?)ON D; CtIO PIeT.

9* /hA1-0m 1 e9, 7hors I f I-I I I- j.,, 1 sw (Permit

16. Size Hole below cas1:~irC..ji .1

17. Me level . t. belw ca c. is. ft above glound levtl. Puqp*o level . when p2 4at gpmfor4...6urs SM. pump set at 180'

18. 7O ATIIN PANI D ;;1 J UGH I cPJ 2-b tc 07V F

~fl~LO ~

(CO~MM 0EPAAEai EAY GrT1ND

QUESTE AND) MAIL ORIGINAL TO STATE cr,

$, STATE OFFICE BUILDIN, SPI*NGIFIEL, CVL/WATER SURVEY$*SEK. BE SURE TO GEOLOGICAL AND WATER SURVEYS WELL RECORD

((6V -ploted 6-28-I71 Driller ... .. Lcese No. 2Z5 II, Penit No. -1011 . Date I1, 1R 12, Warter bm 13. County ag m atdepth -_ to -__ft, sec, 36-

14. Sceen: Dm...... oi, '_p. 31.A Lengt-ft, Slot - Rge. _3L 701S 646 1E XW Ng W SW-Ep.......

5.

Dig C.(in.) ndu 624 141ght Ifru MFt)To (ft.) WD

,Black pipe - 4o SLCON MT

-. ___ ___ - 70! liiBut

.J

, 66'HV a 1W INS' L

16, Size Hole below casizq:JL-7B I.j.(ei 17, Static level _2.f t. below casing to which is_____________ ft.

above gound level, pmpi* g level 6..ft. when pumpn t.5.

9Pm for _L ous.

18. FOTIONS PASSID TIMOVWI =aNc30 D4 I

e 88 i~m y

(cONTfMlUE ON SEPARATE SEW tF NECESSARY)

SIGNED E,C. WehiAg ,r Jme 30, 1971; C o0-m . ~i.

GEOLOGICAL AND WATER SURVEYS WELL RECORD 10, Prop ()6 Mo.

Driller KnOerl. IMIlo E. Lima No. t

11. Permit No, 1126Z . Date 05511 .

IL Ueter from oc _ 13. Cuty 1 .

at depth _..t@J.& t, sec. 36 14, Screens Diam. In. Twp. 14 0 Lteth:._ ft. Slotot te. L

- [Elev, ---..

15. Casino an Liner Pipe Diim, (In.) Kind and Veight Fro(ft) To Cft)

S 5 PWIo

16, Size hole below ca*ing: 5.jn.

17. Static level . _ft, below casino top wich is 1 t, above oroun level, Pping tevtlj6 ftie puwping it gpufwr,...,._ *,

15, Formations posed throgh Thickness Iotto Mt topsoil

__ ___t - -

clay 3 5 rock 55 hard &soft shale 65 12 rock 75 20 V Grundy If - -'L1 14"

UESTED AND MAIL ORIGINAL TO STATE OF ENVIRONMENTAL HEALTH, 535 WEST DO NOT DETACH GEOLOGICAL/WATER ROPER WEjI'.lnCATION( -

GEOLOGICAL AND WATER SU SWELL RECORD /

J, 1.

2.

4, 5.

4mL (I1L) Id and hIght From (FL) To (FL) Weow

-. LOCATION IN

- ,Lot #15, UPh S...- sat Tmil-Mclntoch SuM.,

S ke Hole below casing .. .t) (Pei

~7.Staic level. _ below casing top which is .,,, .j above ground level. Pumpin IeveliýQft. when pumping ataL. ::,', *,

gpm for /4.. hours.

FORMTIONS PANID TWOUG TmICInI DIMP 71 II I-Ilir (CQNTME ON SEPART NCSHUSpARy)

SI" ______

,. ..~~

I ;.":. '

I tti iIi

REQUESTED AND MAIL ORIGINAL TO STATE AU OF ENVIRONMENTAL HEALTH, 535 WEST

'01, DO NOT DETACH GEOLOGICAL/WATER

PROPEV."ELL LOCATOR, GEOLOGIC AMD TRIR (b)(6)

Driller, 11, Permit No 1

12. WOWtero, bo1 2 14.

016M, 4) MW c~Weight td Ins MFt)To (ft.) No ft-LOU=TO1 IN gzl - UTIONPLAT A~ (per~dt)

WS

17. Size Hole Weow cu!Bg.= - itn.

17. Static level

.... !bt.beow caing top which i 17, adove 9=0ua level. PuqbIq level ft. When pump* u.

dg qpmfor -/- ious. Submersible pump set at 140'

8 . O. ION PASSI THROUGJI TI-CU DI Op

,(2 .*.. . ...

i

'zz?1'ýLov SIC- 10 -. DT T E U.t , IN

-*o,.*.**.*3

$1~,~4) ~U1IDI

QUESTED AND MAIL ORIGINAL TO STATE OF EM1IRONIMEHTAL HEALTH, 533 WEST 00 7IiETACH GM"* CAL' W

?ROPER...".-'--.OCATq TE 10~ /

Ii.

12.

at depthx~tO49ýft. See, Lenqt....jt, Slot-. Rge.9 Elev.

DimL ji%) 9Mnsam 1.1gM Fre(FL) To (FL) SHOW LOCATION IN 8C1=0K PLAT S1 1W st (Niit) 16, V7, above grouud level. Pumping level when Mping atz I6-t.

qpm for h..L owz, lB ORAT!OXS FASIED THROUGH =hcumuDPhO t go ANY~

-7.

4~4 -

I Jill ".-..

(COMNUniE OF SEPARATE SIRET NECESSARY)

V

.z (J oalt uWMR fll. VfulWih& IV 31AIC ko"

.A4, STATE OCE BIUI 3PtROMUiPJLD, SICAL /WATER SURYS SECTIO. BE SURE 1 10.

C.

I.

11, 12.

14.

Dim (h) M d. (I.) To (FL) Iow LOCAT~KI IN SECTION PlAT SE WS$

(Nrent) 16, S4e Hole below casing: in.

17, Static level Ba ft. below casinqW~p wich 13........... t LL~

4Ž. above groun level, Pumping levilaD ft. When Pumping atA.L..

WpMfor .....hours,

.IO SD TMUQ NS PASI IDIPA W TIIVIN i l _]i i1n r- -

S _IGNlED\

VI =___ O ,L DIE (CON . ,O SHE JSEPARATE

.. IF . AR1)

V, : *JU

'Ed ~yuatv MU kL~UflIWrI. y m~t~i or.

36,STATE OFiCE BUILOING, SPRINQFI.D, CAL/WATER SURVEYS SETO. It SUKTO 44 Dion. (110~ End sM lekjt (I. To (Pt.)

frho. SHOW LOCAIU a sCOum PLAT Lot 25, W&dv a st(peri~t)

16. Slie Hole below cing-, . In

17. Static level. t. below cuing top whichis above goul level. Pipun* 1evel!ýL ft, wbeD pq~iq atLO.,

5p for .Lbouf.

IJ (OTNEON SEPARATE SHEE I?.nECARY)

SIGNEDt j

STA1TE OFnCE MJILMO, VMNGnELD,

',AL/WATER SUMYIY M11N. st MJE io i.

Disa (g) tu .4d WIitt mnu(FL) To__)_ no

~ IICTOK PIN Lot 19 Nolitoak

16. Size Hole bel nslan--i.Z.a rk 17.

lve. uming sva~

abvegr -

. WhetMng t

'I I

(CON'fnU ON SEPARATE SHET IF1WKESARy)

I-y!

UP ICU AMIMAlL VKIWNMA6' IV 01419 MER HEALTH PROTECTION, 5I5 WEST DO NOT DETACH GEOLOICAV/ATER ROPER r J.CATIf

/

I

.0, Driler e tic.

Permit No. I, t 6 Date

.2.WVter fr ** *. 13. Cmty at dept]o to, ,ft. ,uc. 1 '

i4.S;am: Diu.-In. T*.,*A Le :__ft. Slot_

Elev. -

15. Casing and Liner Pipe WI0 DII.. (kn) Mad ad I4Iat Mi (ht) To MIL)

LOU= IONU

~mm3L 11U1 MAT it 73 Wild iatheSbo.,

'I TIRE 9g %~4*lqkl I+ o.

' 4A 16. She Hole blWow casin , in -.

17. Stale level -ft. below caun top whicis ft.

above ound level.. Pumping level ft. whe pumpia at.

IpFflu-.b =. SuhL pu set at e.

1. FORKATIOM PAUNID ThRUH JiiI DjJ

,~

p 9 " DATE.

.E FurD .44. 1.1 UOokq g1 .. V

Q)UESTED AND MAIL RIGIAL. TO $TATE OF ENVIRONMENTAL HEALTH, 535 YEST DO NOT DETACH CEOLOCICAL/WATE R ROP ER WCL LOCATIQ- 1~*

C 2,

2.

4.

.5.CusiD ad Linet Pipe

, 9W Sis-.

nd 1210 I,*" (,* ) To (FL) I0T LOCATION IN 5ZCTION PLAT

.,- ..... - - Lot 78 Kch.

toch SE (pert)

V 16. Size Hole below .asin..

7. Sttic level 4oit. bWlow Cm*ng top which i (I

Ia.O IATION PAXI =M=a= O DET 0D ATBE abv

_~J____-mn i e'Q Pmpiz who ewqal (ODNMIUE ON SEPARATE SmIF WmClaRy)

/

SIGXD T u.s.

N "MUt OUILUrn* rlmtirl.i ".U..

U SURVEY$ sicOh, BE SURE TO I, GEOLOGICAL WATER SURVEYS WATER ELL RECORD Competed 8.13-8 1o, Dept. Mines 5,39. ye YI L 11, Prope.t Ad&d b)-6 (b)(6)

DrIllet Vh~li rb~~n...... Liceue No. 2.2 6.

12 Water from ?;,_ " _' 13,. Cu____

atdepth ._to._.t,

14. Screm:.Diami....in Twp. _

Leg-*h:_ ft, Slot._ Rog. SL.

?m91owIVaSE SE 33 NE IS.Casing c.dLfni Pipe WffdNo 71-(17) in-F)T k now1 LOaTIW p 6 I e Ie o0 2 0=11W PLA?

5 2al-r. Sealesa 286 306 "

N

16. Sihe Hole below csing: -671L.in. 5 / 0 33 11

17. Static level ...-1 ft. below cubng top which Is ....Jfr )1L above ground level, Pumphg leovoj L.ft. when pmp* atJL$...

P for ..L hom.

18, f*,R,10"o PANlO TUMRTMUH ' aImOl top soil 3 3 OGrale1 7 .10

_-4m 222 _3 sh~ile 28 160 Lin 30 10 Bud Stone 10 1m i (see. reI s, side) 115.. . Z .

(COMM oN SEPAATE =IHT IFNICh8SR1UT SE 1, SIGNED O, W~~ii~g~P1'~Riinf ,,,ATh, 28 16 Ii I...

MowI~ Aft lU gw 1 1*1A vvqh

'swggi,~

,STATE OFFICE BUILDING, WRINGFIELD, kL/IWATER 'SRVEY$ ETION BE SURE TO L'AND WATER SURM IL RECORL; WEL to 4i..t4 atdep Dl,____n. ft, Sec.

14. Screwn Twp.- *::

Lenqth.....ft. Slot Re .. k.

Elev. -- -

15, Casing ad Lber Pipe Di.L (.L) Kind ad Welght Fim (FL) T___(* S?*T0NoL

,. !-Mcontosh Sub.

16. Size Hole belCasing. M. nL 1'uit) 17, Stc level . ft, below casi to which above round level. Pumping levol fLWIweND pumping at-iL .

gpm for. L hours,.

18. ,o,.ATo1I8I lAD THOG I

- :D~o1 -

........-. I-

-- ni in- e -

l Iln-- -

i ii-i -

%-A V ViaAi orAL F1Iri!IL.=AKI)

/ SIGNEb DAT

EQUESTED AND MAIL ORIGINAL TO STATE

ýUOF ENVIRONMENTAL HEALTH, 535 WEST

!,1 DO NOT DETACH GEOLOGICAL/WATER PROPER LL LOCATW'a'

.A 101 11, 12.

14, Dia. (it.) %IndOWd veltbit Fm (it) To (FL) I.QCATIO IN MYIOPUAT 0? a]it17, XcIa-ich sub. ISa

'K 16. Size Hole below cuing. iu, meit)

17. Static level .*oit. below c tsigwhich is 4 .. ft.

abovegm .ft. levelpm* level Whet PUqq ath 18 ORMAT101 PlatoE THUROG KJ1*J EPT 4,0/'1

--v (comflm ON suam1T SwEE IFNmCSSni

~(UJ4-.M-NS)o.

a, P111 ILLINOIS GEOLOGICAL SURVEY, URBANA

Releas

. _'I.. _,,

lop t Soil .John B. Milllis Sandstone 2.

2 25 Limestone Shale 52 Limestone 12 Shale 255 25 258 Limestone 2 275"56 Shale 275 279 Limestone 279 288 Shale 288 Limestone 292 292 468 Sandstone 468 W Shale 633 639 Sandstone Limestone 639 ,.

657 692 Red rock 692 695 Limestone Shale 730 Sandstone 730 Limestone 7A Sandstone 75 55 775 Limestone 775 788 Static water level 76' ID 29" hole to 181'9" Casingi 26" plpe cemented in 18l'9" 3pecific capacity - 0.65 PNmping test and water analysis filed n Gr u pnd Log of production, test filed.

('

mpay Commonwealth Edfion Company

Am Dresden Nuclear Power Plantwo, I

)AITED~m !1957 lumo John B, Millisý COWfl ieo908 vA" 510' Est, - T.M. [1-1 O-AION .Onh, II - "

(U#-4ON-144) 0 WNQJOIK MWL M, UAMJA This yen was drilled deeper by**.C Weling December 24, 1968 under permit

7010Of Lime Shale 3, 1182 Wiae and lime 1189.

Lime 1205 1211 Lime and she sandy Line 1226 Lime and shale 1229 Lime 1265 Lime. sdy 1315 Lime Lime sandy 1330 Sand .1351*

Sandy lime 1355 1392 Sand 1412 Sand LiW 1*417 SWn Sand an shells 1474 Sawnd Shale, sand Wndlime 1185 sandy lime Lime 6 I'

Total Depth 11499 Size of hole - 19n Static water level - 158 belov cuing top; Non.-piping level - 174' Caing 20o bla**pipe fr-o'0" 8 Length of airline -6001 Well Test Data filed.

S-So 156258 I.,--,

t~bWeiling Well Works. * ,D*' e' ai "'"',

I-V - C=000valth Imltv 1V.n.

ILLINOIS GEOLOGICAL SURVEY, URBANA afff"tt Released 1-1-58 b' ,

John B.Millis Sumary Sample Study by G. . Eac 9/57

)EHSYLVANIAN SYSTEM Sandstone, silty, calcareous, light g4 to whites fine to medium, angular compact to friable, micaceous 5 5 Sandstone, silty, calcareous, light gray, fine to medium, angular, incoherent, micaceous 20 25

)MDOVICIAN SYSTEM Cincinnatian series Maquoketa formation Dolomite, slightly calcareous at top light gray to %hite, fine to medium

.little coarse, crystalline 27 52 Shale, dolopitic, brown to grayish-brown, bzittle to tough; interbedde with little limestone, very silty, dolomitic, brownish-gray, fine, crystalline 23 75 Shale, slightly dolomitic, brown, tough, to brittle, little weak 50 125 Mohawkian series Galena formation Dolomite, slightly silty, light buff to buff, very fine to fine, cry-stalline 25 150 Dolomite, slightly silty, light buff fine to very fine, crystalline 40 190 Dolomite, slightly silty, light buff to buff, very fine to medium, cystlline 70 260 i Dolomtie, ightly silty, light buf COMPANY Commonwealth Edison Company FAM Dresden Nuclear Power Plant ,o I CAREDIU.E 19ý7 cownv Neo t0

G.H,Eich 5AVA $10' Est' -'T.M

O'144-4Bf-541).*s IWNOlI WZLOGCAL SM WO

-A601 i

Sh Th7 I-To I WN fine, little mediu, crystalline- I0 Dolomite, slightly cherty, slightly silty, buff to light grayish-buff, fine to very fine, little mediu crystalline 30 330 Dolomite, slightly silty, buff to light grayish-buff,,very fine to fine, little medium, crystalline, slightly cherty at base 25 355 Platteville formation Dolomite, silty, gray, buff, very fine to fine, slightly mottled 380 Dolomite, silty, light buff to light gray, very fine to fine, crystalline 20 400 Dolomite, silty, light buff to buff gray, fine to very fine, granuler 15 415 Dolomite, silty, light buff to buff very fine to flnej, crystalline 151 430 Dolomite, silty, buff to brown, ver fine, crystalline, slightly speckl d (red, black). 20 ,450 Dolomite,, slightly silty, light bu f to grayish-buff, very fine to fine*

crystalline 18 46a Glenwood formation Sandstone, very' dolomitic, silty, light gray, fine to medium, little coarse, rounded, frosted, incohereit compact; grading to trace of dolomite, sandy, silty, light gray extra fine 473 Chazy Series St. Peter formation Sandstone, white, fine to medium rounded, frosted, incoherent 27 Sandstone, as above, silty 15

,* Sandstone, silty, light gray, very I.,

4 rAMA'nWA.AI m ilk-I mm B,

rounded, frosted, Incoherent to friable 2 535 Sandstone, light gray, very fine to fine to medium, rounded, frost-ed, incoherent to friable 70 605 Sandstone, as above, silty 20 625 Snadstone, vite, very fine to fine little medium, rounded, frosted, incoherent 633 Shale, sandy, slightly glauconitic, light gray, weak to brittle 6 639 Prairie du Chien series Shakopee formation Dolomite, very sandy, slightly silt light gray to buff, very fine to extra fine, crystalline; little sandstone, dolomitic, light gray, very fine to medium, rounded, frolted, compact 18 Dolomite, buff to gray, extra fine 657 to very fine, crystalline 23 Dolomite, slightly silty, brown to 680 buff, fine to very fine, crystal--

line 12 Dolomite, silty, buff to reddish- 692 brown, very fine to fine, crystal-line 3 Dolomite, slightly cherty (oolitic) 695 slightly silty, light buff to grayiGh-buff, very fine, crystal-line 35 New Richmond formation 730 Shale, sandy/, A~ite to light gray, week 3 Sandstone, slightly dolomitic, Ait 733 fine tonmedium, little coarse, rounded, incoherent, little compac 5 738

(I1W-401-4.54) 1"013l 0OILOMAL IMMW, UWWN Dolomite, buff to grayish-buff, very fine to finl, crystalline 17 Sandstone, %hite to light gray,'

very fine to coarse, rounded, incoherent 10 765 Sandstone, silty, light gray, very fine to fine, little-medium to coarse, rounded, incoherent, litti e compact 10 775 Oneota formation Dolomite, buffish-gray, little pinkish-buff, fine to crystall ee 780 Dolomite, little gray to lightV buffish-gray, very fine to fine 5 crystalline 785 "Limestone" 3 788 ID q%- - - .3 . - 1L. - I - - -.ý j I

ILLINOIS GEOLOGICAL SURVEY, UUANA IT"ba Tuo son LioAe rock Sandstone 0 51 Sandy lime A1 13 sandy tsale 13 16 Thne 16 24 Shale 214 62 Lite 62 125 Shale 125358 Lize 358 364 Broken lime, shells and shale 364 00 Lie 400 407 Sansne 407 462 Shale 495 Sa7d 495 502 Sandy line 502 504 Shale 504~ 515 smd 515 518 SWn and shale 518 527 Sand, 527 -534i Shale s3 651 Lime 651 657 Rea rook 657 700 Lim 700 702 led rock 7102. 7O Lime ~7167 705 710 Send Shale 769 780 Lime 780 787 M,616 shale break 77 908 idle Red rock 908 1022.

Lime, crude Oil noted 21014 3

1024 00MPANY Bechtel Corporation PARM Dreasdn ftleai Power SU.

No*.2 u&ntomuco 1957 cowm N907 U~VAMlN r31 stimated vi

(1"4 -1 W-09491 .01 IWKItI QEUMCLUWII OVMMAN

bae M23 Sand and lite 12140 1221 38* LAO 1270 Umie and shal~e 121M 1280 1290 11298 and shale Sad Lite, ~1331 331 SSud ~1337 S.S8429050

/i

/,

f *I A- - I-~- I' -

- 0 .. n-,

~hmm

(3TS3S-..*M..-.4-).

