## HAZARD RANKING SYSTEM ( HRS ) DOCUMENTATION RECORD

- REVIEW COVER SHEET

Name of Site: West Vermont Drinking Water Contamination

U.S. EPA ID No. INN000510429

Date Prepared: September 2015

Contact Persons

Documentation Record: Mark Jaworski Site Investigation Program, Federal Programs Section Indiana Department of Environmental Management (317 ) 23 3

- 2407

Pathways, Components, or Threats Not Scored

Surface Water Migration Pathway, Soil Exposure Pathway, and Air Migration Pathway:

The Surface Water Migration Pathway, Soil Exposure Pathway, and Air Migration Pathway were not scored as part of this Hazard Ranking System (HRS) evaluation. These pathway s were not included because a release to these media does not significantly affect the overall score and because the ground water pathway produces an overall score above the minimum requirement for the West Vermont Drinking Water Contamination to qualify f or inclusion on the National Priorities List (NPL).

## 1 HRS DOCUMENTATION RECORD

N ame of Site: West Vermont Drinking Water Contamination

EPA Region: 5

Street Address * : The intersection of West Vermont Street and Cossell Road

, (Figure 1

- 3 of th is HRS Documentation Record)

Date Prepared: September

, 201 5

City, County, State , Zip Code : Indianapolis

, Marion County, Indiana , 46222

General Location in the State: Central Indiana (Figure 1

- 1 of this HRS Documentation Record)

Topographic Map: Indianapolis West , Indiana Quad (7.5’) (Ref . 3)

Latitude: 39 .772453 North

Longitude: 86.228934 West

Reference Point : The intersection of West Vermont Street and Cossel l Road. (Figure 1

- 3 of this HRS Documentation Record)

C on g r e ss i o n al D is t r ict: 7

Scores for West Vermont Drinking Water Contamination

Air Pathway Not Scored Ground Water Pathway 100.00 Soil Exposure Pathway Not Scored Surface Water Pathway Not Scored HRS SITE SCORE 50.00

*The street address, coordinates, and contaminant locations presented in this HRS d ocumentation

r ecord identify the general area the site is located. They represent one or more locations EPA considers to be part of the site based on the screening informati on EPA used to evaluate the site for NPL listing. EPA lists national priorities among the known "releases or threatened releases" of hazardous substances; thus, the focus is on the release, not precisely delineated boundaries. A site is defined as where a hazardous substance has been "deposited, stored, disposed, or placed, or has otherwise come to be located." Generally, HRS scoring and the subsequent listing of a release merely represent the initial determination that a certain area may need to be address ed under CERCLA. Accordingly, EPA contemplates that the preliminary description of facility boundaries at the time of scoring will be refined as more information is developed as to where the contamination has come to be located.

## 2 WORKSHEET FOR COMPUTING HRS SITE SCORE

S S 2



## 1. Ground Water Migration Pathway Score (S gw 

## )
100.00 10,000.00

2a. Surface Water Overland/Flood Migration Component (from Table 4

- 1, line 30) NS *

2b. Ground Water to Surface Water Migration Component (from Table 4

- 25, line 28) NS

2c. Surface Water Migration Pathway Score (S sw 

## ) Enter the larger of lines 2a and 2b as the pathway

score. NS

3. Soil Exposure Pathway Score (S s 

## ) (from Table 5

- 1, line 22) NS

4. Air Migration Pathway Score (S a 

## ) (from Table 6

- 1, line 12) NS

5. Total of S gw 2 

## + S sw 2 

## + S s 2 

## + S a 2 

## 10,000.00

6. HRS Site Score Divide the value on line 5 by 4 and take the square root 50.00

Notes: * NS = Not Scored

## 3 HRS T able 3- 1

– Ground Water Migration Pathway Scoresheet

F actor Categories and Factors Maximum
Value Value Assigned
Likelihood of Release to an Aquifer:

1. Observed Release 550 550

2. Potential to Release:

2a. Containment 10 NS
2b. Net Precipitation 10 NS
2c. Depth to Aquifer 5 NS
2d. Travel Time 35 NS

2e. Potential to Release [lines 2a x (2b + 2c + 2d)] 500 NS

3. Likelihood of Release (higher of lines 1 and 2e) 550 550

Waste Characteristics:
4. Toxicity/Mobility ( a ) 10,000

5. Hazardous Waste Quantity ( a ) 100
6. Waste Characteristics 100 32 Targets :
7. Nearest Well 50 50
8. Population:
8a. Level I Concentrations ( b ) 30
8b. Level II Concentrations ( b ) NS
8c. Potential Contamination ( b ) 909 8d. Population (lines 8a + 8b + 8c) ( b ) 939
9. Resources 5 0
10. Wellhead Protection Area 20 0
11. Targets (lines 7 + 8d + 9 + 10) ( b ) 989 Ground Water Migration Score For An Aquifer:

12. Aquifer Score [(lines 3 x 6 x 11)/82,500] c


### 550 x 32 x 989 = 1 7, 406 ,4 0 0 /82,500 = 210.9 100 100.00

G round Water Migration Pathway Score:

13. Pathway Score (S gw 

### )

, (highest value from line 12 for al l a quifers evaluated) c 

### 100 100. 00

(a) Maximum value applies to waste characteristics category (b) Maximum value not applicable

c 

### Do not round to nearest integer NS - Not Scored

# G G 

# §  ̈ ¦

65



# §  ̈ ¦

69 

# §  ̈ ¦

70 

# §  ̈ ¦

74 

# §  ̈ ¦

74 

# §  ̈ ¦

65



# §  ̈ ¦

65



# §  ̈ ¦

64 

# §  ̈ ¦

94 

# §  ̈ ¦

80



# §  ̈ ¦

69



# §  ̈ ¦ 465 

# §  ̈ ¦

70

This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

Mapped By: Shane Moore, Office of Land Quality Date: 04/28/2015 Sources: Non Orthophotography Data - Obtained from the State of Indiana Geographical Information Office Library Orthophotography - Obtained from Indiana Map Framework Data (www.indianamap.org)

Map Projection: UTM Zone 16 N Map Datum: NAD83 

# West Vermont Drinking Water Contamination - EPA ID INN000510429 Speedway, Marion County, Indiana



# μ

Latitude: 39.7720520 Longitude: -86. 2294990 

# G

G 

## Center of Site

0 30 60 15 Kilometers

0 20 40 10 Miles



## 4

# ! (

! ( ! (

! (

! ( ! ( ! (

! ( ! ( ! ( ! ( ! (
! ( ! (

! ( ! (

! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

! ( ! ( E5AW8 and E5AW9 MW-WES-04B and MW-WES-04A

VOC ND

E5AW6 MW-1003-S3

VOC ND

W Michigan St

W Vermont St Grande Ave N Holt Rd

Holt Rd Cossell Rd Cossell Rd W Walnut St Olin Ave Tomlinson St
N Tibbs Ave

W Vermont St W 10th St

Olin Ave W Michigan St N Somerset Ave N Livingston Ave W North St N Lyons Ave N Rochester Ave
N Exeter Ave N Berwick Ave
N Luett Ave

Eagle Creek Little Eagle Creek Dry Run

Eagle Creek

Mill Run

R i s t o w

B r a n c hN Rybolt Ave BACKGROUND E5BH7 Well ID - WVS-11

VOC ND

BACKGROUND E5BH4 Well ID - WVS-10

VOC ND BACKGROUND E5BH3 Well ID - WVS-10

VOC ND BACKGROUND E5AZ3 Well ID - WVS-11

VOC ND

E5AW0 MW-135

VOC ND E5AT9 MW-154

VOC ND

E5AY1 MW-WES-01A

VOC ND E5AT2 MW-WES-05B

VOC ND E5AT1 MW-WES-05A

VOC ND

E5AT0 MW-WES-07

Vinyl Chloride 18 E5AW5 MW-1105-S3/4

VOC ND E5AW1 MW-10-1R

Trans_12_DCA 8.8 Cis_12_DCE 57

E5AS8RE MW-WES-03B

Vinyl Chloride 8

E5AS9 MW-WES-03A

Vinyl Chloride 1.7 E5AX2 MMW-P-10D

Trans_12_DCE 1.3

E5AX2DL MMW-P-10D

Cis_12_DCE 69 Vinyl Chloride 81 E5AW1DL MW-10-1R

TCE 670 Cis_12_DCE 59

E5AS4 4018 W Vermont St

Vinyl Chloride 4.9

E5AS6RE 4012 Cossell Rd

Vinyl Chloride 1.4 E5AZ1DL WasteWater

Cis_12_DCE 2.1 Vinyl Chloride 0.69

E5AS7 4012 Cossell Rd

Vinyl Chloride 4.8 E5AT7DL MW-WES-09S

Cis_12_DCE 4.5 Vinyl Chloride 170

E5AX3DL MW-WES-02B

Cis_12_DCE 16 Vinyl Chloride 0.82 E5AW3DL MW-WES-08S

Cis_12_DCE 290

E5AX5 MW-WES-02C

Cis_12_DCE 0.83 Vinyl Chloride 5.4

E5AT7 MW-WES-09S

Cis_12_DCE 4.8 Vinyl Chloride 170

E5AX1 MMW-P-06

Trans_12_DCE 23

E5AX1DL MMW-P-06

Cis_12_DCE 190 Vinyl Chloride 350 E5AS5 4020 Cossell Rd

VOC ND E5AW3 MW-WES-08S

Vinyl Chloride 19

E5AW4 MW-WES-08D

Cis_12_DCE 17 Vinyl Chloride 1.4

E5AX3 MW-WES-02B

Trans_12_DCE 0.90

E5AX4 MW-WES-02B

Cis_12_DCE 13 Trans_12_DCE 0.85 Vinyl Chloride 7.3

E5AY2DL MW-WES-01B

Vinyl Chloride 3.2 E5AT5DL MW-WES-06S

Vinyl Chloride 41

E5AT6DL MW-WES-06D

Vinyl Chloride 67 E5AT8DL MW-WES-09D

Vinyl Chloride 37 E5AW2DL MW-148R

TCE 100 Cis_12_DCE 29

E5AT4 MW-WES-06S

Vinyl Chloride 4.7

E5AY3DL MW-WES-01B

Vinyl Chloride 3.0

E5AY4 MW-WES-01C

Vinyl Chloride 1.2 E5AT3 MW-WES-05C

Vinyl Chloride 13 E5AW2 MW-148R

11_DCA 1.4 Trans_12_DCE 6.4

E5AX0 MW-WES-02A

Cis_12_DCE 18 Trans_12_DCE 2.4

E5AY3 MW-WES-01B

Vinyl Chloride 29 BACKGROUND E5BH3DL Well ID - WVS-10

VOC ND

BACKGROUND E5BH4DL Well ID - WVS-10

VOC ND BACKGROUND E5AZ2 Well ID - WVS-10

VOC ND

State of Indiana 2011

This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

Mapped By: Shane Moore, Office of Land Quality Date: 08/17/2015

Sources: Non Orthophotography Data - Obtained from the State of Indiana Geographical Information Office Library Samplling Data is from IDEM SampDB Orthophotography - Obtained from Indiana Map Framework Data (www.indianamap.org) Map Projection: UTM Zone 16 N Map Datum: NAD83 

# μ West Vermont Drinking Water Contamination INN000510429 Ground Water Plume Map Showing Sample Concentrations of VOCs Speedway, Marion County, Indiana



# §  ̈ ¦

465 

# §  ̈ ¦

65 

# §  ̈ ¦

70 

# §  ̈ ¦

74 

# §  ̈ ¦ 70_D 

# §  ̈ ¦

465

Marion Hendricks

Johnson Morgan Boone Hamilton 

### Marion County



# ! ( Sample Points (ug/L)
Approximate Ground Water Plume Boundary



### 0 300 600 150 Meters

0 1,000 2,000 500 Feet Figure 1-2 Ground Water Plume Area 20.2 Acres

The Approximate Ground Water Plume was digitized by connecting sample locations with concentration levels of concern for contaminates City Park



## 5

# ! C
! C

! C

G TIBBS AV NORTH ST LUETT AV

VERMONT ST MICHIGAN ST WALNUT ST EXETER AV HOLT RD

ALTON AV BERWICK AV SOMERSET AV LIVINGSTON AV ROCHESTER AV GARDEN AV

COSSELL RD CENTENNIAL ST OLIN AV

GROFF AV ST CLAIR ST

NEW YORK ST WILCOX ST MORELAND ST INV ST 6

VERMONT ST

VERMONT ST WALNUT ST

WILCOX ST

State of Indiana 2011

This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

Mapped By: Shane Moore, Office of Land Quality Date: 01/13/2015

Sources: Non Orthophotography Data - Obtained from the State of Indiana Geographical Information Office Library Orthophotography - Obtained from Indiana Map Framework Data (www.indianamap.org) Map Projection: UTM Zone 16 N Map Datum: NAD83 

# μ West Vermont Drinking Water Contamination With Near By Potential Sources Speedway, Marion County, Indiana

Marion Hendricks

Johnson

Morgan Boone Hamilton

Shelby Hancock 

### Marion County



## Residence of Concern 

# G West Vermont Drinking Water Contamination 

# ! C Potential Source
Area of Residences Supplied by Private Ground Water Wells 0 175 350 87.5 Meters

0 560 1,120 280 Feet Longitude: -86.228934 Latitude: 39.772453 Allison Transmission

Genuine Parts

Michigan Plaza



## 6

## Figure 1-4 Source and Background Sampling Locations Map West Vermont Groundwater Contamination OS West Vermont Street and Cossell Road

Speedway, Marion County, Indiana

Prepared For: EPA Prepared By: Tetra Tech Inc.

EPA Contract No.: EP-S5-13-01 TDD No.: S05/0001-1404-009 Source: Bing Maps Hybrid, 2011-2012

Date Saved: 4/16/2015File Path: G:\G\G9026-START IV\Indiana\West Vermont\mxd\2015-03\Fig1-4_Source&BackgroundSamples.mxd

100 0 100

Feet

Coordinate System: NAD 1983 UTM Zone 16N Projection: Transverse Mercator Datum:North American 1983 Units: Foot US Legend
Soil Boring Location
Background Sample Location

Excavation Area
Study Area

Allison Transmission Site Genuine Auto Parts Site
Michigan Plaza Site
Michigan Meadow Apartments

Residential Area



## 78/3/2015 X:\OLQ\OLQGIS\Projects\WestVermont-MichiganPlaza\TetraTech\Fig1_5_idem.mxd m.banh 1/4 Mile 1/2 Mile 1 Mile 2 Miles 3 Miles 4 Miles

2 7R WR7
WR8

RS26 RS22

RS27 RSB

RSD

RS7 Genuine Auto Parts Source Area

Michigan Plaza

Source Area RS9 RSC

6

RS8 13 RS18 WR9

RS19 12

14R

3 4 WR3

RS29 RS02 10R

9 RS17

RSA

8R

15 11R

DNR 179985 DNR 414789

Riverside Well (RS)

Speedway Well

White River Well (WR)

* DNR Well Area of Residences Supplied by Private Ground Water Wells - West Vermont Street/Cossell Road Area of Residences Supplied by Private Ground Water Wells - Fleming Street/Vine Street

Prepared For: EPA Prepared By: Tetra Tech Inc. 

### * Figure 1-5 4-Mile Radius Map Genuine Auto Parts and Michigan Plaza West Vermont Groundwater Contamination OS West Vermont Street and Cossell Road

Speedway, Marion County, Indiana

Date Saved: 8/3/2015 EPA Contract No.: EP-S5-13-01 TDD No.: S05/0001-1404-009 Source: USGS 7.5-Minute Topographic Quadrangle Map, Indianapolis West, IN 1998 

# ±

0.5 0 0.5

Miles Source area = outline of the outer most source sample locations. Coordinate System = NAD 1983 State Plane Indiana East-Feet 

# * = Indiana Department of Environmental Managment (IDEM) Addedl/Modified Information to Tetra Tech Figure 1-5 Map *This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

*Mapped By: Shane Moore Office of Land Quality *Date Modified: Aug. 3, 2015 

### *Well Name *Distance from
Genuine Auto Parts (Mile) *Distance from Michigan Plaza (Mile) Speedway 2 1.367 1.526 Speedway 3 1.683 1.787 Speedway 4 1.701 1.808 Speedway 6 1.360 1.515 Speedway 7R 1.489 1.642 Speedway 8R* 1.936 2.057 Speedway 9 2.144 2.281 Speedway 10R* 1.897 2.041 Speedway 11R* 2.309 2.471 Speedway 12 2.363 2.528 Speedway 13 2.097 2.269 Speedway 14R 2.267 2.424 Speedway 15 1.475 1.576 Riverside RS2 2.473 2.446 Riverside RS7 2.298 2.238 Riverside RS8 2.289 2.235 Riverside RS9 2.317 2.266 Riverside RS17 2.126 2.135 Riverside RS18 2.063 2.093 Riverside RS19 1.925 1.965 Riverside RS22 2.470 2.452 Riverside RS26 2.368 2.330 Riverside RS27 2.437 2.387 Riverside RS29 2.202 2.151 Riverside RSA 2.384 2.379 Riverside RSB 2.351 2.358 Riverside RSC 2.279 2.251 Riverside RSD 2.351 2.303 White River WR3 3.088 3.066 White River WR7 3.054 3.043 White River WR8 3.022 3.004 White River WR9 2.926 2.919
DNR Reference Number 414789 1.057 1.175
DNR Reference Number 179985 1.880 1.800



## 8

### 4140 W Vermont St 7/7/2010 Vinyl chloride 2.1ug/L

4044 W Vermont St 7/7/2010 Vinyl chloride 4.7ug/L 7/7/2010 cis-1,2-Dichloroethylene 1.6ug/L 4012 Cossell Rd 7/7/2010 Vinyl chloride 13ug/L

12/12/2011 Vinyl chloride 26.1ug/L 4031 Cossell Rd 7/7/2010 Tetrachloroethylene 1.5ug/L

4018 W Vermont St 7/7/2010 Vinyl chloride 1.1ug/L 7/7/2010 Vinyl chloride 1.6ug/L

12/12/2011 Vinyl chloride 4.8ug/L 4042 W Vermont St 7/7/2010 Tetrachloroethylene 1.7ug/L

VERMONT ST MICHIGAN ST

State of Indiana 2011

This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

Mapped By: Shane Moore, Office of Land Quality Date: 04/13/2015

Sources: Non Orthophotography Data - Obtained from the State of Indiana Geographical Information Office Library Samplling Data is from IDEM SampDB Orthophotography - Obtained from Indiana Map Framework Data (www.indianamap.org) Map Projection: UTM Zone 16 N Map Datum: NAD83 

# μ West Vermont Drinking Water Contamination EPA Residential Sampling Speedway, Marion County, Indiana

Marion Hendricks

Johnson

Morgan Boone Hamilton

Shelby Hancock 

### Marion County

Sampling Location
0 50 100 25 Meters

0 170 340 85 Feet



## 9MW-WES-03A 2/17/2014 Vinyl chloride 2ug/L MW-WES-08D 2/20/2014 Vinyl chloride 3.2ug/L 2/20/2014 cis-1,2-Dichloroethylene 28.3ug/L 3/20/2014 cis-1,2-Dichloroethylene 21.3ug/L

MW-WES-07 2/20/2014 Vinyl chloride 10ug/L 3/20/2014 Vinyl chloride 7.7ug/L MW-WES-06D 2/19/2014 Vinyl chloride 115ug/L 3/20/2014 Vinyl chloride 66.9ug/L 3/20/2014 Vinyl chloride 66.1ug/L

MW-WES-06S 2/19/2014 Vinyl chloride 74.1ug/L 3/20/2014 Vinyl chloride 47.2ug/L

MW-WES-03B 7/23/2013 Vinyl chloride 9.4ug/L 9/10/2013 Vinyl chloride 7.5ug/L 10/8/2013 Vinyl chloride 5.8ug/L 11/19/2013 Vinyl chloride 10.7ug/L 12/11/2013 Vinyl chloride 5ug/L

1/20/2014 Vinyl chloride 10.9ug/L 2/17/2014 Vinyl chloride 11.4ug/L 3/17/2014 Vinyl chloride 9.1ug/L MW-WES-09D 2/19/2014 Vinyl chloride 48.9ug/L 2/19/2014 Vinyl chloride 46.4ug/L 3/20/2014 Vinyl chloride 31.7ug/L

MW-WES-02C 9/11/2013 Vinyl chloride 3.2ug/L 10/9/2013 Vinyl chloride 3.3ug/L

2/19/2014 Vinyl chloride 2.8ug/L 3/19/2014 Vinyl chloride 2.7ug/L

MW-WES-01C 9/11/2013 Vinyl chloride 11.3ug/L 10/9/2013 Vinyl chloride 13.5ug/L 10/9/2013 Tetrachloroethylene 7.4ug/L 11/20/2013 Vinyl chloride 18.1ug/L

1/25/2014 Vinyl chloride 19.7ug/L 1/25/2014 Vinyl chloride 21ug/L 2/18/2014 Vinyl chloride 23.3ug/L 3/19/2014 Vinyl chloride 13.7ug/L MW-WES-01B 9/11/2013 Vinyl chloride 43.4ug/L 10/9/2013 Vinyl chloride 19.8ug/L 11/20/2013 Vinyl chloride 38.7ug/L

2/18/2014 Vinyl chloride 33.3ug/L 3/19/2014 Vinyl chloride 27.8ug/L 3/19/2014 Vinyl chloride 23.2ug/L MW-WES-08S 2/20/2014 Vinyl chloride 24.4ug/L 2/20/2014 cis-1,2-Dichloroethylene 298ug/L 3/20/2014 Vinyl chloride 20.4ug/L 3/20/2014 cis-1,2-Dichloroethylene 269ug/L

MW-WES-02B 9/11/2013 Vinyl chloride 6.8ug/L 9/11/2013 cis-1,2-Dichloroethylene 5.4ug/L 10/9/2013 Vinyl chloride 6.7ug/L 10/9/2013 cis-1,2-Dichloroethylene 7.2ug/L 11/20/2013 Vinyl chloride 7.9ug/L 11/20/2013 cis-1,2-Dichloroethylene 7.9ug/L

1/21/2014 Vinyl chloride 7.5ug/L 1/21/2014 cis-1,2-Dichloroethylene 9.5ug/L 2/19/2014 Vinyl chloride 6.2ug/L 2/19/2014 cis-1,2-Dichloroethylene 10.2ug/L 2/19/2014 Vinyl chloride 6.7ug/L 2/19/2014 cis-1,2-Dichloroethylene 11ug/L 3/19/2014 Vinyl chloride 3.7ug/L 3/19/2014 cis-1,2-Dichloroethylene 8.9ug/L MW-WES-09S 2/19/2014 Vinyl chloride 151ug/L 2/19/2014 cis-1,2-Dichloroethylene 12.1ug/L 3/20/2014 Vinyl chloride 133ug/L 3/20/2014 cis-1,2-Dichloroethylene 7.1ug/L MW-WES-02A 9/11/2013 cis-1,2-Dichloroethylene 13.5ug/L 10/9/2013 cis-1,2-Dichloroethylene 13.4ug/L 11/20/2013 cis-1,2-Dichloroethylene 11.8ug/L

1/21/2014 cis-1,2-Dichloroethylene 13.2ug/L 2/19/2014 cis-1,2-Dichloroethylene 18.1ug/L 3/19/2014 cis-1,2-Dichloroethylene 17.8ug/L NORTH ST

MICHIGAN ST ALTON AV EXETER AV
BERWICK AV WALNUT ST LUETT AV

VERMONT ST SOMERSET AV LIVINGSTON AV ROCHESTER AV

WILCOX ST

NEW YORK ST HOLT RD

VERMONT ST ALTON AV BERWICK AV VERMONT ST

State of Indiana 2011

This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

Mapped By: Shane Moore, Office of Land Quality Date: 04/13/2015

Sources: Non Orthophotography Data - Obtained from the State of Indiana Geographical Information Office Library Samplling Data is from IDEM SampDB Orthophotography - Obtained from Indiana Map Framework Data (www.indianamap.org) Map Projection: UTM Zone 16 N Map Datum: NAD83 

# μ West Vermont Drinking Water Contamination Monitoring Well Sampling - EPA 2013, 2014 Speedway, Marion County, Indiana

Marion Hendricks

Johnson

Morgan Boone Hamilton

Shelby Hancock 

### Marion County

Sample Locations
0 125 250 62.5 Meters

0 425 850 212.5 Feet



## 108/10/2015 X:\OLQ\OLQGIS\Projects\WestVermont-MichiganPlaza\IDEM\Fig1_8_idem.mxd m.banh 1/4 Mile 1/2 Mile 1 Mile 2 Miles 3 Miles 4 Miles

#2 #7R WR 7
WR 8

RS 26 RS 22

RS 27

RS 28 RS D

RS 7 Genuine Auto Parts Source Area RS 9 RS B

RS C #6

RS 8 #13 RS 18 WR 9

RS 19 #12

#14R

#3 #4 WR 3

RS 29 RS 2 #10R

#9 RS 17 RS A

#8R

#15 #11R

DNR 179985 DNR 414789

Riverside Well (RS)

Speedway Well

White River Well (WR)

* DNR Well

Area of Residences Supplied by Private Ground Water Wells - West Vermont Street/Cossell Road

Area of Residences Supplied by Private Ground Water Wells - Fleming Street/Vine Street

Prepared For: EPA Prepared By: Tetra Tech Inc. 

