ML073300639

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Groundwater Monitoring Report - Plant Vogtle Landfills 2, Solid Waste Permit Nos. 017-006D(L)(I), Burke County, Georgia, September 2007
ML073300639
Person / Time
Site: Vogtle  Southern Nuclear icon.png
Issue date: 09/14/2007
From: Godfrey J
Southern Nuclear Operating Co
To: Sean Mcmanus
Office of Nuclear Reactor Regulation, State of GA, Environmental Protection Div
References
017-006D(L)(I), EV-07-1702
Download: ML073300639 (71)
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{{#Wiki_filter:Southern Nlldear Operating Company, Inc. 42 Inverness Center Parkway Blrm',ngham, Alabama 35242 SOUTHERN COMPANY Energy to Serve Your World sM File: E03.41 Log: EV-07-1702 September 14, 2007 FEDERAL EXPRESS Vogtle Electric Generating Plant Landfill #2 Solid Waste Permit No. 017-006D(L)(I) Mr. Steve McManus Solid Waste Management Program Georgia Environmental Protection Division 4244 International Parkway, Suite 104 Atlanta, GA 30354

Dear Mr. McManus:

Pursuant to EPD Solid Waste Rule 391-3-4-.14, and in accordance with the Plant Vogtle Landfill #2 approved landfill groundwater monitoring program, Southern Nuclear is submitting the June, 2007 semi-annual groundwater monitoring report. This report was prepared for Southern Nuclear by the Dextra Group and was completed in September, 2007. There were no statistically significant detections found during this sampling event. Please find enclosed the June, 2007 landfill groundwater monitoring report for this sampling period. If you have any questions regarding this information, please contact Mickey Perry at (205) 992-6994. JMG/MEP:ahl Enclosure

EV-07-1702 Page 2 Georgia Environmental Protection Division Mr. Steve McManus cc: Mr. Jeff Cown (w/o) Mr. Michael Kemp (w/o) Mr. Earl Hinkle (w/o) Mr. AI Frazer (East Central Division)(w/o) Mr. Kurt Batsell (Dextra) (w/o)

EV-07-1702 Page 3 Georgia Environmental Protection Division Mr. Steve McManus bc: T. E. Tynan (w/o) J. G. Aufdenkampe (w/o) N. D. Dennis (w/o) C. L. Buck (w/o) S. A. Varnum (w/o) J. A. Joyner (w/o) D. G. Goodwin (Return Receipt) (w/o) SNC Document Management - Vogtle (Return Receipt)

September 12, 2007 Dextra Mr. Mickey Perry Southern Nuclear Operating Company, Inc. 40 Inverness Center Parkway p.Q. Box 1295 Birminghani,Alabama 35201-1295

Subject:

Georgia PbwerPlant Vogtle Private Landfill #2 Permit Numbers 017-006D(L)(1) Burke County, Georgia Groundwater Monitoring Report - June 2007

Dear Mr. Perry:

Please find the enclosed Groundwater Monitoring Report for the referenced facility. This report is submitted in accordance with the approved Groundwater Monitoring Plan and presents the results of routine semi-annual monitoring conducted at the landfill in June 2007. If you have any questions, please contact me at 770-578-9696. We appreciate the opportunity to assist SNC with this project. Very truly yours, uf5if C Kurt R. Batse1, PE Principal Cc: Mr. Don Goodwin, Plant Vogde The Dextra Group,Inc. 1205 Johnson Ferry Road, Suite 136-446 Marietta, GA 30068 EnvironmentalBllsinm SoMions (770) 578-9696 Phone (770) 321-5345 Fax

GROUNDWATER MONITORING REPORT PLANT VOGTLE LANDFILL #2 SOLID WASTE PERMIT Nos. 017-006D(L)(I) BURKE COUNTY, GEORGIA SEPTEMBER 2007 PREPARED FOR: Southern Nuclear Operating Company, Inc. 40 Inverness Center Parkway Birmingham, Alabama 35201 PREPARED By: Kurt R. Batsel, P.E. Georgia License Number 16594 The Dextra Group, Inc. 1205 Johnson Ferry Road Dextra Suite #136-446 Marietta, Georgia 30068

Plant Vogtle Landfill #2 Groundwater Monitoring Report, September 2007 Solid Waste Permit No. 017-006D(L)(I) Certification of Compliance or Non-Compliance Sampling and analysis has been conducted in accordance with the Georgia Environmental Protection Division's "Manual for Groundwater Monitoring" dated September 1991 and the Plant Vogtle Ground Water Monitoring Plan. Based on the results ofthis report, I, Mike Godfrey, certify that Plant Hatch is in compliance with the applicable rules regarding groundwater quality at a solid waste facility. i e Godfrey Manager - Environmental Affairs Southern Nuclear Operating Company, Inc. Groundwater Scientist Certification I, Kurt R. Batsel, certify that I am a qualified groundwater scientist demonstrated by a Georgia state registered professional engineer certification. I have sufficient training and experience in groundwater hydrology and related fields to make sound professional judgments regarding groundwater monitoring and contaminant fate and transport. I further certify that the data in this report has been prepared by myself or a subordinate working under my direction. Kurt R. Batsel, PE The Dextra Group, Inc.

TABLE OF CONTENTS 1 - Introduction 1 2 - Monitoring Well Network 1 3 - Groundwater Flow Rate and Directional Data 1 3.1 Geology/Hydrogeology 3.2 Groundwater Elevations and Gradients 4 - Sampling Procedures and Parameter Analyses 3 4.1 Procedures and Field Measurements 4.2 Parameter Analyses 5 - Groundwater Quality Evaluation 3 5.1 Detected Parameters 5.2 Statistical Analyses 6 - Conclusions 4 In Order Following Page 4 Tables 1 - Groundwater Elevations and Monitoring Well Construction Details 2 - Groundwater Sampling Field Measurements 3 - Constituents for Detection Monitoring 4 - Summary of Detected Parameters Figures 1 - Groundwater Contour Elevation Map, June 5, 2007 Appendices A - Hydraulic Gradient Calculation Sheet B - Laboratory Analytical Report C - Statistical Analyses

1-Introduction This report presents the results of groundwater sampling conducted in June 2007 at private solid waste Landfill #2 operated by Southern Nuclear Operating Company, Inc. (SNC) at Plant Vogtle in Waynesboro, Georgia. Groundwater monitoring was initiated in 2002 in accordance with the approved Groundwater Monitoring Plan for the landfills. The landfill is operated under Solid Waste Permit # 017-006D(L)(I) and is used for disposal of non-putrescible, non-liquid office and solid waste as well as construction/demolition debris such as asbestos insulation, wooden pallets and concrete. The active trench is used only for asbestos disposal. Sampling, analyses and data evaluation were conducted in accordance with the rules of the Georgia Department of Natural Resources Environmental Protection Division (EPD), Chapter 391-3-4, the September 1991 "Manual for Groundwater Monitoring" and the approved Groundwater Monitoring Plan for the landfills. The findings of the initial four sampling events, conducted from August 2002 through December 2002, and subsequent semi-annual sampling events are presented in reports previously submitted to the EPD. This report presents the results of the June 2007 semi-annual monitoring event. Subsequent reports will be prepared upon completion of semi-annual monitoring events as scheduled in the Groundwater Monitoring Plan. 2 - Monitoring Well Network The groundwater monitoring well network consists of four pe=anent monitoring wells located along the north, east and south waste unit management boundaries of Landfill #2 (Figure 1). As shown in the figures, the wells are located outside of, but as close as practical to, the waste disposal areas. The wells are screened within the uppermost water-producing zones underlying the landfill, which occur from approximately 35 to 60 feet below land surface. The four pe=anent groundwater monitoring wells at Landfill #2 were installed in September 2001 after advancing a total of eight deep soil borings around the landfill boundary. The upgradient well is GWA-2/MW-2 and the downgradient, or compliance, wells are GWC-3/MW-3, GWB-4/MW-4 and GWC-11/MW-11. The well construction details are presented in Table 1. The wells will be referred to as GWA-2, GWC-3, GWB-4 and GWC-11 in this report consistent with the EPD's well identification guidelines. 3 - Groundwater Flow Rate and Directional Data 3.1 Geology/Hydrogeology The geology of the Plant Vogtle site consists of sedimentary deposits within the Coastal Plain physiographic province of Georgia. These sediments consist of unconsolidated sands, silts and clays comprised of marine and non-marine fluvial deposits. Marls and limestone were also encountered at depth in deep borings completed at the landfills. A boring completed to approximately 126 feet below land surface at the northwest boundary of Landfill #2 appears to have been completed just into or immediately on top of the Utley Limestone member. The marls encountered during drilling were components of the Irwinton Sand member. Either all or parts of the Barnwell Group members (except the Utley Limestone member) were also encountered in the other borings conducted at the landfill. Underlying the Barnwell Group is the Lisbon Formation with its uppermost unit, the Blue Bluff Marl, located immediately under the Utley Limestone. This marl layer, approximately 70 feet

thick, is a near-impermeable layer that effectively confInes the Tertiary and Cretaceous aquifers, the two confmed aquifers beneath the Plant site. The occurrence of groundwater underlying the landflll appears in confmed, semi-confmed, unconfmed, and perched hydrogeologic units. Groundwater is found primarily in sands, silty sands, clayey sands and marl limestone interfaces. The main difference between boring/well water production characteristics and aquifer conflning characteristics appears to be the thickness of the water-producing zone, the grain size of the sand component, the sand/clay ratio and the characteristics of the marl/limestone interface. Groundwater may also exist in an unconfmed water table aquifer in the Barnwell sands and limestone that overlie the marl. The water table aquifer at the site is on an interfluvial ridge, or a topographically high area in which the groundwater in the water table discharges along streams that surround the topographic high. The streams eventually discharge to the Savannah River. 3.2 Groundwater Elevations and Gradients During well installation, the occurrence of groundwater was determined by collecting continuous split spoon samples beginning approximately fIve feet above the location of expected groundwater-producing zones. At the landflll, groundwater was generally found in water producing zones less than one foot thick and was observed to be under semi-confIned or confIned conditions. Upon completion of all drilling activities, measuring points were located on the tops of the well casings and surveyed relative to mean sea level (msl). During each sampling event, depth to water measurements were recorded in the wells from the surveyed elevations using an electronic water-level indicator. The water level measurements were then subtracted from the appropriate measuring point elevations to determine groundwater elevations in the wells. Hydraulic conductivity (K.) in the wells was measured on September 26, 2001. The values ranged from 5.634 x 10-4 cm/sec in GWB-6 to 3.064 x 10-2 cm/sec in GWA-2. Depth to water measurements and groundwater elevations for the wells at Landflll 2 are presented in Table 1. Groundwater elevations measured during the sampling events to date indicate groundwater underneath Landflll2 trends from a relatively higher elevation at the eastern/northeastern portion of the landfill (GWA-2) to relatively lower elevations to the west/southwest beneath the landflll (Figure 1). Well GWC-11 is not used to construct the potentiometric surface map because the uppermost water-bearing unit at this location appears to be within a different hydrologic zone based on the signifIcantly lower groundwater elevation measured in well GWC-11 compared to wells GWA-2, GWC-3 and GWB-4. The eastern/northeastern portion of the landflll hydraulic gradient of 0.013 (shown on Figure 1 for June 2007) was calculated using a three-point problem from potentiometric surface elevations in monitoring wells GWAc2, GWC-3 and GWB-4. The west/southwestern portion of the landfill hydraulic gradient of 0.050 (shown on Figure 1 for June 2007) was calculated using the three-point problem from potentiometric surface elevations in monitoring wells GWA-2, GWC-3 and GWC-11. The calculations used in determining the gradient are provided in AppendixA. The hydraulic gradient has ranged from a minimum of 0.01 (October 2002 and December 2004) to a maximum of 0.08 Gune 2003). 2

