Post on 19-Jul-2020
Motria Caudill, PhD
Environmental Health Scientist
Public Meeting
June 5, 2019
Division of Health Assessment and Consultation
Agency for Toxic Substances and Disease Registry
Agency for Toxic Substances and Disease Registry (ATSDR)
Health Consultation
Amphenol Facility Franklin, Indiana
Who is ATSDR ?
A public health agency within the U.S. Department of Health and Human Services. Located in Atlanta, GA with 10 Regional Offices, including Chicago, IL.
❑ Not a regulatory or enforcement agency
❑ Address health issues associated with hazardous materials in the environment
ATSDR works with communities, local, state,
tribal governments, and other federal agencies
to protect people from environmental exposures
ATSDR does this by investigating chemical exposures, recommending actions to protect people, educating the public, and conducting
research to protect health
ATSDR Public Health Consultation Process
Environmental Data
Community Characteristics
and Input
What are contaminant
levels?
How do people contact tlJi contaminants? - exposure
~ Could exposure lead to illness?
Are there relevant .. health data? ~
Is the exposure a problem?
What needs to be done?
• For more information about ATSDR’s public health activities at this site, please contact:
• Motria Caudill, PhD, Environmental Health Scientist
• (312)-886-0267
• mcaudill@cdc.gov
• For more information about ATSDR visit:
• 1-800-CDC-INFO (232-4636)/TTY: 1-888-232-6348
• Email: cdcinfo@cdc.gov
• Web: www.atsdr.cdc.gov
U.S. Environmental Protection Agency
Vapor Intrusion Investigation Status and Results
and
Sewer Line Remedy
Former Amphenol Site
Public Information Session
Franklin, IN
June 5, 2019
10
11
Former Amphenol site in Franklin, IN
11
Study
Area
Former
Amphenol
site
.FRANKLIN
N
A
PRESENTATION OVERVIEW
o Vapor Intrusion Investigation Status, Results, Mitigation Work
o Sewer Line Remedy
o What’s Next
Brief History of Site
1990's Investigations: groundwater, soil, creek1996 Vapor Intrusion Risk Assessment concluded no risk to the neighborhood from groundwater plume(study method and health benchmarks at the time)
1994 to Present - Groundwater pump and treat remedy (267,141,650 gallons to-date)
August 3, 2018 Public Meeting:
EPA will "start from scratch"
Several investigations completed since July 201813
Conceptual Site Model
Is contamination still in neighborhood?How far did contamination travel?
Are homes being impacted by vapors?Vapor Intrusion Study
CSM starting from what we know:
• Sewers were a primary conveyance of solvents to neighborhood, 1961 through 1983
• 1990's investigation under EPA Order reported neighborhood chemical contamination in groundwater and chemical vapors in soil
14
Vapor IntrusionStudy Area
Basis of Study Area and conceptual site
model:
• Historic data
• Groundwater flow direction
• Sewershed flow direction
• New sampling in 2018 and 2019
15
16
Where is the contamination in -
Groundwater?
Sewer vapors?
Soil around the sewers?
Outdoor air?
Are homes impacted by Vapor Intrusion?
Sampling Completed to Support CSMand Decision-Making
Rek:Ese to grourd
surface
Aquifer
,______.I .__I _ __.I .__I _ __.
lnfi It ration of Pre:: i pitat ion
( c' (_ ·' y
Advectiofl. Dis persio I'\ and Diffusion
S lab-o ni:J @de
Se-ver Lateral
Basement
□□ □
)
..£.!uc t uat i rg t Water Table t
Crawl Space
□□
Se\4ter Lateral
I nfi It rat ion and G rou nd~1ater
Recharge
.; ~ t -Clean Groundwater
Plume with vapor-forming chemicals
G rou rdwater Flow
18
Migration of soil vapors via sewer to indoor air
Downstream Manhole
ft EA~United States .._._.~ Environmental Protection ,, Agency
Solvents that were released into the sewers historically leaked into the
surrounding sewer trench soils.