### * Figure 1-8 4-Mile Radius Map Genuine Auto Parts West Vermont Groundwater Contamination OS West Vermont Street and Cossell Road

Speedway, Marion County, Indiana

Date Saved: 8/10/2015 EPA Contract No.: EP-S5-13-01 TDD No.: S05/0001-1404-009 Source: USGS 7.5-Minute Topographic Quadrangle Map, Indianapolis West, IN 1998 

# ±

0.5 0 0.5

Miles Source area = outline of the outer most source sample locations. Coordinate System = NAD 1983 State Plane Indiana East-Feet 

# * = Indiana Department of Environmental Managment (IDEM) Addedl/Modified Information to Tetra Tech Figure 1-8 Map *This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

*Mapped By: Shane Moore Office of Land Quality *Date Modified: August 10, 2015 

## *Well Name *Distance from
Genuine Auto Parts (Mile) Speedway 2 1.367 Speedway 3 1.683 Speedway 4 1.701 Speedway 6 1.360 Speedway 7R 1.489 Speedway 8R* 1.936 Speedway 9 2.144 Speedway 10R* 1.897 Speedway 11R* 2.309 Speedway 12 2.363 Speedway 13 2.097 Speedway 14R 2.267 Speedway 15 1.475 Riverside RS2 2.473 Riverside RS7 2.298 Riverside RS8 2.289 Riverside RS9 2.317 Riverside RS17 2.126 Riverside RS18 2.063 Riverside RS19 1.925 Riverside RS22 2.470 Riverside RS26 2.368 Riverside RS27 2.437 Riverside RS29 2.202 Riverside RSA 2.384 Riverside RSB 2.351 Riverside RSC 2.279 Riverside RSD 2.351 White River WR3 3.088 White River WR7 3.054 White River WR8 3.022 White River WR9 2.926
DNR Reference Number 414789 1.057
DNR Reference Number 179985 1.880



## 118/10/2015 X:\OLQ\OLQGIS\Projects\WestVermont-MichiganPlaza\IDEM\Fig1-9_idem.mxd m.banh 1/4 Mile 1/2 Mile

1 Mile 2 Miles 3 Miles 4 Miles

#2 #7R WR 7
WR 8

RS 26 RS 22

RS 27

RS 28 RS D

RS 7

Genuine Auto Parts Source Area RS 9 RS B

RS C #6

RS 8 #13 RS 18 WR 9

RS 19 #12

#14R

#3 #4 WR 3

RS 29 RS 2 #10R

#9 RS 17 RS A

#8R

#15 #11R

DNR 179985 DNR 414789

Riverside Well (RS)

Speedway Well

White River Well (WR)

* DNR Well

Area of Residences Supplied by Private Ground Water Wells - West Vermont Street/Cossell Road

Area of Residences Supplied by Private Ground Water Wells - Fleming Street/Vine Street

Prepared For: EPA Prepared By: Tetra Tech Inc. 

### * Figure 1-9 4-Mile Radius Map

Michigan Plaza West Vermont Groundwater Contamination OS West Vermont Street and Cossell Road

Speedway, Marion County, Indiana

Date Saved: 8/10/2015 EPA Contract No.: EP-S5-13-01 TDD No.: S05/0001-1404-009 Source: USGS 7.5-Minute Topographic Quadrangle Map, Indianapolis West, IN 1998 

# ±

0.5 0 0.5

Miles Source area = outline of the outer most source sample locations. Coordinate System = NAD 1983 State Plane Indiana East-Feet 

# * = Indiana Department of Environmental Managment (IDEM) Addedl/Modified Information to Tetra Tech Figure 1-9 Map *This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

*Mapped By: Shane Moore Office of Land Quality *Date Modified: August 10, 2015 

## *Well Name *Distance from Michigan Plaza (Mile) Speedway 2 1.526 Speedway 3 1.787 Speedway 4 1.808 Speedway 6 1.515 Speedway 7R 1.642 Speedway 8R* 2.057 Speedway 9 2.281 Speedway 10R* 2.041 Speedway 11R* 2.471 Speedway 12 2.528 Speedway 13 2.269 Speedway 14R 2.424 Speedway 15 1.576 Riverside RS2 2.446 Riverside RS7 2.238 Riverside RS8 2.235 Riverside RS9 2.266 Riverside RS17 2.135 Riverside RS18 2.093 Riverside RS19 1.965 Riverside RS22 2.452 Riverside RS26 2.330 Riverside RS27 2.387 Riverside RS29 2.151 Riverside RSA 2.379 Riverside RSB 2.358 Riverside RSC 2.251 Riverside RSD 2.303 White River WR3 3.066 White River WR7 3.043 White River WR8 3.004 White River WR9 2.919
DNR Reference Number 414789 1.175
DNR Reference Number 179985 1.800



## 12

### 4017 Cossell Rd 1/13/2010 Vinyl chloride ND 4018 Cossell Rd 12/2 9 /2009 Vinyl chloride ND

4012 Cossell Rd 12/1/2009 Vinyl chloride 62.7ug/L 12/29/2009 Vinyl chloride 45.8ug/

4044 W Vermont St 12/11/2009 Vinyl chloride ND

11/4/2010 Vinyl chloride ND 4018 W Vermont St 6/11/2009 Vinyl chloride 4.5ug/L 7/22/2009 Vinyl chloride 5.1ug/L 7/27/2009 Vinyl chloride 4.3ug/L 8/5/2009 Vinyl chloride 4.6ug/L 8/12/2009 Vinyl chloride 5.6ug/L 8/20/2009 Vinyl chloride 5.2ug/L 8/27/2009 Vinyl chloride 1.3ug/L 9/3/2009 Vinyl chloride 4.5ug/L 9/10/2009 Vinyl chloride 3.6ug/L 9/17/2009 Vinyl chloride 3.6ug/L 11/30/2009 Vinyl chloride 2.3ug/L 12/14/2009 Vinyl chloride 1.4ug/L 4042 W Vermont St-KitchenSink 6/11/2009 Vinyl chloride 2.1ug/L 6/25/2009 Vinyl chloride 1.5ug/L 7/9/2009 Vinyl chloride 1.7ug/L 7/9/2009 Vinyl chloride 1.5ug/L 7/27/2009 Vinyl chloride 0.77ug/L 8/12/2009 Vinyl chloride 1.2ug/L 8/27/2009 Vinyl chloride 1.8ug/L 9/3/2009 Vinyl chloride 0.73ug/L 9/10/2009 Vinyl chloride 0.85ug/L 9/17/2009 Vinyl chloride 0.59ug/L 11/30/2009 Vinyl chloride ND 12/29/2009 Vinyl chloride ND

1/13/2010 Vinyl chloride 2.6ug/L 1/13/2010 Vinyl chloride 0.53ug/L

VERMONT ST

This map is intended to serve as an aid in graphic representation only. This information is not warranted for accuracy or other purposes.

Mapped By: Shane Moore, Office of Land Quality Date: 04/13/2015

Sources: Non Orthophotography Data - Obtained from the State of Indiana Geographical 

# μ West Vermont Drinking Water Contamination Marion County Health Dept. Sampling Event Speedway, Marion County, Indiana

Marion Hendricks Boone Hamilton

Hancock 

### Marion County

Sampling Locations
0 50 100 25 Meters L MICHIGAN ST

State of Indiana 2011

Information Office Library Samplling Data is from IDEM SampDB Orthophotography - Obtained from Indiana Map Framework Data (www.indianamap.org) Map Projection: UTM Zone 16 N Map Datum: NAD83 Johnson Morgan Shelby 

### 0 170 340 85 Feet



## 13

## 14 

## REFERENCES

No. Description of the Reference

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16

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## 15 19. Mundell Consulting Professionals, Remediation Work Plan, September 18, 2013. 1510 pages.

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- 1 st 

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33. IDEM, Voluntary Remediation Agreement, April 25, 2007. 67 pages.

## 16 34. IDEM, Letter from Andrea Robertson, Project manager, Volu ntary Remediation Program to Bob Lewis, Genuine Parts Company, Subject: Voluntary Remediation Agreement, Former Allison Engine Plant 10, Ma y 11, 200 0 . 1 9 pages.

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4 1 Reference Number Reserved

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, Subject: West Vermont Residential Field Sheets

, February 4 , 201 5

. 3 pages

.

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, (continuation of Ref. 25), July 23, 2007 , 862 pages. This reference goes with Ref. 25.

47. Weston Solutions, Inc.

, ALS Laboratory Group, West Vermont Street site , Speedway, Indiana, Data Validation Report, A pril 19, 2010. 15 pages

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48. Favero Geoscienc es, Letter with Attachments from David M. Favero, Project Manager to Don Heller, U.S. EPA, Region 5, Waste Management Division, Subject: Fourth Quarter 2010 Progress Report , RCRA Corrective Action, USEPA ID Nos. IND006412248 and IND0008062828, January 14, 20 11

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- Critical Removal Action at the West Vermont

## 17 Drinking Water Contamination Site, Speedway, Marion County, Indiana (Site ID #B5UJ), Septe m ber 26, 2011, 28 pages

.

50. Weston Solutions, Inc., Pace A nalytical Services, Inc. , West Vermont Hydrogeologic Investigation

, Speedway, Indiana, Data Validation Report, November 1 8 , 201 1

. 290 pages

.

51. U. S. EPA, OSC: Shelly Lam, W. Vermont Hydrological Investigation, Field Log Notes, November 9, 2011. 53 pages.

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- Scene Coordinator, U.S. EPA, Region 5 to Mark Jaworski, January 8, 2015. 3 pages.

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.

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, Subject: Copy of West Vermont Revised Source Sample List

, April 10, 2015, 47 pages.

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60. Tetra Tech, Ground Water Sampling Collection Using Low

- Flow Sampling Methodology

, July 2009 . 2
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.

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.

64. University of Minnesota, Lynda Ellis and Sean Anderson, Tetrachloroethene P athway M ap (anaerobic), 2011. 5 pages.

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.

66. Weston Solutions, Inc., Pace Analytical Services, Inc., West Vermont Site, Speedway, Indiana, Data Validation Report, January 16, 2014 . 41 pages

.

67. IDEM, Email with Attachments from Kristy Mcintire , Environmental Chemist to Mark Jaworski, Subject: Key Findings Table for Background for February Results, April 21, 2015 . 6 pages.

## 18 68. Citizens Energy Group, Email from Ann McIver to Mark Jaworski, Riverside and White River Population, August 28, 2014. 3 pages.

69. Weston Solutions, Inc., Pace Analytical Services, Inc., West Vermont Site, Speedway, Indiana, Data Validation Report, February 4, 2014. 56 pages.

70. Weston Solutions, Inc., Pace Analytical Services, Inc., West Vermont Site, Speedway, Indiana, Data Validation Report, February 4 , 2014. 26 pages

.

71. Weston Solutions, Inc., Pace Analytical Services, Inc., West Vermont Site, Speedway, Indiana, Data Valid ation Report, February 27, 2014. 69 pages.

72. Pace Analytical, West Vermont Street Pace Project No. 5095028, Analytical Results, March 28, 2014. 84
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73. Pace Analytical, Analytical Results, April 24, 2014. 30 pages.

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75. ENVIRON International Corporation, Remedial Progress Report, F ormer Allison Plant 10, 700 North Olin Avenue, Indianapolis, Indiana, August 2014, 300 pages.

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. 77. Tetra Tech, Field Log Book, November 26, 2014. 6 pages.

78. Pace Analytical, Analytical Results, April 2 9 , 2014. 25 pages

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80. Weston Solutions, Inc., Title Search Report for West Vermont Water Contamination Site, Michigan Plaza Property , June 16, 2011. 12 pa ges .

81. U.S. EPA, Using Q ualified Data to Document an Observed Release and Observed Contamination, November 1996, 18 pages.

82. Reference Number Reserved

83. Veolia Water Indianapolis, LLC., Phase II Indianapolis W ater Wellhead Protection Plan, March 2007. 320 pages.

84. US. EPA, Email from Shelly Lam , Federal On-Scene Coordinator to Nuria Muniz, Mark Jaworski, Carmen Anderson, Subject: West Vermont Drinking Water Site - Weston Boring/Monitoring well Logs, December 3, 2014. 21 pages.

85. Tetra Tech, Final Sampling and Analysis Plan, October 6, 2014. 100 pages.

## 19 86 IDEM, Email from Carmen Anderson , Senior Environmental Manager, Remediation Services Branch to Mark Jaworski, Senior Environmental Manager, Site Investigation Program, Subject: Michigan Plaza, May 1, 2015. 1 page.

87. U.S. EPA, Well Log Book, November 18, 2014. Excerpt. 2 pages

.

88. Marion County Health Department, Email fro m Adam Rickert to Mark Jaworski, Subject: D rinking Water Wells Along Fleming and Vine Streets, January 8, 2015. 14 pages

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89. U.S. EPA, Region 5, Sample Data Group (SDG) E5AS4, Level 3 Data Validation, December 15, 2014. 251 pages.

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91. U.S. EPA, Region 5, Sample Data Group (SDG) E5AT4, Level 3 Data Validation, December 30 , 2014. 65 pages

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92. U.S. EPA, Region 5, Sample Data Group (SDG) E5AW8, Level 3 Data Validation, January 6, 2014. 221
pages.

93. Tetra Tech, Ground Water Sampling Collection Using Low

- Flow Sampling Methodology , October 30, 2014. 25 pages.

94. U.S. EPA, Region 5, Sample Data Group (SDG) E5AZ2, Level 3 Data Validation, December 19, 2014. 2 06 pages.

95. Pace Analytical, Analytical R esults, April 28, 2014, 26 pages.

96. Keramida, Remedial Assessment and Soil Excavation Report, Former General Motors Corporation, Allison Gas Turbine Division, Plant 10, Volume 2 of 2, July 23, 2007. 281 pages

.

97. Keramida, Remedial Assessment and Soil Excavation Report, Former General Motors Corporation, Allison Gas Turbine Division, Plant 10, Volume 1 of 2, July 23, 2007. 996 pages

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98. Mundell Consulting Professionals, Quarterly Monitoring Progress Report, 4 th 

## Quarter, 2013, January 31, 2014. 5 93 pages.

99. Mundell & Associates, Inc., Phase II Environmental Site Assessment, Michigan Meadows Apartments, May 5, 2005. 236 pages.

100. Keramida Environmental, Inc., Final remediation Work Plan, F ormer Ge ne ral Motors C orporation, Allison Gas turbine Division, Plant 10, Volume 1 , A ugust 16, 2004. 2909 pages.

101. Quality Environmental Professionals, Inc., Monitoring Well Logs, November 18, 2014. 8 pages.

102. U.S. EPA, Residential Well Information, October 17, 2014

. 2 pages

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103. U.S. EPA. Email from Shelly Lam , LPG, Federal On

- Scene Coordinator to Carmen Anderson, Mark Jaworski , Nuria Muniz, Subject: West Vermont, February 2 6 , 2015. 2 pages.

104. Microseeps, 2010 Laboratory Results, July 21, 2010. 46 pages.

## 20 105. Pace Analytical, West Vermont Street, Pace Project No. 5055016 , December 24, 2011. 29 pages.

106. Keramida, Remedial Assessment a nd Soil Excavation Report, F ormer General Motors Corporation, Allison Gas Turbine Division, Plant 10 ( C ontinuation of Referen ce 25 ), July 23, 2007 . 563 pages.

107. Indiana Department of Environmental Management, Office Memorandum from Sarah Finley, Geologist, Geological Services Section to Mark Jaworski, Federal Programs

, Subject: Preliminary Assessment, June 19, 2015 . 4 pages

.

108. U.S. EPA, Email from Donald Heller to M ark Jaworski, Subject: Allison Transmission Well Logs, April 29, 2015. 4 pages.

109. Indiana Department of Environmental Management, Email from Shelly Lam , Federal On

- Scene Coordinator, U.S. EPA

– Regi on 5 to Nuria Muniz, Mark Jaworski, Subject: Cossell Vermont Neighborhood Wells, March 4, 2015. 3 pages.

110. Indiana Department of Environmental Management, Affidavit of mark Jaworski, April 28, 2015. 1 page.

111. U.S. EPA, Email from Don Heller to Mark Jaworski

, Subject: Allison Transmission W ell Logs, MW

1003

- S3 and M W

- 1105

- S3

- 4, April 29, 2015. 4 pages.

112

. Fluor Daniel GTI, Inc., Draft

- Feasibility Study Report, General Motors

- Allison G as T urbine Plant 10, June 3, 1997. 268 pages.

113. U.S. EPA, Sample Data Group (SDG) E5BH3 , Level 3 Data Validation, March 6, 2015 . 88 pages

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114. Weston Solutions, Monitoring Well Sampling Logs, November 19, 2013. 167 pages

115. Indiana Department of Natural Resources, Significant Water Withdrawal Facility Data

- Southeast Quadrant, August 21, 2014. 26 pages.

116. Indiana Department of Natural Resources, Record o f Water Well, Various Dates. 6 2 pages

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117. Indiana Department of E nvironmental Management, Affidavit of Mark Jaworski, June 2, 2015. 1 page.

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119. Environ International Corporation, Remedial Progress Report, August 2014. 70 pages.

120. Indiana Geological Survey, The Hydrogeologic Framework of Marion County, Indiana, 2000. 15 pages.

121. Mundell Consulting Professionals, Remediation Work Plan, September 18, 2013. 54 pages.

122. Mundell Consulting Professionals, Qu arterly Monitoring Progress Report, 2 nd 

## Quarter, 2014 , July 31, 2014. 12 2 pages.

123. HNTB, Phase 1 Wellhead Protection Plan, March 2001, 41 pages.

124. City of Indianapolis, General Map Viewer, Historic Aerial Photographs, 1941, 1956, 1962, 1972, 2014, www.maps.indy.gov/MapIndy. 6 pages.

## 21 125. U. S. Department of Agriculture, Natural Resources Conservation Service, Soil Survey of Marion County, Indiana , September, 1978. 7 pages.

126. Reference Number Reserved.

127. Indiana Department of Natural Resources, Geology for Environmental Planning in Marion County, Indiana, 1980. 4 pages.

128. Black & Veatch, Boring Logs, Various Dates, 2010. 26 pages.

129. Wittman Hydro Planning Associates, Inc. And IWC Resources, Inc. WHPA, Riverside And Fall Creek W ell Fields, Capture Zone Delineation, March, 2000. 273 pages.

130. U. S. Geological Survey, Hydrogeologic Atlas of Aquifers In Indiana, 1992, 22 pages.

131. Weston Solutions, Boring Well Logs, November, 2011. 5 pages

132. Weston Solutions , Well Construc tion Form, February, 2014, 4 pages.

133. Keramida Environmental, Inc. Remediation Work Plan, Former General Motors Corporation, Allison Gas Turbine Division, Plant 10, volume 2, October 30, 2002. 613 pages.

134 Indiana Department of Environmental Manage ment, Drinking Water Branch, Water System Details, June 18, 2015. 4 pages.

135. Indiana Department of Environmental Management, Drinking Water Branch, Water System Details, June 18, 2015. 4 pages.

136. Citizens Energy Group, Email from Ann McIver to Mark Jaworski, June 24, 2015. 4 pages.

137. Citizens Energy Group, Email from Ann McIver to Mark Jaworski, June 22, 2015. 1 page.

138. Indiana Department of Environmental Management, Riverside and White River Municipal Well Calculations, June 23, 2015. 1 pa ge.

