st. albans exxon 190 south main st. (rte. 7) st. albans

St. Albans Exxon

190 South Main St. (Rte. 7)

St. Albans, Vermont VTDEC Site #2002-2953; KAS Job #412040150

MAY 2015 GROUNDWATER MONITORING REPORT

July 8, 2015

Prepared for:

Wesco, Inc.

32 San Remo Drive

P.O Box 2287

South Burlington, Vermont 05403

May 2015 Groundwater Monitoring Report

St. Albans Exxon, St. Albans, Vermont

Table of Contents

1.0 Introduction ............................................................................................................................................ 1

2.0 Site Background ..................................................................................................................................... 1

3.0 Groundwater Monitoring ...................................................................................................................... 1

3.1 Determination of Groundwater Flow Direction and Gradient ......................................................................... 1

3.2 Groundwater Sample Collection and Analysis ......................................................................................................... 2

3.3 Contaminant Trend Analysis ............................................................................................................................................ 2

3.4 Quality Assurance and Quality Control....................................................................................................................... 3

4.0 Conclusions ............................................................................................................................................. 3

5.0 Recommendations ................................................................................................................................. 3

Appendices

Appendix A 1) Site Location Map

2) Site Map

3) Groundwater Contour Map

4) Contaminant Concentration Map

Appendix B Liquid Level Monitoring Data

Appendix C Groundwater Quality Summary

Appendix D Analytical Laboratory Report



1

1.0 Introduction

This report summarizes the May 2015 monitoring of subsurface petroleum contamination at the St. Albans

Exxon property (VTDEC Site # 2002-2953; Site) located at 190 South Main St. (US Route 7), St. Albans,

Vermont, (See Site Location Map, Appendix A). This work has been conducted for Wesco, Inc. (Wesco) of

South Burlington, Vermont. The scope of this monitoring event included obtaining liquid level

measurements and the collection and analysis of groundwater samples from site related monitoring wells.

All work was performed in accordance with the Work Plan and Cost Estimate for Groundwater Monitoring

dated February 18, 2015. Approval to proceed with this monitoring event was granted by Mr. Gerold

Noyes of the Vermont Department of Environmental Conservation (VTDEC) in an electronic mail message

to Wesco dated April 22, 2015.

2.0 Site Background

Groundwater monitoring was initiated at this Site due to a detection of petroleum impact to onsite

subsurface soils during a piping replacement inspection conducted on November 14, 2001. Ten soil

borings were advanced under the supervision of Heindel & Noyes, Inc., in August 2002; six of them were

completed as monitoring wells. Groundwater monitoring was conducted periodically from August 2002 to

December 2003. Annual groundwater monitoring has been conducted at this site since December 2003.

Monitoring wells MW-4 and MW-5 were replaced in July 2012. Copies of previous reports are on file at the

VTDEC office in Montpelier, VT.

3.0 Groundwater Monitoring

3.1 Determination of Groundwater Flow Direction and Gradient

Water table elevation measurements were collected from four site monitoring wells on May 6, 2015. Two

of the Site related wells could not be located (MW-4R and MW-5R). The depth to groundwater in the wells

on May 6, 2015 ranged from 10.63 feet in MW-6 to 14.30 feet below top-of-casing in MW-1. The depth to

water in each well was subtracted from the top of casing elevation to obtain the relative water table

elevation. No free phase petroleum product was detected in the wells on May 6, 2015. Water level data are

presented in Appendix B. The water table elevation for MW-1 is the highest to date while the water table

elevations for MW-2 and MW-3 are the lowest to date.

Water table elevations were plotted on the Site Map to generate the Groundwater Contour Map (Appendix

A). Based on the groundwater elevations obtained on May 6, 2015 groundwater elevation was fairly

uniform across the Site. According to these data, the direction of the groundwater flow beneath the Site



2

appears to generally be flowing to the west. The hydraulic gradient for the Site was calculated on average

to be 6.2%. The groundwater elevation data is generally consistent with the data collected in April 2013.