Conceptual Site Model Update- Questions answered by data
First –
Groundwater, soil, sewer vapor sampling indicated:
Potential complete exposure pathways to indoor air via
Contaminated groundwater
Connection to the sewer mains
Next –
Indoor air testing demonstrated
Complete exposure pathways
19
20
Groundwater Sampling ResultsTCE/PCE
ft EA~UnitedStates GRQLJNDW'/\'JER TCE ~ Environm ental Protection f"\. (WATER TABLE) ~., Ag ency
1-0RMER ARVIN MERITOR
=~m,oo~~ -· ~ 0
FORMER AMPHENOL RFI/CMS; 980 HURRICANE ROAD, FRANKLI N, IN DIANA
AGfUClA. TVfW. FIELD
1 I
-------------
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/
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RESIDENTIAL.AREA
21TCE SEWER GAS
CROP PRODUCTION SERVICES _ _ PREMIER AG -/------- -- ·- \ .\
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RESIDENTIAL AREA
AGRICULTURAL FIELD
~ /2 I c-·, \ , , I I j , \, __ -_/
42 Homes Identified for Indoor Air Testing
Results: 15 homes had remediation work
(30 homeowners granted access)
Indoor air exceedances: 5
Indoor air exceedance due to sewer gas: 2
Indoor air exceedance due to soil gas: 1
Indoor air exceedance due to soil and sewer gas: 2
Sub-slab or outdoor soil gas exceedances: 6
Sewer line main vapor exceedances: 19
22
Response ActionsImpact from groundwater
• Vapor mitigation systems recommended: 6
(any home with sub-slab exceedance regardless of indoor air result)
• Installed: 5 (one homeowner declined)
EPA will go door-to-door to try to get access for testing in the remaining 12 homes.
23
24
Five Homes Vapor Intrusion Mitigation System(Groundwater Migration Pathway)
• Sub-Slab Depressurization System
• Similar to radon gas mitigation system
• Suction ”negative pressure” used under building
• Prevents vapors from entering structure
i
Fan
-► . --:- .. ;. Contam -etion
C • •
' . ,. ~-'\ I t
Response ActionsSewer Line Home Plumbing System Repairs
detected and repaired: 9 homes
• Plumbing exhaust that vented inside attics were rerouted to out the roof
• Vapor leaks observed around toilet flanges were replaced and toilets reset.
• Leaking sanitary lines were sealed at the slab entry point and other joints.
• Plumbing vents beneath sinks were sealed. 25
Remedial Sequence
1) Make homes safe - mitigate indoor air impacts in homes
Vapor mitigation systems installed – 5 homes
Sewer system repairs – 9 homes
2) Current: Sewer line remedy
Draft pre-design being revised based on EPA review
Next design document mid-June
3) On-site source area remedy
Soil sampling begun Feb-March, continuing this summer, evaluating injections to enhance VOC destruction
4) Groundwater Pump and Treat System Optimization
5) Off-site Groundwater remedy
Investigate options26
Preliminary Remedy Overview
Amphenol – City of Franklin cooperation under EPA
oversight and requirements
• Forsythe and Hamilton Streets
• North to south progress
• Excavation of soil and placement on roll-off boxes
• Temporary storage of dug up material on site
• IDEM disposal determination
27
Sewer RemedySeveral steps to completion
Approximate timeline 6 months, 90-day construction period
28
❖ Engineering design work plan approval
❖ Engineering design and bid specifications
❖ Contract bidding and award
❖ Remediation waste determination
❖ Permits: Sanitary sewer construction
❖ Sanitary Sewer Discharge
❖ Stormwater Pollution Prevention
Plan
❖ Excavation, sewer installation and re-lining,
backfill, street repaving
Remedial Goals
Prevent vapor intrusion into buildings via sewersSewer replacement and lining to:
- Prevent and/or minimize impacted groundwater infiltration into the sanitary sewer main and residential laterals
- Remove impacted soil around the sanitary sewer main to prevent vapor infiltration
29
30
ft EA~ United States 111ii..•~ Environmental Protection ~, Agency
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UPPER FORSYTHE STREET
PRELIMINARY SANITARY SEWER DESIGN PLAN FORSYTHE STREET
