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

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1 I

-------------

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RESIDENTIAL.AREA

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CROP PRODUCTION SERVICES _ _ PREMIER AG -/------- -- ·- \ .\

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RESIDENTIAL AREA

AGRICULTURAL FIELD

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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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IDWER FORSYTHE STREET

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 --------

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Groundwater Flow Direction

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Unit C

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52

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