3.2 Groundwater Sample Collection and Analysis

KAS collected groundwater samples from three Site wells on May 6, 2015. The groundwater samples were

collected according to KAS’ monitoring well sampling with disposable bailers, stored on ice in the field,

and submitted to Endyne, Inc. of Williston, Vermont under proper chain-of-custody procedures. The

groundwater samples were analyzed for petroleum related VOC’s by EPA Method 8021B.

Analytical results of the groundwater samples collected on May 6, 2015 from the monitoring wells are

summarized and graphed in Appendix C along with the applicable Vermont Groundwater Enforcement

Standards (VGES) for the target petroleum compounds. The laboratory analysis report for the May 6, 2015

sampling data is included in Appendix D.

The laboratory report indicates that dissolved petroleum constituents were present in the groundwater

sample collected from all of the sample locations, at concentrations above the detection limits of the test

method. Concentrations of select VOCs were present above the Vermont Groundwater Enforcement

Standards (VGES) in the groundwater sample collected from all well locations. No unidentified peaks were

reported in any groundwater samples. A tabulation and graphic presentation of analytical data for the

groundwater monitoring wells is provided in Appendix C.

3.3 Contaminant Trend Analysis

Overall, VOC concentrations in MW-1 have declined by 68% since the last sampling event in April 2013

and 95% since sampling began in August 2002. VOC concentrations reported at MW-1 are the lowest

reported to date. Total targeted VOC concentrations in MW-2 have increased slightly since the last time

the well was sampled in 2013, but have decreased by 86% since sampling began in 2002. VOC

concentrations in MW-3 continue to fluctuate, but are still within their historical range. Water elevation and

total VOCs in general have exhibited no distinct correlation since monitoring began. Additional data is

needed over time to determine trends in contaminant concentrations and their potential relationship with

groundwater elevations.

The analytical results were plotted to show the distribution of total targeted VOCs across the Site (see

Contamination Concentration Map, Attachment A). The map indicates that the highest dissolved phase

contaminant concentrations lie in the vicinity of MW-3 which is down gradient of the former USTs. The

extent of the contaminant plume is not fully defined at this time and likely extends further northwest



3

beyond MW-4R. Based on current and historical data analysis it is not likely that any sensitive receptors,

beyond site soil and groundwater, are being impacted at this time.

3.4 Quality Assurance and Quality Control

Samples were collected according to KAS’ groundwater sampling protocol. No VOCs were detected in the

trip blank sample prepared on May 6, 2015. Relative percent difference (RPD) is defined as one hundred

times the difference between the actual sample and the duplicate sample, divided by the mean of the two

samples. RPD values are used to determine if adequate quality assurance and control (QA/QC) were

maintained during sample collection and analysis. The RPD Calculations are presented in the Groundwater

Quality Summary in Appendix C. For the May 6, 2015 sample event, the duplicate sample was collected

from monitoring well MW-2. The RPD for total targeted VOCs was 7.5% indicating adequate precision.

4.0 Conclusions

Based on the results of the May 6, 2015 groundwater monitoring event and previous work performed at

the Site, the following conclusions are offered:

The groundwater flow direction for the May 6, 2015 monitoring event was to the west at an estimated

hydraulic gradient of 6.2%. The groundwater elevation and flow direction are consistent with previous

estimates from the site;

Select petroleum constituents were reported in groundwater samples collected from MW-1, MW-2,

and MW-3 at concentrations above the applicable VGES;

The extent of the low to moderate dissolved petroleum VOC impact is likely limited to the area down

gradient of the former USTs. The core of the contaminant plume is located in the vicinity of MW-3;

and,

There is no apparent threat to human health or sensitive receptors from the low to moderate

concentrations of dissolved contamination below the Site.

5.0 Recommendations

Due to the continued presence of compounds above VGES but the overall decreasing contaminant

concentrations reported in groundwater beneath the Site, KAS recommends groundwater monitoring be

conducted on a biennial basis with the next event to occur in the spring of 2017. During the next sampling

event, monitoring wells MW-1 through MW-5R should be sampled for petroleum compounds via EPA

Method 8021B. The remaining wells should be gauged for water level. Following the scheduled removal of

the USTs in July/August 2015 KAS will reevaluate the site data and present recommendations in the UST

closure assessment report.



