Text

VYNPS, Phase II Site Investigation Report Nov 15, 1999
	ML061730235
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	11/15/1998
From:	; SVE Associates
To:	Tkatch D; NRC Region 1, Vermont Yankee
References
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	Download: ML061730235 (62)
	v • d • e

SVE ASSOCIATES 28 MECHANIC ST.

KEENE, NH 03431 PHONE 603-355-1532 FAX 603-355-2969 sveTO top d.npt V'Y MEVVE O IUS5OVIrw.

DAT WE ARE SENDING YOU 0 Attached 0 Under separate cover via the following Items:

] Shop drawings 0 Copy of letter o Prints 0 Change order o Plans n

0 Samples 0 Specifications COPIES DATE NO.

DESCRIPTION THESE ARE TRANSMITTED-as checked below:

0 For approval

[3 Approved as submitted For your use 0 Approved as noted As requested 0l Returned for corrections For review and comment 0]

FOR BIDS DUE 19

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__corrected prints PRINTS RETURNED AFTER LOAN TO US REMARKS copyPY T.

vv.

° It enclosures are not as noted. kindly notify we ot

SVE Associates Engineering Surveying Landscape Architecture Planning Type of Submittal Petroleum Reimbursement Fund Phase Workscope/Budget

-Initial Response Action

2echnical Report

" Product Reimbursement Request

.Site Investigation Monitoring Result Corrective Action Plan Remedial Design Plan Remedial Implementation/Operations/Monitoring Site Investigation Report VT Yankee Nuclear Power Plant - Vernon, VT (VT DEC Site # 99-2617)

Latitude 42 degrees, 46', 42.7" N Longitude 72 degrees, 43' 26" USGS Brattleboro River Quad Prepared For:

Vermont Yankee Nuclear Power Corp P.O. 157 Vernon, VT 05454-0157

Contact:

David Tkatch (802) 258-5500 Prepared By.

SVE Associates 28 Mechanic St.S$

Keene, NH 03431

Contact:

Steven L. Brackett (603) 355-1532 Nov. 15, 1999 Recommended Risk Category

1. Immediate Human Health Risk

4. Surface Water Impact (Actual

7. Alternate Water Available/Low (Impacted Water Well, etc.)

Impact to Class B or potential Impact to level Groundwater Contamination (<1 000 Class B) x VGES)

2. Potential Human Health Risk (Residential well within 1000' or site

5. No Alternate Water Available/No

8. No VOES Violation/No Source within wellhead area)

Existing Wells in Area Remaining

3. Free Product or Source Hazard

6. Alternate Water Available/High Level Groundwater Contamination V(>I 000_xVO_)

28 Mechanic St.. Keene, NH 03431 Phone: (603) 355-1532 Fax (603) 355-2969 P.O. ~ox 1818, Brattleboro, VT 05302-1818 Phone: (802) 257-0561 Fax (802)257-0721 P.O. Box 1818, Brattleboro, VT 05302-1818 Phone: (802) 257-0561 Fax (802) 257-0721

EXECUTIVE

SUMMARY

During the spring of 1999 an extensive environmental assessment was conducted of the Vermont Yankee Nuclear power plant by McLaren Hart, Inc. on behalf of Amergen 'Inc.,

a potential purchaser of the property. During this investigation two areas of groundwater and soil contamination were documented. Both of these areas were located outside of the turbine building bay doors immediately to the south of the main transformers for the site.

The contaminants encountered were tetrachloroethylene ("PCE') and a suite of #2 fuel oil compounds (naphthalene and BTEX). This contamination was non-radioactive.

Although possible sources of the PCE contamination were discussed to date no conclusive evidence has been found which explains this issue. On the other hand the naphthalene and BTEX contamination are clearly related to a 10,000 gallon #2 fuel oil tank that had formerly been located in this area. This tank was closed in December 1994.

No evidence of contamination was reported at the time-of closure time.

The McLaren Hart, Inc. report, dated May 18, 1999 indicates the presence of PCE, naphthalene and BTEX contamination but did not determine degree and extent of this contamination. Subsequent to the MeLaren Hart, Inc. report SVE Associates was contracted to conduct a Site Investigation of the area, the objective of which was to determine degree and extent of soil and groundwater contamination and to assess the risk posed by this contamination to potential receptors. This report presents the results of this investigation.

CONCLUSIONS:

Based on this work SVE has reached the following

Conclusions:

The release of petroleum from the former 10,000 gallon # 2 fuel oil UST has contaminated the soil in the area in which it was formerly located, and has contaminated groundwater in a near surface overburden aquifer.

During one round of sampling free phase product was encountered in MW-1. Free product recovery was commenced immediately using sorbent pads. Since free product recovery began no additional free product has been encountered The PCE contamination identified in the McLaren Hart, Inc. report was confirmed in the July 16, 1999 round of sampling but was found only in groundwater samples collected from MW-9 during the Oct. 25, 1999 sampling round. In any case, the extent of the PCE contamination is clearly limited to the area investigated and is very low in degree.

3

The onsite drinking water supply is sourced by four onsite drilled bedrock wells.

VOC's, in concentrations exceeding drinking water standards, have not been found in any of the wells. Drinking water samples from one of these wells (the "COB" well - located approximately 750' downgradient from the former UST location), has been found to contain VOC's in concentrations below drinking water standards.

No evidence was found to indicate that the soil and groundwater contamination identified is a threat to any receptors.

In light of these Conclusions, SAE has the following Reconmnendations:

Quarterly groundwater monitoring should begin in Dec. 1999 and should consist of the following:

Measurement of groundwater depths and collection of groundwater samples from MW-l, MW-2, MW-3, MW-5, MW-6, MW-7, MW-8, and MW-9. (In the opinion of SVE MW-4 can be excluded from monitoring due to its distance, on gradient, from the contaminant plume).

Each groundwater sample should be analyzed for the presence of PCE, BTEX, and naphthalene according to EPA Method 8021B.

After each sampling round a summary report should be prepared which describes the results of the monitoring. This report will include the groundwater analysis for the round as compared to historical trends, a groundwater contour map, and recommendations for future monitoring.

SVE anticipates that the frequency of monitoring will decrease in the future as the impact of seasonal changes in groundwater elevation fluctuations on groundwater quality are better understood.

SITE HISTORY The site is currently owned by the Vermont Yankee Nuclear Power Corp.and has been since 1964. Prior to that the site was in agricultural uses.

SITE ABUTTERS OWNERSHIP INFORMATION A copy of Tax Map 36 for the Town of Vernon, VT is included in the Exhibits. This map shows the abutters of the Vermont Yankee site as well as the location of potential receptors. All of the abutting lots are served by 0nsite water and sewer systems. However, in the opinion of SVE Associates, none of these are potential receptors. The only potential receptors (as discussed below) are the adjacent building. However, for completeness the onsite water supply wells for the Vermont Yankee site are also shown.

Hazardous Materials Use, Storage and Disposal Practices Construction of the Vermont Yankee nuclear power plant began in 1966 and the site has been occupied by this facility, and this use since that time to the present.

Prior to construction of the Vermont Yankee nuclear power plant the site had been in agricultural use.

Known Hazardous Materials Releases Due to the complex and extensive nature of the site's use as an electrical generating facility there have been a variety of recorded hazardous materials uses at the site. The VT ANR, Sites Management Section Spills list, as well as VT Yankee records were reviewed to try to identify a source for the PCE contamination discussed in this report.

To date none of the recorded releases can be identified as the PCE source.

MAPS A tax map which shows the location of the source and the locations of any potential receptors is contained in the Appendix.

USGS Map - see Appendix Site Plan - see Appendix 6

MONITORING WELLS Monitoring Well Installation Procedure Soil Boring Installation - Soil borings were installed by Soils Engineering using an Acker soil boring rig and 4.5" hollow stem augers.

Monitoring Well Construction-Monitoring wells were constructed by installing 2" Sch.

40 PVC machine slotted screen and solid riser, in appropriate lengths into 4.5" soil borings. The annulus was filled with sorted filter sand to a depth of between.5' and 1' above the top of the screen. A bentonite seal of I' thick was placed on top of the filter sand, and then the balance of the annulus was filled with native soils. A locking cap was installed in the top of the 2" PVC riser and an 8" aluminum road box was installed flush with the ground surface.

SAMPLING PROCEDURES Soil Sampling - Soil samples were collected at intervals of no greater than five feet.

Samples were collected at changes in lithology, at the water table and from any portion of the core which seemed to be stained. Samples were collected using a 2' diameter, 24' long split spoon sampler.

Field Screenin2-Field screening of soil samples for VOC's was conducted using a Gastech OVM Model 1314 calibrated to 400 ppm hexane. The OVM was calibrated on the day of use, both before and after field screening was conducted. Soil samples were placed in wide mouth glass jars, the mouths of which were then covered with aluminum foil. The sample jars were warmed to a consistent temperature as close to 70 degrees F as possible. The concentration of VOC's in the jar's headspace was then determined by inserting the probe of the Gastech© OVM through the aluminum foil membrane.

FIELD SCREENING RESULTS Sample #

Sample Description Field Screening Result (ppm) 5-1 10-12', brown fine sand 0

5-2 15'- 17', brown medium sand 0

5-3 20'-22 ', brown medium sand 0

5-4 25'-27', brown medium sand 0

6-1 10-12', brown fine gravel 0

6-2 15'- 17', brown medium sand 0

6-3 20'-22 ', brown medium sand 85 6-4 25'-27', brown medium sand 23 7-1 10-12', brown fine sand 0

7-2 15'- 17', brown medium sand 0

7-3 20'-22 ', brown medium sand 26 7-4 25'-27', brown medium sand 7

8-1 10-12', brown fine sand 0

8-2 15'- 17', brown gravelly medium sand 34 8-3 20'-22 ', brown gravelly medium sand 98 8-4 25'-27', grey gravelly fine sand 32 9-1 10-12', brown fine sand 0

9-2 15'- 17', brown medium sand 0

9-3 20'-22 ', brown medium sand 80 9-4 25'-27', grey gravelly fine sand 75 GEOLOGY The soil types encountered in the five new monitoring wells installed for this project are described in the Table above. These soils are consistent with what is referred to as Unit A in the McLaren Hart, Inc. report.

Bedrock Type - Bedrock was encountered in MW-2 at a depth of approximately 47' below ground surface. Bedrock below the Vermont Yankee site consist of the Vernon Dome granitic gneiss..

GROUNDWATER SAMPLING

- Groundwater Sampling - All monitoring wells were developed, and water samples collected using 2" diameter single check valve disposal bailers.

- Groundwater Gauging - Groundwater elevation was measured from the ground surface using a Roctest© Water Elevation Meter. The meter has a probe attached to the end of a measured cable. The probe was lowered into the well and at the point that the probe reached groundwater an electric circuit was closed and a high frequency tone was emitted from the meter at the surface. The cable was marked in.01' increments.

Groundwater depth readings were taken on July 17 and Oct. 25, 1999 and are presented in the Table below. The groundwater contour map presented in the appendices of this report is based on these readings.

-7

Well GW GW Elevation Elevation Elelvation below Top below of Casing datum Oct. 25, 1999 MW-5 18.54 MW-6 18.53 MW-7 18.83 MW-8 118.41 1

MW-9 118.57 1-INTERPRETATION OF LABORATORY RESULTS The groundwater analytical results for the July 1999 and October 1999 round of groundwater monitoring are contained in the table below.

bciencI toluene ethylben xylene tetrachlo naphthal Alkyl -

zene roethane wne benzenc 7/26/99 MW-1

< 10

<10 70 50

<10 980 920 MW-2

<1

<1 17

<5

<10 MW-3 MW-4 10/25/99 benzene toluene ethylben xyicne tetrmchlo naphthal Alkyl -

zone roethane ere benzene MW-5

<1

<I

<2

<5

<1 MW-6

<10

<10 20

<10

<10 460 210 MW-7

<10

<10 30 40

< 10 560 310 MW-8

<10

<10 50 20

<10 500 220 MW-9

<1

< 1

<1 16

<5

<1 The compounds that are present in the groundwater of the site, and their relative propoqions, are consistent with fuel oil contamination.

PLUME DEFINITION Extent of Plume - The groundwater contamination at the site is concentrated in the area of the former UST. The contaminant plume is shown on the contaminant isopleth map.

Migration Pathways - As discussed above the soils at this site consist of fine to medium, sands and gravels. The migration pathways at the site are the interstitial pore spaces in these soils. Since the soils are relatively homogenous it can be assumed that migration is relatively constant throughout each soil interval.

Potential for Natural Attenuation - In the opinion of SVE this site has characteristics which will positively influence the rate of natural attenuation.

The site's gravelly soils discourage adsorption and appear to have a moderate to high hydraulic conductivity. This in combination with the hydraulic gradient results in a moderate groundwater velocity in the area. Physical characteristics such as low soil adsorption and moderate groundwater velocity enhance the rate of natural attenuation.

FREE PRODUCT Free product was encountered in MW-1 during the July round of groundwater sampling.