4 - Sampling Procedures and Parameter Analyses 4.1 Procedures and Field Measurements Prior to sample collection during each sampling event, depth to water measurements are recorded in each well from the surveyed elevations using an electronic water level indicator. The water level indicator is decontaminated using a potable water and Alconox wash and a distilled water rinse between use at each well. The water level measurements are then subtracted from the appropriate measuring point elevations to determine the groundwater elevations in the wells. Groundwater samples were collected from all monitoring wells after the wells were properly purged according to the EPA document entitled "Low-Flow Purging & Sampling of Groundwater Monitoring Wells (Bulletin QAD023)". The wells were purged and sampled using QED SamplePro pumps equipped with Teflon bladders. Purge rates were matched to the recovery rates of the wells, verified by periodic depth to water measurements to determine draw-down during purging. Purging was conducted until at least three consecutive stable readings of pH, conductivity, and turbidity were recorded. Groundwater samples were then collected directly into pre-preserved sample containers supplied by the laboratory. Final measurements of pH, conductivity, and turbidity were performed to verify that these parameters remained stable during sampling. The well water temperature was added as a field parameter monitored during the purging of the wells as of the June 2007 groundwater monitoring event. All field instruments were calibrated in the field daily prior to use and at the conclusion of each sampling event. The field measurements are provided in Table 2. After each sample was collected, the SamplePro pumps and air lines were decontaminated according to the following protocol: The pump and air line were placed on clean plastic; The pump was disassembled and the bladder was removed; The pump was sprayed with a potable water and Alconox solution, followed wi.th a distilled water rinse until all soap residue was removed; A new pump bladder was then installed in the pump prior to reassembly; and The pump air line was placed in a clean plastic bag between use at each well. 4.2 ParameterAna!Jses In accordance with the approved Groundwater Monitoring Plan, the groundwater samples and field and laboratory quality assurance/quality control (QA/Qc) samples were analyzed for the Chapter 391-3-4 Appendix I list of parameters, which consists of total metals and volatile organic compounds (Table 4). The field QA/QC samples consisted of duplicate samples, trip blanks and equipment blanks. Metals analyses were conducted using EPA Methods 6010B/7841, and VOCs analyses were conducted using EPA Methods 601OB/8260B and 504.1 to provide sufficiently sensitive quantitation limits for comparison with maximum contaminant limits. Advanced Chemistry Labs, Inc., Atlanta, Georgia performed the laboratory analyses. The complete laboratory analytical reports, which include field and laboratory QA/QC results and chain-of-custody forms, are provided in Appendix B. 5 - Groundwater Quality Evaluation 5.1 Detected Parameters Table 4 presents a summary of all analyzed parameters detected above the laboratory method reporting limits. Barium was detected at 0.029 milligrams per liter (mg/l) in well GWA-2 and 0.020 3

mg/l in well GWC-3. The maximum contaminant level (MCL) for barium is 2.0 mg/I. Nickel was detected at 0.022 mg/l in well GWA-2 and 0.023 mg/lin well GWB-4. The MCL for nickel is 0.10 mg/I. Zinc was detected at 0.084 mg/l in well GWA-2, 0.248 mg/l in well GWC-3, and 0.259 mg/l in well GWB-4. No organic parameters were detected during this monitoring event. No parameters were detected in any of the field or laboratory QA/QC samples, and the laboratory QA/QC checks were within acceptable limits. 5.2 StatisticalAnajyses In accordance with the approved Groundwater Monitoring Plan, statistical analyses were conducted for each constituent detected in the compliance well samples for this sampling event. The analyses were conducted to help identify any significant increase in constituent concentrations in downgradient, or compliance, well samples over samples representative of background water quality. The analyses were conducted consistent with U.S. EPA recommended methods as detailed in the guidance document "Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities - Interim Final Guidelines" (1989) and the corresponding Addendum (1992). The following methodology was used to evaluate the data: The distribution of the data was first evaluated for normality using either the Shapiro-Wilkes Test (for parameters with less than 50 samples) or the Shapiro-Francia Test (for parameters with greater than 50 samples) as recommended in the 1992 EPA guidance. The tests indicate that the concentrations of all detected parameters do not follow normal distributions. For the well data sets at the landfill, the Kruskal-Wallis non-parametric analysis of variance method was used to compare the concentrations of individual parameters in each compliance well to the concentrations of these parameters in the background well. This method is recommended by the 1992 EPA guidance for non-normal sample sets that have between 15% and 90% non-detects. The detailed statistical analyses are provided in Appendix C and the results are summarized below. At Landfill #2, statistical analysis was performed for the three detected parameters barium, nickel and zinc. The analyses do not indicate statistically significant higher concentrations for these parameters in the compliance well samples compared to the concentrations in the background well sample. 6 - Conclusions As no statistically significant detections were found during this monitoring event, no modifications to the monitoring program or additional notices in the operating record are required at this time. 4

\\! TABLES

Table 1 Southern Nuclear Operating Company Plant Vogtle Landfill #2 Groundwater Elevations and Monitoring Well Construction Details Total Boring Total Well Riser Screened Groundwater Measuring Point Elevation Ground Surface Elevation Depth to Water Depth Depth Height l"teNal Elevation Well 10 Date (feet, msl) (feet, msl) (feet, topvc) (feet, bls) (feet, topvc) (feet) (feet, msl) (feet, msl) GWA-21MW-2 9/26/2001 249.41 246.76 40.02 57 47.70 2.65 201.7610211.76 209.39 7/29/2002 41.69 207.72 9/9/2002 41.64 207.77 10/21/2002 42.72 206.69 121312002 40.69 206.72 6/2412003 37.56 211.83 12/17/2003 39.98 209.43 6/15/2004 39.59 209.82 12/28/2004 43.02 206.39 6/13/2005 39.41 210.00 12/5/2005 40.40 209.01 6/6/2006 40.35 209.06 121412006 41.49 207.92 8/5/2007 40.30 209.11 GWC-31MW-3 9/26/2001 250.41 247.81 50.45 62 52.60 2.60 197.81 to 207.81 199.96 7/2912002 50.05 200.36 9/912002 50.79 199.62 10/21/2002 49.30 201.11 12/3/2002 50.26 200.15 6/24/2003 51.58 198.83 12/1712003 47.89 202.52 6/15/2004 47.44 202.97 12128/2004 49.13 201.28 6/13/2005 46.77 203.64 12/5/2005 47.34 203.07 6/6/2006 46.96 203.45 12/4/2006 47.60 202.81 6/512007 46.80 203.61 GWB-4/MW-4 9126/2001 242.40 239.83 39.84 57 46.57 2.57 193.6310203.83 202.56 7/29/2002 40.06 202.34 9/912002 41.27 201.13 10/21/2002 40.50 201.90 1214/2002 39.65 202.75 6/24/2003 38.10 204.30 12117/2003 39.53 202.87 6/15/2004 39.46 202.94 12/28/2004 40.02 202.38 6/13/2005 38.96 203.44 121512005 39.70 202.70 61612006 39.46 202.94 12/4/2006 40.30 202.10 6/512007 39.33 203.07 GWC-11/MW-11 7/2912002 227.53 225.09 84.80 65 67.44 2.44 160.09 to 170.09 162.73 9/9/2002 59.99 167.54 10/21/2002 65.27 162.26 12/4/2002 65.49 162.04 6/24/2003 59.72 167.61 1211712003 59.33 168.20 6/15/2004 60.69 16684 12/2812004 62.71 184.82 6/13/2005 62.96 164.57 121512005 62.73 164.80 6/6/2006 68.10 159.43 12/4/2006 63.89 163.84 6/512007 66.36 161.17 Notes: Ground surface measured at survey bolt set in concrete pad at base of protective casing. msl ;:: mean sea level. topvc =measured from top of pvc riser. bls =below land surface. Page 1 of 1

Table 2 Southern Nuclear Operaling Company Plant Voglle Landfill #2 Groundwater Sampling Field Measurements ConductivitY'1 Turbidml' Gallons Well 10 Date nH Temoerature Puraed Odor Color Comments GWA-21MW-2 912612001 Well development only 712912002 4.69 19 13.6 2.5 none none 9/912002 4.51 24.9 7.53 none none 1012112002 5.17 18 1.31 3.1 none none 121312002 5.30 13 9.1 3.5 none none 6/2412003 6.28 26.9 5.76 1.0 none none 1211712003 4.93 22.7 4.5 3.5 none none 6/1612004 6.97 15.32 5.9 1.5 none none 1212812004 4.80 10.3 9.67 2.0 none none 611412005 5.28 17.8 8.65 2.5 none none 1216/2005 6.82 17 6.36 2.0 none none 6/6/2006 6.58 18 6.36 2.0 none none 121412006 4.66 24 8.6 1.5 none none 6/512007 4.78 26 71.6 6.1 2.5 none none GWC-3/MW-3 912812001 Well development only 7/2912002 4.08 27.9 22.2 1.3 none none 9/912002 6.03 36.5 4.08 0.5 none none 1012112002 176 35.6 <0.5 gal Too little water to purge and sample 12J312002 5.51 488 14.0 <0.5 gal Too little water to purge and sample 612412003 <0.5 gal none none Too little water to purge and sample 1211712003 6.59 22.7 2.79 2.0 none none 6116/2004 4.91 40.8 5.78 1.25 none none 1212812004 Too litUe water to purge and sample 6/1412005 5.83 29.5 4.25 1.25 none none 121612005 5.88 35 5.89 1.50 none none 61612006 5.28 38 1.23 1.00 none none 121412006 4.7 40 1.4 0.50 none none 6/512007 4.93 50 72.4 4.93 1.00 none none GWB-4IMW-4 9126/2001 4.73 36.0 15.5 35.0 Well development 0~1y 7129/2002 4.21 289 3.63 2.0 none none 9/912002 4.35 34.8 0.55 2.0 none none 10/2112002 5.01 25 6.44 3.0 none none 121412002 5.51 987 2.60 4.0 none none 612412003 5.33 36<1 5.27 2.0-none none 1211712003 4.62 3.55 0.00 1.5 none none 6/1612004 4.63 33.80 1.40 3.3 none none 1212812004 4.43 20.70 0.00 2.0 none none 6/1412005 4.66 38.25 2.50 2.5 none none 121712005 4.80 43.00 2.08 1.5 none none 6/6/2006 4.55 48.00 2.22 1.5 none none 121412006 4.63 41.00 1.02 0.5 none none 6/512007 4.69 40.00 70.70 0.83 0.5 none none GWC-ll1MW-11 712912002 5.30 67.5 36.6 4.0 none pale white 9/912002 6.24 97.0 6.51 2.0 none none 1012112002 5.05 75.0 8.05 1.8 none none 1214/2002 5.72 57.1 8.10 2.0 none none 6124/2003 6.93 70.0 2.70 2.5 none none 1211712003 7.04 69.2 11.2 4.5 none none 6116/2004 6.10 58.9 6.1 3.5 none none 1212812004 5.85 30.5 9.3 2.0 none none 6114/2005 5.98 33.2 8.6 2.5 none none 121712005 5.95 32.0 3.0 2.0 none none 6/612006 6.58 48.0 10.0 4.0 none none 12/4/2006 6.02 10.0 29.0 4.0 none none 6/512007 Too litUe water to purge and sample Notes: - =no data recorded 11 - CondUctivity in units of umhoslsec 12. Turbidity in units of NTU 1 of1