Appendix A

1) Site Location Map

2) Site Map

3) Groundwater Contour Map

4) Contaminant Concentration Map

North

KAS Job Number: 412040150

Source: USGS 7.5' Mapping St. Albans, VT 1948, photorevised 1987

St. Albans Exxon

Route 7

St. Albans, VT

Site Location Map

USGS Mapping

Date: 07/08/15 Drawing No. 1

Scale: 1:21,600 By: MB

SITE



Appendix B

Liquid Level Monitoring Data

KAS, Inc. Historical Liquid Level Data St. Albans Exxon

St. Albans, Vermont

Measurement Date:

Well I.D. 11/13/2002 6/30/2003 12/2/2003 1/10/2005 12/29/05 12/6/2006 1/10/2008 11/17/2009

MW-1 86.85 86.68 87.35 87.05 87.04 87.29 87.52 87.08

MW-2 86.75 86.61 87.19 86.88 86.92 87.12 87.26 86.50

MW-3 85.62 86.50 86.20 85.71 85.80 85.99 86.32 85.84

MW-4/4R 83.40 83.23 84.16 NM NM 84.16 84.54 83.39

MW-5/5R 83.94 83.74 84.50 NM 84.09 84.41 85.13 83.86MW-6 88.08 87.67 89.52 88.5 88.64 89.65 90.39 87.78

Measurement Date:

Well I.D. 1/4/2012 8/8/2012 4/8/2013 5/6/2015

MW-1 86.57 NM 87.30 87.63

MW-2 NM NM 87.41 86.38

MW-3 86.42 NM 85.84 84.6

MW-4/4R NM 83.83 84.52 NM

MW-5/5R NM 83.83 85.02 NMMW-6 88.66 NM 88.63 88.37

All measurements in feet

Historic Water Levels

VTDEC Site #2002-2953

KAS, Inc. Liquid Level Monitoring Data St. Albans Exxon

St. Albans, Vermont

Monitoring Date: 5/6/15

Top Specific Corrected Corrected

Well I.D. of Casing Depth To Depth To Product Gravity Hydro Depth Water Table

Elevation Product Water Thickness Of Product Equivalent To Water Elevation

MW-1 99.60 - 11.97 - - - 11.97 87.63

MW-2 99.49 - 13.11 - - - 13.11 86.38

MW-3 98.90 - 14.30 - - - 14.30 84.60

MW-4 96.70 - NM - - - NM NM

MW-5 98.31 - NM - - - NM NM

MW-6 99.00 - 10.63 - - - 10.63 88.37

All measurements in feet

Elevation data obtained from Heindel & Noyes

Monitoring well top of casing elevations surveyed by Heindel & Noyes in August 2002




Appendix C

Groundwater Quality Summary

KAS, Inc. Groundwater Quality Summary St. Albans Exxon

St. Albans, Vermont

PARAMETER MW-1 MW-2 MW-3 MW-4R MW-5R MW-6 VGES

Benzene 6.3 20.4 31.4 5Toluene ND<5.0 11.4 ND<50.0 Not Not Not 1000Ethylbenzene 15.1 655. 1,060. Sampled Sampled Sampled 700Xylenes ND<10.0 101. 1,290. During May 6, 2015 During May 6, 2015 During May 6, 2015 10000

Total BTEX 21.4 788. 2,381. Site Visit Site Visit Site Visit -

MTBE ND<10.0 ND<20.0 ND<100 401,3,5-Trimethylbenzene ND<5.0 52.3 499. 3501,2,4-Trimethylbenzene 17.5 391. 1,290.Naphthalene 12.8 20.3 331. 20

Total VOCs 51.7 1,251. 4,501. -

ANALYSIS: EPA Method 8021BVGES = Vermont Groundwater Enforcement Standard (2/14/2005)ND<1 = not detected less than detection limitBold indicates a detection. > VGESAll Values Reported in ug/L (ppb), except where indicated