Free product recovery was commenced immediately using sorbent pads in MW-I. Since installing the sorbent pads no free product has been encountered. Although it is possible that all free product was removed quickly by the sorbent pads it is also probable that presence of free product is a function of the water table at the site, which has increased since July.

HYDROGEOLOGY Depth to GW GW Flow Hydraulic Estimated K Direction Gradient 19' east 2%

10"3 fecm Utility corridors are not likely to influence contaminant migration at this site since these are at depths of no greater than 8' (based on a recent GPR survey) and the depth to groundwater is approximately 19'.

CONTAMINANT FATE AND TRANSPORT Rate of Migration A seepage rate of 4.93 fl/day has been calculated as follows:

hydraulic conductivity = I x 10-3 ft/sec porosity = 35%

hydraulic gradient = 2%

RECEPTORS Yes No Notes Wellhead Protection Areas X

Drinking water wells X

surface waters X

buildings with basements X

wetlands X

ecologically sensitive areas X

areas of direct soil contact X

utility corridors X

The area of contamination is directly adjacent to the footings for the turbine building of the VT Yankee Nuclear power plant. Although a portion of the turbine building does have a basement, the portion of the building adjacent to the area of contamination does not.

This portion of the building is of "slab on grade" construction.

A visual inspection was conducted of the basement walls is that portion of the basement closest to the area of contamination (approximately 60' on-gradient). The walls were clearly without any open cracks or holes. VT Yankee staff indicated that a very serious effort is taken to be sure that there are no open cracks or holes in any of the walls of the plant, for fire safety purposes.

CONCLUSIONS

- The release of petroleum from one, or more, of the former UST's has contaminated the soil in the area in which the UST's were formerly located, and has contaminated groundwater in a near surface overburden aquifer.

PCE has been released into the site groundwater in the area of investigation. The McLaren Hart report suggests that this contamination may have been the result of drum storage in the impacted area. The level of PCE found is very low (just above drinking water standards). The pattern of PCE contamination in the site groundwater had not been consistent. It is the opinion of SVE that PCE levels in various wells must change seasonally with groundwater level changes. Quarterly groundwater monitoring will be necessary to fully understand the extent of PCE contamination of.

site groundwater The onsite drinking water supply is sourced by four onsite drilled bedrock wells.

VOC's, in concentrations exceeding drinking water standards, have not been found in any of the wells. As indicted in the McLaren Hart report, VOC's have been detected in water samples from the COB well which is located approximately 750' down-gradient from the former source and contaminant plume. VOC's were present in IC

detectable quantities in a water sample collected from the site's bathroom tap on May 5, 1999 but were below drinking water standards. This level of contamination has been present in water samples from the COB well for a number of years; VT Yankee is complying with VT ANR -Water Supply Division's request that the COB well be monitored on a quarterly basis.

RECOMMENDATIONS Quarterly groundwater monitoring should begin in Dec. 1999 and should consist of the following:

Measurement of groundwater depths and collection of groundwater samples from MW-I, MW-2, MW-3, MW-5, MW-6, MW-7, MW-8, and MW-9. (In the opinion of SVE MW-4 can be excluded from monitoring due to its distance, on gradient, from the contaminant plume).

Analysis of each of the groundwater samples for BTEX, MTBE and naphthalene according to EPA Method 8021B.

Preparation of a summary report that describes the results of the monitoring. This report will include the groundwater analysis for the round as compared to historical trends, a groundwater contour map, and recommendations for future monitoring.

SVE anticipates that the frequency of monitoring will decrease in the future as the impact of seasonal changes in groundwater elevation fluctuations on groundwater quality are better understood.

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ALABORATORY REPORT Eastern Analytical, Inc. ID#:

17692 Client: SVE Associates-NH Client Designation: Vermont Yankee Sample ID:

COB MW-i MW-2 Analytical Type:

Sample Sample Sample Matrix:

aqueous aqueous aqueous Date Sampled:

7/16/99 7/16/99 7/16/99 Date Received:

7121/99 7121/99 7/21/99 Units:

pgIl pgJl pg/I Date of Analysis:

7/22/99 7/26/99 7/26/99 Analyst:

VG VG VG Method:

82608 8260B 82608 Dilution Factor 1

10 1

Dichioirodlfluoromethane

<5

< 50 5.

Chloromethane

<2

< 20

<2 Vinyl chloride

< 2

< 20

<2 Bromomethane

< 2

< 20

< 2 Chloroethane

< 5

< 50

< 5 Tdchlorofluorornthane

< 5

< 50

< 5 Diethyl ether

< 5

< 50

< 5 Acetone

<10

<100

<10 1,1-Dichlomethene 2

<10

<1 Methylene chloride

< 5

<50

<5 Carbon disulfide

< 5

< 20

< 5 Methyl-t-butyl ether(MTBE)

<10.

<10

<10 trans-i,2-Dichloroethene

< 2

<10

< 2 1.1-Dichloroethane

< 2

<10

<2 2,2-Dichloropropane

< 2

<10

<2 cis-1.,2Dichloroethene

< 2

<10

< 2 2.Butanone(MEK)

<10

<100

<10 Bromochloromethane

< 2

<10

<2 Tetrahydrofuran('THF)

<10

<100

<10 Chloroform

<2

<10

< 2 1.1.1-Trichloroethane

< 2

<10

< 2 Carbon tetrachloride

< 2

<10

< 2 1.1-Dlchlompropene

< 2

<10

<2 Benzene

< 1

<10

< 1 1,2-Dichloroethane

< 2

<10

< 2 Trichloroethene

< 2

<10

< 2 1,2-Dichloroprpane

< 2

<10

< 2 Dibromomethane

< 2

<10

< 2 Bromodichloromethane

< 2

<10

< 2 4-Methyl-2-pentanone(MIBK)

< 10

< 100

<10 cis-1,3-Dlchloropropene

< 2

<10

< 2 Toluene

< 1

<10

< 1 trans-l.3-Dichlompropene

< 2

<10

< 2 1,1.2-Trichloroethane

< 2

<10

< 2 2-Hexanone

<10

< 100

<10 Tetrachloroethene

< 2

<10 17

',3-Dichloropmpane

< 2

<.10

< 2 Dibromochloromethane

<2

< 10

< 2 1,2-Dibrornoethane

<2

-c 20

< 2

_hlorobenzene

<2

<10

< 2

AI LABORATORY REPORT Eastern Analytical, Inc. ID#:

17692 Client: SVE Associates-NH Client Designation: Vermont Yankee Sample ID:

COB MW-1 MW-2 Analytical Type:

Sample Sample Sample Matrix:

aqueous aqueous aqueous Date Sampled:

7116/99 7/16/99 7/16/99 Date Received:

7/21199 7/21/99 7/21/99 Units:

pg/l pg/l pg/l Date of Analysis:

7/22/99 7/26/99 7/26199 Analyst:

VG VG VG Method:

8260B 8260B 8260B Dilution Factor:

1 10 1

1,1,1,2-Tetrachloroethane

< 2

<10

<2 Ethylbenzene

< 1 70

<1 mp-Xylene

< 1 50 1

o-Xylene

< 1

<10

<1 Styrene

< 1

<10

<1 Bromoform

< 2

< 20

<2 iso-Propylbenzene

< 1 30

< 1 Bmmobenzene

< 2

<10

<2 1,1,2,2-Tetrachloroethane

< 2

<10

< 2

',2,3-Tdchloropropane

< 2

<10

< 2

.i.Propylbenzene

< 1 50

<1 2-Chlorotoluene

< 2

<10

< 2 4-Chlorotoluene

< 2

<10

< 2 1,3,5-Trimethylbenzene

<1 210

<1 tert-Butylbenzene

< 1

<10

<1 1,2.4-Trimethylbenzene

<1 500

<1 sec-Butylbenzene

< 1 20

<1 1,3-Dichlorobenzene

<1

<10

< 1 p-iisopropyltoluene

<1 60

<1 1,4-Dichlarobenzene.

< 1

<10

<1 1,2.Dichlorobenzene

< 1

<10

< 1 n-Butylbenzene

< 1 50

<1 1,2-Dibromo-3-chloropropane

< 2

<20

<2 1.2,4-Tdchlorobenzene

<1

<10

<1 Hexachlorobutadlene

<1

< 10

< 1 Naphthalene

< 5 980

< 5 1,2,3-Trichlorobenzene

< I

< 10.

<1 01

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LABORATORY REPORT Eastern Analytical, Inc. ID#:

18865 Client: SVE Associates-NH Client Designation:

Vermont Yankee Sample ID:

VY 4.5 VY 4.6 VY 4.7 VY 4.8 VY 4.9 Analytical Type:

Sample Sample Sample Sample Sample Matrix:

aqueous aqueous aqueous aqueous aqueous Date Sampled:

10/25/99 10/25/99 10/25/99 10/25/99 10/25/99 Date Received:

10/27/99 10/27/99 10/27199 10/27/99 10/27/99 Units:

lg/1 pg/i pg pg/i pg/i Date of Analysis:

11/5/99 11/5/99 11/5/99 11/5/99 11/5/99

Analyst, JDS JDS JDS JDS JDS Method:

8260B 8260B 8260B 82608 8260B Dilution Factor:

1 10 10 10 1

Dichlorodifluoromethane

< 5

<50

<.50

< 50

< 5 Chloromethane

< 2

< 20

< 2 Vinyl chloride

< 2

< 20

< 2 Bromomethane

< 2

< 20

< 2 Chloroethane

< 5

< 50

< 5 Tdchlorofluoromethane

< 5

< 50

< 5 Diethyl ether

< 5

< 50

< 5 Acetone

<10

< 100

<10 1,1-Dichloroethene

< 1

< 10

<10

< 1 Aethylene chloride

< 5

< 50

< 5 Carbon disulfide

< 5

< 20

<20

< 5 Methyl-t-butyl ether(MTBE)

<10

<10 trans-1,2-Dichloroethene

< 2

<10

< 2 1,1-Dichloroethane

< 2

<10

<2 2,2-Dlchloropropane

< 2

<10

<2 cis-1,2-Dichloroethene

< 2

<10

< 2 2-Butanone(MEK)

<10

< 100

<10 Bromochloromethane

< 2

<10

< 10

< 2 Tetrahydrofuran(THF)

<10

< 100

<100

< 100

<10 Chloroform

< 2

<10

< 10

<2 1,1,1.Tdchloroethane

< 2

<10

< 2 Carbon tetrachloride

< 2

<10

< 2 1,1-Dichloropropene

< 2

<10

< 2 Benzene

< 1

<10

< 1 1,2-Dichloroethane

<2

<10

< 2 Trichloroethene

<2

<10

<2 1,2-Dichloropropane

< 2

<10

<2 Dibromomethane

< 2

<10

<'2 Bromodichloromothane

< 2

<10

< 2 4-Methyl-2-pentanone(MIBK)

.< 10

< 100

<100

<10 cis-1,3-Dichlomroropene

< 2

<10

< 2 Toluene

<1

<10

< 1 trans-1,3-Dlchloropropene

< 2

<10

< 2 1,1,2-Tdchloroethane

< 2

<10

< 2 2-Hexanone

<10

< 100

<10 Tetrachloroethene

< 2

<10

<10 6

1.3-Dichloropropane

< 2

<10

<2 Jibromochloromethane

< 2

<10

<2 1,2-Dibromoethane

< 2

< 20

< 2

hlorobenzene

< 2

<10

< 2.

(

LABORATORY REPORT Eastern Analytical, Inc. ID#:

18865 Client: SVE Associates-NH Client Designation:

Vermont Yankee Sample ID:

VY 4.5 VY 4.6 VY 4.7 VY 4.8 VY 4.9 Analytical Type:

Matrix:

Date Sampled:

Date Received:

Units:

Date of Analysis:

Analyst Method:

Dilution Factor.

Sample Sample aqueous aqueous 10/25/99 10/27/99 pg/I 11/5/99 JDS 8260B 1

10/25/99 10/27/99 pgA 11/5/99 JDS 82608 10 Sample aqueous 10/25/99 10/27/99 pg/

11/5/99 JDS 8260B 10 Sample aqueous 10/25/99 10/27/99 pg/

11/5/99 JDS 82608 1

1,1,1.2-Tetrachlromet2hane Ethylbenzene mp-Xyiene O-Xylene Styrene Bromof arm Lso-Propylbenzene Bromobonzene 1,1,2,2-Tetrachioroothane 1,Z3-Thichloropropane

.-Propylbenzone 2-Chiorotoluene 4-Chlorotoluene 1,3,5-Trimethyibenzene tert-Butylbenzene 1,24-Thniethylbenzene sec-Butylbenzene I1,3-Dichlorobenzene p-isopropyttoluene 1.4-Dichlorobenzene 1.2-Dichlorobenzene n-Butylbenzene 1.2-Dibromo-3-chloropropafle 1 24-Trichlorobenzene Hexachlorobutadiene Naphthalene I.2,3-Ttichlorobenzene

<2

<1

<2

<1

<2

<1

<2

<1

<2

<1

<5

<1

<10 20

<10

<20 20

<10

<10 20

<10

<10 40

<10 120

<10

<10 10

<10

< 20

<10

<10 460

<10

<10 30 40

<10

< 20 20

<10

<10 20

<10

<10 80

<10 180

<10

<10 10

<10

<10

<10

< 20

<10

<10 560

<10

<10 50 20

<10

< 20 10

<10

< 10

<10 20

<10

<10 60

<10 130

<10

<10 10

<10

< 20

<10

<10 500

<10

<2

<1

<2

<1

<2

<1

<2

<1

<2

<1

<5

<1 0

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CpP0 (1

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Engineering Inc.

harlestown, NH 03603 ADDRESS BRATTLEBORO. VT LOCATION VERNON, VT PROJ. NO

!*.n Nn 7911.99 SHEET DATE HOLE NO.