139. Indiana Department of Environmental Management, Speedway Municipal Well Calculations, June 23, 2015. 1 page.

140. Citizens Energy Group, Email from Ann McIver to Mark Jaworski, Requested Well Information, June 3, 2015. 13 pages.

141. Speedway Water Works, Email from Steve Hurst to Mark Jaworski, Well and SWP Capacities, June 30, 2015. 2 pages.

142. Speedway Indiana Waterworks, Email from Mary Armacost to Mark Jaworski, Well 8R, June 30, 2015. 2
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pages

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144. U.S. Census Bureau. Census Data for Marion County, Indiana. Accessed 7/29/2015. http://quickfacts.census.gov/qfd/states/18/18097.html . 2 pages.

## 22 145. Citizens Energy Group, Email from Ann McIver to Mark Jaworski, RE: Inactive Wells, June 11, 2015. 1
page.

146. Speedway Indiana Waterworks, Email from Mary Armacost to Mark Jaworski , RE : Active/Inactive Wells. June 11, 2015. 1 page.

147. Speedway Indiana Waterworks, Email from Mary Armacost to Mark Jaworski , RE: Well 8R. August 3, 2015. 1 page.

148. U.S. EPA. SW

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. 8260B Volatile Organic Compounds by Gas Chromatography/Mass Spectrometry (GC/MS) December, 1996. 86
pages. Available at: http://www.epa.gov/osw/hazard/testmethods/sw846/pdfs/8260b.pdf

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150. Pace Analytical Laboratories, Inc. Chris Boyle. Definition of Reporting Limits. August 12, 2015. 1 page.

## 23 

## West Vermont D rinking Water Contamination

S UMMARY

The West Vermont Drinking Water Contamination consists of overlapping contaminated ground water releases from sources on two properties in a commercial/residential area of Indianapolis, Indiana. See Figure 1

- 1 for a Location of the area within the State of Indiana. The sources are located at the Genuine Parts facility and at Michigan Plaza. Michigan Plaza is located approximately 1100 feet south of the Genuine Parts property as shown on Figure 1

- 3. Initially identified as potential sources (Figure 1

- 3), vol atile organic compound (VOC) contamination has been confirmed in both subsurface soils and ground water monitoring wells at the Genuine Parts and Michigan Plaza facilities (Section 2.2 and Section 3.1.1 of this HRS Documentation Record). Based on 2014 samp ling, Level I concentrations of vinyl chloride also are documented in the ground water within two residential wells downgradient of the sources and within the city of Indianapolis ( Refs. 24, pp. 3, 6, 8, 10, 13, 15, 17, 21, 23, 25, 27, 29, 31; 25, pp. 8, 1 0, 17, 20, 23

- 26; 26, pp., 8, 18, 21, 24, 27, 33; 27, pp. 3, 15, 18 ). The two impacted residential wells lie within a neighborhood where 21 additional residences obtain drinking water from their own private wells (Figure 1

- 3). The private wells are the pri mary source of drinking water for the residents. Although scored in this HRS Documentation Record as a single site listing, both Genuine Parts and Michigan Plaza sources score separately (see the scoresheets in Attachments 1 and 2 to this HRS Documentation Record).

The West Vermont Drinking Water Contamination site lies between three municipal well fields (Figure 1

- 5 ). The Riverside Municipal Well Field is located approximately between two (2) and three (3) miles to the east

- northeast, the White River Municipal Well Field is located between three (3) and four (4) miles to the northeast, and the Speedway Municipal Well Field is located between one (1) and three (3) miles to the northwest (Figure 1

- 5).

The commingled ground water plume is depicted aerially by ground water sample locations with detections of trichloroethylene (TCE), cis

- 1,2

- DCE, trans

- 1, 2 dichloroethylene (trans

- 1,2

- DCE), 1,1 dichloroethane (1,1

- DCA), and vinyl chloride (VC) exceeding non

- detect background concentrations ( Section 3.1.1, Contaminated Ground Water Samples, Tables 5 and 6 of this HRS documentation record ). C oncentrations of VC have been det ected in the residential wells . The depicted plume is bounded to the north by a city park, Little Eagle Creek to the east, to the south by West Vermont Street, and to the west by Tomlinson Street (F igure 1

- 2).

The depicted plume encompasses approximately 2 0

. 2 acres (Figure 1

- 2 of this HRS documentation record; Sections 3.0.1 and 3.1.1 of this HRS documentation record). The area of the ground water plume is based on available samples that meet the criteria for an observed release (Section 3.1.1 of this HRS documentation record).

## 24 HISTORY



## In 2009 and 2010 , the Marion County Public Health Department (MCPHD) documented

, via numerous sampling events, the presence of vinyl chloride at three residences along West Vermont Street and Cossell Road. Concentrations of vinyl chloride were found to be as high as 62.7 micrograms per liter (μg/L) in the ground water in one of the three residential wells (Ref s. 14, pp. 8, 11, 13; 24, pp. 3, 5

- 70; 40, pp. 413, 414, 416, 452, 535, 559, 646 ; Figure 1

- 10 of thi s HRS Documentation Record). Including the three homes with vinyl chloride in the private wells, there are 23 homes in the Vermont and Cossell Road neighborhood that rely on private water wells as their only source of water (Ref. 109, p. 1, 3; Figure 1

- 3).

On October 8, 2009, IDEM formally requested assistance from U.S. EPA to address the contamination in the residential wells (Ref. 31, p. 1, 2) . In November 2009 and February 2010, the U.S. EPA installed temporary water treatment systems in the three re sidences to mitigate vinyl chloride in the drinking water (Ref. 38, p. 12)

. In March 2010, U.S. EPA conducted indoor air sampling at three of the residences and detected concentrations of PCE and other degradation products ( Ref. 47, p. 7

- 11, 14

- 15 ). In Ju ly 2010, EPA’s contractor conducted additional residential ground water sampling ( Table 7) of this HRS Documentation Record ; Figure 1

- 6 of this HRS Documentation Record). Concentrations of PCE, Cis 1, 2

- DCE, and vinyl chloride were detected in six (6) residential ground water samples ( Table 7 of this HRS Documentation Record; Figure 1

- 6 of this HRS Documentation Record ). On Se ptember 26, 2011, EPA approved an Action Memorandum to expend up to $237,000 to conduct time

- critical removal activities that included a hydrogeologic investigation to find the source of contamination in the residential wells (Refs. 32, p. 1; 49, p.1; 53, p. 6)

. On January 30, 2013, EPA completed a Technical Memorandum Analytical and Hydrogeological Evaluation (Technical Memorandum) for the West Vermont Drinking Water Contamination area (Ref. 38, p. 1) . This memorandum documented the findings and activiti es conducted by the U.S. EPA and Superfund Technical Assessment and Response Team (START) in November and December 2011 during an analytical and hydrogeologic investigation (Ref. 38, p. 9)

. This Technical Memorandum also documents and incorporates specific historical information and analytical data for the purpose of determining the potential source or sources of contamination in West Vermont Street residential drinking water wells (Ref.38, p. 9).

START installed 13 monitoring wells in the West Vermont a rea in November 2011. The wells were surveyed using a benchmark established during a previous survey (Ref. 38, p. 25)

. On December 6 and 7, 2011, 152 monitoring wells , located at and near Michigan Plaza and Genuine Parts, as well as another nearby facility, Allison Transmission, were gauged and 66 monitoring wells were sampled (Ref. 38, p. 25)

. Cis

- 1,2

- DCE, Trans

- 1,2 DCE, TCE, PCE

, and/or Vinyl chloride were detected in several of the monitoring wells samples (Refs. 38, pp. 48

- 50, 78, 79, 420

- 429, 445; 50, pp.4

- 236; 51, pp. 9

- 11, 24

- 26, 41

- 51 ).

The Technical Memorandum concluded that the study area for the analytical and hydrogeological evaluation contains several potential sources of vinyl chloride contamination in the residential wells, including Allison Transmission, Genuine Parts, and Michigan Plaza. Each potential source has had releases of tetrachloroethylene (PCE) or trichloroethylene (TCE), with vinyl chloride as a natural breakdown product (Ref. 38, p. 36)

.

## 25 

## The Technical Memorandum stated that m onitoring wells along West Michigan Street were installed to monitor contaminant migration from Allison Transmission. These monitoring wells have showed no

- detect results for PCE, TCE, DCE, and VC (Ref. 38, p. 36). Howe ver, the U.S. EPA determined that at least two monitoring wells on West Michigan Street directly north of the residential area are screened in zones deeper than contamination at Allison Transmission and deeper than the residential wells (Ref. 38, p. 36)

. During the investigation, the U.S. EPA installed two additional nested monitoring well sets along West Michigan Street to fill this data gap (Ref. 38, p. 36). The data collected confirm that PCE, TCE, and vinyl chloride are not present between Allison Tran smission and the West Vermont Street residential area (Ref. 38, p. 36). The report stated that the contamination at the Allison Transmission plant is restricted to the Allison Transmission property, and Allison Transmission is not a contributor of contami nation to the residential area (Ref. 38, p. 36). The Technical Memorandum stated that the U.S. EPA determined that both Genuine Parts and Michigan Plaza are actual or potential contributors to VC contamination in the residential area (Ref. 38, p. 37).

The conceptual site model presented in the 2013 Remediation Work Plan prepared on behalf of Michigan Plaza projected similar findings as those in the Technical Memorandum regarding Michigan Plaza source and ground water VOC contamination and Genuine Parts source and ground water VOC contamination. The Remediation Work Plan further concluded at least limited commingling of the ground water releases (Ref. 19, pp. 15, 52).

The U.S. EPA and General Motors Corporation (GM) have entered into a performance

based Resource Conservation and Recovery Act (RCRA) Corrective Action agreement (Agreement) with the effective date of April 27, 2005. Pursuant to the Agreement, GM has worked in cooperation with the U.S. EPA to investigate, and as necessary, stabilize and remed iate releases of hazardous wastes or hazardous constituents at or from Allison Transmission ( Ref. 35, p. 38).

From September 2013 through March 2014, U.S. EPA continued sampling of monitoring wells. Concentrations of vinyl chloride and cis 1, 2

- Dichloro ethylene continued to be detected in the monitoring wells ( Table 8 of this HRS Documentation Record; Figure 1

- 7 of this HRS Documentation Record).

According to an email outline by the Marion County Health Department, there are 20 residences in the immediate area that obtain drinking water from their private wells ( Ref. 109, pp. 1, 3 ; Figure 1

- 3 of this HRS Documentation Record ).

A Preliminary Assessment (PA) was conducted by IDEM for the West Vermont Drinking Water Contamination (Ref. 53, p.1) . The PA was finalized by U.S. EPA on March 11, 2015 (Ref. 53, p. 2) . The PA documented the contaminated ground water at the three residenti al wells Ref. 53, p. 6) . The PA also discussed the environmental activities that were conducted by the U.S

. EPA, Allison Transmission, Genuine Parts, and Michigan Plaza. The environmental activities included the installation of monitoring wells, the collec tion of ground water samples at the above mentioned facilities and the residential wells, and other environmental activities (Ref. 53, pp. 6

- 13)

.

## 26 

## In October and November 2014, U.S. EPA collected 45 ground water samples. The ground water samples were obt ained from selected private residential wells located along West Vermont and Cossell Avenue from nearby established monitoring wells (Refs. 76, pp. 8, 9, 12, 13, 14, 15; 89, p.1; 90, p.1; 91, p.1; 92, p. 1, 94, p. 1 ; Table 5 and Table 6 of this HRS Documen tation Record). The ground water samples were analyzed for VOCs (Refs. 89, p. 2 ; 90, p. 2 ; 91, p. 2 ; 92, p. 2 , 94, p. 1) In addition, two background monitoring wells (WVS

- 10 and WVS

- 11) were installed north of Genuine Parts property (Ref.84, pp. 18

- 21; 77, pp. 1

- 6; 87, p. 1, 2; Figure 1

- 2 of this HRS Documentation Record). Laboratory a nalysis of the ground water from the residential private wells and from monitoring wells revealed detections of vinyl chloride, trichloroethylene, tet rachloroethylene, cis, 1, 2

- dichloroethene and trans 1, 2 dichloroethene (Table 5 and Table 6 of this HRS Documentation Record). No contaminants of concern were detected in any of the background monitoring wells (Figure 1

- 2 ; Table 4 of this HRS Documentat ion Record).

## 27 

## 2.2 SOURCE CHARACTERIZATION

2.2.1 Source Identification

Number of Source: 1

Name and description of the source : Leaky Sewer Line

– Michigan Plaza

Source Type : Contaminated Soil

Source 1 is associated with historic solvent discharg es from a dry cleaners, Accent Cleaners, to a leaky sewer line (Ref.19, pp. 14, 15, 70, 129, 149, 150). Analytical results from subsurface soil samples obtained from the leaky sewer areas indicate the presence of trichloroethylene (TCE), cis 1,2,

- dichloroe theyene (CIS 1,2 DCE), and tetrachloroethylene (PCE) (Figure 1

- 4; Table 1 of this HRS Documentation Record).

The construction of a new sewer line connection to the existing manhole at the bend of a sewer line which travels from the south to the north sid e of Michigan Street was conducted in October 2007. During the excavation activities, PCE and TCE were detected in a soil sample obtained at approximately 4 feet in the excavation area. Higher concentrations of PCE and TCE were also detected at approximate ly 9 feet obtained from the same exact area (Ref. 40, pp. 52, 53)

.
Location of Source The source area associated with the leaky sewer line is located on the south sector of Michigan Plaza, northern and southern areas of Michigan Street located north of Michigan Plaza, and along the south and southeastern property of Maple Creek Village Apartments (Ref. 19, pp. 15, 70, 129, 132, 142, 143, 145

- 151).

2.2.2 Hazardous Substances Associated with Source No. 1

Table 1 below depicts the date, sample identification, hazard substance detected, hazardous substance concentration, and other associated information that were obtained from the Michigan Plaza source area. Refer to Figure 1

- 4 of this HRS Documentation Record for an aerial view of the Michigan Plaza Source area. Subsurface soils in the area consist largely of loam (silty, sandy and/or sandy clay loams) (Refs. 19, pp. 33, 34; 25, pp. 36

- 77). Soil and ground water samples were analyzed in accordance with U.S. EPA Method 8260 ( Ref s

. 26, p. 153; 5 7 , p. 4; 148 ).

## 28 

## Table 1 Source No. 1 Soil Sample Table Michigan Plaza (Soils Obtained Greater Than Two Feet Above The Water Table)

Lab ID Client Sample ID # Date Collected Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) RL Units Reference

09

- 0105 SB

- 3 (2

- 3) 2/3/2009 SB

- 3 2

- 3 Feet PCE 71 J+ 1 (7

. 1) * 5.0 μg/kg 26, pp. 128, 153; 57, pp. 6, 13, 25; 81,

pp. 8,

507931001 SEWER EXC. (4’) 10/1/2007 Sewer Excavation 4 Feet PCE 243 5.6 μg/kg 27, pp. 515, 516,

526; cis

- 1,2

-

DCE 11.7 5.6 μg/kg

TCE 57.7 5.6 μg/kg

5023501014 SB

- 15 (4

- 6 ’ ) 2/17/2009 SB

- 15 4

- 6 Feet PCE 110 J

1 (110) 5.4 μg/kg 26, pp. 387, 408; 57, pp. 6, 13

, 1 9 ; 81, p. 8

5023501020 SB

- 17 (4

- 6 ’ ) 2/17/2009 SB

- 17 4

- 6 Feet PCE 77.2 5.8 μg/kg 26, pp. 393, 408

5096084002 MMW

- P

- 22

- LA (4

- 6) 4/10/2014 MMW

- P

22

- LA 4

- 6 Feet cis

- 1,2

- DCE 234 J

2 (234) (DL) 203 μg/kg 57, pp. 9, 13, 37, 38;

81, p. 8; 95, pp. 3, 7, 8, 24 PCE 62.6 J+ 2 (6.26) 4.0 μg/kg

TCE 46.1 J+ 2 (21.84) 4.0 μg/kg

5023333001 SB

- 11 (5

- 6 ’ ) 2/13/2009 SB

- 11 5

- 6 Feet PCE 3,890 (DL) 261 μg/kg 26, pp. 291, 293, 339 TCE 25.3 5.2 μg/kg

5023333002 SB

- 11 (8

- 9 ’ ) 2/13/2009 SB

- 11 8

- 9 Feet PCE 4,320 (DL) 260 μg/kg 26, pp. 291, 295, 339 TCE 34.0 5.2 μg/kg

507931002 SEWER EXC. (9’) 10/1/2007 Sewer Excavation 9 Feet PCE 2,300 (DL) 273 μg/kg 27, pp. 517, 518, 526 cis

- 1,2

-

DCE 15.4 5.5 μg/kg

TCE 55.4 5.5 μg/kg

5023501015 SB

- 15 (8

- 10 ’ ) 2/17/2009 SB

- 15 8

- 10 Feet PCE 130 J+ 2 (13.0) 5.2 μg/kg 26, pp. 388, 408; 57, pp. 6, 13,20;81,

p. 8,

5088407003 MGW

- 9D (8

- 10) 10/14/2013 MGW

- 9D 8

- 10 Feet PCE 11,100 (DL) 888 μg/kg 98, pp. 390, 397, 420

09

- 0094 SB

- 4 (10

- 11 ’ ) 2/3/2009 SB

- 4 10

- 11 Feet PCE 118 J+ 1 ( 11.8 ) * 5.0 μg/kg 26, pp. 106, 152; 57, pp. 6, 14, 26; 81,

pp. 8, 11

## 29 5023333005 SB

- 13 (10

- 11 ’ ) 2/13/2009 SB

- 13 10

- 11 Feet PCE 1,640 (DL) 136 μg/kg 26, pp. 291, 300, 301, 339 cis

- 1,2

-

DCE 45.8 5.4 μg/kg

TCE 55.7 5.4 μg/kg

507714 7001 MMW

- 10S

- A (10

- 12) 3/6/2013 MMW

10S

- A 10

- 12 Feet PCE 1,640 (DL) 484 μg/kg 28, pp. 289, 292

5096109001 MMW

- P

- 22

- LA (10

- 12) 4/11/2014 MMW

- P

22

- LA 10

- 12 Feet cis

- 1,2

- DCE 136 5.3 μg/kg 78, pp. 3, 5, 23 PCE 724 (DL) 533 μg/kg

TCE 42.4 5.3 μg/kg

09

- 0092 SB

- 3 (11

- 12) 2/3/2009 SB

- 3 11

- 12 Feet PCE 6.09 (DL) 1 mg/kg 26, pp. 102, 152

5095863001 MMW

- 21

- LA (11

- 12) 4/7/2014 MMW

- 21

- LA 11

- 12 Feet cis

- 1,2

- DCE 6.1 4.8 μg/kg 73, pp. 4, 5, 6, 28 PCE 34,700 (DL) 2,050 μg/kg

TCE 18.3 4.8 μg/kg

5077222004 MMW

- P

- 02

- A (12

- 14) 3/7/2013 MMW

- P

02

- A 12

- 14 Feet PCE 118 4.9 μg/kg 28, pp. 328, 336

5095863002 MMW

- 21

- LA (12

- 14) 4/7/2014 MMW

- 21

- LA 12

- 14 Feet cis

- 1,2

- DCE 1,310 (DL) 211 μg/kg 73, pp. 4, 7, 8, 28 PCE 49,000 (DL) 2,110 μg/kg

TCE 1,390 (DL) 211 μg/kg

Notes:

# Number DCE Dichloroethene DL Concentration exceeded the instrument's calibration range. Samples were reanalyzed using a dilution factor and the results a re reported from the diluted analysis. Dilution in and of itself does not indicate any associated data quality issue ID Identification J

1 Laboratory control sample y iel ded a low recovery; the result is estimated with a low bias. Results for release samples require no adjustment according to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996 (Ref. 81, pg. 5)

. J

2 Reanalysis was outside the holding time; the result is estimated with a low bias. Results for release samples require no adj ustment according to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996 (Ref. 81, pg. 5 ). J+ 1 Surrogate displayed recoveries above the quality control limit; the result is estimated with a high bias. Results for releas e samples were adjusted according to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996 (Ref. 81,pg. 5)

. J+ 2 Excessive surrogate recovery; the result is estimated with a high bias. Results for release samples were adjusted according to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996 (Ref. 81,pg. 5 ). Adjusted value is shown in parentheses. μg/kg Micrograms per kilogram mg/kg Milligrams per kilogram PCE Tetrachloroethene RL Reporting limit ; The reporting limit presented is equivalent to the sample quantitation limit as defined by HRS Section 1.1, Definitions (Ref s. 1, p p . 59, 60; 150) TCE Trichloroethene VC Vinyl chloride

## 30 

## While not required for HRS scoring purposes, background samples are presented below to show the relative increase of contaminant levels in source samples over background levels. Table 2 below depicts the background samples that were collected from borings located between Source 1 and Source 2 . The table depicts the date, sample identification, the lab analysis results of the background samples, and other associated information. No detection s of any volatile organic compounds were detected in the background soil samples. Refer to Figure 1

- 4 of this HRS Documentation Record for an aerial location of the background soil samples.