Monitoring Date: May 6, 2015

VTDEC Site # 2002-2953


St. Albans, Vermont

PARAMETER 08/08/02 11/13/02 6/30/03 12/2/03 1/10/05 12/29/05 12/6/06 1/10/08 VGES

Benzene 32.0 25.8 17.1 24.6 15.1 19.9 33.8 Could 5Toluene ND<5.0 ND<5.0 ND<5.0 6.8 ND<5.0 ND<5.0 ND<5.0 not 1000Ethylbenzene 39.0 53.3 37.0 40.0 32.9 39.7 37.8 be 700Xylenes 188. 91.3 27.3 71.0 85.8 110. 70.8 sampled 10000

Total BTEX 259. 170. 81.4 142.4 133.8 170. 142.4 -

MTBE 500. 435. 311. 457. 386. 283. 251. 401,3,5-Trimethylbenzene 37.0 51.8 34.6 42.3 38.2 44.6 46.1 3501,2,4-Trimethylbenzene 134. 136. 66.2 95.2 104. 118. 104.Naphthalene 129. 131. 68.8 96.6 67.0 66.4 54.5 20

Total VOCs 1,059. 924. 562. 834. 729. 682. 598. -

TPH (mg/L) 4.91 NA NA NA NA NA NA -

PARAMETER 11/17/09 1/4/12 4/8/13 5/6/15 VGES

Benzene 12.6 13.0 6.4 6.3 5Toluene ND<5.0 ND<5.0 ND<5.0 ND<5.0 1000Ethylbenzene 26.5 17.4 13.6 15.1 700Xylenes 35.1 ND<10.0 19.8 ND<10.0 10000

Total BTEX 74.2 30.4 39.8 21.4 -

MTBE 87.2 57.4 30.4 ND<10.0 401,3,5-Trimethylbenzene 17.2 12.0 17.8 ND<5.0 3501,2,4-Trimethylbenzene 54.3 26.4 43.9 17.5Naphthalene 36.6 15.2 27.6 12.8 20

Total VOCs 269.5 141.4 159.5 51.7 -

ANALYSIS: EPA Method 8021B, except for TPH by EPA Method 8015 DROVGES = Vermont Groundwater Enforcement Standard (2/14/2005)ND<1 = not detected less than detection limitBold indicates a detection. NA = not applicable, not analyzedAll Values Reported in ug/L (ppb), except where indicated > VGES

MW-1

Sample Date:

Sample Date:

86.40

86.60

86.80

87.00

87.20

87.40

87.60

87.80

0.

100.

200.

300.

400.

500.

600.

700.

800.

900.

1,000.

1,100.

1,200.

04/19/01 01/14/04 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17

Gro

un

dw

ate

r E

leva

tio

n (

ft)

Co

nta

imin

atio

n C

on

cen

trat

ion

(pp

b)

Date

MW-1Contaiminant Concentration vs. Groundwater Elevation

Total VOCs

Groundwater Elevation



St. Albans, Vermont

PARAMETER 08/08/02 11/13/02 6/30/03 12/2/03 1/10/05 12/29/05 12/6/06 01/10/08 VGES

Benzene 337. 423. 412. 326. 265. 260. 250. 178. 5Toluene 118. 115. 79.6 125. 55.3 58.7 56.0 33.6 1000Ethylbenzene 1,230. 989. 917. 832. 1,100. 992. 885. 1,020. 700Xylenes 2,660. 1,450. 827. 792. 407. 618. 496. 387. 10000

Total BTEX 4,345. 2,977. 2,236. 2,075. 1,827. 1,929. 1,687. 1,619. -

MTBE 1,240. 1,010. 1,050. 657. 295. 153. ND<100. ND<40.0 401,3,5-Trimethylbenzene 687. 675. 642. 537. 456. 471. 465. 264. 3501,2,4-Trimethylbenzene 2,390. 1,780. 1,380. 1,090. 1,120. 1,060. 961. 925.Naphthalene 414. 504. 450. 435. 452. 340. 392. 372. 20

Total VOCs 9,076. 6,946. 5,758. 4,794. 4,150. 3,953. 3,505. 3,180. -

TPH (mg/L) 35.50 NA NA NA NA NA NA NA -

PARAMETER 11/17/09 1/4/12 4/8/13 5/6/15 VGES

Benzene 85.1 NS 41.8 20.4 5Toluene 19.9 NS ND<10.0 11.4 1000Ethylbenzene 730. NS 629 655 700Xylenes 238. NS 59.7 101 10000

Total BTEX 1,073. NS 731. 788 -

MTBE ND<20.0 NS ND<20.0 ND<20.0 401,3,5-Trimethylbenzene 234. NS 64.6 52.3 3501,2,4-Trimethylbenzene 737. NS 396. 391Naphthalene 273. NS 37.4 20.3 20

Total VOCs 2,317. NS 1,229. 1,251 -


MW-2

Sample Date:

Sample Date:

86.20

86.40

86.60

86.80

87.00

87.20

87.40

87.60

0.