UNE & STA.

OFFSET I

CF 1 1017/99 MW-S GROU NDWATERCOSERVATIONS CASING SAMPLER CORE BAR. SURFACE ELEV.

AT 24' AT IMMEDIATELY I-OURS Type HSA SS DATESTARTED 10/7/99 Size 1.0.

4 114 1 1/2' DATECOMPL 1017199 Hammer Wt.

140#

BIT BOPJNGFORMAN M.H. & W.M.

AT AT

_-_U_

S Hammer Fat(

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SAMPLE DEPTHS CIF l'on sampler DENSITY CHANGE Rock-colortype, cond.. hardness. Drilling tme, seams FROM-TO SAMPLE on sampler OR CONSIST.

ELEV. Inore.

NO PmesEm 14 l/2' ASPHALT DENSE BROWN FINE GRAVEL AND CRUSHED STONE 10.-12 SS 4

5 1

24" 6i' 10__

6 5

ED. DENSE dROWN FINE SAND - TRACE OF FINE GRAVEL 15'- 17 SS 7

8 2

24' 9' 15' 7

8 20' 20 - 2 SS 3

2 3

24 20 2

2

- OOSE -WET BROWN MEDIUM TO COARSE SAND 25 - 27' S

4 4

24" 11L 25' 5

5 301 30' SET 2" WELL AT 2r TOP OF WELL AT 1T SAND TO 14*r BENTONITE TO 1 Z7" MATFRIALt USEFD-10' OF'2 PVC o.01(0 SLOT SCREEN. 20' OF 2" PVC SOLID,

50 OF BENTONITE CHIPS. 150# OF SAND. 40# OF CEMENT

-MIX,1 rGRIPPER.1 2"PVCCAP.1 6"CASTIRON MANHOLE. 2 55 GALLON DRUMS W/LIDS GF:XJND SULFACE TO 30'

)-Dry C-Cored W-Washed UP-Unfinished Piston rP-Test Pit A-Auger V-Vane JIT-Undisturbed Thinwali USE) HSA CASING THEN Proportions Used 140 lb. wt. x 30-fall an 2' O.D. Sampler summary trace 0 to 10%

Cohesionless Density Cohensive Consistancy EARTH RING 30' little 10 to 20%

M tense 40-48 So 9

+ H P

RING Tes some 20 to 35%

30-50 Dense 4-8 MIStII and 35 to 50%

50+

Very Dense 8-15 Stiff 15-30 V-StilSLE Ha.ENO. MW-5

M & W Soils Main St.

C TO S.V.E. ASSOCIATES PROJECT NAME VT YANKEE REPORTSENTTo STEVE BRACKETT SAMPLES RETAINED BY S.V.E. ASSOCIATES nl i Engineering Inc.

harlestown, NH 03603 ADDRESS BRATTLEBORO. VT LOCATION VERNON. VT PROJ. NO 7911-99 SHEET DATE HCLE NO.

UNE & STA.

OFFSET 1

CF 1 10/8/99 MW.6 SAMPLES RETAINED BY_

,V___

ASSOCIATES IUR GROUND WATER OBSERVATIONS CASING SAMPLER COREBAR. SURFACEELEV.

AT 20' AT IMMEDIATELY H3URS Type HSA SS DATESTARTED 10/8199 Size I. D.

4 1/4' I

1/2" DATECOMPL 1"0/8/99 Hammer WL 140#

BIT BORING FORMAN M.H. & W.M.

AT AT HOURS Hammer Fall 30" INSPECTOR S. BRACKETT I_

SOILS ENGR.

LOCATION OF BRING AS MARKED. NORTH END OF OIL TANK DFIELD SO-L IDENTIFICATION Depth SAMPLE TYPE Blows per 6~ MISTURE 3TRATA Remarks Include color. gradation. Type of soil etc.

SAMPLE DEPTHS OF DENSITY CHANGE Rock-color, type, cond., hardness. Drilling tIme. seams FROM-TO SAMPLE on sampler OR CONSIST.

ELEV.

NO. PE q

4 1/2' ASPHALT MED. DENSE 2'

1 CRUSHED STONE 5

_DENSE BROWN FINE GRAVELS 1012" SS 8

7 10"-/.

1 24' 15' 10' s

5

__ED. DENSE BROWN FINE TO MEDIUM SANDS 15"- i "

SS 3

2 2

24' 12' 15' 2

4 16'

__ED. DENSE BROWN FINE GRAVELS (FUEL ODOR) 20' 20". 22.

SS 4

3 20' 3

24" 16" 3

2

_DOSETO MED.

BROWN MEDIUM SANDS DENSE -WET 25 - 27' SS 5

5 25' 4

24-121-25' S

6 NO BEDROCK TO DEPTH SET 2" WELL AT 2"6-TOP OF WELL AT 15'6" SAND TO 3I 30'

-BENTONITETO 11" MATeRIALS USEDF 10" OF 2 PVC 0.010r SLOT SCREEN, 15 OF 2 PVC SOLID.

50# OF BENTONITE CHIPS. 250W OF SAND. 400 OF CEMENT MIX.1 2"GRIPPER.1 2"PVCCAP.1 6"CASTIRON

_MANHOLE OUND SURFACETO 27 D-Dry C-Cored W-Washed UP-Unfinished Piston TP-Test Pit A-Auger V-Vane UT-Undisturbed Thinwall Proportions Used trace 0 to 10%

little 10 to 201 Tes some 20 to 35' and 35 to 50, USE HSA CASING THEN 140 lb. wt. x 30%-fal an

" O.D. Sampler summary Cohesionless Density Cohensive Consistancy EARTH BRING 2 7' 0-10 Loosd 0.4 Soft39

÷ Har_

10-30 Med. Dense 4-:

MSotiff 30.50 D e nse

" 8.1 5 S tiff RO M PLE S 4 50+

Very Dense 815 VStiff SAMPLES 4 1-30 V-StIll HEN MW-6

M & W Soils Main St.

C To S.V.E. ASSOCIATES 0ROJECT NAME VTYANKEE

.EPOFIT SENT TO STEVE BRACKETT SAMPLES RETAINED BY S.V.E. ASSOCIATES vr~i r=

Engineering Inc.

harlestown, NH 03603 ADDRESS BRATTLEBORO. VT LOCATION VERNON. VT PROJ. NO.

VIM K 7911.99 SHEET DATE HOLENO.

UNE & STA.

O:FSET 10/8199 MW.7 GROUND WATER OBSERVATIONS CASING SAMPLER CORE BAR SURFACE ELEV.

AT 21, AT 112 HOUIRS Type HSA SS DATESTARTED 10/8199 Size I.D.

4 1/4' 1 1/2" DATECOMPL 10/8199 Hammer Wt.

140#

BIT WRING FORMAN M.H. & W.M.

AT AT HOURS Hammer Fall 30" INSPECTOR S, BRACKETT I_

I SOILS ENGR.

LOCATION OF BORING AS MARKED IN PAVEMENT Depth SAMPLE TYPE Blows per 6 MOISTURE STRATA R

FIELD SOL IDENTIFICATION e SPLES TYp DSITYR TRAT Remarks Include color, gradation. Type of soil etc.

SAMPLE DRMTOOF on Sar DENSITY CHANGE Rock-cor, type. cond.. hardness. Drilling time, seams FFROM-TO SAMPLE osmpler OR CONSIST.

ELEV.

-di f NO. PEN RE mlm1m i_ i DENSE ASPHALT MDDENSE CRILSHF.O STONE 5'3-5 1 FERY D ENSE BROWN FINE.GRAVEL.

10.

10'- 12*

_"S a

7 1 24' 5 "

10' 5

5 LOOSE BROWN MEDIJM SAND t5". 1r SS 2

2 2

2V 19" 1 5,

1 1 2 SAME MATERIAL 20' 20.- 22" SS 5

7 20' 3 124" 21o 7

6 i

M.ED. DENSE BROWN MEDIJM TO COARSE SANDS WVET 25 -27 SS 3

4 4 1420 25' 6 6 "

25"6" NO BEDROCK TO DEPTH SET r WELL AT 25"6" TOP OF WELL AT IS""

30' SAND TO 17 BENTONITE TO 1-ri11 mATrRIALS USED-

-IC OF Z' PVC 0.010" SLOT SCREEN. 15" OF 2" PVC SOLID,

50 OF BENTONITE CHIPS. 250# OF SAND. 400 OF CEMENT MIXI "GRIPPER,1 "PVCCAP.1 6"CASTIRON MANHOLE GRCUNDSUIFACETO 27' Sample Tree D-Dry C-Cored W-Washed UP-Unfinished Piston TP-Test Pit A-Auger V-Vane

'T-Undisturbed Thinwall LSM HSA CASING THEN Proportions Used 140 lb. wt-x 30.-fal an 2" O.D. Sampler umm trace 0 to 10%

" Cohesneu Density I Cohensive Consistancy EARTH WRING 27' little 10 to 20%

0-30 Laos n

0-4 Soft 39

+ H Tes some 20 to 35%

30-50 Dense 48 M/Sti and 35 to 50%

50+

Very Dense 8-15 Stiff SAMPLES 4 115S-30 V-Stiff HLENO. MW-7

M & W Soils Main St.

C TO S.V.E. ASSOCIATES PROJECT NAME VTYANKEE REpORT SENTTO STEVE BRACKETT SAMPLES RETAINED BY S.V.E. ASSOCIATES ir" Engineering Inc.

harlestown, NH 03603 ADDRESS BRATrLEBORO. VT LOCATION VERNON, VT PROJ. NO.

Ifin vlý 7911-99 SHEET DATE HOLE NO.

UNE & STA.

CFFSET I

CF 1 10112/99 MW-8 GROIUND WATER OBSERVATIONS CASING SAMPLER CORE BAR. SURFACE ELEV.

AT 24' AT 1/2 HOIURS Type HSA SS DATESTARTED 10/12/99 Size1. D.

4 114" 1 1D2 DATECOMPL 10/12/99 Hammer WL 140-SIT BORINGFCRMAN M.H. & W.M.

AT AT HOURS Hammer Fall 30" INSPECTOR S. BRACKETT SOILS ENGFL LOCATION OF BORING AS MARKED. ON PAVEMENT Depthl SAMPLE ITYPE Blows pRE TRATA FIELD SOL IDENTIFICATION Bwper 6

STURemarkS include color. gradation, Type of soil etc.

SAMPLE DE:PTHS SF e

DENSITY CHANGE Rock-olor, type. cond.. hardness, Drlling time. seams FROM-TO SAMPLE on samp-OR CONSIST.

ELEV.

___,__NO__

_PEN_

F=C ASPHALT ED. DENSE 2'

CRUSHED STONE ED. DENSE BROWN FINE GRAVEL

".10 12" SS 11 g

1 24" 16 10' 7

.___ED. DENSE BROWN FINE SAND WITH AN OCCASIONAL COBBLE (SLIGHT FUELODOR) 1' 15-I SS 6

6 2

24" o" 6

6 20' 0' - 2 SS 8

7 3

24. 6" 4

4

'ET SAME MATERIAL 24" 25- - 26'6° SS 23 31 (SAMPLE #4. ROCK IN SHOE) 4 18* 0.

25 32

-DENSE GREY GRAVELLY SILTS AND SANDS 28" NO BEDROCK TO DEPTH 30' SET 2 WELL AT 28' TOP OF WELL AT IS*

SAND TO 16' BENTONITE TO 14" MATERIALS USED-10' OF 2 PVC 0.010 SLOT SCREEN. 20" OF 2 PVC SOLID.

50# OF BENTONITE CHIPS. 2508 OF SAND. 40s OF CEMENT MIX.1 2"GRIPPER.1 2PVCCAP.1 S"CASTIRON MA__HOLE GOUNNU SIUFACETO 28" D-Dry C-Cored W-Washes.'

UP-Unfinished Piston TP-Test Pit A-Auger V-Vane UT-Undisturbed Thinwall Proportions Used trace 0 to 10%

little 10 to 201 Tes some 20 to 355 and 35 to 50i USED HSA CASING THEN 140 lb. wL x 30-fall an 2' O.D. Sampler summary Cohesionless Density Cohensive Consistancy EARTH BORING 28' 0-300 Loosse 0-4 Soft 3Q

+ Har M0d50 D

ense 4

M/Stiff FIOCKOORING 50+

Very Dense 8-15 Stiff SAMPLES 4 15-30 V-Stiff HC'ENO. MW-S

M & W Soils Main St.