T able 2 Background Soil Sample Table (Soils Obtained Greater Than Two Feet Above The Water Table)

Lab ID Consultant Sample # Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) RL Units Reference

503733172 MMW

- 6D 8/23/2004 MMW

- 6D 11

- 1 2 Feet 1,1

- DCE 5.0 U 5.0 μg/kg

99, pp. 36, 121, 122, 134 cis

- 1 ,2

-

DCE 5.0 U 5.0 μg/kg

trans

- 1,2

-

DCE 5.0 U 5.0 μg/kg

PCE 5.0 U 5.0 μg/kg

TCE 5.0 U 5.0 μg/kg

VC 2.0 U 2.0 μg/kg

5 03744989 MMW

- 4D (9

- 10) 8/25/2004 MMW

- 4D 9

- 10 Feet 1,1

- DCE 5.0 U 5.0 μg/kg

99, pp. 36, 108, 109, 119 cis

- 1,2

-

DCE 5.0 U 5.0 μg/kg

tra ns

- 1,2

-

DCE 5.0 U 5.0 μg/kg

PCE 5.0 U 5.0 μg/kg

TCE 5.0 U 5.0 μg/kg

VC 2.0 U 2.0 μg/kg

5 03750598 MMW

- 3S (9

- 10) 8/26/2004 MMW

- 3S 9

- 10 Feet 1,1

- DCE 5.0 U 5.0 μg/kg

99, pp. 36, 95, 96, 106 cis

- 1,2

-

DCE 5.0 U 5.0 μg/kg

trans

- 1,2

-

DCE 5.0 U 5.0 μg/kg

PCE 5.0 U 5.0 μg/kg

TCE 5.0 U 5.0 μg/kg

VC 2.0 U 2.0 μg/kg

## 31 503740128 MMW

- 5D (11) 8/24/2004 MMW

- 5D 11 Feet 1,1

- DCE 5.0 U 5.0 μg/kg

99, pp. 36, 139, 140, 150 cis

- 1,2

-

DCE 5.0 U 5.0 μg/kg

trans

- 1,2

-

DCE 5.0 U 5.0 μg/kg

PCE 5.0 U 5.0 μg/kg

TCE 5.0 U 5.0 μg/kg

VC 2.0 U 2.0 μg/kg

503730343 MMW

- 2S 8/19/2004 MMW

- 2S 13 Feet 1,1

- DCE 5.0 U 5.0 μg/kg

99, pp. 36, 82, 83 cis

- 1 ,2

-

DCE 5.0 U 5.0 μg/kg

trans

- 1,2

-

DCE 5.0 U 5.0 μg/kg

PCE 5.0 U 5.0 μg/kg

TCE 5.0 U 5.0 μg/kg

VC 2.0 U 2.0 μg/kg

Notes:

# Number DCE Dichloroethene ID Identification μg/kg Micrograms per kilogram PCE Tetrachloroethene RL Reporting limit ; The reporting limit presented is equivalent to the sample quantitation limit as defined by HRS Section 1.1, Definitions (Ref s. 1, p p . 59, 60; 150) TCE Trichloroethene U Not detected at or above adjusted reporting limit VC Vinyl chloride



## The following hazardous substance s are associated with the source:

- trichloroethylene (TCE )

- tetrachloroethylene (PCE)

- cis

- 1,2

- dichloroethylene (cis

- 1,2

- DCE)

## 32 

## Location of the source with reference to a map: See Figures 1

- 2, 1

- 4, and 1

- 5 which show an aerial view of the location of S ource No. 1

.

2.2.3 Hazardous Substances Available to a Pathway

Containment Description Containment Factor Value References

Gas release to air:

The air migration pathway was not evaluated; therefore, gas containment was not evaluated Not Scored

Particulate release to air:

The air migration pathway was not evaluated; therefore, gas containment was not evaluated. Not Scored

Release to ground water:

The applicable containment factor value was determined based on existing analytical evidence of hazardous substances in ground water from private public wells and established monitoring wells. There is no liner, either engineered or natural, for the source areas at Michigan Plaza and Genuine Parts. Therefore, based on evidence of hazardous substance migration from source area and lack of a liner , the highest Ground Water Migration Pathway Containment Factor Value of 10 was assigned to Source No. 1 as specified in Table 3

- 2 of the HRS Rule

. 10 Ref s

. 1, Table 3

- 2, Section 3.1.2.1

, p. 70 ; 149, p. 1 See Section 3. 1. 1 of this HRS documentation record

Release via overland migration and/or flood:

The surface water pathway was not scored; therefore, surface water overland/flood migration component containment was not evaluated Not Scored

## 33 

## 2.4.2 Hazardous Waste Quantity

2.4.2.1 Source Hazardous Waste Quantity

2.4.2.1.1 Hazardous Constituent Quantity (Tier A)

The hazardous constituent quantity for Source No. 1 could not be adequately determined according to the HRS requirements; that is, the total mass of all Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) hazardous substances in the source and releases from the source is not known and cannot be estimated with reasonable confidence (Ref. 1, Section 2.4.2.1.1). There are insufficient historical and current data (manifests, potentially responsible parties (PRP) records, State records , permits, waste concentration data, etc.) available to adequately calculate the total or partial mass of all CERCLA hazardous substances in the source and the associated releases from the source. Therefore, there is insufficient information to evaluate th e associated releases from the source to calculate the hazardous constituent quantity for Source No. 1 with reasonable confidence. A s a r e su lt, t h e
e v a l u a t i o n o f h aza rdo u s w a s te q u a n ti t y p r o cee d s to t h e e v al u a ti o n o f T ier B

, h aza rdo u s
w a s t e s t r e a m q u a n t i t y ( R e f

. 1 , Secti o n 2.4.2.1. 1

, p p

. 6 4

, 6 5 )

. Hazardous Constituent Quantity Assigned Value: NS

2.4.2.1.2. Hazardous Wastestream Quantity (Tier B)

The hazardous wastestream quantity for Source No. 1 could not be adequately determined according to the HRS requirements; that is, the mass of the hazardous wastestreams plus the mass of any additional CERCLA pollutants and contaminants in the source and r eleases from the source is not known and cannot be estimated with reasonable confidence ( Ref. 1, Section 2.4.2.1.2). There are insufficient historical and current data ( m anifests, PRP records, State records, permits, waste concentration data, etc.) availab le to adequately calculate the total or partial mass of the wastestream plus the mass of all CERCLA pollutants and contaminants in the source and the associated releases from the source. Therefore, there is insufficient information to evaluate the associat ed releases from the source to calculate the hazardous wastestream quantity for Source No. 1 with reasonable confidence. Scoring proceeds to the evaluation of Tier C, Volume ( R e f

. 1 , Secti o n 2.4.2.1

. 2

, p

. 6 5 )

. Hazardous Wastestream Quantity Assigned Value: NS

2.4.2.1.3. Volume (Tier C)

The information available on the depth of Source No. 1 is not sufficiently specific to support a volume reasonable confidence; therefore it is not possible to assign a volume (Tier C) for Source No. 1 (Ref. 1, Section 2.4.2.1.3). Source No. 1 has been ass igned a value of 0 for the volume measure. As a result the evaluation of hazardous waste quantity proceeds to the evaluation of Tier D, area (Ref. 1, Section 2.4.2.1.3, p. 65 ). Volume Assigned Value: 0

## 34 

## 2.4.2.1.4. Area (Tier D)

The horizontal extent of Source No. 1 and the continuation of contamination between sample points have not been sufficiently determined; therefore, the source area is unknown, but greater than 0 (Ref. 1, Section 2.4.2.1.4, p. 65).

Area Assigned Value: Unknown, but > 0

2.4.2. 1.5. Source Hazardous Waste Quantity Value

Area of contaminated soil source : >0 Highest assigned value assigned from Ref. 1, Table 2

- 5: > 0 Source Hazardous Waste Quantity Value: >0 (Ref. 1, Section 2.4.2.1.5, p. 65).

## 35 

## 2.2.1 Source Identification

Number of Source : 2

Source Type : Soil Contamination

Name and Description of the Source: Historic degreasing and industrial waste burial activities

– Genuine Parts

The source area is associated with former parts degreasing operations and waste buria l activities on the west side of the Genuine Parts property (Ref s . 36, p. 36; 75, p. 8). During exploratory trenching activities, fill material consisting of soil and occasional automotive debris parts mostly consisting of round flexible discs were encoun tered near the surface (Ref. 25, p. 12). Analytical results from subsurface soil samples indicate the presence of TCE, CIS 1,2 DCE, PCE, Trans 1,2 DCE, and VC (Ref. 25, pp. 105, 106; Source Soil Sample Map from Tetra Tech, Table 2 of this HRS Documentatio n Record).

Hazardous waste was excavated between April 9, 2001 and July 6, 2001 (Ref. 21, p. 50). During this time 190 loads of waste were transported and disposed at Envi r onsafe Services of Ohio, Inc. in Oregon, Ohio resulting in a total of 4,981.51 ton s (Ref. 21, p. 50). During the removal a ction, it was observed that buried waste extended beneath the building. Soil borings placed inside the building revealed that the buried waste extended beneath the building approximately 100 feet to the east and appr oximately 75 feet north from the southwest corner of the building (Ref, 3 6, p. 36). As shown in Table 3 of this HRS Documentation Record, below, soil contamination remained at the facility following the 2001 removal action.

Location of Source:

The sourc e area is located on the western portion of Genuine Parts property (Ref s . 25, p.106; 36, pp. 36, 27 3 , 27 4 ; Figure 1

- 4 of this HRS Documentation Record ). The eastern source of Genuine Parts, as mentioned in the Attribution Section of Section 3.1.1 of this HRS Documentation Record, is not shown in Figure 1

- 4 due to insufficient data. The exact nature of historic operations and potential contaminant release mechanisms in the eastern source area are not known (Ref. 36, p. 34). See Section 3.1.1 for additional details.

2.2.2 Hazardous Substances Associated with Source No. 2

Table 3 on the following page depicts the date, sample identification, hazard substance detected, hazardous substance concentration, and other associated information that were obtained from the western source area located on the Genuine Parts property. Refer to Figure 1

- 4 of this HRS Documentation Record for an aerial view of the source area for Genuine Parts. Subsurface soils in the area consist largely of loam (silty, sandy and/or sandy clay loams) (Refs. 19, pp. 33, 34; 25, pp. 36

- 77). Soil and ground water s amples were analyzed in accordance with U

. S

. EPA Method 8260 ( Ref s

. 26, p. 153 ; 5 7 , p. 4; 148 ).

## 36 

## Table 3 Source No. 2 Soil Sample Table Genuine Parts (Soils Obtained Greater Than Two Feet Above The Water Table)

Lab ID Consultant Sample # Date Location Depth Below Ground Surface

(feet) Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) RL Units Reference

A749078 A2

- WW

- 1 (4’) 10/5/2006 A2

- WW

- 1 4 Feet cis

- 1,2

- DCE 1 ,000 J

1 ( 1,000 ) 27 μg /kg 25, p. 28 ; 57, pp. 10, 13 81, p. 8; 106, pp. 181, 190 PCE 30 J

1 ( 30 ) 27 μ g/kg

A744579 KS

- 1 8/23/2006 KS

- 1 5 Feet TCE 6.2 5.8 μ g/kg 25, p. 28; 96, pp. 3, 7

A744586 KS

- 8 8/28/2006 KS

- 8 5 Feet TCE 20 5.4 μ g/kg 25, p, 28; 96, pp. 3, 30

A744588 KS

- 10 8/28/2006 KS

- 10 5 Feet TCE 41 5.3 μ g/kg 25, p, 28; 96, pp. 3, 37

A747903 A3

- WW

- 4 9/25/2006 A3

- WW

- 4 5 Feet cis

- 1,2

- DCE 7.9 5.8 μ g/kg 25, p. 28; 97, pp. 634, 636

A747910 A3

- EW

- 1 9/27/2006 A3

- EW

- 1 5 Feet TCE 42 5.7 μ g/kg 25, p. 28; 97, pp. 634, 661

A747912 A3

- EW

- 3 9/28/2006 A3

- EW

- 3 5 Feet cis

- 1,2

- DCE 6.9 5.9 μ g/kg 25, p. 28; 97, pp. 634, 666, 667 TCE 54 5.9 μ g/kg

A747914 A3

- SW

- 1 9/28/2006 A3

- SW

- 1 5 Feet cis

- 1,2

- DCE 320 5.6 μ g/kg
25, p. 28; 97, pp. 634, 672

- 673 trans

- 1,2

-

DCE 12 5.6 μ g/kg

T CE 1,800 ( DL ) 28 μ g/kg

A749079 A2

- WW

- 2 (9’) 10/5/2006 A2

- WW

- 2 9 Feet cis

- 1,2

- DCE 130 5.3 μ g/kg 25, p. 25 ; 106, pp. 181, 194, 195 TCE 40 5.3 μ g/kg

A744580 KS

- 2 8/23/2006 KS

- 2 10 Feet cis

- 1,2

- DCE 120 5.5 μ g/kg 25, p. 28; 96, pp. 3, 9, 10 TCE 7 5.5 μ g/kg

A744582 KS

- 4 8/23/2006 KS

- 4 10 Feet cis

- 1,2

- DCE 120 5.4 μ g/kg
25, p. 28; 96, pp. 3, 15, 16 trans

- 1,2

-

DCE 8.3 5.4 μ g/kg

TCE 16 5.4 μ g/kg

## 37 A744587 KS

- 9 8/28/2006 KS

- 9 10 Feet cis

- 1,2

- DCE 910 ( DL ) 680 μ g/kg 25, p, 28; 57, pp. 10, 13, 3 2 ; 81, p.8; 96, pp. 3, 32, 33 trans

- 1,2

-

DCE 29 5.4 μ g/kg

TCE 18,000 J

2 (18) (RA) 680 μ g/kg

A744589 KS

- 11 8/28/2006 KS

- 11 10 Feet cis

- 1,2

- DCE 3,700 ( DL ) 680 μ g/kg
25, p. 28; 96, pp. 4, 39, 40 trans

- 1,2

-

DCE 82 27 μ g/kg

TCE 340 27 μ g/kg

A746417 A1/A3 East Wall

- 2 9/6/2006 A1/A3 East Wall 11 Feet 1,1

- DCE 40 5.4 μ g/kg

25, p. 28; 97, pp. 193, 198, 199 cis

- 1,2

-

DCE 2.0 ( DL) 27 μ g/kg

trans

- 1,2

-

DCE 39 5.4 μ g/kg

T CE 250 5.4 μ g/kg

VC 8.6 5.4 μ g/kg

A747151 A3

- WW

- 3 (10’) 9/15/2006 A3

- WW

- 3 10 Feet cis

- 1,2

- DCE 350 5.6 μ g/kg

25, p. 28; 97, pp. 367, 375, 376 trans

- 1,2

-

DCE 20 5.6 μ g/kg

P CE 150 5.6 μ g/kg

TCE 11,000 ( DL ) 710 μ g/kg

A74790 4 A3

- WW

- 5 9/25/2006 A3

- WW

- 5 10 Feet 1,1

- DCE 37 5.5 μ g/kg

25, p. 28; 97, pp. 634, 639, 640 cis

- 1,2

-

DCE 23,000 ( DL ) 690 μ g/kg

t rans

- 1,2

-

DCE 99 5.5 μ g/kg

TCE 9.3 5.5 μ g/kg

VC 1,300 ( DL ) 690 μ g/kg

A74790 5 A3

- WW

- 5 DUP 9/25/2006 A3

- WW

- 5 10 Feet 1,1

- DCE 43 5.6 mg/kg

25, p. 28; 97, pp. 634, 643, 644 cis

- 1,2

-

DCE 22,000 ( DL ) 700 mg/kg

trans

- 1,2

-

DCE 110 5.6 μ g/kg

TCE 12 5.6 μ g/kg

VC 1,100 ( DL ) 700 μ g/kg

A747907 A3

- NW

- 2 9/25/2006 A3

- NW

- 2 10 Feet cis

- 1,2

- DCE 75 5.4 μ g/kg
25, p. 28; 97, pp. 634, 650, 651 tra ns

- 1,2

-

DCE 5.6 5.4 μ g/kg

TCE 220 5.4 μ g/kg

A747909 A3

- NW

- 4 9/27/2006 A3

- NW

- 4 11 Feet TCE 400 5.4 μ g/kg 25, p. 28; 97, pp. 634, 658

## 38 A747913 A3

- EW

- 4 9/28/2006 A3

- EW

- 4 11 Feet 1,1

- DCE 15 5.4 μ g/kg

25, p. 28; 97, pp. 634, 669, 670 cis

- 1,2

-

DCE 7,500 ( DL ) 680 μ g/kg

trans

- 1,2

-

DCE 92 5.4 μ g/kg

TCE 14 5.4 μ g/kg

VC 8.2 5.4 μ g/kg

A747915 A3

- SW

- 2 9/28/2006 A3

- SW

- 2 11 Feet cis

- 1,2

- DCE 1,400 ( DL ) 690 μ g/kg
25, p. 28; 97, pp. 634, 677, 678 trans

- 1,2

-

DCE 33 5.5 μ g/kg

VC 35 5.5 μ g/kg

A749077 A2

- SW

- 2 (11’) 10/5/2006 A2

- SW

- 2 11 Feet 1,1

- DCE 82 5.5 μ g/kg

25, p. 28 ; 106, pp. 181, 186, 187 cis

- 1,2

-

DCE 18,000 ( DL ) 690 μ g/kg

trans

- 1,2

-

DCE 110 5.5 μ g/kg

TCE 21,000 ( DL ) 690 μ g/kg

VC 45 5.5 μ g/kg

Notes:

# Number Dichloroethene DCE
ID Identification J

1 Matrix interference led to a recovery below the quality control limit; the result is estimated with a low bias. Results for release samples require no adjustment according to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996 (Ref. 81, p. 5 ). J

2 The matrix spike/matrix spike duplicate displayed recoveries below the quality control limit; the result is estimated with a low bias. Results for release samples require no adjustment according to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Ob served Contamination, November 1996 (Ref. 81, p. 5 ).

μ g/kg Micrograms per kilogram . Concentrations were multiplied by 1,000 to convert them from milligrams per kilogram to micrograms per kilogram for ease of comparison to background levels presented in Ta ble 2.

PCE Tetrachloroethene DL Analyte was reanalyzed using Volatile Organics, Capillary Column Technique SW

- 846

- 8260B. Concentration exceeded the instrument's calibration range. Samples were reanalyzed using a dilution factor and the results are reported from the diluted analysis. Dilution in and of itself does not indicate any associated data quality issue TCE Trichloroethene VC Vinyl chloride RL Reporting Limit; The reporting limit presented is equivalent to the sample quantitation limit as defined by HRS Section 1.1, Definitions (Ref s. 1, p p. 59, 60; 150)



## While not required for HRS scoring purposes, b ackground samples are presented in Table 2 in the Source No. 1 characterization section of this HRS documentation record. These background samples were collected from borings located between Source 1 and Source 2

. and are used for comparison to Source No. 2 samples presente d in Table 3 to show the relative increase of source contaminant levels over background levels . No detection of any volatile organic compounds were detected in the background soil samples. Refer to Figure 1

- 4 of this HRS Documentation Record for an aerial location of the background soil samples.

## 39 

## The following hazardous substance s are associated with the source:

- trichloroethylene (TCE )

- 1,1

- dichloroethylene (1,1

- DCE)

- cis

- 1, 2- dichloroethylene (cis

- 1,2

- DCE)

- trans

- 1, 2

- dichloroethylene ( trans

- 1,2

- DCE )

- vinyl chloride (VC)

- tetrachloroethylene (PCE)

Location of the source with reference to a map: See Figures 1

- 2, 1

- 4, and 1

- 5 which show and aerial view of the location of S ource No. 2

.

2.2.3 Hazardous Substances Available to a Pathway

Containment Description Containment Factor Value References

Gas release to air:

The air migration pathway was not evaluated; therefore, gas containment was not evaluated N ot Scored

Particulate release to air:

The air migration pathway was not evaluated; therefore, gas containment was not evaluated. N ot Scored

Release to ground water:

The applicable containment factor value was determined based on existing analytical evidence of hazardous substances in ground water from private public wells and established monitoring wells. There is no liner, either engineered or natural, for the source areas at Michigan Plaza and Genuine Parts. Therefore, based on evidence of hazardous substance migration from source area and lack of a liner , the highest Ground Water Migration Pathway Containment Factor Value of 10 was assigned to Source No. 1 as speci fied in Table 3

- 2 of the HRS Rule 10 Re f s . 1, Table 3

- 2, Section 3.1.2.1

, p.70 ; 149, p. 1; See Section 3. 1. 1 of this HRS documentation record

## 40 

## Containment Description Containment Factor Value References

Release via overland migration and/or flood:

The surface water pathway was not scored; therefore, surface water overland/flood migration component containment was not evaluated N ot Scored

2.4.2 Hazardous Waste Quantity

2.4.2.1 Source Hazardous Waste Quantity

2.4.2.1.1 Hazardous Constituent Quantity (Tier A)

The hazardous constituent quantity for Source No. 2 could not be adequately determined according to the HRS requirements; that is, the total mass of all Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) hazardous substances in the source and releases from the source is not known and cannot be estimated with reasonable confidence (Ref. 1, Section 2.4.2.1.1). There are insufficient historical and current data (manifests, potentially responsible parties (PRP) records, State records, permits, waste concentration data, etc.) available to adequately calculate the total or partial mass of all CERCLA hazardous substances in the source and the associated releases from the source. Therefore, there is insufficient information to evaluate the associated releases from the source to calculate the hazardous constituent quantity for Source No. 2 with reasonable confidence. As a resu lt, the evaluatio n of h aza rdo us was te quan ti ty pro cee ds to t he ev al ua ti on of T ier B, h aza rdo us wastestream quantity (Ref. 1 , Secti on 2.4.2.1. 1, pp. 64, 65).

Hazardous Constituent Quantity Assigned Value: NS

2.4.2.1.2. Hazardous Wastestream Quantity (Tier B)

The hazardous wastestream quantity for Source No. 2 could not be adequately determined according to the HRS requirements; that is, the mass of the hazardous wastestreams plus the mass of any additional CERCLA pollutants and contaminants in the source and releases from the source is not known and cannot be estimated with reasonable confidence ( Ref. 1, Section 2.4.2.1.2 , p. 65 ). There are insufficient historical and current data ( m anifests, PRP records, State records, permits, waste concentration data, etc.) available to adequately calculate the total or part ial mass of the wastestream plus the mass of all CERCLA pollutants and contaminants in the source and the associated releases from the source. Therefore, there is insufficient information to evaluate the associated releases from the source to calculate the hazardous

## 41 

## wastestream quantity for Source No. 2 with reasonable confidence. Scoring proceeds to the evaluation of Tier C, Volume ( R e f

. 1 , Secti o n 2.4.2.1

. 2

, p

. 6 5 )

.

Hazardous Wastestream Quantity Assigned Value: NS

2.4.2.1.3. Volume (Tier C)

The information available on the depth of Source No. 2 is not sufficiently specific to support a volume reasonable confidence; therefore it is not possible to assign a volume (Tier C) for Source No. 2 (Ref. 1, Section 2.4.2.1.3 , p. 65 ). Source No. 2 has been assigned a value of 0 for the volume measure. As a result the evaluation of hazardous waste quantity proceeds to the evaluation of Tier D, area (Ref. 1, Section 2.4.2.1.3, p. 65 ). Volume Assigned Value: 0

2.4.2.1.4. Area (Tier D)

The horizon tal extent of Source No. 2 and the continuation of contamination between sample points have not been sufficiently determined; therefore, the source area is unknown, but greater than 0 (Ref. 1, Section 2.4.2.1.4, p. 65).

Area Assigned Value: Unknown, but > 0

2.4.2.1.5. Source Hazardous Waste Quantity Value

Area of contaminated soil source : >0 Highest assigned value assigned from Ref. 1, Table 2

- 5: > 0 Source Hazardous Waste Quantity Value: >0 (Ref. 1, Section 2.4.2.1.5, p. 65).