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FORMER AMPHENOL RFI/CMS; 980 HURRICANE ROAD, FRANKLIN , INDIANA
t . ., ' ~ Rev. 5/6/19
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31
Excavation of soil – Amphenol
Placement of clean fill and street restoration – Franklin
32
Replacement or relining of sewer line segments
based on condition of segment
Remedy Overview, cont’dEPA Requirements to contain contamination
and keep workers safe
33
• Health and Safety Plans • Materials Management Plan • Stormwater Pollution Prevention Plan • EPA requirements include VOC and particulate air
monitoring at perimeter• Construction shut down requirement if criteria are
exceeded until conditions change• Design to minimize inconvenience to residents• Where needed, groundwater will be pumped to mobile
tanks for treatment• Confirmatory sampling• Treated water sent to POTW
Note on Indoor air sampling in homes
• Access Please grant access
EPA will be going door-to-door
• Privacy Act You don’t have to share results
• All homes will have a minimum of two sampling events
34
Strategy – Former Amphenol Site
Next Steps
1. Investigate and remediate source-areas on-
site
2. Evaluate old and new remedies
3. Remedy selection
4. Monitor and re-evaluate the vapor intrusion
pathway
35
36
Bigger picture around
the Amphenol Site
Who is responsible and
Who to contact
Handout near poster in
Lobby
_ ........... :
Franklin Schools contact Jeff Sewell
Community Involvement Coordinator Direc tor of Opera tions
Study Area -e- Sanitary Sewer Lines
Amphenol TCE Groundwater Plume (TCE concentrations> 1.2 ug/L)
· .. · Tentative Plume Boundary
(317) 346-8741 sewelJj@franklinschools.org
Sources: Johnson Co, IN Sewer data 5/19
TCE concentrations - IWM Consulting 4/3/19 ESRI Imagery layer 2019
US EPA RS LCD: LS 613119
Thank you!
Questions after presentations
Next presenter,
Trent Newport
CrossRoad Engineers
37
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Project Information
• All project work to be in existing Right of Way except sanitary lateral work. Individual right of entries will be obtained for this work.
• Individual meetings will be held to discuss any interruptions to driveway access within project limits. Otherwise, access will be maintained to all drives within the project limits from at least one direction (north or south).
• We will communicate with all emergency services to ensure access to all homes during construction.
• We will coordinate with school for bus pick up location and communicate to all residents.
• Contact information for all questions/concerns regarding construction project:
Brad Stahley Trent Newportbstahley@crossroadengineers.com tnewport@crossroadengineers.com(317) 417-4126 (317) 502-2760
Project Schedule
• Project to bid in July• New water main installation – approximately 45 days / start
in July• Soil removal, sanitary sewer replacement, and road
reconstruction – approximately 3 months• Project expected to be completed by end of 2019
construction season. At a minimum it would be open to traffic by end of 2019 construction season and then asphalt surface installed in spring of 2020.
• Final yard restoration will be in late 2019 with any re-work necessary to be completed in spring of 2020.
• Project Newsletters will be distributed to update on schedule throughout life of the project.
48
Questions?
SLIDES USED DURING Q&A
49
50
Stage 1
Unit A ----------------------- Flood Plain -- =--------------------------------
Stream Stage
Groundwater Flow Direction
Unit B
Unit C
--------------------------------- ~ ----- 1 ~ --- ----- --
Stream
51
Unit A --------
Stage 2
Flood Plain -------------- w --------- - ---------------- ------------
Stream Stage
Groundwater Flow Direction
Unit B
Unit C
------ ---- __ ,-------- _,--- +-...... __ ,._, --------------------------- ----W_
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52
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Unit C
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