May 27, 2026

Mr. Jason Coite P.E.

Principal Engineer Division of Environmental Compliance Bureau of Engineering and Construction State of Connecticut Department of Transportation 2800 Berlin Turnpike, P.O. Box 317546 Newington, CT 06131-7546

Attention: Michael Bedson, P.E. / Felix Mathieu

Subject: On-Call Asbestos, Lead, Air Quality & Demolition Compliance Agreement No. 10.04-02 (23) HazMat Inspection – Rehabilitation of Bridge No. 06770, Milford, CT ConnDOT Assignment No. 524-8796 ConnDOT Project No. 83-270 TRC Project No. 501871.8796.0710

Dear Mr. Coite:

TRC conducted a limited hazardous materials site investigation associated with the rehabilitation of Bridge No. 06770 in Milford, CT. No painted surfaces were identified at Bridge No. 06770;

therefore, no lead paint was identified. Suspect asbestos black tar coating lining the interior of the culvert pipe and mortar from the culvert structure were sampled and determined to be a non-asbestos containing materials. No other hazardous/regulated items, bird/pigeon guano, or homeless activity/bloodborne pathogens were identified in the accessible areas of Bridge No.

06770.

Laboratory results, project description/site map, and TRC Mobile Data Solutions report are attached.

If you have any questions, please call TRC at (860) 298-9692.

Very Truly Yours, TRC

Stephen R. Arienti, CHMM New England Regional Practice Leader – Engineer in Charge

Erik R. Plimpton, P.E., CHMM, CMC Vice President – Engineer in Charge

Industrial Hygiene Laboratory 21 Griffin Road North Windsor, CT 06095

(860) 298-6308

69610.CT-DOT.doc

Lab Log #: 0069610

Milford Culvert 06770, Milford, CT

CLIENT: CT Department of Transportation

Site:

Date Analyzed:

Date Received:

05/15/2026

05/14/2026

Project #: 501871.8796.0710

BULK ASBESTOS ANALYSIS REPORT

Asbestos Type

Other Matrix MaterialsSample No.

Asbestos

POLARIZED LIGHT MICROSCOPY by EPA 600/R-93/116

Sample Location Homogeneous

Material Description interior east culvert wall - - - None1 NDGrey CM1 - culvert mortar interior west culvert wall - - - None2 NDGrey CM1 - culvert mortar interior east culvert wall - - - None3 NDBlack ICT1 - culvert tar interior west culvert wall - - - None4 NDBlack ICT1 - culvert tar

Trace - asbestos was observed at level of 1% or less - This is the reporting limit NA/PS - Not Analyzed / Positive Stop SNA - Sample Not Analyzed- See Chain of Custody for details Notes: Asbestos-Containing Material (ACM) is any material containing more than 1% asbestos

The Laboratory at TRC follows 18/01A EPA -- 40 CFR Appendix E to subpart E of Part 763, Interim Method of the Determination of Asbestos in Bulk Insulation Samples and 18/A03 EPA 600/R-93/116: Method for the Determination of Asbestos in Bulk Building Materials which utilize polarized light microscopy (PLM). Our analysts have completed an accredited course in asbestos identification. TRC's Laboratory is accredited under the National Voluntary Laboratory Accreditation Program (NVLAP), for Bulk Asbestos Fiber Analysis, NVLAP Code 101424-01. TRC is accredited by the AIHA Laboratory Accreditation Programs AIHA LAP (ID: LAP-100122) in the Industrial Hygiene Program (IHLAP) for PLM. Asbestos content is determined by visual estimate unless otherwise indicated. Quality Control is performed in-house on at least 10% of samples and QC data related to the samples is available upon written request from client.

This report shall not be reproduced, except in full, without the written approval of TRC. This report must not be used by the client to claim product endorsement by NVLAP or any agency of the U.S. Government. This report relates only to the items tested, as received by the laboratory.

ND - asbestos was not detected

Note: Polarized-light microscopy is not consistently reliable in detecting asbestos in floor coverings and similar non-friable organically bound materials. In those cases, EPA recommends, and certain states (e.g. NY) require, that negative results be confirmed by quantitative transmission electron microscopy.