C TO S.V.E. ASSOCIATES PROJECT NAME VT YANKEE

.:;EpORTSENTTO STEVE BRACKE'T SAMPLES RETAINED BY S.V.E. ASSOCIATES f 1, Engineering Inc.

harlestown, NH 03603 ADDRESS BRATTLEBORO. VT LOCATION VERNON. VT flnP% I tL^

SHEET DATE HOLE NO.

LINE & STA.

CFFSET 10112199 MW-9 1

7911-99 GROUND WATER OBSERVATIONS CASING SAMPLER CORE BAR, SURFACE ELEV.

AT 2S' AT 1/2 HXIcS Type HSA SS DATESTARTED 10112/99 Size I. D.

4 114*

1 1/2" DATE COMPL 10/12199 Hammer WL I4 BIT BORING FORMAN M.H. & W.M.

AT AT HOURS Hammer Fall 30" INSPECTOR S. BRACKETT

___SOILS ENGR.

LOCATION OFBORING AS MARKED, IN PAVEMENT I_

DepthI SAMPLE TYPE Blows per 6 MOISTURE STRATA FIELDSOLIOENTIhCATION DEPTHS CF DENSITY CHANGE Remarks Indude color. gradation. Type of soil etc.

SAMPLE P-T SAMPE DEsamp ONSISTY C E

Rock-color. type, cond.. hardness. Drilling dime. seams FROM-TO JSAMPLE on sampler OR CONSIST.

ELEV.

MiREC 3 i1r ASPHALT MED. DENSE CRUSHED STONE 3.

ED. DENSE BROWN FINE GRAVE.

6.

10" - 12 SS 11 9

MED.DENSE BROWN FINE SAND WITH COBBLES AND BOULDERS 1 24" 22' 15s-17' SS 4

8 2

24 20" 11 13 SAME MATERIAL 20 20"- 22 18 18 20,I-.

3 24" 20" 17 15 DENSE - WET GREY GRAVELLY SILTS AND SANDS WITH COBBLES 24'+1-25' - 27 SS 13 10 4

24** 23 2

g 10 MED. DENSE BROWN FINE SANDS 28" NO BEDROCK TO DEPTH 30' SET r WELL AT 28' TOP OF WELL AT 1"'

SAND TO 15"6" BENTONITE TO 135" MATERIALS USED:

10' OF r PVC 0.010" SLOT SCREEN. 20' OF 2" PVC SOLID.

501 OF BENTONITE CHIPS. 250# OF SAND. 40# OF CEMENT

-MIX 1 2" GRIPPER.1 PVC CAP.1 6° CAST IRON MANOLE GROUND SURFACE TM 28' D-Dry C-Cored W-Washed UP-Unfinished Piston TP-Test Pit A-Auger V-Vane UT-Undisturbed Thinwall Proporýons Used trace 0 to 10%

little 10 to 20%

Tes some 20 to 35/,

and 35 to 501Y LS&D HSA CASING THEN 140 lb. wt x 30"faUl an 2! O.D. Sampler summary Cohesionless Density Cohensive Consistancy EARTH BORING 28' 0.1

ý e°' o° 5-*..

0:4 Soft 39.

+ Harc, = CCRI-N, 0-30

,-,dn,ens.

4-8 M

Ifit H

30-50 50+

Very Dense 8-15 Stiff SAMPLES 4 1

115-30 V-Stiff I

MW-9

Waste Management Division 103 South Main Street / West Building Rc,d Waterbury, Vermont 05671-0404 802-241-3877 Fax 802-241..3296 gerold.noyes@anr.state.vt.us December 13, 1999 DAVID TKATCH VERMONT YANKEE NUCLEAR POWER CORP PO BOX 157 GOVERNOR HUNT ROAD VERNON VERMONT 05354-0157 RE:

Site Investigation Report, Vermont VT Yankee Power Plant, SMS Site #99-2617 Vernon, Vermont

Dear Mr. Tkatch:

The Sites Management Section (SMS) has reviewed the November 15, 1999 SVE Associates report titled, "Site Investigation Report, VT Yankee Nuclear Power Plant, Vernon, Vermont", the SMS site file, and the Water Supply Division records. Based on this review, the SMS has determined the following:

During the Spring 1999 Environmental Site Assessment for a potential property transfer, 4 monitor wells were installed and contaminated soil and groundwater were observed. The probable source was identified as a #2 fuel oil underground storage tank (UST) for an emergency generator. Tetrachloroethene (PCE) and its degradation by-products was also reported at levels below the Vermont Groundwater Enforcement Standard (VGES). Additional investigation was required by the SMS.

Approximately 1" of free product was noted in MW-I in July 1999. This was bailed and product recovery started using sorbent socks. According to a telephone interview with Steve Brackett, free product has not been seen in this well since July. This well is currently monitored every 1-2 weeks by plant personnel.

On October 7, 1999, 5 additional groundwater monitor wells were installed in order to evaluate potential contamination related to the UST. Medium sand and fine gravel were observed from grade to 25' below the ground surface (bgs). Bedrock was not encountered. Petroleum odors and photoionization detector readings up to 98 ppm were noted in soil sampleg from MW-6, -7, -8 and -9.

over

Site #99-2617 December 13, 1999 page 2 of 2 On October 25, MW-5 to -9 were sampled for volatile organic compounds (VOCs) via EPA 8260. No target analytes were detected in MW-5. In MW-6, -7, and -8 contained one or more exceedences of the VGES for petroleum related compounds.

MW-9 contained PCE at 6 gtg/L, which is above the VGES of 5 jgtg/L for this compound.

1,1-Dichlorethane and 1,1-dichloroethene, break down products of PCE have been noted in the Cob supply well on site. The source of these chlorinated solvents has not been identified, but may be related to earlier solvent based cleaning operations.

The levels of these compounds have varied from 1.2 to 2.5 pig/L in quarterly sampling conducted in 1999. These levels are below the VGES.

Based on the information submitted by SVE, the SMS requests that:

1.

All monitor wells should be sampled and analyzed for volatile organic compounds via EPA Method 8260 on a quarterly basis, starting in December 1999. If no contaminants are detected in MW-4, this monitor wells may be dropped from future sample rounds; however the groundwater level should be gauged for inclusion in the groundwater contour map.

2.

Supply well test results from the on site water supply well (currently performed quarterly for the Vermont Water Supply Division) should be included. The locations of all supply wells should be shown on the site map.

3.

Summary reports should be prepared including groundwater levels, groundwater quality data, appropriate groundwater contour and contaminant distribution maps.

I Please have your consultant submit a work plan, timetable, and cost estimate for the above items within fifteen days of your receipt of this letter.

Sincerely, Gerold Noyes, P.E.

Environmental Engineer Sites Management Section CC:

Steven Brackett, SVE Associates D1.WyFile.~aI No,. iwkhVWenmont Ymwka\\Vr YawMO L3.wpd over

Dec 29 99 0 4 : 2 7 p SVE Rssociates 603 35S 2969 p.

2 Dec. 29, 1999 Gerold Noyes VTANR-SMS 103 S. Main St./West Building Waterbury, VT 05671-0404 RE: Groundwater Monitoring - DEC Site # 99-2617; Vermont Yankee Nuclear Power Station

Gerold, In response to the submission by SVE Associates of a Site Investigation of the Vermont Yankee Nuclear Power Station (dated Nov. 15, 1999), the VT ANR.- SMS, in a letter dated Dec. IS, 1999 (copy attached),

requested that a Work Scope, Cost Estimate, and timetable be prepared for quarterly groundwater monitoring of MW-I through MW-9. SMS also requested the submission of the results of drinking water volatile organic compounds analysis for all Vermont Yankee's onsite drinking water wells.

SVE Associates has prepared the following Work Scope to cover the work requested by ANR-SMS, and has included a plan for the recovery of free product from those monitoring wells in which it currently exists. The requested Scope of Work is described below.

SCOPE OF WORK Task 1.0 - Prepare a Scope of Work and Cost Estimate for submission to the VT DEC for approval prior to the commencement of work (completed).

Task 2.0 - Sorbent pads are currently Installed in MW-I and MW-7. Free phase prodcut has been found in each well during prior groundwater monitoring rounds. On a weekly basis, properly trained staff of Vermont Yankee will remove sorbent pads an either squeeze the recovered product form the pad or replace with a new pad. All recovered product and spent pads will be placed in a DOT H17 drum for storage and disposal. The drummed material will disposed of as petroleum contaminated solids according to Federal and State regulations.

The volume of product recovered will be carefully estimated and this infbormation will be recorded.

Task 3.0 - On a quarterly basis (in the months of December, April, July, and September) conduct groundwater monitoring in MW-I through MW-9. MW-4 will be included in the initial December 1999 monitoriug round. If no exceedances of VT State drinking water standards are found in the sample collected from MW-4 in this round then this well will be excluded from future monitoring rounds. The December 1999 round of monitoring will be conducted by staff of SVE Associates. Subsequent rounds of groundwater moniwaring will be conducted by properly trained and qualified staff of Vermont Yankee Nuclear Power or-oratio Groundwater monitoring will include:

measurement of groundwater depths in each well purging of three well volumes of groundwater from each well collection and bottling of groundwater samples from each well analysis of each collected groundwater sample for the presence of VOC's according to EPA Method 8260.

qL

Dec 29 99 04:2 7 p SVE Associates 603 355 2969 p.

3 Task 4.0 - On a quarterly basis, prepare a Summary Report that will contain both the results of that quarter's round Of groundwater monitoring, as well as the results ofthe quarter's free product recovery.

This Summary Report will include a historical sunmnary, including the most recent results, of the volatile organic compounds analyses of drinking water samples from the Vermont Yankee onsite drinking water supplies a description of the field procdu-es used In both groundwater monitoring and in free product recovery the water depths recorded groundwater analytical results a site plan including both the most recent groundwater contours and contaminant distribution a record ofthe volumes or free product recovered and volumes of waste disposed of. In those quarters when petroleum contaminated waste, generated by this project, is removed from the site copies of the associated waste manifests will be included in the report.

Conclusions and Recommendations for any changes in either the free product recovery or the groundwater monitoring plan Best Regards, Steven L. Brackett Geologist

Sheetl PROJECT WORK SCOPE AND BUDGET ESTIMATE T

PROJECT:

Vermont Yankee MAILING ADDRESS:

Vermont Yankee Nutlear Power Station LOCATION:

Vernon P.O. Box 157 DES 9: 199105023 99-2617 Vernon, VT 05354-015"7 DATE OF SUBMITTAL-12CA 9/O99OI TASK CONTRACTOR,_ DESCRIPTION

.NT TYPE RATE.COST ENGO LAB DLL OTHER

.ep o

ork Scope SVE Proj Geologist 4__hur I,$280 S70 S280_S ALL COST SET OUT BELOW ARE FOR ONE YEARS SAMPLING Groundwater Sampling Eastern Analytical 8260 33 sample

$128 S4,224

$4,..4 SVE Project Geologist hours

$70

$420

$420 VT Yankee Technician f

20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months

$50 S1,000 *SI,000 VTrYankee Equiptment 4 day

$35 S

$140

f.

____I____

Project Management SVE

_Principal__

z 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months

$95

$190

$190 SVE iProject Manager 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months

$90 S360

$360 Prepare Summary Report jProject Manager 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months

$90

$360

_Project Geologist 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months

$70

$1,260

$1,260 Draftsman 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months

$50

$400

$400 Clerical 8$ hours

$35

_280

$280 8

o rT3 2 0 Copying Expense

$20 S20 S2o I

S M

tA IA 0

rt (I

W*

En CA) to N

Page I

603 355 2969 p.

