Raymark Community Advisory Group

Meeting July 23, 2019

Agenda

O Introductions

O Contract Plating Update

O Raymark Update

O Air Monitoring Overview

O Traffic Management Plan

O Questions

O Adjournment

Welcome & Introductions

Meeting Guidelines

O Hold questions until the end

O Ask questions related to the presentation topic

O See agenda

O Use note cards

O Place cards in basket at end

O Silence cell phones

O Please step out to take phone calls

O When asking questions

O Talk one at a time, limit side conversations

O State your name and the neighborhood you live in

(street name)

O Be respectful

Contract Plating Update Tighe & Bond

CONTRACT PLATING SLAB REMOVAL AND SOIL

REMEDIATION

• Buildings demolished in

2014 and 2015

• Slabs left in place for

disposal characterization

• Environmental site

assessment conducted

within building areas

• Remediation plan reviewed

and approved by EPA’s

TSCA group (separate from

Superfund) in June 2019

• Work starting this week

• 8 weeks anticipated

Concrete Removal

Soil Excavation

Trucking and Disposal

Dust Control and Monitoring

Raymark Update Environmental Protection Agency

Consolidation

Remedy Update

12

OU3 &OU6

OU

4

OR

Jim DiLorenzo

USEPA Region 1

August 2019 CAG

Meeting

Haul Road and Barriers

Schedule November 23, 2018 – Contract awarded to

Tantara

December 13, 2018 – Kick-off meeting

March 20, 2019 – Office trailers mobilized

and clearing and grubbing

began

Mid April – Conduct pre-construction home

inspections

Late April – Conduct mini- investigation

behind press box

• Early May – Start construction of the

barrier

• Mid June – Start construction of the haul

road

13

3 to 4

months

delay

ongoing

14

Observation after clearing Fence

Alignment

15

16

17

18

Vibration Monitoring Investigation

19

20

Vibration Monitoring Conclusions

• Access for pre-construction home surveys received

for 25 (out of 33) homes

• Survey was completed at 10 homes closest to

where bedrock/ledge was proposed to be

removed/removal techniques tested.

• During rock removal, seismic recorders were place

in close proximity to intrusive activities, between the

activity and the home

• All measurements recorded were at or below 0.100

in/sec which is below the threshold limit for possible

structural damage

This Photo by

Unknown Author

is licensed under

CC BY-SA-NC

Excavation and Consolidation

Schedule • November 23, 2018 – Tantara (Barrier and Haul Road)

• March 15, 2019 –Sevenson (Consolidation Remedy)

• Fall/Winter 2019 – Construct barrier and haul road

• Winter 2019/2020 – Clearing/RW removal/grandstand

demo

• Spring 2020 - Excavation from four OU6 properties 1. Wooster Park

2. 380 E. Main Street

3. 200 Ferry Boulevard

4. Vacant Lots behind 326 Ferry Blvd

• 2020/2021 – OU3/OU6 digging

• 2022/2023 – Cap and Done?

21

Barrier and Haul

Road

22

23

Haul

Road

and

Barriers

24

Model UNC-XT-1 TAN Outdoor Sound Curtain

UNC-XT-1 offers the benefits of both a

noise barrier and

a sound absorber composite in one

product. This UNC

product consists of an exterior grade, UV

resistant heavy duty faced quilted

fiberglass absorber bonded to a one pound

per sq. ft. reinforced loaded vinyl barrier.

The

heavy duty facing is a 10 oz. per sq. yd.

vinyl coated

polyester (VCP) quilted to the sound

absorber rather than

the standard 4 oz. facing.

• STC 29 Rating, NRC .65

25

TAN

Durisol® is the proprietary

name of a durable,

lightweight and cementitous

composition. It is made of

chemically neutralized and

mineralized organic

softwood shavings which are

specially processed to an

acoustically engineered size

and are bonded together

under pressure with Portland

cement.

The material is sound-

absorbent, noncombustible,

vermin and rot proof.

Durisol® is self-draining and

highly resistant to weather

exposure including: freeze-

thaw, road de-icing

chemicals and fungicides.

26

27

Grandstand Demo

& Removal of RW

Area

28

29

30

31

32

OU1: Former facility. Capped (complete)

OU2: Groundwater/Vapor Intrusion (ongoing)

OU3: Upper Ferry Creek (design)

OU4: Raybestos Memorial Ball Field (design)

OU5: Shore Rd/Housatonic Boat Club (ongoing)

OU6: Additional Fill Properties (design)

OU7: Lower Ferry Creek (investigation)

OU8: Beacon Point Boat Launch

(investigation)

OU9: Short Beach Park/Landfill (investigation)

Operable Units

Air Monitoring Overview

CT DPH

Connecticut Department of Public Health Keeping Connecticut Healthy

Connecticut Department of Public Health Keeping Connecticut Healthy

Air Monitoring at

Remediation Sites

Meg Harvey, MPH

CT Department of Public Health

Margaret.Harvey@ct.gov

860-509-7748

Raymark CAG Meeting

July 23, 2019

Goal = control dust using various measures

Real-time dust monitoring

Set action levels for dust based on chemicals

in soil (ug/m3 over specified time period).

Dust Action Level = Harmful Level

Dust Action Level = trigger for action

Lab Analysis for Chemicals in Air

Mixture of solid particles and liquid droplets

in air.