ILLINOIS GEOLOGICAL SURVEY, URBANA tbi~ 'thklm Tq lmai Summary Sample Study by G.H.Eni~h 5/1/57

?LEISTOCENE SERIES Soil 2 2 Till, yelloah-buff, oxidized, leach d 1 3 No Sample 2 1NNSLMA1lA SYSTE"11 Siltstone, slightly sandy, dolomitic micaceous, gray, weak, trace of coal 20 25

'No Sample 10 35 RVICIA .SYSTEM

'Zincinnatian series Mýauoketa formation L.mestone, very dolomitic, white to light gray, fine to coarse, cry-stalline 15 50 Dolomite, very calcareous, light gray to light buff, fine to coarse, crystalline I0 60 Dolomite, very calcareous, slightly silty, light brown to light gray, fine to medium, crystalline; little shale dolomitic, light greenish-gra brittle to weak, slightly lminatei 7 67 Shale, dolomitic, brown to brownish4.

gray, t6*'to brittle, little weak, slightly laminated 60 127

'10harkian series Galena formation Dolomite, light buff to grayish-buff, very fine to medium, cystalline 18 1 45 Eo commy Bechtel Corporation L1 rAN Dresden N~uclear Power Station. 2 DEA~o[

D 15 vATION G.

wmURm 3o=

H.-slja Emich 5301-Estinated.- Own No TM..ei':-

M-M-0440lo

, IWNOI OVLOMIA WRWI noJI qo Sb Dolomite, slightly silty, buff, Ver fine to fine, crystalline 10 155 Dolomite, buff to grayish-buff, very fine to fine, crystalline 5 160 Dolomite, slightly calcareous, slightly silty, buff to grayish-buff, very fine to medium, cry-stalline 30 190 Dolomite, slightly silty, buff to grayish-buff, very fine to medium, crystalline 15 205 Dolomite, buff to grayish-buff, coarse, fine, crystalline 25 230 Dolomite, buff to grayish-buff, very fine to medium, crystalline, slightly speckled, (black) 10 240 Dolomite, light buff to light gray-ish-buff, fine to coarse, crystal-line 20 Dolomite, buff to light grayish-buff, little pinkish-buff, very fine to fine, little medium to coarse, crystalline 20 280 Dolomite, pinkish-buff to buff, fine to coarse, crystalline 1.5 295 Dolomite, slightly silty, light buff to g:ayish-brown to gray, very fine to medium, crystalline 20 Dolomite, slightly silty, grayish-brown to brownish- gray, buff, fine to coarse, crystalline 25 340 Dolomite, slightly silty to silty, buff to grayish-brown, very fine t fine, little medium, crystalline 15 Platteville formation Dolomite, calcaueous, silty, gray to little buff, vey fine, crystal ine I C' Becte n-orain---

3 I" ~~IWNO13 GEOLOOCAL OVAIYOMI SinkX*1 To I f Slightly mottled 15 370 Limestone, dolomnttc, silty, gray to buff, very fine, crystaline, mottled 40 410 Shale, calcareous, light green, brittle to weak 5 415 Dolomite, buff, very fine, little fine to medium, crystalline 20 435 Dolomite, slightly silty, buff to brown, fine to very fine, crystal line 25 460 Dolomite, trace of sand, slightly silty, li~te buff to buff, very fine to fine, crystalline 10 470 Glenwood formation Sandstone, silty, slightly dolomltc,,

light gray, very fine to fine, little medium to coarse, rounded, frosted, incoherent little, com-pact 25 495 Shale, slightly sandy, light green to light gray, brittle to weak 5 500 Chazy series St. Peter formation Sandstone, white, very fine to mediz1 little coarse, rounded, frosted, incoherent 15 515 Sandstone, silty,. light gray, very fine to fine, little medium to coarse, rounded, frosted, incohere tlO 525 No Sample 5 530, Sandstone, light gray, very fine to medim, little coarse, rounded, frosted, incoherent 30 560 Sandstone, light pay, very fine to fine, little medium, rounded, frosted, incoherent, little, com.

pact 1

i

(17325-RK-6-N)

IP A *Y, MW JLLOIS GEMOLOGIO.

ST~iu To Shale, light gray to light g*r'eish gray, brittle to weak 5 580 Sandstone, as above 615 Sandstone, white to light gray, ves fine to medium, rounded, frosted, incoherent, little compact 37 652 Shale, slightly sandy, light brown to light grayish-brown, tb*,g little weak 3 655 Sandstone, silty, light gray, very fine to fine, little medium, rounded, frosted, incoherent 5 660 Sandstone, light gray, fine to coare, rounded, frosted, incoherent 2 662 Prairie du Chien series Shakopee formation Dolomite, silty, light grayish-broy to light pinkish-brown, very fine, crystalline 8 670 Dolomite, slightly sandy, slightly silty to silty, light buff to br little light gray, very fine to fie, crystalline 25 695 Dolomite, silty, brown to buff to redisb-broun, very fine to fine, crystalline 15 710 Dolomite, slightly cherty) slightly sandy, silty, buff to brown to ed.

Ish-brown, very fine to fine, crystalline 20 730.

New Richmond formtion Sandstoba, slightly dolozltic, light gray, fine to medium, little coin rounded incoherent, compact; llttli dolomite, very sandy, light grayto light buff, very fine/crystalline, to extra find 1 745 vnMain vi~f hha aw

1P 5 IUNOi*OOGnow= P", UJMA b~-

- 70 M -

Dolomite, trace of sand, silty, buff "to brown, very fine to fine, little medium, crystalline 15 760 Sandstone, light gray, fine to mdid, little coarse to very coarse, round d frosted, incoherent,little compact; little dolomite at top, slightly sandy, slightly silty, light buff t light gray, very fine to fine, cry-stalline 10 770 Sandstone, silty to very silty, lighb gray, very fine to fine, little medium to very coarse, rounded, in-coherent, compact. 15 75 Oneota formation Dolomite, silty, little buff to pink ish-buff, extra fine to fine, cry-stalline 10 795 Dolomlte, slightly silty, light gray" to pinkish-buff, very fine to fine, little medium, crystalline, slightly cherty in lower half, 30 Dolomiteslightly silty, white to light buff, very fine to medium, crystalline 15 840 Ddlomite, white to light buff, pi*k, very fine to medium, little coarse, crystalline 35 875 Dolomite, cherty (oolitic), light buff to buff, very fine to fine, little medium, crystalline 45 920 No Saple 5 Dolomite, slightly cherty, (oolitic) siltys, light buff to buff, very fin, to medium, crystalline 10 3 Dolomite, very cherty (oolitic),

I,tIot very silt l ght buff.to ne 1 fI, 20ii 2ýýW -

WADI VAX= SM, W" 1P 6 u~~utowT UIII R 7 zLOIA Dolomite, cherty to slightily (oolitic, silty to slightly silty, trace of snd, light buff to buf, extra fine to fine, crystalline Dolomite,- very cherty(oolitic), slio It~y sandy, buff to orange, light gray, very fine to fine, crystallinel sandstone, silic, wthte to light gra medium coarse, compact 10 AM~RIAN SYS71M St. Croxin series Trpealeau fozmation Dolomite, light gray to bufflsh-gray extA fine to very fina, crystallin 10 Dolomite, argillaceous, light gray to grayish-buff, very fine to fine, crystalline 1030 Dolomite, very silty, pinkish-buff, gray, very fine to fine, crystallin 1l0 1040K Dolomite, slightly sandy, slightly silty, light buff to light gray to pinkish-gray, very fine to fine, crystalline Dolomite,. silty, light buff to gray- 15 ish-buff, very fine to fine, little medium, crystalline 45 L1O0 Dolomite, slightly glauconitic to 9gluconitic, sandy, silty, buff to gray, very fine to fine, crystallin 35 1135 Dlomite, silty to very silty, grayi brown to grayi uff, very fine to fine, little medium', crystalline slightly mottled Liao Dolomite, silty, light buff to buff, graYish-brom, fine to medium, Pranconia fornation 18 J,19 Dolomite, glauconitic, sandy to vey U

eace~he CDoristion- N ieden Ruclsi

A" .

-- - - -~ V - ii

-V-4

- -e -4

/9.29 6-P SCALE. I' - too' GOOSE LAKE 'TWP 3- 36E W1/4 V2 S.W.1/4 SEC. 36 T34N. R.BE.

1P 7 EOOIL $Umi, IWNOI11 URBANA SbUa sandy, slightly silty, light gree Ish-bray to pinklshubuff, fine to medium, crystalline, V40i shale, sandy, green, weak 22 1220 Sandstone, glauconitic, dolomitic, silty, light greenish-gray to buff, very fine to medium, incoherent 13 1233 Sandstone, very dolomitic, glaucon-itic, slightly silty, light gray to light greenish-gray, very fine to fine, rounded, compactto incoher grading to dolomite, glauconitic, sandy to very sandy, light greenish-gray to gray, fine to very fine, crystalline 22 18 Sandstone, glauconiticl, dolomitic, silty, brovnish-gray to greenish-gray, very'fine to fine, compact to incoherent; grading to little dolomite, a; above 15 1270 Sandstone, glauconitic, dolomitic, silty, gray to buff, very fine, compact, little incoherent; inter-bedded with dolomite, glauconitic, slightly sa*, silty, brovin to light gray,,.fine, crystalline 56 1326 Ironton formation Sandstone, slightly dolomitic, light gray, fine to coarse, rounded, in-coherent; interbedded with dolomite, sandy, buff to brown, very fine to medium, crystalline 19 1345 Sandstone, light gray, fine to coarse, rounded, frosted, incoh-'

erent; interbeded with dolomite, sndy, buff tf. 1 rown, wV,;t*f fine, ciyA 30 1375

WN OW WA MM,)MW Sandstone, as above' interbeded

i*

.little dolomite, as above: 1340 Sandstone, slightly silty to silty, light gray, fine to coarse, round, frosted, incoherent, interbedded with little dolomite, very sandy, buff, very fine, crystalline 1415 Sandstone, slightly silty, light gray, very fine to coarse, rounded frosted, incoherent 20 1435 Sandstne, slightly silty to silty, light gray, very fine to medium, little coarset rounded, froste, incoherent 10 1445 Galesville formation Sandstone, slightly silty, light gray, very fine to medius, rounded frosted, incoherent 1450 Sandstone, light gray, fine to od-ium, rounded frosted, incoherent to friable 15 1465 Sandstone, silty, light buffish" gray, very fiae to fine,, rounded, frosted, incoherent to friable 5 1470 Sandstone, light bufflshgray, fine little median, rounded, frosted, incoherent to friable 20 1490 Sandstone, very silty, light gray, very fine to fine, rounded, froste friable to incoherent Sandstone, light bufflsb-gray, Vry fine to fine, rounded, frost, incoherent I

-M . L-Bechtel CorrpAtinh.

8111*

J Pill I ILLINOIS GEOLOGICAL SUIVEY, UUANA 31v, 517.41 Topoll, dark bou Sad, odium, yellov-w-Sadsto-Dgr e 3-3 Wetelevel I I"?'

Not -, I.,-liw, 2O'N, ine NW.!

2.0 3-1 Topol, 4AM 8Ston., gr See raps - fle w. 03=., a3-1, MW n0=0a~lth UsoCDp* St ILL DIbMuMA3M 19355OTRS~

w"Pm 1ersstttsbaTut- ig UVATION

ppI WILNOIS GIOLOGICAL SURIVEY, UUAMA

.See apo Wa Me~ not 4434,72P 0-.m1 D~IOWJoe 1955 CUTNomi wmmrf!tUilogo.?ittftobig orle -V et*n

.4-

ILLINOIS GEOLOGICAL SURVEY, URBANA i- Ii T Topsol W1.51decaposed sitone 0 2-0 Maquoketa fomtion Divine limestone mber IL~tou,,co gOrandw, hW vC7 4igt gpy to light p'ay; fractred Wn weather. 1-71 0.

SStiN, 0U9g p yrite6mfal teartibass r.u8p1 Doliute, aedim gar&IWI hedp vuw, light oray nam P 4 5ha1OpctiW;s soattaid ppi 2 Do1mits, fWn garned, lcAlly Priltic 3.

shtule culoereos, soft to trft31B1.

lowr shal.e grAlh browm; locully caloacecs mq ummatbared fraotius a nearly Ver~tical htbara about 60t 45, a 0dge ds oform; fractm ~atl '1 4t45,47'1481, 521.'-At, 371 It 581, 59'60, 6541t6 67064.81 so NNu~W C~aowa th mdim o w I~t Il 193 &G.LI.0yWm lka Ii !

52A5ION 521.5 K

cm=5IoM14'01 UI.Oom "OM9OIP UmAN mRUI, Whl, u ibor., bd iU.p MT 4ak grqid kmi ; ro Lb 98.

tic Wo~u doloto Dtot, maim *.*.n, hbe, ne letoqs.* m.,n Ah ill Wvl~ey opt*e prtlup, pocks meas aq fttaoma. B841 CIN at lD6'6".7l$ 112'.fl2'6' 1

.40 ape - tile no, hl10,.72, A3-1) hosti 1-17 w I - L U

iUINOIS GEOLOGICAL SURVEY$ URBANA i htumo To k-P31STa1E SYSTEM Not 89;W 0 4ro EEMSYLA]IA SYSTEM Smiditone, udim gine, d alightl7 wat~isdp Iroitia ad*rem, Win oal, z eo*t 90.10' t, ]41.14t- 0 21.

Ymuoketa fcmation Divine flimstoe member' lmee*$ne, amaoe gained, hW m lih Feq; eve in o *ts toee 2 Do~atep Wid+/- gaindzlh, Pb17, light pq aha =afld I Dolmitte fin gandW, lay1%&4 Nut~ grq; partlugs ad uvy~

of greon sahei abde M ieto SWale "loao=$a soft to bi labted, grrieh grn 7.7 We#shale lower tlat silty, ted, ii braml locaLy cu~o=sos;W at 6641-U67t21, 82W831 '90mi1 lO3lu Shb, a Abu"e,ort fin.]p ,Id k bromish gay; bedly hoksn 10-19 SWhaI firs pqeh pmn Gena doi1te.

DolUdto, nudl gaitued, ba, -

,Omm ommalth mdinoumny st &I

-AM BNrowes klolea ow,,r StatfNo -. 26.

)ATIDRWO;ý01mIJ71 1955 cw~j. L tt,,,o%

0410.1 1A b NID I) 1OcATiO

(DSU-UX--W1~

WNWIM IOLOMU IuW. iNUI ly.t m To ligt wioel grq; s: MO IWOlA pt*.lg5, I-*, p da8. oan fraotlv; td T See maps - file m.o 4M3, r , oet 1.17 D3.11,

/.

I V ~ea kolw 1o~? Rtatiem. s*J__

WVIBW /ft A~ -~

Adr w

ILLINOIS GEOLOGICAL SURVEY, URBANA

-- 4-PZBTM SYSTU Not supwl 0 3MM9WUIA SYSTEM sctonet~, udFJ Pained, . o, cdamc~, Codly pwU'tlng, gp asighti7 wutheae, lught br 9 YAquolceta fmiation Divine limestone mebab liwetons, wom re ainad bed vc light psy; 61'04t 7wg, I' P Lts 19 '31.zO' 22.0 Do1oitoi :Wium paind,~ ber, light pay; fey gree 61aeI ba4 hfroke24L27' L.

Do1ladtop fln. paind, 1oce 7wg, b"cal4 piritic, N gay a- pW g iuh pra 3V~

Ashe, caloeous, adt to ladunted, grayioh gree; fosed1c M

-lowoer Ihl cleremu grayish brM43-See tape file no. 4.1034G72, 43.1, st 1~.17 IOMPU lIV0==d th MMow p I I8tal I bk~ou ftbor hatatlon NQ.:7 Z -;.1_Z

)AT' DNM mev1TS4y 1955 ,~4 roJrc~74

~T~O~l' ~ QO~G.,3 &V..3

.I QZflO-UM-U1 P*I IWINOIS GEOLOGiCAL SURVEY, UUANA Ii lbs Sand, silty, brov 0 2-6 Sandstone, ediu, ben,ceabonaceous 7-3 streaks Sindstone, fine, gay, carbonacous streaks Sandstone, coarst, piayl CarboACeOUS streaks 20-3 Shiale) gray Sandstone, fine to "dlia, ray 203 Sandstone, coanse, ray, carbonaceou streaks Lost drill War 0 48 ft.

Apparent void 486-Sandstone, coarse, ray 4H8 Apparent void 49.0 SAndItone, coare, pgy, CaRb MuS streaks gill$, gray, dark Conglomrate, shale ad limeton, pal 57-0 Liestone, broken, with lage green 6146 sWe slems Liestont, gray, fractured-Liaestont, broken, green shal sams LieStone, ahy, frCtUred 06M Liesto4e,. ho*enyoobtd factard, gray, thin plee shale em ShaIo green, sdy Shtl, dark gray 9100 Bottom of Hole Recovery 2'6' to 7' 100 7' to 121 N.

TYME BY INDhE STO

'"C=Onlth Edison Cmpcay it Il FAIN Drsdea auc, Powo S. 1"T ft 37 "Time~j October 1956 WQUk&N W1,2

.I..mrv Drille'; log

, ili, 518 I IM.,a, 4,,-

~line, 70' 9 ln. NU

hi ILLINOIS GEOLOGICAL SURVEY, URIANA 3'-

Core study by Georg lo Wk~as 10-26 IYPID BY ENGINM.ING SECTION 0 2

,sadtoe, light gm uIth hxow strhs, sm cabo"e pwtings, Odiaglned, arlcron sou Maim6 Sadstone, fin goale nosl, maul Idth a few rMous sot$, gry, urbonuaous pa*t*&, oruws dd i.6 SNtnIe, mostly media graoed, alcarous. gray with ca*rbo ou patins, amsboddod, core pdAle in1o0W '10 fet; wry sal-am"Oau 49' 494', aM 50'6' to tO.r~lOP" 14 bill, n uWareou l"ited, duark gly 51-7."

Sus$ la* y, hoevily us, reoM Iree mste fta~eats vtp uui@1L to 41 d1Iate, i gra*ys green shale; me of the oshal Is lft i.* -clays osecially at the bas Limesto, ,oae p4 i, po*esh aMd pinis; hl*g og fractm uad shale 6216A to 63160; greeis cl shale (go1e) at 6,' AMd 60'6"1.

a"gle tract=$s ol, in me 674 omIpAy Ccmmnalth Edson CamW itad7

,,,:' DzoNessa*, Pow,$t, nK 37 CA7IR QQg lw~f 96 1420 KONYO +*

C16 ' '4"s518

," ',,*,,iu *Z' Y

1'~~*

~, 2 IIUKM iAo Iwy uw 12' to 37' 100 37' Ito 42' 42' to4l' 91%

47' to 521 52' to 571' 9 57' to 6116" 7H 6116" to 66'6" 6616" to 721 100%

721 to76'6!%

76' to 811'0 81' to $6' 94%

86' to 911' 911 to 96, 93 Ow day after dillil,depth to uta 10 ft. 2 in.

U ~..,.b *..j M1~

A IU.iMS GEOLOWC.

SUW*Y, IUWA 1Iu To DoWto, , ,gy,py, n? or less b6rokou a few hiO-ha~ngl faew DOlmite, fine piund, ith I few P-oeeish prti , Pyritlc Dolmlito. Very arg0laceus, light greensh gma SWil, dark grayish b.m, finely pyritic, hM aglso sw sme noely vtial ct s. *0 Bottom of hole I -

____________ I n

.1 4t Fw ILLINOIS GEOLOGICAL SURVEY, UUAHA MrAmum=

kmm 1.

0 Tqmi1 0 beat,vsto brv8ta O'toaw nacgumi, cro..budid, b Sbael 11ma, grqt frutmot 2&.3 0 64 SWAM', maims var lim vro 09AScI, crosobde&8d, tcoid 534, Divine 1~UtoUR mberb undiou, coalg valwo Wg 5716sm6m~, 66M 6" Do~el 'to V iid, bol I44 BUOYt3 WIuy Owl IM p a boutMI cmIon ait to 0

ýýýfto

rmemzo =$*Pe~m*

maZo, L 4.~~

~~ThOmT GWY by ~.,,UJ UTI.%9

"+51" , i kitb-51005 1,n 20.nr's .

(235U-HM-141)

IUAKOI$

GIQI~C0~. IURV!Y, UMMA

.. w.. =,To Swao, Cdamou So*t to ff ,

W, Mi4e. cty Ivued3f~ks 5 V'sw, Jbgt ; gioý uhlms is; aqlasJlyupatod Ul~g~Obo A&d f"-Ies men W4no1~fu;394 16s i6mp1786" Pal. 1 :

Se nape - no, h ,02, n.., Iile o l7 Do- d+- adi v p",...

hPi tIUISOIS I GEOLOGICAL SUIVT, UUANA Ii~mI 1w I

Pa T IST EI Not sampled seastone, mdiu pagt

, miac ,.

veatwe, no core 21'94';

prart at 121' siltstone c 15', -16' 2'*U Maquoketa famtion Divine 11ustwe meber D, *ite Namu graind, light Vq; gret: hable bep, fractured, hoke 261,351 shle p 'timga, * *,it .oi Mhaet CAlceOu, soft 45-,

111bat4A, p'qls greonto ffra, 491-541; flov of tobas fU atlentl10dq1; fraotures m~ e 6.7 i8.68??1, 76'6'-781 at '.6' 7M.

tro; tracturii at 827421P 107 am vedalth. Wdon calm rAM Dresden babew hvier It al W1 IDRWOOt,4OY, station x"o.31 1955 =MUIAY27?

ýXnV WM 509,5 - .w au V & .

1..

va 2 LN rAeaicUwuI V" Ibuh ~iam To Galena dolmdte Doladit., Ddiu gr&IW#d bard, yw, ligt pal green Oha~

in videlyip" patI ,

pocketo, W Beams; c=e frac W~ in shut $$eputs 3.