2 Sep 10 99 04:16p SVE Associates LABORATORY REPORT Eastern Analytical, Inc. ID#:

17692 Client: SVE Associates. NH Client Designation: Vermont Yankee Sample ID:

COB MW-1 MW-2 Analytical Type:

Sample Sample Sample Matrix:

aqueous aqueous aqueous Date Sampled:

7/16/99 7/16199 7116199 Date Received:

7/21/99 7/21/99 7121/99 Units:

pg/i Pg/I pg/I Date of Analysis:

7/22/99 7/26199 7/26/99 Analyst:

VG VG VG Method:

8260B 8260B 8260B Dilution Factor:

1 10 1

Dichlorodlfluoromethane

<5

< 50

< 5 Chlommothane

< 2

< 20

<2 Vinyl chloride

<2

< 20

<2 BSrmomethane

<2

- 20

< 2 Chloroethane

< 5

< 50

'5 Tdchlorofluoromethane

<5

<50

<5 Diethyl ether

< 5

< 50

< 5 Acetone

<'10

<100

<10 1,1-Dichloroethene 2

<10

,C 1 Methylene chloride 65

< 50

'5 5

Carbon disulfide

<5

< 20

< 5 Methyl-t-butyl ether(MTBE)

<10

<10 trans-1.2-Dlchloroethene

<2

< 10

'2 1.1-Dichloroethane

<2

< 10

< 2 2.2-Dichloropropane

<2

<10

< 2 cis-1.2-Dichloroethene

<2

<10 (2

2-Butanone(MEK)

< 10

<100

<10 Bromochloromethane

<2

<10

< 2 Tetrahydrofuran(THF)

<10

< 100

<10 Chloroform

<2

< 10

' 2 1,1,1-Trichloroethane

< 2

<10

'2 Carbon tetrachloride

< 2

< 10

<2 1.1-Dichloropropene

<2 C 10

<2 Benzene

<1

<10

< 1 1,2-Dichloroethane

< 2

<10

< 2 Trichloroethene

< 2

<10

<2 1,2-Dlchloropropane

< 2

<10

<2 Dibromomethane

< 2

< 10

<2 Bromodlchloromethane

< 2

<10

< 2 4-Methyl.2-pentanone(MIBK)

<10

<100

< 10 cls-1.3-Dichloropropene

<2

<10

< 2 Toluene

<1

<10

< 1 trans-I,3. Dichloropropene

<2

< 10

<2 1.1.2-Trichloroethane

< 2

<10

<2 2-Hexanone

'10

< 100

<10 Totrachloroethene

<2

< 10 17 1,3-Dichloropropano

< 2

< 10

<2 Dlbromochlommelhane

< 2

<10

<2 1,2-Dibromoethane

<2

< 2Q 2

Chlorobenzene

< 2

<10

<2 4~3%

Sep 10 99 04:16p SVE Rssaciates 603 355 2969 p.3 LABORATORY REPORT Eastern Analytical, Inc. ID#:

17692 Client: SVE Associates-NH Client Designation: Vermont Yankee Sample ID:

COB MW-1 MW-2 Analytical Type:

Sample Sample Sample Matrix:

aqueous aqueous aqueous Date Sampled:

7116199 7116199 7116199 Date Received:

7/21199 7/21/99 7121/99 Units:

pg/i lig/I pg/i Date of Analysis:

7/22/99 7/26/99 7126/99 Analyst:

VG VG VG Method:

8260B 82605 8280B Dilution Factor.

1 10 1

1.1.1.2-Tetrachloroethane

< 2

< 10

< 2 Ethylbenzene

< 1 70

< 1 mp-Xylene

< 1 50 1

o-Xylene

< 1

<10

< I Styrene

< 1

<10

< I Bromoform

< 2

< 20

< 2 lso-Propylbenzene C 1 30

< 1 Bromobenzene

< 2

< 10

< 2 1,1,2.2-Telrachloroethane

< 2

<10

< 2 1,2,3-Trichloropmpane

< 2

< 10

< 2 n-Propylbenzene

< 1 50

<1 2-Chloratoluene

< 2 C 10

< 2 4-Chlorotoluene

< 2

< 10

< 2 1,3,5-Trimethylbenzene

< 1 210

< 1 tert-Butylbenzene

< 1

<10

<1 1.2,4-Tdmethytbenzene

<1 500

< 1 sec-Butylbenzene

< 1 20 C I 1,3-Dlchlombenzene

< 1

< 10 C I p-isopropyltoluene

< 1 60

< 1 1.4.Dichlorobenzene

<1

<10

< 1 1.2-Dlchlorobenzene

< 1

<10"

< 1 n-Butylbenzene

< 1 50 C I 1.2-Dibromo-3-chloropmpane

<2

<20

< 2 1.2,4-Tdchtorobenzene

< 1

<10

<1 Hexachlorobutadiene

< 1

< 10

< 1 Naphthalene

< 5 960

< 5 1,2.3-Trlchlorobmnzene

<1

< 10

< 1

eastern analytical, inc.

FA' 245 W

.Iro.maas-sz 17692 CHAIN-OF-CUSTODY RECORhJ SAMPLE SAMPPUNG MATRIX for LD.

DATEI7IME A.Ak 0

0 labw.w VL 4

ueW

mu x

d O

sog.=3.0'

]

Ip fRE"YATWE:H-icI; WMO3: 54W{O; INbWOe PROJECT MANAGER COMPANYq4>l ADDRESS: Z Xcr~e V CITY: N"-C

-SAE-,)zpC a

FAX:

E-MAIL:

PROJECT NAME:.

C CNX P

PROJECT 0 STATE: Q NH O MA 0 ME V OTHER 0 Site hatoricalty contaminated RESULTS NEEDED BY oengerprelrTed date) '

I Gu-bud f* kfwoud me& p-Vpwg) aA/DC Reparting Level Rapo QOpli CIA 08 OC radCp EIlcwonlc:

Quolet_# _

1__

0 OE.Mil P.O. fI I.

(D IL 1*

0, V) 62kJ70jJ c-ok-r W~o Relinquishedbty Rellnquished by (WHITE: Original YELLOW: Lab Files PINK: Project Manager)

Date Time Reived by Date Time Received by

State of Vermont

-2P4.AQ AGENCY OF NATURAL RESOURCES Department of Environmental Conservation Department of Fish and Wi4 Waste Management Division Departennt of Forest. Pasiw and Recreation 103 South Main Street/West OfMice Deparment of Environmenta Conservation Steaft Geoloi Waterbury, Vermont 05671-0404 RELAY SERVICE FOR THE HEARING IMPAIRED (802) 241-3877 14*o-2S3-019i DD ol, FAX (802) 241-3296 1.eo0-2SM19

'Vo~cs34o gerold.noyes@anr.stite.vt.us January 6, 2000 STEVE BRACKETT SVE ASSOCIATES 28 MECHANIC ST KEENE, NEW HAMPSHIRE 03431 RE:

Work Plan Approval, Quarterly Groundwater Monitoring

] W [ [jj-j Vermont Yankee Power Plant, SMS Site # 99-2617 JAN 10 2000 Vernon, Vermont

Dear Mr. Brackett:

By The Sites Management Section (SMS) has received and reviewed the work plan to address petroleum contamination at the above referenced site. The work plan was submitted by SVE Associates and is dated December 29, 1999. The proposed cost is $8,514.

The SMS concurs with the technical elements of the work plan and ipproves its implementation with the following restrictions. Appropriate quality control samples must be taken (duplicate sample and trip blank). It is understood that the first sample round will be performed by SVE Associates technicians and that subsequent rounds will be done by Vermont Yankee personnel. SVE will be responsible to see that Vermont Yankee personnel are properly trained for groundwater monitoring. Training costs, if any, will not be PCF reimbursable. If multi-year monitoring at this site occurs, at least 1 sample round per year must be done by SVE or another qualified environmental contractor.

Because the site has mixed contamination present in the groundwater, which is not due entirely from petroleum underground storage tanks, the lab cost of $128 (EPA Method 8260) per sample will not be PCF reimbursable. Instead the lab costs will be reimbursed at the rate of $60 per sample, which is the maximum allowable rate for EPA Method 8021B. Also according to PCF reimbursement guidelines, the maximum reimbursable rate for technicians is $45 per hour, not $50 as in the w6rk plan.

Therefor the PCF reimbursable cost for this groundwater monitoring will be $6170%.

"$6,170

$8,514 - 33 x ($128-$60) - 20 X ($50- $45)

OvLer Regional Offices - Barre/Essex Jct./Pittsford/Rudand'N. SpringfieidtS" Johnsbury

SMS Site #98-2617 page 2 of 2 January 6, 2000 Please note that reimbursement of the costs associated with this work is subject to:

U A $10,000 deductible per our letter of June 4, 1999; ol stipulations contained in the Sites Investigation Guidance Document dated August 1996; and ol the provisions of the Procedures for Reimbursement from the Petroleum Cleanup Fund date February 1999.

Reports will be due 6 weeks after sampling. Please notify the SMS of the anticipated lVt sample date. if you have any.questions, feel free to call me at (802) 241-3877.

Sincerely, Gerold Noyes Environmental Engineer Sites Management Section CC:

David Tkatch, Vermont Yankee Nuclear Power Corp.

A.I MyPhsa3M~ymoaYwad~r~a~.L*

pd°

State of Vermont AGENCY *OF NATURAL RESOURCES oft Fii ** wDepartment of Environmental Conservation DePatret ofFshadWaste Management Division Departrent of Forests, Pa,1s and Recreation 103 South Main Street I West Building Departmnent of Environment Conservation Waterbury, Vermont 05671-0404 Slate GeologIst 802-21-3877 RELAY SERVICE FOR THE HEARING IMPAIRED 862-241-3877 1-M00-251-0191 TI)OVolca Fax 802-241-3296 1-800-253-019.

Vois ca>TDO geroldLnoyes@anr..state.vt.us February 11, 2000 DAVID TKATCH 1

I~

VERMONT YANKEE NUCLEAR POWER CORP FEB 14 2 00 PO BOX 157 GOVERNOR HUNT ROAD BL_

VERNON VERMONT 05354-0157 RE:..-- Groundwater monitoring, Vermont Yankee Power Plant eMS-Site#9 -2617.

Vernon, Vermont

Dear Mr. Tkatch:

The SMS has reviewed the February 1, 2000 groundwater monitoring report for the above referenced site.

Naphthalene, 1,2,4-and 1,3,5-trimethylbenzene were detected at levels above the Vermont Groundwater Enforcement Standards (VGES) in monitor wells MW-1, -6, -8, and -9. -Monitor well MW-3 and -7 had tetrachloroethene contamination above the VGES.

Four quarters of 1999 water supply testing of the COB supply well were presented. Low levels of 1,1-dichloroethene and 1,1 -dichloroethane were found in the COB water supply pressure tank during all 4 quarters: These compounds were also noted in samples frorntthbt-.floor.1unchr~omoa&d+21l.ofrkitchexr;,"'..'W' for the first and second quarter samples only.

We agree with SVE Associate's recommendation to continue quarterly sampling (next sample date, April 1999).

We noted a number of deficiencies in this report, specifically:

1.

No groundwater level data and contour map were included with this report.

2.

No contaminant distribution map was included with this report.

3.

Although the work plan approval of 1/6/2000 specifically required quality assurance/quality control (QA/QC) samples consisting of 1 trip blank and I duplicate sample, no QA/QC samples were reported.

Over Regional Offices - BarreEssex Jct/Pittsford/Rutdand/N. Springfield/St. Johnsbury

Site #99-2617 February 11, 2000 page 2 of 2

4.

Table 1 does not contain values for 1,2,4-and 1,3,5-trimethylbenzene, both compounds are above their respective VGES. This table should be modified to contain all sample analytes, which 6xceed their respectiye VGES.

5.

i, The sample designation in the lab reports of VY-4.1 to -4.9 is inconsistent with Table I

-designations-ofMW,.l to -9. Using two different numbering methods is confusing, risks mislabeling of lab res its, and makes it very difficult to check lab data sheets with the report Table1. Iftppeas'iat VY-4.2 is in the row for MW-3; is this correct? VY-4.1, -4.6, -4.7, -4.8, and -4.9 correspond to MW-I, -6, -7, -8 and -9 respectively. Tabular results should be presented

.using the same monitor well designations as in the lab data sheets..

Please have SVE Associates correct these report deficiencies and re-submit this report by March 3.

We look forward to reviewing the second quarter'sampling results by May 15, 2000 and SVE Associate's recommendations for future site activity.

Sincerely, Gerold Noyes, P.E.

Environmental Engineer Sites Management Section CC:

Steve Brackett, SVE Associates D-.VyFlIt904it mM. atvWWWMOri YalkuT YVA**LS.WPd

SVE Associates SVE Associates Enginet nng Type of Submh rveying Lfan '

[

Mlnt Fund Phase Planning

_Workscope/Budget 1 Initial Response Action

-Technical Report 1 Free Product

__ Reimbursement Request

__ Initial Site Characterization Monitoring Result (pre-permit)

- Site Investigation

-Monitoring Result (post-permit) 1 Remedial Action Plan Remedial Design Plan Remedial Implementation/Operations/Monitoring Groundwater Management Permit December 1999 Groundwater Monitoring Results Vermont Yankee Nuclear Power Station Vernon, VT (VT DEC Site # 99-2617)

Latitude 42 degrees, 46', 42.7" N Longitude 72 degrees, 43' 26" USGS Brattleboro River Quad Prepared For:

Vermont Yankee Nuclear Power Station P.O. 157 Vernon, VT 05454-0157

Contact:

David Tkatch (802) 258-5500 Prepared By:

SVE Associates Engineering 28 Mechanic St.

Keene, NH 03431

Contact:

Steven L. Brackett Feb. 1, 2000 Recommended Risk Category I. Immediate Human Health Risk

4. Surface Water Impact (Actual

7. Alternate Water Available/Low (Impacted Water Well, etc.)

Impact to Class B or potential Impact to level Groundwater Contamination (<1000 Class B) x AGQS)

2. Potential Human Health Risk (Residential well within 1000' or site

5. No Alternate Water Available/No 8__

.No AGQS Violation/No Source within wellhead area)

Existing Wells in Area Remaining

-- 3. Free Product or Source Hazard

-- 6. Altermate Water Available/High Level Groundwater Contamination

___(>10 xo, AGQS) 28 Mechanic St.. Keene. NH 03431 Phone: (603) 355-1532 Fax (603) 355-2969 P.O. Box 1818, Brattleboro, VT05302-1818 Phone: (802) 257-0561 Fax (802) 257~0721~3 (~

P.O. Box 18 18, Bmttleboro, VT 05302-1818 Phone: (802) 257-0561 F ax. (802) 257-0721ý3 1.

