december 2016 groundwater sampling report · december 2016 groundwater sampling report nefcu st....

December 2016 Groundwater Sampling Report

NEFCU St. Albans ATC Project No. 280EM00049

Prepared for New England Federal Credit Union January 10, 2017

December 2016 Groundwater Sampling Report

NEFCU St. Albans 172 South Main Street St. Albans, Vermont VT DEC Site #2014-4537 ATC Project No. 280EM00049

December 2016 Groundwater Sampling Report NEFCU St. Albans

January 10, 2017 ATC ii

Document Information Prepared for New England Federal Credit Union Project Name NEFCU St. Albans File Reference NEFCU GW Sample Report Fall 2016.docx Job Reference ATC Project No. 280EM00049 Date January 10, 2017

Contact Information ATC Group Services LLC 171 Commerce Street Williston, Vermont 05495 Telephone: 802.862.1980 Facsimile: 802.862.1405 www.atcassociates.com

Document Control

Version Date Author Author Initials Reviewer Date Reviewer

Initials

Draft 1/4/2017 Adam Forman af Thomas J. Broido 1/4/2017 tb

Draft 1/6/2017 Adam Forman af Tom Richards 1/6/2017 tr

Draft 1/10/2017 Adam Forman af Tom Richards 1/10/2017 tr

© ATC 2015. Copyright in the whole and every part of this document belongs to ATC and may not be used, sold, transferred, copied or reproduced in whole or in part in any manner or form or in or on any media to any person other than by agreement with ATC.

This document is produced by ATC solely for the benefit and use by the client in accordance with the terms of the engagement. ATC does not and shall not assume any responsibility or liability whatsoever to any third party arising out of any use or reliance by any third party on the content of this document.


January 10, 2017 ATC iii

Executive Summary ATC Group Services LLC (ATC) was retained by New England Federal Credit Union (NEFCU) (Client) to perform petroleum consulting services including groundwater sampling at 172 South Main Street, St. Albans, Vermont (herein referred to as “the property”). Previous Phase I ESAs were completed at the property as part of real estate transactions which identified recognized environmenal conditions at the property. A subsequest subsurface investigation confirmed the presence of historical subsurface petroleum impacted soils and groundwater on the property. As a result, The Vermont Department of Environmental Conservation (VTDEC) requested additional investigation activities at the property in a letter dated October 14, 2014. ATC completed a Phase II ESA dated February 18, 2015 that identfied residual subsurface contamination on the property. ATC and the VTDEC recommended conducting additional groundwater sampling of the existing monitoring wells.

The following summarizes conclusions from the December 13, 2016 sampling event.

1. Based on groundwater elevation measurements, the groundwater flow direction appears to be toward the northwest. The measured groundwater elevations were near historically high levels, and were higher than the elevations reported in each well during the December 2014 sampling event. ATC and the VTDEC were anticipating the groundwater elevations to be depressed in December which would correspond with previous sampling conducted in December.

2. Groundwater sampling results indicated VOC concentrations slightly exceeded the Vermont Groundwater Enforcement Standard (VT GES) in monitoring well MW-3. The concentrations in monitoring well MW-3 slightly increased from the previous sampling event, but remained significantly less than sampling events in 2014 and 2015. The total VOC concentrations generally continued to indicate decreasing concentrations in the remaining monitoring wells. MTBE was detected in monitoring well MW-4; however, the concentration remained below the VT GES. The MTBE is potentially migrating from an offsite source.

Based on the findings of this groundwater sampling event, ATC offers the following recommendations.

• Based on the low and generally decreasing VOC concentrations reported at the site and low risk to sensitive receptors, the site could be considered by the VT DEC for a Site Management Activity Completed designation with a Notice to Land Records to document low level residual subsurface petroleum contamination. However, if additional data is desired to characterize the groundwater contamination, ATC recommends a round of groundwater sampling from the onsite monitoring wells in the fall of 2017.