Sooe, body roke, at gro142.6 See uaps - fl, no, 140347~2, 0-41 to 1-17

(Ifl1O-JOX-441)

PlI ILLINOIS GIOLOGICAL SURVEY, URBANA swst, wi oa r a dowo.uts §taed.%, soft, 64 11halk trm; a Mqofkoa tfbite ak l~t~aywih ~h ou" o dUNNl, abasout~darc" fq of w31t3' en hal; ratup Hw Ueta fo pay;paring Divy lualu oge umb ne j Sh at 2,61crei, sot xffa 1Dintel du F",ts b.e, pe* ht at 31134 my TIRON of m45u

ILLINOIS GEOLOGICAL SURVEY, URBANA, lot 88411d 0 O cmewatsa, wwomeecoo.dp, cmuton vaiwoi y fawed I t 4 -

8161bed01, 14ewa 615 1 Mqaqueta f~ntion Divine ibeston ember DWetone, lgt grah*edy, omusa,~e~d preou shalpten Dolmdto, uiaft'gabned badSl nwigg,]ght goy; oaldltehe 551'91-561 Dodotte, fine gandj )bcAy Tw Fmr few petlnEd uIW7 at 56Ltop71) 58 .86%0t, g at '2' 4 W,al, 1com0, soft to thm td pyish eoia; fracot~ at 6 M'6.

lalcelou gpyish brow; aW at 69,80, 7013w72 Drom101M w Srtiton %28' TON220". So Umse 5501-L linmlvI

-~

(~BU-4M-141J y

2 IWNISIOLOWUALUVIT~UWNA LYN"1l Tq loxe owae Shbl, Amin~t,

- l# cl walckwo, ~Jlwnats,vq-brom see map -. "il n. 413M i3-1,7wtý 1.17

C) Q N

C (UIM1-41(-4.Ei NP4 ILLINOIS GEOLOGICAL SURVIY, URIANA Sbs 1~

- - I-4.G 434~ 47.0 64.9 Ske w2.

See maps - We o,/D G.Q72, :n3, tleotei1-17 I - d- i-owommCodtb miso onm It .I.

fmDnoaie bce. Pow stat* o.28 molOe 1955 Out Me WmnoA 04HONM11OII 1o.PtU~gh t

Wra 2mflt 0 J.PA. -

ILLINOIS GIOLOGICM sIRYIY, UIAHA li~u Tq Sand, silty, broym 0 2-6 inistone, brow, Coarse, soft 6-6 Und, on hard sandstone fragments, 6-9 brov" Sandstone, brovn, coast 8 Sandstone, fine, gray, with thin black 18-0 Sandstone, coarse, gray, with thin bla 22-0 seams Sandstone, corset, gray 52-0 Limestone, broken, with shale seem 54-6 ble, soft, green 5-Limestone, gray, fractured Conglomerate, gren shale and gray 66.0 limestone Wol, gray gpeen 686-Limstone, gray, fractured, with soft Th"6 green shale ses Shae, grien with some trace Of lame 18-0 stone ale, dark gray 84-0 Shelby tubs saple from 6 Inches to 2 ft. 6 in, Recovery 2'6 to 8' 13' to W '0%

18'to 3'1

'to8' 928 28 to 33' 331 to 431 84 .TIF)B1X- I G~

= 01 toNpmYComwalth Edison Covpany it aI VAN Mtdln H~uts PoW. Sta. 0o39 mlOmm tober 1956 ~ owna 1415 H, i+

rIles log DATI1o01 51l6

I)

(IUI-40(-.141) pw2 RINOIS GUIam= UmW, UM"N To-43' to 52' 87%

52'. to 54' 54' to 5561 61%

5516, to 58' 45%

58' to 6319F ?7%

63' to 63161 100%

6316" to 69' 99%

69' to 74' 74' to 79' 791 to 841 96%

Boring No. 39. Dsdu Nuc. Pu Sta,

(IM-91-,4.1 I* I ILLINOIS GEOLOGICAL SUMVEY, URIANA hbm-Cole stwy by wg , Fkblav, 10-17 N~o cat 0 2-6 PENNSLVAAN. SYSiM Samdstoe, adunm to Ctart 9rnd, eatheed, partly soft, s *ined Sadstonl, modus to couse pained acceous most s agly caaeus In com beds, sligtly cuosabedde dakp* gry abonaceus d~stras geeally. c"ane to ver coae bol

'1; highly calae*a loer 2'1 coaly streak at 48' 524 MW=YCII SYS1M 1"cc1 of limesto, doluite, ad afeichart frapents, vpto 3" dwUjiamtrn alcameus, clays Itrix 5746 Doloidte, vuggy, broken Into ftramtý 2 to 3.ihes loN, p 1 grte iah tingse bmil of dolo steas abov in matri of slightly cal omu gP n, Clarey, slick ided shalo 6740 Was, Wnlom wUS, ligbt g;nish pql bedM It. agle.of but fu the vetical slickinldiss on 6T-0i beddog plaull $We 66' to 6'IoP Doloiite, MggmoreI a o less brkan atlw ild bilk*$ fn*=

6540 Co1oath dison Capanyat al.

I mPy l9r6 awO~t~ber GITN&. 1415 m Cor It* stCr dy

v s2 IWNOII MOLUM OIGAI AUV, NANA

' Imim

- P,,TII T! "

pbals mnlMoou psls, fInc-tod, with flecks on loal stnkud 77410 Male, nmoa ; usp dark gayi b had; lrl a leo ftures at VarwiIgale ocasionl ppitic and sacitic strak;bedighos Izo tal *'0 Botto of hole

ILLINOIS GIOLOGICAL SURVIY, UURIAA lawTWO- To No Sand, brown, silty Sandstone, brown, soft 0 23 Augered to 4 ft, to out caslng 4-0 Began coring at 4 ft, Sandstone, hard, gray) wIth some clay 29.0 Sandstone, gray, coarset, soft, Ath some clay sam 44-0 sandstone, fine, gray, with some Int mediAte thin black sems 4-.0 Sandstone, couse, gay, with some intermediate thin black seas -6 Conglomerate, gray liftstone aMd green shale, with some clay seoW 55-Limestone, gpy, honeyco6d Conglomerate, gray litestone and 68-0 green shale 71-0 Shale, gray green 73-6 Limestone, fine, grty, with green streaks, and with some clay seams 81.0 Conglomerate, gray limestone and gVen shale, with some clay seams Limestone, gray, with green steaks 10946 Shale, green, broken 114-5 Limestone, gray, fractured 113!0 Shalei ftk gry 1154-Shale, gray green, wth some lbmstoe9 fragments Bottom of Hole

'Ring" smple from I ft* 6 in. to 2 ft Hole caved at 36 ft. a*d lost soJe drill wter ME TIG G TION UAR COM ,1nelth Edison Company ot aI PA Dresden Nuc. Po.w Sta. 'g40 unwun October 1956 oovo 1416

,-Rmi Driller's log 516 5Al

.I50'S.1in.. A*'t ii 1-- - -"

9-..

y (U565-ZUM-141) y to 2 IUWNOIOEOLOGIOAL IURVY IM No. bm IM

+ Tm-Ti I =i Recovery 4' to 9' 95%

9' to 14' 14' to 19' 94 19' to 24' 89%

24' to 29' 29' to 34' 34' to 39' 92%

100%

39' to 44' 90%

44' to 50' 50' to 54' 54' to 67' 100%

67' to 72' 72' to 81' 100%

605%

81' to 83'6".

83'61 to 94' 94' to 104' 104' to 116' 116' to 119' 81%

k*ing No, 40 Denshn Nuc. PoN# Sta

IUflCLSOM~44~)~:

P"l11 ILLINOIS GEOLOGICAL $URVIT, UUAt4A IPIM T~m Y~ ~

Cm stdyby(r"e I. Ekbi, 10-17 0 4-0 ME) BY EN1GINWG SETION PFINSYLYANIAN SySTm Sandstorm, fle grOLn, slightly silty, flw thin stroaks of cmbon-ceous material, mry. 11.0 Same 0Mli to CUMrs grline4 gray; fin, g9milly hmizoltally bedded, flw hn streaks of carboacous 354O Smnditom, coarse glud, slightly cAlca*, thin streas of carbons mu Uterlallhoizontal beddin, gma 44.0 Sandstone, fir, to mdo~ pdaind, amooS streaks of 4a6-0 0ou6 material, gray -

aswitoA Very coast, pdmid, "Il-careut, slightly =Wi ddd ti sem. of cabonamas materalW, guy

= 100IIA SysTm keccla of limestont frsents, up to 3'$W)e ibnonalcaeus light Pm.s shal matrix; I fig01 *4 malli dles (sulfide;) about 3' bola top1 base of brecc makes a*le of abouto Wwito vortical v t*

Dolmite, file pained, finly vW1y light gray; fractures at anle. of Downy de kc Pw Se It al 40

~anl~mcoctobe.? l06ý nwo, cowi 1416 cm It*

'ýA1 ml C'@it.. ..- 6 -

2 MANO=MCA-O8*-LV)"

H ha i:~i .. ~

300 to 40 from vrtlal, os with genish surface becomes groonsh

,W pli lshin lowr feet 70 l

Shle, Donculcareou Penish gayl on a less shatte , Wmhnt sllckenslded 73-9 Limestone, fin painod, mottled pi*k and. pron, with green partings at agos of 450 from the vortical (

di)g); fraictras, lo with r crysWtlzd. calcite, also it high angles; at 90 ft. the a*gle of bd-dig' Is about 30 with the vertial

&Wat104 ft It IsnMaurly votical 1104 Shalle Calcareous, goeesh qgryl badly shattered; contact with lime-low, Above at lh 1114higho0 Limestone, like that above, but with Itasrous sealid mgu*nla vertical fractes; shap ) Wtct with shale below 113.

ale, Claacueous, dark gray; heavily shatted with high-an fractuoes 1H4 slickensddos Bottom of hole iAW-9 IQk*don pe.e,. Po ,"

'qI, ILOINOIS GEOLOGICAL SURVEY, URBANA Its, I1~im~ T~

Sand, silty, brom 0 26 sandstoe, come, bekeb, brM 7-0 walel MrY, sand and clarysy3 Sandatole, fine, gUy, aOucMs 94 streaks Sandstone, coarse, Oay Sandstone, fine, fracstuid, Fly Botte of Hole Reo*vay 2-6to4-6 77%

44 toN 5-6 to8-0 9Y m4 to 18.-0 100 be1by tube suwlt Irm 6' to 2160 Six days afte drilling, depth to Vito: 10 ft, 6 in$

TXPED BY IMG3MflG SETION

-- ,Couu alth IidonJlldI Co....

wouwOctobu19*6" , '. 1412

'" ,wmliv lloe'o lo loto PON :

1'*

(UiIo-ZDM-145)

P40 I ILLINOIS GEOLOGICAL SURVIY, URIBAA t -uI 1

Sand, silty, brown 0 2-6 Sandston", fine, very soft, carbon-ceous streaks Sandstone, fine, gray, carbonaceous streaks 8-0 Sandstone, coarse, brown 9-0~

Sandstone, fine, gray, carbonaceous streaks 11-0.

Sandstone, coarse, gray Bottom ofWhole Lost drill voter at 9 ft, Recovery 2-6 to 5 ft, 5 to 8 ft.

8 to 13 ft. 100%

Six days after drilling, depth to later 10 ft* 4 iat Shelby tube sample from 6' to 21611 TYPED BY ENGINEERING SECTION F7 I h oII, Commonwalth -Edison Company et al A Dresden CJlear Poar St*, 45 aun Mwmoctobor 19%6CUTN 1413 WHRDrilier's log IU+

a"10-3sx-4 ..55)40 1 Pip I GIOLGICAL SURVMT, UISAtA HIWINOIS 5bu luau T~ -

3 Sand, brown, silty Sandstone, brownj,. coarse, soft 6 Sandstone, gray, ftno, baud !SO Sandstone, brown, coarse -0 Sandstone, gray 2]

Sandstone, gray, da irk, with interu*

Wate thin black si 31-0 Sandstone, gray 44*6 Shale, dark gray 45-0' Sandstone, gray 45-9 Limestone, gray Vh ito Very soft 2? seam at 49.5 ft.

Lost drilling pwater at 49.5 ft. 60-01 Limestone, honeyco mbed, gray whlte, with shale sems 620.0 Limestone, fractu d, gray Adte Limestone, honeyc'ombed, gray white 67-6 Limestone, honeyc ombed,. gray white, with green shale seams - 70.0 Limestone, fract xed, with green shale seas 71-6 Limestone, shaly, greenish gray 72-3 Sale, green, sol I*, clayey 72.3 Limestone, shily greenish gray Shale, dark gray Bottom of h, ole Shelby tube amp le from 1' to 3' Lost drilling wtar at 49'6" Recovery 3' to 6' 6' to 11' 75% TM BI £NGM G*TION CW Comonmalth Edison Company et &1 PAN Desden Nuc Pow.. Stah N&49 u~Knawo Otober 1956 fONTo~

M" Dkriller's log L./,o. 516am qK'

)

(UUS-GK-14fl

~ 2 SUIIVTh IWNOIS OEOWUCAL oft -um 11' to 21' 99 21' to3l' 91%

31' to 41' 41' to 51' 51' to 71' 100%

71' to 81' 96%

ILLINOIS GEOLOGICAL SUMYY, URIAIA

-- "~1*0 ml_

To No

ore study by Gong.,l Iblaw, 107M Sandston, modlm egalud, watheed, browilsh, softW Sadstone, mostly fine to modium galotd, g*ray iMu uS thil bo acous streaksl bldqdg horimoutal sandtone, mort 104 0r less Cal"M~us, radiu to woant aid, with boncOus treaks, gray; eithe cros*a*dded a uniflMy bodded at dipi about 20 fta h Utl 6 sbull, 10ncaCAaMU, cazbonaceos, laminatod, very dark gray

,andstone, like that above 0 410 Limestoed oause* grufoed, 71-7e gray Dolamite, "g9y, gry with so ren, portlngs, 55 to 57 vertical frac=

tunh.wtb greon shale Infriactre amnat top Abottom "240 Dolomite, with preelsh Ashl layers, locally vuggyj grenish gruy; with vertical fractures, ealed Wn pyritlied through all but "apefoot 71.7

%alo$, calma , light punish gray 72,"

Shale1 W,he4 nonCAMlaes dark grayish bo~,n; some fracturs it WglS. of.150 to 468 from vertical 01-0 WotON of hole MrnaZ A N -

couam Cc061Monwlh Mdion. C~am It a1 FARM lbo powe Sul i~ x DATE wNa~gobo? 1%6 #a"ywo 1417

-AMewr Care Itud

~U16 5

C) 4-.

(S112541-440 V

IWNOIS GIOLOGICAL SURVEY, UUJANA -

Tw11111 Jb~ To o Sand, brow, silty 0 1-8 Sandstone, brown, soft, Carbonaceous streaks 3-2 Sandstone,. gray, soft, many carbon-aceous streaks .5-6 Sandstone, gray, mediun to coarse, carbonaceous streaks 22-9 Sandstone, gray, fine Sandstone, gray, mediu to coarse, carbonaceous streaks 45-0 Limestone, gray, honeycombed, fract" green shale seams 65u Shale$ green, sand 66-1 Sbhle, dark gray 72-0 Bottom of hole Recovery 118" to 5' 64%

51 to 81 72.

8' to 12' 98%

12' to 17' 9%

17' to 22' 100 22' to 27' 95%

27' to 32' 32' to 37' 97%

37' to 47' 100%

47' to 52' 90%

52' to 72' 10*%

TYPED BY ENGINEEING SETION

-- I ii i~i. -. -

aw~u Commonwealth Edison Compay et &I FrM esden Nuc, Pow$ Sta., 51 DATz Dm=October 1956 ": "

wwm Driller's log . "

wATu 516

ILLINOIS GEOLOGICAL SURVkY, UUANA lTo . .

km Cut stud by Gog.. Ib i 10 2-Sandston, fJin gaidd, "iWzoatifl b6dd4d, bMwV wLth *abonac0" patings So, pay with nrOuS cabborem6 -""

pati fgs .Wafew k sroatf

$weu few carboaceus partins b -66 74-SandsOn, "~dug to woas# pWInd calcuarou, pay with cubom us patingst, croesbedded; sap m@it&d it bwt OROVICIA St$1Th Doow*t vuqgyt with greep partigs, P871l not badly broken, but hlgh agle aw narly tiual h ctues bgiO at 514 1 ftactmoid from 45' to 461'?

Dolort, itb nueous gpm shale 614.

partigs,. gry; lowr 4 IncWe Pyrt 653 "alt, dolodtic, n Wuaet dk *ay*sh brom, with cal- 6 camous sp to LmmnLe fine.

tins 72-0 Bottom of hole TYPED B1 INGINMIG SECTION comm CoM tlth Eason COmR*pa #tI H-nk X.u*,ol usds Po 'yc.S ,Ota o 1418~t _

"51 Itudy 1TYCore

$16

y (uno-wM-1.u)

Q q,1 ILLINOIS GEOLOGICAL SURVEY, URBANA

.m ' ,,,,- i

_________I~hM ImU Um 1"4-T

-t .4-Sand, silty, brown 0 2-6 Sandtone, coarse, soft, brow 514 8-O Sandsone, fine, grys CAboCIeous streaks 11.6 Sawdstone, nediu to coarse, ray 11-9 Sandstone, very, soft, gray 13-0 :

Sandstone, coarse, gpay, carbonaceous streaks Bottom of hole Shelby tue tupl from 6 to 2'6" FiVe days after drillim, depth to water l ft.

Recovery 2-6 to 5-0 80%

5-0 to 8-0 M to 13-0 100%

TYPED BY EN~GINEERING SEITION il ill II -

MaMy Com"neth Edson Company et ml rmu*Dsden Nac, Pow, Sta, No53 F7"7 um oOctober 1956 omno, 1414 AWngo~yD1lae1' log

PUU_3011_ý

.1 ILLNOIS GEOLOGICAL SURVEY, URIANA loib To I if 3and, silty, brown 3-0 "pdstone, brown, fine, fractured B-6,

'andstone, brown, coarse, fractured 11-6 Sandstone, gray, fine, fractured 15-0 3andstom, gray, Corse 16W Sandstone, gray, fine, fractured, broken, carbonaceous streaks 32-0 Sandstone, gray, coarse, fractured, carbonaceous streaks 52-3

ýlMfitone, gray, fractured, vertical samns of green shale W63 Limstone, gray, broken, with green shale sens 57-0 lswtone, gray, fractured 760-0 Limestone, gray, honeycombed, broken, Limestone, gray, honeycombed, broken, fractured, green shale ms 82.0 Siale, green, sandy 83-9 Shle, darkEffSmi.. ,944 89.0 One day'after drilling, depth to voter 10 ft. 8 in.

Recovery 3' to5 '

5'to a' 72 8' to 12' 12' to 17' 0 17' to 22' 50 22 to 27' 27' to 32' 32' to 37' 97%

37' to 42' 10%

42" to 47' 9M RPM BY MGT ~ING S~TI0I **.**v*~

rE

~- -Ar cOWMVCOfonwalth Edison Company et at FMM Dresden Huc. Pow, Sta, No,69 4 4.

4 SI' u im m October 19 CmT Kula

..+.Nomniler's 1og00f,

-3.'4.1*,

~I.

(U11- lot41 ILLINOIS GEOLOGICAL SURVEY, URANA NM Ti .I ,

core twy by Gog E. ,law, 10."H No col PENSLVANIA SYSTE Sandstone, fir, paie, gray, With cakbnacowu Partings amd krm streakl; fracture fro 5' to 8' Sanstone, covopainked, e heaily 1 ."ostaled, bron, with hi* -*le fnctures 11-6 Same calCaeous, gray, oMe Marbons ceous partins; high-angle fractures fro 12' to 13', 17' to 221; badly Irken from 18' to 22' an 22'6' to

-ZI.highangle fractmie from 25 to 27', 30' to 30'6', &W$6' to 37' 37-4 Sandstoue, a, above but darka r ays not badly frictared very alcareous from 50' to. 2'4', 52*4 ORWVICIAN SYSONM Liumstn, -ammgrained, hgh-angle fractmsfilled with pen clay aW breeds, slickewides Dolomite, vuggyl with gree partings, gray; s fract id DlOhW* vwgy, oeru wM8 a grain 86.6 shal partings, grays lowe foot pyritic "aie, dlomitic,, fit,gren, slighti brcciated Miae, dark grayish brow, with cal-caeUM lpots MMDVW MIMM"MM 6

~Ccollwalth WIN oamplny ot 11

MM 10" RASenh. PON$ Rste a 69 A11 October 195 cu1'u419

. ,-.MFM o study

Q..

IUWI ~

~ -

lw I-47.' to 52' 52" to 57' 571 to 62' 100%

62' to 67' 92 67' to 71' 7i' to 76' 100%

76' to 86' 97%

861 to 89' 100%

, l....

lfl~Iv

.. WA A ul - .

S t.7EIW4l

-a- a ff" IV. W.

C (*o.*3+-.,I,44q "

34, ILLINOIS GEOLOGICAL SURVEY, URRAKA ha- i i k i MS 03.

Topsoil 0 Sand, mm~e, TFmly 1lot IOm Swndtone, Iroi to grq) m* I~ed ter lvl at4 ' .7.6 Sadstoe, gq 144 Sandstone, - ofts with thin cdq-sems 15.6 Sandsuton, MUMIA 8IS~M MAquoketa toaation Divine 1+/-mestone inerb Uuaton, 'a Iowar Wile $45-Siltatone, duk py; im this I; "seunof eqlhayb at 711-75' See aps - file no. 4103-072, 434, 4hsotý 1417 41ý1 1

- I~

waytm~ ~ vadt~UMso OM et d1 FAIMWDnft Nuoles bW~ Stgto Ng, I ITh~444 ATIDRUM Jne 1955 mmuikJ0

~4- 4 -J~

6 5AT1O t Iabimtw

[4~t~.f~I

pip ILLINOIS GEOLOGICAL SUMRYI, UUANA No. 3a 11. 1 o, 3A13, lie SW 31.7, 510,7' Topsol, Auk b O ad, "diutb'o zv9 UrAtone, prq-1cm ~.h1 10,,4.- W 1soium, am0',s*lin SWSE 1-7 3-4 0

31, 314 3.0 W.