1,000.

2,000.

3,000.

4,000.

5,000.

6,000.

7,000.

8,000.

9,000.

10,000.

04/19/01 01/14/04 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17

Gro

un

dw

ater

Ele

vati

on

(ft

)

Tota

l Tar

gete

d V

OC

s (p

pb

)

Date

MW-2Contaiminant Concentration vs. Groundwater Elevation

Total VOCs




St. Albans, Vermont

PARAMETER 08/08/02 11/13/02 6/30/03 12/2/03 1/10/05 12/29/05 12/6/06 1/10/08 VGES

Benzene 356. 592. 293. 345. 274. 285. 332. 119. 5Toluene 33.0 19.7 16.4 43.3 48.3 46.7 76.6 28.3 1000Ethylbenzene 557. 755. 519. 704. 1,010. 1,160. 1,330. 893. 700Xylenes 1,250. 872. 542. 802. 1,520. 1,820. 2,270. 1,290. 10000

Total BTEX 2,196. 2,239. 1,370. 1,894. 2,852. 3,312. 4,009. 2,330. -

MTBE 448. 501. 805. 952. 829. 355. 161. 28.0 401,3,5-Trimethylbenzene 218. 408. 221. 341. 401. 557. 576. 421. 3501,2,4-Trimethylbenzene 524. 668. 405. 579. 927. 1,230. 1,230. 1,000.Naphthalene 127. 235. 233. 253. 316. 331. 385. 223. 20

Total VOCs 3,513. 4,051. 3,034. 4,019. 5,325. 5,785. 6,361. 4,002. -

TPH (mg/L) 9.78 NA NA NA NA NA NA NA -

PARAMETER 11/17/09 1/4/12 4/8/13 5/6/15 VGES

Benzene 68.9 102 34.8 31.4 5Toluene 21.6 44.7 26.9 ND<50.0 1000Ethylbenzene 856. 1,240. 1,000. 1,060 700Xylenes 1,080. 1,630. 1,330. 1,290 10000

Total BTEX 2,027. 3,017. 2,392. 2,381 -

MTBE ND<20.0 ND<40.0 ND<40.0 ND<100 401,3,5-Trimethylbenzene 480. 549. 389. 499 3501,2,4-Trimethylbenzene 1,100. 1,310. 1,190. 1,290Naphthalene 250. 282. 303. 331 20

Total VOCs 3,857. 5,158. 4,274. 4,501 -


Sample Date:

MW-3

Sample Date:

84.50

85.00

85.50

86.00

86.50

87.00

0.

1,000.

2,000.

3,000.

4,000.

5,000.

6,000.

7,000.

04/19/01 01/14/04 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17

Gro

un

dw

ater

Ele

vati

on

(ft

)

Tota

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gete

d V

OC

s (p

pb

)

Date

MW-3Contaimination Concentration vs. Groundwater Elevation

Total VOCs Groundwater Elevation



St. Albans, Vermont

PARAMETER 08/08/02 11/13/02 6/30/03 12/2/03 1/10/05 12/29/05 12/6/06 1/10/08 VGES

Benzene ND<1.0 ND<1.0 ND<1.0 ND<1.0 Not Not 3.4 ND<1.0 5Toluene ND<1.0 ND<1.0 ND<1.0 ND<1.0 Sampled Sampled ND<1.0 ND<1.0 1000Ethylbenzene ND<1.0 ND<1.0 ND<1.0 ND<1.0 Well not Well not ND<1.0 ND<1.0 700Xylenes ND<2.0 ND<2.0 ND<2.0 ND<2.0 Found Found ND<2.0 ND<2.0 10000