January 10, 2017 ATC iv

Table of Contents Executive Summary ........................................................................................................................... iii 1 Introduction ................................................................................................................................ 1

1.1 Purpose ........................................................................................................................................... 1 1.2 Background Review ........................................................................................................................ 1

2 Investigation Activities .............................................................................................................. 2 2.1 Groundwater Sample Results ......................................................................................................... 2

3 Conclusions and Recommendations ....................................................................................... 4 3.1 Conclusions ..................................................................................................................................... 4 3.2 Recommendations .......................................................................................................................... 4

4 Qualifications ............................................................................................................................. 5

5 Reliance ...................................................................................................................................... 6

Tables Table 1 Groundwater Quality Results

Table 2 Groundwater Elevation Data

Table 3 Water Parameter Measurements

Figures Figure 1 Property Plan

Figure 2 Groundwater Contour Map

Figure 3 TVOC Concentrations in Groundwater Map

Graph Graph 1 VOC Concentration Trendlines

Appendices Appendix A Groundwater Laboratory Report


January 10, 2017 ATC 1

1 Introduction

1.1 Purpose ATC was contracted by New England Federal Credit Union (the Client) to conduct groundwater sampling at the 172 South Main Street site located in St. Albans, Vermont (the site). A Property Plan is included as Figure 1. Based on the electronic mail response from the Vermont Department of Environmental Conservation (VT DEC) dated July 11, 2016, ATC prepared a Proposal for Fall 2016 Groundwater Sampling dated September 19, 2016. The VT DEC letter requested the groundwater sampling be conducted in December which is the when the lowest water table elevations and the highest VOC concentrations have been recorded during previous sampling events at the site.

1.2 Background Review ATC understands that Phase I Environmental Site Assessments conducted on the property as part of real estate transactions identified recognized environmental conditions (RECs) on the property. The RECs included the historical usage of the property as a gasoline station, and the current presence of a gasoline station on the adjacent property to the west across South Main Street. The historical usage of the property was reportedly as a gasoline filling station from 1947 to 1981. Underground storage tanks (USTs) were reportedly removed from the property, but no documentation was apparently available that provided information about the tank locations or conditions.

A subsequent subsurface investigation performed by KAS Environmental Science and Engineering (KAS) dated September 15, 2014, confirmed the presence of historical subsurface petroleum impacted soils and groundwater on the site. The report surmised the historical USTs located on the property were likely located on the southeastern portion of the property where subsurface contamination was identified. As a result, the Vermont Department of Environmental Conservation (VTDEC) requested additional investigation activities at the property.

ATC completed a Phase II ESA report dated February 18, 2015 that identified soil and groundwater petroleum impacted soils remain on the property. A ground penetrating radar assessment did not identify evidence of historical USTs beneath the parking lot on the eastern side of the property building. The horizontal degree and extent of contamination to the south was not fully defined. The adjacent residential building to the south appeared to likely be cross-gradient from the contaminant migration; however, the soil and groundwater sampling located near the southern property boundary indicated the highest VOC concentrations. ATC screened the indoor air in the basement and first level of the property building with a PID and did not identify detectable concentrations of VOCs. Based on ambient air screening with a PID, the weathered petroleum hydrocarbon contamination, and the depth of the contamination, the indoor air of the property building does not appear to be impacted by the petroleum release. However, the soil and groundwater plume appears to extend beneath the property building.



2 Investigation Activities

2.1 Groundwater Sample Results On December 13, 2016, ATC collected groundwater samples from the four (4) groundwater monitoring wells on-site utilizing low flow sampling procedures. A Geotech® Geopump peristaltic pump was utilized to extract water from the well and flow through a holding cell, where natural attenuation parameters were measured. Using a YSI 556 Water Parameter Meter (YSI), and a flow cell, the following natural attenuation parameters were measured: pH, temperature, dissolved oxygen, oxygen reduction potential, and specific conductivity. The natural attenuation parameters measured are presented in Table 3.

Prior to groundwater sampling, the depth to water was measured in each of the groundwater monitoring wells. The groundwater elevation was calculated by subtracting the depth to groundwater from the surveyed top of casing elevations of the monitoring wells. The potentiometric surfaces were plotted on the groundwater contour map presented as Figure 2. The map indicates the groundwater flow direction is in a north-westerly direction. Per the July 11, 2016 VT DEC letter, it was anticipated the groundwater elevation would be low during the December sampling event which would correspond with previous sampling events. The measured depth to groundwater during the December 2016 sampling event indicated similar or higher groundwater elevations as compared to previous sampling events, and the elevations in each well were consistently higher than the December 2014 sampling event.

Groundwater samples were collected from the four (4) groundwater monitoring wells and submitted for laboratory analysis of VOCs via EPA Method 8021B. The groundwater sample collected from monitoring well MW-3 exceeded the Vermont Groundwater Enforcement Standard (VT GES) for the parameters Trimethylbenzene and Naphthalene. The concentrations were generally less than or similar to previous sampling results in monitoring well MW-3. Overall, the total VOC concentrations have generally indicated decreasing total VOC concentrations since the initial sampling in 2014, which is presented on Graph 1.