## 42 

## SUMMARY OF SOURCE DESCRIPTIONS

Source

No. Source Haz. Waste Quantity

Value Source Hazardous Constituent

Quantity Complete? (Y/N) Containment Factor Value by Pathway

Ground Water (GW)

(Ref. 1, Table 3

- 2) Surface Water (SW) Air

Overland/flood (Ref. 1, Table 4- 2) GW to SW (Ref. 1, Table 3

- 2) Gas (Ref. 1, Table 6

- 3) Particulate (Ref. 1, Table 6

- 9)

1 > 0 N 10 NS* NS* NS* NS*
2 > 0 N 10 NS* NS* NS* NS* *NS (Not Scored)



## Other Possible Sources

No other possible sources have been identified at the site.

## 43 

## 3.0 GROUND WATER MIGRATION PATHWAY

3.0.1 General Considerations

Ground Water Migration Pathway Description

Regional Geology/Aquifer Description:

S ubsurface materials beneath the site, the Speedway wellfield, and the Riverside wellfield are part of one continuous sand and gravel outwash plain that extends across the White River and lower Eagle Creek stream valleys (Ref. 120, pp. 6, 8, 9) . In the area of interest and the Speedway wellfi e ld, sediments consist of variable thicknesses of outwash overlyin g complexly interbedded sand and gravel and till. Thick unbroken sections of sand and gravel are present locally (Ref

. 120, p

. 11). Sediments in the Riverside wellfield consist of thick sections of sand and gravel interstratified with a few, small, widely scattered till units (Ref

. 120, p

. 11). Regionally, t he New Albany Shale underlies the sand and gravel outwash and Muskatatuck (limestone) group underlies the shale (Refs. 120; 130). However, the New Albany Shale is not present throughout the entire regio n and where the shale is absent, unconsolidated sand and gravel materials sit directly on the carbonate Muskatatuck group (Fig 1

- 5: Ref 120, p

. 10; 116, pp. 51

- 55). The aquifer is unconfined and the recharge rate is high (Ref

. 120, p p. 12

- 13).

The 4

- mile Target Distance Limit (TDL) has been established from the sources at this site as shown in Figure 1

- 5.

Local Geology/Aquifer Description:

The ground water system in the area of the West Vermont Drinking Water site consists of two hydraulically interconn ected aquifer layers/strata. These aquifers are described below.

- Aquifer/Stratum 1 (uppermost): Sand and Gravel Outwash Overburden

Description

Surficial soils near the residential wells and potential sources consist of Urban Land

- Genesee complex alon g the north bank of Little Eagle Creek and in a small area near west Vermont St in the southwest corner of the area of interest. Genesee soil consists of very deep, well drained soils that formed in flood plains along the White River and larger creeks. U rban Land

Fox complex is present through the remainder of the area of interest and in most of the land between the two creeks. Fox complex soil consists of well drained soils overlying sand and gravelly sand. (Ref

. 125)

Boring logs in the project area s how that unconsolidated sediments consist primarily of sand, with interbedded fine

- grained units between 30 and 80 feet bgs (Ref s. 40, p p

. 885

- 1113; 131; 132; 133, p p. 446

- 571). Nearby locations, notably wells MMW

- 20LA, MMW

- 21LA, MMW

- P

22LA (Ref

. 122, p p. 91

- 96, 98

- 101, 105

- 109), MW

- WES

- 01C (Ref

. 131, p 1), and MW

- WES

6D (Ref

. 132, p

. 1) show vinyl chloride contamination migrating below the fine

- grained sediments down to a depth of 70 feet (Ref s. 122, p p

. 46

- 72; 131; 132 ; Table 7 ; Table 8 ). This migration of a non

- naturally occurring contaminant (vinyl chloride) through the fine

- grained

## 44 

## sediments, and subsequent presence of contamination throughout the aquifer to a depth of at least 70 feet, demonstrates that the interbedded fine

- grained units do not act as a local barrier to ground water flow and the sand and gravel aquifer is one hydraulic unit.

- Aquifer/Stratum 2 (deepest): Limestone Bedrock

Description

The Muskatatuck group consists of crystalline limestone and lesser calcareous shales (Ref

. 120, p

. 10). Prior to glaciation, the top of the bedrock surface was exposed to weathering and underwent karst development (Ref

. 130, p

. 15). Within the Riverside wellfield, the outwash aquifer is directly on the bedrock, (Ref

. 129, p

. 23), which is relict karst, therefore, “the limestone aquifer is hydraulically connected to the outwash sand and gravel aquifer” (Ref

. 129, p. 27). The “...carbonate rocks lying...immediately beneath the outwash have undergone extensive solution

- channel development...” (Ref

. 127, p. 3). Possible solution cavities and/or voids were identified in the test piezometers cored near RS

- 29 (Ref

. 128, pp. 6, 12, 18

- 20).

Aquifer Interconnections/Distance from Source

Description

S ubsurface materials beneath the project area, the Sp eedway wellfield, and the Riverside wellfield are part of one continuous sand and gravel outwash plain that extends across the White River and lower Eagle Creek stream valleys (Ref. 120, pp. 6, 8, 9) . The thickness and extent of the finer grained material in the project area are insufficient to form a barrier to vertical contaminant migration. The finer grained unit from 35

- 50 ft bgs is not present in parts of the project area (Ref

. 16; 40, p p. 955

- 963, 986

- 997; 133, p p. 557 and 559). Additionally, the migr ation of a non

- naturally occurring contaminant (vinyl chloride) through the fine

- grained sediments, and subsequent presence of contamination throughout the aquifer to a depth of at least 70 feet bgs demonstrates that the interbedded fine

- grained units do n ot act as a local barrier to ground water flow.

Shale bedrock of the New Albany Formation (Ref

. 120, p

. 10) is present in the project area between 70

- 80 feet bgs (Ref s. 122, p p. 108, 113, 117; 131). However, the New Albany Shale is not present throughout the study area and is specifically not present within 2 miles east of the study area where unconsolidated materials (the sand and gravel outwash overburden) sit directly on the carbonate Muskatatuck group (Fig 1

- 5; Refs. 120, p. 10; 116, pp. 51

- 55). Withi n the Riverside wellfield, the outwash aquifer is directly on the bedrock, (Ref. 129, p. 23), which is relict karst. The materials in the aquifers have hydraulic conductivities that are within two orders of magnitude of one another; therefore, “the limesto ne aquifer is hydraulically connected to the outwash sand and gravel aquifer” (Ref 1, pp, 51601; 12 9, p. 27).

Additional Site Geology/Aquifer Description:

T he sand and gravel outwash overburden extends throughout the 4

- mile TDL, but specifically eastw ard in to the White River valley to the Riverside wells (Ref. 120, pp. 6, 8, 9) . There are no aquifer boundaries such as faults or mountain ranges between the project area and the Speedway or Riverside wellfields (Ref 3).

## 45 

## In 2013, Mundell performed slug t ests on seven wells near the residential wells. The hydraulic conductivity averaged 70.9 feet per day with a maximum of 141 feet per day (Ref

. 121, p. 3).

In the project area, shale bedrock of the New Albany Formation (Ref 120, p. 10) is present b etween 7 0

- 80 feet bgs (Ref s. 122, p p 108, 113, 117; 131). The New Albany Formation is between 85

- 150 feet thick in the White River basin and has low water yield (Ref 130, p p 6 and 11). In the Speedway wellfield it is not a major ground water producing unit and is considered an aquitard (Ref

. 123, p

. 10). The New Albany Shale is not present less than 2 miles east of the study area and unconsolidated materials sit directly on the carbonate Muskatatuck group (Fig 1

- 5: Ref s. 120, p

. 10; 116, pp 51

- 55).

Ground water in the project area is encountered between 14 and 18 feet bgs in monitoring wells (Ref s. 119, p p 2

- 39; 122, p p. 44

- 45). Ground water is unconfined, as evidenced by similar hydraulic heads in shallow and deep wells (Ref s. 119, p p. 2

- 39; 122, p p. 7

- 45). Little Eagle Creek does not form a hydraulic barrier, as evidenced by contamination sourced north of the creek which underflows the stream (Ref

. 119, p p. 57

- 61).

The ground water flow direction in the project area is generally towards the south w ith some components of flow to the southeast and southwest (Ref s. 119, p p. 63

- 66 ; 122 pgs 2

- 5; 38, p p. 51

- 52)

. Regional ground water flow near the Speedway wellfield southeast from the Eagle Creek valley towards the White River valley (Ref 123, p

. 12).

The stream channel of Big Eagle Creek within the lower valley has been rerouted over time. Review of historic aerial photographs from 1972, 1962, 1956, and 1941 (Ref

. 124 , pp. 2, 3, 4, 5, 6) shows that Big Eagle Creek steam channel south of Vermont St, w as originally much closer to what is now the intersection of Holt Road and Cossell Ave. The original stream channel implies that natural flow can be to the southwest as well as southeast. (Ref. 15, p. 1)

Aquifer Discontinuities within Target Distance Limit

There are no known aquifer boundaries or discontinuities present within 4 miles of the project area and the Riverside , White River, and Speedway wellfields that completely transects an aquifer in the 4

- mile TDL (Ref s. 3; 120, p p 6, 8

- 9). The Speedwa y, and Riverside wellfields are located between 1 to 3 miles from the source areas (Figure 1

- 5). The White River wellfield is located 2 to 4 miles from the source areas (Figure 1

- 5). The New Albany Shale is not present less than 2 miles east of the study area , and Little Eagle Creek does not form a hydraulic barrier, as evidenced by contamination sourced north of the creek which underflows the stream (Ref

. 119, p p. 57

- 61).

## 46 SUMMARY OF AQUIFER(S) BEING EVALUATED

Aquifer No. Aquifer Name Is Aquifer Interconnected with Upper Aquifer within

2 miles? (Y/N/NA) Is Aquifer Continuous within 4

- mile

TDL? (Y/N) Is Aquifer Karst? (Y/N)

1 Sand and Gravel Outwash Overburden NA Y N

2 Limestone Bedrock Y Y Y *



## * Karst t opography has not been confirmed to be underlying the source and continuing out to the target wells being evaluated at this time; therefore, the aquifer is not scored as karst for HRS purposes.


## The unconsolidated (Sand and Gravel Outwash Overburden) and bedrock aquifers are interconnected (Ref. 107, p. 2). The aquifer is continuous in within the 4

- mile radius ( Ref. 107

, p p

. 1

- 3 )

.

3.1 LIKELIHOOD OF RELEASE

3.1.1 Observed Release

Aquifer Being Evaluated: The interconnected unconsolidated and bedrock aquifer s
Establishing an observed release by chemical analysis requires analytical evidence of a hazardous substance in the media significantly above background level (Ref. 1, Section 2.3, p. 63). If the background concentration is not detected (or is less than th e detection limit), an observed release is established when the sample measurement equals or exceeds its own Sample Quantitation Limit (SQL) and that of the background sample. If the SQL cannot be established, the U.S. EPA Contract

- Required Quantitation L imit (CRQL) is used in place of the SQL (Ref. 1, Table 2

- 3, p. 6 3 ).

Chemical Analysis

On October 17, 21 through 31, November 26, 201 4

, and February 6, 2015, U.S. EPA Contractor staff collected ground water sampl es for the West Vermont Contaminated Drinking Water (Ref s. 43, pp.1

- 17; 45, pp. 1, 2; 54, pp. 1

- 17; 77, pp. 1

- 6; 87, pp.1, 2; 93, pp. 1

- 2589, pp. 92

- 95; 90, pp.35, 36; 91, p. 23; 92, pp. 90, 91; 94, pp. 31, 201; Tables 4, 5, 6 of this HRS Documentation Record)

. The ground water samples were analyzed for the trace volatile list of compounds. All samples were analyzed according to CLP SOW SOM01.2 (10/2006) and reviewed according to the NFG for SOM01.2 and the SOP for ESAT 5/TechLaw Validation of Contract Laboratory Program Organic Data (Version 2.7) (Refs. 89, p. 2; 90, p. 2; 91, p. 2; 92, p. 2; 94, p. 2).

## 47 

## - Background Concentrations:

EP A contractor staff obtained background ground water samples from monitoring wells and one residential private well. Table 4 below on the following pages depicts the background ground water samples, hazardous substances concentrations, and other associated sample information.

Tabl e 4 Background Ground Water Sample (Obtained from established monitoring wells and one private residential well)

EPA CLP# EPA ID Date Location Type of Ground Water Sample Depth Below Ground Surface Hazardous Substance** Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitati on Limit (CRQL)

μg/L Reference

E5AZ2 BUJ

0068 11/26/14 MW

- WVs

10 Monitoring Well 45 Feet VC

Tr ans

- 1,2

- DCE

Cis

- 1, 2

- DCE

TCE

1,1

- DCA ND

ND

ND

0.37 * (ND)

ND 0. 5

0.5

0.5

0.5

0.5 Refs. 76, pp. 7, 8; 77, pp. 1, 94, pp. 6, 7, 31, 46

- 48, 201; 101, p. 2

E5AZ3 BUJ

0069 11/26/ 14 MW

- WVS

11 Monitoring Well 53 Feet VC

Tr ans

- 1,2

- DCE

Cis

- 1, 2

- DCE

TCE

1,1

- DCA ND

ND

ND

ND

ND 0. 5

0.5

0.5

0.5

0.5 Refs. 76, pp. 7, 8, 9; 94, pp. 8,9, 31, 64

- 66, 201; 101, pp. 3, 4

E5AS5 WV

RES

4020co

s 10/17/2014 4020 Cossell Residentia l Well VC

Tr ans

- 1,2

- DCE

Cis

- 1, 2

- DCE

TCE

1,1

- DCA ND

ND

ND

ND

ND 0. 5

0.5

0.5

0.5

0.5 Ref. 54, pp. 2, 3; 89, pp. 17, 92, 147, 148, 149; 103, pp, 1, 2

E5BH3 MW 10 02/06/15 Olin Park/WVS

10 Monitoring Well 50 Feet VC

Tr ans

- 1,2

- DCE

Cis

- 1, 2

- DCE

TCE

1,1

- DCA ND

ND

0.12* (ND)

ND

ND 0. 5

0.5

0.5

0.5

0.5 Refs. 60, p. 1; 67, pp. 1- 6; 113, ; pp. 9

- 10, 37, 57

- 59

## 48 EPA CLP# EP A ID Date Location Type of Ground Water Sample Depth Below Ground Surface Hazardous Substance** Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitati on Limit (CRQL)

μg/L Reference

E5BH4 MW 10 02/06/15 Olin Park/WVS

10 Monitoring Well 50 Feet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1, 1

- DCA ND

ND

0. 11 * (ND)

ND

ND 0.5

0. 5

0. 5

0. 5

0. 5 Refs. 60, p. 1; 67, pp. 1- 6; 113, pp. 17

- 18, 37, 67

- 69

E5BH7 MW 11 02/06/15 Olin Park/WVS

11 Monitoring Well 55 Feet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1, 1

- DCA ND

ND

ND

ND

ND 0. 5

0. 5

0. 5

0. 5

0. 5 R efs. 60, p. 2; 67, pp. 1- 6; 113, pp. 25

- 26, 37, 79

- 81

E5AW8 WV

MW

- 4B

GW 10/29/14 Existing USEPA monitoring well MWWES 04b, north

side of residential

area Monitoring Well 39

- 44 f eet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1,1

- DCA ND

ND

ND

ND

ND 0.5

0. 5

0. 5

0. 5

0. 5 Refs. 38, p. 426; 85, p. 27; 92

, pp. 15

- 16, 90, 118

- 120 ; 114, p.2

E5AW9 WV

MW

- 4A 10/29/14 Existing USEPA monitoring well MWWES 04a, north

side of residential

area Monitoring Well 25

- 30 f eet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1,1

- DCA ND

ND

ND

ND

ND 0.5

0. 5

0. 5

0. 5

0. 5 Ref. 38, p. 426; 85, p.

27; 92: Pg. 17

- 18, 90, 121

-

123

## 49 EPA CLP# EPA ID Date Location Type of Ground Water Sample Depth Below Ground Surface Hazardous Substance** Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitati on Limit (CRQL)

μg/L Reference

E5AW6 WV

MW

- 10 10/21/14 Existing Allison Transmissi

on monitoring well MW

1003

- S3, north of NW corner of residential

area M onitoring Well 55 feet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1, 1

- DCA ND

ND

ND

ND

ND 0.5

0. 5

0. 5

0. 5

0. 5 Refs. 23, p. 95; 85, p. 28; 90

, pp. 18

- 19, 36, 67

- 69; 111, p. 2

E5AW5 WV

MW

- 11

-

GW 10/24/14 Existing Allison Transmissi

on monitoring well MW

1105

- S3/4,

north of residential

area Monitoring Well VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1, 1

- DCA ND

ND

ND

ND

ND 0.5

0. 5

0. 5

0. 5

0. 5 Refs. 85, p. 28; 89, pp. 71

- 72, 95, 228

- 230; 108, p. 3; 111, pp. 3, 4

E5AW0 WV

MW

- 12

-

GW 10/23/14 Existing Genuine

Parts monitoring well MW

- 135 Monitoring Well 10

- 20 f eet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1,1

- DCA ND

ND

ND

ND

ND 0.5

0. 5

0. 5

0. 5

0. 5 Refs. 36, p. 97; 85, p. 28; 89, pp. 55

- 56, 94, 204

- 206

E5AT9 WV

MW

- 13

-

GW 10/23/14 Existing Genuine

Parts monitoring well MW

154 Monitoring Well 5- 20 feet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE

T CE

1,1

- DCA ND

ND

ND

ND

ND 0.5

0. 5

0. 5

0. 5

0. 5 Refs. 36, p. 101; 85, p. 28; 89: pp. 53

- 54, 94, 201

- 203

ND* = Not Detected



## * - Samples have analyte concentrations below the quantitation limit (CRQL) and detected compounds are qualified as J values. Detection below the CRQL is treated as non

- quantifiable for HRS purposes. Result was adjusted to “Non

- Detect” (ND) using the procedure described in EPA 540 -F- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996

N D = Concentrations of analyte was at or below the CRQL and received a “ U ” qualifier, or adjusted concentrations of analyte was below the CRQL.



## - Contaminated Ground Water Samples:

I n 201 4

, U.S.EPA’s START Contractor conducted sampling activities at the West Vermont

## 50 

## Drinking Water Contamination and surrounding areas (Refs. 43, pp.1

- 17; 45, pp. 1, 2; 54, pp. 1- 17; 77, pp. 1

- 6; 87, pp.1, 2; 93, pp. 1

- 25 ; 89, pp. 92

- 95; 90, pp. 35, 36; 91, p. 23; 92, p p . 90, 91; 94, p. 31, 201 ; Tables 5 an d 6 of this HRS Documentation Record). The ground water s obtained from moni toring wells and residential wells w ere found to be contaminated with chlorinated VOCs (Ref. Sections 3.1.1 and 3.3.2.2 of this HRS documentation record ).

T he extent of the ground water plume is depicted by samples from monitoring wells and residential wells meeting observed release criteria (Figure 1- 2). The extent of this plume has not been completely delineated at this time but has been characterized by data from monitoring wells and residential wells (Ref. Section 3.1.1 of this HRS documentation record and Figure 1

- 2 of this HRS documentation re cord).

T he plume currently measures approximately 20.2 acres (Fig. 1

- 2). The area of the ground water plume is based on available samples that meet the criteria for an observed release (Section 3.1.1 of this Documentation Record). The plume boundary was digitized by connecting wells that met observed release criteria (Figure 1

- 2 of this HRS documentation record ). Background wells were identified outside the boundaries of the plume (Section 3.1.1 of this HRS documentation record ; Figure 1

- 2 of the HRS do cumentation record ).

T able 5 and Table 6 below depict the samples that meet the observed release criteria (Ref. 1, Table 2

- 3, p. 63). These tables list the organic hazardous substances with their concentrations and CRQL s for each sample. These samples qualif y as “ observed releases” based on the criteria in the HRS (Ref. 1, Section 2.3, Table 2

- 3, p. 63). The well locations are depicted on Figure 1

- 2 of this HRS documentation record

.