S{o, U. 10001 L UrA,A Is, uIn, noJ,, 511,l' Topmill, bk *,N' Sddmlors 1roub.-Py 3.0 3-6 See ups -dan m 43,z3 fIN r uoo Powe Station biden 3OA OaTDll U~Jn 95ciio

%OWN~

J 4-9-410 Pa10 ILLINOIS GEOLOGICAL SURVEYt URANA kin No, 12-1000' 1, ine, 800 1S lins also3 R"g,*,oo ..

3dLI,1wil, m*r**,'1.

2.03 3-2 o0,134.6:0' 3 lie, 80' S. line 2, RIOT. 514,0' SW ýIvblackIP Topsoil.,

r COUNTY No..* J b= 1.6 2-9 SWeton, -eduil 0-1 3.0 Waterulevel 02 Ill NO, 144f1 1'.line, 3001, son 1W2. it KIev, 317. 5' Topsoil, blrAc sawetono, gry.bovCOUNTY NO. 2-9 goo 17-1f01 L line, 3101 So lIn 3, Kiev. 511.01 Topsoil 1-6 L.6 Saw, maul~ t UrIZo, lip' No. I 50' 3. line, 310' So lite 314~ 4,.0 io*e*,0, Topsoil 1,,0 1,.,

I USAon= COUT 0,10_

See UaPI - file nW, 4~103,0?, 13-1, a0ieot 1-.17 t - I om Cfomath, e,,u t.&L -..

.,A Ddn luolser PW Stati my Mlmob~~ 1955 ON wNmonDrMl18' 1ogs.?lttsub Testin

F*i 1W1H015 OLOGICAL SUMVY, UUAMA Toploil Doiastos See uaps - file m. 4033.172, u31, core #CL604 Stntimrphit pick by DRI &3D'?

N,+

Galea (Top) - 110' oo. Cmwm lth Edison OCp

'mDregan Wucl' Pom svtaton et &L uncm No.22 L-wJJ~J

OT,-i m 1955 ammno.

ATlo, O 3,3jS.1mi.

yd "n,,,-- --

S ILLINOIS GIOLOGICAL SURVY, URIANA NotsaMWe 0 5.0 Mqaquoeta ato Divin lisestanscan~Miq1Dota keoelated va dlsttab in zone Uno~tonle, saglllaco, ab oy 640 Odae, gren, 6-7 ShaUle pit 7-7?

Uzootmon, ~garlaoemu, greq5h R Shale, pepah grq to kv t1 11171; 23L~251 25.0 Shale u'eih-q; 0=amai bv~nti of pedIsb grq, dlm 40 shals limeato, brsiaed33 L~tmeto. wage vdwn Shale, guluh jrq; fra p stof s C01argsoe u t o, IJmsaton cocae 0olm ,

hAle, gp+/-Ah gun; boken; hllckenddes at 56,'6 56.6 Dolwite, Wa VIt d, hain Shale, gea~h p O.

otway0 omaneathE4+/-um cam sta&I FO wm bsdsncev poiisrtst~~um 2 D OIlu~tbtNo 1955 4- -4IO

WA1IOI 5050

(5U-3K-141)

UUAIIA MMVLYI IWIWIS OSOLCOICAL iiq mlllm m ho

'oWI Vq; bddlng at 45 to ax ofours 65.6 IDlver shge

$h~all h oiy;lcally alm s=9 fraotmv; bdly krk 68,641 JD5'1-nD' bed~izg at

,to azds of ago 0 16'.66 UsaI.ohd riock in f14t s=n)

W-.3 Glelon dolmite Dolcdte, maimu vatnW, bW, shleiotld.yupacIdp~t Im pocebusV mles; se tract bsdl troken 1251-1351 See maps -file no, 4103M,? U3-4, 4

-N (W1-~)

Q p tI ILLINOIS GEOLOGICAL SURVEY, URBAA J him Tit I Not HOW~ 0 ý46 YMquoketa fc'mation Divine limestone mer I.tone, coao pabned, hd,,

gra;l veatea 516K4-6 7u0 Ddo *te, udim rui*d bgld 4igt Vq; ame 1PIM daba 3 on pyrite; frao~ta-d 14L161 sue, fractmiwe uc1 wa .

Doladte, fle grald, lo%, U4, 8ligtly nw arq; prt'ugi md luti*ns of pm dab; a dI b aK* 281-29 0t Sola vwfiybl 7 '74' OIaeUsoft to Zito, fhalef TAM iahall Whl, silty, lo000] calmm 3943 laminted, fqi,~ lsh brow; fractied 34,61-33510 36L.3813, See uaps - Mie not W~]3.9212 X31, ýh*et 1-17 I-.

aOPANy OaoWMAlth !disou W# It dl h"Oa We ?a Stio No,24 +

)AT9E DMLLO Ots,407 1935 w"rNinc171 MDTH OcrIT i*i *q%14L &IWO.

'.SVflO 5M3 OcumMI.N 3301 1 061~~ '

(WlO-K-4.U)

I..

NPaI IWLNOI GMIO~CAL SUIVEY, UDANA 5.0 Topsoil 3340 See uaps - file no, 4103.172, 43-s1t I.

c~am~ Commoavath Wdson Om et al.

immureae buole Powi Statio m24 ma t.Nov. 1955 DAIDRJ coawn Pxfmbil1, Is ogPittiab~gh 1Tatiq

'd 3DI L lim. W1v 14..a a Im

ILLINOIS GEOLOGICAL SURVEY, URBANA

-TbO T Topsoil W1 bo~~ veathere itoem 0' 2.

Maquoketa f~wation Divine limestone member.

limestone, ma~ss gndW, her, light grg with DM AstowlIe; shale patings, styloites; ve veathiered frastar at 1710' Dolmte, sl p edbu4 finely 7uw, light gpy; g eh& alptings).fract~res at '6' 23t3',.261-27' 27.6 I1mwtone, pq vith.$.nkdsh BCIriVI 2k aidd~tolfine p9r" , 1ocflY elightly Ywo Pqiypa~tlns W7Awy~ naofpe shal~e; I hio-gl faoe s 3 Nutle cdasousom, soft to uftr lsdutabe, gmisah peen 36-0 Lower shale locall calc@eous pyish 414, See maps - file wo. 41034742 n3.l, bet 1417

)OMPaNTcalomieath IMao GoMq ot di kAim h~~I~lceg bwr Ststion N4~5-4 4 1~A1N51635

0231. lot45

<~1 y.

pl, IWNOIS GELOICAL SURVEY, UUAHA Topeoil Z-6, tLwstom 33-9 Sa&e ~4m.

N I

Cmw"vsa~th Elamo Ccow~ It AL.

"'mum oc~ te.Nov, 19355 w~

4 4imom~lf.?, log.PEttsbut Tsitin 4 4

. iMm. Cflt v It_- ja*ato?7 4

C) Q-..

Qo.-.*

0 ILLINOIS GEOLOGICAL SURVIY, UURA km P3IST= 373M Not Mpled 0 5.0 3=SUXIA SUM~

SaMletome coarse gralld, "it,~

dicaems, crosseet &TOY)'

Contatis coal partbing; ="cI~

siltutone 86"-9'2V see zap. -- fle no. 4103.072, nj-l 8+*oo*,1.17 sts 1-17

- U -

ýWmowmmmý cwrown eaomth m Osqt D4am~ $I, raa Drespgn hoiose Prhm tatto No.32 una ATSb1UotOT 1955 - uRKo BZVA1IO 512.01 t.

wrmIO Lflflt' -

fttI IWtNOlS GELOGICAL SulYrI, UR8AN Rol 16-301 V,Umn, 700' L.]e].

EM. 507,5 t Topsoil, tpe

- . 3 .0 Saqeo, brovnkm 4-7 Se Up's tit to. z13-~1,

~l Omm C.omth dlanowaIyt d, "A brwa halea Pow Wi ftt~

UT, MiDLEJunol9IC

C) Q Q (1rnc-IeM-2.5~ 4118 IfII IklmIl Pgl&l A%,.lFAI CHIIriY IIDRAMA Pipl Ih-IiWll IbV l" ewn'rII vnwIuw' RSST32SISM Not seo24 0 EMU"~hIA SIS1M Sa~etone, nedim gmlned soul, arossbedd, weathoWe, soft, Y~lOUwls timm Sandmetn, edim grained, icao e01%

crooobodWe, coal partWngg C Sa, cab ausm - -

UICIAN SYSM~

Maqoketa f~mutiom Divioln im3tof8 namber LI0Btow, Ccoase pinedl har ,

no)~ light grq; pen 0hal stylolites; grew shals MWle fta 2J.4%1-4T Ippitefs nU7' e 30t2l paahaoand prit. Ina fraotm, 391~"41'JD' om Ie*

D.19.4td medi 05; fr4tW, ll~t~;i~ aw shal 42'lDV.4I311; brJj oken 45 5g4 Dolaalto, fio uined, oat no) w , PC too 52 L32 IP F- Ishae ;a SAle, 4101ht c.1car.m, so to laminated, pm1h ea fract ir 144 583, I -

"mM Dreodea noleara9 Statio n.*29 OAiDmL (bts,4oys 9977 wm Cr st*d by Wo.c, wn~528 ~ .

hWflfn an

! (I41(A44.~

Iw lwNQI GEmmWD am, SAm lowr ohale gp7+/-ah brow; loWafl coac fraotin 6106 6ý4o See-mape - Mie no. 4103.912, n3-l,

Q ILIWNOIS GEOLOGICAL SUMVEY, URAIAM sa,~ WAWMý IM PMISJTO 933M Not sup*e a 2.6 FlIM7WIN SYSM Sdatone, Weim to Coare 9pr MiecOO~B, cosedd cuacWe below 7 ft., IrO1ldi imp, f~v coal Part~n8siWtSUaU 216 1 -416l~; M~' Wght2a we 2M 23 .23 131

uoketa frnation Divine limtne, =a urntons Coale pined, hear, light p'ay; Psrktbal part&D pyrltsat 28 ta~tmhs 29 10.

Dolot, Sa graue, be, 34gt gr'; W rem shals pi dhale *U1.

h, -eao§ouB, 4M laulnte&, pqJA soft to pao Mu Shale, ~ftt, gilty, 1ongtAt)l boim locJ McalcsoS; ua fractr'ee, seon others abmt 60, Welrb 4 a, u vtic0d to all of c"re; bfuao Is..

cowFM c~onveulth Bison 0onpa FUNM D"Oden 120le8r h mistation etKY0&I URM003OtoT,1f 1955 cowall~i I' III I L V V.I

= =AtolO I AI

(WIS-401-N4) miumm~lQWIgiomUlUN

~~,~ flM 71017; westored; 531, 5510*-581,fracturoe d 50'60 70161.71114, lit',

75121, 76.1111, 7813) 921 by1, WOe0e, a ab .e, "t ,in3 dark grayih *,rnm bly In at 8418,40t856', ~511'3'm; fractmes at 891', 93,161, 9M' Gtlen do1lpti Do1lcdto, aedl pVa1M, bedý nug IdaLa

&0 %WApacdptitp, PoC ,$ts,

~4

$801,Wn; frocme; prIte.

mwli fraet= at 1D9IS.=lDI ealcit..f-fea fraton no ric u11 4u; fractures at IV161-1; 135'(Pu.136t 94; ocore rkea a sle aop - ftle no, 4i03*G72, 431s, *oto J.l7

&/

IWINOIS GIWLOGICAL 5URVjY, URBANA sand -silty, brown Suadtone, fint .lft, gray 0 2-0 Sandsto", come, bIr 74

, soft Sdstoees fine, ay, taboiSCeOUS Sandstone, Coause, 9Mi Bottom-of Hiolt 12-0 Recovery 2.5 feet 81%

H" 8"42" 190%

six days after drillib, dpth ter 10 ft. 8 in, to Sheby tube simple 3 to 2 ft, TYPED BY aoGINfiG SECTION1 vcogmowsaltk Edison Coame T de bo.o?adStNo,4 "ar It 41 WIoM, October I1.956 wwano 1422 "M, Driller's log UVAnoON

=01'fnI~R ji

(1J10-40M-3.1, ,,

?qtI ILLINOIS GEOLOGICAL SURVEY, UUAKA

____________I1~wsmITwI~ i~r Saýdp silty, bm 0 246 Sdstoue, ore%, soft, 7.9 Sudstone, torso, gray carbonaceous 11-4 Sandstom, coarse, brown Bottou of Role Shelby tW smple fro 6' to 2'61 Very soft sea; 12' to 12'41 Recovery 2-6 to 5s0 5-0 to 84 8-0 to 13-0 94 Siays 10 ater rillng det to TYPE BY M(GIMNJIG SECTION I I omm"ufomaltb dsnCayit@

09T NLOOcobr 19% OU1N 1423 It line, 2m, V.14au ' I..

(Q OZ¶O lot, hP1 IWNOIS GIOLOGICAL SURVEY, URINA km Sand, silty, brow 0 2-Sandstone, oast, softo brom w-Sandstoe, fine to mUdIV, gray, car. 13-0 bounctous streaks Bottom of Hole Ramoery 246 to 5-0 53%

5-0 to 1-Role caved after 24 bours TYD BY &IlNXIflNGSETION I~I w"MMI Colmomwalth Edison COpn It &I PFUNDIdIn IlUCe Pfow StA. Yo.48

= m cogber 1956 commyi. 1424 lU~owT Driller'slg W~fON

I I -

m)~vu~~ .3 IWNOIS GEOLOGICAL SUIVEY. UUA~L&

rip,

..--- --- '--U

-ý I - , .. I. URBAM

_ + ,

Sand silty, grayish brown 0 3-6 Sandttone, brown, soft, coarse Sad, brown 7-6 Sandstnel, gray, fine 11-0 Saodstone, fine, gray, with brown texture Sandstone, pray, coarse, with thin black seams 50-9 Sandstone, gray, with coal and slate mixtures

-Shale, gray and green, soft 1*3 Clay,, with some gravel, gray, Limestone, gray, with shale ms 544 Limestone, pay 66-6 Liestone, gray, honeycombed and fractured, Shale, gray green 914 0:

Shale, dark gray, fractured 9604 Bottom of hole Lost dilling wite at 52 ft, Shelby tube samle from 1'6' to 3I6" Eight days after drilling, depth to Water i ft, Recovery 3'16 to 6' 83%

61 to111 68%

Iii.to 21' 100%

21' to 31' 91%

31' to 41' 97%.

411 to 51' 95%

51' to 577 53' to "/2' 0 57' to 72' 100% "YPM1 R - -4

~wam Commoealth Edison Company ft &I*,

Waikesden Muce Pow# Sta s& 50 Un mnOctoberlMImwc' 1956 *1'

-uio1,Uhrs o

C, C.. C':

(156-2UL-44fl..u IWNOII BWLO9WA sumY UW0A 72' to 77' 93%

771 to 871 100 87' to 92' 93%

92' to 96' 100 Boring No,.50 Dresden Nut, Pow', $st

(Uflb-491L-FA) 41 ILLIOIS GIOLOGICAL SURVEY, URBMAN i~~rao .mw ._ .. Ti

o$ Study by "oIEt ,blav, 1017-51

?EMILVANIM SYtMK Sadstonpe mostly odit. gained, browish gray ,.

Sandtoneflin grndd Pay 8 sawdstone, calc oust modit. to coarse gaineod, tn carbonmous streaks, horizonal o lova1 beddM g,gray 50 Conglueaset, dark gray shale, with fragents of limosto, (my be w,,h tred-zone on limestone) 5$.

OROVCIA SYSTEM Leone, eAw piW* rystasl gray E.~.

DolWmte v4s.y-.py .with enmish streaks; few fractwal Y; ery"ug atbe 65ba Sol, wdth gprmenisao laeous dolanlto; iot fractures hall, greenish

le, dark grayish bmml some hi*g ngefractores Bottom of boll TIFED BY ENGINEWD1 SETION

ODr CGonwualth rawm COR et aI S Drsda fnacePw,n o WO , '

'AlN*..O 19H ..- 1421 A -Cim study 516 w M,

j

-OUI-)40 41 ILLINOIS GEOLOGICAL SURVE, URIAtA f 1'~

~-

53W jT~m~

'I - ~-

~ I-4.-

Sand, silty, bo 0 2-0 Sandstone, codu, soft, brow 2-9 Sandstone, o~dium to toazs0, brown, 8-3 flecks Sndstone, tine, grayt carboictous 10-0 str.eaks sanditone, coarse, gray is.

Bottom of hole Recovery 2 ft.to 5ft, 66%

Sft. to 8 ft. 75%

8 ft, to 12 ft, 100%

water 11 ft* 4 in.

TYPED BY EKGZW~IG SETION I I -

a~m'f Cnomneaith idiSOR Capany It&I Fiftjresden Ruce Powe State05

~IDMM0gctober 1956 wmawnc 1425 palom" rle' o

. - N (W1~3 lotW~

kPI ILLINOIS GEOLOGICAL SURVIY, URBANA ri

~ --

ýand, silty,' brown 0 Usdtone, coarsep hm , and brm 2-0 7-0 fl*cks Andstone, fine, brown, a&W brown fledl I

andst*ne, fie, gray, bonce us 10-S o

-0stre tak 3andstops, coarse, gray, carbonsceus l21 Bottom of Role Recovery 2 ft. to 5 fto 66%'

5ft. to 8 ft. 81%

3 ft. to 12 ft.

Five days Ifter drilling, depth to water 1I ft. 1 in, TYPE) BY ENGINXING SETION mmonwalth

o Edison Company et aI AODinsde Nuc, Po..l, St. NO.

+ . 4-

-I 4-RDRLtM October 1%56 c"w"omi 1426

, H.. .Driller's log +4-It N.'.. lna, lo w. 4 4.

u-- urn 4.4.

1) (ZlZI-JOM-3.U~

411 ILLINOIS GEOLOGICAL SURVET, UUANA 8bI~ lhhIum T~ ~

uandp b"Iffil silty 0 34 3andstone, browm coaus 4.2 Sanstone, brown, fines, fracture

ndstone, brom, coaris, fractwe anstone, pgry, fine to udliv, high- 10.0 angle fractues arbonaceouf seam 10-1

an6tone, gray, odim to come, 11-0 high-angle factures Dottom of hole Recovery 3 fit. to 5 ft*

5 ft. to 8 ft. 75%

3 ft, to 11 ft, 95%

TYPE BY ENGIHEIflG SETION

~tm b- ~-

amP Cmoemalth ison t &Ial Ipny WrDsdob Nut. Pow., Sto. R04%

DAhomum Octob 1956" cowgiNo. 1427 M~lowDriller's 10g ;1.,

14.5 5IAIC

(1.,GEOOGCA) Ito*UA I p,,, ILLINIOIS GEOL.OGICAL SURVEY URBANA No remitt I To [9" TMl - 4?S ;I 0 32 Limestone -*DN,tis- 32 36 shale - d~f Je 36 160 Limestone- R 160 220 No record 220 TD Role Record: 8" 0-50' 4-7/P 50-2251 Caing.: 51 0-50' cemented Goef aquifer: dolomite from 160-2201' XODping level 57' below measurlng point after ptpeng at 7 gallons per minute ftr 3ý hours Heaaurlng point for test-, ground 3infa& e NO MWOPE I- I~

U.S Amu Corps of bgiaeve All to.

Dresden Locke &Do April 1972 Ogm ",2125 MToir,,

ea11ns 510,*,'Q.L, M'NaflbR

111111-M-14137-i 4101

)101 ILLINOIS GEOLOGICAL SURVEY, URBANA

____ I -

Mw

__ __ __~TW i 351 to soapstone (LJcvSh'1) 105' to limestone 6,(e Total depth 190 Iasing: 48' of 4" galvanized.

JMLOPE i- i I

QNPAy IJ.. Anderson AyIt1 Pmu nuary 3t,19 No, F~II M.2001 CONUP

~N~1RJTY State Water Survey 4 CIMATRI wN P

0 y II#U-40N-441)174 .*i2 ILLINOIS GEOLOGICAL SURVEY, URBANA

,emiit #5~118 WINt Drift 29 29 Shae 51 80.

4M Sand ý165 653.

sble &sanqy lme S89 742, Lime 146 788 Casing: 22" 12" 150' cented in plao8 I i0" - 647-708',

Size of bole 2311- 0-91',.

1 150',

12"- 708',

10"- 788'.

Well Test Data Sheet filed#

- ,- I -

cOIPANY Wehllng Well Works, Inc.

vAaI Gemnera Electric Co.

DAREbuLmOctober 31, 1968 MU 1519 AM~ORIT V tLIYATIU0

"RCE BWILDIHG, S*PRNGFELD, - i/VI

'URVEYS SCTION, BE SURE TO

/-

K) K)

GEOLOGICAL WATER SURVEYS WATER WELL RECORD Copleted 5-22.68 i0,Dept. Mies and Minerals pemit No. ý685 Yea

11. Property owner 0,,si.ffi " Aid, W61110.

.Address Norris, T11,

-&h"--or T Vf No. 9&56..

12. from DWMTE rftei 13. Comtyb.im...

at depth il to..1t. Sec...

14. Screa : Di, .__.__in, Twp. .

Lenoh:_._ ft. Slot, ,.

13,. Cas~namg I ri~ pe Sea Level Dim (h) End " We.ght

,d P ,If- To)"(FL)

- . (-' LOCAMTON IN ICmeed in I L -III- -I

16. Size Hole below casing: ....... I*n,

17. Static level j.Jift. below cuing top which I . it. I, above ground level. Pin level . Z.ft. when PUMiP at_.L_ I;...,

gpm for _.. hours.