A detectable concentration of MTBE was identified in well MW-4 but remained below the VT GES. MW-4 is located on the downgradient side of the property near the northwestern property boundary. MTBE is highly soluble in water which results in significant mobility within an aquifer. MTBE was not detected during the initial sampling events at the property in December 2014. This indicates MTBE is potentially migrating onto the property from an offsite source; however, the two upgradient monitoring wells (MW-1 and MW-2) located on the property do not indicate the presence of MTBE above laboratory reporting limits. The two (2) downgradient monitoring wells MW-3 and MW-4 currently or historically have indicated the presence of MTBE in low concentrations below the VT GES.

Due to the highly mobile nature of MTBE, this could indicate the MTBE is being transported through preferential pathways. Direct evidence of a utility corridor connection between MW-3 and MW-4 does not exist (see Figure 1); however, the sewer and water utility service to the property building enters from the east and the upgradient side of the property. The groundwater at the property is shallow (generally between 5 and 7 feet below top of well casing during the December 2016 sampling event) which could be impact by a nearby sewer utility trench. The measured groundwater elevations are not significantly different from the previous sampling events, which do not indicate that groundwater elevation fluctuations are influencing the newly identified onsite MTBE concentrations.

ATC also submitted a field blank and duplicate sample for quality assurance/quality control purposes. The field blank sample did not indicate laboratory detectable concentrations of VOCs. The duplicate sample was collected from well MW-3. The relative percent difference (RPD) was calculated for each parameter with a goal of less than a 20% RPD for each parameter. The RPD for ethylbenzene was calculated to be 24% which exceeds the goal; however, the analytical results were similar to historical results and remained below the VT GES. The remaining parameters were below 10% RPD including the parameters that exceeded the VT GES. The QA/QC samples did not appear to negatively affect the usability of the data.



The groundwater sampling laboratory analysis results are presented in Table 1. A hardcopy of laboratory results are included as Appendix A. The depth to groundwater measurements are presented in Table 2, and a groundwater contour map is presented as Figure 2.



3 Conclusions and Recommendations

3.1 Conclusions Based on the results of the groundwater sampling conducted at the 172 South Main Street property in St. Albans, VT, ATC presents the following conclusions:

• Based on groundwater elevation measurements, the groundwater flow direction appears to be toward the northwest. The measured groundwater elevations were near historically high levels, and were higher than the elevations reported in each well during the December 2014 sampling event. ATC and the VTDEC were anticipating the groundwater elevations to be depressed in December which would correspond with previous sampling conducted in December.

• Groundwater sampling results indicated VOC concentrations slightly exceeded the Vermont Groundwater Enforcement Standard (VT GES) in monitoring well MW-3. The concentrations in monitoring well MW-3 slightly increased from the previous sampling event, but remained significantly less than sampling events in 2014 and 2015. The total VOC concentrations generally continued to indicate decreasing concentrations in the remaining monitoring wells. MTBE was detected in monitoring well MW-4; however, the concentration remained below the VT GES. The MTBE is potentially migrating from an offsite source.

3.2 Recommendations ATC offers the following recommendations based on the results of the groundwater sampling:

• Based on the low and generally decreasing VOC concentrations reported at the site and low risk to

sensitive receptors, the site could be considered by the VT DEC for a Site Management Activity Completed designation with a Notice to Land Records to document low level residual subsurface petroleum contamination. However, if additional data is desired to characterize the groundwater contamination, ATC recommends a round of groundwater sampling from the onsite monitoring wells in the fall of 2017.



4 Qualifications

The work performed in conjunction with this assessment, and the data developed, are intended as a description of available information at the dates and locations given. The passage of time may result in a change in the environmental characteristics at this property and surrounding properties. This report does not warrant against future operations or conditions, nor does it warrant operations or conditions present of a type or at a location not investigated.

The present study included collecting four (4) groundwater samples. The conclusions drawn from this investigation are considered reliable; however, localized variations in subsurface conditions may exist that have not been completely defined at this time.

Our professional services have been performed, our findings obtained, and our recommendations prepared in accordance with customary principles and practices in the fields of environmental science and engineering. This warranty is in lieu of all other warranties either expressed or implied. ATC is not responsible for the independent conclusions, opinions, or recommendations made by others based on the results and designs presented in this report.

The passage of time may result in a change in the environmental characteristics at this property and surrounding properties. This report does not warrant against future operations or conditions, nor does it warrant operations or conditions present of a type or at a location not investigated.