• Dust, dirt, soot, smoke, vehicle exhaust,

fumes, pollen, industrial emissions

Background levels of PM everywhere

EPA national air quality standards for PM

• 150 ug/m3 (24-hour average)

Goal = Exposure to chemicals in soil dust do

not pose a risk to health

Use standard risk assessment process

“permissible” level of chemical in air

Exposure assumptions, risk limits

Chemical concentration in soil

If multiple chemicals in soil, most

toxic/highest conc. chemical drives the action

level

Acceptable/Permissible Air Conc. (ug/m3)

Chemical Conc. in Soil (mg/kg) x 10-6 (kg/mg)

Assumes chemical concentration in airborne

dust is equal to concentration in source soil.

Lead Dust Action Level:

0.15 ug/m3 (National Ambient Air Quality Standard)

8,718 mg/kg (lead in soil @ OU4) x 10-6 kg/mg

= 17.2 ug/m3

Arsenic Dust Action Level:

0.0143 ug/m3 (EPA Regional Screening Level)*

10.4 mg/kg (arsenic in soil @ OU4) x 10-6 kg/mg

= 1,375 ug/m3

* EPA Regional Screening Levels calculated using site-specific exposures.

Draft Air Monitoring and Traffic Plans

USACE

Draft Perimeter Air Monitoring - Equipment • Plan includes both perimeter monitoring at OU4 and OU6, and

monitoring of personnel immediately in the work area (OSHA).

• OU4 Meters will include:

– Meteorological station and wind sock (upwind)

– One upwind dust meter and chemical sample station

– Two downwind dust meters and one chemical sample station

– Two downwind meters immediately around work areas

– One handheld dust meter for use immediately around work areas as

needed

• Action Levels derived using chemicals present in OU4 and OU6 site

soils.

Meteorological Station Dust Monitoring

Station

41

Draft Perimeter Air Monitoring – Response

Actions • Dust meters report 15-min average

• Exceedances of upwind dust + action level will trigger a text and

email to site personnel

• Response actions implemented if 15-min TWA value exceeded

– Identify source

– Document response actions implemented and results

• Stop Work Order issued if four consecutive exceedances of 15-min

TWA value

• Response actions may include:

– Wetting of excavation/truck disposal areas and grading areas

– Temporary cover over soil stockpiles with geotextile

– Water spray work areas/misting stations

– Foam dust suppression

– Install wind barriers immediately around work areas

– Reduce work areas or rate of operation (grading, soil volumes, etc.)

– Tent Sprung Structure to contain unloading area

42

Draft Perimeter Air Monitoring - Reporting

• Daily reports - review of data/response actions and evaluation of

planned activities

• Weekly reports:

– Date, weather conditions

– Dust measurements shown in graph form (min, max and daily average

concentrations); Detailed data appended to weekly report

– Identify exceedances of upwind + action level, source of dust and

response actions

– Document reduction in dust levels or Stop Work Order and actions

– Chemical analytical results of dust concentrations (pending lab data

turnaround)

• Working with Town and EPA to post weekly reports on website for

public access/review.

• Looking for public input on sharing of dust monitoring results

• Send comments/suggestions to: Michael.S.Looney@usace.army.mil

and dilorenzo.jim@epa.gov

43

Draft Traffic Management Plan

• Manage traffic impacts – can’t improve existing conditions

• Gradual truck traffic increase 2019-2020 incorporating lessons

learned and in coordination w/ other construction projects

• Route requirements:

– Avoid residential streets, schools and parks wherever possible (Wooster Park

using Rte 108)

– Avoid school bus routes wherever possible

– Avoid Patterson Avenue and Frog Pond Lane (except 3 East Main St properties)

– Utilize new access road from Longbrook Ave through Contract Plating to OU4

– Avoid low bridges

– Construction limited 7:00 am to 6:00 pm M-F; typical day 7:00 am - 3:30 pm. No

nights or weekends.

– Utilize police details for all truck entering/exiting at Longbrook Avenue and

OU3/OU6 properties

• Potential changes – evaluate Exit 33 for I-95S and Exit 34 for I-95N

bound truck traffic instead of Exit 32

44

Draft Traffic Management – Truck Routes

45

• View PDF Files

Draft Traffic

Management Plan

PHC Soil to Offsite Landfill • Direct haul to New Haven for rail

transport (Indiana landfill)

• Intermodal container with zippered

liner and locking cover

Impacted Soil to OU4: • Locking covers and leak proof truck

gate

• Decontamination of trucks prior to

entering public roadways and prior

to exiting OU4 Includes tire wash

• Treatment of wash water and

sediment

• OU3 soil will be wet (transferred in

sealed trucks) and stabilized at

OU4

• Inspection of trucks exiting

OU3/OU6 sites and OU4

• Trucks labeled transporting

impacted soil and imported clean

soil for site restoration

• Officer directing trucks into sites

and onto roadways

46

OU6 Soil Transport

OU3 Soil

Transport

Truck

Placard

Questions?

O Please ask questions relevant to the topics

discussed

O If you don’t want to ask your question now, write

it on the notecard and place it in the basket on

the way out.

O Include your name and contact information

O Comments also welcome on notecard

O If you feel your question was not fully answered,

write it out and place it in the basket

Next Meeting

OTuesday, August 27 at 6:30

p.m.

ORoom 110 of the Birdseye

Municipal Complex

Thank you for coming!

O Visit www.townofstratford.com/Raymark for

updates

O Remember to sign in