Table 3 Southern Nuclear Operating Company Plant Vogtle Landfill #2 Appendix I to Part 40 CFR Part 258: Constituents for Detection Monitoring (1) Conunon Name (2) Inorganic Constituents: (1) Antimony (2) Arsenic (3) Barium (4) Beryllium (5) Cadmium (6) Chromium (7) Cobalt (8) Copper (9) Lead (10) Nickel (11) Selenium (12) Silver (13) Thallium (14) Vanadium (15) Zinc Organic Constituents: (16) Acetone (17) Acrylonitrile (18) Benzene (19) Bromochloromethane (20) Bromodichloromethane (21) Bromoform; Tribromomethane (22) Carbon disulfide (23) Carbon tetrachloride (24) Chlorobenzene (25) Chloroethane; Ethyl chloride (26) Chloroform; Trichloromethane (27) Oibromochloromethane; Chlorodibromomethane (28) 1,2-0ibromo-3-chloropropane; OBCP (29) 1,2-0ibromoethane; Ethylene dibromide; EOB (30) o-Oichlorobenzene; 1,2-0ichlorobenzene (31) p-Oichlorobenzene; 1,4-0ichlorobenzene (32) trans-1,4-0ichloro-2-butene (33) 1,1-0ichloroethane; Ethylidene chloride (34) 1,2-0ichloroethane; Ethylene dichloride (35) 1,1-0ichloroethylene; 1,1-0ichloroethene; Vinylidene chloride (36) cis-1,2-0ichloroethylene; cis-1,2-0ichloroethene (37) trans-1,2-0ichloroethylene; trans-1,2-0ichloroethene (38) 1,2-0ichloropropane; Propylene dichloride (39) cis-1,3-0ichloropropene (40) trans-1,3-0ichloropropene (41) Ethylbenzene (42) 2-Hexanone; Methyl butyl ketone (43) Methyl bromide; Bromomethane (44) Methyl chloride; Chloromethane Page 1 of 2 EPA Method 6010B/7041 6010B/7061 6010B/7091 6010B/7091 6010B/7131 6010B/7191 6010B/7201 6010B/7211 6010B/7421 6010B/7520 6010B/7741 6010B/7761 6010B/7841 6010B/7911 6010B/7951 8260

Table 3 (continued) Southern Nuclear Operating Company, Inc. Plant Vogtle Landfill #2 Appendix I to Part 40 CPR Part 258: Constituents for Detection Monitoring (1) Common Name (2) (45) Methylene bromide; Dibromomethane (46) Methylene chloride; Dichloromethane (47) Methyl ethyl ketone; MEK; 2-Butanone (48) Methyl iodide; Iodomethane (49) 4-Methyl-2-pentanone; Methyl isobutyl ketone (50) Styrene (51) 1,I,l,2-Tetrachloroethane (52) 1,I,2,2-Tetrachloroethane (53) Tetrachloroethylene; Tetrachloroethene; Perchloroethylene (54) Toluene (55) 1,I,I-Trichloroethane; Methylchloroform (56) 1,1, 2-Trichloroethane (57) Trichloroethylene; Trichloroethene (58) Trichlorofluoromethane; CFC-ll (59) 1,2,3-Trichloropropane (60) Vinyl acetate (61) Vinyl chloride (62) Xylenes EPA Method 8260 (1) This list contains 47 volatile organics for which possible analytical procedures provided in EPA Report SW-846 "Test Methods for Evaluating Solid Waste," third edition, November 1986, as revised December 1987,includes Method 8260; and 15 metals for which SW-846 provides either Method 6010 or a method from the 7000 series of methods. (2) Common names are those widely used in government regulations, scientific publications, and commerce; synonyms exist for many chemicals. Page 2 of 2

Table 4 Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters June 2007 Page 1 of 13 sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ugll or ppb Bold indicates detected concentration is greater than the MCL. WEll SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 0.020 Sal NS sal 0.023 NS 0.248 0.259 NS sal sal NS sal sal NS sal sal NS sal sal NS sal sal NS sal sal NS sal sal NS sal sal NS sal sal NS sal sal sal sal sal sal sal sal sal 0.029 0.022 0.084 2.00 0.10 NA NA 100 75 5 70 NA 7 10000 2 Sarium Nickel Zinc CONSTITUENT 1,1-Dichloroethane Chlorobenzene 1,4-Dicholorbenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride Organics2 Metals1

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters December 2006 CONSTITUENT MCl WEll SAMPLES GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 Metals1 Sarium 2.00 0.054 0.020 0.023 0.065 Nickel 0.10 0.022 Sal 0.029 0.023 Zinc NA 0.109 0.174 0.073 0.056 Mercurl 0.002 Sal Sal Sal Sal Organics2 1,1-Dichloroethane NA Sal Sal Sal Sal Chlorobenzene 100 Sal Sal Sal Sal 1,4-Dicholorbenzene 75 Sal Sal Sal Sal Methylene chloride 5 Sal Sal Sal Sal cis-1,2-Dichloroethene 70 Sal Sal Sal Sal Trichlorofluoromethane NA Sal Sal Sal Sal 1,1-Dichloroethene 7 Sal Sal Sal Sal Xylenes (Total) 10000 Sal Sal Sal Sal Vinyl chloride 2 Sal Sal Sal Sal Sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ug/I or ppb 3Appendix 1\\ parameter Bold indicates detected concentration is greater than the MCL.,. Page 2 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle landfill #2 Summary of Detected Parameters June 2006 CONSTITUENT MCl WEll SAMPLES GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 Metals1 Sarium 2.00 Sal sal sal 0.032 Zinc NA 0.122 0.077 0.128 0.034 Organics2 1,1-Dichloroethane NA Sal sal sal sal Chlorobenzene 100 sal sal sal sal 1,4-Dicholorbenzene 75 sal sal sal sal Methylene chloride 5 Sal sal sal sal cis-1,2-Dichloroethene 70 sal sal sal sal Trichlorofluoromethane NA sal sal sal sal 1,1-Dichloroethene 7 sal sal sal sal Xylenes (Total) 10000 Sal sal sal sal Vinyl chloride 2 Sal sal sal sal sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ug/l or ppb Bold indicates detected concentration is greater than the MCL Page 3 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters December 2005 Organics2 1,1-Dichloroethane NA sal sal Chlorobenzene 100 sal sal 1,4-Dicholorbenzene 75 sal sal Methylene chloride 5 Sal sal cis-1,2-Dichloroethene 70 sal sal Trichlorofluoromethane NA sal sal 1,1-Dichloroethene 7 sal sal Xylenes (Total) 10000 Sal sal Vinyl chloride 2 Sal sal WEll SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 CONSTITUENT Metals1 Sarium Zinc 2.00 NA sal 0.08 0.025 0.137 0.021 Sal 0.082 0.181 sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ugll or ppb Bold indicates detected concentration is greater than the MCL. Page 4 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters June 2005 CONSTITUENT Metals 1 WEll SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1,4-Dicholorbenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2.00 NA NA 100 75 5 70 NA 7 10000 2 0.021 Sal 0.042 0.034 Sal Sal 0.029 0.025 Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ugll or ppb Bold indicates detected concentration is greater than the MCL. Page 5 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters December 2004 CONSTITUENT WELL SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 SQl - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 3£11-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ug/I or ppb Bold indicates detected concentration is greater than the MCL. Metals1 Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1,4-Dicholorbenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2.00 NA NA 100 75 5 70 NA 7 10000 2 SQl NS 0.021 SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl SQl NS SQl SQl Page 6 of 13

Table 4 (Continued), Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters June 2004 CONSTITUENT WEll SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 Metals1 Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1,4-Dicholorbenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2.00 NA NA 100 75 5 70 NA 7 10000 2 Sal 0.020 ' Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal 7 Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available 1Metals concentrations in mg/l or ppm 20rganics concentrations in ug/I or ppb Bold indicates detected concentration is greater than the MCL. Page 7 of 13

Table 4 (Continued), Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters December 2003 CONSTITUENT Metals1 WEll SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 Sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available 1Metals concentrations in mg/l or ppm 20rganics concentrations in ug/I or ppb Bold indicates detected concentration is greater than the MCL. Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1,4-Dicholorbenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2.00 NA NA 100 75 5 70 NA 7 10000 2 Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal 0.022 Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal 6 Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Page 8 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters June 2003 CONSTITUENT Metals1 WEll SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 Page 9 of 13 sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ug/I or ppb Bold indicates detected concentration is greater than the MCL. Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1,4-Dicholorbenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2.00 NA NA 100 75 5 70 NA 7 10000 2 sal NS sal sal sal NS sal 0.029 sal NS sal sal sal NS sal sal sal NS sal sal sal NS sal sal sal NS sal sal sal NS sal sal sal NS sal sal sal NS sal sal sal NS sal sal