It must be noted that no investigation can absolutely rule out the existence of any hazardous materials at a given property. This assessment has been based upon prior property history. Existing hazardous materials and contaminants can escape detection using these methods. If a higher level of confidence is required than can be defined by this scope of work, then additional investigation would, of course, be required.



5 Reliance

This report is for the use and benefit of, and may be relied upon by New England Federal Credit Union, and any affiliates and third parties authorized in writing by New England Federal Credit Union and ATC, including the lender(s) in connection with a secured financing of the property, and their respective successors and assigns. Any third party agrees by accepting this report that any use or reliance on this report shall be limited by the exceptions and limitations in this report, and with the acknowledgment that actual property conditions may change with time, and that hidden conditions may exist at the property that were not discovered within the authorized scope of the assessment. Any use by or distribution of this report to third parties, without the express written consent of ATC, is at the sole risk and expense of such third party.

ATC makes no other representation to any third party except that it has used the degree of care and skill ordinarily exercised by environmental consultants in the preparation of the report and in the assembling of data and information related thereto. No other warranties are made to any third party, either expressed or implied. Unless otherwise agreed upon in writing by ATC and a third party, ATC’s liability to any third party authorized to use or rely on this report with respect to any acts or omissions shall be limited to a total maximum amount of $100,000.

Respectfully Submitted,

ATC Group Services LLC

Adam Forman Thomas J. Broido Project Geologist Branch Manager for ATC for ATC Direct Line +1 802.862.1980 Direct Line +1 802.862.1980 Email: [email protected] Email: [email protected]



TABLES

TABLE 1GROUNDWATER QUALITY DATANew England Federal Credit Union

172 South Main StreetSt. Albans, Vermont

VT DEC Site # 2014-4537

Page 1 of 1

1, 2 DIBROMO CHLORO ETHYL ISOPROPYL n-PROPYL 1,3,5, 1,2,4 sec-BUTYL 4-ISOPROPYL n-BUTYLSAMPLE SAMPLE ACETONE 2-BUTANONE BENZENE TOLUENE ETHANE BENZENE BENZENE TOTAL STYRENE BENZENE BENZENE TRIMETHYL TRIMETHYL BENZENE TOLUENE BENZENE NAPHTHALENE MTBE

LOCATION DATE (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) XYLENES (ug/L) (ug/L) (ug/L) BENZENE BENZENE (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) TOTAL VOCs

MW-1 12/5/2014 <10 <10 <10 <10 <10 <10 24.0 11 <10 45 140 350 250 12 8.5 19 43 <1.0 902.55/8/2015 NA NA <1.0 <1.0 NA NA <1.0 <2.0 NA NA NA 1.9 <1.0 NA NA NA <2.0 <2.0 1.9

11/10/2015 NA NA <1.0 <1.0 NA NA 1.7 <2.0 NA NA NA 14.4 7.9 NA NA NA 3 <2.0 27.05/24/2016 NA NA <1.0 <1.0 NA NA 3.3 <2.0 NA NA NA 7.2 5.3 NA NA NA <2.0 <2.0 15.8

12/13/2016 NA NA <1.0 <1.0 NA NA <1.0 <2.0 NA NA NA <1.0 <1.0 NA NA NA <2.0 <2.0 ND

MW-2 12/5/2014 <10 <10 <10 <10 <10 <10 150.0 33 <10 83 310 850 2900 35 21 56 280 <10 4718.05/8/2015 NA NA <1.0 <1.0 NA NA <5.0 5.8 NA NA NA 29.4 18.1 NA NA NA 2.3 <2.0 55.6

11/10/2015 NA NA <5.0 <5.0 NA NA 6.8 14 NA NA NA 99.7 135 NA NA NA 11.8 <10 267.35/24/2016 NA NA <5.0 <5.0 NA NA 6.4 <5.0 NA NA NA 38.9 113 NA NA NA <10 <10 158.3

12/13/2016 NA NA <1.0 <1.0 NA NA <1.0 <2.0 NA NA NA 6.4 11.4 NA NA NA <2.0 <2.0 17.8

MW-3 12/5/2014 74 32 24 760 <10 <10 740 2610 5.5 33 72 160 450 <10 8.4 <10 89 <1.0 5057.95/8/2015 NA NA <1.0 59.2 NA NA 193 1090 NA NA NA 116 325 NA NA NA 35.4 <2.0 1818.6