Feb. 1, 2000 Gerold Noyes, Project Manager VT DEC, Sites Management Section 103 South Main St./West Building Waterbury, VT 05671-0404

Gerold, On behalf of our client, SVE Associates is pleased to submit the results of the December 1999 round of Groundwater Monitoring for the Vermont Yankee site (DEC # 99-2617), Vernon, VT.

INTRODUCTION The Vermont Yankee Nuclear Power Station site is located on the Connecticut River in the town of Vernon, VT. The site has been a nuclear powered electrical generating station since the 1960's. In the spring of 1999 monitoring wells were installed in the vicinity of a former underground storage tank as part of a complete environmental assessment of the site.

Groundwater samples from these wells contained VOC's in excess of Vermont Groundwater Enforcement Standards. A Site Investigation was conducted to determine the degree and extent of this contamination. During this investigation 5 additional wells were installed at this site, for a total of 9 wells. Free phase fuel oil was encountered in wells MW-1, MW-8 and MW-9.

The Site Investigation recommended that the appropriate remedial action was passive free product recovery and natural attenuation with quarterly monitoring of ground water.

DECEMBER 1999 GROUNDWATER MONITORING RESULTS On December 16, 1999 staff of SVE Associates conducted groundwater monitoring at the Vermont Yankee Nuclear Power Station site. This consisted of measuring groundwater elevation, purging the wells of three well volumes of groundwater, and collecting groundwater samples.

Groundwater samples were collected from all nine monitoring wells. Each sample was bottled in 40 ml glass VO vials and was sent to Eastern Analytical of Concord, NH for analysis according to EPA Method.8260. A summary of the analytical results is contained in Table I below.

SVE Associates Engineering Surveying Landscape Architecture Planning 28 Mechanic Street, Keene, NH 03431.

Phone (603) 355-1532 Fax (603) 355-2969.

Table I Summary of Groundwater Analytical Data benzene Ethyl-toluene xylene MTBE naphthalene PCE benzene MW-1 5/10/99 ND 27 ND 18 ND ND ND 7/16/99 ND ND ND 120 ND 980 ND 12/29/99 1

39 ND 19 ND 300 ND MW-2S 5/10/99 ND ND ND ND ND ND 3

MW-2D 5/10/99 ND ND ND ND ND ND ND 7/16/99 NS NS NS NS NS NS NS 12/29/99 ND ND ND ND ND ND ND MW-3 5/12/99 ND ND ND ND ND ND 18 7/16/99 ND ND ND 1

ND ND 17 12/29/99 ND ND ND ND ND NI) 22 MW-4 5112/99 ND ND ND ND ND ND ND 7/16/99 NS NS NS NS NS NS NS 12/29/99 ND ND ND ND ND ND ND MW-5 12/29/99 ND ND ND ND ND ND ND MW-6 12/29/99 ND 22 ND 4

ND 200 ND MW-7 12/29/99 ND ND ND ND ND ND 7

MW-8 12/29/99 ND 120 ND 70 ND 320 ND.

MW-9 1

12/29/99 ND 45 ND 40 ND 190 ND

_ I _

_ ~~~~ ~ ~~I_

I_

I

_ I_

SVE Assocates 9I1/3 Engineering Surveying 28 Mechanic Street, Keene, NH 03431 Landscape Architecture Planning Phone (603) 355-1532 Fax (603) 355-2969

Free product recovery is being conducted in MW-1 and MW-8. MW-9 has a sheen but FP recovery is not being conducted due to its proximity to the other more heavily contaminated wells.

CONCLUSIONS AND REOMMENDATIONS Vermont Groundwater Enforcement Standards continue to be exceeded in the groundwater from MW-2, MW-6, MW-8 and MW-9 at the Vermont Yankee Nuclear Power Station site.

The results in MW-2 are similar to the levels seen in the prior rounds of sampling. SVE has no recommendation for a change in the scope of frequency of groundwater monitoring.

The next round of groundwater monitoring will be conducted in April 2000.

SVE Associates I I Engineering Surveying 28 Mechanic Street. Keene, NH 03431 Landscape Architecture Planning Phone (603) 355-1532 Fax (603) 355-2969

Vermont Yankee Nuclear Power Station SMS # 99.2617 Free Product Recovery Efforts

.ýAAIMV Date--04 Volume Recovered CmL) 0711 l.9/1 _.,

InMlled Pad 07/22,199_

45o.

67MI90 450

_1=____

400 n12=2T 09 i__

Pad 12I999t 250

!oV 20190 250 01*MA

1 01/0512000 "0

101220 101/12/2000 01MM 01/19/200M 01119129000, 0112t8r20 M0126/2000 02/01/2000 25 o001..-Moo

. 350 Total -

1400 oo 7 To*

'eoo ML.

a.

..A 2000 rnL MW-1 Free Product Recovery began In July 1999. Reporting requirements not stated until December 29, 1999 letter from G. Noyes MW-8 Fred Product Recovery began In December22, 1999. RepoMttn requirements not stated untU Decnnber 29,1999 letter (fom G. NoyOs I

Zj

'Insufficient Free Product avallable on sorbent pad to estimate a recovery volume.

LABORATORY REPORT Eastern Analytical, Inc. ID#:

19696 Client: SVE Associates-NH Client Designation:

VY Sample ID:

VY 4.1 VY 4.2 VY 4.3 VY 4.4 VY 4.5 VY 4.6 VY 4.7 Analytical Type:

Matrix:

Date Sampled:

Date Received:

Units:

Date of Analysis:

Analyst:

Method:

Dilution Factor:

Sample Sample Sample Sample Sample Sample Sample Dichlorodifluoromethane Chloromethane Vinyl chloride Bromomethane Chloroethane Tdchlorofluoromethane Diethyl ether Acetone 1,1-Dichloroethene Methylene chloride Carbon disulfide Methyl-t-butyl ether(MTBE) trans-1,2-Dichloroethene 1,1 -Dichloroethane 2,2-Dichloropropane cis-l1,2-Dichloroethene 2-Butanone(MEK)

Bromochloromethane Tetrahydrofuran(THF)

Chloroform 1,1.1-Trichloroethane Carbon tetrachloride 1,1-Dichloropropene Benzene 1,2-Dichloroethane Trichloroethene 1.2-Dichioropropane Dibromomethane Bromodichloromethane 4-Methyl-2-pentanone(MIBK) cis-1.3-Dichloropropene Toluene trans-i,3-Dichloropropene 1,1,2-Tdchloroethane 2-Hexanone Tetrachloroethene 1.3-Dichloropropane Dibromochloromethane 1.2-Dibromoethane Chlorobenzene aqueous 12/16/99 12/17/99 pgA 12/29/99 VG 8260B 1

<5

<2

<5

<10

<1

<5

<10

<2

<10

<2

<10

<2

<2 1

<2

<10

<2

<1

<2

<10

<2

<2 aqueous 12/16/99 12/17/99 12/29/99 VG 8260B 1

aqueous 12/16/99 12117/99 pgA 12/29/99 VG 8260B 1

aqueous 12/16/99 12/17/99 pgA 12/29/99 VG 8260B 1

aqueous 12/16/99 12/17/99 pgi 12/29/99 VG 8260B 1

<5

<2

<5

<10

<1

<5

<10

<2

<10

<2

<10

<2

<1

<2

<10

<2

<1

<2

"<10 22

<2

<5

<2

<5

<10

<1

<5

<10

<2

<10

<2

<10

<2

<1

<2

<10

<2

<1

<2

<10

<2

<2 aqueous 12/16/99 12/17/99 pgA 12/29/99 VG 8260B 1

<5

<2

<5

<10

<1

<5

<10

<2

<10

<2

<10

<2

<1

<2

<10

<2

<1

<2

<10

<2

<5

<2

<5

<10

<1

<5

<10

<2

<10

<2

<10

<2

<1

<2

<10

<2

<1

<2

<10

<2

<5

<2

<5

<10

< 10.

<1

<5

<10

<2

<2.

<10

<2

<.2

<10

<2

<.2

<2

<1

<2

<10

<2

<1

<2

<10

<2 7

<2

.<2

<2

<L 2 FAX 603 228-4591 Eastern Analytical, Inc. 2.5*

Chenel Drive. CnckrJ. NH 03 01T www.eailabs.com TEL 603 228-0525 1.800-287-0525

ýAAA i LABORATORY REPORT Eastern Analytical, Inc. ID#:

19696 Client: SVE Associates-NH Client Designation: VY Sample ID:

VY4.1 VY 4.2 VY4.3 VY 4.4 VY 4.5 VY 4.6 VY 4.7 Analytical Type:

Matrix:

Date Sampled:

Date Received:

Units:

Date of Analysis:

Analyst:

Method:

Dilution Factor:

Sample Sample Sample Sample Sample Sample Sample aqueous 12/16/99 12/17/99 aqueous 12116/99 12/17/99 aqueous 12116/99 12/17/99 aqueous 12/16/99 12/17/99 pgA pgA pgA pgA 12/29/99 12/29/99 12/29/99 12/29/99 aqueous 12116/99 12/17/99 pgA 12/29/99 VG 82606 1

aqueous 12/16/99 12/17/99 pgA 12/29/99 VG 8260B 1

aqueous 12/16/99 12/17/99 Pg/l 12129/99 VG 8260B 1

VG 8260B 1

1.1,1,12-Tetrachloroethane Ethylbenzene mp-Xylene o-Xylene Styrene Bromoform iso-Propylbenzene Bromobenzene 1,1,2,2-Tetrachlbroethane 1.2,3-Tdchloropropane n-Propylbenzene 2-Chlorotoluene 4-Chlorotoluene 1,3.5-TrImethylbenzene tertoButylbenzene 1,2,4-Trimethylbenzene sec-Butylbenzene 1,3-Dichlorobenzene p-isopropyltoluene 1.4-Dichlorobenzene 1,2-Dichlorobenzene n-Butylbenzene 1.2-Dibromo-3-chloropropane 1,2,4-Trichlorobenzene Hexachlorobutadiene Naphthalene 1,2,3-Trichlorobenzene

<2 39 19

<1

<2 17

<2

<2 21

<2

<2 94

<1 190 7

<1 20

<1

<1 9

<2

<1

<1 300

<1

<2

<1

<2

<1

<2

<1

<2

<1

<2

<1

<5

<1

<2

<1

<2

<1

<2

<1

<2

<1

<2

<1

<5

<1

<2

<1

<2

<1

<2

<1

<2

<1"

<1

<2

<1

<5

<1

<2

<1

<2

<1

<2

.< 1

<2

<1

<2

<1

"<5

<1

<2 22 4

<1

<2 21

<2

<2 25

<2

<2 38

<1 91 8

<1 7

<1

<1a

<2

<1

<1 200

<1

<2

<1

<2

<1

<2

<1

<2

<1

<2

<1

<5

<1 VY 4.1: Due to an instrument problem specific to naphthalene, the values reported are minimum concentrations. Results should be used with due consideration.

VY 4.6: Due to an instrument problem specific to naphthalene, the values reported are minimum concentrations. Results should be used with due consideration.

Eastern Analytkal, Inc. 25 Chcnelt Drive, (incord.

