Task 240 - Water Quality Monitoring Evaluation Report.pdf

355 Research Parkway ▪ Meriden, CT 06450 ▪ T (203) 630-1406 ▪ F (203) 630-2615 ▪ www.blcompanies.com

April 17, 2025

Mr. Jason Coite, P.E.

Division of Environmental Compliance Connecticut Department of Transportation P.O. Box 317546 Newington, CT 06131-7546

Attention: Mr. Michael Bedson, P.E. / Ms. Nicole Ianniello

Re: Task 240 – Water Quality Monitoring Evaluation Report Farmington Canal Heritage Trail – Phase 2 Plainville, Connecticut State Project No. 109-0173, Assignment No. 323-8325 BL Companies Project No. 2301674.0211

Dear Mr. Coite:

BL Companies has prepared this letter report to summarize the sampling of the existing monitoring well located within the Project limits at Station 217+65. The project’s location and pertinent features, including the monitoring well location, are depicted on the enclosed Site Location Map (Figure 1) and Monitoring Well Location Plan (ENV-01).

On March 14, 2025, BL Companies collected a groundwater sample, identified as MW-100, from the existing monitoring well using low-flow sampling techniques. The groundwater sample was submitted to Phoenix Environmental Laboratories (Phoenix) for laboratory analysis including extractable total petroleum hydrocarbons (ETPH) by CT ETPH method, volatile organic compounds (VOCs) by EPA Method 624.1, semi-volatile organic compounds (SVOCs) by EPA Method 625.1, polychlorinated biphenyls (PCBs) by EPA Method 608.3, pesticides by EPA Method 8081, and total and dissolved Resource Conservation and Recovery Act (RCRA) 8 metals including copper and zinc by EPA method 200.7/245.1.

Groundwater analytical results are summarized in Table 1 along with the applicable Connecticut Department of Energy and Environmental Protection (CTDEEP) General Permit Discharge Maximum Concentration Limits (MCLs). ETPH, VOCs, SVOCs, pesticides, and PCBs were all below the laboratory reporting limits. Total/dissolved barium and dissolved zinc were detected at concentrations below the MCLs.

A laboratory-prepared trip blank sample accompanied the sample containers from the laboratory, to the Site, and back to the laboratory. The purpose of the trip blank sample is to evaluate the potential for cross-contamination during transport. The trip blank sample was analyzed for VOCs only. VOCs were not detected in the trip blank, indicating that there was likely no cross-contamination of the sample during transport.

An Employee-Owned Company

CTDOT Project No. 0109-0176 April 17, 2025

Based on the groundwater analytical results for MW-100, if groundwater is encountered during construction, any dewatering associated with the construction shall be performed in accordance with the CTDEEP’s “General Permit for the Discharge of Stormwater and Dewatering Wastewaters Associated with Construction Activities.”

If you have any questions or require additional clarification, please contact me at your earliest convenience.

Sincerely, BL Companies

Joy Kloss, LEP, CHMM Senior Project Manager

Enclosures:

Figure 1: Site Location Map ENV-01: Monitoring Well Location Plan Table 1: Groundwater Analytical Results Phoenix Laboratory Analytical Report dated 3/21/25

PROJECT

CORRIDOR

Project No.

2301674.0211

Base map is a reproduction of the USGS 7.5 Minute Bristol Quadrangle

SITE LOCATION MAP

Farmington Heritage Canal Trail – Phase 2

Plainville, CT

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PROJECT DESCRIPTION:

PROJECT NUMBER: DRAWING NO.

SHEET NO.

7/18/2024

C

ONNECTICU

T

D E

P A

R T

M E

N T

O F TRAN

S

P O

R T

A T I

O N

STATE OF CONNECTICUT

TRANSPORTATION

OF

DEPARTMENT

BLOCK:

SIGNATURE/

DRAWING TITLE: PLAN SHEETS

PLN-05

TOWN(S):

DESIGNER/DRAFTER: S. SHUKLA CHECKED BY: W. HOGAN

0109-0176

PLAINVILLE

FARMINGTON CANAL HERITAGE TRAIL - ROUTE 72 TO NORTHWEST DRIVE

PLOTTED DATE:

C:\Users\Shuklas\State of Connecticut\0109-0176 - Design\Highways\Contract_Plans\Plans in Hand (PIH)\HW_CP_0109-0176_PLN_5-6-24.dgnFILE NAME: ShuklaS LASTED SAVED BY:

1" = 40'

HORIZONTAL SCALE

40' 80'

110 FT - REMOVE CHAIN LINK FENCE

29 FT - REMOVE GATE (PAID UNDER "REMOVE CHAIN LINK FENCE")

24 FT - THREE RAIL WOOD FENCE

24 FT - THREE RAIL WOOD FENCE

560 FT - THREE RAIL WOOD FENCE

24 FT - THREE RAIL WOOD FENCE

BRIDGE STRUCTURE #1 (SEE STRUCTURES SHEETS)

/1

CO

O

RD

IN

ATE

G

RI

D

CO

N

ECTI

CU

25 S.Y. - WETLAND GRASS ESTABLISHMENT

NOTE:

BOUNDARY MARKER (SURVEY MONUMENT) (SEE SPECIAL PROVISIONS).

TO BE REPLACED OR RESET, AS DIRECTED BY THE ENGINEER, UNDER PAY ITEM CTDOT

EXISTING SURVEY BOUNDARY MONUMENTS DISTURBED BY CONSTRUCTION ACTIVITIES

END 14 FT TRAIL WIDTH STA 213+50

ACCESS ROAD (SEE TYP-03)

TEMPORARY CONSTRUCTION

(SEE MDS-01) (CHICANE STYLE)GATE -

190 FT - THREE RAIL WOOD FENCE

62 FT - THREE RAIL WOOD FENCE

36 FT - THREE RAIL WOOD FENCE

110 FT - 6' CHAIN LINK FENCE

RESET MANHOLE (SANITARY SEWER)

RESET MANHOLE (SANITARY SEWER)

RESET MANHOLE (SANITARY SEWER)(SANITARY SEWER)

RESET MANHOLE

RESET MANHOLE (SANITARY SEWER)

SEE SPECIAL PROVISION 1507000A FOR DETAIL (TYP.)

PROTECTION AND SUPPORT OF EXISTING UTILITIES

BENCH

PUBLIC INFORMATION SIGN

PICNIC TABLE

PICNIC TABLE

PUBLIC INFORMATION SIGN

BENCH

BENCH

BIKE RACK

16 FT CHAIN LINK DOUBLE GATE 5' HIGH

BIKE RACK

LEGEND:

CHAIN LINK FENCE

THREE RAIL WOOD FENCE

SEDIMENTATION CONTROL SYSTEM

100-YEAR FLOOD (CALCULATED)

APPROX. SLOPE LIMITS

310 S.Y. - BITUMINOUS CONCRETE DRIVEWAY (COMMERCIAL)

144 FT - THREE RAIL WOOD FENCE

MW-100

ENV-01

MONITORING WELL LOCATION PLAN

Table 1 Groundwater Analytical Results

Farmington Canal Heritage Trail - Phase 2 Plainville, CT

Field ID MW-100 TRIP BLANK Date 3/14/2025 3/14/2025

Parmeters Unit CTDEEP General Permit MCL

- Surface Water CTDEEP General Permit MCL

- Sanitary Sewer

CTETPH

Ext. Petroleum H.C. (C9-C36) mg/L 5 100 ND<0.066 NA Total VOCs

VOCs µg/L 10 5,000 ND ND Total SVOCs

SVOCs µg/L Various Various ND NA Total Metals

Barium mg/L #1 5 0.040 NA Total Dissolved Metals

Barium mg/L #1 5 0.040 NA Zinc mg/L 0.322 1 0.003 NA

Total Pesticides Pesticides µg/L Various Various ND NA

Total PCBs PCBs µg/L 0.00017 1 ND<0.096 NA

Only detected compounds listed CT DEEP = Connecticut Department of Energy and Environmental Protection MCL = maximum concentration limits listed in the DEEP General Permit for Discharge of Groundwater µg/L = micrograms per Liter = parts per billion mg/L = milligrams per Liter = parts per million NA = Not Analyzed #1 = Criteria not established Shaded & Bold = Exceeds MCL

BL Project No. 2301674.0211 1 of 1 4/23/2025

CS80267 - CS80268

Friday, March 21, 2025

Sample ID#s:

Attn: Joy Kloss BL Companies, Inc.

355 Research Parkway Meriden, CT 06450

SDG ID: GCS80267

Project ID: 2301674.0211

Sincerely yours, Laboratory Director Phyllis Shiller

The contents of this report cannot be discussed with anyone other than the client listed above without their written consent.