Analyzed by: Reviewed by Date Issued

05/15/2026Kathleen Williamson, Laboratory ManagerNajaat Bhura, Quality Manager

TRC LABORATORY ASBESTOS ANALYTICAL ACCREDITATIONS

NVLAP Lab Code 101424-0

RI #PLM00007 TX #300354

CO# AL-21772

AIHA LAP #100122

VT #An-000020

LA#05011

CT #PH-0426

VA #3333 000283

PA#68-03387

NY #10980

NV #CT00004

WA #C1071

WV #000622

CA #2907

ME LB-0071

AZ #AZ0944

PHIL#ALL-461

MA #AA000052

HI #L-09-004

EMSL

528 Mineola Ave, Carle Place, NY 11514 TEM Bulk Chain of Custody Record

Date: 05/15/2026

PO#: C501871 Analysis Type: TEM EPA N.O.B Client: CT DOT Client Job#: 501871.8796.0710 Client Job Ref./Loc. Milford Culvert 06770, Milford, CT Relinquished by: N. Bhura Received by:

Report to: KWilliamson@trccompanies.com; SArienti@trccompanies.com EPlimpton@trccompanies.com

DCarillo@trccompanies.com KGraff@trccompanies.com NBhura@trccompanies.com GKaczynski@trccompanies.com Sampler’s Name: Z. Smith Turnaround Time: <12 Hour <24 Hour <48 Hour <3 Day 5 Day Other:

For Lab Use Only

Client ID # Lab ID# Description Location Acceptable on Receipt

Comments

4 69610 Culvert Tar See COC

For Lab Use Only # Spies Total Client # Batch # Results Reported Comments mailto:KWilliamson@trccompanies.com mailto:SArienti@trccompanies.com mailto:EPlimpton@trccompanies.com mailto:DCarillo@trccompanies.com mailto:KGraff@trccompanies.com mailto:NBhura@trccompanies.com mailto:GKaczynski@trccompanies.com

EMSL Analytical, Inc.

528 Mineola Avenue Carle Place, NY 11514

Tel/Fax: (516) 997-7251 / (516) 997-7528 http://www.EMSL.com / carleplacelab@emsl.com

EMSL Order: 062605256

Customer ID: TRC51

Customer PO: 50187187960710

Project ID:

Attention: Kathleen Williamson Phone: (860) 298-9692

TRC Environmental Consultants Fax: (860) 298-6399

21 Griffin Road North Received Date: 05/19/2026 11:09 AM

Windsor, CT 06095 Analysis Date: 05/20/2026

Collected Date: 05/14/2026

501871.8796.0710; ConnDOT Milford Culvert 06770Project:

Test Report: Asbestos Analysis of Non-Friable Organically Bound Materials by TEM via

EPA/600/R-93/116 Section 2.5.5.1

Sample ID Description Appearance % Matrix Material % Non-Asbestos Fibers Asbestos Types

062605256-0001

Interior West Culvert Wall

- ICTU - Black Interor

Cuvlert Tar

Black

Non-Fibrous

Homogeneous

100.0 None No Asbestos DetectedOther

Analyst(s)

Luisa Vargas (1) Daniel Clarke, Asbestos Laboratory Manager or other approved signatory

EMSL maintains liability limited to cost of analysis . Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations . The report reflects the samples as received.

Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted. EMSL recommends that samples reported as none detected or < 1% undergo additional analysis via PLM to avoid the possibility of false negatives.

Samples analyzed by EMSL Analytical, Inc. Carle Place, NY

Initial report from: 05/20/2026 11:49:36

ASB_PLMEPANOB_0012_0002 Printed 5/20/2026 11:51:00AM Page 1 of 1

OrderID: 062605256

OrderID: 062605256

State Bridge Program

SPN 0083-0270

FAP No. N/A

Rehabilitation of Bridge No. 06770

Milford Parkway over Unnamed Brook.

Milford

Project Description

Bridge No. 06770 (single barrel culvert) carries an unnamed brook under SR 796 (Milford Parkway) and is located ± 0.2 miles north of Route 15 (Merritt Parkway) and ±36 feet upstream of a 72-inch single broken-back culvert under Metro-North Railroad (MNR) Waterbury Branch. The unnamed brook flows parallel to

SR 796 before it enters the subject culvert and flows further into a 72-inch RCP under Metro North Railroad

(MNR) before discharging into the Housatonic River to the west.

This project is intended to address structural deficiencies and provide a complete rehabilitation of the existing culvert. The rehabilitation will be achieved through relining the existing 72-inch diameter, 196-foot-long ACCMP pipe.

Bridge No. 06770 is a 72-inch diameter asphalt-coated corrugated metal pipe (ACCMP) culvert that carries an unnamed brook under SR 796 (Milford Parkway Extension) in Milford. Built in 1992, the culvert is 196 feet long and carries flow under SR 796 at a 42° skew. The culvert is located ± 0.2 miles north of Route 15

(Merritt Parkway) and ±36 feet upstream of a 72-inch single broken-back culvert under Metro-North

Railroad (MNR) Waterbury Branch. SR 796 is a two-lane bi-directional Urban Freeway with an overall width of 56 feet and has an ADT of 28,700 (2022). SR 796, has a posted speed limit of 55 mph. An advisory speed limit sign of 45 mph is located on the eastbound lane prior to the project due to the horizontal curve.