CONSTITUENT Metals1 Table 4 (Continued), Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters December 2002 WEll SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWB-4/MW-4 GWB-4/MW-43 GWC-11/MW-11 BQl - Below quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available lMetals concentrations in mg/l or ppm 20rganics concentrations in ug/I or ppb Bold indicates detected concentration is greater than the MCL. Barium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1,4-Dicholorbenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2.00 NA NA 100 75 5 70 NA 7 10000 2 0.015 0.020 0.021 0.020 0.018 BQl 0.047 BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl , BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl BQl Page 10 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters October 2002 WEll SAMPLES GWA-2/MW-2 GWC-3/MW-33 GWS-4/MW-4 GWC-11/MW-11 CONSTITUENT Metals1 Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1A-Dichlorobenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride MCl 2 NA NA 100 75 5 70 NA 7 10000 2 Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal NS NS NS NS NS NS NS NS NS NS NS 0.021 0.025 Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal Sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available NS - Not sampled; well dry or insufficient recharge to sample well 1Metals concentrations in mg/l or ppm 20rganics concentrations in ug/I or ppb Bold indicates detected concentration is greater than the MCL. Page 11 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters September 2002 CONSTITUENT Metals1 WELL SAMPLES MCl GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 sal - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available 1Metals concentrations in mg/l or ppm 20rganics concentrations in Ug/I or ppb Bold indicates detected concentration is greater than the MCL. Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1A-Dichlorobenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2 NA NA 100 75 5 70 NA 7 10000 2 sal sal 0.021 0.020 sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal sal, sal sal Page 12 of 13

Table 4 (Continued) Southern Nuclear Operating Company Plant Vogtle Landfill #2 Summary of Detected Parameters July 2002 CONSTITUENT Metals1 MCl WEll SAMPLES GWA-2/MW-2 GWC-3/MW-3 GWS-4/MW-4 GWC-11/MW-11 Sarium Zinc Organics2 1,1-Dichloroethane Chlorobenzene 1,4-Dichlorobenzene Methylene chloride cis-1,2-Dichloroethene Trichlorofluoromethane 1,1-Dichloroethene Xylenes (Total) Vinyl chloride 2 NA NA 100 75 5 70 NA 7 10000 2 0.027 SQl SQl SQl SQl SQl SQl SQl SQl SQl SQl SQl 0.021 SQl SQl SQl SQl SQl SQl SQl ' SQl 6 6 SQl SQl SQl 5 SQl SQl SQl SQl SQl SQl 0.085 0.034 SQl SQl SQl SQl SQl SQl SQl SQl SQl SQl - Selow quantification level MCl - Maximum Contaminant level per EPD Rule Chapter 391-3-5; NA - None available 1Metals concentrations in mg/l or ppm 20rganics concentrations in Ug/I or ppb Bold indicates detected concentration is greater than the MCL. Page 13 of 13

FIGURES

rOlu,'llllM.l:I1ULWI'-!OV/tWNl". AT1VTI"-lJoJl.\\'}u.., 1'l)ll.NTt(ll>ff-'!'IUC cor-;n lUI. UN1:- \\1'IlJIlINIl:Jl.\\';\\LS (;R()L'N))\\\\'\\TI~R1;11 \\])I),r-.," (;R(lLND\\\\AT.l:R Fj,(j\\\\ DIIUFTJON D.~TE<)FrfKTlOGRArtrY,~!~= B-8. ARA'UO:'\\Jill ~OlLOORll'G ~LM-{> e ME1HANE ~'El..L

  • _tJ,tJ,f

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ApPENDIX A - HYDRAULIC GRADIENT CALCULATION SHEETS o .,~....., ,i:~

Plant Vogtle Landfill #2 Gradient Calculation (based on three-point problem) June 2007 Monitoring Event Well Designation GWA-2/MW-2 GWC-3/MW-3 GWB-4/MW-4 Water Table Elevation 209.11 203.61 203.07 Northing 11755.95 12048.48 11205.40 Easting 9622.59 8881.72 9466.20 Gradient Calculation from fitting a plane to three points a Xl + b Yl + cZl + d = 0 a x2 + b Y2 + CZ2 + d = 0 a Xs + b Ys + cZs + d = 0 where (Xi,Yi) are the coordinates of the well and zi is the head, i = 1,2,3 The gradient is calculated from the square root of (a2 + b2) Southwest Gradient Wells of Interest = (GWA-2, GWC-3 & GWB-4) (High-Mid-Low) X Y z GWA-2/MW-2 11755.95 9622.59 209.11 GWC-3/MW-3 12048.48 8881.72 203.61 GWB-4/MW-4 11205.40 9466.20 203.07 9622.59 209.11 1 1= a= 8881.72 203.61 1 3614.7098 9466.20 203.07 1 11755.95 209.11 1 b= 12048.48 203.61 1 = -4794.906 11205.40 203.07 1 11755.95 9622.59 1 c= 12048.48 8881.72 1 = -453634.7 11205.40 9466.20 1 11755.95 9622.59 209.11 1= d= 12048.48 8881.72 203.61 -6225797 11205.40 9466.20 203.07 zO = -13.72425175 mx= 0.007968327 my= -0.010569971 ISouthwest Gradient = 0.0131 Page 1 of 1

ApPENDIX B - LABORATORY ANALYTICAL REPORT JUNE 2007

ADVANCED CHEMISTRY LABS, INC. !ACLI Phone: (770) 4:":0~9-:-1:-:44~4":"""'-------------~3~03~9~A~mw-~i1e-r~R~o-a"":'d-.~S~ui~te-1~O~O~*~A~t1:-a~nta~. G~A~3~O~36~0~ Fax: (770) 409-1844 P.O. Box 88610* Atlanta. GA 30356 e-mail: acl@acl-Iabs.net www.advancedchemislrylabs.com Laboratory Report ACL Project #: 53573 Client Proj #: Vogtle LF #2 Prepared For: The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Attention: Mr. Kurt Batsel Report Date: 07/09/2007 This report contains 18 pages. (including this cover page and chain of custody) Technical Director Advanced Chemistry Labs is a woman owned small business concern. If you have any questions concerning this report, please do not hesitate to call us at (770) 409-1444. This report may not be reproduced, except in full, without the written permission of ACL (Advanced Chemistry Labs, Inc). ACL certifies that the following analytical results meet all the requirements of NELAC. ACL is accredited by the National Environmental Laboratory Accreditation Program (NELAP). ACL maintains the following certifications: NELAC (E87212), South Carolina (98009001), North Carolina (362), Florida (E87212), USDA Soil Import License (S-36503). Page 1 of 18

IACLI ADVANCED CHEMISTRY LABS, INC Phone: (770) 4~0~9-~14~4~4~----------~3~0~39~Am-w~i1e-r~R-oa-d~, ~S""'!Ui'!""te~1~0~0,""'!A~tl-an~ta";'.~G~A~3~0~36~0 Fax: (770) 409-1844 P. O. Box 88610. Atlanta, GA 30356 e-mail: acl@acl-Iabs.net Data Qualifier Codes Code A B BQl OW E H J PQl TIC Description Value reported is the mean of two or more determinations; Indicates the analyte was detected in the sample and method blank; Below practical quantitation limit; Results reported on a dry-weight basis (ex: mg/kg,dw); Estimated value: (i) sample received or analyzed beyond the accepted holding time; (ii) sample received at improper temperature; (iii) the continuing calibration for an analyte did not meet qc criteria; Estimated value; result higher than the highest calibration standard; Reported value is between the method detection limit and the practical quantitation limit; Practical quantitation limit; Tentatively identified compound; Not analyzed due to interferences; Upon client request, a statement of the test result estimated uncertainty can be provided. NOTE: Unless otherwise noted, all results are reported on an as received basis. Page 2 of 18

Phone: (770) 409-1444 Fax: (770) 409-1844 e-mail: acl@acl-Iabs.net ADVANCED CHEMISTRY LABS, INC. 3039 Amwiler Road

  • Suite 100
  • Atlanta, GA 30360 P.O. Box 88610
  • Atlanta, GA 30356 www.advancedchemlstrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACL Project #: Date Received: Date Reported: Vogtle LF #2 53573 06/08/2007 07/09/2007 v.o. (50308/82608) - Appendix I Sample 10: GWA-2/MW-2 Matrix: Water Date Sampled: 06/05/2007 Date Extracted: Date Analyzed: 06/14/2007 ACL Sample #: 255925 Units: ~g/L Analyst: ME Analvte Result PQL Analvte Result PgL m & p-Xylenes Sal 10 Methylene chloride Sal 5 Acetone Sal 100 Styrene Sal 5 Acrylonitrile Sal 50 1,1,1,2-Tetrachloroethane Sal 5 Senzene Sal 5 1,1,2,2-Tetrachloroethane Sal 5 Sromochloromethane Sal 5 Tetrachloroethene Sal 5 Sromodichloromethane Sal 5 Toluene Sal 5 romoform Sal 5 1,1,1-Trichloroethane Sal 5 Carbon disulfide Sal 5 1,1,2-Trichloroethane Sal 5 Carbon tetrachloride Sal 5 Trichloroethene Sal 5 Chlorobenzene Sal 5 Trichlorofluoromethane Sal 5 Chloroethane Sal 10 1,2,3-Trichloropropane Sal 5 Chloroform Sal 5 Vinyl acetate Sal 50 1,2-Dibromo-3-ehloropropane Sal 20 Vinyl chloride Sal 2 Dibromochloromethane Sal 5 o-Xylene Sal 5 1,2-Dibromoethane Sal 5 trans-1 A-Dichloro-2-butene Sal 10 1,2-Dichlorobenzene Sal 5 1A-Dichlorobenzene Sal 5 1,1-Dichloroethane Sal 5 1,2-Dichloroethane Sal 5 1,1-Dichloroethene Sal 5 cis-1,2-Dichloroethene Sal 5 trans-1,2-Dichloroethene Sal 5 1,2-Dichloropropane Sal 5 cis-1,3-Dichloropropene Sal 5 trans-1,3-Dichloropropene Sal 5 Ethylbenzene Sal 5 2-Hexanone Sal 50 Methyl bromide Sal 10 Methyl chloride Sal 10 r"'\\IIethyl ethyl ketone Sal 100 ~I Sal 5 ",. Methyl iodide 4-Methyl-2-pentanone Sal 50 Methylene bromide Sal 5 Page 3 of 18

Phone: (770) 409-1444 Fax: (770) 409-1844 e-mail: acl@acl-Iabs.net ADVANCED CHEMISTRY LABS, INC. 3039 Amwiler Road* Suite 100

  • Atlanta. GA 30360 P.O. Box 88610* Atlanta. GA 30356 www.advancedchemistrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACL Project #: Date Received: Date Reported: Vogtle LF #2 53573 06/08/2007 07109/2007 ACL Sample #: 255925 Units: IJg/L Analyte Result PQL 1,2-Dibromo-3-chloropropane BQl 0.20 1,2-Dibromoethane BQl 0.05 I Sample 10: Miscellaneous Organics (8011) - Appendix II GWA*2/MW-2 Matrix: Water Date Sampled: 06/05/2007 Date Extracted: 06/11/2007 Date Analyzed: 06/28/2007 Analyst: MA Page 4 of 18