18, FORMATIONS PASSED THROUGH DIP8n;101 e

Dlirt6" P SWae 6 10 Ida283 (CONTINUE ON EPARUAT T S"T It NICtKUY) iia -

SIGNED We1linV Well Works, 12s, DATE ES I B I,

f hol ,ILLINOIS GEOLOGICAL SURVEY, URB"A jflkhmj T~ I~

461 to soapstone 2115 to limestone Total Depth Water leveli Ilow ItC' i - k~

nuhmfl 2014 Rtate Water 8sirv IVAT14%

/9 I lre~Thlok,.

Formatponpeod through rn Dt .

q tow i:

1'11

,,.-. 3o.,.

... . ,ml ,i S.S.52732 Received from Naperdille Offices 3-2-66 8t SWz hole below cusie jneh Statk leve from u4 .J Tested capacityl.L.......... per min. Tempenare S1 '..~L water lowered to i rl mn Length of ta -L -n -,i

[ohm inction III Sudan Phot Township sm'________

4 0a~1 of ~~eriM

~1

(-4

oall-M-4-4111w W

hpi ILLINOIS GEOLOGICAL SURVEY, UDANA No record Soapstone 32 Limestone 60

,,W Water levelt flow Casingi 36'6" of 4" so M03OP 2o,

.,'VUIV~tY State Water BUTv

~vAMI

K)

U111)-4)1 o pq,~ ILLINOIS GIOLOGICAL SURVEY, URBANA No record 20 soapatone Limstae 90 Water 1eveL1 flow

~1.

Cai.51 6, of 4 ATI DI~tu 449y M.2020 u~ni StAte Wi~te S.iT 4

+

4)

P"Ip ILLINOIS GIOLOGICAL SURVEY, URBANA 32' to aoapotone 37' to limtone 2btal Depth 267 Water levels flow Cauiug: 42V of iV I;?

NO XNYPS 7

VIhQRNY Itt ~4~Brs 2D2, -t .O2

'IAT'WOctoer5

lpf ILLINOIS GEOLOGICAL SURM, URBANA

........ OLOGCA URVE U, r ttNAT0 I 7 ,¶,-

._ _ _ _ _ _ _ _ _ T_ _. E,.

26- to soapstone 88' to limeatone btal Dpth 200.

Casing: 30' of 41~

AtýW

(,4~(QV

~

tLocatlon questionable.

NO IvEMPS

... I - I . - -I GIPANY J-~ -

LO 'AAR (b)(6)

No.

Corny IL2023 Tfly state Vitor 8TqV ATow mo

9 ILLINOIS GEOLOGICAL SURVIY, URBANA Drft 10 Oradite scapatone 97 Liwtne TD C0284g 3y' of 41 b.

ýI No mDPE

10PANY

/

iRE NO.

2D24

'ATERIUjT UTYN

'V tw (IgIfl-iQ~t--)4r~IT4*

et, ILLINOIS GEOLOGICAL SURVEY, UUANA kumI Soil - -17rf, 25 sandstone -PeM 0ýZ 30 Granite (Te) 1 ts~~hL 65 soapstone (- () 77 Limestone -~((-( v( 1W9 TD Water level - flow io EMVLOPE I -

DMANY q Allia AR uhuctm DR1Ui State VaterSurve CHOY9OIL 1999 *.i-I

~I**

I I MIATION

,411 ILLINOIS GEOLOGICAL SURVEY, URBANA

%= To ~

Amerock 26 26 3oapstone - LJLd-~'kJe. 67 9, Amestne - ~4~1j. 110 203 TD 711 No EVLOPE I i~

0IPANYT.F.

Anderaon

-ARK State of Illinois u 0 Fobrua 41 1929 Iri 2000 StAte Water Smq -~

"518TM wu wU10P

Q I~ ~.'.'1 I

'aem'mee:IP'm*Pk.

l T .*.,C- "

..." .. i 14.