SR 796 has Average Daily Traffic (ADT) of approximately 28,100 vehicles (2022 CTDOT Open Data

Portal-Annual Average Daily Traffic), 20,100 of which are EB and 8,000 for WB. The existing lane configuration of SR 796 Eastbound consists of a single 12- foot travel lane with a 4-foot inside shoulder and a 12-foot outside shoulder. The existing lane configuration of SR 796 Westbound consists of a single

14-foot travel lane with a 3 to 4-foot inside shoulder and an 8-foot outside shoulder. Metal Beam Rail

(MBR) is present along both sides of the roadway. Minimal impacts on the roadway are expected.

Embankment fill above the culvert ranges between 17 feet to 46-feet. There are reinforced concrete end walls and flared wing walls beyond the edges of pavement on the east and west sides of the highway. The existing culvert is Structurally Deficient due to the deteriorated condition of the pipe.

The proposed project is intended to address structural deficiencies in the existing culvert and provide a complete rehabilitation of the existing culvert and extend its service life. The rehabilitation will be achieved by providing structural relining in the existing 72-inch diameter, 196-foot-long ACCMP pipe. The structural liner pipe will be a Glass Reinforced Polymer (GRP) pipe with an Outer Diameter (OD) of 65 inches and an Inner Diameter (ID) of 63.11 inches. The existing corrugated pipe has areas of severe section loss as well as perforations in the lower portions of the culvert. These areas will be cleaned and any voids below the existing pipe shall be filled with pressure grouting prior to installation of the GRP liner pipe. The space between the existing pipe and the proposed liner pipe will be filled with controlled low strength material grout which will transfer all the loads from the earth fill to the existing culvert and into the proposed structural liner. It should be noted that the effect of live load on the culvert pipe is negligible due to the fill height over the pipe. The proposed construction would also include the clearing and re-armoring of the inlet and outlet areas and rehabilitating and patching of the headwalls and wing walls at the inlet and reconstructing the northwest wing wall at the outlet. New cast-in-place cutoff walls will also be added at both inverts to prevent future scouring and undermining.

To improve inlet hydraulics, a beveled entrance is also proposed. Baffles will be installed in the runout section of the culvert to arrest the velocity increase. The deteriorated existing standard riprap outlet protection will be replaced with a preformed scour hole. Temporary access roads will be constructed both on the inlet and outlet sides to provide access for construction personnel and equipment. The existing 12

State Bridge Program

SPN 0083-0270

FAP No. N/A

Rehabilitation of Bridge No. 06770

Milford Parkway over Unnamed Brook.

Milford foot wide by 12-foot-high reinforced concrete tunnel located approximately 180 feet north of the culvert inlet will also be used for construction access from the east to the to the downstream end on the west.

Temporary Earth Retaining Systems (TERS) will be installed to construct the temporary access road on the west side of SR 796 beyond the access tunnel to gain access to the outlet. The off- road/embankment grades will be restored to pre-construction conditions.

SR 796 serves as an important connection between the Merritt Parkway and Interstate 95 with no other alternate routes. During construction, two lanes of traffic (one in each direction) will be maintained.

Rehabilitation of the existing culvert will be accomplished in one construction season utilizing a single construction stage consisting of a long-term closure of the right shoulder on SR 796 Eastbound to facilitate construction access to the culvert from within the ramp in-field area.

Maintenance and Protection of Traffic during construction will implement short-term shoulder closures as required to facilitate construction activities. There may be short duration periods during material delivery via the temporary and permanent access roads. At no time will traffic be detoured. All traffic on Milford

Parkway within the project will always be maintained.

PShrestha Rectangle

PShrestha Rectangle

PShrestha Line

PShrestha Text Box

LOCATION MAP

PShrestha Image

PShrestha Ellipse

PShrestha Callout Bridge No. 06770 Unnamed Brook Under SR 796 (Milford Parkway)

PShrestha Text Box Rehabilitation of Bridge No. 06770 Unnamed Brook Under SR 796 (Milford Parkway) Milford

RArmstrong Text Box Project No. 0083-0270

SIH - WinSIH HBM Survey ConnDOT, Milford Culvert 06770, 612 Wheelers Farm Rd Milford Connecticut 06461 US

5/14/2026, 9:55:12 AM EDT

CREATED

5/14/2026, 9:40:15 AM EDT

by Hugh Crundwell

UPDATED

5/14/2026, 9:55:12 AM EDT

by Hugh Crundwell

STATUS

In Progress

ASSIGNED TO

No Assignment

NOTE: No site sketch detected! Please be sure to add at least one.