ADVANCED CHEMISTRY LABS, INC. IACLI Phone: (770) 4~09~-~144~4-------------~3"'O""39""A"'m-w-i"'le-r"""'Ro-a-d-.'"S-ul....te-1...0....0-.-AU-a-n-ta-,.... GA~3-03..6...0-Fax: (770) 409-1844 P.O. Box 88610* AUanta, GA 30356 e-mail: acl@acl-Iabs.nel www.advancedchemislrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACL Project #: Date Received: Date Reported: Vogtle LF #2 53573 06/08/2007 07/09/2007 Appendix I Metals (60108/7841/7041) Sample ID: GWA-2/MW-2 Ma~rix: Date Sampled: Date Extracted: Date Analyzed: ACL Sample #: 255925 Units: mg/L Analyst: Analyte Antimony Arsenic Sarium Seryllium Cadmium C

.~

..*.. Chromium pobalt '.. 'Copper lead Nickel Selenium Silver Thallium Vanadium Zinc Result SQl SQl 0.029 SQl SQl SQl SQl SQl SQl 0.022 SQl SQl SQl SQl 0.084 PQL 0.006 0.010 0.020 0.004 0.005 0.020 0.050 0.020 0.010 0.020 0.040 0.010 0.002 0.050 0.020 Water 06/05/2007 06/12/2007 SW Page 5 of 18

IACLI ADVANCED CHEMISTRY LABS, INC. Phone: (770) 4~0':"9-~1~44~4:----------------3~0~3~9~A~m-w~il~e-r~R-oa-d~.~s~u~it-e~1~00~.-A~t~la-n~ta-.~G~A-3~0~3~6~0-Fax: (770) 409-1844 P.O. Box 88610. Atlanta. GA 30356 e-mail: acl@acl-Iabs.net www.advancedchemistrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACl Project #: Date Received: Date Reported: Vogtle LF #2 53573 06/08/2007 07/09/2007 v.o. (50308/82608) - Appendix I Sample 10: GWC-3/MW-3 Matrix: Water Date Sampled: 06/05/2007 Date Extracted: Date Analyzed: 06/14/2007 ACl Sample #: 255926 Units: ~g/L Analyst: ME Analyte Result PQl Analvte Result Pgl m & p-Xylenes BOl 10 Methylene chloride BOl 5 Acetone BOL 100 Styrene BOl 5 Acrylonitrile BOl 50 1,1,1,2-Tetrachloroethane BOl 5 Benzene BOl 5 1,1,2,2-Tetrachloroethane BOl 5 Bromochloromethane BOl 5 Tetrachloroethene BOl 5 Bromodichloromethane BOl 5 Toluene BOl 5 romoform BOl 5 1,1,1-Trichloroethane BOl 5 Carbon disulfide BOl 5 1,1,2-Trichloroethane BOl 5 Carbon tetrachloride BOl 5 Trichloroethene BOl 5 Chlorobenzene BOl 5 Trichlorofluoromethane BOl 5 Chloroethane BOl 10 1,2,3-Trichloropropane BOl 5 Chloroform BOl 5 Vinyl acetate BOl 50 1,2-Dibromo-3-chloropropane BOl 20 Vinyl chloride BOl 2 Dibromochloromethane BOl 5 o-Xylene BOl 5 1,2-Dibromoethane BOl 5 trans-1,4-Dichloro-2-butene BOl 10 1,2-Dichlorobenzene BOl 5 1,4-Dichlorobenzene BOl 5 1,1-Dichloroethane Sal 5 1,2-Dichloroethane BOl 5 1,1-Dichloroethene Sal 5 cis-1,2-Dichloroethene Sal 5 trans-1,2-Dichloroethene Sal 5 1,2-Dichloropropane Sal 5 cis-1,3-Dichloropropene BOl 5 trans-1,3-Dichloropropene Sal 5 Ethylbenzene Sal 5 2-Hexanone Sal 50 Methyl bromide Sal 10 Methyl chloride Sal 10 ethyl ethyl ketone BOl 100 ethyl iodide BOl 5 4-Methyl-2-pentanone BOl 50 Methylene bromide Sal 5 Page 6 of 18

Phone: (770) 409-1444 Fax: (770) 409-1844 e-mail: acl@acl-Iabs.net ADVANCED CHEMISTRY LABS, INC. 3039 Amwller Road* Suite 100

  • Atlanta. GA 30360 P.O. Box 88610* Atlanta. GA 30356 www.advancedchemlstrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACl Project #: Date Received: Date Reported: Vogtle IF #2 53573 06/08/2007 07109/2007 ACl Sample #: 255926 Units: IJg/L Analyte Result PQl 1,2-0ibromo-3-chloropropane Sal 0.20 1,2-0ibromoethane Sal 0.05 Sample 10: Miscellaneous Organics (8011) - Appendix II GWC-3/MW-3 Matrix: Water Date Sampled: 06/05/2007 Date Extracted: 06/11/2007 Date Analyzed: 06/28/2007 An~lyst: MA Page 7 of 18

Phone: (770) 409-1444 Fax: (770) 409-1844 e-mail: acl@acl-Iabs.net ADVANCED CHEMISTRY LABS, INC. 3039 Amwiler Road

  • Suite 100
  • AUanta. GA 30360 P.O. Box 88610* AUanta. GA 30356 www.advancedchemistrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACl Project #: Date Received: Date Reported: Vogtle LF#2 53573 06/08/2007 07/09/2007 Appendix I Metals (60108/7841/7041) 06/1212007 SW Water 06/05/2007 GWC-3/MW-3 Matrix: Date Sampled: Date Extracted: Dat~ Analyzed: Analyst: Sample 10: ACL Sample #: 255926 Units: mg/L Analvte Result PQl Antimony SOL 0.006 Arsenic SOL 0.010 Barium 0.020 0.020 Beryllium BOl 0.004 Cadmium SOL 0.005 Chromium BOl 0.020 obalt SOL 0.050 Copper BOl 0.020 lead BOl 0.010 Nickel Sal 0.020 Selenium Sal 0.040 Silver BOl 0.010 Thallium Sal 0.002 Vanadium BOl 0.050 Zinc 0.248 0.020 Page 8 of 18

ADVANCED CHEMISTRY LABS, INC. IACLI Phone: (770) 4~0~9-"":'1~44~4~--------------3'!"'0~3"'9~A-m-w"":'il~e-r ~Ro-a-d'!"'.~S!!""u"!"'ite~1"""'00!!"".-A~tl~a-n~ta-."'G"'A-3~0"'3"""'60"'- Fax: (770) 409-1844 P.O. Box 88610

  • Atlanta. GA 30356 e-mail: acl@acl-Iabs.net www.advancedchemlstrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACl Project #: Date Received: Date Reported: Vogtle LF#2 53573 06/08/2007 07/09/2007 v.o. (50308/82608) - Appendix I Sample 10: GWB-4/MW-4 Matrix: Water Date Sampled: 06/0512007 Date Extracted: Date Analyzed: 06/14/2007 ACl Sample #: 255927 Units: IJg/L Analyst: ME Analyte Result PQl Analyte Result PQl m & p-Xylenes Sal 10 Methylene chloride Sal 5 Acetone Sal 100 Styrene BOl 5 Acrylonitrile BOl 50 1,1,1,2-Tetrachloroethane BOl 5 Benzene BOl 5 1,1,2,2-Tetrachloroethane BOl 5 Bromochloromethane BOl 5 Tetrachloroethene BOl 5 Sromodichloromethane BOl 5 Toluene BOl 5 romoform Sal 5 1,1,1-Trichloroethane BOl 5 Carbon disulfide BOl 5 1,1,2-Trichloroethane BOl 5 Carbon tetrachloride BOl 5 Trichloroethene Sal 5 Chlorobenzene BOl 5 Trichlorofluqromethane Sal 5 Chloroethane BOl 10 1,2,3-Trichloropropane Sal 5 Chloroform Sal 5 Vinyl acetate Sal 50 1,2-Dibromo-3-chloropropane BOl 20 Vinyl chloride Sal 2 Dibromochloromethane BOl 5 o-Xylene Sal 5 1,2-Dibromoethane Sal 5 trans-1,4-Dichloro-2-butene Sal 10 1,2-Dichlorobenzene Sal 5 1A-Dichlorobenzene BOl 5 1,1-Dichloroethane BOl 5 1,2-Dichloroethane Sal 5 1,1-Dichloroethene BOl 5 cis-1,2-Dichloroethene BOl 5 trans-1,2-Dichloroethene BOl 5 1,2-Dichloropropane BOl 5 cis-1,3-Dichloropropene Sal 5 trans-1,3-Dichloropropene Sal 5 Ethylbenzene Sal 5 2-Hexanone BOl 50 Methyl bromide BOl 10 Methyl chloride Sal 10 ~ethyl ethyl ketone Sal 100 I ethyl iodide Sal 5 4-Methyl-2-pentanone BOl 50 Methylene bromide Sal 5 Page 9 of 18

ADVANCED CHEMISTRY LABS, INC. IACLI Phone: (770) 4~09~-~144~4--------------:3~0~39~A':""m-w~i~le-r~R-oa-d:-.~S:-ul:"!"'*te-1~0~0-* ~At~la-n~ta-,":G":"A-:3~0~36~0~ Fax: (770) 409-1844 P.O. Box 88610* Atlanta, GA 30356 e-mail: acl@acl-Iabs.net www.advancedchemistrylabs.com Miscellaneous Organics (8011) - Appendix II ACl Sample #: 255927 Units: jJg/L Analyte Result PQl 1,2-Dibromo-3-chloropropane Sal 0.20 1,2-Dibromoethane Sal 0.05 Sample 10: Vogtle LF #2 53573 06/08/2007 07/09/2007 Client Proj #: ' ACL Project #: Date Received: Date Reported: GWB-4/MW-4 Matrix: Water Date Sampled: 06/05/2007 Date Extracted: 06/11/2007 Date Analyzed: 06/28/2007 Analyst: MA The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client:

Contact:

Page 10 of 18

ADVANCED CHEMISTRY LABS, INC. IACLI Phone: (770) 4~09~-~144~4--------------3"'0""'39""A""m-w-I""le-r"'R-oa-d""*""S-u.... ite-1~0...0-*....A.... Ua-n-ta-......G....A....3...0....36.....0-Fax: (770) 409-1844 P.O. Box 88610

  • Atlanta. GA 30356 e-mail: acl@acl-Iabs.net www.advancedchemlstrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACL Project #: Date Received: Date Reported: Vogtle LF#2 53573 06/08/2007 07/09/2007 Appendix I Metals (6010B/71J41/7041) ACL Sample #: 255927 Units: mg/L Analyte Result PQL Antimony Sal 0.006 Arsenic Sal 0.010 Sarium Sal 0.020 Seryllium Sal 0.004 Cadmium Sal 0.005 Chromium Sal 0.020

'
obalt Sal 0.050 Copper Sal 0.020 lead Sal 0.010 Nickel 0.023 0.020 Selenium Sal 0.040 Silver Sal 0.010 Thallium Sal 0.002 Vanadium Sal 0.050 Zinc 0.259 0.020 Sample 10:

GWB-4/MW-4 Matrix: Date Sampled: Date Extracted: Date Analyzed: Analyst: Water 06/05/2007 06/1212007 SW Page 11 of 18

IACL I~~ A_D_VAN_C_'E",!!""!1)~CH,""""!!E~M~1S~1:~'R",!,,,!!,Y~LAB~S~,~IM~C,,!!,,!,,. Phone: (770) 409-1444 3039 Amwiler Road, Suite 100, Atlanta, GA 30360 Fax: (770) 409-1844 P. O. Box 88610, Atlanta, GA 30356 e-mail: acl@acl-Iabs.net QUALITY CONTROL SECTION Page 12 of 18

IACL I ADVANCED CHEMISTRYLAB8,INC. Phone: (770) 4~09~-~14~44~------------~3~03~9!""'A!""'m-w~i1!""'er~R~o-a""!"d-*S~u~it-e~10~O!""'.~A~t1a-n~ta-.~G~A~3~O~36~0-Fax: (770) 409*1844 P.O. Box 88610* Atlanta. GA 30356 e-mail: acl@acl-Iabs.net www.advancedchemlstrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACL Project #: Date Received: Date Reported: Vogtle LF #2 53573 06/08/2007 07/09/2007 V.O. (50308/82608) -Appendix I SURROGATE PERCENT RECOVERY

SUMMARY

Water DibromofJuoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene (77-137) (72-138) (84-122) (77-125) ACLSample# 255925 86 94 99 83 255926 87 95 96 83 255927 89 94 99 82

    • Matrix Interference DO=Diluted Out Page 13 of 18

IA CLI ADVANCED CHEMISTRY LABS, INC. Phone: (770) 4:-:0=9-~1~444":"":'"--------------~30:-=3~9~A~m-w~i':""le-r~R-oa-d":""*~S::-u~ite~1~0~0-* A":"'tl~a-n"":"ta-.~G~A-3~0~3~6~0-Fax: (770) 409*1844 P.O. Box 88610* Atlanta, GA 30356 e-mail: acl@acl*labs.net www.advancedchemistrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACl Project #: Date Received: Date Reported: Vogtle LF #2 53573 06/08/2007 07109/2007 v.o. (5030B/8260B) - Appendix I Sample 10: Matrix: Water Date Sampled: Date Extracted: Date Analyzed: 06/14/2007 ACl Sample #: Blank Units: ~g/L Analyst: ME Analvte Result PQl Analyte Result PQl Acetone Sal 100 Styrene Sal 5 Acrylonitrile Sal 50 1,1,1,2-Tetrachloroethane sal 5 Senzene sal 5 1,1,2,2-Tetrachloroethane Sal 5 Sromochloromethane sal 5 Tetrachloroethene sal 5 Sromodichloromethane sal 5 Toluene Sal 5 Sromoform sal 5 1,1,1-Trichloroethane sal 5 ",arbon disulfide Sal 5 1,1,2-Trichloroethane Sal 5 Carbon tetrachloride Sal 5 Trichloroethene sal 5 Chlorobenzene sal 5 Trichlorofluoromethane sal 5 Chloroethane sal 10 1,2,3-Trichloropropane sal 5 Chloroform Sal 5 Vinyl acetate Sal 50 1,2-Dibromo-3-chloropropane sal 20 Vinyl chloride Sal 2 Dibromochloromethane sal 5 m,p-Xylene sal 10 1,2-Dibromoethane sal 5 o-Xylene sal 5 trans-1,4-Dichloro-2-butene sal 10 1,2-Dichlorobenzene sal 5 1,4-Dichlorobenzene sal 5 1,1-Dichloroethane sal 5 1.2-Dichloroethane sal 5 1,1-Dichloroethene sal 5 cis-1,2-Dichloroethene sal 5 trans-1,2-Dichloroethene sal 5 1,2-Dichloropropane sal 5 cis-1,3-Dichloropropene sal 5 trans-1,3-Dichloropropene sal 5 Ethylbenzene sal 5 2-Hexanone sal 50 Methyl bromide Sal 10 Methyl chloride Sal 10 Methyl ethyl ketone Sal 100 ,~~ethyl iodide Sal 5 \\-I4-Methyl-2-pentanone sal 50 Methylene bromide Sal 5 Methylene chloride Sal 5 Page 14 of 16

ADVANCED CHEMISTRY LABS, INC. GC/MS UNIT # 3 WATER VOLATILE MATRIX SPIKE/MATRIX SPIKE DUPLICATE RECOVERY Analysis Date: 06-14-07 Sample ID: 255916-1 SPIKE SAMPLE MS MS ac. ADDED CONCENTRATION CONCENTRATION 0/0 LIMITS COMPOUND (lJg/L) (lJg/L) (lJglL) REC REC. 1.1-dichloroethene 20.0 0.0 22.5 113 (54-144) benzene 20.0 0.0 21.2 106 (82-132) trichloroethene 20.0 0.0 20.4 102 (73-128) toluene 20.0 0.0 20.9 105 (83-130) chlorobenzene 20.0 0.0 22.4 112 (82-123) SPIKE MSD MSD ADDED CONCENTRATION QC LIMITS COMPOUND (IJg/L) (lJg/L) REC RPD RPD REC. 1,1-dichloroethene 20.0 21.3 107 5 14 (54-144) benzene 20.0 21.1 105 1 14 (82-132) trichloroethene 20.0 20.9 105 3 14 (73-128) toluene 20.0 20.9 105 0 13 (83-130) chlorobenzene 20.0 22.3 112 0 13 (82-123)

  1. Column to be used to flag recovery and RPD values with an asterisk Values outside of QC limits RPD:

0 out of 5 outside limits Spike Recovery: 0 out of 10 outside limits Comments: Page 15 of 16

ADVANCED CHEMISTRY LABS, INC. IACLI Phone: (770) 4~09=--~14~4~4-------------~3~0~39~A':"'m-w~i::-le-r~R-oa-d:-.-:S:-u~ite-1~0~0-."":'A~t1a-n":"'ta-,":G~A~3~0~36~0~ Fax: (770) 409-1844 P.O. Box 88610. Atlanta, GA 30356 e-mail: acl@acl-Iabs.net www.advancedchemistrylabs.com Client:

Contact:

The Dextra Group 1205 Johnson Ferry Rd. Suite 136-446 Marietta, GA 30068-0000 Mr. Kurt Batsel Client Proj #: ACL Project #: Date Received: Date Reported: Vogtle LF #2 53573 06/08/2007 07/09/2007 Appendix I Metals (60108/7841/7041) Sample ID: ACL Sample #: Blank Units: mg/L Analvte Result PQL Antimony Sal 0.006 Arsenic Sal 0.010 Sarium Sal 0.020 Seryllium Sal 0.004 Cadmium Sal 0.005 Chromium Sal 0.020 I'obalt Sal 0.050 Copper BOl 0.020 lead Sal 0.010 Nickel Sal 0.020 Selenium Sal 0.040 Silver Sal 0.010 Thallium Sal 0.002 Vanadium Sal 0.050 Zinc BOl 0.020 Matrix: Date Sampled: Date Extracted: Date Analyzed: Analyst: Water 06/12/2007 SW Page 16 of 18

SPIKE SAMPLE MS MS MSD MSD Added Result Cone. Ree. Cone. Ree. QC Limits ANALYTE (mg/L) (mg/L) (mg/L) (%) (mg/L) (%) RPD RPD %Recovery Antimony 0.200 0.000 0.206 103 0.197 99 4 20 70 130 Arsenic 0.200 0.000 0.206 103 0.200 100 3 20 75 125 Barium 1.000 0.000 1.060 106 1.023 102 4 20 75 125 Beryllium 0.200 0.000 0.227 114 0.220 110 3 20 75 125 Cadmium 0.050 0.000 0.053 107 0.052 103 3 20 75 125 Chromium 0.200 0.000 0.222 111 0.215 107 3 20 75 125 Cobalt 0.200 0.000 0.222 111 0.215 107 3 20 75 125 Copper 0.200 0.000 0.217 108 0.210 105 3 20 75 125 Lead 0.200 0.000 0.217 108 0.210 105 3 20 75 125 Nickel 0.200 0.023 0.241 109 0.233 105 4 20 75 125 Selenium 0.050 0.000 0.048 95 0.047 94 1 20 75 125 Silver 0.020 0.000 0.020 102 0.019 97 6 20 75 125 Thallium 0.200 0.000 0.204 102 0.201 100 2 20 70 130 Vanadium 0.500 0.000 0.541 108 0.522 104 4 20 75 125 Zinc 0.200 0.259 0.464 102 0.460 101 2 20 75 125 ACL Sample No. : Date Analyzed : Analyst:

  • Outside QC Limits Comment:

ADVANCED CHEMISTRY LABS, INC. Appendix I Metals (60108"841"041) Water Matrix Spike/Spike Duplicate Recoveries 255927 06-12-07 sw Page 17 of 18

"'tJ III co CD.... (X)a.... (X) IACLI ADVANCED CHEMlfiTRY LABS, INC. 3039 Amwiler Road* Suite 100* Atlanta, GA 30360. P. 0, Box 88610* Atlanta, GA 30356. (770) 409-1444* Fax (770) 409-1844 ~;en~Gw~ Phone #: -0S7B ~l9tt~ CHAIN-OF CUSTODY RECORD Fax#: l)~ZI-t3=3Ll-5 AND ANALYSIS REQUEST I£g~~~~s:~5t'. 1~-4#Jite Location: a .wIt ) Q.A.. G:6 '&..Lr~ Co. A, Project Manager: Client Project: (#) t--tl2.. ~rzJ ~at5e-1 (Name) \\/~ l-F#-Z \\f'; I attest that the proper field sampling Sampler Name (Print): f~ procedures were used during the '~le ( ~ collection of these samples. ~~I../ ~ t:Q....) £omrne ~ Matrix Method Sampling HH D Field Preserved ~ Sample l;; ~~ l: 'iii U 10 c 0 0 fr1 01 ~ l;; ~ Q) Q) 0 't:J <tl<t C,.) 't:J C3 l: 1;i E ~ '0 ~ ~ e s z ~ 0 til (ij a.. 0 I I J: ~ z 5 0 F Remarks GtV\\lf\\-2. M.V'J-Z-IS Y 1.. \\ I~ ') )( Iy 't. ~\\l'Jt-3, 'M,vJ-3 ~ '/.. 2 \\ ')/ 1. )jr')(,)( ~wB-41 ~1N ; ~ 1-l 'l Z )1) )( d .A ,/I, " C. 'I.. '7 I

v I...,

rvrv .1 ~"WaL-llJOt~ L::t V'lV' Special Detection Limits Remarks: TAT Special Handling Priority (24 hr) D ACL Contact Rush (48 hr) D Quote # Rush (72 hr) D Special Reporting ReqUirements Lab Use Only: Cooler Temp, Normal Jd ~,O 53J"13 3-QAlQC Level FaxD ~ ACL Project #: °C Level 1D Level 2 D Other D IRelinquished by samPler';/)'/!! ~ g~ ~;;; I J /()rge Rq1ved by: CUSTODY Relinquished by : lime '1' RECORD I /I .A Relinquished by : h/lIO~, i,?t~ Receive~~~,1..#-.-. Waybill # A