1

, ~

mu u~~

ki Rhpaa hiyffim- 0*1 I ~

I (2A&

+/-

T.

~~~~' rIKL.~ ~;;

7 t .1l )1 W" 1-f- ý, . 4-+-4P:Rh4- if* 1P14 ' OPURAWY4 44-4 t

I4~

I'

'4 y

(.

Pop I ILLINOIS GEOLOGICAL SURVEY, URBANA m~im1~wL~.

-F 60' to soatone 136'1to lmetone Total Depth Water level - flow Caig 134' of 40 yLc.

Wc~ation questionable. Osbomen lmý Not amon e,

_- I -

DIPWY 1LL1n nrno UrNORIT State Water Omrq 'a','

JMAYMN

V I

~b~MuwCuV4~wwWDwUw wi ~

-~

M

- '-s------ I L..~.

T~WN~ H TOWNSHIP CO$LECTOR '~' PATZDRULED~ t ~ ~

AILI i RHt$

_JI i o~, \

_ _ _ _Al

ýV' ":i, V C'

(126411-Q-141)

Pip t. IMWNOIS GEOLOGICAL SURVEY, URIANA To~

4,fBdied by P,M, Busch 4/51 PLEISTOCENE SYSTEM Till, calcareous, yellowish grq 5 Shale, calorfeo~us, grayi sh 1gee.5n,m* ,, * , 65 70 ORDOVICIAN SY*TE, Maquoket Tform~tih 0Dlolmi e-,fial'o vlouB, light PAT fti onarse; cal-cite ,, 40 115 ht In11. ... ,

gr.ti 1ec~c~ulight INomfi

[brown f4ne1 toaa',se 5 120 Whale, doom ti g ayish geenltE.gyish btomn, weak ;

15 1(m gray to grayiah brown, weak tof rd & 50 185 Galena formation I Dolomite, pale yellowith brown, fine to coarse Dolomite, calcareous, pale yellowish brown to light gray, fine to coarse; cal-cite, at base 25 50 210 Dolomite, calcareous, yellow 0 Dolomite, yellowish gray to.

VI yellowish brown, fine to 15 - ___I 570 1u1r5u I

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Appendix Historic F Tritium Concentration Data (Not Included)

Appendix G Mass Flux Calculations

/

GROUNDWATER TRITIUM CALCULATIONS

Project No . 2 ". -"

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Hydraulic Conductivity, K 3.29E-02 ft/min (slug test result at DSP-1 57S)

Hydraulic Gradient to East, i. = 1.40E02 it/ft (local shallow gradient)

Hydraulic Gradient to West, i, = 8.60E-03 tift (local shallow gradient)

Calculate darcy velocity, East of Breach [ West of Breach 4.61E-04 it/min 2.83E-04 ItImin v = Ki= 0.66 ft/day 0.41 tVday S0.20 m/day 0.12 rn/day Modeled Distance April 8, Planes Distance Modeled from 2005 along from July 31, 2004 Planes along Source Tritium Plume Wells Source ftll Tritium (pCi/L) Plume Wells (ft) (pai-)

1 W-3 20 6,125,000 1 W-3 20 244 229 2 W-1 and W-2R 33 3,600,000 2 W-1 and W-2R 33 260,948 3 T-6 and T-7 54 1,168,750 3. T-6 and T-7 54 422,424 4 T-3 and T-5 61 40,274 5 T-1 and T-2 73 134,034 5 T-1 and T-2 73 7,533 6 R-1, R-2 and R-3 100 3,643 6 R-1, R-2 and R-3 100 2.108 7 E-2, E-8 and E-9 118 1,850 7 E-2, E-8 and E-9 118 1,071 8 E-3 and E-10 138 772 8 E-3 and E-10 138 1,142 10 DSP-124 230 4,060 9 E-6 and E-7 180 1 3,989 10 DSP-124 230 91,166 Modeled Distance April 25, Planes Distance September 3, Modeled from 2005 along from 2004 Tritium Planes along Source Tritium Plume Wells Source (ift) VpL) Plume Wells (ft) (pCViL 1 W-3 20 10,312,000 1 W-3 20 183,000 2 W-1 and W-2R 33 2,590,000 2 W-A and W-2R 33 204,000 3 T-6 and T-7 54-- 1.093.500 3 T-6 and T-7 54 134,000 4 T-3 and T-5 61 111,000 5 T-1 and T-2 73 96,500 5 T-1 and T-2 73 8,000 6 R-1, R-2 and R-3 100 3,333 10 DSP-124 230 55.000 7 E-2, E-8 and E-9 18 2,000 Modeled Distance May 3, Planes Distance Modeled from 2005 along from October 25, 2004 Planes along Source Tritium Plume Wells Source (It Tritium (pCVL) Plume Wells (ft) (pCi/L) 1 W-3 20 4,931,000 _ W-3 20 .171,000 3 T-6 and T-7 54 354,000 2 W-1 and W-2R 33 199,000 4 T-3 and T-5 61 103,000 3 T-6 and T-7 54 45,000 5 T-1 and T-2 73 58,000 5 T-1 and T-2 73 130,000 6 R-1. R-2 and R-3 100 8,500 7 E-2, E-8 and E-9 118 .2,500 8 E-3 and E-10 138 1,000 8 E-3 and E-10.. 138 1,000 9 E-6 and E-7 180 1,000 10 DSP-124 230 NM Modeled Planes Distance November 22, along irom 2004 Tritium Plume Wells Source (ftl (pCi/L) 1 W-3 20 542.667 3 T-6 and T-7 54 573,705 5 T-1 and T-2 73 21,026 6 R-1, R-2 and R-3 1"100 1,502 B E-3andE-10 138 1,001 10 )SP-124 230 12,869

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"V BIOSCREEN Natural Attenuation kecision Support Systerr EXENW-18511-400 Data Input: nstructiOns:

Trafo" Wst oI ea. Enter value ditectly;:.oAr Ar rurce center for trivilonMenial tKellunCe versm1 .4.

y) ,. - .V.e2. Calculate-by lhindl 1,IHYDROGEOLOGY 5. GENERAL Seepage Velocity* Modeled Area Length' or ..ModeledAtea Width*

Hydraulic.Condudivity K VE-2%(cm/seq) Simulatin lime Hydraulic Gradient -, I .(Do't

.. enfte any data).ý 7 "- . 1. .- I . .

Porosity 6.SOURCE DATA Source Thickness inSat26ne'F 1700~~ Vertical Plane Source: Look at Plume Cross-Section

2. DISPERSION Source Zones:r end Input Concentrations &Widths Longitudinal Dispersivity Widt' t)conc. mQPO for Zones 1,2,and 3 alphayx 12.7(M Transverse Dispersivity' Vertical Dispersivity" OE~phe2 0.0(al) or 120 120001. 4. .

Estimated Plume Length Lp 255i(4

3. ADSORPTION Retardation Factor' s, I 0 fri" '":"i.,'.i.::i =. Pf eLoo1.

View obf ng6own.

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-Soil BkA Density rho -NA] (kog),Soluble10001 nfinit (K4g) O'bseivdcnaieciIefrln tMnon el Pardition Coefficient Koc. NA 0L9) In NAPI, ource Soil INo aaLe eBahor Enter,;.'

FractionOrganicCarbon foe: NAj(0 7.fIELD DATA FOR:COMP*A*8 1 Concetain:*nim* g"l .. -....

4. BIODEGRADATION )ist. from Source (fl=

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Ist Order Decay Coeff' lambda I(peryf or 8. CHOOSE TYPE OF OUTPUT TO,SEE:

Solute Hali-ife t-half L~(yeal Recalculate Ti or Instantaneous Reaction Mode, RN RNAHelp E: Sheet Delta Oxygen' DO Delta Nitrate' N03 1J(Mgit). ~ CETERLNE ~Paste Example Dataset Observed Ferrous Iron' Fe2+

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D1ssobVE HYDROCARBON CONCENTATION ALONG P'LUME CEN*TERLIN (wgIL tZ---))

DiitancefrOM SPYrc (i) ol TYPE OF MODEL 26 r51. 77' 102 128.1 15 79 I 204 230V I 255 I U

I g J I - I No Degjadatio~12.OqOE+05l 1,57E+05ji.24E+05 1.05E+0519.32E*0418.44E+04 7.77E+04 7.24E+04 6.80E+04 6.43E+04 6.12E+041 1st:Order N6cyj 2.OOE+05 1,57N~51 1.24E405 1,05E+05 9,27E+04 B.38E+04 7.70E+04 7.16E+04 6.72E+04 6.35E+04 6,03E+04 Inst. Readton~ 2.GOE+05 1.57E405 1,24E+05 105E+05 9.32E+04 8.44E+04 7,77E+04 7,24E+04 6,80E+04 6.43E+04 6'12E+04, Fiel Data from Site~ _- - - -____

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EXENW-18513-400 11/21 Plane 1 WI W2R J Calculate mass discharged along a plane through W-1 and W.2R:

Mass Total Mass Discharged Discharged Tritium Concentration (pCl/L) Mass Flux" per Area*** through Plane Sample Date W-1 W-2R Average (pCI/m 2 /d) (pCi/m 2 (PCi)

11/1/2003 3,600,000 NM 3,600,000 4.47E+08 0 0.O0E+00 7/31/2004 3,600,000 NM 3,600,000 4.47E+08 1.22E+11 3.40E+ 12 8/28/2004 703,375 NM 703,375 8.73E+07 7.48E+09 2.08E+11 8/3112004 2,348,000 .. NM 2,348,000 2.92E+08 5.68E+08 1.58E+10 9/3/2004 2,590,000 NM 2,590,000 3.22E+08 9.20E+08 2.56E+10 12/2/2004 NM 48,000 48,000 5.92E+06 1.47E+10 4.1iE+11 1/4/2005 NM 16,000 16,000 (1.95E+96 1.30E+08 3.62E+09 2/1/2005 NM 301,000 301,000 3.73E+07 5.50E+08 1.53E+10 3/11/2005 NM 284,000 284,000 3.52E+07 1.38E+09 3.84E+10 4/8/2005 NM 260,948 260,948 3.24E+07 9.46E+08 2.64E+10 4/26/2005 NM 204,000 204,000 2.53E+07 5.19E+08 1.45E+10 5/3/2005 NM 199,000 199,000 2.47E+07 1,75E+08 4.87E+09 5/19/2005 NM 182,000 182,000 2.26E+07 3.78E+08 1.05E+10 Total Mass Discharged to Groundwater 4.18E+12 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration

"*Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

- - Assurned area of plume:

Width = 30 ft Area 300 ft2 Saturated Depth = 10 ft 28 m2 5.OOE+08 4.50E+08 4.00E+08 3.50E+08 I C0 X 3.OOE+08 4 2.50E+08 2.OE+08 1.50E+08 1.OOE+08 5.OOE+07 0.00E+00 Ou, 0~

00 ~ 00 V000 0 0,070 Date a

EXENW-18513-400 12/21 Plane 2 W3

) Calculate mass discharged along a plane through WM3:

Tritium Mass Total Mass Concentration Mass Discharged Discharged (pCi/L) Flux" per Area*** through Plane 2

Sample Date W-3 (pCijpm id) (pCi/m2 ) (pCi)

11/1/2003 6,125,000 7.61E+08 0 0.00E+00 7V31/2004 6,125,000 7.61E+08 2,08E+'11 7.72E+12 8/28/2004 3,551,350 4.41E+08 1.68E+10 6.25E+11 8/31/2004 4,908,000 6.09E+08 1.58E+09 5.86E+10 9/3/2004 10,312,000 1.28E+09 2.84E+09 1.05E+11 10/25/2004 4,931,000 6.12E+08 4.92E+10 1.83E+12 11/22/2004 542,667 6.74E+07 9.52E+09 3.54E+ 11 1/4/2005 177,000 2.19E+07 1,92E+09 7.13E+10 2/1/2005 129,000 1.60E+07 5.31E+08 1.97E+10 3/7/2005 92,000 1.14E+07 4.65r+08 1.73E+10 4/8/2005 244,229 3.03E+07 6.67E+08 2.48E+10 4/25/2005 183,000 2.27E+07 4.50E+08 1.67E+10 5/3/2005 171,000 2.12E+07 1.76E+08 6.52E+09 5/19/2005 161,000 2.00E+07 5.11E+08 1.90E+10 Total Mass Discharged to Groundwater 1.09E+13 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration "Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

- - Assumed area of plume:

Width = 40 ft Area 400 ft 2 2

Saturated Depth = 10 ft 37 m 1.40E+09 1.20E+09 -

" 1.OOE+09 c38.OOE+08 S6.ooE+08 w 4.00E+08 2.00E+08 0.00E+00 - . . . . . I .

Date

EXENW-18513-400 13/21 Plane 3 T-6 T-7 Calculate mass discharged along a plane through T-6 and T-7:

Mass Total Mass Discharged Discharged Tritium Concentration (pCilL) Mass Flux"* per Area*** through Plane Sample Date T.6 T.7 (pCim2 Id) 2 11/1/2003 1,960,331 377,168 Average 1,168,750 2,36E+08 (pCI/m 0 ) (PC')

0.00E+00 7/31/2004 1,960,331 377,168 1,168,750 2,36E+08 6.45E+10 2.76E+12 8/28/2004 598,986 419,783 509,385 1.03E+08 4.75E+09 2.03E+11 913/2004 1,229,000 958,000 1,093,500 2.21E+08 9.72E+OB 4.15E+10 10/25/2004 354,000 NM 354,000 7.15E+07 7.61EE+09 3.25E+11 11/2212004 573,705 NM 573,705 1.16E+08 2.62E+09 . 1.12E+11.

1/4/2005 15,000 NM 15,000 2.97E+06 2.56E+09 1.09E+1 1 2/1/2005 53,000 NM 53,000 1.06E+07 1.91E+08 8.15E+09 3/8/2005 17,000 NM 17,000 3.37E+06 2.45E+08 1.05E+10 4/8/2005 422,424 NM 422,424 8.53E+07 1.37E+09 5.88E+10 4/25/2005 134,000 NM 134,000 2.70E+07 9.55E+08 4.08E+10 5/3/2005 45,000 NM 45,000 9.03E+06 1.44E+08 6.16E+09 5/19/2005 45,000 NM 45,000 9.03E+06 1.45E+08 6.1 BE+09 Total Mass Discharged to Groundwater 3.68E+12 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration Assume constant discharge between most recent sampled concentration to present

- Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

- - Assumed area of plume:

Width = 46 ft Area = 460 ft 2 Saturated Depth = 10 ft 43 m2 2.50E+08 S2,OOE+08

'U

.I .OOE*08 7- 5.0OE+07 0.OOE+00

/7 000 0 7,1-17L,01 -- --

Date

EXENW-18513-400 14/21 Plane 4 T-3 T-5

j Calculate mass discharged along a plane through T-3 and T-5:

Mass Total Mass Discharged Discharged Tritium Concentration (pCIIL) Mass Flux* per Area*** through Plane Sample Date T-3 T-5, Average (pCilm21d) (pCilm2 ) (pCi) 11/1/2003 38,885 41,662 40,274 8.08E+06 0 0.OOE+00 7/31/2004 38,885 41,662 40,274 8.08E+06 2.21E+09 1.02E+11 8/28/2004 119,763 404,437 262,100 5.29E+07 8.54E+08 3.97E+10 9/3/2004 95,000 127,000 111,000 2.24E+07 2.26E+0B 1.05E+10 10/25/2004 NM 103,000 103,000 2.08E+07 1.12E-09 5.21E+10 5/19/2005 NM 103,000 103,000 2.08E+07 4.28E+09 1.99E+1I Total Mass Discharged to Groundwater 4.03E+11 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration Assume constant discharge between most recent sampled concentration to present "Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

'*Assumed area of plume:

Width = 50 ff Area 500 ft 22 Saturated Depth = 10 ft 46 m

ý6.OOE+07 5.OOE+07 J i-4.OOE+07 a~ 3.OOE+07 x

S2.OOE+07 rt1.OOE+07 0.OOE+00

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EXENW-18513-400 15/21 Plane 5 T-I T-2 J Calculate mass discharged along a plane through T-1 and T-2:

Mass Total Mass Discharged Discharged Tritium Concentration (pCUL) Mass Flux" per Area*** through Plane Sample Date 7.1 T-2 Average (pCilm2id) (pCi/m) (pCi) 11/1/2003 7,473 7,592 7,533 1.46E+06 0 0.OOE+00 7/31/2004 7,473 7,592 7,533 1.46E+06 3.98E+08 2.OOE+10 91312004 10,000 6,000 8,000 1.55E+06 5.12E+07 2.57E+09 1012512004 NM 58,000 58,000 1.17E+07 3.44E+08 1.72E+10 11/22/2004 35,043 7,009 21,026 4.19E+06 2.22E*08 1.I1E+10 12/2/2004 3,000 3,000 3,000 5.42E+05 2.36E407 1.19E+09 114/2005 43,000 4,000 23,500 4.69E+06 8.63E+07 4.33E+09 2/1/2005 46,000 5,000 25,500 5.09E+06 1.37E+08 6.87E+09 3/812005 131,000 4,000 67,500 1.36E+07 3.27E+08 1.64E+10 4/8/2005 262,990 5,077 134,034 2.70E+07 6.30E+08 3.16E+10 4/25/2005 189,000 4,000 96,500 1.94E+07 3.95E+08 1.98E+10 5/3/2005 252,000 8,000 130,000 2.62E+07 1.83E+08 9.16E+09 5/19/2005 241,000 4,000 122,500 2.47E+07 4.07E+08 2.04E+10 Total Mass Discharged to Groundwater 1.61 E+1I Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration

- Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

- 'Assumed area of plume:

Width = 54ft Area = 540 ft2 j Saturated Depth 10 ft 50 m' 3.OOE+07 --

2.50E+07 12 200OEt07

,S 1.50E+07

'~1.OOE+07

A 5.006+06-a.OOE+00 V'?

u 00 L, - .~- - 07 ý00,%

, q,;-,0 CýPh 19 7 70 07(, ,r I9.

Date a

EXENW-18513-400 16/21 Plane 6 R-1 R-2 R-3 Calculate mass discharged along a plane through R-1, R-2, and R-3:

i'Mass Total Mass Discharged Discharged Tritium Concentration CUL) Mass Flux per Area*** through Plane Sample Date R-1 R-2 R-3 Average pCim/d)** (pCi/m) (PC)

11/1/2003 1,280 3,591 1,452 2,108 3.61E+05 0 0.OOEQ00 7/31/2004 1,280 3,591 1,452 2,108 3.61 E+05 9.87E+07 5.50E+09 10/2512004 5,000 12,000 NM 8,500 1.65E+06 8.66E+07 4.83E+09 11/9/2004 NM 1,000 NM 1,000 1.37E+05 1.34E+07 7.49E+08 11/10/2004 1,000 NM NM 1,000 1,37E+05 1.37E+05 7.66E+06 11/22/2004 1,001 2,002 .. NM 1,502 2.39E+05 2.26E+06 1.26E+08 1/4/2005 NM 9,000 5,000 7,000 1,35E+06 3.42E+07 1.90E+09 4/8/2005 1,127 5,866 3,936 3,643 6.72E+05 9.50E+07 5.30E+09 4/25/2005 1,000 3,000 6,000 3,333 6.09E+05 1.09E+07 6.07E+08 5/19/2005 NM NM 4,000 4,000 7.44E+05 1,62E+07 9.05E+08 Total.Mass Discharged to Groundwater 1.99E+10 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration

"Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

- - Assumed area of plume:

Width = 60 ft Area 600 ft2 Saturated Depth = 10ft 56 m2 U 1.80E+06 1.60E+06 1.40E+06 C

1.20E+06 o 1.OOE+06 . . ..

x 8.00E+05

',.6.OOE+05 4.OOE+05 2.OOE+05.............. .. ..-........ ...

0.OOE+00 . . . . . .

V VV OV V7 07 ý- UPISt Date C

EXENW-18513-400 17/21 Plane 7 E2 E8 E9 Calculate mass discharged along a plane through E-2. E-8, and E-9:

Mass Total Mass Discharged Discharged Tritium Concentration (pCVL Mass Flux per Area*** through Plane Sample Date E-2 E-B E-9 Average (pClI/m2 /d)** (pCi/mr2) (pC)

11/1/2003 1,071 NM NM 1,071 1.52E+05 0 0.OOE+00 7/31/2004 1,071 NM NM 1,071 1.52E+05 4.14E+07 2.39E+09 12/2/2004 NM 0 1,000 500 3.64E+04 1.17E+07 6.72E+08 1/4/2005 0 2,000 2,000 1,333 2.05E+05 3.98E+06 2.29E+08 2/2/2005 NM 0 1,000 500 3.64E+04 3.50E+06 2.01 E+08 3/11/2005 NM 1,000 2,000 1,500 2.39E+05 5.09E+06 2.93E+08 418/2005 541 3,140 1,870 1,850 3.09E+05 7.67E+06 4.42E+08 4126/2005 NM 2,000 NM 2,000 3.40E+05 5.84E+06 3.36E+08 5/3/2005 NM 2,000 3,000 2,500 4.41E+05 2.73E+06 1.57E+0B

5/19/2005 NM 2,000 3,000 2,500 4.41E+05 2.73E+06 1.57E+08 Total Mass Discharged to Groundwater a 4.88E+09 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration Assume constant discharge between most recent sampled concentration to present

Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

- - Assumed area of plume:

Width = 62 ft Area 620 ft 2 Saturated Depth 10 ft 58 m2 5.OOE+05 4.50E+05 4.O0E+05

,R 3.50E+05 E 3,00E+05 .

a

,a2.50E+05 .. .

x 3 2.OOE+05 .-..-- --..-.--

L-1.50E+05 S1 .00E+05 .......... . ..

5.OOE+04.............. .

0.O0E+00 .- ~-- .. .. ........................ ,---.----..

,? V, , 0ov 0vovT Date D

EXENW-18513-400 18/21 Plane 8 E-3 E-10 Calculate mass discharged along a plane through E-3 and E-10:

Mass Total Mass Discharged Discharged Tritium Concentration (pCl0L) Mass Flux** per Area*** through Plane Sam ie Date E-3 E-10 Average (pCilm2 ld) (pCI/ 2

) (pCI) 11/1/2003 1,142 NM 1,142 1.66E+05 0 0.OOE+00 7131/2004 1,142 NM 1,142 1.66E+05 4.54E+07 2,44E+09 10/25/2004 1,000 NM 1,000 1.37E+05 1.31E+07 7.04E+08 11/22/2004 1,001 NM 1,001 1.38E+05 3.85E+06 2.08E+08 121212004 NM 2,000 2,000 3.40E+05 2.39E+06 1.29E+08 1/4/2005 NM 2,000 2,000 3.40E+05 1.12E+07 6.04E+08 2/1/2005 1,000 1,000 1,000 1.37E+05 6.68E+06 3.60E+08 3/7/2005 1,000 NM 1,000 1.37E+05 4.67E+06 2.52E+08 3/11/2005 NM 2,000 2,000 3.40E+05 9.54E+05 5.14E+07 4/8/2005 686 858 772- 9.14E+04 6.03E+06 3.25E+08 5/3/2005 1,000 1,000 1,000 1.37E+05 2.86E+06 1,54E+08 5/19/2005 1,000 1,000 1,000 1.37E+05 2.20E+06 1.19E+08 Total Mass Discharged to Groundwater 5.35E+09 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration Assume constant discharge between most recent sampled concentration to present

- Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

- - Assumed area of plume:

Width = 58 ft Area= 580 ft, Saturated Depth = 10 ft 54 m2 4.00E+05 3.50E+05 w 3.OOE+05 E 2.50E+05

.5 2.00E+05 i1.0E05......i............ .ii -..

L 1.50E+05 .........

5.00E+04 0.00E+00- -, , , , , ,, , , u, ,,, , ,

Date

EXENW-18513-400 19121 Plane 9 E-6 E-7 Calculate mass discharged along a plane through E-6 and E-7:

Mass Total Mass Discharged Discharged Tritium Concentration (pCiIL) Mass Flux*" per Area*** through Plane Sample Date E-6 E-7 Average (pClJm 2/d) (pCi/m 2 ) (pCi)

11/1/2003 465 7,513 3,989 7.42E+05 0 0.00E400 7/3112004 465 7,513 3,989 7.42E+05 2.02E+08 8.65E+09 10/25/2004 2,000 0 1,000 1.37E+05 3.78E+07 1.62E+09 12/212004 0 0 0 0.OOE+00 2.61E+06 1,12E+08 12/6/2004 0 0 0 Q.OOE+00 0.00E+00 0.OOE+00

5/19/2005 0 0 0 0.OOE+0O 0.OOE-00 0.OOE+00 Total Mass Discharged to Groundwater 1.04E+10 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration Assume constant discharge between most recent sampled concentration to present "Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

Assumed area of plume:

Width = 46 ft Area 460ft2 Saturated Depth 10 ft 43 m2 8.OOE+05 7.OOE+05 i~6.OOE+05 E~ 5.OOE+05

-9 4.OOE+05 -

uL 3.OOEtO5 U)

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EXENW-18513-400 20/21 Plane 10 DSP-124 Calculate mass discharged along a plane through DSP-124:

Tritium Mass Total Mass Concentration Mass Discharged Discharged (pCi/L) Flux" per Area*- through Plane Sample Date DSP-124 (pClIm 2ld) ApCilm) (pCI) 11/11/2003 91,166 1.13E+07 0 0.OOE+00 7131/2004 91,166 1.13E+07 3.08E+09 1.95E+11 9/3/2004 55,000 6.79E+06 3.07E+08 1.94E+10 11/23/2004 12,889 1.56E+06 3.38E+08 2.14E+10 2/25/2005 5,990 7.04E+05 1.06E+08 6.73E+09 3/29/2005 7,354 8.74E+05 2.52E+07 1,59E+09 4/8/2005 4,060 4.64E+05 6.69E+06 4.23E+08 5/19/2005 4,060 4.64E+05 1.90E+07 1.20E+09 Total Mass Discharged to Groundwater 2.45E+11 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration Assume constant discharge between most recent sampled concentration to present

- Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

-**Assumed area of plume:

Width = 20 ft Area 680 ft2 Saturated Depth = 34 ft 63 m' 1.20E+07 1.OOE+07

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EXENW-18513-400 21/21 Theoretical West Source Plane Calculate mass discharged along a plane through western source (theoretical):

Tritium Mass Total Mass Concentration Mass Discharged Discharged (pCi/L) Flux** per Area** through Plane Sample Date DSP-124 pCi/m2ld) (pCilm2 ) (pCI)

11/112003 200,000 2.48E+07 0 0.OOE-00 7/31/2004 200,000 2.48E+07 6.77E+09 1.26E+11 9/3/2004 200,000 2.48E+07 8.43E+08 1.57E+10 11/23/2004 75,665 9.36E+06 1.38E+09 2.57E+10 2/25/2005 24,491 3.OOE+06 5.81E+08 1.08E+10 3/29/2005 16,662 2.03E+06 8.05E+07 1.50E-g09 4/8/2005 14,795 1.91E+07 31..E+06 3.56E+08

5/1912005 9,046 1.08E+06 5.91E+07 1.10E+09 Total Mass Discharged to Groundwater 1.8iE+i1 Note:

Assume constant discharge beginning at time of leak equal to first available sampled concentration Assume constant discharge between most recent sampled concentration to present

- Assume background tritium concentration = 320 pCi/L (subtract from average monitored value)

"Assumed area of plume:

Width = 20 ft Area = 200 ft22 Saturated Depth = 10 ft 19 m 3.OOE+07

) 2.50E+07 "E2.OOE+07 U-EL 1.50E+07 X

5,OOE+06 O.OOE+00

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EXENW-1 8513-400 5 of 17 BDM Calculate Average Daily Runoff for Each Storm Sewer Area of East Sewer (DSP-1 32) - 761,075 ft2 Area of West Sewer (DSP-131) 447,068 ft2 Runoff as Percent of Precipitation 85%

Calculate Average Infiltration Rate of Groundwater Into Sewer (Base Flow)

Sewer Diameter = 18 in Cracked Percent of Sewer Wall = 10%

Hydraulic Conductivity, K = 3.29E-02 ftmin Effective Porosity (sandstone) = 0.15 Hydraulic Gradient, i East 0.0140 ft/ft West 0.0086 ft/ft Seepage Velocity East 3.07E-03 ftlmin West 1.89E-03 ft/min Length of Main Sewer East 1770 ft West 1020 ft Base Infiltration Flow East 52219 L/d West 18485 L/d Average Daily Runoff + Base Tritium Tritium Mass Flow Volume (liters) Concentration (pCi/L) Discharged (pCI)

Precipitation West Sewer East Sewer Date (in) IDSP.131) (DSP-132) DSP-131 DSP-132 DSP-131 DSP-132 111112003 1.06 969,007 1,670,358 1,579 79,351 1.53E-09 1.33E+11 11/212003 0.26 251,632 49,121 1,579 79,351 3.97E+08 3.56E+10 1113/2003 0.12 126,091 235,404 1,579 79,351 1.99E+08 1.87E+10 11/4/2003 0.88 807,597 1,395,579 1,579 79,351 1.28E+09 1.11E+11 11/5/2003 0 18,485 52j219 1,579 79,351 2.92E+07 4.14E+09 11/6/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/7/2003 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/8/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 111912003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/1012003 0.04 54,354 113,280 1,579 79,351 8.58E+07 8.99E+09 11/11/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/12/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/13/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/14/2003 0.05 63,321 128,546 1,579 79,351 1.OOE+08 1.02E+10 11/15/2003 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/16/2003 0.08 90,223 174,342 1,579 79,351 1.42E+08 1.38E+10 11/17/2003 1.22 1,112,482 1,914,605 1,579 79,351 1,76E+09 1.52E+11