JOB INFORMATION

Site Name Milford Culvert 06770

Address 612 Wheelers Farm Rd Milford Connecticut 06461

US

TRC Project Number 501871.8796.0710

Project Manager Erik Plimpton, Stephen Arienti

Inspector(s) Zac Smith, Hugh Crundwell

Client ConnDOT

Type of Asbestos Survey Reno/Demo

Site Sketch Diagrams

Additional Analysis for NOB Materials (Calc)

TEM NY NOB 198.4

PLM Turnaround Time (TAT) 3-day

TEM Turnaround Time (TAT) 3-day

Date May 14, 2026

General Notes No lead based paint

Overview Photo

Options & Other Settings

Use auto-numbering? No

Auto-fill gaps? Yes

Alert user about missing site sketch? Yes

SURVEYS PERFORMED Asbestos, Bridge/Signs/Light Pole/Traffic Signal Items

Asbestos Survey

Materials & Samples (2 Items)

Materials & Samples - 1. (2) Samples #1–2: CM1–Grey Culvert Mortar

Sample Information

Asbestos Samples (2 Items)

Asbestos Samples - 1. Sample #1: CM1…Interior east culvert wall

Sample Number 1

Sample Location Interior east culvert wall

Asbestos Bulk Analysis PLM EPA 600/R93/116

Grab or Composite Grab

Date May 14, 2026

Time 09:45

Sample Location Photo

Asbestos Samples - 2. Sample #2: CM1…Interior west culvert wall

Sample Number 2

Sample Location Interior west culvert wall

Asbestos Bulk Analysis PLM EPA 600/R93/116

Grab or Composite Grab

Date May 14, 2026

Time 09:45

Sample Location Photo

Material Information

Sampled or Assumed? Sampled

Material Acronym CM1

Material Description Grey Culvert Mortar

Material Color Light Grey

Representative Photos

Analyze by layer? No

Is material non-friable organically bound (NOB)?

No

Homogeneous Area

Total Approximate Quantity

Notes

Materials & Samples - 2. (2) Samples #3–4: ICT1–Black Interior Culvert Tar

Sample Information

Asbestos Samples (2 Items)

Asbestos Samples - 1. Sample #3: ICT1…Interior east culvert wall

Sample Number 3

Sample Location Interior east culvert wall

Asbestos Bulk Analysis PLM EPA 600/R93/116

Grab or Composite Grab

Date May 14, 2026

Time 09:45

Sample Location Photo

Asbestos Samples - 2. Sample #4: ICT1…Interior west culvert wall

Sample Number 4

Sample Location Interior west culvert wall

Asbestos Bulk Analysis PLM EPA 600/R93/116

Grab or Composite Grab

Date May 14, 2026

Time 09:46

Sample Location Photo

Material Information

Sampled or Assumed? Sampled

Material Acronym ICT1

Material Description Black Interior Culvert Tar

Material Color Black

Representative Photos

Analyze by layer? No

Is material non-friable organically bound (NOB)?

Yes

Homogeneous Area

Total Approximate Quantity

Notes

Bridge/Signs/Light Pole/Traffic Signal Item Inventory

Items (1 Item)

Items - 1. Milford Culvert 06770

Bridge/Sign/Light Pole/Traffic Signal No.

Milford Culvert 06770

General Notes Little hard to access, down through woods. Be careful for slippery conditions

Accessibility Accessible

Paint on Structure (s)? No

Suspect Asbestos Containing Materials Identified on Structure

Yes

Guano Present? No

Homeless Activity No

Bloodborne Pathogen Concerns? No

Mice/Mouse Nests/Droppings No

LAB & SAMPLE SUBMISSION INFO

Signature

Asbestos Bulk Samples

Remarks to be added to the CoC

Asbestos samples submitted to TRC lab?

No

Date Submitted to Lab

Asbestos bulk sample CoC data electronically sent to lab yet?

No

Asbestos bulk sample results reviewed? No

REPORT CREATION

Select one or more documents below to be generated. Once completed in the cloud, they will be sent to the listed email address.

NOTE: Asbestos bulk sample CoC data must now be sent electronically to the lab by selecting "Asbestos chain-of-custody - Send to Lab" from the list below.

What documents should be generated?

Generate Documents

PROJECT STATUS TRACKING

Has this survey been completed? No

Has the report been written? No

Has the report been reviewed? No