ApPENDIX C - STATISTICAL ANALYSES

Concentrations (mg/L) Parameter: Barium Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL Total Samples: 48 Total Non-Detect: 22 Percent Non-Detects: 45.8333% Total Background Samples: 13 There is 1 background well Well Samples ND Date Result Original GWA-2/MW-2 13 8 (61.5385%) 7/30/2002 0.027 0.027 9/24/2002 ND<0.01 ND<0.02 10/21/2002 ND<0.01 ND<0.02 12/4/2002 0.015 0.015 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02 6/14/2005 0.021 0.021 12/6/2005 ND<0.01 ND<0.02 6/6/2006 ND<0.01 ND<0.02 12/5/2006 0.054 0.054 6/5/2007 0.029 0.029 There are 3 compliance wells Well Samples ND Date Result Original GWB-4/MW-4 13 5 (38.4615%) 7/30/2002 0.021 0.021 9/24/2002 0.021 0.021 10/21/2002 0.021 0.021 12/4/2002 - 0.0205 0.0205 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 0.021 0.021 6/14/2005 0.042 0.042 12/6/2005 0.021 0.021 6/6/2006 ND<0.01 ND<0.02 12/5/2006 0.023 0.023 6/5/2007 ND<0.01 ND<0.02 GWC-11/MW-1112 4 (33.3333%) 7/30/2002 0.085 0.085 9/24/2002 0.02 0.02 10/21/2002 0.025 0.025 12/4/2002 0.018 0.018 6/25/2003 ND<0.01 ND<0.02 12/17/2003 0.022 0.022 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02. 6/14/2005 0.034 0.034 12/6/2005 ND<0.01 ND<0.02 6/6/2006 0.032 0.032 12/5/2006 0.065 0.065 Page 1

GWC-3/MW-3 10 5 (50%) 7/30/2002 ND<0.01 ND<0.02 9/24/2002 ND<0.01 ND<0.02 12/4/2002 0.02 0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 0.02 0.02 6/14/2005 ND<0.01 ND<0.02 12/6/2005 0.025 0.025 6/6/2006 ND<0.01 ND<0.02 12/5/2006 0.02 0.02 6/5/2007 0.02 0.02 There is 1 unused well Well Samples NO Date Result Original M = ~ H ~ ~ ~ "*=~~.c_"."'_,"____***_.,,<,_,,",=_=v.__ ~, _. _. __ w'.***.*,****~"_'"~_,_._*,;,_;~. __ ***_._~_._._.._.*___ *~~..~"*_M_.=. ______.......,....,._-_._.._". EQ-Blank 4 4 (100%) 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<O.02 12/28/2004 ND<0.01 ND<0.02 Page 2

Shapiro-Wilks Test of Normality Parameter: Barium All Wells Normality Test of Parameter Concentrations Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL K =24; Samples =48 x(n-1 +1 )-x(i)a(n-i+1) i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 x(i) 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.015 0.018 0.02 0.02 0.02 0.02 0.02 0.0205 0.021 0.021 0.021 0.021 0.021 0.021 0.022 0.023 0.025 0.025 0.027 0.029 0.032 0.034 0.042 0.054 x(n-i+1 ) 0.085 0.065 0.054 0.042 0.034 0.032 0.029 0.027 0.025 0.025 0.023 0.022 0.021 0.021 0.021 0.021 0.021 0.021 0.0205 0.02 0.02 0.02 0.02 0.02 0.018 0.015 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.075 0.055 0.044 0.032 0.024 0.022 0.019 0.017 0.015 0.015 0.013 0.012 0.011 0.011 0.011 0.011 0.011 0.011 0.0105 0.01 0.01 0.01 0.005 0.002 -0.002 -0.005 -0.01 -0.01 -0.01 -0.0105 -0.011 -0.011 -0.011 -0.011 -0.011 -0.011 -0.012 -0.013 -0.015 -0.015 -0.017 -0.019 -0.022 -0.024 -0.032 -0.044 Page 3 0.3789 0.2604 0.2281 0.2045 0.1855 0.1693 0.1551 0.1423 0.1306 0.1197 0.1095 0.0998 0.0906 0.0817 0.0731 0.0648 0.0568 0.0489 0.0411 0.0335 0.0259 0.0185 0.0111 0.0037 b(i) 0.0284175 0.014322 0.0100364 0.006544 0.004452 0.0037246 0.0029469 0.0024191 0.001959 0.0017955 0.0014235 0.0011976 0.0009966 0.0008987 0.0008041 0.0007128 0.0006248 0.0005379 0.00043155 0.000335 0.000259 0.000185 5.55e-005 7.4e-006

47 48 0.065 0.085 0.01 0.01 -0.055 -0.075 Sum of b values = 0.0850864 Sample Standard Deviation = 0.0150588 W Statistic = 0.679267 5% Critical value of 0.947 exceeds 0.679267 Evidence of non-normality at 95% level of significance 1% Critical value of 0.929 exceeds 0.679267 Evidence of non-normality at 99% level of significance Page 4

Kruskal-Wallis Non-Parametric Test Parameter: Barium Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL Kruskal Wallis Ranks Background Wells Background Rank Sum = 275 Background Rank Mean = 21.1538 WelllD Date GWA-2/MW-2 7/30/2002 9/24/2002 10/21/2002 12/4/2002 6/25/2003 12/17/2003 6/16/2004 12/28/2004 6/14/2005 12/6/2005 6/6/2006 12/5/2006 6/5/2007 Rank Sum = 275 Rank Mean = 21.1538 Compliance Wells WelllD Date GWB-4/MW-4 7/30/2002 9/24/2002 10/21/2002 12/4/2002 - 6/25/2003 12/17/2003 6/16/2004 12/28/2004 6/14/2005 12/6/2005 6/6/2006 12/5/2006 6/5/2007 Rank Sum = 340.5 Rank Mean = 26.1923 GWC-11/MW-117/30/2002 9/24/2002 10/21/2002 12/4/2002 6/25/2003 12/17/2003 6/16/2004 Result 0.027 ND<0.01 ND<0.01 0.015 . ND<0.01 ND<0.01 ND<0.01 ND<0.01 0.021 ND<0.01 ND<0.01 0.054 0.029 Result 0.021 0.021 0.021 0.0205 ND<0.01 ND<0.01 ND<0.01 0.021 0.042 0.021 ND<0.01 0.023 ND<0.01 0.085 0.02 0.025 0.018 ND<0.01 0.022 ND<0.01 Rank 41 11.5 11.5 23 11.5 11.5 11.5 11.5 31 11.5 11.5 46 42 Rank 32 33 34 30 11.5 11.5 11.5 35 45 36 11.5 38 11.5 48 25 39 24 11.5 37 11.5 PageS

12/28/2004 ND<0.01 11.5 6/14/2005 0.034 44 12/6/2005 ND<0.01 11.5 6/6/2006 0.032 43 12/5/2006 0.065 47 Rank Sum = 353 Rank Mean = 29.4167 GWC-3/MW-3 7/30/2002 ND<0.01 11.5 9/24/2002 ND<0.01 11.5 12/4/2002 0.02 26 12/17/2003 ND<0.01 11.5 6/16/2004 0.02 27 6/14/2005 ND<0.01 11.5 12/6/2005 0.025 40 6/6/2006 ND<0.01 11.5 12/5/2006 0.02 28 6/5/2007 0.02 29 Rank Sum = 207.5 Rank Mean = 20.75 Calculation Results: Kruskal-Wallis H Statistic = 3.13009 Kruskal-Wallis H Statistic (adjusted for tied non-detects) = 3.46296 95% Confidence comparison value is 7.81472 at 3 degrees of freedom 3.13009 < 7.81472 indicating no significant group difference at 5% significance level 3.46296 < 7.81472 indicating no significant group difference at 5% significance level when adjusted for ties Page 6

Concentrations (mg/L) Parameter: Nickel Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL Total Samples: 48 Total Non-Detect: 43 Percent Non-Detects: 89.5833% Total Background Samples: 13 There is 1 background well Well Samples NO Date Result Original GWA-2/MW-2 13 11 (84.6154%) 7/30/2002 ND<0.01 ND<0.02 9/24/2002 ND<0.01 ND<0.02 10/21/2002 ND<0.01 ND<0.02 12/4/2002 ND<0.02 ND<0.04 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02 6/14/2005 ND<0.01 ND<0.02 12/6/2005 ND<0.01 ND<0.02 6/6/2006 ND<0.01 ND<0.02 12/5/2006 0.022 0.022 6/5/2007 0.022 0.022 There are 3 compliance wells Well Samples NO Date Result Original GWB-4/MW-4 13 11 (84.6154%) 7/30/2002 ND<0.01 ND<0.02* 9/24/2002 ND<0.01 ND<0.02 10/21/2002 ND<0.01 ND<0.02 12/4/2002 - ND<0.02 ND<0.04 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02 6/14/2005 ND<0.01 ND<0.02 12/6/2005 ND<0.01 ND<0.02 6/6/2006 ND<0.01 ND<0.02 12/5/2006 0.029 0.029 6/5/2007 0.023 0.023 GWC-11/MW-1112 11 (91.6667%) 7/30/2002 ND<0.01 ND<0.02 9/24/2002 ND<0.01 ND<0.02 10/21/2002 ND<0.01 ND<0.02 12/4/2002 ND<0.02 ND<0.04 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02 6/14/2005 ND<0.01 ND<0.02 12/6/2005 ND<0.01 ND<0.02 6/6/2006 ND<0.01 ND<0.02 12/5/2006 0023 0.023 Page 7

GWC-3/MW-3 10 There is 1 unused well 10 (100%) 7/30/2002 9/24/2002 12/4/2002 12/17/2003 611612004 6/14/2005 12/6/2005 61612006 1215/2006 61512007 ND<0.01 ND<0.01 ND<0.02 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.02 ND<0.02 ND<0.04 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 ND<0.02 Well EO-Blank Samples 4 ND 4 (100%) Date 6/25/2003 12/17/2003 611612004 12/28/2004 Page 8 Result ND<0.01 ND<0.01 ND<0.01 ND<0.01 Original ND<0.02 ND<0.02 ND<0.02 ND<0.02