Total BTEX ND ND ND ND 3.4 ND -

MTBE 66.6 112. 142. 86.4 22.4 4.6 401,3,5-Trimethylbenzene ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 3501,2,4-Trimethylbenzene ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0 ND<1.0Naphthalene ND<2.0 ND<1.0 ND<1.0 ND<1.0 ND<2.0 ND<2.0 20

Total VOCs 66.6 112. 142. 86.4 25.8 4.6 -

TPH (mg/L) 0.21 NA NA NA NA NA -

PARAMETER 11/17/09 8/8/12 4/8/13 5/6/15 VGES

Benzene ND<1.0 Replacement 64.2 62.3 UNABLE 5Toluene ND<1.0 Well 7.0 20.1 TO 1000Ethylbenzene ND<1.0 Installed 141 277. LOCATE 700Xylenes ND<2.0 243 470. 10000

Total BTEX ND 455 829. -

MTBE 19.9 14.1 16.6 401,3,5-Trimethylbenzene ND<1.0 50.3 55.8 3501,2,4-Trimethylbenzene ND<1.0 121 181Naphthalene ND<2.0 25.1 40.5 20

Total VOCs 19.9 666 1123 -


MW-4/4R

Sample Date:

Sample Date:

83.00

83.20

83.40

83.60

83.80

84.00

84.20

84.40

84.60

84.80

0.0

200.0

400.0

600.0

800.0

1000.0

1200.0

04/19/01 09/01/02 01/14/04 05/28/05 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14

VO

C

Time

MW-4/4R

Total VOCs Groundwater Elevation



St. Albans, Vermont

PARAMETER 08/08/02 11/13/02 6/30/03 12/2/03 1/10/05 12/29/05 12/6/06 1/10/08 VGES

Benzene ND<7.0 ND<5.0 ND<5.0 6.1 Not 1.9 22.4 ND<1.0 5Toluene ND<5.0 ND<5.0 ND<5.0 ND<5.0 Sampled ND<1.0 ND<5.0 ND<1.0 1000Ethylbenzene ND<5.0 ND<5.0 ND<5.0 ND<5.0 Well not ND<1.0 ND<5.0 ND<1.0 700Xylenes ND<10.0 ND<10.0 ND<10.0 ND<10.0 Found ND<2.0 ND<10.0 ND<2.0 10000

Total BTEX ND ND ND 6.1 1.9 22.4 ND -

MTBE 660. 548. 365. 864. 267. 183. 24.1 401,3,5-Trimethylbenzene ND<5.0 ND<5.0 ND<5.0 ND<5.0 ND<1.0 ND<5.0 ND<1.0 3501,2,4-Trimethylbenzene ND<5.0 ND<5.0 ND<5.0 ND<5.0 ND<1.0 ND<5.0 ND<1.0Naphthalene ND<10.0 ND<10.0 5.9 ND<5.0 ND<10.0 ND<10.0 ND<2.0 20

Total VOCs 660. 548. 371. 870. 269. 205. 24.1 -

TPH (mg/L) 1.40 NA NA NA NA NA NA -

PARAMETER 11/17/09 8/8/12 4/8/13 5/6/15 VGES

Benzene ND<1.0 Replacement 2.9 ND<1.0 UNABLE 5Toluene ND<1.0 Well ND<1.0 ND<1.0 TO 1000Ethylbenzene ND<1.0 Installed 1.6 ND<1.0 LOCATE 700Xylenes ND<2.0 ND<2.0 ND<2.0 10000

Total BTEX ND 4.5 ND -

MTBE 28.9 8.6 5.2 401,3,5-Trimethylbenzene ND<1.0 1.5 ND<1.0 3501,2,4-Trimethylbenzene ND<1.0 2.0 ND<1.0Naphthalene ND<2.0 ND<2.0 ND<2.0 20

Total VOCs 28.9 16.6 5.2 -


MW-5/5R

Sample Date:

Sample Date:

83.60

83.80

84.00

84.20

84.40

84.60

84.80

85.00

85.20

0.

100.

200.

300.

400.

500.

600.

700.

800.

900.

1,000.