11/10/2015 NA NA <5.0 73 NA NA 233 888 NA NA NA 150 367 NA NA NA 41.5 18.3 1770.85/24/2016 NA NA <1.0 6.3 NA NA 40.2 102 NA NA NA 50.7 114 NA NA NA 16.5 8.8 338.5

12/13/2016 NA NA <5.0 <5.0 NA NA 134 70.4 NA NA NA 88.6 281 NA NA NA 39 <10 613.0

MW-4 12/5/2014 <10 <10 1.2 7.9 <10 7.1 9.5 32.1 <10 1.1 2.5 7.3 19 4.8 <10 <10 7 <1.0 99.55/8/2015 NA NA 4.4 1 NA NA 1.3 4.1 NA NA NA <1.0 1.3 NA NA NA <2.0 8.6 20.7

11/10/2015 NA NA 11.1 1.8 NA NA 1 2.8 NA NA NA <1.0 1.3 NA NA NA <2.0 13.3 31.35/24/2016 NA NA <1.0 <1.0 NA NA <1.0 <2.0 NA NA NA <1.0 <1.0 NA NA NA <2.0 5.3 5.3

12/13/2016 NA NA 2.4 <1.0 NA NA <1.0 <2.0 NA NA NA <1.0 <1.0 NA NA NA <2.0 3.2 5.6

Field Blank 12/5/2014 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <1.0 ND5/8/2015 NA NA <1.0 <1.0 NA NA <1.0 <2.0 NA NA NA <1.0 <1.0 NA NA NA <2.0 <2.0 ND

11/10/2015 NA NA <1.0 <1.0 NA NA <1.0 <2.0 NA NA NA <1.0 <1.0 NA NA NA <2.0 <2.0 ND5/24/2016 NA NA <1.0 <1.0 NA NA <1.0 <2.0 NA NA NA <1.0 <1.0 NA NA NA <2.0 <2.0 ND

700 NA 5 1000 NA 100 700 10,000 100 NA NA 350 350 NA NA NA 20 40Notes:Non-listed volatile organic compounds reported concentrations below laboratory detection limits.Shade areas indicate enforcement standard exceedances.NA - Not ApplicableNS - Not Sampled1,3,5-Trimethylbenzene and 1,2,4-Trimethylbenzene Enforcement Standards are a combined total of 350 ug/L.

Duplicate SampleETHYL 1,3,5- 1,2,4- NAPHTH-

SAMPLE SAMPLE BENZENE TOLUENE BENZENE TOTAL TRIMETHYL TRIMETHYL ALENE MTBELOCATION DATE (ug/L) (ug/L) (ug/L) XYLENES BENZENE BENZENE (ug/L) (ug/L)

MW-3 12/13/2016 <5.0 <5.0 134 70.4 88.6 281 39 <10Dup of MW-3 12/13/2016 <5.0 <5.0 105 66.4 92.7 270 35.5 <10

RPD NA NA -24.3 -5.8 4.5 -4.0 -9.4 NA

Notes: RPD - Relative Percent Difference

Enforcement Standard

TABLE 2GROUNDWATER ELEVATION DATA

New England Federal Credit Union172 South Main StreetSt. Albans, Vermont

VT DEC SMS Site # 2014-4537

SAMPLE SAMPLE WELL ELEVATION DEPTH TO GROUNDWATERLOCATION DATE TOC (ft.) GROUNDWATER (ft.) ELEVATION (ft.)

MW-1 12/5/14 94.38 5.92 88.465/8/15 5.00 89.38

11/10/15 5.75 88.635/24/16 5.32 89.06

12/13/16 5.06 89.32

MW-2 12/5/14 94.35 6.31 88.045/8/15 5.16 89.19

11/10/15 5.91 88.445/24/16 5.45 88.90

12/13/16 5.22 89.13

MW-3 12/5/14 94.33 7.18 87.155/8/15 5.67 88.66

11/10/15 6.59 87.745/24/16 5.67 88.66

12/13/16 5.61 88.72

MW-4 12/5/14 90.55 8.71 81.845/8/15 6.63 83.92

11/10/15 7.52 83.035/24/16 7.62 82.93

12/13/16 7.03 83.52

Table 3Natural Attenuation Parameters

NEFCU172 St. Albans, Vermont

ATC Project Number 280EM00049Page 1

Well Date Time pH Conductivity (S/cm) DO (mg/L) Temp (Cel) ORP (mV)