Table 5 Co ntaminated Gro un d Wa te r Collected by EPA from Monitoring Wells Establishing an Observed Release Utilizing CLP Laboratory

EPA CLP# EPA

Locatio n Date Location Screened Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitation Limit (CRQL)

μg/L Reference

E5AS9 WV

MW

- 3A 10/21/14 MW

- 3A 30

- 35 feet VC 1.7 0.5 Refs. 7, p. 3; 38, p. 78; 54,
p. 6; 76, pp. 5,

6; 85, p. 27; 89, pp. 25, 26, 93, 159

- 161;

93, p. 8

## 51 EPA CLP# EPA

Locatio n Date Location Screened Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitation Limit (CRQL)

μg/L Reference

E5AT0 WV

MW

- 7A 10/21/14 Existing USEPA monitoring well MWWES 07, 43

- 48 feet VC 18 0.5 Refs. 54, p. 7; 76, p. 5, 6; 84,

p. 9; ; 85, p. 27; 89, pp. 29,

30, 93, 165

- 167; 93, p. 19

E5AT3 WV

MW

- 5C 10/22/14 MW

- 5C 45

- 50 feet VC 13 0.5 Refs. 5, p. 5; 38, p. 78; 76,
p. 5; 85, p. 27; 89, pp. 35,

36, 93, 174

- 176; 93, p. 16

E5AT5

DL WV

MW

- 6A 10/23/14 MW WES 06S 25

- 30 feet VC 41 2.5 Refs. 54, p. 10; 76, pp. 5, 6; 84, pp. 5, 6; 85, p. 27; 89, pp. 37, 38, 93, 177

- 179; 93,
p. 17

E5AT6 WV

MW

- 6B 10/23/14 MW WES 06D 44

- 48 feet VC 67 5.0 Refs. 54, pp. 10; 76, pp. 5, 6; 84, p. 6; 85, p. 27; 89, pp. 41, 42, 93, 183

- 185; 93,
p. 18

E5AT7 WV

MW

- 9A 10/23/14 MWWES 09S 25

- 30 feet Cis

- 1,2

- DCE 4.8 0.5 Refs. 54, p. 10, 11; 76, pp. 5, 6; 84, p. 16; 85, p. 27; 89, pp. 45, 46, 93, 189

- 191; 93,
p. 22

E5AT7

DL WV

MW

- 9A 10/23/14 MW WES 09S 25

- 30 feet VC 170 10 Refs. 54, p. 10; 76, pp. 5, 6; 84, p. 16; 89, pp. 47, 48, 93, 192

- 194;

93, p. 22

E5AT8

DL WV

MW

- 9B 10/23/14 MW WES 09D 41

- 46 feet VC 37 2.5 Refs. 76, pp. 5, 6; 84, p. 15; 85, p. 27; 89, pp. 50, 51, 94, 195

- 197;

93, p. 23

E5AW1 WV

MW

- 16 10/ 23/14 Existing Genuine Parts

monitoring well MMW

- 166D 44

- 51 feet Trans

- 1,2

- DCE

Ci s

- 1,2

- DCE 8. 8

57 2. 5

2. 5 Refs. 54, p. 11; 76, pp. 5, 6 , 7; 85, p. 28; 89, pp. 57,

58, 94, 207

- 209; 100, p. 1211

## 52 EPA CLP# EPA

Locatio n Date Location Screened Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitation Limit (CRQL)

μg/L Reference

E5AW1

DL WV

MW

- 16 10/23/14 Existing Genuine Parts

monitoring well MMW

- 166D 44

- 51 feet TCE 670 25 Refs. 54, p. 11; 76, p. 5; 85, p. 28; 89, pp. 59, 60, 94, 210

- 212; 100,
p. 1211

E5AW2 WV

MW

- 17 10/23/14 Existing Genuine Parts

monitoring well MMW

- 148R 10.5

- 25.5 feet 1,1

- DCA

T rans

- 1,2

- DCE 1. 4

6. 4 0. 5

0. 5 Refs. 54, p. 11; 76, p. 5; 85, p. 28; 89, pp. 61, 62, 94, 213

- 215; 100, p. 1177

E5AW2

DL WV

MW

- 17 10/23/14 E xisting Genuine Parts

monitoring well MMW

- 148R 10.5

- 25.5 feet Cis

- 1,2

- DCE

T CE 29

100 5. 0

5. 0 Refs. 54, p. 12; 76, p. 5; 85, p. 28; 89, pp. 63, 64, 94,

216 - 218; 100, p. 1177

E5AW3 WV

MW

- 8A 10/24/14 Existing USEPA monitoring well MWWES 08S 27

- 32 feet VC 19 J - (19) 2.5 Ref 54, p. 12; 76, p. 5, 6, 7; 85, p. 27; 89, pp. 65, 66, 95,

219 - 221

E5AW3

DL WV

MW

- 8A 10/24/14 E xisting USEPA monitoring well MWWES 08S 27

- 32 feet Cis

- 1,2

- DCE 290 J - (290) 25 Refs. 54, p. 12; 76, p. 5, 6, 7; 84, p. 12; 85, p. 27; 89, pp. 67, 68, 95, 222 - 224; 93,
p. 20

E5AW4 WV

MW

- 8B 10/24/14 E xisting USEPA monitoring well MWWES 08D, 45

- 50 feet VC Cis

- 1,2

- DCE 1.4 J - (1.4) 17 J - (17) 0.5 0.5 Refs. 54, p. 12; 76, p. 5, 6, 7; 84, p. 11; 85, p. 27; 89, pp. 69, 70, 95, 225

- 227; 93, p. 21

E5AT4 WV

MW

- 6A 10/23/14 Existing USEPA monitoring well MWWES 06S 44

- 48 VC 47 J+ (4.7) 0.5 Refs. 54, p. 10; 76, p. 4, 5; 84, p. 5, 6; 85, p. 27; 91, pp. 8, 9, 23, 47

- 49

## 53 EPA CLP# EPA

Locatio n Date Location Screened Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitation Limit (CRQL)

μg/L Reference

E5AS8

RE WV

MW

- 3B 10/21/14 MW

- 3B 40

- 45 feet VC 8.0 0.5 Refs. 38, p. 420; 54, p. 6; 76, p. 4, 5; 85,
p. 27; 90, pp. 16, 17, 35, 64

-

66; 93, p. 9, 10

E5AX0 WV

MW

- 2A 10/29/14 MW

- 2A 23

- 30 feet Trans

- 1,2

- DCE

Ci s

- 1,2

- DCE 2. 4

18 0. 5

0. 5 Refs. 38, p. 422; 54, p. 15; 76, p. 2; 85, p. 27; 92, pp. 19,

20, 90, 124

- 126; 93, p. 4

E5AX1 WV

MW

- 15 10/29/14 Existing Michigan

Plaza monitoring well MMW

- P

- 06 18

- 28 feet Trans

- 1,2

- DCE 23J - (23) 5 Refs. 19, pp. 208, 988, 989; 54, p. 15; 76,
p. 2; 85, p. 28;

92, pp. 21, 22, 90, 127

- 129

E5AX1

DL WV

MW

- 15 10/29/14 Existing Michigan

Plaza monitoring well MMW -P- 06 18

- 28 feet VC

Ci s

- 1,2

- DCE 3, 500 J+ (350)

1, 900 J+ (190) 50

50 Refs. 19, pp. 208, 988, 989; 54, p. 15; 76, p. 2; 85, p. 28; 92, pp. 23,

24, 90, 130

- 132

E5AX2 WV

MW

- 14 10/29/14 Existing Michigan

Plaza monitoring well MMW -P10D, 28

- 38 feet Trans

- 1,2

- DCE 1.3 0.5 Refs. 19, p. 211; 54, p. 15;

76, p. 2; 92, pp. 25

- 26, 90, 133

- 135

E5AX2

DL WV

MW

- 14 10/29/14 Existing Michigan

Plaza monitoring well MMW -P10D, 28

- 38 feet VC

Ci s

- 1,2

- DCE 810 J + (81)

69 25

25 R efs. 19, p. 211; 54, p. 15; 76, p. 2; 85, p. 28; 92, pp. 27,

28, 90, 136

- 138

E5AX3 WV

MW

- 2B 10/30/14 Existing USEPA monitoring well MWWES 02b, 35

- 40 feet Trans

- 1,2

- DCE 0.90 0.5 Refs. 38. p. 78; 54, p. 16; 85, p. 27; 92, pp. 29, 30, 90, 139

- 141; 93,
p. 5

## 54 EPA CLP# EPA

Locatio n Date Location Screened Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Contract

Required Quantitation Limit (CRQL)

μg/L Reference

E5AX3

DL WV

MW

- 2B 10/30/14 Existing USEPA monitoring well MWWES 02b, 35

- 40 feet VC Cis

- 1,2

- DCE 8.2 J+ (0.82) 16 0.5 0.5 Refs. 38, p. 422; 54, p. 16; 76, p. 2; 85, p. 27; 92: Pg. 31

-

32, 90, 142

- 144

E5AX4 WV

MW

2B

- Dup 10/30/14 Existing USEPA monitoring well MWWES 02b, 35

- 40 feet VC

T rans

- 1,2

- DCE

Ci s

- 1,2

- DCE 7. 3

0. 85

13 0. 5

0. 5

0. 5 R efs. 38, p. 423; 76, p. 2; 85, p. 27; 92, pp. 33, 34, 90, 145

- 147

E5AX5 WV

MW

- 2C 10/30/14 MW

- 2C 45

- 50 feet VC

Ci s

- 1,2

- DCE 5. 4

0. 83 0. 5

0. 83 Refs. 38, p. 423; 54, p. 16; 76, p. 2; 85, p. 27; 92, pp. 35, 36, 90, 148

- 150; 93,

pp. 6, 7

E5AY2

DL WV

MW

- 1B 10/30/14 MW

- 1B 41

- 46 feet VC 32J+(3.2) 2.5 Refs. 38, p. 421;54, p. 17; 76, p. 2, 3; 85,
p. 27; 92, pp.

43, 44, 91, 160

- 162; 93,
p. 2

E5AY3

DL WV

MW

- 1B

Dup 10/30/14 MW

- 1B 41

- 46 feet VC 30J+ (3.0) 2.5 Refs. 38, p. 421; 54, p. 17; 76, p. 2, 3; 85,
p. 27; 92, pp.

51, 52, 91, 170

- 172; 93,
p. 2

E5AY4 WV

MW

- 1C 10/30/14 MW

- 1C 50

- 55 feet VC 12J+ (1.2) 0.5 Refs. 38, p. 421; 76, p. 2; 85, p. 27; 92, pp. 53, 54, 91, 173

- 175; 93,
p. 3,



## For SDG E5AS4 (Reference 76, pp 5

- 6) J- - Sample s E5AS4, E5AS6RE, E5AS7, E5AW3DL, and E5AW4 w ere analyzed outside the holdi ng t ime and result is estimated with a low bias. Results for release samples require no adjustment according to procedures described in EPA 540 -F- 94

- 028, Using Qualified Data to Document an O bserved Release and Observed Contamination, November 1996.

J+- S urrogate recoveries out of control, low in sample E5AS6RE and associated compounds are qualified bias low. Results required no adjustment according to procedures described in EPA 540 -F-

## 55 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996.

RE

- Results from rerun of sample E5AS6

DL

– Concentrations exceeded the instrument’s calibration range. Samples were reanalyzed using dilution facto r and the results and CRQL are reported from diluted analysis.

For SDG E5AT4 (Reference 76, p4) J+

– Vinyl Chloride exceeded calibration range and sample was not reanalyzed. Result is estimated with an unknown bias and adjusted according to described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996.

For SDG E5AS8 (Reference 76, p4) RE

– Results from rerun of sample E5AS8

For SDG E5AW8 (Reference 76, pp 2

- 3)

J+

- Sample E5AY4 vinyl ch loride was analyzed after a sample with a compound exceeding the calibration range and no intervening instrument blank. Detections of these compounds are estimated with unknown bias (as they may be results of or supplemented by carryover) and adjusted acco rding to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996.

J

- - Sample E5AX1 was analyzed outside the holding time and results are estimated with a low bias. Result s for release samples require no adjustment according to procedures described in EPA 540

- F

94

- 028, Using Qualified Data to Document an Observed Release and Observed Contamination, November 1996.

J+

- Surrogate recoveries were out of control, high in sampl es E5AX1, E5AX2DL, E5AX3RE, E5AY2DL, E5AY3DL, and E5AZ1DL and associated compounds are qualified bias high. Results were adjusted according to procedures described in EPA 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Release and Observed Cont amination, November 1996.

RE

- Results from rerun of sample E5AX3

DL

- Concentrations exceeded the instrument’s calibration range. Samples were reanalyzed using dilution factor and the results and CRQL are reported from diluted analysis.

## 5 6 

## Table 6 Co ntaminated Gro un d Wa te r f rom Residential Wells Samp le Tab le Results Obtained Using CLP Laboratory SDG E5AS4

EPA CLP# EPA

Locatio n Date Location Depth Below Ground Surface

(feet) Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg /L Contract Required Quantitation Limit (CRQL)

μg/L Reference

E5AS4 WV

RES

4018WV S 10/17/14 4018 West Vermont 75 Vinyl Chloride 4.9 J - (4.9) 0.5 Refs . 14, p. 11; 54, p. 3; 89, pp. 11,12, 92, 140

- 142;

102, p. 2

E5AS6R E WV

RES

4012CO S 10/17/14 4012 Cossel l 62 Vinyl Chloride 1.4 J - (1.4) 0.5 Refs, 14, p. 8; 54, p. 2; 89, pp. 21, 22, 92, 153

- 156; 102,
p. 1; 103, pp. 1, 2

E5AS7 WV

RES

4012CO S- DUP 10/17/14 4012 Cossell 62 Vinyl Chloride 4.8 J - (4.8) 0.5 Refs 14, p. 8; 54, p. 2; 89, pp. 23, 24, 92, 156

- 158; 102,
p. 1; 103, pp. 1, 2



## For SDG E5AS4 (Reference 76, p5) J- - Sample was analyzed outside the holding time and result is estimated with a low bias. Results for release samples require no adjustment according to Reference 76, page 13

- 14

RE

- Results from rerun of sample E5AS6

A bbreviations : VC Vinyl Chloride PCE Tetrachloroethene Cis

- 1,2 DCE Cis - 1,2 Dichloroethene Trans 1,2 DCE Trans 1,2 Dichloroethene TCE Trichloroethene

O ther Supporting Data

T he following table s provide additional samples to support an observed release at the site and continuous contamination throughout the aquifer.

## 57 

## Table 7 Co n t a m i n a t e d Residential G r o un d Wa te r Collected By U.S. EPA

Lab ID EPA Sample

ID. Date Location Screened Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration Reference

P10071 04

- 08 4012cos ell

- RW1

- 070710 7/7/10 4012 C o s sel l 35 feet VC 13 Refs. 13, p. 37; 14, p. 8; 40, p. 416 ; 104, p. 18

P10071 04

- 0 9 4044WV
eermont

RW2

- 07071 7/7/10 4044 West Vermont 75 feet CIS 1,2

- DCE PCE VC 1.6 J 3 J 4.7 J Refs. 13, p. 38; 40, p. 414 ; 104, pp. 19, 20

P10071 04

- 10 4140wve
rmont

RW3

- 07071 7/7/10 4140 West Vermont 36 feet PCE VC 2.2 J 2.1 J Refs. 13, p. 38; 40, p. 551 ;

104, p. 22

P10071 04

- 11 4018wve
rmont

RW4

- 07071 7/7/10 4018 West Ver m ont 75 feet PCE VC 2.0 J 1.6 J Refs. 13, p. 39; 40, p. 559 ;

104, p. 24

P10071 04

- 12 4018ver
mont

RWD

070710 7/7/10 4018 West Vermont 75 feet PCE VC 1.9 J 1.1 J Refs. 14, p. 11; 40, p. 559 ; 104, p. 26

P10071 04

- 13 4042wve
rmont

RW5

- 070710 7/7/10 4042 West Vermont 75 feet PCE 1.7 J Refs. 13, p. 39; 40, p. 646 ;

104, p. 28

P10071 04

- 14 4031cos sell

RW6

- 070710 7/7/10 4031 Cossell PCE 1.5 J Ref. 13, p. 39; 104, p. 30

505591

6001 WVS

4012CO SSEL

121211

-

GW 12/12/11 4012COSSEL 35 feet VC 26.1 Refs.14, p. 8; 40, p. 535; 105, pp. 5, 27;

51, p. 28

505591

6002 WVS

4018WV ERMON T

121211

-

GW 12/12/11 4018 West VERMONT 75 feet VC 4.8 Refs.14, p. 11; 105, pp. 7, 27 ;

51, p. 2 8

## 58 

## Table 8 Co ntaminated Gro un d Wa te r Collected by EPA from Monitoring Wells Establishing an Observed Release from the Known Sources Results Obtained Using Non

- CLP Laboratory

Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

509144

3003 WVS

MWWE S- 05B

121613

- GW 12/16/2013 WVS

MWWES

- 05B

121613

- GW 32.5

- 37.5 None Detected None Detected Ref s. 38, p. 428; 66, pp. 1, 2, 14

- 15

509144

3004 WVS

MWWE S- 05C

121613

- GW 12/16/2013 WVS

MWWES

- 05C 50 None Detected None Detected Ref s. 38, p. 429; 66, pp. 1, 2, 16, 17

5 09144

3005 WVS

MWWE S- 02A

121713

- GW 12/1 7 /2013 WVS

MWWES

- 02A 29 feet cis

- 1,2

- Dichloroethe

ne 12.7 Ref s. 38, p. 422; 66, pp. 2, 18

509144

3006 WVS

MWWE S- 02B

121713

- GW 12/17/2013 WVS

MWWES02B 40 feet cis

- 1,2

- DCE Vinyl Chloride 9.5 9.5 Ref s. 38, p. 422; 66, pp. 1, 2, 20, 21

509144

3007 WVS

MWWE S- 02C

121713

- GW 12/17/2013 WVS

MWWES

- 02C 50 feet None Detected None Detected Ref. 38, p. 423; 66, pp. 1, 2, 22,23

509144

3008 WVS

MWWE S- 01A

121713

- GW 12/17/2013 WVS

MWWES

- 01A 37.5 None Detected None Detected Ref s. 38, p. 420; 66, pp. 1, 2, 24,25

509144

3009 WVS

MWWE S- 01B

121713

- GW 12/17/2013 WVS

MWWES

- 01B 46 feet Vinyl Chloride 52.3 Ref s. 38, p. 421; 66, pp. 1, 2, 26, 27

509144

3010 WVS

MWWE S- 01C

121713

- GW 12/17/2013 WVS

MWWES

- 01C 55 feet Vinyl Chloride 24.7 Ref s. 38, p. 421; 66, pp. 1, 2, 28, 29

## 59 Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

508400

9004 WVS

MWWE S

- 03B

072313

- GW 07/23/13 Monitoring Well 3B 45 feet VC 9.4 Refs. 6, p. 4; 12, p. 6; 38, pp. 24, 424 ; 55, p. 16 ; 56, p. 4

508658

5005 WVS

MWWE S

- 03B

091013 09/10/13 Monitoring Well 3B 40.05 feet VC 7.5 Refs. 12, p. 10; 38, pp. 24, 424; 58, p. 17 ; 59, p. 4

508658

5010 WVS

MWWE S

- 02A

091113 09/11/13 Monitoring Well 2A 29.5 feet Cis

- 1,2

- DCE 13.5 Refs. 8, p. 8 ; 12, p. 11; 38, pp. 24, 42 2;

58, p. 26

508658

5011 WVS

MWWE S

- 02B

091113 09/11/13 Monitoring Well 2B 40 feet Cis

- 1,2

- DCE VC 5.4 6.8 Refs. 8,p. 9; 12, p. 11; 38,

pp. 24, 422; 58, pp. 28, 29

508658

5012 WVS

MWWE S

- 02C

091113 09/11/13 Monitoring Well 2C 45.33 feet VC 3.2 Refs. 8, p. 10; 12, p. 11; 38, pp. 24, 422

, 423; 58, p. 31 ; 68, p. 10

508658

5014 WVS

MWWE S

- 01B

091113 09/11/13 Monitoring Well 1B 36 feet VC 43.4 Refs. 8, p. 12; 12, p. 11; 38, pp. 24, 420, 421; 58, p. 35

508658

5015 WVS

MWWE S

- 01C

091113 09/11/13 Monitoring Well 1C 54.35 feet VC 11.3 Refs. 8, p. 13; 12, p. 1 2 ; 38, pp. 24, 420, 421; 58, p. 37

509026

2006 WVS

MWWE S

- 03B

111913

- GW 11/19/13 Monitoring Well 3B 45 feet VC 10.7 Refs. 10, p. 4; 12, p. 20 ; 38, pp. 24, 424; 63, p. 21 ; 68, p.4

509026

2010 WVS

MWWE S

- 02A

112013

- GW 11/20/13 Monitoring Well 2A 29 feet Cis

- 1,2

- DCE 11.8 Refs

. 10, p. 8; 12, p. 2 1; 38, pp. 24, 422; 63, p. 28 ; 68, p. 8

509026

2013 WVS

MWWE S

- 01C

112013

- GW 11/20/13 Monitoring Well 1C 55 feet VC 18.1 Refs. 10, p. 13; 12, p. 2 1;

38, pp. 24, 420, 421; 63, p. 35 ; 6 8 , p. 1 3

## 60 Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

509026

2014 WVS

MWWE S

- 02B

112013

- GW 11/20/13 Monitoring Well 2B 40 feet Cis

- 1,2

- DCE VC 7.9 7.9 Ref. 10, p. 9; 12, p. 2 1; 38, p. 422 63, pp. 36, 37 ; 68, p. 9

509026

2016 WVS

MWWE S

- 01B

112013

- GW 11/20/13 Monitoring Well 1B 46 feet VC 38.7 Refs. 10, p. 12; 12, p. 2 1; 38, pp. 24, 420, 421; 63, 40

508812

9002 WVS

MWWE

S

DUP1

- 100913

- GW 10/09/13 Monitoring Well 3B 45 feet VC 20.2 Ref s

. 7, p. 4; 12, p. 1 3 ; 38, p. 424; 61, p.