04/19/01 09/01/02 01/14/04 05/28/05 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14

VO

C

Time

MW-5/5R

Total VOCs




St. Albans, Vermont

PARAMETER 08/08/02 11/13/02 6/30/03 12/2/03 1/10/05 12/29/05 12/6/06 1/10/08 VGES

Benzene ND<1.0 ND<1.0 ND<1.0 ND<1.0 Not Not Not Not 5Toluene ND<1.0 ND<1.0 ND<1.0 ND<1.0 Sampled Sampled Sampled Sampled 1000Ethylbenzene ND<1.0 ND<1.0 ND<1.0 ND<1.0 Removed Removed Removed Removed 700Xylenes ND<2.0 ND<2.0 ND<2.0 ND<2.0 from from from from 10000

Total BTEX ND ND ND ND Schedule Schedule Schedule Schedule -

MTBE ND<2.0 ND<2.0 ND<2.0 ND<2.0 401,3,5-Trimethylbenzene ND<1.0 ND<1.0 ND<1.0 ND<1.0 3501,2,4-Trimethylbenzene ND<1.0 ND<1.0 ND<1.0 ND<1.0Naphthalene ND<2.0 ND<2.0 ND<1.0 ND<1.0 20

Total VOCs ND ND ND ND -

TPH (mg/L) ND<0.40 NA NA NA -

PARAMETER 01/04/12 5/6/15 VGES

Benzene ND<1.0 Not 5Toluene ND<1.0 Sampled 1000Ethylbenzene ND<1.0 700Xylenes ND<2.0 10000

Total BTEX ND -

MTBE ND<2.0 401,3,5-Trimethylbenzene ND<1.0 3501,2,4-Trimethylbenzene ND<1.0Naphthalene ND<2.0 20

Total VOCs ND -

TPH (mg/L) N/A -


MW-6

Sample Date:

MW-6

Sample Date:



St. Albans, Vermont

Sample Date: May 6, 2015

PARAMETER Trip Blank MW-2

Duplicate

(MW-2) RPD

Benzene ND<1.0 20.4 21.2 3.8%Toluene ND<1.0 11.4 11.1 2.7%

Ethylbenzene ND<1.0 655 731 11.0%Xylenes ND(2.0) 101 105 3.9%

Total BTEX ND 788 868. 9.7%

MTBE ND<2.0 ND<20.0 ND<20.0 NA1,3,5 Trimethyl Benzene ND<1.0 52.3 58.7 11.5%1,2,4 Trimethyl Benzene ND<1.0 391 422 7.6%

Napthalene ND<2.0 20.3 ND<20.0 NA

Total Targeted VOCs ND 1,251 1,349 7.5%

Analysis by EPA Method 8021B

All values in ug/L (ppb) unless noted

ND( ) = None detected (detection limit) >VGESTBQ( ) = Trace below quantitation (detection limit)

RPD = Relative Percent Difference

VGES = Vermont Groundwater Enforcement Standards (Vermont Groundwater Protection

Rule and Strategy, 2/14/2005)




Appendix D

Analytical Laboratory Report

Laboratory Report

412040150 St. Albans ExxonPROJECT:

DATE RECEIVED:

WORK ORDER:

DATE REPORTED:

100306KAS, Inc.

PO Box 787

Williston, VT 05495

Atten: Monica Beers SAMPLER:

May 22, 2015

1505-08284

Monica Beers

May 07, 2015

Reviewed by:

Harry B. Locker, Ph.D.

Laboratory Director

Enclosed please find the results of the analyses performed for the samples referenced on the attached chain of custody. All required method quality control elements including instrument calibration were performed in accordance with method requirements and determined to be acceptable unless otherwise noted.

The column labeled Lab/Tech in the accompanying report denotes the laboratory facility where the testing was performed and the technician who conducted the assay. A "W" designates the Williston, VT lab under NELAC certification ELAP 11263; "R" designates the Lebanon, NH facility under certification NH 2037 and “N” the Plattsburgh, NY lab under certification ELAP 11892. “Sub” indicates the testing was performed by a subcontracted laboratory. The accreditation status of the subcontracted lab is referenced in the corresponding NELAC and Qual fields.