S1H 2330L www.eailabs.com TEL 603 228-0525 t-SM-287-0525 FAA 603 2284591

LABORATORY REPORT Eastern Analytical, Inc. ID#:

19696 Client: SVE Associates-NH Client Designation:

VY Sample ID:

VY 4.8 VY 4.9 Analytical Type:

Sample Sample Matrix:

aqueous aqueous Date Sampled:

12/16/99 12/16/99 Date Received:

12/17/99 12/17/99 Units:

pg/I pg/I Date of Analysis:

12/29/99 12/29/99 Analyst:

VG VG Method:

8260B 8260B Dilution Factor:

10 1

Dichlorodifluoromethane

< 50

<5 Chloromethane

< 20

<2 Vinyl chloride

< 20

< 2 Bromomethane

< 20

< 2 Chloroethane

< 50

< 5 Trichlorofluoromethane

< 50

< 5 Diethyl ether

< 50

< 5 Acetone

< 100

<10 1,1-Dichloroethene

<10

< 1 Methylene chloride

< 50

<5 Carbon disulfide

< 20

<5 Methyl-t-butyl ether(MTBE)

<10

<10 trans-i,2-Dichloroethene

<10

< 2 1,1-Dichloroethane

<10 4

2,2-Dichloropropane

<10

< 2 cis-1,2-Dichloroethene

<10

<2 2-Butanone(MEK)

< 100

<10 Bromochloromethane

<10

<2 Tetrahydrofuran(THF)

< 100

<10 Chloroform

<10

< 2 1,1,1-Tuichloroothane

<10

<2 Carbon tetrachloride

<10

<2 1,1-Dichloropopene

<10

< 2 Benzene

<10

< 1 1,2-Dichloroethane

<10

< 2 Tricl'oroethene

<10

< 2 1,2-Dichloropropane

<10

.< 2 Dibromomethane

<10

< 2 Bromodichloromethane

<10

< 2 4-Methyl-2-pentanone(MIBK)

< 100

<10 cis-.1,3-Dichloropropene

<-10

<2 Toluene

<10

<1 trans-i,3-Dichloropropene

<10

< 2 1,1,2-Trichloroethane

<10

< 2 2-Hexanone

< 100

<10 Tetrachloroethene

<10

< 2 1,3-Dichloropropane

<10

<2 Dibromochloromethane

<10

< 2 1,2-Dibromoethane

<20

<2 Chlorobenzene

<10

< 2 Eastern Analytical, Inc. 25 C'hencil Driv'e, Cncird. NH T23301 www.eailabs.com TEL 603 228-0525 1.800-287-0525 FAX 603 2284591

LABORATORY REPORT Eastern Analytical, Inc. ID#:

19696 Client: SVE Associates-NH Client Designation: VY Sample ID:

VY 4.8 VY 4.9 Analytical Type:

Sample Sample Matrix:

aqueous aqueous Date Sampled:

12/16/99 12/16/99 Date Received:

12117/99 12/17/99 Units:

pg/I pgil Data of Analysis:

12/29/99 12/29/99 Analyst:

VG VG Method:

8260B 8260B Dilution Factor:

10 1

1,1,1.2-Tetrachloroethane

< 10

<2 Ethylbenzene 120 45 mp-Xylene 70 44 o-Xylene

<10

<1 Styrene

<10

<1 Bromoform

< 20

<2 iso-Propylbenzene 30 18 Bromobenzene

<10

< 2 1,1,2.2-Tetrachloroethane

<10

< 2 1,2,3-Trichioropropane 90

<2 n-Propylbenzene 50 24 2-Chlorotoluene

<10

<2 4-Chlorotoluene

<10

<2 1,3,5-Trimethylbenzene 180 89 tert-Butylbenzene

<10

< 1 1,2,4-Trimethylbenzene 430 200 sec-Butylbenzene 10 7

1,3-Dichlorobenzene

<10

<1 p-isopropyltoluene

<10 19 1,4-Dichlorobenzene

<10

< 1 1,2-Dichlorobenzene

<10

< 1 n-Butylbenzene

<10

.9 1,2-Dibromo-3-chloropropane

< 20

< 2 1,2.4-Tdchlorobenzene

<10

<1 Hexachlorobutadiene

<10

<1 Naphthalene 320 190 1,2,3-Trichlorobenzene

<10

<1 VY 4.8: Due to an instrument problem specific to naphthalene, the values reported are minimum concentrations. Results should be used with due consideration.

VY 4.9: Due to an instrument problem specific to naphthalene, the values reported are minimum concentrations. Results should be used with due consideration.

Eastern Analytical. Inc. :5 Chenell Drive. Concrd. NH 03301 www.eailabs.com TEL 603 228-J525 1-800-287-0525 FAX 603 2284591

._* !2eastern analytical, Inc. 25 ch..

Driv/

Covet NH 03301o1 *L (603) 22.0,525 /.800.25.70525 e a st e r nm a n l mt m

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SAMPLING DATEITIME MATRIX A-Ak 11-114 forn I

lab - atI only 0

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A 0

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I-0 0

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0 FAX:

E.MAIL:

PROJECT AME:______________

PROJECT M STATE: (JNH 6

MA3 ME OTHER___

N"te historically contaminated NOTES: (I.e. Special Detection Umits, Bin 9 Info. if differen()

RESULTS NEEDED BY FOR LAB USE ONLY (entef preferred date):

Adhered to EPA Protocol (GUW*nb~d 1M kmfW nEd pe-fbvs) 3 Yes 0 No f* ah.t

)

OA I QC Reporting Level Reporting Options:

C

)oo No DA IB OC 1 13 Hard Copyn FaxV 0

Electronic:

Ouote 1 l (E.UMalI

( Disk RO. #

Relinquished by Dale hme Receiyed by RelinquIshed by Date Time Received by (WHITE:Odg/hal YELLOW:LabFiles PINK:PrvJect Manager)

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14009 Potable Water VOC Results 4th Quarter 1999 COB COB Parameter 1et Fl Lunchroom Pressure Tk Drain Umit cis-1,3-Ofchloropropene

<0.5

<0.5 tmans-1,3-Dichloropopene

<0.5

<0.5 Ethylbenzene

<0.5

<0.5 700 Hexachlorobutadiene

<0.5 40.5 it*prpoytbenzene

<0.5

<0.5 4-isopropyltoluene

<0.5

<0.5 MTBE

'1.0

<1.0 Napthalene

<1.0

'1.0.

n-Propybenzmene

<0.5

<0.5 Slyrene

<0.5

<0.5 100 1,1,1,2-Tettachloroeftane

<0.5

<0.5 1,1,2.2-Tetrachlorethane

<1.0

<1.0 Tetrachloroelhene

<0.5

<0.5 5

Toluene

<0.5

<0.5 1000 1.2.3-Trichlorobenzene

<0.5 C0.5 I,2,4-Trictlorobenzene

'0.5

<0.5 70 1,1,1-Trichloroethane

<0.5

<0.5 200 1.1,2-Trictloroethane

<0.5

<0.5 5

Trichloroethene

<0.5

<0.5 5

Trichlorofluommethane

<1.0 41.0 1,2,3-Trichlotopropafnl

<0.5

<0.5 1,2,,4-Tdme*Myrbenzerm

<0.5

<0.5 1,3,5-TrlrnIthylbenzene

<0.5

<0.5 Vinyl Chloride

<0.5

'0.5 2

Xylenes. Total

<1.0

-1.0 10000 Bromodichiormethane

<0.5

'0.5 Bromoform

<0.5

<0.5 Chlorotormn c0.5

<0.5 Dibromochloromethane

'0.5

<0.5 Total Tdhalornethanes

<0.5

<0.5 ug/L

O a lb 4

C Ju008 Potable Water VOC Results 4th Quarter 1999 COB COB Parameter 31t Fn Lunchroom Pressure Tk Drain Umit Benzene

'0.5

<0.5 5

Bromobenzene

<0.5

<0.5 Bromochloromethane

<0.5

<0.5 Bromome e

<0.5

<0.5 n-Buty8enzene

<0.5

<0.5 sec-Butylbenuene

<0.5

<0.5 Tert-Butylbenzene

<0.5

<0.5 Carbon Tetrachklide

<0.5

<0.5 5

Chlobenzrene

<0.5

<0.5 100 Chloroethane

<0.5

<0.5 Chloromethane

<0.5

<0.5 4-Chlorotoluene

'0.5

<0.5 2-Chlorotoluene

<0.5

<0.5 Dibromomethane

<1.0

<1.0 1,2-Dichlorobenzene

<0.5

'0.5 600 1,3-Olchlombenzene

<0.5

<0.5 1.4-Dichlorobenzene

<0.5

<0.5 Dichlorodifluoromethae

<0.5

<0.5 1.1-OlCnloroetuan

<0.5 1,2-Dichloroethane

<0.5

'0.5 5

1.1-o010oroe#nen

<0.5 5

cls-1.2-Dchloroethene

<0.5

-0.5 70 trans-1,2-Dihroethene

<0.5

<0.5 100 Dichloromethane

<1.0

<1.0 5

1,2-Dichloropropane

<0.5

<0.5 1.3-Dichloroprpane

<0.5

'0.5 2,2-Dich'oropropane

<0.6

<0.5 1.1-Dictoropropene

<0.5

.<0.5 ugiL AIt 14 I*,q*,,4J t,*t al*

A*

u*

M*

A A

A

Rtruaton ocajrs aown sh*wn oi fl th

.O rruwure enam.

ObnrIOip mat1 pont Of COin~uw~rnij~

Wagb IIJlywOMCI4J.

ý f)

P-IT

-1 L7ý

wJUU7 COB COB COB COB Parameter 1st FI Lunchroom I1 gt Fl Ichen 12nd F Kitchen ]Pressure Tk Drai Unit cisl, 341ciloropropene

<0.5

<0.5 C0.5 trans-1.3-Dichloropopens

<0.5

<0.'5

<0.5 Ethylbenzene

'0.5

<0.5

<0.5 700 Hexachlorobutadiene

<0.5

<0.5 Isoprpoylbenzene

<0.5

<0.6

<0.5 4-1soprmpytoluoene

<0.5

<0.5 MTBE

<1.0

'1.0 Napthelene

<1.0

<1.0 n-Pmpylbenzene

<0.5

'0.5

<0.5

<0.5 Styrene

<0.5

<0.5 100 1.1.1.2-Tetrachloroethane

<0.5

<0.5 1,1,2.2-Tetrachloroethane

<1.0

<1.0 Teirachloroethene

<0.5

'0.5

'0.5 5

Toluene

<0.5

'0.5

<0.5

<0.5 1000 1.2.3-Trichlorobenzene

<0.5

<0.5 1,2,4-Trichlorobenzone

<0.5

<0.5 70 1.1.1-Trichloroethane

<0.5

'0.5 200 1.1,2-Tdchloroelhane

'0.5

<0.5

<0.5 5

Trichlomethene

<0.5

<0.5 5

TrIchlorofluoromethane

<1.0

<1.0 1,2,3-Trichdoropropane

<0.5

'0.5

<0.5 1.2,,4-Tdrmethylbenzene

<0.5

<0.5 1.3.5-Tdmethylbenzene

<0.5

<0.5 Vinyl Chloride

<0.5'

<0.5

<0.5 2

Xyfenms, Total

<1.0

<1.0 10000 rormodichlormethane

<0.5

'0.5 Bromoform

<0.5

'0.5

<0.5

<0.5 Chlomform

<0.5

<0.5 Dibromoctoromethane

<0.5

<0.5 Total Trihalomethanes

<0.5

Ii'*NQUL IM.MlAMl 1006 A

VV-.

U Potable Water VOC Results 3rd Quarter 1999 ugJL COB COB COB COB Parameter lstFILunchroom lstFIKitdien 2ndF1Kidcen PressureTkDrai ULint Benzene

<0.5

<0.5 5

Bromobenzene

<0.5

<0.5 Bromochioromethane

<0.5

<0.5 Bromomethane

<0.5

<0.5 n-Butylbenzene

<0.5

<c0.5

<0.5

<0.5 sec-Butylbenzene

<0.5

<0.5 Tert-Butylbefizene

<0.5

<0.5 Carbon Tetraehloride

<0.5

<0.5 5

Chlorobenzene

<0.5

<0.5 100 Choroethane

<0.5

<0.5 Chloromethane

<0.5

<0.5 C0.5 4-ChIorotoluene

<0.5

<0.5 2-Chlorotoluene

<0.5

<0.5 Dibrornomeftane

<1.0

<1.0 I,2-Dichlorobenzene

<0.5

<0.5 600 1,3-Dichlorobenzene

<0.5

<0.5 1,4-Dichlorobenzene

<0.6

<0.5

<0.5 Dlchlorodlffluoromethane

<0.5

<0.6

<0.5 1.1-Dickwoet~e

<0.5

<0.5 29 1,2-Dichoroethane

<0.5

'.0.5

<0.5

<0.5 5

1.1-Dichloroethene

<0.5

<0.5 5

cis-1.2-Dichioroethene

-:0.5

<0.5

<0.5 70 trans-1,,-Dichloroethene

<0.5

<0.5 100 Dlchloromethane

<1.0

<1.0 5

1.2-Dichoropmopane

<0.5

<00.5

<0.5

<0.5 5

1.3-Dichloropropane

<:0.5

<0.5

<0.5 2,2-Oichloropropane.<0.5

<0.6

<0.5

_1,1-Urchio__rop___

<0.5

<0.5 9}

WSMV46 142 U U ICUUO Parameter list FlLunchroom jlst Ft Kttetn J2nd Fl Kitchen lPrcsur Tk Drain IU~M cls-1.3-Dichloropropene

<0.5

<0.5 trans-1.3-Dichloropropene

<0.5

<0.5 Ethylbenzene

<0.5

<0.5 700 Hexachlorobutadiene 40.5

<0.5

'0.5 lsoprpoylbenzene

<0.5

<0.5 4-1sopropyltoluene

<0.5

'0.5

<0.5 MTBE

<1.0

<1.0 Napthlene 01.0

<1.0

<1.0 n-Propylbenzene

<0.5

<0.5 Styrene

<0.5

<0.5 100 1.1.1.2-Tetrachloroethane

<0.5

<0.5 1.1.2,2-Tetrachloroethane

<1.0 C1.0 01.0 01.0 Tetrachloroethene

<0.5

'0.5

<0.5

<0.5 5

Toluene

<0.5

<0.5 1000 1.2.3-Trichlorobenzene

'0.5

<0.5

'0.5

<0.5 1.2,4-Trichlorobenzene

<0.5

<0.5 C0.5

<0.5 70 1.1,1.TrIchloroethane

<0.5

<0.5 200 1.1,2-Trichloroethane

<0.5

<0.5 5

Trictiloroethene

<0.5

<0.5 5

Trichi*rofluoromethsne

<1.0

<1.0 0.0

<1.0 1.2.3-Trichlompropane

<0.5

<0.5 1,2.,4-Trimethytbenzene

<0.5

<0.5 1.3.5-Trimethylbenzene

<0.5

<0.5 Vinyi Chlortde

'0.5

<0.5

<0.5 2

Xyhenes, Total

<1.0

<1.0 10000 Bromodichlormetharm

<0.5

<0.5 Bromoform

<0.5

<0. 5

<0.5

<0.5 Chlorofo

' <0.6

'0.5

<0.5 C0.5 Dibromochloromethane

<0.5

<0.5 Total Trihatomethanes

<0.5

<0.6

<0.5 J6?