NELAC - #NY11301

CT Lab Registration #PH-0618 MA Lab Registration #M-CT007 ME Lab Registration #CT-007 NH Lab Registration #213693-A,B

NJ Lab Registration #CT-003 NY Lab Registration #11301 PA Lab Registration #68-03530 RI Lab Registration #63 VT Lab Registration #VT11301

This laboratory is in compliance with the NELAC requirements of procedures used except where indicated.

This report contains results for the parameters tested, under the sampling conditions described on the Chain Of Custody, as received by the laboratory. This report is incomplete unless all pages indicated in the pagination at the bottom of the page are included.

A scanned version of the COC form accompanies the analytical report and is an exact duplicate of the original.

587 East Middle Turnpike, P.O. Box 370, Manchester, CT 06040

Sample Id Cross Reference March 21, 2025

587 East Middle Turnpike, P.O.Box 370, Manchester, CT 06045 Tel. (860) 645-1102 Fax (860) 645-0823

Environmental Laboratories, Inc.

SDG I.D.: GCS80267

Client Id Lab Id Matrix

Project ID: 2301674.0211

Col Date

MW-100 CS80267 GW DISCHARGE 03/14/25 11:45

TRIP BLANK CS80268 WATER 03/14/25 0:00

Sample Information Custody Information Matrix:

Location Code:

Rush Request:

P.O.#:

Collected by:

Received by:

Analyzed by:

GW DISCHARGE

BLCOMP-DAS

Standard 2301674.0211

03/14/25

SR1

see "By" below

JC

Laboratory Data

MW-100

Phoenix ID: CS80267

03/14/25 11:45 13:55

Parameter Result

RL/

PQL Units Date/Time By Reference

FOR: Attn: Joy Kloss BL Companies, Inc.

355 Research Parkway Meriden, CT 06450

Analysis Report March 21, 2025

Date Time

SDG ID: GCS80267

Client ID:

Project ID: 2301674.0211

Dilution

587 East Middle Turnpike, P.O.Box 370, Manchester, CT 06045 Tel. (860) 645-1102

Environmental Laboratories, Inc.

< 0.001Silver 0.001 03/19/25 TH E200.7mg/L 1 < 0.002Arsenic 0.002 03/19/25 TH E200.7mg/L 1 0.040Barium 0.001 03/19/25 TH E200.7mg/L 1

< 0.001Cadmium 0.001 03/19/25 TH E200.7mg/L 1 < 0.001Chromium 0.001 03/19/25 TH E200.7mg/L 1 < 0.003Copper 0.003 03/19/25 TH E200.7mg/L 1 < 0.001Silver (Dissolved) 0.001 03/17/25 CPP E200.7mg/L 1 < 0.004Arsenic (Dissolved) 0.004 03/17/25 CPP E200.7mg/L 1 0.040Barium (Dissolved) 0.002 03/17/25 CPP E200.7mg/L 1

< 0.001Cadmium (Dissolved) 0.001 03/17/25 CPP E200.7mg/L 1 < 0.001Chromium (Dissolved) 0.001 03/17/25 CPP E200.7mg/L 1 < 0.005Copper (Dissolved) 0.005 03/17/25 CPP E200.7mg/L 1

< 0.0002Mercury (Dissolved) 0.0002 03/18/25 JM E245.1mg/L 1 < 0.002Lead (Dissolved) 0.002 03/17/25 CPP E200.7mg/L 1 < 0.011Selenium (Dissolved) 0.011 03/17/25 CPP E200.7mg/L 1 0.003Zinc (Dissolved) 0.002 03/17/25 CPP E200.7mg/L 1

< 0.0002Mercury 0.0002 03/18/25 ZT E245.1mg/L 1 < 0.001Lead 0.001 03/19/25 TH E200.7mg/L 1 < 0.005Selenium 0.005 03/19/25 TH E200.7mg/L 1 < 0.002Zinc 0.002 03/19/25 CPP E200.7mg/L 1

CompletedExtraction of ETPH 03/18/25 L/MQ SW3510C/SW3520C

CompletedMercury Dissolved Digestion 03/18/25 AK/AK E245.1 CompletedMercury Digestion 03/17/25 AK/AK E245.1 CompletedPCB Extraction 03/14/25 A/A SW3510C CompletedExtraction for Pest (LDL) 03/14/25 A/A SW3510C CompletedSemi-Volatile Extraction 03/17/25 L/MQ SW3520C CompletedDissolved Metals Preparation 03/14/25 AG SW3005A

Ver 1

MW-100

Phoenix I.D.: CS80267

Client ID:

2301674.0211Project ID:

Parameter Result

RL/

PQL Units Date/Time ByDilution Reference

CompletedTotal Metals Digestion 03/18/25 AG E200.7

TPH by GC (Extractable Products) NDExt. Petroleum H.C. (C9-C36) 0.066 03/19/25 JRB CTETPHmg/L 1 NDIdentification 03/19/25 JRB CTETPHmg/L 1

QA/QC Surrogates 68% Terphenyl (surr) 03/19/25 JRB 50 - 150 %% 1

Polychlorinated Biphenyls NDPCB-1016 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1221 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1232 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1242 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1248 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1254 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1260 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1262 0.096 03/17/25 SC E608.3ug/L 1 NDPCB-1268 0.096 03/17/25 SC E608.3ug/L 1

QA/QC Surrogates

87% DCBP 03/17/25 SC 30 - 150 %% 1

80% DCBP (Confirmation) 03/17/25 SC 30 - 150 %% 1

76% TCMX 03/17/25 SC 30 - 150 %% 1

70% TCMX (Confirmation) 03/17/25 SC 30 - 150 %% 1

Pesticides ND4,4' -DDD 0.048 03/18/25 AW SW8081Bug/L 1 ND4,4' -DDE 0.048 03/18/25 AW SW8081Bug/L 1 ND4,4' -DDT 0.048 03/18/25 AW SW8081Bug/L 1 NDa-BHC 0.024 03/18/25 AW SW8081Bug/L 1 NDAlachlor 0.072 03/18/25 AW SW8081Bug/L 1 NDAldrin 0.001 03/18/25 AW SW8081Bug/L 1 NDb-BHC 0.005 03/18/25 AW SW8081Bug/L 1 NDChlordane 0.29 03/18/25 AW SW8081Bug/L 1 NDd-BHC 0.024 03/18/25 AW SW8081Bug/L 1 NDDieldrin 0.020 03/18/25 AW SW8081Bug/L 1 NDEndosulfan I 0.048 03/18/25 AW SW8081Bug/L 1 NDEndosulfan II 0.048 03/18/25 AW SW8081Bug/L 1 NDEndosulfan Sulfate 0.048 03/18/25 AW SW8081Bug/L 1 NDEndrin 0.048 03/18/25 AW SW8081Bug/L 1 NDEndrin Aldehyde 0.048 03/18/25 AW SW8081Bug/L 1 NDEndrin ketone 0.048 03/18/25 AW SW8081Bug/L 1 NDg-BHC (Lindane) 0.024 03/18/25 AW SW8081Bug/L 1 NDHeptachlor 0.024 03/18/25 AW SW8081Bug/L 1 NDHeptachlor epoxide 0.024 03/18/25 AW SW8081Bug/L 1 NDMethoxychlor 0.096 03/18/25 AW SW8081Bug/L 1 NDToxaphene 0.96 03/18/25 AW SW8081Bug/L 1

QA/QC Surrogates 58%DCBP (Surrogate Rec) 03/18/25 AW 30 - 150 %% 1 52%DCBP (Surrogate Rec) (Confirmation) 03/18/25 AW 30 - 150 %% 1 55%TCMX (Surrogate Rec) 03/18/25 AW 30 - 150 %% 1

Client ID:

2301674.0211Project ID:

Parameter Result

RL/

PQL Units Date/Time ByDilution Reference

68%TCMX (Surrogate Rec) (Confirmation) 03/18/25 AW 30 - 150 %% 1

Volatiles ND1,1,1,2-Tetrachloroethane 1.0 03/18/25 MH E624.1ug/L 1 ND1,1,1-Trichloroethane 1.0 03/18/25 MH E624.1ug/L 1 ND1,1,2,2-Tetrachloroethane 0.50 03/18/25 MH E624.1ug/L 1 ND1,1,2-Trichloroethane 1.0 03/18/25 MH E624.1ug/L 1 ND1,1-Dichloroethane 1.0 03/18/25 MH E624.1ug/L 1 ND1,1-Dichloroethene 1.0 03/18/25 MH E624.1ug/L 1 ND1,1-Dichloropropene 1.0 03/18/25 MH E624.1ug/L 1 ND1,2,3-Trichlorobenzene 1.0 03/18/25 MH E624.1ug/L 1 ND1,2,3-Trichloropropane 1.0 03/18/25 MH E624.1ug/L 1 ND1,2,4-Trichlorobenzene 1.0 03/18/25 MH E624.1ug/L 1 ND1,2,4-Trimethylbenzene 1.0 03/18/25 MH E624.1ug/L 1 ND1,2-Dibromo-3-chloropropane 1.0 03/18/25 MH E624.1ug/L 1 ND1,2-Dibromoethane 1.0 03/18/25 MH E624.1ug/L 1 ND1,2-Dichlorobenzene 1.0 03/18/25 MH E624.1ug/L 1 ND1,2-Dichloroethane 0.60 03/18/25 MH E624.1ug/L 1 ND1,2-Dichloropropane 1.0 03/18/25 MH E624.1ug/L 1 ND1,3,5-Trimethylbenzene 1.0 03/18/25 MH E624.1ug/L 1 ND1,3-Dichlorobenzene 1.0 03/18/25 MH E624.1ug/L 1 ND1,3-Dichloropropane 1.0 03/18/25 MH E624.1ug/L 1 ND1,4-Dichlorobenzene 1.0 03/18/25 MH E624.1ug/L 1 ND2,2-Dichloropropane 1.0 03/18/25 MH E624.1ug/L 1 ND2-Chlorotoluene 1.0 03/18/25 MH E624.1ug/L 1 ND2-Hexanone 5.0 03/18/25 MH E624.1ug/L 1 ND2-Isopropyltoluene 1.0 03/18/25 MH E624.1ug/L 1 ND4-Chlorotoluene 1.0 03/18/25 MH E624.1ug/L 1 ND4-Methyl-2-pentanone 5.0 03/18/25 MH E624.1ug/L 1 NDAcetone 25 03/18/25 MH E624.1ug/L 1 NDAcrylonitrile 1.0 03/18/25 MH E624.1ug/L 1 NDBenzene 0.70 03/18/25 MH E624.1ug/L 1 NDBromobenzene 1.0 03/18/25 MH E624.1ug/L 1 NDBromochloromethane 1.0 03/18/25 MH E624.1ug/L 1 NDBromodichloromethane 0.50 03/18/25 MH E624.1ug/L 1 NDBromoform 1.0 03/18/25 MH E624.1ug/L 1 NDBromomethane 1.0 03/18/25 MH E624.1ug/L 1 NDCarbon Disulfide 5.0 03/18/25 MH E624.1ug/L 1 NDCarbon tetrachloride 1.0 03/18/25 MH E624.1ug/L 1 NDChlorobenzene 1.0 03/18/25 MH E624.1ug/L 1 NDChloroethane 1.0 03/18/25 MH E624.1ug/L 1 NDChloroform 1.0 03/18/25 MH E624.1ug/L 1 NDChloromethane 1.0 03/18/25 MH E624.1ug/L 1 NDcis-1,2-Dichloroethene 1.0 03/18/25 MH E624.1ug/L 1 NDcis-1,3-Dichloropropene 0.40 03/18/25 MH E624.1ug/L 1 NDDibromochloromethane 0.50 03/18/25 MH E624.1ug/L 1 NDDibromomethane 1.0 03/18/25 MH E624.1ug/L 1 NDDichlorodifluoromethane 1.0 03/18/25 MH E624.1ug/L 1 NDEthylbenzene 1.0 03/18/25 MH E624.1ug/L 1 NDHexachlorobutadiene 0.40 03/18/25 MH E624.1ug/L 1

Client ID:

2301674.0211Project ID:

Parameter Result

RL/

PQL Units Date/Time ByDilution Reference

NDIsopropylbenzene 1.0 03/18/25 MH E624.1ug/L 1 NDm&p-Xylene 1.0 03/18/25 MH E624.1ug/L 1 NDMethyl ethyl ketone 5.0 03/18/25 MH E624.1ug/L 1 NDMethyl t-butyl ether (MTBE) 1.0 03/18/25 MH E624.1ug/L 1 NDMethylene chloride 1.0 03/18/25 MH E624.1ug/L 1 NDNaphthalene 1.0 03/18/25 MH E624.1ug/L 1 NDn-Butylbenzene 1.0 03/18/25 MH E624.1ug/L 1 NDn-Propylbenzene 1.0 03/18/25 MH E624.1ug/L 1 NDo-Xylene 1.0 03/18/25 MH E624.1ug/L 1 NDp-Isopropyltoluene 1.0 03/18/25 MH E624.1ug/L 1 NDsec-Butylbenzene 1.0 03/18/25 MH E624.1ug/L 1 NDStyrene 1.0 03/18/25 MH E624.1ug/L 1 NDtert-Butylbenzene 1.0 03/18/25 MH E624.1ug/L 1 NDTetrachloroethene 1.0 03/18/25 MH E624.1ug/L 1 NDTetrahydrofuran (THF) 2.5 03/18/25 MH E624.1ug/L 1 NDToluene 1.0 03/18/25 MH E624.1ug/L 1 NDTotal Xylenes 1.0 03/18/25 MH E624.1ug/L 1 NDtrans-1,2-Dichloroethene 1.0 03/18/25 MH E624.1ug/L 1 NDtrans-1,3-Dichloropropene 0.40 03/18/25 MH E624.1ug/L 1 NDtrans-1,4-dichloro-2-butene 5.0 03/18/25 MH E624.1ug/L 1 NDTrichloroethene 1.0 03/18/25 MH E624.1ug/L 1 NDTrichlorofluoromethane 1.0 03/18/25 MH E624.1ug/L 1 NDTrichlorotrifluoroethane 1.0 03/18/25 MH E624.1ug/L 1 NDVinyl chloride 1.0 03/18/25 MH E624.1ug/L 1

QA/QC Surrogates 103% 1,2-dichlorobenzene-d4 03/18/25 MH 70 - 130 %% 1 92% Bromofluorobenzene 03/18/25 MH 70 - 130 %% 1

106% Dibromofluoromethane 03/18/25 MH 70 - 130 %% 1 102% Toluene-d8 03/18/25 MH 70 - 130 %% 1

Oxygenates & Dioxane ND1,4-Dioxane 100 03/18/25 MH SW8260D (OXY)ug/L 1 NDDiethyl ether 1.0 03/18/25 MH SW8260D (OXY)ug/L 1 NDEthyl tert-butyl ether 1.0 03/18/25 MH SW8260D (OXY)ug/L 1 NDtert-amyl methyl ether 1.0 03/18/25 MH SW8260D (OXY)ug/L 1

Semivolatiles ND1,2,4,5-Tetrachlorobenzene 3.3 03/20/25 MR E625.1ug/L 1 ND1,2,4-Trichlorobenzene 4.8 03/20/25 MR E625.1ug/L 1 ND1,2-Dichlorobenzene 2.4 03/20/25 MR E625.1ug/L 1 ND1,2-Diphenylhydrazine 4.8 03/20/25 MR E625.1ug/L 1 ND1,3-Dichlorobenzene 2.4 03/20/25 MR E625.1ug/L 1 ND1,4-Dichlorobenzene 2.4 03/20/25 MR E625.1ug/L 1 ND2,2'-Oxybis(1-Chloropropane) 4.8 03/20/25 MR E625.1ug/L 1 ND2,4,5-Trichlorophenol 0.95 03/20/25 MR E625.1ug/L 1 ND2,4,6-Trichlorophenol 0.95 03/20/25 MR E625.1ug/L 1 ND2,4-Dichlorophenol 0.95 03/20/25 MR E625.1ug/L 1 ND2,4-Dimethylphenol 0.95 03/20/25 MR E625.1ug/L 1 ND2,4-Dinitrophenol 0.95 03/20/25 MR E625.1ug/L 1 ND2,4-Dinitrotoluene 4.8 03/20/25 MR E625.1ug/L 1

Client ID:

2301674.0211Project ID:

Parameter Result

RL/

PQL Units Date/Time ByDilution Reference

ND2,6-Dinitrotoluene 4.8 03/20/25 MR E625.1ug/L 1 ND2-Chloronaphthalene 4.8 03/20/25 MR E625.1ug/L 1 ND2-Chlorophenol 0.95 03/20/25 MR E625.1ug/L 1 ND2-Methylphenol (o-cresol) 0.95 03/20/25 MR E625.1ug/L 1 ND2-Nitroaniline 4.8 03/20/25 MR E625.1ug/L 1 ND2-Nitrophenol 0.95 03/20/25 MR E625.1ug/L 1 ND3&4-Methylphenol (m&p-cresol) 9.5 03/20/25 MR E625.1ug/L 1 ND3,3'-Dichlorobenzidine 4.8 03/20/25 MR E625.1ug/L 1 ND3-Nitroaniline 4.8 03/20/25 MR E625.1ug/L 1 ND4,6-Dinitro-2-methylphenol 0.95 03/20/25 MR E625.1ug/L 1 ND4-Bromophenyl phenyl ether 4.8 03/20/25 MR E625.1ug/L 1 ND4-Chloro-3-methylphenol 0.95 03/20/25 MR E625.1ug/L 1 ND4-Chloroaniline 4.8 03/20/25 MR E625.1ug/L 1 ND4-Chlorophenyl phenyl ether 0.95 03/20/25 MR E625.1ug/L 1 ND4-Nitroaniline 4.8 03/20/25 MR E625.1ug/L 1 ND4-Nitrophenol 0.95 03/20/25 MR E625.1ug/L 1 NDAcetophenone 4.8 03/20/25 MR E625.1ug/L 1 NDAniline 4.8 03/20/25 MR E625.1ug/L 1 NDBenzidine 4.8 03/20/25 MR E625.1ug/L 1 NDBenzoic acid 48 03/20/25 MR E625.1ug/L 1 NDBenzyl butyl phthalate 4.8 03/20/25 MR E625.1ug/L 1 NDBis(2-chloroethoxy)methane 4.8 03/20/25 MR E625.1ug/L 1 NDBis(2-chloroethyl)ether 0.95 03/20/25 MR E625.1ug/L 1 NDBis(2-ethylhexyl)phthalate 0.95 03/20/25 MR E625.1ug/L 1 NDCarbazole 4.8 03/20/25 MR E625.1ug/L 1 NDDibenzofuran 0.95 03/20/25 MR E625.1ug/L 1 NDDiethyl phthalate 4.8 03/20/25 MR E625.1ug/L 1 NDDimethylphthalate 4.8 03/20/25 MR E625.1ug/L 1 NDDi-n-butylphthalate 4.8 03/20/25 MR E625.1ug/L 1 NDDi-n-octylphthalate 4.8 03/20/25 MR E625.1ug/L 1 NDHexachloroethane 0.95 03/20/25 MR E625.1ug/L 1 NDIsophorone 4.8 03/20/25 MR E625.1ug/L 1 NDN-Nitrosodimethylamine 4.8 03/20/25 MR E625.1ug/L 1 NDN-Nitrosodi-n-propylamine 4.8 03/20/25 MR E625.1ug/L 1 NDN-Nitrosodiphenylamine 4.8 03/20/25 MR E625.1ug/L 1 NDPentachloronitrobenzene 2.4 03/20/25 MR E625.1ug/L 1 NDPhenol 0.95 03/20/25 MR E625.1ug/L 1

QA/QC Surrogates 55% 2,4,6-Tribromophenol 03/20/25 MR 15 - 110 %% 1 51% 2-Fluorobiphenyl 03/20/25 MR 30 - 130 %% 1 46% 2-Fluorophenol 03/20/25 MR 15 - 110 %% 1 50% Nitrobenzene-d5 03/20/25 MR 30 - 130 %% 1 50% Phenol-d5 03/20/25 MR 15 - 110 %% 1 54% Terphenyl-d14 03/20/25 MR 30 - 130 %% 1

Semivolatiles (SIM) ND2-Methylnaphthalene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDAcenaphthene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDAcenaphthylene 0.29 03/19/25 MR 625(SIM)ug/L 1 NDAnthracene 0.48 03/19/25 MR 625(SIM)ug/L 1

Client ID:

2301674.0211Project ID:

Parameter Result

RL/

PQL Units Date/Time ByDilution Reference

NDBenz(a)anthracene 0.05 03/19/25 MR 625(SIM)ug/L 1 NDBenzo(a)pyrene 0.19 03/19/25 MR 625(SIM)ug/L 1 NDBenzo(b)fluoranthene 0.07 03/19/25 MR 625(SIM)ug/L 1 NDBenzo(ghi)perylene 0.46 03/19/25 MR 625(SIM)ug/L 1 NDBenzo(k)fluoranthene 0.29 03/19/25 MR 625(SIM)ug/L 1 NDChrysene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDDibenz(a,h)anthracene 0.10 03/19/25 MR 625(SIM)ug/L 1 NDFluoranthene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDFluorene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDHexachlorobenzene 0.06 03/19/25 MR 625(SIM)ug/L 1 NDHexachlorobutadiene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDHexachlorocyclopentadiene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDIndeno(1,2,3-cd)pyrene 0.10 03/19/25 MR 625(SIM)ug/L 1 NDNaphthalene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDNitrobenzene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDPentachlorophenol 0.48 03/19/25 MR 625(SIM)ug/L 1 NDPhenanthrene 0.06 03/19/25 MR 625(SIM)ug/L 1 NDPyrene 0.48 03/19/25 MR 625(SIM)ug/L 1 NDPyridine 0.48 03/19/25 MR 625(SIM)ug/L 1

QA/QC Surrogates 56% 2,4,6-Tribromophenol 03/19/25 MR 15 - 110 %% 1 51% 2-Fluorobiphenyl 03/19/25 MR 30 - 130 %% 1 47% 2-Fluorophenol 03/19/25 MR 15 - 110 %% 1 56% Nitrobenzene-d5 03/19/25 MR 30 - 130 %% 1 55% Phenol-d5 03/19/25 MR 15 - 110 %% 1 57% Terphenyl-d14 03/19/25 MR 30 - 130 %% 1

Comments:

Per 1.4.6 of EPA method 8270D, 1,2-Diphenylhydrazine is unstable and readily converts to Azobenzene. Azobenzene is used for the calibration of 1,2-Diphenylhydrazine.

Dissolved analysis requires filtration. Samples submitted from a preserved container are assumed to be field filtered.

Phyllis Shiller, Laboratory Director March 21, 2025

If you are the client above and have any questions concerning this testing, please do not hesitate to contact Phoenix Client Services at ext.200.

The contents of this report cannot be discussed with anyone other than the client listed above without their written consent.

Reviewed and Released by: Ethan Lee, Project Manager

RL/PQL=Reporting/Practical Quantitation Level ND=Not Detected BRL=Below Reporting Level QA/QC Surrogates: Surrogates are compounds (preceeded with a %) added by the lab to determine analysis efficiency. Surrogate results(%) listed in the report are not "detected" compounds.

Sample Information Custody Information Matrix:

Location Code:

Rush Request:

P.O.#:

Collected by:

Received by:

Analyzed by:

WATER

BLCOMP-DAS

Standard 2301674.0211

03/14/25

SR1

see "By" below

JC

Laboratory Data

TRIP BLANK

Phoenix ID: CS80268

03/14/25 13:55

Parameter Result

RL/

PQL Units Date/Time By Reference

FOR: Attn: Joy Kloss BL Companies, Inc.

355 Research Parkway Meriden, CT 06450

Analysis Report March 21, 2025

Date Time

SDG ID: GCS80267

Client ID:

Project ID: 2301674.0211

Dilution

587 East Middle Turnpike, P.O.Box 370, Manchester, CT 06045 Tel. (860) 645-1102

Environmental Laboratories, Inc.

Volatiles ND1,1,1,2-Tetrachloroethane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,1,1-Trichloroethane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,1,2,2-Tetrachloroethane 0.50 03/17/25 MH SW8260Dug/L 1 ND1,1,2-Trichloroethane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,1-Dichloroethane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,1-Dichloroethene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,1-Dichloropropene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2,3-Trichlorobenzene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2,3-Trichloropropane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2,4-Trichlorobenzene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2,4-Trimethylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2-Dibromo-3-chloropropane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2-Dibromoethane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2-Dichlorobenzene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,2-Dichloroethane 0.60 03/17/25 MH SW8260Dug/L 1 ND1,2-Dichloropropane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,3,5-Trimethylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,3-Dichlorobenzene 1.0 03/17/25 MH SW8260Dug/L 1 ND1,3-Dichloropropane 1.0 03/17/25 MH SW8260Dug/L 1 ND1,4-Dichlorobenzene 1.0 03/17/25 MH SW8260Dug/L 1 ND2,2-Dichloropropane 1.0 03/17/25 MH SW8260Dug/L 1 ND2-Chlorotoluene 1.0 03/17/25 MH SW8260Dug/L 1 ND2-Hexanone 5.0 03/17/25 MH SW8260Dug/L 1 ND2-Isopropyltoluene 1.0 03/17/25 MH SW8260Dug/L 1 ND4-Chlorotoluene 1.0 03/17/25 MH SW8260Dug/L 1 ND4-Methyl-2-pentanone 5.0 03/17/25 MH SW8260Dug/L 1

TRIP BLANK

Phoenix I.D.: CS80268

Client ID:

2301674.0211Project ID:

Parameter Result

RL/

PQL Units Date/Time ByDilution Reference

NDAcetone 25 03/17/25 MH SW8260Dug/L 1 NDAcrylonitrile 1.0 03/17/25 MH SW8260Dug/L 1 NDBenzene 0.70 03/17/25 MH SW8260Dug/L 1 NDBromobenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDBromochloromethane 1.0 03/17/25 MH SW8260Dug/L 1 NDBromodichloromethane 0.50 03/17/25 MH SW8260Dug/L 1 NDBromoform 1.0 03/17/25 MH SW8260Dug/L 1 NDBromomethane 1.0 03/17/25 MH SW8260Dug/L 1 NDCarbon Disulfide 5.0 03/17/25 MH SW8260Dug/L 1 NDCarbon tetrachloride 1.0 03/17/25 MH SW8260Dug/L 1 NDChlorobenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDChloroethane 1.0 03/17/25 MH SW8260Dug/L 1 NDChloroform 1.0 03/17/25 MH SW8260Dug/L 1 NDChloromethane 1.0 03/17/25 MH SW8260Dug/L 1 NDcis-1,2-Dichloroethene 1.0 03/17/25 MH SW8260Dug/L 1 NDcis-1,3-Dichloropropene 0.40 03/17/25 MH SW8260Dug/L 1 NDDibromochloromethane 0.50 03/17/25 MH SW8260Dug/L 1 NDDibromomethane 1.0 03/17/25 MH SW8260Dug/L 1 NDDichlorodifluoromethane 1.0 03/17/25 MH SW8260Dug/L 1 NDEthylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDHexachlorobutadiene 0.40 03/17/25 MH SW8260Dug/L 1 NDIsopropylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDm&p-Xylene 1.0 03/17/25 MH SW8260Dug/L 1 NDMethyl ethyl ketone 5.0 03/17/25 MH SW8260Dug/L 1 NDMethyl t-butyl ether (MTBE) 1.0 03/17/25 MH SW8260Dug/L 1 NDMethylene chloride 1.0 03/17/25 MH SW8260Dug/L 1 NDNaphthalene 1.0 03/17/25 MH SW8260Dug/L 1 NDn-Butylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDn-Propylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDo-Xylene 1.0 03/17/25 MH SW8260Dug/L 1 NDp-Isopropyltoluene 1.0 03/17/25 MH SW8260Dug/L 1 NDsec-Butylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDStyrene 1.0 03/17/25 MH SW8260Dug/L 1 NDtert-Butylbenzene 1.0 03/17/25 MH SW8260Dug/L 1 NDTetrachloroethene 1.0 03/17/25 MH SW8260Dug/L 1 NDTetrahydrofuran (THF) 2.5 03/17/25 MH SW8260Dug/L 1 NDToluene 1.0 03/17/25 MH SW8260Dug/L 1 NDTotal Xylenes 1.0 03/17/25 MH SW8260Dug/L 1 NDtrans-1,2-Dichloroethene 1.0 03/17/25 MH SW8260Dug/L 1 NDtrans-1,3-Dichloropropene 0.40 03/17/25 MH SW8260Dug/L 1 NDtrans-1,4-dichloro-2-butene 5.0 03/17/25 MH SW8260Dug/L 1 NDTrichloroethene 1.0 03/17/25 MH SW8260Dug/L 1 NDTrichlorofluoromethane 1.0 03/17/25 MH SW8260Dug/L 1 NDTrichlorotrifluoroethane 1.0 03/17/25 MH SW8260Dug/L 1 NDVinyl chloride 1.0 03/17/25 MH SW8260Dug/L 1

QA/QC Surrogates 103% 1,2-dichlorobenzene-d4 03/17/25 MH 70 - 130 %% 1 94% Bromofluorobenzene 03/17/25 MH 70 - 130 %% 1

104% Dibromofluoromethane 03/17/25 MH 70 - 130 %% 1

TRIP BLANK

Phoenix I.D.: CS80268

Client ID:

2301674.0211Project ID:

Parameter Result

RL/

PQL Units Date/Time ByDilution Reference

101% Toluene-d8 03/17/25 MH 70 - 130 %% 1

Oxygenates & Dioxane ND1,4-Dioxane 100 03/17/25 MH SW8260D (OXY)ug/L 1 NDDiethyl ether 1.0 03/17/25 MH SW8260D (OXY)ug/L 1 NDEthyl tert-butyl ether 1.0 03/17/25 MH SW8260D (OXY)ug/L 1 NDtert-amyl methyl ether 1.0 03/17/25 MH SW8260D (OXY)ug/L 1

Comments:

TRIP BLANK INCLUDED.

Phyllis Shiller, Laboratory Director March 21, 2025

If you are the client above and have any questions concerning this testing, please do not hesitate to contact Phoenix Client Services at ext.200.

The contents of this report cannot be discussed with anyone other than the client listed above without their written consent.

Reviewed and Released by: Ethan Lee, Project Manager

RL/PQL=Reporting/Practical Quantitation Level ND=Not Detected BRL=Below Reporting Level QA/QC Surrogates: Surrogates are compounds (preceeded with a %) added by the lab to determine analysis efficiency. Surrogate results(%) listed in the report are not "detected" compounds.

QA/QC Data

Parameter Blk Blank RL

MS

MSD

MS

RPD

QA/QC Report March 21, 2025

587 East Middle Turnpike, P.O.Box 370, Manchester, CT 06045 Tel. (860) 645-1102

Environmental Laboratories, Inc.

SDG I.D.: GCS80267

LCS

Dup

RPD

LCSD

LCS

RPD

Rec

Limits

RPD

Limits Sample Result

Dup Result

QA/QC Batch 774857 (mg/L), QC Sample No: CS79988 (CS80267) Mercury - Water 98.8BRL 99.0NC 80 - 120 20<0.0002 <0.00020.0002

Additional Mercury Criteria: LCS acceptance range is 80-120% for aqueous and for soils the acceptance range is set by vendor limits. MS acceptance range is 75-125% for aqueous and 80-120% for soils.

Comment:

QA/QC Batch 775026 (mg/L), QC Sample No: CS80267 (CS80267) Mercury (Dissolved) 99.3BRL 101NC 80 - 120 20<0.0002 <0.00020.0002

Additional Mercury Criteria: LCS acceptance range is 80-120% for aqueous and for soils the acceptance range is set by vendor limits. MS acceptance range is 75-125% for aqueous and 80-120% for soils.

Comment:

QA/QC Batch 775090 (mg/L), QC Sample No: CS79274 (CS80267)

ICP Metals - Aqueous Arsenic 90.9BRL 93.1NC 92.8 0.3 80 - 120 20<0.002 <0.00200.0020 Barium 97.4BRL 99.99.00 98.0 1.9 80 - 120 200.007 0.00640.0010 Cadmium 92.3BRL 95.5NC 94.3 1.3 80 - 120 20<0.001 <0.00050.0005 Chromium 96.9BRL 99.8NC 98.4 1.4 80 - 120 20<0.001 <0.00050.0005 Copper 100BRL 103NC 101 2.0 80 - 120 20<0.003 <0.00250.0025 Lead 98.3BRL 102NC 100 2.0 80 - 120 20<0.001 <0.00050.0005 Selenium 82.4BRL 84.8NC 84.9 0.1 80 - 120 20<0.005 <0.00500.0050 Silver 94.6BRL 96.8NC 95.7 1.1 80 - 120 20<0.001 <0.00050.0005 Zinc 91.6BRL 94.6NC 93.8 0.8 80 - 120 200.021 0.01980.004

Additional Criteria: LCS acceptance range is 80-120% for aqueous and for soils the acceptance range is set by vendor limits. MS acceptance range 75-125%.

Comment:

QA/QC Batch 774664 (mg/L), QC Sample No: CS80351 (CS80267)

ICP Metals - Dissolved Arsenic 89.8BRL 85.17.10 85.6 0.6 80 - 120 200.058 0.0540.004 Barium 90.9BRL 87.52.60 87.8 0.3 80 - 120 200.119 0.1160.002 Cadmium 81.6BRL 84.8NC 85.0 0.2 80 - 120 20<0.001 <0.0010.001 Chromium 88.4BRL 88.3NC 88.4 0.1 80 - 120 20<0.001 <0.0010.001 Copper 93.7BRL 86.7NC 87.2 0.6 80 - 120 20<0.005 <0.0050.005 Lead 82.4BRL 85.2NC 85.0 0.2 80 - 120 200.009 0.0080.002 Selenium 84.0BRL 83.4NC 83.1 0.4 80 - 120 20<0.011 <0.0110.011 Silver 94.4BRL 84.9NC 85.1 0.2 80 - 120 20<0.001 <0.0010.001 Zinc 87.8BRL 85.7NC 85.7 0.0 80 - 120 200.003 0.0030.002

Additional Criteria: LCS acceptance range is 80-120% for aqueous and for soils the acceptance range is set by vendor limits. MS acceptance range 75-125%.