The NELAC column also denotes the accreditation status of each laboratory for each reported parameter. “A” indicates the referenced laboratory is NELAC accredited for the parameter reported. “N” indicates the laboratory is not accredited. “U” indicates that NELAC does not offer accreditation for that parameter in that specific matrix. Test results denoted with an “A” meet all National Environmental Laboratory Accreditation Program requirements except where denoted by pertinent data qualifiers. Test results are representative of the samples as they were received at the laboratory

Endyne, Inc. warrants, to the best of its knowledge and belief, the accuracy of the analytical

test results contained in this report, but makes no other warranty, expressed or implied, especially no warranties of merchantability or fitness for a particular purpose.

160 James Brown Dr., Williston, VT 05495

Ph 802-879-4333 Fax 802-879-7103 ELAP 11263

www.endynelabs.com

NH203756 Etna Road, Lebanon, NH 03766

Ph 603-678-4891 Fax 603-678-4893

Laboratory Report

KAS, Inc.

Page 2 of 2

CLIENT:PROJECT: 412040150 St. Albans Exxon

WORK ORDER:DATE RECEIVED:

1505-0828405/07/2015

5/22/2015REPORT DATE:

001 Date Sampled: 5/6/15Site: MW-2 5/20/15 RGTWAnalysis Date:10:02

QualNelac

Result

UnitResult

Result

ParameterQualNelac

Result

UnitResult

Result

Parameter

TEST METHOD: EPA 8021B

< 20.0 NMethyl-t-butyl ether (MTBE) ug/L 20.4 NBenzene ug/L

11.4 NToluene ug/L 655 NEthylbenzene ug/L

101 NXylenes, Total ug/L 52.3 N1,3,5-Trimethylbenzene ug/L

391 N1,2,4-Trimethylbenzene ug/L 20.3 NNaphthalene ug/L

91 NSurr. 1 (Bromobenzene) % >10 NUnidentified Peaks


QualNelac

Result

UnitResult

Result

ParameterQualNelac

Result

UnitResult

Result

Parameter


< 100 NMethyl-t-butyl ether (MTBE) ug/L 31.4 NBenzene ug/L

< 50.0 NToluene ug/L 1,060 NEthylbenzene ug/L

1,290 NXylenes, Total ug/L 499 N1,3,5-Trimethylbenzene ug/L

1,290 N1,2,4-Trimethylbenzene ug/L 331 NNaphthalene ug/L



QualNelac

Result

UnitResult

Result

ParameterQualNelac

Result

UnitResult

Result

Parameter



< 5.0 NToluene ug/L 15.1 NEthylbenzene ug/L

< 10.0 NXylenes, Total ug/L < 5.0 N1,3,5-Trimethylbenzene ug/L

17.5 N1,2,4-Trimethylbenzene ug/L 12.8 NNaphthalene ug/L


004 Date Sampled: 5/6/15Site: Duplicate 5/20/15 RGTWAnalysis Date:10:02

QualNelac

Result

UnitResult

Result

ParameterQualNelac

Result

UnitResult

Result

Parameter



11.1 NToluene ug/L 731 NEthylbenzene ug/L

105 NXylenes, Total ug/L 58.7 N1,3,5-Trimethylbenzene ug/L

422 N1,2,4-Trimethylbenzene ug/L < 20.0 NNaphthalene ug/L


005 Date Sampled: 5/6/15Site: Trip Blank 5/20/15 RGTWAnalysis Date:07:52

QualNelac

Result

UnitResult

Result

ParameterQualNelac

Result

UnitResult

Result

Parameter


< 2.0 NMethyl-t-butyl ether (MTBE) ug/L < 1.0 NBenzene ug/L

< 1.0 NToluene ug/L < 1.0 NEthylbenzene ug/L

< 2.0 NXylenes, Total ug/L < 1.0 N1,3,5-Trimethylbenzene ug/L

< 1.0 N1,2,4-Trimethylbenzene ug/L < 2.0 NNaphthalene ug/L

103 AN1NSurr. 1 (Bromobenzene) % 0 NUnidentified Peaks

Report Summary of Qualifiers and Notes

AN1: Sample -005 was run 25 minutes outside the 12 hour analysis window for method 8021B.

st. albans exxon 190 south main st. (rte. 7) st. albans

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