wuu4 Potable Water VOC Results 2nd Quarter 1999 ug(L Cos co coo coo Parameter 1,st F Lunchroom 1st Fl Kitchen 2nd FR Kkdn Pressue T1 Drain LMA Benzene

<0.5

<0.5 5

Bromobenzene

<0.5

<0 5 Bromochloromethane

<0.5

<0.5 Bromomethane

<0.5

<0 5

<0.5

<0.5 n-Butylbenzene

<0.5

<0.5 sec-Butylbenzene

<0.5

<0.6

<0.5 Ten-Bunylbenzene

<0.5

<0.5 Carbon Tetrachlonde

<0.5

<0.5 5

Chlorobenzren

<0.5

<0.5 100 Chlroethane

<0.5

<0.5 Chloromethane 40.5

<0.5

<0.5 4-Chlorotoiuene

<0.5

<0.5 2-Chkomtoluene 40.5

<0.5

<0.5 Dbromometharm

<1.0

-1.0 1,2-Dichlorobenzene

<0.5

<0.5 600 1,3-Dichlorobenzene

<0.5

<05 1.4-Dichlorobenzene

'0.5

<0.5

<0.5 DWAcoroifluornftane

<0.5

<0 5

<0.5

<0.5 1,1-.0chloroethane

<0.5 tw" 1,2-Dichloroethane

<0.5

<0.5 5

1.1-ou,**tne

_<0 5

<0.5 1,1-Dichlonxthene

'05

'0.5 5

c-1-.2-01chloroether,

<0.5

'0.5 70 trans-1,2-DichIoroel ww

<0.5

<0.5 100 Dichloroniothane

'1.0

<1.0 (1.0 41.0 5

1,2-Oichoprýo*a

<0.6

<0.5

<0.5 5

1,3-DichlropropSM 14 0.5

<0.5

<0.5 Z,2-Oichlotopropane

<0.5

<0.5 MLI

W A£U, W..

V I A

A.

UVv

&%to9

,'.PvorI~O wesmvIlL Itulnee Parameter 1st Fl Lunchroom 1st Fl Kdichen 2nd Fl Iitchen Prasure Ti Drain Liwnt cis-1.3-Dichloropropene

<0.5

<0.5 trans-l,3-Dichloropropene

<0.5

<0.5 Ethylbenzens

<0.5

<0.5 700 Hexachlorobutadiene c0.5

<0.5

<0.5 Isoprpoylbenzene

<0.5

'0.5

<0.5

<0.5 4-isopropyltoluene

<0.5

<0.5 MTBE

<1.0

<1.0 Napthalene

<1.0

<1.0 ný-Propylbenzene

<0.5

<0.5 Styrene

<0.5

<0.5 100 S1,1,,2-Tetrachloroethane

<0.5

<0.5 1.1.2,2-Tetrachloroethane

<1.0

<1.0 Tetrachloroethene

<0.5

'0.5

<0.5

<0.5 5

Toluene

<0.5

<0.5 1000 1.2.3-Trichloobetne

<0.5

<0.5 1,2.4-Trichlorobenzmen

<0.5

<0.5 70 1,1,1-Trichloroethane

<0.5

<0.5 200 1,1.2-Trlchloretane

<0.5

<0.5 5

Trichloroethene

<0.5

<0.5 5

Trkchloroftuoromethane

<1.0

<1.0 01.0 1,2,3..Trichlocopropane

<0.5

'0.5

<0.5

<0.6 1,,,4-Trimethybenzene

<0.5

<0.5 1,3.5-Tvnmehybenzere

'0.5

<0.5

<0.5 Vinyl Chloride

<0.5

<0.5 2

Xylenes. Total

<1.0

<1.0 10000 Bromodichlotmethone

<c0.5

<0.5

<0.5 Bromoform *

<0.5

<0.5 Chloroform

<0.5 40.5

<0.5

<0,5 Dibromochl ororthane

<0.5

'0.5

<0.5 Total Trihalomethanes

<0.5

wq,.8 lar*t.8

41*6adr*;,l*

4Wj qW&

Potable Water VOC Results 1st Quarter 1999 uOIL Cos COs COs COO Parameter 1st Fl Lunchroom 1st Fl Kitchen 2nd Fl Kitchen Preuwe Trk Drain Umit Benzene

<0.5

<0.5 5

Browobenzene

<0.5

<.0.5

<0.5

<0.5 Bromochloromethane

<0.5

<0.5 Bromomethane

<0.5

'.0.5

<0.5 n-Butylbenzene

<0.5

<0.5 s.c-Butylbenzene

<0.5

<0.5 Tert,.utylbenzane

<0.5

<.0.5

<0.5

<0.5 Carbon Tetrachloride

<0.5

<0.5 5

Chlorobenzene

<0.5

<0.5 100 Chloroethane

<0.5

<0.5 Chloromethane

<0.5

-.0.5

<0.5 4-Chkorotoluene

<0.5 40.5

<0.5

<0.5 2-Chlorotoluene

<0.5

'.0.5 Dibomomethane

<1.0

<1.0 1,2-Dichlorobenzene

<0.5

<0.5 600 1,3-Dlchlorobermne

'<0.5

<0.5

<c0.5 1.4-Dichlorobenzene CO.5

<0.5

<0.5 Dichioroddiluoromethane

<0.5

'.0.5

<0.5

<0.5 1.1-Dichlo<etwone

<0.5 1.2-Dichloreltane

<0.5

<0.5 60.5

<0.5 5

cis-1.2-Dichloroethene

<0.5

<0.5 70 trans-1,2-Dichoroethene

<0.5

<0.5 100 DMchloromethane

<1.0

<1.0 5

1.2-Dichloropropsne

<0.5

<0.5 5

1.3-Dichloropropone

<0.5

<0.5 2.2-Dichloropropene

<0.5

<0,5 1.1--Dchloopwopene

'<0.5

,<0.5

'<0.5

<0.5

SVE Associates Engineering Surveying Landscape Architecture Planning Type of Submittal Petroleum Reimbursement Fund Phase Workscope/Budget Initial Response Action

-Technical Report Free Product Reimbursement Request Initial Site Characterization 2monitoring Result (pre-permit)

Site Investigation Monitoring Result (post-permit)

Remedial Action Plan Remedial Design Plan lRemedial Implementation/Operations/Monitoring I

Groundwater Management Permit December 1999 Groundwater Monitoring Results Vermont Yankee Nuclear Power Station Vernon, VT (VT DEC Site #99-2617 Latitude 42 degrees, 46', 42.7"N Longitude 72 degrees, 43'26" USGS Brattleboro River Quad Prepared For:

Vermont Yankee Nuclear Power Station P.O. Box 157 Vernon, VT 05454-0157

Contact:

David Tkatch Prepared By:

SVE Associates 28 Mechanic St.

Keene, NH 03431

Contact:

Steven L. Brackett February 1, 2000 MAR 7 2000 Recommended Risk Category

1. Immediate Human Health Risk

4. Surface Water Impact (Actual

7. Alternate Water Available/Low (Impacted Water Well, etc.)

Impact to Class B or potential Impact to level Groundwater Contamination (<1000 x Class B)

AGQS)

2. Potential Human Health Risk (Residential well within 1000' or site 5 S. No Alternate Water Available/No

8. No AGQS Violation/No Source

.within wellhead area)

Existing Wells in Area Remaining

3. Free Product or Source Hazard

6. Alternate Water Available/High Level Groundwater Contamination

(>1000 x AGQS) 28 Mechanic St., Keene, NH 03431 Phone: (603) 355-1532 Fax (603) 355-2969 P.O. Box 1818. Brattleboro, VT05302-1818 Phone: (802) 257-0561 Fax (802)257-0721 P.O. Box 1818, Brattleboro, VT 05302-18 18 Phone: (802) 257-0561 Fax (802) 257-0721

SVE Associates Engineering Surveying Landscape Architecture Planning March 3, 2000 Gerold Noyes, Project Manager VT DEC, Sites Management Section 103 South Main St./ West Building Waterbury, VT 05671-0404 Gerold:

On behalf of our client, SVE Associates is pleased to submit the results of the December 1999 round of Groundwater Monitoring for the Vermont Yankee site (DEC #99-2.617), Vernon, VT.

INTRODUCTION The Vermont Yankee Nuclear Power Station site is located on the Connecticut River in the town of Vernon, VT. The site is a nuclear powered electrical generating station which has been in operation since 1972. In the spring of 1999 monitoring wells were installed in the vicinity of a former underground storage tank as part of a complete environmental assessment of the site.

Groundwater samples from these wells contained VOC's in excess of Vermont Groundwater Enforcement Standards. A Site Investigation was conducted to determine the degree and extent of this contamination. During this investigation 5 additional wells were installed at this site, for a total of 9 wells. Free phase fuel oil was encountered in wells, MW-1, MW-8 and MW-9.

The Site Investigation recommended that the appropriate remedial action was passive free product recovery and natural attenuation with quarterly monitoring of ground water.

DECEMBER 1999 GROUNDWATER MONITORING RESULTS On December 16, 1999 staff of SVE Associates conducted groundwater monitoring at the Vermont Yankee Nuclear Power Station site. This consisted of measuring groundwater elevation, purging the wells of three well volumes of groundwater, and collecting groundwater samples.

Groundwater samples were collected from all nine monitoring wells. Each sample was bottled in 40 ml glass VO vials and was sent to Eastern Analytical of Concord, NH for analysis according to EPA Method 8260. A summary of the analytical results is contained in Table I below.

Free product recovery is being conducted in MW-1 and MW-8. MW-9 has a sheen but FP recovery is not being conducted due to its proximity to the other more heavily contaminated wells.

28 Mechanic St., Keene, NH 03431 Phone: (603) 355-1532 Fax (603) 355-2969 P.O. Box 1818, Brattleboro, VT 05302-1818 Phone: (802) 257-0561 Fax (802) 257-0721

Table I Summary of Groundwater Analytical Data (S-MW-IVY 4.1 5/10/99 7/16/99 12/29/99 MW-2S 5/10/99 MW-2DNY 4.3 5/10/99 7/16/99 12r29/99 MW-3NVY 4.2 5/12/99 7/16/99 12/29/99 MW-4/VY 4.4 5/12/99 7/16/99 12/29/99 MW-5VY 4.5 12/29/99 MW-61VY 4.6 12/29/99 MW-7NY 4.7 12/29/99 MW-8NY 4.8 12/29/99 MW-9IVY 4.9 12/29/99 Benzene Ethyl-benzene Toluene ND 27 ND.

ND ND ND 1

39 ND ND ND ND NO ND ND NS NS NS ND ND ND ND ND ND ND NS ND ND ND ND ND ND ND ND ND NO NS ND ND ND ND ND NS ND ND xylene MTBE i naphthalene 1 PCE 1,2.4 Timerethylbenzene 1,3,5 TrImethybenzene 18 N

ND.

N ND 120 ND 980 ND 19 ND 300 ND 190 94 ND ND ND 3

ND ND ND ND NS NS NS I

NS ND ND ND ND ND ND ND ND ND 18 1

1 ND ND O

17 ND ND ND 22 ND ND ND ND ND ND NS NS NS NS ND.

ND ND ND ND ND ND ND ND ND ND ND 4

ND 200 ND 91 38 ND ND ND ND ND ND I

70 ND 320 ND 430 180 I

N 1

N 40 j

ND 190 ND 200 NO89 I

ND 22 ND ND ND

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120 ND 45 ND

Table 2 Groundwater Elevations Ground Elevation Measured Water Depth GW Elevation MW-1 200.16 18.75 181.41 MW-2 200.21 18.87 181.34 MW-3 200.00 18.73 181.27 MW-4 199.67 18.37 181.30 MW°5 200.17 18.84 181.33 MW-6 200.19 18.82 181.37 MW-7 200.23 18.84 181.39 MW-7 200.29 18.87 181.42 MW-9 200.32 18.91 181.41 ta~

CONCLUSIONS AND RECOMMENDATION Vermont Groundwater Enforcement Standards continue to be exceeded in the groundwater from MW-2, MW-6, MW-8 and MW-9 at the Vermont Yankee Nuclear Power Station site. The results in MW-2 are similar to the levels seen in the prior rounds of sampling. SVE has no recommendation for a change in the scope of frequency of groundwater monitoring.

The next round of groundwater monitoring will be conducted in April 2000.

Best Regards, Project Manager SVE Associates Engineering Surveying 28 Mechanic Street, Keene. NH 03431 Landscape Architecture Planning Phone (603) 355-1532 Fax X603) 355-2969

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