Comment:

Blk Blank RL

MS

MSD

MS

RPD

QA/QC Report March 21, 2025

587 East Middle Turnpike, P.O.Box 370, Manchester, CT 06045 Tel. (860) 645-1102

Environmental Laboratories, Inc.

SDG I.D.: GCS80267

LCS

LCSD

LCS

RPD

Rec

Limits

RPD

Limits

QA/QC Batch 775071 (mg/L), QC Sample No: CS80151 (CS80267)

TPH by GC (Extractable Products) Ext. Petroleum H.C. (C9-C36) ND 68 92 30.0 r60 - 120 200.10 % Terphenyl (surr) 78 69 99 35.7 r50 - 150 20%

A LCS and LCS Duplicate were performed instead of a matrix spike and matrix spike duplicate.

Additional surrogate criteria: LCS acceptance range is 60-120% MS acceptance range 50-150%. The ETPH/DRO LCS has been normalized based on the alkane calibration.

Comment:

QA/QC Batch 774642 (ug/L), QC Sample No: CS79808 (CS80267)

Polychlorinated Biphenyls

PCB-1016 ND 86 85 1.2 40 - 140 200.050

PCB-1221 ND 40 - 140 200.050

PCB-1232 ND 40 - 140 200.050

PCB-1242 ND 40 - 140 200.050

PCB-1248 ND 40 - 140 200.050

PCB-1254 ND 40 - 140 200.050

PCB-1260 ND 74 77 4.0 40 - 140 200.050

PCB-1262 ND 40 - 140 200.050

PCB-1268 ND 40 - 140 200.050

% DCBP (Surrogate Rec) 89 83 81 2.4 30 - 150 20% % DCBP (Surrogate Rec) (Confirm 83 81 79 2.5 30 - 150 20% % TCMX (Surrogate Rec) 76 82 83 1.2 30 - 150 20% % TCMX (Surrogate Rec) (Confirm 71 77 77 0.0 30 - 150 20%

QA/QC Batch 774643 (ug/L), QC Sample No: CS79809 (CS80267)

Pesticides

4,4' -DDD ND 79 96 19.4 40 - 140 200.003

4,4' -DDE ND 90 101 11.5 40 - 140 200.003

4,4' -DDT ND 70 77 9.5 40 - 140 200.003

a-BHC ND 74 79 6.5 40 - 140 200.002 Alachlor ND NA NA NC 40 - 140 200.005 Aldrin ND 74 75 1.3 40 - 140 200.002 b-BHC ND 80 78 2.5 40 - 140 200.002 Chlordane ND 70 79 12.1 40 - 140 200.050 d-BHC ND 55 49 11.5 40 - 140 200.005 Dieldrin ND 90 97 7.5 40 - 140 200.002 Endosulfan I ND 81 84 3.6 40 - 140 200.005 Endosulfan II ND 90 98 8.5 40 - 140 200.005 Endosulfan sulfate ND 75 77 2.6 40 - 140 200.005 Endrin ND 99 108 8.7 40 - 140 200.005 Endrin aldehyde ND 78 82 5.0 40 - 140 200.005 Endrin ketone ND 79 82 3.7 40 - 140 200.005 g-BHC ND 77 83 7.5 40 - 140 200.002

Blk Blank RL

MS

MSD

MS

RPD

SDG I.D.: GCS80267

LCS

LCSD

LCS

RPD

Rec

Limits

RPD

Limits

Heptachlor ND 79 82 3.7 40 - 140 200.005 Heptachlor epoxide ND 87 88 1.1 40 - 140 200.005 Methoxychlor ND 103 112 8.4 40 - 140 200.005 Toxaphene ND NA NA NC 40 - 140 200.20

% DCBP 63 66 71 7.3 30 - 150 20%

% DCBP (Confirmation) 65 65 72 10.2 30 - 150 20%

% TCMX 74 64 70 9.0 30 - 150 20%

% TCMX (Confirmation) 76 75 84 11.3 30 - 150 20%

A LCS and LCS duplicate were performed instead of a MS and MSD. Alpha and gamma chlordane were spiked and analyzed instead of technical chlordane. Gamma chlordane recovery is reported as chlordane in the LCS and LCSD

8081 additional criteria: (LCS/LCSD)10% of compounds can be outside of acceptance criteria as long as recovery is at least 10%. LCS acceptance range is 40-140% MS acceptance range 30-150%.

Comment:

QA/QC Batch 774892 (ug/L), QC Sample No: CS79977 (CS80267)

Semivolatiles 1,2,4,5-Tetrachlorobenzene ND 52 52 0.0 40 - 140 203.5 1,2,4-Trichlorobenzene ND 54 53 1.9 40 - 140 203.5 1,2-Dichlorobenzene ND 55 53 3.7 40 - 140 201.0 1,2-Diphenylhydrazine ND 60 60 0.0 40 - 140 201.6 1,3-Dichlorobenzene ND 54 52 3.8 40 - 140 201.0 1,4-Dichlorobenzene ND 53 51 3.8 40 - 140 201.0 2,2'-Oxybis(1-Chloropropane) ND 50 48 4.1 40 - 140 201.0 2,4,5-Trichlorophenol ND 61 60 1.7 40 - 140 201.0 2,4,6-Trichlorophenol ND 61 61 0.0 30 - 130 201.0 2,4-Dichlorophenol ND 56 57 1.8 30 - 130 201.0 2,4-Dimethylphenol ND 59 59 0.0 30 - 130 201.0 2,4-Dinitrophenol ND 51 49 4.0 30 - 130 201.0 2,4-Dinitrotoluene ND 70 68 2.9 30 - 130 203.5 2,6-Dinitrotoluene ND 68 68 0.0 40 - 140 203.5 2-Chloronaphthalene ND 59 58 1.7 40 - 140 203.5 2-Chlorophenol ND 56 53 5.5 30 - 130 201.0 2-Methylphenol (o-cresol) ND 58 55 5.3 40 - 140 201.0 2-Nitroaniline ND 84 83 1.2 40 - 140 203.5 2-Nitrophenol ND 53 51 3.8 40 - 140 201.0 3&4-Methylphenol (m&p-cresol) ND 64 64 0.0 30 - 130 201.0 3,3'-Dichlorobenzidine ND 24 38 45.2 l,r40 - 140 205.0 3-Nitroaniline ND 62 72 14.9 40 - 140 205.0 4,6-Dinitro-2-methylphenol ND 56 56 0.0 30 - 130 201.0 4-Bromophenyl phenyl ether ND 62 60 3.3 40 - 140 203.5 4-Chloro-3-methylphenol ND 61 62 1.6 30 - 130 201.0 4-Chloroaniline ND 47 62 27.5 r40 - 140 203.5 4-Chlorophenyl phenyl ether ND 60 60 0.0 40 - 140 201.0 4-Nitroaniline ND 66 66 0.0 40 - 140 205.0 4-Nitrophenol ND 71 64 10.4 30 - 130 201.0 Acetophenone ND 59 56 5.2 40 - 140 203.5 Aniline ND 49 68 32.5 r40 - 140 203.5 Benzidine ND 58 84 36.6 r40 - 140 204.5 Benzoic acid ND 57 56 1.8 30 - 130 2010 Benzyl butyl phthalate ND 71 69 2.9 40 - 140 201.5 Bis(2-chloroethoxy)methane ND 58 57 1.7 40 - 140 203.5 Bis(2-chloroethyl)ether ND 57 55 3.6 40 - 140 201.0 Bis(2-ethylhexyl)phthalate ND 70 67 4.4 40 - 140 201.5

Blk Blank RL

MS

MSD

MS

RPD

SDG I.D.: GCS80267

LCS

LCSD

LCS

RPD

Rec

Limits

RPD

Limits

Carbazole ND 64 62 3.2 40 - 140 205.0 Dibenzofuran ND 61 61 0.0 40 - 140 203.5 Diethyl phthalate ND 66 64 3.1 40 - 140 201.5 Dimethylphthalate ND 63 62 1.6 40 - 140 201.5 Di-n-butylphthalate ND 70 67 4.4 40 - 140 201.5 Di-n-octylphthalate ND 77 75 2.6 40 - 140 201.5 Hexachloroethane ND 54 53 1.9 40 - 140 203.5 Isophorone ND 55 54 1.8 40 - 140 203.5 N-Nitrosodimethylamine ND 54 53 1.9 40 - 140 201.0 N-Nitrosodi-n-propylamine ND 61 59 3.3 40 - 140 203.5 N-Nitrosodiphenylamine ND 55 54 1.8 40 - 140 203.5 Pentachloronitrobenzene ND 62 61 1.6 40 - 140 205.0 Phenol ND 56 54 3.6 30 - 130 201.0 % 2,4,6-Tribromophenol 29 64 63 1.6 15 - 110 20% % 2-Fluorobiphenyl 37 54 54 0.0 30 - 130 20% % 2-Fluorophenol 35 51 50 2.0 15 - 110 20% % Nitrobenzene-d5 36 54 53 1.9 30 - 130 20% % Phenol-d5 38 57 56 1.8 15 - 110 20% % Terphenyl-d14 41 59 56 5.2 30 - 130 20%

A LCS and LCS Duplicate were performed instead of a matrix spike and matrix spike duplicate.

