raymark community advisory group meeting · raymark community advisory group meeting author: alivia...
TRANSCRIPT
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
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: [email protected]
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