MW-1 12/05/14 9:41 7.68 0.003 2.41 8.00 -71.205/08/15 12:50 7.94 0.003 1.80 13.90 159.611/10/15 9:19 7.68 0.003 3.27 13.50 225.305/24/16 10:51 7.59 0.004 1.06 12.60 369.412/13/16 9:40 7.22 0.003 2.60 9.60 -196.1

MW-2 12/05/14 10:00 7.13 0.088 3.73 8.90 -30.205/08/15 13:14 6.97 0.019 1.16 13.50 79.111/10/15 9:53 7.17 0.006 0.41 14.80 -79.405/24/16 11:20 7.11 0.012 0.28 14.90 202.112/13/16 9:58 7.44 0.009 0.35 10.80 -234.5

MW-3 12/05/14 10:24 7.34 0.095 1.15 7.20 6.205/08/15 13:32 7.42 0.009 1.02 13.90 -1.911/10/15 10:15 7.37 0.009 1.06 13.10 -38.505/24/16 11:40 7.39 0.008 0.30 13.30 178.512/16/16 10:18 7.73 0.003 1.19 8.30 -233.4

MW-4 12/05/14 10:49 7.00 0.024 3.69 9.10 11.305/08/15 13:51 7.23 0.002 1.26 13.60 -49.511/10/15 10:40 6.84 0.003 0.39 14.90 -51.705/24/16 12:38 7.17 0.001 0.24 14.20 -41.112/13/16 10:58 7.12 0.001 0.16 10.90 -229.7

Notes:ORP - Oxidation Reduction Potential NM - Not Measured DO - Dissolved OxygenS/cm - Siemens per centimeter mg/L - milligrams per liter Cel - CelsiusmV - millivolts



FIGURES

Property Plan - NEFCU

172 South Main Street

St. Albans, VT

280EM00049

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171 Commerce Street, P.O Box 1486

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APPENDIX A GROUNDWATER LABORATORY REPORT

Laboratory Report

NEFCUPROJECT:

DATE RECEIVED:

WORK ORDER:

DATE REPORTED:

100043ATC Group Services

PO Box 1486

Williston, VT 05495

Atten: Adam Forman SAMPLER:

December 16, 2016

1612-28235

Adam Foreman

December 13, 2016

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

ATC Group Services

Page 2 of 3

CLIENT:PROJECT: NEFCU

WORK ORDER:DATE RECEIVED:

1612-2823512/13/2016

12/16/2016REPORT DATE:

001 Date Sampled: 12/13/16Site: MW-1 12/14/16 EEPWAnalysis Date:09:40

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TEST METHOD: EPA 8021B

< 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

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


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< 2.0 NXylenes, Total ug/L 6.4 N1,3,5-Trimethylbenzene ug/L

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



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< 5.0 NToluene ug/L 134 NEthylbenzene ug/L

70.4 NXylenes, Total ug/L 88.6 N1,3,5-Trimethylbenzene ug/L

281 N1,2,4-Trimethylbenzene ug/L 39.0 NNaphthalene ug/L



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3.2 NMethyl-t-butyl ether (MTBE) ug/L 2.4 DS-NBenzene ug/L





005 Date Sampled: 12/13/16Site: Duplicate 12/14/16 EEPWAnalysis Date:10:20

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< 5.0 NToluene ug/L 105 NEthylbenzene ug/L

66.4 NXylenes, Total ug/L 92.7 N1,3,5-Trimethylbenzene ug/L

270 N1,2,4-Trimethylbenzene ug/L 35.5 NNaphthalene ug/L


Laboratory Report

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Page 3 of 3

CLIENT:PROJECT: NEFCU

WORK ORDER:DATE RECEIVED:

1612-2823512/13/2016

12/16/2016REPORT DATE:

006 Date Sampled: 12/13/16Site: Field Blank 12/14/16 EEPWAnalysis Date:11:00

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114 NSurr. 1 (Bromobenzene) % 0 NUnidentified Peaks

Report Summary of Qualifiers and Notes

DS-: The Laboratory Duplicate analysis of this sample was not within method acceptance limits. The value of the

Laboratory Duplicate was 1.7ug/L.

Method 8021B: Sample 003: Disparate results were observed between replicate vials submitted for analysis. Results

from the second vial were significantly lower than reported values. Reported results are from a sample container

with significant headspace, values may be biased low.

Method 8021B: Sample 005: Disparate results were observed between replicate vials submitted for analysis. Results

from the second vial were significantly lower than reported values.

december 2016 groundwater sampling report · december 2016 groundwater sampling report nefcu st....

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