Shapiro-Wilks Test of Normality Parameter: Nickel All Wells Normality Test of Parameter Concentrations Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL K =24; Samples =48 i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 x(i) 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.02 0.022 0.022 0.023 x(n-i+1 ) 0.029 0.023 0.023 0.022 0.022 0.02 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 x(n-1 +1 )-x(i)a(n-i+1) 0.019 0.3789 0.013 0.2604 0.013 0.2281 0.012 0.2045 0.012 0.1855 0.01 0.1693 0.01 0.1551 0.01 0.1423 0.01 0.1306 o 0.1197 o 0.1095 o 0.0998 o 0.0906 o 0.0817 o 0.0731 o 0.0648 o 0.0568 o 0.0489 o 0.0411 o 0.0335 o 0.0259 o 0.0185 o 0.0111 o 0.0037 o o o o o o o o o o o o o o o -0.01 -0.01 -0.01 -0.01 -0.012 -0.012 -0.013 Page 9 b(i) 0.0071991 0.0033852 0.0029653 0.002454 0.002226 0.001693 0.001551 0.001423 0.001306 o o o o o o o o o o o o o o o

47 48 0.023 0.029 0.01 0.01 -0.013 -0.019 Sum of b values = 0.0242026 Sample Standard Deviation = 0.00492384 W Statistic = 0.514065 5% Critical value of 0.947 exceeds 0.514065 Evidence of non-normality at 95% level of significance 1% Critical value of 0.929 exceeds 0.514065 Evidence of non-normality at 99% level of significance Page 10

Kruskal-Wallis Non-Parametric Test Parameter: Nickel Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL Kruskal Wallis Ranks Background Wells WelllD Date GWA-2/MW-2 7/3012002 9/24/2002 10/21/2002 12/412002 6125/2003 12/17/2003 611612004 12/28/2004 611412005 12/6/2005 61612006 1215/2006 61512007 Rank Sum =331 Rank Mean = 25.4615 Result ND<0.01 ND<0.01 ND<0.01 ND<0.02 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 0.022 0.022 Rank 22 22 22 22 22 22 22 22 22 22 22 44 45 Background Rank Sum =331 Background Rank Mean =25.4615 Compliance Wells WelllD Date GWB-4/MW-4 7/3012002 9/24/2002 10/21/2002 12/412002 - 6125/2003 12/17/2003 611612004 12/28/2004 611412005 12/6/2005 61612006 1215/2006 61512007 Rank Sum =336 Rank Mean =25.8462 GWC-11/MW-117/30/2002 9/24/2002 10/21/2002 12/412002 6125/2003 12/17/2003 611612004 Result ND<0.01 ND<0.01 ND<0.01 ND<0.02 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 0.029 0.023 ND<0.01 ND<0.01 ND<0.01 ND<0.02 ND<0.01 ND<0.01 ND<0.01 Rank 22 22 22 22 22 22 22 22 22 22 22 48 46 22 22 22 22 22 22 22 Page 11

12/28/2004 ND<0.01 22 6/14/2005 ND<0.01 22 12/6/2005 ND<0.01 22 6/6/2006 ND<0.01 22 12/5/2006 0.023 47 Rank Sum =289 Rank Mean =24.0833 GWC-3/MW-3 7/30/2002 ND<0.01 22 9/24/2002 ND<0.01 22 12/4/2002 ND<0.02 22 12/17/2003 ND<0.01 22 6/16/2004 ND<0.01 22 6/14/2005 ND<0.01 22 12/6/2005 ND<0.01 22 6/6/2006 ND<0.01 22 12/5/2006 ND<0.01 22 6/5/2007 ND<0.01 22 Rank Sum =220 Rank Mean =22 Calculation Results: Kruskal-Wallis H Statistic =0.511022 Kruskal-Wallis H Statistic (adjusted for tied non-detects) =1.81758 95% Confidence comparison value is 7.81472 at 3 degrees of freedom 0.511022 < 7.81472 indicating no significant group difference at 5% significance level 1.81758 < 7.81472 indicating no significant group difference at 5% significance level when adjusted for ties Page 12

Concentrations (mg/L) Parameter: Zinc Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL Total Samples: 48 Total Non-Detect: 28 Percent Non-Detects: 58.3333% Total Background Samples: 13 There is 1 background well Well Samples NO Date Result Original GWA-2/MW-2 13 9 (69.2308%) 7/30/2002 ND<0.01 ND<0.02 9/24/2002 ND<0.01 ND<0.02 10/21/2002 ND<0.01 ND<0.02 12/4/2002 ND<0.01 ND<0.02 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02 6/14/2005 ND<0.01 ND<0.02 12/6/2005 0.08 0.08 6/612006 0.122 0.122 12/5/2006 0.109 0.109 6/5/2007 0.084 0.084 There are 3 compliance wells Well Samples NO Date Result Original GWB-4/MW-4 13 8 (61.5385%) 7/30/2002 ND<0.01 ND<0.02 9/24/2002 ND<0.01 ND<0.02 10/21/2002 ND<0.01 ND<0.02 12/4/2002 - ND<0.01 ND<0.02 6/25/2003 ND<0.01 ND<0.02 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02 6/14/2005 0.029 0.029 12/6/2005 0.082 0.082 6/6/2006 0.128 0.128 12/5/2006 0.073 0.073 6/5/2007 0.259 0.259 GWC-11/MW-1112 6 (50%) 7/30/2002 0.034 0.034 9/24/2002 ND<0.01 ND<0.02 10/21/2002 ND<0.01 ND<0.02 12/4/2002 ND<0.01 ND<0.02 6/25/2003 0.029 0.029 12/17/2003 ND<0.01 ND<0.02 6/16/2004 ND<0.01 ND<0.02 12/28/2004 ND<0.01 ND<0.02 6/14/2005 0.025 0.025 12/6/2005 0.181 0.181 6/6/2006 0.034 0.034 12/5/2006 0.056 0.056 Page 13

GWC-3/MW-3 10 There is 1 unused well 5 (50%) 7/3012002 9/24/2002 12/4/2002 12/17/2003 611612004 6/14/2005 12/6/2005 61612006 1215/2006 61512007 ND<0.01 ND<0.01 0.047 ND<0.01 ND<0.01 ND<0.01 0.137 0.077 0.174 0.248 ND<0.02 ND<0.02 0.047 ND<0.02 ND<0.02 ND<0.02 0.137 0.077 0.174 0.248 Well Samples ND Date Result Original EQ-Blank 4 4 (100%) 6/25/2003 12/17/2003 611612004 12/28/2004 Page 14 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.02 ND<0.02 ND<0.02 ND<0.02

Shapiro-Wilks Test of Normality Parameter: Zinc All Wells Normality Test of Parameter Concentrations Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL K = 24; Samples = 48 x(n-1 +1 )-x(i)a(n-i+1) i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 x(i) 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.025 0.029 0.029 0.034 0.034 0.047 0.056 0.073 0.077 0.08 0.082 0.084 0.109 0.122 0.128 0.137 0.174 0.181 x(n-i+1) 0.259 0.248 0.181 0.174 0.137 0.128 0.122 0.109 0.084 0.082 0.08 0.077 0.073 0.056 0.047 0.034 0.034 0.029 0.029 0.025 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.249 0.238 0.171 0.164 0.127 0.118 0.112 0.099 0.074 0.072 0.07 0.067 0.063 0.046 0.037 0.024 0.024. 0.019 0.019 0.015 o o o o o o o o -0.015 -0.019 -0.019 -0.024 -0.024 -0.037 -0.046 -0.063 -0.067 -0.07 -0.072 -0.074 -0.099 -0.112 -0.118 -0.127 -0.164 -0.171 Page 15 0.3789 0.2604 0.2281 0.2045 0.1855 0.1693 0.1551 0.1423 0.1306 0.1197 0.1095 0.0998 0.0906 0.0817 0.0731 0.0648 0.0568 0.0489 0.0411 0.0335 0.0259 0.0185 0.0111 0.0037 b(i) 0.0943461 0.0619752 0.0390051 0.033538 0.0235585 0.0199774 0.0173712 0.0140877 0.0096644 0.0086184 0.007665 0.0066866 0.0057078 0.0037582 0.0027047 0.0015552 0.0013632 0.0009291 0.0007809 0.0005025 o o o o

47 48 0.248 0.259 0.01 0.01 -0.238 -0.249 Sum of b values = 0.353795 Sample Standard Deviation = 0.0633599 W Statistic = 0.663402 5% Critical value of 0.947 exceeds 0.663402 Evidence of non-normality at 95% level of significance 1% Critical value of 0.929 exceeds 0.663402 Evidence of non-normality at 99% level of significance Page 16

Kruskal-Wallis Non-Parametric Test Parameter: Zinc Original Data (Not Transformed) Non-Detects Replaced with 1/2 DL Kruskal Wallis Ranks Background Wells Background Rank Sum =291.5 Background Rank Mean = 22.4231 WelllD Date GWA-2/MW-2 7/30/2002 9/24/2002 10/21/2002 12/4/2002 6/25/2003 12/17/2003 6/16/2004 12/28/2004 6/14/2005 12/6/2005 6/6/2006 12/5/2006 6/5/2007 Rank Sum = 291.5 Rank Mean =22.4231 Compliance Wells WelllD Date GWB-4/MW-4 7/30/2002 9/24/2002 10/21/2002 12/4/2002 - 6/25/2003 12/17/2003 6/16/2004 12/28/2004 6/14/2005 12/6/2005 6/6/2006 12/5/2006 6/5/2007 Rank Sum =312 Rank Mean =24 GWC-11/MW-117/30/2002 9/24/2002 10/21/2002 12/4/2002 6/25/2003 12/17/2003 6/16/2004 Result ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 0.08 0.122 0.109 0.084 Result ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 ND<0.01 0.029 0.082 0.128 0.073 0.259 0.034 ND<0.01 ND<0.01 ND<0.01 0.029 ND<0.01 ND<0.01 Rank 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 38 42 41 40 Rank 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5 30 39 43 36 48 32 14.5 14.5 14.5 31 14.5 14.5 Page 17

12/28/2004 ND<0.01 14.5 6/14/2005 0.025 29 12/6/2005 0.181 46 6/6/2006 0.034 33 12/5/2006 0.056 35 Rank Sum =293 Rank Mean =24.4167 GWC-3/MW-3 7/3012002 ND<0.01 14.5 9/24/2002 ND<0.01 14.5 12/4/2002 0.047 34 12/17/2003 ND<0.01 14.5 6/16/2004 ND<0.01 14.5 6/14/2005 ND<0.01 14.5 12/6/2005 0.137 44 6/6/2006 0.077 37 12/5/2006 0.174 45 6/5/2007 0.248 47 Rank Sum =279.5 Rank Mean =27.95 Calculation Results: Kruskal-Wallis H Statistic = 0.910384 Kruskal-Wallis H Statistic (adjusted for tied non-detects) = 1.13561 95% Confidence comparison value is 7.81472 at 3 degrees of freedom 0.910384 < 7.81472 indicating no significant group difference at 5% significance level 1.13561 < 7.81472 indicating no significant group difference at 5% significance level when adjusted for ties Page 18}}

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