7 ; 62, p. 4

508812

9006 WVS

MWWE S

- 03B

100813

- GW 10/08/13 Monitoring Well 3B 45 feet VC 5.8 Refs. 9, p. 4; 38, pp. 24, 424; 61, p. 15 ; 62, p. 4

508812

9010 WVS

MWWE S

- 02A

100913

- GW 10/09/13 Monitoring Well 2A 29 feet Cis

- 1,2

- DCE 13.4 Refs 9, p.8; 12, p. 1 3 ; . 38, pp. 24, 422; 61, p. 22 ; 62, p. 8

508812

9011 WVS

MWWE S

- 02B

100913

- GW 10/09/13 Monitoring Well 2B 40 feet Cis

- 1,2

- DCE VC 7.2 6.7 Refs. 9, p. 9; 12, p. 1 3 ; 38, pp. 24, 422; 61, pp. 24, 25 ; 62, p. 9

508812

9012 WVS

MWWE S

- 02C

100913

- GW 10/09/13 Monitoring Well 2C 50 feet VC 3.3 Refs. 9,

- p. 10; 12, p. 1 3 ; 38, pp. 24, 422, 423; 61, p. 27 ; 62, p. 10

508812

9014 WVS

MWWE S

- 01B

100913

- GW 10/09/13 Monitoring Well 1B 46 feet VC 19.8 Refs. 9, p. 12; 12, p. 1 3 ; 38, pp. 24, 420, 421; 61, p. 31 ; 62 p. 12

## 61 Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

508812

9015 WVS

MWWE S

- 01C

100913

- GW 10/09/13 Monitoring Well 1C 55 feet TCE VC 7.4 13.5 Refs. 9, p. 13; 12, p. 1 3 ; 38, pp. 24, 420, 421; 61, p. 32, 33 ; 62, p. 13

509113

3005 WVS

MWWE S

- 03B

121113

- GW 12/11/13 Monitoring Well 3B 45 feet VC 5 Refs. 12, p. 22 ; 38, pp. 24, 424; 65,
p. 18

509272

8005 WVS

MWWE S

- 03B

012014

- GW 01/20/14 Monitoring Well 3B 45 feet VC 10.9 Refs. 12, p. 30 ; 38, pp. 24, 424; 69, p. 19

509272

8009 WVS

MWWE S

- 02A

012114

- GW 01/21/14 Monitoring Well 2A 29 feet Cis

- 1,2

- DCE 13.2 Refs. 12, p. 30 ; 38, pp. 24, 422; 69, p. 26

509272

8010 WVS

MWWE S

- 02B

012114

- GW 01/21/14 Monitoring Well 2B 40 feet Cis

- 1,2

- DCE VC 9.5 7.5 Refs. 12, p. 31 ; 38, pp. 24,

422; 69,pp. 28, 29

509277

6003 WVS

MWWE S

- 01B

012514

- GW 01/25/14 Monitoring Well 1B 46 feet VC 23.4 Refs. 12, p. 34; 38, pp. 24, 420, 421;

70, p. 14

509277

6004 WVS

MWWE S

- 01C

012514

- GW 01/25/14 Monitoring Well 1C 55 feet VC 21 Refs. 12, p. 34; 38, pp. 24, 420, 421; 70, p. 16

509363

2002 WVS

MWWE S

- 03A

021714

- GW 02/17/14 Monitoring Well 3A 35 feet VC 2 Refs. 12, p. 35; 38, pp. 24, 424; 71, p. 14

## 62 Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

509363

2003 WVS

MWWE S

- 03B

021714

- GW 02/17/14 Monitoring Well 3B 45 feet VC 11.4 Refs. 12, p. 35; 38, pp. 24, 424; 71, p.16

509363

2007 WVS

MWWE S

- 01C

021814

- GW 02/18/14 Monitoring Well 1C 55 feet VC 23.3 Refs. 12, p. 35; 38, pp. 24, 420, 421; 71, p. 24

509363

2008 WVS

MWWE S

- 01B

021814

- GW 02/18/14 Monitoring Well 1B 46 feet VC 33.3 Refs. 12, p. 35; 38, pp. 24, 420, 421; 71,
p. 26

509363

2010 WVS

MWWE S

- 02A

021914

- GW 02/19/14 Monitoring Well 2A 29 feet Cis

- 1,2

- DCE 18.1 Refs. 12, p. 36; 38, pp. 24,

422; 71, 29

509363

2011 WVS

MWWE S

- 02B

021914

- GW 02/19/14 Monitoring Well 2B 40 feet Cis

- 1,2

- DCE VC 10.2 6.2 Refs. 12, p. 36; 38, pp. 24,

422; 71, pp. 31, 32

509363

2012 WVS

MWWE S

- 02C

021914

- GW 02/19/14 Monitoring Well 2C 50 feet VC 2.8 Refs. 12, p. 36 ; 38, pp. 24, 422, 423;

71 p. 34

509363

2013 WVS

MWWE S

- 06D

021914

- GW 02/19/14 Monitoring Well 6D 49 feet VC 115 Refs. 12, p. 37 ; 71, p. 36;

84, pp. 4, 5

509363

2014 WVS

MWWE S

- 06S

021914

- GW 02/19/14 Monitoring Well 6S 30 feet VC 74.1 Ref. 12, p. 37 ; 71, p. 38; 84,
pp. 6

, 7

## 63 Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

509363

2015 WVS

MWWE S

- 09D

021914

- GW 02/19/14 Monitoring Well 9D 47 feet VC 46.4 Refs. 12, p. 37 ; 71, p. 40 ; 84, pp.14, 15

509363

2016 WVS

MWWE S

- 09S

021914

- GW 02/19/14 Monitoring Well 9S 31 feet Cis

- 1,2

- DCE VC 12.1 151 Refs. 12, p. 37 ; 71, pp. 41, 42 ; 84, pp.1 6

, 1 7

509363

2017 WVS

MWWE S

- 08D

022014

- GW 02/20/14 Monitoring Well 8D 51 feet Cis

- 1,2

- DCE VC 28.3 3.2 Refs. 12, p. 38 ; 71,p p. 43, 44; 84, pp. 10, 11

509363

2018 WVS

MWWE S

- 08S

022014

- GW 02/20/14 Monitoring Well 8S 34 feet Cis

- 1,2

- DCE VC 298 24.4 Refs. 12, p. 38 ; 71, p. 45; 84, pp. 12, 13

509363

2019 WVS

MWWE S

- 07D

022014

- GW 02/20/14 Monitoring Well 7D 70 VC 10 Refs. 12, p. 38; 17, p. 6; 71, p. 48; 84

509502

8005 WVS

MWWE S

- 03B

031714

- GW 03/17/14 Monitoring Well 3B 45 feet VC 9.1 Ref. 12, p p

. 38, 39 ; 38, p. 424; 72, p. 15

509502

8016 WVS

MWWE S

- 02A

031914

- G 03/19/14 Monitoring Well 2A 29 feet Cis

- 1,2

- DCE 17.8 Ref. 12, p. 40 ; 38, pp. 24, 422; 72, p. 29

509502

8017 WVS

MWWE S

- 02B

031914

- GW 03/19/14 Monitoring Well 2B 40 feet Cis

- 1,2

- DCE VC 8.9 3.7 Ref. 12, p. 40 ; 38, pp. 24, 422; 72, pp. 31, 32

## 64 Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

509502

8018 WVS

MWWE S

- 02C

031914

- GW 03/19/14 Monitoring Well 2C 50 feet VC 2.7 Ref. 12, p. 40 ; 38, pp. 24, 422, 423; 72, p.34

509502

8020 WVS

MWWE S

- 01B

031914

- GW 03/19/14 Monitoring Well 1B 46 feet VC 23.2 Ref. 12, p. 40 ; 38, pp. 24, 420, 421; 72, p. 38

509502

8021 WVS

MWWE S

- 01C

031914

- GW 03/19/14 Monitoring Well 1C 55 feet VC 13.7 Ref. 12, p. 40 ; 38, pp. 24, 420, 421; 72, p. 40

509502

8023 WVS

MWWE S

- 07

- 032014

- GW 03/20/14 Monitoring Well 7S 50 feet VC 7.7 Refs. 12, p. 42 ; 72, p. 44; 84, pp. 8, 9

509502

8024 WVS

MWWE S

- 06D

032014

- GW 03/20/14 Monitoring Well 6D 49 feet VC 66.9 Refs. 12, p. 42 ; 72, p. 46;

84, pp.4, 5

509502

8025 WVS

MWWE S

- 06S

032014

- GW 03/20/14 Monitoring Well 6S 30 feet VC 47.2 Refs. 12, p. 42 ; 72, p. 48;

84, pp. 6, 7

509502

8026 WVS

MWWE S

- 09D

032014

- GW 03/20/14 Monitoring Well 9D 46 feet VC 31.7 Refs. 12, p. 42 ; 72, p. 50; 84, pp.14, 15

509502

8027 WVS

MWWE S

- 09S

032014

- GW 03/20/14 Monitoring Well 9S 31 feet Cis

- 1,2

- DCE VC 7.1 133 Refs. 12, p. 42 ; 72, pp. 51, 52 ; 84, pp.1 6

, 1 7

## 65 Lab ID EPA Sample ID Date Location Depth Below Ground Surface Hazardous Substance Hazardous Substance Concentration

(Adjusted Concentration) μg/L Reference

509502

8028 WVS

MWWE S

- 08D

032014

- GW 03/20/14 Monitoring Well 8D 51 feet Cis

- 1,2

- DCE 21.3 Refs. 12, p. 42 ; 72, p. 53; 84, pp. 10, 11

509502

8029 WVS

MWWE S

- 08S

032014

- GW 03/20/14 Monitoring Well 8S 34 feet Cis

- 1,2

- DCE VC 269 20.4 Refs. 12, p. 42 ; 72, pp. 55, 56; 84, pp. 12, 13



## Attribution:

The West Vermont Drinking Water Contamination is a contaminated ground water plume originating from at least two sources where hazardous substances have been released and seeped through the ground to the aquifer.

As stated in the site history section of this HRS Documentation Record, the U.S. EPA Technical Memorandum identified three properties as potential sources of contamination in the residential area: Allison Transmission, Genuine Parts (also known as the Fo rmer Allison Transmission Plant 10), and Michigan Plaza. Each PRP property had releases of PCE or TCE, with DCE and VC as natural breakdown products (Ref. 38, p. 36) . Although chlorinated solvents are present at Allison Transmission, the data indicate that the contamination is restricted to the Allison Transmission property, and Allison Transmission is not a contributor to Residential Area well contamination (Ref. 38, p. 36 ; 48; 75 )

. Genuine Parts (GP) and Michigan Plaza (MP) are the principle sources of contamination in the deeper parts of the sand and gravel aquifer where the target receptor wells are screened. Recent EPA sampling upgradient of GP showed only trace levels of contaminant in one location. Sampling along Holt Road and Michigan Street west o f the intersection showed no detectable contamination. There are no other sources of contamination upgradient of the target receptors (Ref. 107; 124 ; Figure 1

- 2 ).

GP is directly north of Little Eagle Creek and shallow ground water contamination is contain ed on

- site, but deeper ground water underflows the creek and enters the main valley associated with the confluence of Little and Big Eagle Creeks. This is supported both by ground water gauging and contaminant concentrations in wells MW

- 165S&D, MW

- 166S&D, MMW

- 3S, MMW

- 4D, MMW

- 5D, MMW

- 6D, MMW

- 7S, and MMW

- 18D&LA. The GP contamination flowing into the lower valley is only present in wells screened greater than 10 feet below the water table. Ground water contamination related to the MP sewer release

source areas is present from the top of the water table to the sands below the first encountered

## 66 

## fine grained unit. As explained in section 3.0.1, there is no aquifer discontinuity between the water table and the top of the first fine grained unit (Ref. 107, pp. 1

- 3 ).

The two contaminant plumes are co

- mingled in the area south of the east

- west sewer line north of Michigan Street (MP main source area). South of Little Eagle Creek and north of well nests MW

- 174 and MMW

- 11, there is no detectable contamination at the wat er table. Co

mingling begins where shallow contamination is present in wells MMW

- 8S, MMW

- 9S, MMW

10S, and MMW

- 12S. As explained in section 3.0.1, shallow and deep horizons are interconnected and part of one aquifer (Ref. 74, p. 4)

.

Belo w is a brief narrative discussing the facilit ies’ business activities and any environmental investigations that were conducted

.
Genuine Parts 700 North Olin Indianapolis, Indiana

Genuine Parts is the former General Motors Corporation, Allison Gas Turbine (AGT) Divi sion Plant 10 (Ref. 36, p. 13). The facility is located on 5.4 acres (Ref

. 36 p. 1 4 ). Between 1956 and 1973, BHT Corporation operated the facility for carburetor and brake re

manufacturing (Ref. 36, p. 13). General Motors purchased the property from BHT in 1973 and used the facility for warehousing obsolete machines, tooling, and fixtures until the m id1980s, at which time the property became part of the AGT Divisio n. BHT became part of Genuine Parts through acquisition and merger, subsequent to the sale of the property to General Motors. AGT continued to use the facility for warehousing until December 1993 when the property was sold to the Allison Engine Company (AEC). AEC sold the property to Associated Properties, Inc. in 1998 (Ref. 36, p.13; 79, p. 8 ). A ssociated Properties, Inc. sold the facility to American Art Clay Company, Inc. in 2002 (Ref. 75 , p. 8 ; 36, p. 13 ). American Art Clay Company, Inc. sold the facility to the current property owner, Faris Mailing Inc., in 2012 ( Ref. 75, p. 8 ). T wo businesses, Faris Mailing and Asset Recycling conduct their operations at this property (Ref. 1 10 , p. 1).

Engineering Science, Inc. conducted two environmental investigations at the property in 1992 and 1993. The initial investigation, entitled Phase I I nformation Review Report fo r General Motors Corporation Allison Gas Turbine Division, was completed in July of 1992.The Phase I assessment identified two reported releases of quench oil in the southwest corner of the property and an unknown amount of h ydra ulic fluid in the southwest courtyard; possible waste burial area at western end of the property; and possible area of dumping near the northwest corner of the plant. The Phase I identified the Plant 10 site as a potential area of concern. The report inclu ded a recommendation to install three monitoring wells and one soil boring ( Ref. 21, p. 13 ).

An intrusive follow

- up assessment of the areas of environmental concern identified during the Phase I a ssessment was completed in November of 1993. Methods and r esults of this additional investigation were reported in a document entitled Phase II Site Assessment Final Report for General Motors Corporation Allison Gas Turbine Division Dated November 19, 1993. Results of this investigation Identified TCE, VC, 1,2

- DC E, PCE, Toluene, and methylene

c hloride in the soil on

- Site ( Ref. 21, p. 13)

.

## 67 

## According to a Feasibility Study Report, dated June 3, 1997, TCE and 1, 2

- dichloroethylene (1,2

- DCE) were the most frequently detected compounds found in soil samples collect ed from the vadose zone ( Ref. 22, p. 531; 112, p. 9). Analytical data indicate detectable TCE concentration ranged from 29 ug/ kg to 1 20,000 ug/ kg and , 1,2

- DCE concentrations ranged from 4 u g/ kg to 12 ,000 ug/ kg (Ref s . 22, p. 530; 112, p. 9). Analytical da ta indicate detectable TCE concentrations ranged from 5.4 ug/l to 13,000 ug/l, cis

- 1,2

- DCE concentrations ranged from 5.3 ug/l to 65,000 ug/l, trans

- 1,2

- DCE concentrations ranged from 5.9 ug/l to 1,400 ug/l, and detectable VC concentrations ranged from 12 ug/L to 3,400 ug/l in the ground water (Refs. 22, p. 531; 112, p. 10). A Voluntary Remediation Agreement (VRA) for the Genuine Parts site was signed January 11, 2000 by IDEM’s Deputy Assistant Commissioner (Ref. 34, pp. 1

- 17). As a result, the facility is currently being addressed by the IDEM’s Voluntary Remediation Program (VRP). The VRP ID# for the site is 6991004

. (Ref. 34, pp. 1, 2).

The presence of historic buried waste was discovered in May 2000 while installing ground water remediation system piping ( Ref. 21, p. 44; 36, p. 57 ). During this time stained soils, decayed drums, and miscellaneous small metallic debris (automotive parts) were encountered during trenching activities in the southwest corner of the site in the vicinity of a soil vapor extraction remediation system vent well

, SVE

- 8 ( Ref. 21, p. 44 ). Contaminated soil with varying amounts of debris was also encountered in the vicinity of another system vent well (SVE

- 3) and in several soil/vent boreholes. The discovery of the buried waste prompted an investigation of the entire property (excluding areas under roof) to locate other potential burial area ( Ref. 21, p. 44 ).

Hazardous waste was excavated between April 9, 2001 and July 6, 2001 ( Ref. 21, p. 50). During this time 190 loads of waste were transported and disposed at Envi r onsafe Services of Ohio, Inc. in Oregon, Ohio resulting in a total of 4,981.51 tons ( Ref. 21, p. 50 ).

Non

- hazardous waste was excavated between April 6, 2001 and May 22, 2001. During this time 264 loads of waste were transported and disposed at Twin Bridges Landfill in Danville, Indiana for a total of 4,805.20 tons ( Ref. 21, p. 50 ).

Two source areas were identified at the site: 1) an eastern source associated with former solvent operations , and (2) a weste rn source area associated with historic degreasing and industrial waste burial activities (Ref s

. 36, p. 34; 53, p. 299). The exact nature of historic operations and potential contaminant release mechanisms in the eastern source area are not known ( Ref. 36 , p. 34 ). A former solvent storage tank existed in a partially sub

- grade concrete structure that was located outside along the facility wall in this area. General Motors removed the solvent tank and concrete structure in the 1990’s (Ref. 36, p. 34). Docume ntation of this removal is not available, although based on soil data collected since that time, the removal of the tank and structure mitigated any source material in this area (Ref. 36, pp. 34, 35).

The western source area is associated with former par ts degreasing operations and waste burial activities ( Ref. 36, p. 36 ). A small anomalous area of TCE occurrence in ground water was also noted to the east of the site at the intersection of Olin Avenue and Walnut Street. This area is referred to as the E ast Bioremediation Source Area ( Ref. 53, p. 299). Refer

## 68 

## to the Final Remediation Work Plan, for a further summary of on and off

- site investigation activities (Ref. 36)

. According to a Remedial Progress Report, dated August 2014, TCE was detected as high as 620 μg/L in 2004 in monitoring well 153 (located in the western source area) ( Ref. 36, p. 179, 276 ) and as high as 1800 μg/L in 1995 in monitoring well 10 (located in the eastern sector of the property) ( Ref. 36, p. 176, 276 ). The Groundwater Potentiome tric Surface Maps completed for the investigation indicates that ground water flow is in a southern direction for the shallow monitoring wells and a southern to southwestern direction for the deep monitoring wells ( Ref. 36, p p. 255

- 265).

Michigan Plaza 2801

- 3823 West Michigan Street Indianapolis, Indiana

The site is located to the east of the intersection of West Michigan Street and Holt Road in a mixed residential commercial setting on the near west side of Indianapolis (Ref. 19, p. 14; Figure 1

- 3). The site currently consists of a strip mall along the south side of West Michigan Street and a multi

- building apartment complex to the north of the street. The apartment complex consists of several apartment buildings and support buildings on approximately 13.7 acres and the Michigan P laza facil ity consists of a single multi

- tenant retail facility covering approximately 1. 5 a cre s (Ref. 19, p. 14). AIMCO Michigan M eadows Holdings, LLC (AMMH) previously owned the two properties at the time the pre

- existing e nvironmental impacts

as sociated with historic t enant site activities were first Identified (Ref. 19, p.21).

Aimco Michigan Meadows Holdings, L.L.C. owned the subject property from December 29, 1999, until May 8, 2008. On May 8, 2008, Aimco Michigan Mea dows Holdings, L.L.C. conveyed the property to Aimco Michigan Apartments, LLC through a Quitclaim Deed. Aimco Michigan Apartments, LLC owned the subject property from May 8, 2008, until October 15, 2008. On October 15, 2008, Aimco Michigan Apartments, LLC conveyed the property to GenNx Properties VII, LLC throug h a Limited Warranty Deed (Ref. 80, p. 8)

. Historic dry

- cleaning operations at Michigan Plaza by a company called A ccent Cleaners are believed to have impacted on

- site soils, indoor air and ground water. The exact timing of subsurface impacts is not known (need Ref. 19, p. 14)

. The results of historic site investigations completed since 2001 indicate that chlorinated volatile organic chemicals are present in the subsurface soils, soil gas, indoor air

, and ground water at the site ( Ref. 19, p. 14 ). A March, 2004 ground water sample taken from a deep ground water system (MW

- 165D) indicated dissolved chlorinated solvent ground water impacts (most notably cis

- 1,2

- DCE and vinyl Chloride) beneath the Mi chigan Meadows Apartments. A vinyl chloride concentration of 720 ug/l and a cis

- 1, 2

- DCE concentration of 2,300 ug/l were exhibited (Ref. 30, pp. 2, 14). Three source areas have been identified on site. The source areas are associated with the historic s olvent discharges from the dry cleaners to a leaky sewer line ( Ref. 19, p. 14) . The source areas have been identified as a combination of leaky lines and contaminated soil and have been designated as Source Area A, B, and C ( Ref. 19, pp. 14, 15). Refer to the remediation Work Plan for a location of the source area (Ref. 19, pp. 149, 1288, 1496) . The primary chemicals of concern (COCs) for the site are PCE and its

## 69 

## breakdown products, including TCE, cis

- 1, 2 dichloroethylene (cis

- 1, 2

- DCE) and vinyl chlori de ( Ref. 19, pp. 14, 15).

A Voluntary Remediation Agreement (VRA) for the Michigan Plaza site was signed April 20, 2007 by IDEM’s Deputy Assistant Commissioner (Ref. 33, p.1). As a result, the facility is currently being addressed by the IDEM’s Voluntar y Remediation Program (VRP). The VRP ID# for the site is 6061202 ( Ref. 19, p. 1464).

Vapor mitigation systems have been installed and operated at Michigan Plaza since 2006 and at the apartment complex since 2008, to address vapor intrusion concerns. Acco rding to the VRP Remediation Work Plan (RWP), these systems will continue to operate until the cleanup objectives have been met ( Ref. 21, p. 15 ).

The ground water is currently being remediated by the injection of a bioremediation product consisting essen tially of food

- grade soybean Oil ( Ref. 19, p. 1466 ; 39 ). The injections occurred in 2007 and 2009 ( Ref. 19, pp. 55, 155

– 172) , During the second round of bioremediation injections, 16,500 pounds of bioremediation product were injected: 3,000; 4,500; and 9,000 pounds in Source Areas A, B, and C, respectively during the second round of injections ( Ref. 19, p. 55 ). The shallow plumes for cis

- 1,2

- DCE and VC compounds are larger than the PCE and TCE plumes because the previous 2007 and 2009 bioremediation injection events have facilitated the generation of the chlorinated solvent daughter products (cis

- 1,2

- DCE and VC) through sequential dechlorination ( Ref. 19, p. 71 ). It should be noted that vinyl chloride concentrations in se veral monitoring wells have increased after injections of the bioremediation product . Table 3, Cumulative Monitoring Well Ground Water Analytical Results, found in the Remediation Work Plan dated September 13, 2013, depicts a cumulative of vinyl Chloride Concentrations before and after the bioremediation injections (Ref. 19, p. 231)

As requested by IDEM, the consultant monitored methane production related to fermentation process associated with the bioremediation injections completed during July 2013 (Ref. 40, p. 64). According to an email attachment from the consultant, methane has been monitored since September 22, 2013 (Ref. 18, pp. 1

- 28) . A subset of the wells that have experienced elevated levels above 10% LEL were screened. Methane levels were in itially measured at 23,000 ppm in soil vapor extraction system SVE

- 1 and at 29,000 ppm at Monitoring well MGW

- 8D (Ref. 18, p. 1).

Monitoring wells MMW

- P03S, MMW

- P

- 08, and MW 9S have been installed near the source area (Ref. 19, pp. , 173). A release o f PCE to the ground water was detected in these monitoring wells at 397 μg/L in MMW

- P03S , 6,280 ug/l in MMW

- P

- 08 , and 782 ug/l in MW 9 (Ref. 19, pp. 232, 239, 1,313).

The consultant for Michigan Plaza samples forty

- six (46) monitoring wells on a quarterl y basis (Ref. 19, p. 110). Potentiometric Maps submitted to IDEM depict a south

- southeasterly ground water flow direction (Ref. 19, pp. 142, 143).

The Michigan Plaza facility has been active in IDEM’s VRP. The facility has been conducting soil and ground water investigations and has been attempting to remediate the source area and ground water contamination since 2007. All quarterly monitoring reports, investigative and remedial reports, and other requested documents have been submitted to

## 70 

## IDEM (Re f. 86, p. 1)

.
Hazardous Substances Released

• TCE

• trans

- 1,2

- DCE

• cis

- 1,2

- DCE

• VC

• 1,1

- DCA

Trans

- 1,2

- DCE, cis

- 1,2

- DCE, VC are degradation products of TCE and PCE (Ref. 64, pp. 1

- 5).