) 11/18/2003 11/1912003 11/20/2003 0.53 0

0 493,746 18,485 18,485 861,288 52,219 52,219 1,579 1,579 1,579 79,351 79,351 79,351 7.80E+08 2.92E+07 2.92E+07 6.83E+10 4.14E+09 4.14E+09 11/2112003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/22/2003 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/23/2003 0.8 735,860 1,273,456 1,579 79,351 1.16E+09 1.01E+ 11 11/2412003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/25/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/26/2003 0.06 72,288 143,811 1,579 79,351 1.14E+08 1.14E+10 11/27/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/28/2003 0.08 90,223 174,342 1,579 79,351 1.42E+08 1.38E+10 11/29/2003 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11/30/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/1/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1212/2003 0 18,485 52,219 1,579 .... 79,351 2,92E+07 4,14E+09

EXENW-18513-400 6 of 17 BOM

) Average Daily Runoff + Base Flow Volume (liters)

Tritium Concentration (pCIIL)

Tritium Mass Discharged (pCQ)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132 DSP-131 DSP-132 DSP-131 DSP-132 12/3/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/4/2003 0.25 242,665 433,855 1,579 79,351 3.83E+08 3.44E+10 12/5/2003 0.26 251,632 449,121 1,579 79,351 3.97E+08 3.56E+10 121612003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/7/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/8/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/9/2003 0.3 287,501 510,182 1,579 79,351 4.54E+08 4,05E+10 12/10/2003 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 12h112003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/12/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E÷09 12/13/2003 0.25 242,665 433,855 1,579 79,351 3.83E+08 3.44E+10 12/14/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4,14E+09 12/15/2003 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 12/16/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/17/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/18/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/19/2003 0.03 45,387 98,015 1,579 79,351 7.17E+07 7.78E+09 12/2012003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1212112003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/22/2003 0.05 63,321 128,546 1,579 79,351 1.OOE+08 1.02E+10

)

12/23/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/24/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/25/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/26/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/27/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/28/2003 0.1 108,157 204,873 1,579 79,351 1.71E+08 1.63E+10 12/29/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/30/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 12/31/2003 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/112004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/2/2004 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 1/3/2004 0.09 99,190 189,608 1,579 79,351 1.57E+08 1.50E+10 1/412004 0.5 466,844 815,492 1,579 79,351 7.37E+08 6.47E+10 1/5/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/6/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/712004 0. 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/8/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 119/2005 0.02 36,419 82,749 1,579 79,351 5.75E+07 6.57E+09 1/10/2005 0.04 54,354 113,280 1,579 79,351 8.58E+07 8.99E+09

'1/_11/2004 0 .... 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/12/2004 0, 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 11312004 -0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/14/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/-15/2004 0 18,485 52,219. 1,579 79,351 2.92E+07 4.14E+09 1/16/2004 0.15 152,993 281,200 1,579 79,351 2.42E+08 2.23E+10 1/17/2004 0.1 108,157 204,873 1,579 79,351 1.71E+08 1.63E+10 1/18/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 j

EXENW-18513-400 7 of 17 BDM Average Daily Runoff + Base Tritiumn Tritium Mass Flow Volume (liters) Concentration (pCi/L) Discharged (pC)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP..132) DSP-131 DSP-132 DSP-131 DSP-132 1/19/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/2012004 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E÷09 112112004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/22/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09.

112312004 0.12 126,091 235,404 1,579 79,351 1.99E+08 1.87E+10 112412005 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/25/2004 0.09 99,190 189,608 1,579 79,351 1.57E+08 1.50E+10 112612004 0,12 126,091 235,404 1,579 79,351 1.99E+08 1.87E+10 1/27/2005 0.04 54,354 113,280 1,579 79,351 8.58E+07 8.99E+09 1/2812004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/2912004 0.5 466,844 815,492 1,579 79,351 7.37E+08 6.47E+10 1/30/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 1/31/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/1/2004 0 18,485 52,219 1,579 79,351 2,92E+07 4.14E+09 2/2/2004 0.08 90,223 174,342 1,579 79,351 1.42E+08 1.38E+10 2/3/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 214/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/5/2004 0.16 161,960 296,466 1,579 79,351 2.56E+08 2.35E+10 2/6/2004 0.03 45,387 98,015 1,579 79,351 7.17E+07 7.78E+09 2/7/2004 0.06 72,288 143,811 1,579 79,351 1.14E+08 1.14E+10 218/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/9/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/10/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/11/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/12/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/13/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/14/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/15/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/16/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/17/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2118/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/19/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/20/2004 0.18 179,894 326,997 1,579 79,351 2.84E+08 2.59E+10 2/21/2004 0.04 54,354 113,280 1,579 79,351 8.58E+07 8.99E+09 2/22/2004 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 2/23/2004 0 18,485 52,219 1,579 79,351 2,92E+07 4.14E+09 2/24/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/25/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/26/2004 0 18,485 52,219 1,579 79,351 2,92E+07 4.14E+09 2/27/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/28/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 2/29/2004 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 3/1/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3/2/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3/3/2004 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 3/4/2004 0.69 637,221 1,105,536 1,579 79,351 1.01E+09 8.77E+10 J 3/5/2004 0.41 386,140 678,103 1,579 79,351 6.10E+08 5.38E+10

EXENW-18513-400 8 of 17 BDM Average Daily Runoff + Base Tritium Tritium Mass Flow Volume (liters) Concentration (pCIlL) Discharged (pCi)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 DSP-132 DSP-131 DSP-132 3/6/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3/7/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 31812004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3/9/2004 0 18,485 52,219 11579 79,351 2.92E+07 4.14E+09 3/10/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3/11/2004 0.02 36,419 82,749 1,579 79,351 '5.75E+07 6.57E+09 3/12/2004 0 18,485 52,219 1,579 79,351 2.92E+07, 4.14E+09 3/13/2004 0.03 45,387 98,015 1,579 79,351 7.17E+07 7.78E+09 3/14/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3/1512004 0.11 117,124 220,139 1,579 79,351 1.85E+08 1.75E+10 3/16/2004 0.06 72,288 143,811 1,579 79,351 1.14E+08 1.14E+10 3117/2004 0.02 36,419 82,749 1,579 79,351 5.75E+07 6.57E+09 3/18/2004 0.16 161,960 296,466 1,579 79,351 2.56E+08 2.35E+10 3/19/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3120/2004 0.03 45,387 98,015 1,579 79,351 7.17E÷07 7.78E+09 3121/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 3/22/2004 0 18,485 52,219 1,579 79,351 2.92E+.07 4.14E+09 3/23/2004 0.18 179,894 326,997 1,579 79,351 2.84E+08 2.59E+10 3/2412004 0.26 251,632 449,121 1,579 79,351 3.97E+08 3.56E+10 3/25/2004 0.1 108,157 204,873 1,579 79,351 1.71E+08. 1.63E+10 3/26/2004 0.27 260,599 464,386 1,579 79,351 4.11E+08 3.68E+10 3/27/2004 0.06 72,288 143,811 1,579 79,351 1.14E+08 1.14E+10 3/28/2004 0.99 906,236 1,563,499 1,579 79,351 1.43E+09 1.24E+11 3/29/2004 0 18,485 52,219 1,579 79,351 2.92E407 4.14E+09 3/30/2004 0.45 422,008 739,164 1,579 79,351 6.66E+08 5.87E+10 3/31/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/1/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/2/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/3/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/4/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/5/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4,14E+09 4/6/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/7/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/8/2004 0 18,485 52,219 1,579 79,351 2.922+07 4.14E+09 4/9/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/10/2004 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/11/2004 0. 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/12/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/13/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/14/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/15/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/16/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/17/2004 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/18/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/19/2004 0 1B,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/20/2004 0.66 610,319 1,059,739 1,579 79,351 9,64E+08 8.41E+10

'J 4/21/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14.+09

EXENW-18513400 9 of 17 BDM J Average Daily Runoff + Base Flow Volume (liters)

Tritium' Concentration (pCi/L)

Tritium Mass Discharged (pCi)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 DSP-132 DSP-131 DSP-132 4/22/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/23/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/24/2004 0.72 664,122 1,151,332 1,579 79,351 1.05E+09 9,14E+10 4/2512004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 412612004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/27/2004 .0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4,28/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 4/29/2004 0.41 386,140 678,103 1,579 79,351 6.10E+08 5.38E+10 413012005 0.63 583,418 1,013,943 1,579 79,351 9.21E+08 8.05E+10 5/1/2004 0-36 341,304 601,775 1,579 79,351 5.39E+08 4.78E+10 5/2/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 513/2004 0 18,485 52,219 1,579 79.351 2.92E+07 4.14E+09 5/4/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/5/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/6/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/7/2004 0.67 619,287 1,075,005 1,579 79,351 9,78E÷08 8.53E+10 518/2004 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 5/9/2004 0.14 144,026 265,935 1,579 79,351 2.27E+08 2.11E+10 5/10/2004 0.03 45,387 98,015 1,579 79,351 7.17E+07 7,78E+09 5/1112004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09

) 5112/2004 5/13/2004 5/14/2004 0.12 0.57 0.64 126,091 529,615 592,385 235,404 922,350 1,029,208 1,579 1,579 1,579 79,351 79,351 79,351 1.99E+08 8.36E+08 9.35E+08 1.37E+10 7.32E÷10 8.17E-+10 5/15/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4,14E+09 5/16/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/17/2004 0.38 359,238 632,306 1,579 79,351 5.67E+08 5.02E+10 5/18/2004 0.14 144,026 265,935 1,579 79,351 2.27E+08 2.11E+10 5119/2004 0 15B,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/20/2004 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 5/21/2004 0.03 45,387 98,015 1,579 79,351 7.17E+07 7.78E+09 5/22200'4 0.45 422,008 739,164 1,579 79,351 _6.66E+08 5.87E+10 5/23(2004 0.05 63,321 128,546 1,579 79,351 1.00E+08 1,02E+10 5/24/2004 0.43 404,074 708,633 1,579 79,351 6.38E+08 5.62E+10 5/25/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/26/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/27/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/28/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/29/2004 trace 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 5/30/2004 0.1 108,157 204,873 1,579 79,351 1.71E+08 1.63E+10 5/31/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/1/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 61212004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/3/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/4/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/5/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 616/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09

) 617(2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09

EXENW-18513-400 10 of 17 BDM

\u) I Average Daily Runoff + Base Tritium Tritium Mass Flow Volume (liters) Concentration (pCUL) Discharged (pCi)

Precipitation West Sewer East Sewer Date (in) (DSp-131, (DSP-132) DSP-131 DSP-132 DSP-131 DSP-132 6/8/2004 0 18,485 52,219 1,579 79,351 2.925+07 4.14E+09 6/9/2004 0.1 108,157 204,873 1,579 79,351 1.71E+08 1.63E+10 6/10/2004 0.76 699,991 1,212,394 1,579 79,351 1.11E+09 9.62E+10 6/11/2004 0.87 798,630 1,380,314 1,579 79,351 1.26E+09 1.10E+11 6/12/2004 0.83 762,761 1,319,252 1,579 79,351 1.20E+09 1.05E+11 6/13/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6114/2004 0.66 610,319 1,059,739 1,579 79,351 9.64E+08 8.41E÷I10 611512004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/16/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/17/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/18/2004 0.09 99,190 189,608 1,579 79,351 1.57E+08 1.50E+10 611912004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/20/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/21/2004 0.4 3_77,173 662,837 1,579 79,351 5.96E+08 5.26E+10 6/22/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6123/2004 trace 18,485 52,219 1,579 79,351 2.92E+07 4.,14E+09 6/24/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/2512004 0.01 27,452 67,484 1,579 79,351 4.33E+07 5.35E+09 6126/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6127/2004 0 18,485 52,219 1,579 79,351 2.92E4'07 4.14E+09 6/28/2004 0.1 108,157 204,873 1,579 79,351 1.71E+08 1.63E+10 6/29/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 6/30/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7112004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/2/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/3/2004 0.2 197,829 357,528 1,579 79,351 3.12E+08 2.84E+10 7/4/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/5/2004 0.03 45,387 98,015 1,579 79,351 7.17E+07 7.78E+09 7/6/2004 0.13 135,059 250,670 1,579 79,351 2.13E+08 1.99E+10 7/7/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/8/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/9/2004 0.76 699,991 1,212,394 1,579 79,351 1.11E+09 9.62E+10 7110/2004 0.04 54,354 113,280 1,579 79,351 8.58E+07 8.99E+09 S7/111/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/12/2004 0 18,485 52,219 1,579 79,351 2.922+07 4.14E+09 7/13/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E÷09 7/14/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/15/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/16/2004 0.23 224,730 403,324 1,579 79,351 3.55E+08 3.20E+10 7/17/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.142E+09 7/18/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/19/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/20/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 712812004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/22/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/23/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/2412004 0.08 9023. . 7,4 1,5'79 '.79,351 "1.2E+08

1. 1.38E+'10 0 7/24/2004 0.8 90,2. 17,421 1,579 79,351 2442E+07 414E109

EXENW-18513-400 11 of 17 BDM Average Daily Runoff + Base Tritium Tritium Mass Flow Volue (liters) Concentration (pCI/L) +Discharged (pCl)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 DSP-132 DSP-131 DSP-132 7125/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/26/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/27/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/28/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 7/29/2004 0.2 197,829 357,528 1,579 79,351 3.12E+08 2.84E+10 7/30/2004 0.56 520,647 907,085 1,579 79,351 .8.22E+08 7.20E+10 7/31/2004 0 18,485 52,219 1,579 79,351 2.92E+07 4.14E+09 8/1/2004 0 18,485 52,219 1,562 78,621 2.89E+07 4.11E+09 812/2004 0 18,485 52,219 1,545 77,892 2.86E+07 4.07E+09 8/3/2004 1.27 1,157,318 1,990,933 1,528 77,162 1.77E+09 1.54E+11 814/2004 0.2 197,829 357,528 1,511 76,432 2.99E+08 2.73E÷10 8/5/2004 0 18,485 52,219 1,494 75,702 2.76E+07 3.95E+09 8/612004 0 18,485 52,219 1,477 74,973 2.73E+07 3.91E+09 8/7/2004 0.01 27,452 67,484 1,460 74,243 4.01E+07 5.01E+09 8/8/2004 0 18,485 52,219 1,443 73,513 2.67E+07 3,84E+09 8/9/2004 0 18,485 52,219 1,426 72,784 2.64E+07 3.80E+09 8/10/2004 0 18,485 52,219 1,409 72,054 2.60E+07 3.76E+09 8/11/2004 0 18,485 52,219 1,392 71,324 2.57E+07 3.72E+09 8/12/2004 0 18,485 52,219 1,375 70,594 2.54E+07 3.69E+09 8/13/2004 0 18,485 52,219 1,358 69,865 2.51E+07 3.65E+09 8/14/2004 0 18,485 52,219 1,341 69,135 2.48E+07 3.61E+09 8/15/2004 0 18,485 52,219 1,324 68,405 2.45E+07 3.57E+09 8/16/2004 trace 18,485 52,219 1,307 67,676 2.42E+07 3.53E+09 8/17/2004 0.45 422,008 739,164 1,290 66,946 5.44E+08 4.95E+10 8118/2004 0.75 691,024 1,197,128 1,272 66,216 8.79E+0B 7.93E+10 8/19/2004 0.42 395,107 693,368 1,255 65,486 4.96E+08 4.54E+10 8/20/2004 0.61 565,483 983,412 1,238 64,757 7.OOE+08 6.37E+10 8/21/2004 0 18,485 52,219 1,221 64,027 2.26E+07 3.34E+09 8/22/2004 0 18,485 52,219 1,204 63,297 2.23E+07 3.31E+09 8/23/2004 0 18,485 52,219 1,187 62,567 2.19E+07 3.27E+09 8/24/2004 0 18,485 52,219 1,170 61,838 2.16E+07 3.23E+09 8/25/2004 1.9 1,722,250 2,952,657 1,153 61,108 1.99E+09 1.80E+11 8/26/2004 0.55 511,680 891,819 1,136 60,378 5.81E+08 5.38E+10 8/27/2004 0.55 511,680 891,819 1,119 59,649 5.73E+08 5.32E+10 8/28/2004 1.12 1,022,810 1,761,951 1,102 58,919 1.13E+09 1.04E+11 8/29/2004 0 18,485 52,219 1,085 58,189 2.01E+07 3.04E+09 8/30/2004 0 18,485 52,219 1,068 57,459 1.97E+07 3.OOE+09 8/31/2004 0 18,485 52,219 1,051 56,730 1.94E'07 2.96E+09 9/112004 _ 0 18,485 52,219 1,034 56,000 1.91E+07, 2.92E+09 9/2/2004 0 18,485 52,219 1,017 63,000 1.88E+07 3.29E+09

?).

9/3/2004 0 18,485 52,219 1,000 99,000 1.85E+07 5.17E+09 9/4/2004 0.03 45,387 98,015 1,000 41,000 4.54E+07 4.02E+09 9/5/2004 0 18,485 52,219 1,000 87,000 1.85E+07 4.54E+09 9/6/2004 0.02 36,419 82,749 2,000 36,000 7.28E+07 2.98E+09 9/7/2004 0 18,485 52,219 1,000 11,000 1.85E+07 5.74E+08 9/8/2004 0 18,485 52,219 1,000 9,000 1.85E+07 4.70E+08 9/9/2004 _0 18,485 52,219 1,000 8,000 1.85E+07 4.18E+08

EXENW-18513-400 12 of 17 BDM Average Daily Runoff + Base Tritium Tritium Mass Flow Volume (liters) Concentration (pCI/L) Discharged (pC)

Precipitation West Sewer East Sewer Date (in) JDSP-131) (DSP-1 3 2) DSP-131 DSP-132 DSP-131 DSP-132 911012004 0 18,485 52,219 1,000 19,000 1.85E+07 9.92E+08 9/11/2004 0 18,485 52,219 1,000 11,000 1.85E+07 5.74E+08 9/1212004 0 18,485 52,219 1,000 8,000 1.85E+07 4.18E+08 9/13/2004 0 18,485 52,219 1,000 7,000 1.85E+07 3.66E+08 9/1412004 0 18,485 52,219 1,000 7,000 1.85E+07 3.66E+08 9/15/2004 0.74 682,057 1,181,863 1,000 5,000 6.82E+08 5.91E+09 9/16/2004 0.01 27,452 67,484 1,000 2,000 2.75E+07 1.35E+08 9/17/2004 0 18,485 52,219 1,000 5,000 1.85E+07 2.61E+08 9/18/2004 0 18,485 52,219 1,000 5,000 1.85E+07 2.61E+08 911912004 0 18,485 52,219 1,000 5,000 1.85E+07 2.61E+08 9/20/2004 0 18,485 52,219 2,000 5,000 3.70E+07 2.61E+08 9/21/2004 0 18,485 52,219 1,000 4,000 1.85E+07 2.09E+08 9/22/2004 0 18,485 52,219 1,000 5,000 1.85E+07 2.61E+08 9/23/2004 0 18,485 52,219 1,000 5,000 1.85E+07 2.61E+08 9/24/2004 0 18,485 52,219 1,000 5,000 1.85E+07 2.61E+08 9/25/2004 0 18,485 52,219 1,000 5,000 1.85E+07 2.61E+08 9/26/2004 0 18,485 52,219 1,000 4,000 1.85E+07 2.09E+08 9/27/2004 0 18,485 52,219 1,000 4,000 1.85E+07 2.09E+08 9/28/2004 0 18,485 52,219 1,000 4,000 1.85E+07 2.09E-+08 9/29/2004 0 18,485 52,219 1,000 4,000 1.85E+07 2.09E+08 9/30/2004 0 18,485 52,219 0 4,000 O.OOE+00 2.09E+08 10/1/2004 0.31 296,468 525,448 0 5,000 O.OOE+00 2.63E+09 10/2/2004 0 18,485 52,219 2,000 2,000 3.70E+07 1.04E+08 10/3/2004 0 18,485 52,219 0 3,000 O.OOE+00 1.57E+08 10/4/2004 0 18,485 52,219 1,000 3,000 1.85E+07 1.57E+08 10/5/2004 0 18,485 52,219 1,000 3,000 1.85E+07 1.57E+08 10/6/2004 0 18,485 52,219 0 1,000 O.OOE+00 5.22E+07 10/7/2004 0 18,485 52,219 0 3,000 O.OOE+00 1.57E+08 10/8/2004 0.39 368,205 647,572 1,000 2,000 3.68E+08 1.30E+09 10/9/2004 0.24 233,698 418,590 1,000 2,000 2.34E+08 8.37E+08 10/10/2004 0 18,485 52,219 1,000 3,000 1.85E+07 1.57E+08 10/11/2004 0 18,485 52,219 0 3,000 O.OOE+00 1.57E+08 10/12/2004 0.39 368,205 647,572 125 3,000 4.60E+07 1.94E+09 10/13/2004 0 18,485 52,219 250 4,000 4.62E+06 2.09E+08 10/14/2004 0.38 359,238 632,306 375 2,000 1.35E+08 1.26E+09 10/15/2004 0.04 54,354 113,280 500 1,000 2.72E+07 1.13E+08 10/16/2004 0 18,485 52,219 625 2,000 1.16E+07 1.04E+08 10/17/2004 0 18,485 52,219 750 3,000 1.39E+07 1.57E+08 10/18/2004 0.02 36,419 82,749 875 2,000 3.19E+07 1.65E+08 10119/2004 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 10120/2004 0 18,485 52,219 1,000 3,000 1,85E+07 1.57E+08 10/2112004 0 18,485 52,219 1,000 3,000 1.85E+07 1.57E+08 10/22/2004 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 10/23/2004 0.43 404,074 708,633 1,000 0 4.04E+08 O.OOE+O0 1012412004 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 10125/2004 0 18,485 52,219 1,000 3,000 1.85E+07 1.57E+08