Additional 8270 criteria: 10% of compounds can be outside of acceptance criteria as long as recovery is at least 10%. (Acid surrogates acceptance range for aqueous samples: 15-110%, for soils 30-130%)

Comment:

QA/QC Batch 774892 (ug/L), QC Sample No: CS79977 (CS80267)

Semivolatiles (SIM) 2-Methylnaphthalene ND 48 48 0.0 30 - 130 200.50 Acenaphthene ND 50 52 3.9 30 - 130 200.50 Acenaphthylene ND 44 47 6.6 30 - 130 200.50 Anthracene ND 50 52 3.9 30 - 130 200.50 Benz(a)anthracene ND 51 55 7.5 30 - 130 200.50 Benzo(a)pyrene ND 50 56 11.3 30 - 130 200.50 Benzo(b)fluoranthene ND 59 60 1.7 30 - 130 200.50 Benzo(ghi)perylene ND 52 55 5.6 30 - 130 200.50 Benzo(k)fluoranthene ND 55 57 3.6 30 - 130 200.50 Chrysene ND 50 53 5.8 30 - 130 200.50 Dibenz(a,h)anthracene ND 59 61 3.3 30 - 130 200.50 Fluoranthene ND 51 55 7.5 30 - 130 200.50 Fluorene ND 48 51 6.1 30 - 130 200.50 Hexachlorobenzene ND 48 48 0.0 30 - 130 200.50 Hexachlorobutadiene ND 39 39 0.0 30 - 130 200.50 Hexachlorocyclopentadiene ND 16 17 6.1 l30 - 130 200.50 Indeno(1,2,3-cd)pyrene ND 57 60 5.1 30 - 130 200.50 Naphthalene ND 47 47 0.0 30 - 130 200.50 Nitrobenzene ND 56 52 7.4 30 - 130 200.50 Pentachlorophenol ND 34 33 3.0 30 - 130 200.50 Phenanthrene ND 48 51 6.1 30 - 130 200.50 Pyrene ND 51 55 7.5 30 - 130 200.50 Pyridine ND 37 54 37.4 r30 - 130 200.50 % 2,4,6-Tribromophenol 30 49 53 7.8 15 - 110 20% % 2-Fluorobiphenyl 41 45 47 4.3 30 - 130 20% % 2-Fluorophenol 37 43 46 6.7 15 - 110 20% % Nitrobenzene-d5 39 48 49 2.1 30 - 130 20%

Blk Blank RL

MS

MSD

MS

RPD

SDG I.D.: GCS80267

LCS

LCSD

LCS

RPD

Rec

Limits

RPD

Limits

% Phenol-d5 41 46 49 6.3 15 - 110 20% % Terphenyl-d14 44 48 52 8.0 30 - 130 20%

A LCS and LCS Duplicate were performed instead of a matrix spike and matrix spike duplicate.

Additional 8270 criteria:20% of compounds can be outside of acceptance criteria as long as recovery is at least 10%. (Acid surrogates acceptance range for aqueous samples: 15-110%, for soils 30-130%)

Comment:

QA/QC Batch 775243 (ug/L), QC Sample No: CS79719 (CS80267, CS80268)

Volatiles - Water 1,1,1,2-Tetrachloroethane ND 109 122 11.3 70 - 130 201.0 1,1,1-Trichloroethane ND 99 109 9.6 70 - 130 201.0 1,1,2,2-Tetrachloroethane ND 102 109 6.6 70 - 130 200.50 1,1,2-Trichloroethane ND 105 113 7.3 70 - 130 201.0 1,1-Dichloroethane ND 92 101 9.3 70 - 130 201.0 1,1-Dichloroethene ND 95 103 8.1 70 - 130 201.0 1,1-Dichloropropene ND 101 111 9.4 70 - 130 201.0 1,2,3-Trichlorobenzene ND 102 111 8.5 70 - 130 201.0 1,2,3-Trichloropropane ND 99 107 7.8 70 - 130 201.0 1,2,4-Trichlorobenzene ND 101 114 12.1 70 - 130 201.0 1,2,4-Trimethylbenzene ND 109 121 10.4 70 - 130 201.0 1,2-Dibromo-3-chloropropane ND 100 105 4.9 70 - 130 201.0 1,2-Dibromoethane ND 103 114 10.1 70 - 130 201.0 1,2-Dichlorobenzene ND 106 117 9.9 70 - 130 201.0 1,2-Dichloroethane ND 101 109 7.6 70 - 130 201.0 1,2-Dichloropropane ND 101 115 13.0 70 - 130 201.0 1,3,5-Trimethylbenzene ND 107 121 12.3 70 - 130 201.0 1,3-Dichlorobenzene ND 106 115 8.1 70 - 130 201.0 1,3-Dichloropropane ND 103 115 11.0 70 - 130 201.0 1,4-Dichlorobenzene ND 107 119 10.6 70 - 130 201.0 1,4-dioxane ND 110 108 1.8 70 - 130 20100 2,2-Dichloropropane ND 94 102 8.2 70 - 130 201.0 2-Chlorotoluene ND 105 113 7.3 70 - 130 201.0 2-Hexanone ND 89 94 5.5 70 - 130 205.0 2-Isopropyltoluene ND 110 125 12.8 70 - 130 201.0 4-Chlorotoluene ND 107 118 9.8 70 - 130 201.0 4-Methyl-2-pentanone ND 93 101 8.2 70 - 130 205.0 Acetone ND 92 98 6.3 70 - 130 205.0 Acrylonitrile ND 85 96 12.2 70 - 130 205.0 Benzene ND 105 116 10.0 70 - 130 200.70 Bromobenzene ND 106 115 8.1 70 - 130 201.0 Bromochloromethane ND 108 120 10.5 70 - 130 201.0 Bromodichloromethane ND 101 113 11.2 70 - 130 200.50 Bromoform ND 110 120 8.7 70 - 130 201.0 Bromomethane ND 76 87 13.5 70 - 130 201.0 Carbon Disulfide ND 99 108 8.7 70 - 130 201.0 Carbon tetrachloride ND 99 108 8.7 70 - 130 201.0 Chlorobenzene ND 108 119 9.7 70 - 130 201.0 Chloroethane ND 103 111 7.5 70 - 130 201.0 Chloroform ND 100 108 7.7 70 - 130 201.0 Chloromethane ND 102 110 7.5 70 - 130 201.0 cis-1,2-Dichloroethene ND 98 106 7.8 70 - 130 201.0 cis-1,3-Dichloropropene ND 103 109 5.7 70 - 130 200.40 Dibromochloromethane ND 107 121 12.3 70 - 130 200.50

Blk Blank RL

MS

MSD

MS

RPD

SDG I.D.: GCS80267

LCS

LCSD

LCS

RPD

Rec

Limits

RPD

Limits

Dibromomethane ND 106 114 7.3 70 - 130 201.0 Dichlorodifluoromethane ND 107 118 9.8 70 - 130 201.0 Ethyl ether ND 94 110 15.7 70 - 130 201.0 Ethyl tert-butyl ether ND 94 105 11.1 70 - 130 201.0 Ethylbenzene ND 108 121 11.4 70 - 130 201.0 Hexachlorobutadiene ND 99 115 15.0 70 - 130 200.40 Isopropylbenzene ND 103 116 11.9 70 - 130 201.0 m&p-Xylene ND 112 124 10.2 70 - 130 201.0 Methyl ethyl ketone ND 93 101 8.2 70 - 130 205.0 Methyl t-butyl ether (MTBE) ND 93 104 11.2 70 - 130 201.0 Methylene chloride ND 95 101 6.1 70 - 130 201.0 Naphthalene ND 99 109 9.6 70 - 130 201.0 n-Butylbenzene ND 102 117 13.7 70 - 130 201.0 n-Propylbenzene ND 107 117 8.9 70 - 130 201.0 o-Xylene ND 106 119 11.6 70 - 130 201.0 p-Isopropyltoluene ND 104 117 11.8 70 - 130 201.0 sec-Butylbenzene ND 104 119 13.5 70 - 130 201.0 Styrene ND 113 125 10.1 70 - 130 201.0 tert-amyl methyl ether ND 101 111 9.4 70 - 130 201.0 tert-Butylbenzene ND 104 115 10.0 70 - 130 201.0 Tetrachloroethene ND 106 116 9.0 70 - 130 201.0 Tetrahydrofuran (THF) ND 91 100 9.4 70 - 130 202.5 Toluene ND 104 114 9.2 70 - 130 201.0 trans-1,2-Dichloroethene ND 93 106 13.1 70 - 130 201.0 trans-1,3-Dichloropropene ND 108 117 8.0 70 - 130 200.40 trans-1,4-dichloro-2-butene ND 100 105 4.9 70 - 130 205.0 Trichloroethene ND 104 118 12.6 70 - 130 201.0 Trichlorofluoromethane ND 104 113 8.3 70 - 130 201.0 Trichlorotrifluoroethane ND 97 108 10.7 70 - 130 201.0 Vinyl chloride ND 97 108 10.7 70 - 130 201.0 % 1,2-dichlorobenzene-d4 106 99 101 2.0 70 - 130 20% % Bromofluorobenzene 93 94 95 1.1 70 - 130 20% % Dibromofluoromethane 100 99 100 1.0 70 - 130 20% % Toluene-d8 100 98 99 1.0 70 - 130 20%

A LCS and LCS Duplicate were performed instead of a matrix spike and matrix spike duplicate.

Additional 8260 criteria: 10% of LCS/LCSD compounds can be outside of acceptance criteria as long as recovery is 40-160%.

Comment:

l = This parameter is outside laboratory LCS/LCSD specified recovery limits.

r = This parameter is outside laboratory RPD specified recovery limits.

MS

Phyllis Shiller, Laboratory Director

If there are any questions regarding this data, please call Phoenix Client Services at extension 200.

March 21, 2025

MS Dup

RPD

LCS

LCSD

NC

Intf

Matrix Spike Matrix Spike Duplicate

Relative Percent Difference Laboratory Control Sample Laboratory Control Sample Duplicate

No Criteria Interference

(ISO) Isotope Dilution-

Sample Criteria Exceedances ReportFriday, March 21, 2025

Acode Phoenix Analyte CriteriaResult RLSampNo Analysis

UnitsCriteria

GCS80267 - BLCOMP-DASCriteria: None

RL

Criteria

State: CT

#Type!*** No Data to Display ***

Phoenix Laboratories does not assume responsibility for the data contained in this exceedance report. It is provided as an additional tool to identify requested criteria exceedences. All efforts are made to ensure the accuracy of the data (obtained from appropriate agencies). A lack of exceedence information does not necessarily suggest conformance to the criteria. It is ultimately the site professional's responsibility to determine appropriate compliance.

Phoenix Environmental Laboratory, Inc.

Project Manager

Yes Were all samples received by the laboratory in a condition consistent with that described on the associated chain-of-custody document(s)?

For each analytical method referenced in this laboratory report package, were all specified QA/QC performance criteria followed, including the requirement to explain any criteria falling outside of acceptable guidelines, as specified in the CT DEEP method-specific Reasonable Confidence Protocol documents?

No

Were all QA/QC performance criteria specified in the Reasonable Confidence Protocol documents acheived? See Sections: ETPH Narration, SVOA Narration, SVOASIM Narration.

For each analytical method referenced in this laboratory report package, were results reported for all constituents identified in the method-specific analyte lists presented in the Reasonable Confidence Protocol documents?

Friday, March 21, 2025Date:

Notes: For all questions to which the response was “No” (with the exception of question #7), additional information must be provided in an attached narrative. If the answer to question #1, #1A, or #1B is “No”, the data package does not meet the requirements for “Reasonable Confidence.” This form may not be altered, and all questions must be answered.

Authorized Signature:

Project No.

Phoenix Environmental Labs, Inc.

Laboratory Name

Project Location 2301674.0211

Yes No

Yes No

Yes No

Laboratory Sample ID(s):Sampling Date(s) 3/14/2025

Were samples received at an appropriate temperature (≤6° C)?

3 Yes No

Yes No

Are project-specific matrix spikes and laboratory duplicates included in this data set for applicable RCPs?

7 Yes No

Printed Name:

Position:

LIST RCP METHODS USED (e.g., 8260,8270, etc.)

YesWere the method-specified preservation and holding time requirements met? No 1A

Was the VPH or EPH method conducted without significant modifications (see respective RCPs) 1B Yes No

NA

Were reporting limits / limits of quantitation specified or referenced on the chain-of-custody? 5 Yes No

NA

RCP QA/QC Certification Form

REASONABLE CONFIDENCE PROTOCOL

LABORATORY ANALYSIS QA/QC CERTIFICATION FORM

CS80267, CS80268

VPH and EPH methods only:

Name of Laboratory

This certification form is to be used for RCP methods only.

Bureau of Water Protection and Land Reuse Remediation Division

Version 2024 Page 1 of 1

If samples were received by the laboratory on the same day of collection and were stored and transported to the laboratory on ice, cooler temperatures above 6ºC are acceptable.

Were these reporting limits / limits of quantitation met? 5a

Client Name BL Companies, Inc.

6010, 7470/7471, 8081, 8082, 8260, 8270, ETPH

Ethan Lee

I, the undersigned, attest under the pains and penalties of perjury that, to the best of my knowledge and belief and based upon my personal inquiry of those responsible for providing the information contained in this analytical report, such information is accurate and complete.

RCP Certification Report

587 East Middle Turnpike, P.O.Box 370, Manchester, CT 06045 Tel. (860) 645-1102 Fax (860) 645-0823

Environmental Laboratories, Inc.

SDG I.D.: GCS80267

SDG Comments Metals Analysis:

The client requested a site specific list of elements which is shorter than the 6010 RCP list.

ETPH Narration Were all QA/QC performance criteria specified in the Reasonable Confidence Protocol documents achieved? No.

QC Batch 775071 (Samples: CS80267): -----

The LCS/LCSD RPD exceeds the method criteria for one or more analytes, but these analytes were not reported in the sample(s) so no variability is suspected. (Ext. Petroleum H.C. (C9-C36))

The LCS/LCSD RPD exceeds the method criteria for one or more surrogates, therefore there may be variability in the reported result. (% Terphenyl (surr))

Instrument:

CS80267 (1X)

AU-XL2 03/19/25-1 Jeff Bucko, Chemist 03/19/25

The initial calibration (ETPH128I) RSD for the compound list was less than 30% except for the following compounds: None.

As per section 7.2.3, a discrimination check standard was run (319A003_1) and contained the following outliers: None.

The continuing calibration %D for the compound list was less than 30% except for the following compounds:None.

QC (Batch Specific):

CS80267

Batch 775071 (CS80151)

All LCS recoveries were within 60 - 120 with the following exceptions: None.

All LCSD recoveries were within 60 - 120 with the following exceptions: None.

All LCS/LCSD RPDs were less than 20% with the following exceptions: % Terphenyl (surr)(35.7%), Ext. Petroleum H.C. (C9- C36)(30.0%) A LCS and LCS Duplicate were performed instead of a matrix spike and matrix spike duplicate.

Additional surrogate criteria: LCS acceptance range is 60-120% MS acceptance range 50-150%. The ETPH/DRO LCS has been normalized based on the alkane calibration.

Mercury Narration Were all QA/QC performance criteria specified in the analytical method achieved? Yes.

Instrument:

CS80267

PSA 03/18/25 07:08 John Maslak, Zade-Anne Taylor, Chemist 03/18/25

The initial calibration met criteria and the linear range is defined daily by the calibration range.

The Low-Level Calibration Verification (LLCV) met criteria.

The following Initial Calibration Verification (ICV) compounds did not meet criteria: None.

The following Initial Calibration Blank (ICB) compounds did not meet criteria: None.

The following Continuing Calibration Verification (CCV) compounds did not meet criteria: None.

The following Continuing Calibration Blank (CCB) compounds did not meet criteria: None.

Certification Report

587 East Middle Turnpike, P.O.Box 370, Manchester, CT 06045 Tel. (860) 645-1102 Fax (860) 645-0823

Environmental Laboratories, Inc.

SDG I.D.: GCS80267

Mercury Narration QC (Batch Specific):

CS80267

Batch 774857 (CS79988)

All LCS recoveries were within 80 - 120 with the following exceptions: None.

Additional Mercury Criteria: LCS acceptance range is 80-120% for aqueous and for soils the acceptance range is set by vendor limits. MS acceptance range is 75-125% for aqueous and 80-120% for soils.

QC (Site Specific):

CS80267

Batch 775026 (CS80267)

All LCS recoveries were within 80 - 120 with the following exceptions: None.

All MS recoveries were within 75 - 125 with the following exceptions: None.

Additional Mercury Criteria: LCS acceptance range is 80-120% for aqueous and for soils the acceptance range is set by vendor limits.