,j 10126/2004 0.1 108,157 204,873 1,000 4,000 1.08E+08 8.19E+08

EXENW- 18513-400 13 of 17 BDM Average Daily Runoff + Base Tritium Tritium Mass Flow Volume (liters) Concentration (pCI/L) Dischargeld pC)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 DSP-132 DSP-131 DSP-132 10127/2004 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 10/28/2004 0.03 45,387 98,015 1,000 3,000 4.54E+07 2.94E+08 10/29/2004 0.05 63,321 128,546 1,000 2,000 6.33E+07 2.57E+08 10/30/2004 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 10/31/2004 0.04 54,354 113,280 1,000 2,000 5.44E+07 2.27E+08 11/1/2004 1.24 1,130,416 1,945,136 1,000 0 1.13E+09 0.OOE+00 11/2/2004 0 18,485 52,219 857 1,000 1.58E+07 5.22E+07 11/3/2004 0.36 341,304 601,775 714 1,000 2.44E+08 6.02E+08 11/4/2004 0.36 341,304 601,775 571 1,000 1.95E+08 6.02E+08 11/5/2004 0 18,485 52,219 429 5,000 7.92E+06 2,61E+08 11/6/2004 0 18,485 52,219 286 0 5.28E+06 0.OOE+00 11/7/2004 0 18,485 52,219 143 2,000 2.64E+06 1.04E+08 1118/2004 0 18,485 52,219 0 1,000 -1.89E-08 5.22E+07 11/9/2004 0 18,485 52,219 143 2,000 2.64E+06 1.04E+08 11/10/2004 0 18,485 52,219 286 2,000 5.28E+06 1.04E+08 11/11/2004 0 18,485 52,219 429 4,000 7.92E+06 2.09E+08 11/12/2004 0 18,485 52,219 571 5,000 1.06E+07 2.61E+08 11/13/2004 0 18,485 52,219 714 5,333 1.32E+07 2.78E+08 11/14/2004 0 18,485 52,219 857 5,667 1.58E+07 2.96E+08 11/15/2004 0 18,485 52,219 1,000 6,000 1.85E+07 3.13E+08 11/16/2004 0 18,485 52,219 857 3,000 1.58E+07 1.57E+08 11/17/2004 0 18,485 52,219 714 3,000 1.32E+07 1.57E+08 11/18/2004 0.6 556,516 968,146 571 5,000 3.18E+08 4.84E+09 11/19/2004 0.21 206,796 372,793 429 1,000 8.86E+07 3,73E+08 11/20/2004 0 18,485 52,219 286 2,000 5.28E+06 1.04E+08 11/21/2004 0 18,485 52,219 143 5,000 2.64E+06 2.61E+08 11/22/2004 0 18,485 52,219 0 5,000 -1.89E-08 2.61E+08 11/23/2004 0 18,485 52,219 143 5,000 2.64E+06 2.61E+08 11/24/2004 0.14 144,026 265,935 286 0 4.12E+07 0.OOE+00 11/25/2004 0 18,485 52,219 429 1,000 7.92E+06 5.22E+07 11/26/2004 0.14 144,026 265,935 571 0 8.23E+07 0.00E+00 11/27/2004 0.46 430,976 754,430 714 0 3.08E+08 0.OOE+00 11/28/2004 0.06 72,288 143,811 857 4,000 6.20E+07 5.75E+08 11/29/2004 0.16 161,960 296,466 1,000 4,000 1,62E+08 1.19E+09 11/30/2004 0.53 493,746 861,288 857 0 4.23E+08 0.OOE+00 1211/20*.4 0 18,485 52,219 714 0 1.32E+07 0.OOE+00 12/2/2004 0 18,485 52,219 571 5,000 1.06E+07 2.61E+08 12/3/2004 0 18,485 52,219 429 5,000 7.92E+06 2.61E+08 12/4/2004 0 18,485 52,219 286 7,000 5.28E+06 3.66E+08 12/5/2004 0.38 359,238 632,306 143 132,000 5.13E+07 8.35E+10 12/6/2004 0.46 430,976 754,430 0 2,000 -4.41E-07 i.51E+09 12/7/2004 0.76 699,991 1,212,394 0 0 0.OOE+00 0.00E+00 12/8/2004 0 18,485 52,219 0 2,000 O.OOE+00 1.04E+08 12/9/2004 0 18,485 52,219 0 6,000 0.OOE+00 3.13E+08 12/1012004 trace 18,485 52,219 0 9,000 O.OOE+00 4.70E+08 12/11/2004 0 18,485 52,219 0 2,000 0,OOE+00 1.04E+08 12/12/2004 0 18,485 52,219 0 0 0,OOE+00 0.0OE+00

EXENW-18513-400 14 of 17 BDM Average Daily Runoff + Base Tritium Tritium Mass Flow Volume (liters) Concentration (pCI/L) Discharged (pCi)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 DSP-132 DSP.131 DSP-132 12/13/2004 0 18,485 52,219 0 0 0.OOE+00 0.OOE+00 12114/2004 0 18,485 52,219 0 3,000 0.O0E+00 1.57E+08 12115/2004 0 18,485 52,219 0 3,000 0.OOE+00 1.57E+08 1211612004 0 18,485 52,219 0 1,000 0.OOE+00 5.22E÷07 12/17/2004 0 18,485 52,219 0 3,000 O.OOE+00 1.57E+08 12/18/2004 0 18,485 52,219 0 1,000 0.OOE+O0 5.22E+07 12/19/2004 0 18,485 52,219 0 5,000 0.OOE+00 2.61E+08 12/20/2004 0 18,485 52,219 0 2,000 0,00E+00 1.04E+08 12/21/2004 0 18,485 52,219 67 1,933 1.23E+06 1.01E+08 12/22/2004 0 18,485 52,219 133 1,867 2.46E+06 9.75E+07 12/2312004 0 18,485 52,219 200 1,800 3.70E+06 9.40E+07 12/2412004 0 18,485 52,219 267 1,733 4.93E+06 9.05E+07 12/25/2004 0 18,485 52,219 333 1,667 6,16E+06 8.70E+07 12/26/2004 0 18,485 52,219 400 1,600 7.39E+06 8.35E+07 1212712004 0 18,485 52,219 467 1,533 8.63E+06 8.01E+07 12/28/2004 0 18,485 52,219 533 1,467 9.86E+06 7.66E+07 12/29/2004 0 18,485 52,219 600 1,400 1.11E+07 7.31E+07 12/30/2004 0 18,485 52,219 667 1,333 1.23E+07 6.96E+07 12/31/2004 0 18,485 52,219 733 1,267 1.36E+07 6.61E+07 1/1/2005 0.84 771,729 1,334,518 800 1,200 6.17E+08 1.60E+09 1/2/2005 0.22 215,763 388,059 867 1,133 1.87E+08 4.40E+08 j1 1/3/2005 1/4/2005 0.54 0.19 502,713 188,862 876,554 342,262 933 1,000 1,067 1,000 4.69E+08 9.35E+08 1.89E+08 3.42E+08 115/2005 0.4 377,173 662,837 1,000 1,036 3.77E+08 6.87E+08 116/2005 0 18,485 52,219 1,000 1,071 1.85E+07 5.59E+07 1/7/2005 0 18,485 52,219 1,000 1,107 1.85E+07 5.78E+07 102005 0 18,485 52,219 1,000 1,143 1.85E+07 5.97E+07 1/9/2005 0.19 188,862 342,262 1,000 1,179 1.89E+08 4.03E+08 1/1012005 0.28 269,566 479,652 1,000 1,214 2.70E+08 5.82E+08 1/11/2005 0.19 188,862 342,262 1,000 1,250 1.89E+08 4.28E+08 1/1212005 1.26 1,148,350 1,975,667 1,000.. 1,286 1.15E+09 2.54E+09 1/13/2005 0.12 126,091 235,404 1,000 1,321 1.26E+08 3.11E+08 1/14/2005 0 18,485 52,219 1,000 1,357 1.85E+07 7.09E+07 1/15/2005 trace 18,485 52,219 1,000 1,393 1.85E+07 7.27E+07 1/16/2005 0 18,485 52,219 1,000 1,429 1.85E+07 7.46E+07 1/17/2005 0 18,485 52,219 1,000 1,464 1.85E+07 7.65E+07 1/18/2005 0.1 108,157 204,873 1,000 1,500 1.08E+08 3.07E+08 1/19/2005 0.1 108,157 204,873 1,000 1,536 1.08E+08 3.15E+08 1/20/2005 0.03 45,387 98,015 1,000 1,571 4.54E+07 1.54E+08 1/21/2005 0.02 36,419 82,749 1,000 1,607 3.64E+07 1.33E+08 1/22/2005 0.07 81,255 159,077 1,000 1,643 8.13E+07 2.61E+08 1/23/2005 0.14 144,026 265,935 1,000 1,679 1.44E+08 4.46E+08 1/24/2005 0 18,485 52,219 1,000 1,714 1.85E+07 8.95E+07 1/25/2005 0 18,485 52,219 1,000 1,750 1.85E+07 9.14E+07 1/26/2005 0.01 27,452 67,484 1,000 1,786 2.75E+07 1.21E+08 112712005 0 18,485 52,219 1,000 1,821 1 1.85E+07 9.51E+07 1/28/2005 0 18,485 . 52,219 1,000 1,857 1.85E+07 9.70E+07

EXENW-18513-400 15 of 17 BDM Average Daily Runoff + Base Tritium Tritium Mass Flow Volume fliters) Concentration (pCi/L) Discharged (pCi)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 DSP-132 DSP-1 31 DSP-132 1129/2005 trace 18,485 52,219 1,000 1,893 1.85E+07 9.88E+07 1/30/2005 0 18,485 52,219 1,000 1,929 1.85E+07 1.01E+08 1/31/2005 0 18,485 52,219 1,000 1,964 1.85E+07 1.03E+08 2/1/2005 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 2/2/2005 0 18,485 52,219 1,000 1,971 1.85E+07 i.03E+08 2/3/2005 0 18,485 52,219 1,000 .1,943 1.85E+07 1.01E+08 2/4/2005 0 18,485 52,219 1,000 1,914 1.85E+07 1.OOE+08 215/2005 0 18,485 52,219 1,000 1,886 1.85E+07 9.85E+07 2/6/2005 019 188,862 342,262 1,000 1,857 1.89E+08 6.36E+08 2/7/2005 0.16 161,960 296,466 1,000 1,829 1.62E+08 5.42E+08 2/8/2005 0.01 27,452 67,484 1,000 1,800 2.75E+07 1.21E+08 2/9/2005 0.04 54,354 113,280 1,000 1,771 5.44E+07 2.01E+08 2/10/2005 0 18,485 52,219 1,000 1,743 1.85E+07 9.IOE+07 2/11/2005 0 18,485 52,219 1,000 1,714 1,85E+07 8.95E+07 2/12/2005 0 18,485 52,219 1,000 1,686 1.85E+07 8.80E+07 2/13/2005 0.18 179,894 326,997 1,000 1,657 1.80E+08 5.42E+08 2/14/2005 0.03 45,387 98,015 1,000 1,629 4,54E+07 1.60E+08 2/15/2005 0.04 54,354 113,280 1,000 1,600 5.44E+07 1.81E+08 2/16/2005 0 18,485 52,219 1,000 1,571 1.85E+07 8.21E+07 2/17/2005 0 18,485 52,219 1,000 1,543 1.85E+07 8.06E+07

) 2/18/2005 2/1912005 2/20/2005 2/2-1/2005 0

0.01 0.06 0.01 18,485 27,452 72,288 27,452 52,219 67,484 143,811 67,484 1,000 1,000 1,000 1,000 1,514 1,486 1,457 1,429 1.85E+07 7.91E++07 2.75E+07 1.OOE+08 7,23E+07 2.10E+08 2.75E+07 9.64E+07 2/22/2005 0 18,485 52,219 1,000 1,400 1.85E+07 7.31E+07 2/23/2005 0 18,485 52,219 1,000 1,371 1,85E+07 7.16E+07 2/24/2005 0 18,485 52,219 1,000 1,343 1.85E+07 7.01E+07 2/25/2005 0 18,485 52,219 1,000 1,314 1.85E+07 6.86E+07 2/26/2005 0 18,485 52,219 1,000 1,286 1.85E+07 6.71E+07 2/27/2005 0.03 45,387 98,015 1,000 1,257 4.54E+07 1.23E+08 2/28/2005 0.03 45,387 98,015 1,000 1,229 4.54E+07 1.20E+08 3/1V2005 0 18,485 52,219 1,000 1,200 1.85E+07 6.27E+07 3/2/2005 0 18,485 52,219 1,000 1,171 1.85E+07 6.12E+07 3/3/2005 0 18,485 52,219 1,000 1,143 1.85E+07 5.97E+07 3/4/2005 0.02 36,419 82,749 1,000 1,114 3.64E+07 9.22E+07 3/5/2005 0 18,485 52,219 1,000 1,086 1.85E+07 5.67E+07 3/6/2005 0 18,485 52,219 1,000 1,057 1.85E+07 5.52E+07 3/7/2005 0 18,485 52,219 1,000 1,029 1.85E+07 5.37E+07 3/8/2005 0 18,485 52,219 1,000 1,000 1.85E+07 5.22E+07 3/912005 0 18,485 52,219 1,013 1,017 1.87E+07 5.31E+07 3/10/2005 0.11' 117,124 220,139 1,026 1,034 1.20E+08 2.28E+08 3/11/2005 0 18,485 52,219 1,039 1,051 1.92E+07 5,49E+07 3/12/2005 0 18,485 52,219 1,052 1,068 1.94E+07 5.57E+07 3/13/2005 0 18,485 52,219 1,065 1,085 1.97E+07 5.66E+07 3/14/2005 0 18,485 52,219 1,078 1,101 1.99E+07 5.75E+07 3/15/2005 0 18,485 52,219 1,091 1,118 2.02E+07 5.84E+07 q1ý 3/16/2005 0 18,485 52,219 1,104 1,135 2.04E+07 5.93E+07

EXENW-18513-400 16 of 17 BDM Average Daily Runoff + Base Tritium Tritium Mass Flow Volue (liters) Concentration (pCI/L) Discharged (PCI)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 ,DSP-132 DSP-131 DSP-132 3/17/2005 0 18,485 52,219 1,117 1,152 2.06E+07 6.02E+07 3/18/2005 0 18,485 52,219 1,130 1,169 2.09E+07 6.1OE+07 3/19/2005 0.09 99,190 189,608 1,143 1,186 1.13E+08 2.25E+08 3/20/2005 0 18,485 52,219 1,156 1,203 2.14E+07 6.28E+07 3/21/2005 0 18,485 52,219 1,169 1,220 2.16E+07 6.37E+07 3/22/2005 0.46 430,976 754,430 1,182 1,237 5.09E+08 9.33E+08 3/23/2005 0 18,485 52,219 1,195 1,254 2.21E+07 6.55E+07 3/24/2005 0.32 305,435 540,713 1,207 1,270 3.69E+08 6.87E+08 3/25/2005 0 18,485 52,219 1,220 1,287 2.26E+07 6.72E+07 3/26/2005 0 18,485 52,219 1,233 1,304 2.28E+07 6.81E+07 3/27/2005 0 18,485 52,219 1,246 1,321 2.30E+07 6.90E+07 3/28/2005 0 18,485 52,219 1,259 1,338 2.33E+07 6.99E+07 3/29/2005 0 18,485 52,219 1,272 1,355 2.35E+07 7.08E+07 3/3012005 0.1 108,157 204,873 1,285 1,372 1;39E+08 2.81E+08 3/31/2005 0 18,485 52,219 1,298 1,389 2.40E+07 7.25E+07 411/2005 0.11 117,124 220,139 1,311 1,406 1.54E+O8 3.09E+08 4/2/2005 0 18,485 52,219 1,324 1,423 2.45E+07 7.43E+07 4/312005 0 18,485 52,219 1,337 1,439 2.47E+07 7.52E+07 4/412005 0 18,485 52,219 1,350 1,456 2.50E+07 7.61E+07 4/5/2005 0 18,485 52,219 1,363 1,473 2.52E+07 7,69E+07 4/6/2005 0.09 99,190 189,608 1,376 1,490 1.36E+08 2.83E+08

-J 4/7/2005 4/8/2005 0

0 18,485 18,485 52,219 52,219 1,389 1,402 1,507 1,524 2.57E+07 7.87E+07 2.59E+07 7.96E+07 4/9/2005 0 18,485 52,219 1,387 1,542 2.56E+07 8.05E+07 4/10/2005 0 18,485 52,219 1,371 1,561 2.53E+07 8.15E+07 4/11/2005 0.02 36,419 82,749 1,356 1,579 4.94E+07 1.31E+08 4/12/2005 0.87 798,630 1,380,314 1,340 1,597 1.07E+09 2.20E+09 4/13/2005 0.01 27,452 67,484 1,325 1,616 3.64E+07 1.09E+08 4/14/2005 0 18,485 52,219 1,309 1,634 2.42E+07 8.53E+07 4/15/2005 0 18,485 52,219 1,294 1,652 2.39E+07 8.63E+07 4/16/2005 0 18,485 52,219 1,278 1,670 2.36E+07 8.72E+07 4/17/2005 0.01- 27,452 67,484 1,263 1,689 3.47E+07 1.14E+08 4/18/2005 0 18,485 52,219 1,247 1,707 2.31E+07 8.91E+07 4/19/2005 0 18,485 52,219 1,232 1,725 2.28E+07 9.01E+07 4/20/2005 0.28 269,566 479,652 1,216 1,744 3.28E+08 8.36E+08 4/21/2005 0.25 242,665 433,855 1,201 1,762 2.91E+08 7.64E+08 4/22/2005 0.17 170,927 311,731 1,186 1,780 2.03E+08 5.55E+08 4123/2005 0.01 27,452 67,484 1,170 1,799 3.21E+07 1.21E+08 4/24/2005 0 18,485 52,219 1,155 1,817 2.13E+07 9.49E+07 4/25/2005 0 18,485 52,219 1,139 1,835 2,11E+07 9.58E+07 4/26/2005 0 18,485 52,219 1,124 1,854 2.08E+07 9.68E+07 4/27/2005 0 18,485 52,219 1,108 1,872 2.05E+07 9.77E+07 4/28/2005 0 18,485 52,219 1,093 1,890 2.02E+07 9.87E+07 4/29/2005 0 18,485 52,219 1,077 1,908 1.99E+07 9.97E+07 4/3012005 0 18,485 52,219 1,062 1,927 1.96E+07 1.01E+08 51112005 0 18,485 52,219 1,046 1,945 1.93E+07 1.02E+08 Q1ý 5/2/2005 0 18,485 52,219 1,031 1,963 1.91E+07 1.03E+08

EXENW-18513-400 17 of 17 BDM

) Average Daily Runoff + Base Flow Volume (liters)

Tritium Concentration (pClIL)

Tritium Mass Discharged (pC)

Precipitation West Sewer East Sewer Date (in) (DSP-131) (DSP-132) DSP-131 DSP-132 DSP-131 DSP-132 5/3/2005 0 18,485 52,219 1,015 1,982 1.88E+07 1.03E+08 5/4/2005 0 18,485 52,219 1,000 2,000 1.85E+07 1,04E+08 5/5/2005 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 5/6/2005 0 18,485 52,219 1,000 2,000 i.85E+07 1.04E+08 517/2005 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08

5/8/2005 0.01 27,452 67,484 1,000 2,000 2.75E+07 1.35E+08 5/9/2005 0.13 135,059 250,670 1,000 2,000 1.35E+08 5.01 E+08 5/1012005 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 5/11/2005 1 915,204 1,578,765 1,000 2,000 9.15E+08 3.16E+09 5112/2005 0.08 90,223 174,342 1,000 2,000 9.02E+07 3.49E*08 5/13/2005 0.08 90,223 174,3"42 1,000 2,000 9.02E+07 3.49E+08 5/14/2005 0.26 251,632 449,121 1,000 2,000 2,52E+08 B.98E+08 5/115/2005 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 5/16/2005 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 5/1712005 0 18,485 52,219 1,000 2,000 1.85E+07 1.04E+08 5/18/2005 0.89 816,565 1,410,845 1,000 2,000 8.17E+08 2.82E+09 5/19/20051 0.78 717,926 1,242,925 1,000 2,000 7.18E+08 2.49E+09 7.33E+10 5.27E+12 Total Mass Discharged Since Start of Leak 5.34E+12 Precipitation data from Dresden Island Weather Station, Morris, Illinois Trace precipitation observations treated as 0.00 inches

) Bold concentration values indicate actual sampled concentrations. Remaining concentrations are linearly interpolated between sample dates, except those prior to first sample date (constant concentration projected backward) and those since most recent sample date (constant concentration projected forward)

)

)BIOSCREEN INPUT AND OUTPUT SCREENS N)

EXENW-18513-400 ;

BIOSCREEN Modeling Site-Specific Inputs Input Parameter Value Reference Value from calculations from slug test data (2005) for Hydraulic Conductivity, K 1.67E-02 cm/s shallow well DSP.1 57S Hydraulic Gradient, ý 0,014 feet/feet Calculated horizontal gradient from groundwater

.elevation data collected 412005 within the shallow Hydraulic Gradient, i., 0.0086 fee~feet aquifer.

Porosity, 0e 15 % Typical Effective Porosity of Sandstone (USEPA, 1989)

Maximum plume length upgraient of former nit1 Plume Length, Lp, east 1330 feet Intake Canal Maximum plume length upgraatent o Unit3 Plume Length, LP. We 890 feet Discharge (Hot) Canal Zheng and Bennet (1995), Taken as an order of Transverse Dispersivity, a, a/i10 feet magnitude smaller than a, Zheng and Bennet (1995). Taken as two orders of Vertical Dispersivity, a, a,/100 feet magnitude smaller than a, Modeled Source Thickness, Z I1 feet Assumed depth of impacts at source Iotal, mass estimated at nearest monitoring points to source. Alarger component of source mass islikely discharged to storm sewer upgradient of nearest Source Masseast 4.18E+12 pCi monitoring points. ,

Total mass estmaTed ingroundwater at nearest monitoring point to source minus total mass discharged Source MassW,* .08E11 pCi through west storm sewer.

Tritium Half-Life 12,3 years Michigan DEQ 0

BIOSREE NatralAtteuaton Dcison Sppot Sytem

~fr~o~e Crferwyoimegte~x~ei~e EXENW-18513-400 Data lopufnsnCtoas V,~io 1.4Transwr Eat tof Leak F1715 1. ntrvglue dr l ~

Veot~

vepg V 'ENER.AL.c.

639f~ oeed AreaLegh 13301f) ls below f. . '

1'. HYOROG "EOLOG.Y.i ::::: or ::*i.:':.":! formulas, hd buli.

i:. i~deledrea Wdth'

. ::*:~ i*. inStoe

.i*iii!,:i* 286ft W Ve.. 'Viable*

0 aln Sour ~tdirc~~f

. . . . . .al c;lok atPuebCross-Sreyto d dnL 0on.'T Pemsity~~~ 05() on*er any

.SOURCE DATA

'I DISPERSION.1 Logtdiavsersv: ,_____

aqhaix, 2 .5(f Sovrce zones: anid Input Concentra~ons &Widths Transverse Dispersivity

.." So-u.rce Thickness. in 2.ha

~7.4)0 Vertical Plane Sourre: Look at Plume Cross-Se.(an Estmated ,FlumeLength' Lp Iý

'&. ADSORPT[ON.

Uric ~mFO:e e~

Rpt~r~~r~Faccr'~View Dfor Refti stie ofPue Looking Domn

.Soil Bulk Density rho [jjQ~ ~ ~ {1~o(g bseivd Centein Cncnfaons at~odnn art o

eFrai~ion~gani~arbo

o*,tio

,. fcco.o~J) I 7.FlIELVDATA. FOR COMPARIO N. loa K or Enter T

4. TO' .......:D it. mS.urce (st) Ixml*at "

Soct 5 CHOOSE TYPE 0FDOUTU TO SEE:

-A~-e oInanaeuRecinMd "RUN Delb. 4O ygn t He CENTERLINERU ARY., elR MObsreN Deta Nirte2N.3:

evsIo' F2 She 16.6 (74 Paste Example Daa e O*t 0View Output . View Output

'Obseve1i th~e CU Ljpig RestoreFormulas aa for Vs, DisprWvies, R,lambda, other 0-

"4'

qw DiSOENi MENTER : N

1 4P6E+~ 35E 4,O6 3.17F~O .. H 2.~H 28E+5 25Eo 232~5 1E+ 4E FiDat eld 1.4Em0 4.4Et0 3.8-531E0 ,7+5 29E0

,4 4E0 ,3+5 14E0 uaecy

- v-is u!Instantneous Reacion iNo : il~tfmSite '.g~~n 1600000.0 1400000.0

= 1200000.0 V

~000010, 11600000.0 U 400000,0 200000.0 0.0 0 200 400 600 800 1000 1200 Distance From Source (Ift) .44 Return to Recalculate Ths Input Sheet 7 ." ' " .*: "

0

C DI OLY HYDOCABONCQNCEN¶TRAT[ON, ALONG L~ECNEiN TYE FO DilawermSureti ogta~i6

=, . . ..... i -i . ... a Ram EL) 133 399~ ~32 532 'I-ld 14

?7.1,14 ' 2 .157 9",,

Fied~aafar5.~ g

-9

- ~- -

m Oir.aay nsnteo Reaction :: Field Datafrom Site 350,000 ý' D~egradatibn 300.000 o 250.000 Inni00,000 t50.000 U 100,000 50.000 0,000

-4*i 0 200 400 600 800 LCalcuate 1000 1200 Distance From Source (ft) 1400 Retunm to Relculate This Input . Sheet 0

y BIOSCREEN~ Naua AtitenatinDeso Supor Syste EEW13400 W.,pukcb~

Ram~arne~ lor 2 Se~ge e~et~' Vs 991.4 Mdeld4rebLngh if4 890 f% _______________

or nr O ~zsc M~

r uaeledotTrea mW H

'~

'5dth' 198 ()

(r w) :- Varible' y Datat eb Used dr ~yK17 4,7 a1 POS~~tn () 6.SOURCEDAT

'l05 Surc Thcknss n St~oe{ 0! ) Vertical Plane Source: Look at Plume Cross-Section

2. DISPRSION ource,~oe~.

Lon ituia DIpm t alpha 22.4 (I) dInput Concentrations &Widths Wdi tIoc 'for Zones 1,2, and j etcal DisOni alpa 00 0) 0 0 or ~~20.

Estimated Plumle*Length 200000 . u Lp 80 0 n u m .

3;.ADSOR* iON"Source"Halfihfe

(.ee HeSuc:

etraeictr or R'1.0 Of mm (-j Yr)

Soil Bulko4Dek"y, ea tOrder N'i O olkgA) Mass 108000 (Kg) ýObserved Cfentevine.Concen ns at Montiton V.

A , IfNo Data Leave Blank orEnter'O,

-7. TLf..

FIELD.DATA.FOR*.MPARISON

.4.-BIODEGRDAT4ON "":.;i:::.,..:.:..*".i.;.*(:.,. Concentraion.(m g/ L 7

.. iDist Source

. CHOOSE 9 PEOF OUTPUT TOMSEE, i

odr 1iw 6nstn eus Reaction Mode.RU Ricalculate This Dela OxygenhD 165(g/) CNELE RUN ARRAY bse erus.,. Ir..o.n' e , 2i:.,'L) 04" 2 . w Output View Output Paste Example Dataset j O e ew Methane. Restore Formulas for Vs, CH4 66 '. "." Dispersivities, R,lambda, other (0

0

-4I

UDROCARBON CQNCýNTRATION.ALONG PLUME CENTERLINE (mg/L ZatO

'"D1S$OLVI~i: " "

, DilowcfromSpacefi.

E D!,2 356 445. .52 .. 801 890 .712:

I. -OderBecN 42080.405 18481,056' 15262.779 14356.706' 14264.298 14581,996 15102.933 15617,666 15838.907 15417,534 14071,013

. .... i 8559.4 ,0 i5402.741 145`3.36,.,,-, , 4T 0 l55446.32

,; 19442.5-,l

ý71 D3v3

~WQrer ~ JnstataneousReacton. 4kbDeadton ; ied Datatvr

ý 45000,0 40000,0 35000.0

.o ,0000.O t~O00.o -

vV000O.0 15000.0 U 10000.0 ':::

500.0

0. I 1 I!, f i ll !-! !l - .1 . ."1 .- I 1 1 r- I I ! r4 I I I! I! I 0 100 200 300 400 500 600 700 800 900 1000 Distance From Source (ft) 0)

0

-4

y K', (I.1:

DISSOLVED HYDROCARBON CONCENRATION A PLUME ENTERLNE "" L t* =

.i

..,i:Aac oi a ( liL I ..

", :. , " , ',] . ,l . . . .

2 -'.~

A~ ~ 2A

.'.' ~"; L...:,'

1!:-9..,' 4 216 4* C"1

, stO*-er. Decay 82.467 36.218 29.913 28.143 27.989 28.708 30,033 31.851 34.122 36,837 40,011

.. -.-,27',.4

. 57.!68 15.545 1Q,9,)2 1..

3 14.772 16ý286 18.32e 20.8'51 ,-3,7 7 .Q

-f~dtI Sit------------------------

Ru

~Ig~O~~Bocay. Instantaneou feacdon '~No Degradabon ::FedDthrm Ske 90.000 80.000 70.000

.4:p 0,ý 000 0,t.000 p0.000 U 30,000

P * ' .' .,

20.000 10,000 0.000 0 100 200 300 400 500 Distance From Source I 600 700 800 900 1000 Calculate Animation . Return to Recalculate This Input Mheet (0

04 0

-4

Mr. Slawinski, In response to your request for information for the tables, figures, and ndices for the October 19, 2005 Final Draft Groundwater Tritium Investigation Report for Dre en Generating Station, I am sending the December 7, 2005 Groundwater Tritium Investigation eport for Dresden Generating Station. The report dated Oct 19 is a draft that was circu ated for internal review within Exelon, and did not contain the requested tables, figures, and appendices. Instead, it relied on the use of this supporting data from previous drafts. The Dec 7 report is complete with the requested information. I also verified that the Dec 7 report Table of Contents for the figures, tables, and appendices matched that of the Oct 19 report.

Please contact me if you have any questions.

Respectfully,

/J. R. Kalb Environmental Chemist / Radiochemist Dresden Generating Station Chemistry 815-416-3215 randy.kalb @exeloncorp.com

The RETEC Group, Inc. David Meirl, Ph.D., CGWP 8605 W.Bryn Mawr Avenue,uite 3 ý--- *-cePresident Chicago, IL60631 Account Management www.retec.com (773) 714-9900 Phone dmeii(@retec.com (773) 714-9805 Fax (773) 383-9436 Cell 0 RETEC

ML102420146

Text

0.1 Project

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