As specified in the HRS Rule (Ref. 1, Section 3.1.1 . p. 69 ), an observed rel ease factor value of 550 was assigned to the West Vermont Drinking Water Contamination since an observed release by chemical analysis was established to the aquifer.

Ground Water Observed Release Factor Value: 550

The ground water samples used to delineate the outline of the plume, covers approximately 20.2 acres (Figure 1

- 2 of this HRS documentation record); Sections 3.0.1 an d 3.1.1 of this HRS documentation record). The area of the ground water plume is based on available samples that meet the criteria for an observed release and the target distance limit is measured from the source of the contamination (Ref. 1; Section 3.1.1 of this HRS documentation record).

## 71 

## 3.2 WASTE CHARACTERISTICS

3.2.1 T oxicity/ M obility

The following toxicity, mobility and combined toxicity/mobility factor values have been assigned to those substances present in the observed release and /or a source with a containment value greater than 0

.

Hazardous Substance Source No. (and/or Observed Release) Toxicity Factor Value Mobility Factor Value * Does Haz ardous Substance m eet Observed Release by

chemical analysis? (Y/N) Toxicity/ Mobility (Ref. 1, Table 3

- 9) References



## 1,1

- DCA Observed Release 10 1 Y 10 Ref. 2, p. 4

1,1

- DCE 2 10 1 N 10 Ref. 2, p. 3

cis

- 1,2

- DCE 1; 2 Observed

Release 1,000 1 Y 1,000 Ref. 2, p. 8

trans

- 1,2

- DCE 2; Observed

Release 100 1 Y 100 Ref. 2, p. 10

TCE 1; 2 Observed

Release 1,000 1 Y 1,000 Ref. 2, p. 12

PCE 1 ; 2 100 1x10 - 2 

## N 1 Ref. 2, p. 16

VC 2; Observed

Release 10,000 1 Y 10,000 Ref. 2, p. 14

*All hazardous substances that meet the criteria for an observed release by chemical analysis to one or more aquifers underlying the source(s), regardless of the aquifer being evaluated, are assigned a mobility factor value of 1 (Ref. 1, Section 3.2.1.2, p. 72).



## The hazardous substance with the highest toxicity/mobility factor value available to the ground water migration pathway is vinyl chloride (10,000).

Toxicity/Mobility Factor Value: 10,000 (Ref. 1, Table 3

- 9 , p. 76 )

## 72 3.2.2 H azardous Waste Quantity

Source No. Source Type Source Hazardous Waste Quantity

1 Other Unknown, but >0



## The West Vermont Drinking Water plume has been scored as consisting of a ground water plume w ith an identified source. According to Section 2. 4 .2.2 in the HRS (Ref. 1, p p

. 65, 6 6 )

, if any target for that migration pathway is subject to Level I or Level II concentrations and the hazardous constituent quantity is not adequately determined, assign a value from Table 2

- 6 or a value of 100 whichever is greater, as the hazardous waste quantity factor value for that pathway. Because Level I concentrations were present in a drin king water well (Section 3.3.2.2 of this HRS documentation record), a hazardous waste quantity factor value of 100 is assigned for the ground water pathway.

Hazardous Waste Quantity Factor Value: 100 (Ref. 1, Table 2

- 6 , p p

. 65, 66 )

3.2.3 Waste Char acteristics Factor Category Value

As specified in the HRS (Ref. 1, Section 3.2.3, p. 76), the Hazardous Waste Quantity Factor Value of 100 was multiplied by the highest Toxicity/Mobility Value of 10,000, resulting in a product of 1,0 0 0,000. Based on this product, a Waste Characteristics Factor Category Value of 32 was assigned from Table 2

- 7 of the HRS (Ref. 1, Section 2.4.3.1, p. 66).

Utilizing vinyl chloride has the highest Toxicity/Mobility Factor Value of the substances listed in Section 3.2.1 of thi s HRS documentation record (Ref. 2, p. 14)

. Toxicity/Mobility Factor Value: 10,000 (Ref. 2, p. 14) Hazardous Waste Quantity Factor Value: 100

Hazardous Waste Quantity Factor Value: 1,000,000

Waste Characteristics Factor Category Value: 32 (Ref. 1, Table 2

- 7 , p. 66 )

## 73 

## 3.3 GROUND WATER PATHWAY TARGETS The West Vermont Drinking Water Contamination site includes two residences where ground water from private residential wells is utilized for drinking water.

3.3.1 Nearest Well Well ID: E5AS4 / E5AS7 (Duplicate of E5AS4), E5AS6 Level of Contamination (I, II, or potential): I If potential contamination, distance from source in miles: N/A

As specified in the HRS (Ref. 1, Section 3.3.1, Table 3

- 11, p p. 76, 77), if one or more drin king water wells are subject to Level I concentrations, a Nearest Well Factor Value of 50 is assigned. Level I vinyl chloride concentrations have been documented in the ground water of residential w ell s located at 4018 West Vermont (Samples E5AS4 and E5AS 7) and 4012 Cossell (Sample E5AS6) (Section 3.3.2.2 of this HRS documentation record ).

Nearest Well Factor Value: 50 (Ref. 1, Table 3

- 11)

3.3.2 Population

3.3.2.1 Level of Contamination

3.3.2.2 Level I Concentrations There are three (3 ) residents that utilize private wells for drinking water and the drinking water was found to exceed the MCL for vinyl chloride (Ref. 45, pp. 2, 3).

Table 9 Level I Concentrations

Resident Drinking Water Sample Number Vinyl Chloride Concentration μg/L (Adjusted C oncentration μg/L) Vinyl Chloride Benchmark μg/L Reference

WV

- RES

4018WVS E5AS4 4.9 J

- (4.9) .017 Ref. 2, p. 13; Table 6 of this HRS Documentation Record WV

- RES

4012COS E5AS6RE 1.4 J

- (1.4) .017 Ref. 2, p. 14 ; Table 6 of this HRS Documentation Record WV

- RES

401 2COS E5AS7 (Duplicate of E5AS6 4.8 J

- (4.8) .017 Ref. 2, p. 14 ; Table 6 of this HRS Documentation Record 2 J- - Sample was analyzed outside the holding time and result is estimated with a low bias. Results for

## 74 release samples require no adjustment according to procedures described in EPA fact sheet 540

- F

- 94

- 028, Using Qualified Data to Document an Observed Rel ease and Observed Contamination , November 1996.

RE

- Results from rerun of sample E5AS6

WV

- RES

- 4010COS

- DUP was mislabeled in the field on October 17, 2014 from a residential property and was submitted to the lab with incorrect locations. The duplicate sa mple from 4020 Cossell in fact was collected from 4012 Cossell. Therefore, the Sample Location in Ref. 89, pp. 23 should read “WV

RES

- 4012COS

- DUP” instead of “WV

- RES

- 4020COS

- DUP.”



## According to a Residential Well Information form, there are two people living at 2018 West Vermont and one person living at 4012 Cossell (Ref. 45, pp. 2, 3). Three total residents are scored

.

Level I Concentrations Factor Value: 30

3.3.2.3 Level II Concentrations Private residential water wells in which observed releases are established are subject to Level I contamination. No Level II contamination was observed

Level II Concentrations Factor Value: NS

3.3.2.4 Potential Contamination (Ref. 1, Table 3

- 11)

G round water from the White River and Riverside wells is pumped to the White River treatment plant where it blends with raw surface water, then passes through the entire surface water treatment process prior to distribution to customers (Ref. 68, p. 1)

. The Riverside and White River Municipal Well Calculations table (Ref. 138, p. 1) depicts the Well ID#, Well/Intake capacity, and population served per each well. The table explains how the population was apportioned for each w ell/intake based on capacity. The well capacity numbers for the Riverside and White River wells were supplied by Citizens Energy Group (Ref. 136, pp. 1, 2). The White River treatment plant suppl ies 60% of the population of Indianapolis (Ref. 137, p. 1). Th e population served by Citizens Water is 876,728 (Refs. 68, p. 1; 134, p. 2).

The Speedway Well Calculations table (Ref. 13 9 , p. 1) depicts the Well ID#, Well/Intake capacity, and population served per each well. The table explains how the population was apportioned for each well /intake based on c apacity. The well capacity numbers for the Speedway wells were supplied by Speedway Water Works (Ref. 141 , p. 2). The population served by Speedway Municipal wells is 11,812 (Ref. 135, p. 4).

The Municipal Well Table below depicts the depth, distance from the source area, the population apportioned to each well, the aquifer producing the water, the screen length (where applicable), the water producing interval, and references.

## 75 Municipal Well Table

Riverside Wells Depth Distance Population Apportioned Aquifer Screen Length Water Production

Interval/ Screen Interval References

RS 2 297 feet 2

- 3 Miles 4203.531 Limestone NA 225 feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138,

p. 1 ; 140, p. 2;

Figure 1

- 5

RS 7 196 feet 2

- 3 Miles 4045.898 Limestone NA NA * Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 12; Figure 1

- 5

RS 8 277 feet 2

- 3 Miles 4203.531 Limestone NA 277 feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 3; Figure 1

- 5

RS 9 251 feet 2

- 3 Miles 4413.707 Limestone NA 244 feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 4; Figure 1

- 5

RS 17 391 feet 2

- 3 Miles 3152.648 Limestone NA 370 feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 5; Figure 1

- 5

RS 18 400 feet 2

- 3 Miles 3467.913 Limestone NA 88

- ? Feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 6; Figure 1

- 5

RS 19 392 feet 1

- 2 Miles 3467.913 Limestone NA NA * Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138,

p. 1 ; 140, p. 12;

Figure 1

- 5

RS 22 271 feet 2

- 3 Miles 2627.207 Limestone NA 267 feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 7; Figure 1

- 5

RS 26 286 feet 2

- 3 Miles 3152.648 Limestone NA NA * Refs. 29, p. 5; 115, p. 3; 136, pp. 1, 2; 138, p. 1 ; 140, p. 8

RS 27 416 feet 2

- 3 Miles 4466.251 Limestone NA 98

- ? feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 9; Figure 1

- 5

RS 29 290 feet 2

- 3 Miles 3152.648 Limestone NA 285 feet Refs. 29, p. 5; 115, p. 3; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, p. 11; Figure 1

- 5

## 76 RS A 97 feet 2

- 3 Miles 2364.486 Sand and Gravel 20 feet 77

- 97 feet Refs. 29, p. 5; p. 3; 115, p. 3; 116, pp. 15, 16; 117, p. 1, 2; 136, pp. 1, 2; 138,

p. 1 ; Figure 1

- 5

RS B 80 feet 2

- 3 Miles 5254.413 Sand and Gravel NA NA * Ref. 29, p. 5; 115, p. 3; 136, pp. 1, 2; Figure 1

- 5

RS C 80 feet 2

- 3 Miles 7618.899 Sand and Gravel NA NA * Refs. 29, p. 5; 115, p. 3; 136, pp. 1, 2; 138, p. 5

RS D 74 feet 2

- 3 Miles 3888.266 Sand and Gravel NA NA * Refs. 29, p. 5; 115, p. 3; 136, pp. 1, 2; 138, p. 5 

### * According to page 1 of Reference 117, the well screens are placed at the bottom of the well.

White River Wells

WR 3 70 feet 3

- 4 Miles 7146.002 Sand & Gravel 38 feet 35

- 70 Refs. 29, p. 5; 115, p. 3; 116, p. 21; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, pp. 12, 13; Figure 1

- 5

WR 7 77 feet 3

- 4 Miles 3678.089 Sand & Gravel 20 feet 57

- 77 feet Refs. 29, p. 5; 115, p. 3; 116, p. 25; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140,

p. 13; Figure 1

- 5

WR 8 78 feet 3

- 4 Miles 10508.83 Sand & Gravel 20 feet 77 feet Refs. 29, p. 5; 115, p. 3; 116, p. 27; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ; 140, pp. 12, 13; Figure 1

- 5

WR 9 79.5 feet 2

- 3 Miles 7356.178 Sand & Gravel 20 feet 80 feet Refs. 29, p. 5; 115, p. 3; 116, pp. 29, 30; 117, p. 1; 136, pp. 1, 2; 138, p. 1 ;

140, pp. 12, 13;

Figure 1

- 5 Speedway Wells

2 78 feet 1

- 2 Miles 1,135.25 Sand & Gravel 30 feet 48

- 78 feet Refs. 29, p. 4; 115, p. 2; 116, pp. 11, 12; 118, p. 1; 139, p.1; 141, p. 2; Figure 1

- 5

3 63 feet 1

- 2 Miles 648.7143 Sand & Gravel 10 feet 53

- 63 feet Refs. 29, p. 4; 115, p. 2; 118, p. 1;

116, pp. 31, 32; 118, p. 1; 139, p. 1; 141, p. 2; Figure 1

- 5

4 69 feet 1

- 2 Miles 567.625 Sand & Gravel 10 feet 59

- 69 feet Refs. 29, p. 4; 115, p. 2; 116. pp. 33, 34; 118, p.1; 139,

p. 1; 141, p. 2;

Figure 1

- 5

6 71 feet 1

- 2 Miles 810.8928 Sand & Gravel 20 feet 51

- 71 feet Refs. 29, p. 4; 115, p. 2; 116, pp. 13, 14; 118, p.1; 139, p. 1; 141, p. 2; Figure 1

- 5

## 77 7R 69 feet 1

- 2 Miles 486.5357 Sand & Gravel 11 feet 54

- 65 feet Refs. 29, p. 4; 115, p. 2; 118, p. 1; 139, p. 1; 141, p. 2; 143 pp. 1,2; Figure 1

- 5

8R 57 feet 1

- 2 Miles 364.9018 Sand & Gravel 10 feet 47

- 57 feet Refs. 29, p. 4; 115, p. 2; 118, p. 1; 139, p. 1; 141, p. 2; 142,

p. 2; 146; 147;

Figure 1

- 5

9 64 feet 2

- 3 Miles 486.5357 Sand & Gravel 12 feet 52

- 64 feet Refs. 29, p. 4; 115, p. 2; 118, p. 1; 139,

p. 1; 141, p. 2;

Figure 1

- 5

10R 64 feet 1

- 2 Miles 486.5357 Sand & Gravel 10 feet 66 feet Refs. 29, p. 4; 115, p. 2; 116, p. 1; 118, p. 1; 139, p. 1; 141,

p. 2; Figure 1

- 5

11R 55 feet 2

- 3 Miles 608.1696 Sand & Gravel 10 feet 56 feet Refs. 29, p. 4; 118, p. 1; 139, p. 1; 141,

p. 2; Figure 1

- 5

12 72 feet 2

- 3 Miles 810.8928 Sand & Gravel 8 Feet 64

- 72 feet Refs. 29, p. 4; 115, p. 2; 116, p. 5; 118, p. 1; 139, p. 1; 141,

p. 2, ; Figure 1

- 5

13 59 feet 2

- 3 Miles 810.8928 Sand & Gravel 8 feet 60 feet Refs. 29, p. 4; 115, p. 2; 116, p. 7; 118, p. 1; 139, p. 1; 141,

p. 2; Figure 1

- 5

14R 62 feet 2

- 3 Miles 810.8928 Sand & Gravel 9 feet 60 feet Refs. 29, p. 4; 115, p. 2; 116, p. 9; 118, p. 1; 139, p. 1; 141,

p. 2; Figure 1

- 5

15 54 feet 1

- 2 Miles 405.4464 Sand and Gravel NA 54 feet Ref. 29, p. 4; 118, p. 1; 139, p. 1; 141,

p. 2; Figure 1

- 5



## There are two properties, Genuine Parts and Michigan Plaza, that contain sources for the contaminated ground water. The sources lay between the Riverside/White River and Speedway municipal well fields. The Potential Population Table below depict the distance ranges from Genuine Parts and Michigan Plaza to the municipal wells, the population s erved at each well, and the value assigned from Table 3

- 12 of Reference 1 of this HRS Documentation Record.

## 78 

## Potential Population Table

Distance Municipal/Residential Well Population Served Value assigned from Table 3

- 12 of Ref. 1 References

0

- 1/4 Miles 21 Residential Wells* 52 53 Refs. 37, p. 8 ; 109, p.1; 144, p. 1; Figure 1

- 3 of this HRS Documentation Record; Figure 1

- 5 of this HRS Documentation Record 1⁄4

- 1⁄2 Miles none Figure 1

- 5 of this HRS Documentation Record 1⁄2

- 1 Miles 13 Residential Wells** 32 17 Refs. 88, p.1; 144, p.1; Figure 1

- 5 of this HRS Documentation Record 1

- 2 Miles Speedway wells 2, 3, 4, 6, 7R, 8R, 10R, 15; Riverside Well RS 19

*** 8

, 373

. 8147 939 Ref s . 29, p p . 4

, 5; 138, p. 1 ; 139, p. 1; Figure 1

- 5 of this HRS Documentation Record 2

- 3 Miles Speedway Wells 9, 11R, 12, 13, 14R; Riverside Wells RS A, RS B, RS C, RS D, RS 2, RS 7, RS 8, RS 9, RS 17, RS 18, RS 22, RS 26, RS 27, RS 29; White River Wells WR 9, *** * 6 6

, 895

. 60 7 7 6778 Ref s . 29, p p. 4

, 5 ; 138, p. 1 ; 139, p. 1; 145; Figure 1

- 5 of this HRS Documentation Record

3

- 4 Miles White River Wells WR3, WR7, and WR8

***** 21,332.921 1306 Ref s . 29, p. 4; 138, p. 1 ; Figure 1

- 8 of this HRS Documentation Record Total 9,093

2.49 People per household (Ref. 144, p. 1 )

* 2.49 times 2 1 homes = 5 2 people ** 2.49 times 13 homes = 32 people

## 79 

## *** 1

- 2 Mile Radius Calculation (Refs. 138, p. 1 ; 139, p. 1; Figure 1

- 5) Speedway Wells Well 2 Serves 1,135.25 People Well 3 S erves 648.7143 People Well 4 Serves 567.625 People Well 6 Serves 810.8928 People Well 7R Serves 486.5357 People Well 8R Serves 364.9018 People Well 10R Serves 486.5357 People Well 15 Serves 405.4464 People Riverside Wells RS 19 Serves 3467.9 13 People

The total number of people served in the1

- 2 mile radius is 8,373.8147 people

*** * 2

- 3 Mile Calculation (Ref s

. 138, p. 1 ; 139, p. 1 ; Figure 1

- 5) Speedway Wells Well 9 Serves 486.5357 People Well 11 R Serves 608.1696 People Well 12 Serves 810.8928 People Well 13 Serves 810.8928 People Well 14R Serves 810.8928 People Riverside Wells Well RS A Serves 2364.486 People Well RS B Serves 5254.413 People Well RS C Serves 7618.899 People Well RS D Serves 3888.266 People Well RS 2 Serves 4203.531 People Well RS 7 Serves 4045.898 People Well RS 8 Serves 4203.531 People Well RS 9 Serves 4413.707 People Well RS 17 Serves 3152.648 People Well RS 18 Serves 3467.913 People Well RS 22 Serves 2627.207 People Well RS 26 Serves 3152.648 People Well RS 27 Serves 4466.251 People Well RS 29 Serves 3152.648 People White River Wells Well WR 9 Serves 7356.178 People

The total number of people served in the 2

- 3 mile radius is 66

, 895

. 6077 people

## 80 

## ***** 3

- 4 Mile Calculation (Ref. 138, p. 1 ; Figure 1

- 5) White River Wells Well WR 3 Serves 7146.002 People Well WR 7 Serves 3678.089 People Well WR 8 Serves 10508.83 People

The total number of people served in the 3

- 4 mile radius 21,332.921 people

Table 3

- 12 value of 9,093 is multiplied by .1 = 909.3

Potential Contamination Factor Value: 909

3.3.3 Resource

R e s o u r ce us e o f t h e combined a q u i f er w i t h i n t h e ta r g et d i s t a n c e l i m it do es n o t i n c l u d e any o f t h e R e s o u r ce Fact or s

. T h e r e f or e, a R e s o u r ce Fact o r v al u e o f 0 is a s s i g n ed ( R e f

. 1 , Secti o n 3.3.3

, p

. 78 )

.
Resources Factor Value: 0

3.3.4 Wellhead Protection Area

Neither t he source nor the ground water plume lie s within a Wellhead Protection Area

. Therefore, the Wellhead Protection Area Factor Value of 0 is assigned (Ref. 1, Section 3.3.4, p. 7 8; 83, pp. 65, 119, 151, 152). Wellhead P rotection Area Factor Value: 0

## 81 

# Attachment 1 HRS Scoring and Target Information Showing That Michigan Plaza Will Score on its Own

## 82 W ORKSHEET FOR COMPUTING HRS SITE SCORE For Michigan Plaza

S S 2



## 1. Ground Water Migration Pathway Score (S gw 

## ) (from Table 3

- 1, line 13) 100.00 10,000.00

2a. Surface Water Overland/Flood Migration Component (from Table 4

- 1, line 30) NS*

2b. Ground Water to Surface Water Migration Component (from Table 4

- 25, line 28) NS

2c. Surface Water Migration Pathway Score (S sw 

## ) Enter the larger of lines 2a and 2b as the pathway score. NS

3. Soil Exposure Pathway Score (S s 

## ) (from Table 5

- 1, line 22) NS

4. Air Migration Pathway Score (S a 

## ) (from Table 6

- 1, line 12) NS

5. Total of S gw 2 

## + S sw 2 

## + S s 2 

## + S a 2 

## 10,000.00

6. HRS Site Score Divide the value on line 5 by 4 and take the square root 50.00

No tes: *NS = Not Scored

## 83 HRS Table 3 -1 – Ground Water Migration Pathway Scoresheet (For Michigan Plaza )

Fac tor Categories and Factors Maximum Value Value Assigned
Likelihood of Release to an Aquifer:

1. Observed Release 550 550

2. Potential to Release:

2a. Containment 10 NS 2b. Net Precipitation 10 NS 2c. Depth to Aquifer 5 NS 2d. Travel Time 35 NS 2e. Potential to Release [lines 2a x (2b + 2c + 2d)] 500 NS 4. Likelihood of Release (higher of lines 1 and 2e) 550 550 Waste Characteristics: 4. Toxicity/Mobility (a) 10,000 5. Hazardous Waste Quantity (a) 100 6. Waste Characteristics 100 32 Targets : 7. Nearest Well 50 50 8. Population: 8a. Level I Concentrations (b) 3 0 8b. Level II Concentrations (b) NS 8c. Potential Contamination (b) 909 8d. Population (lines 8a + 8b + 8c) (b) 939 9. Resources 5 NS 10. Wellhead Protection Area 20 NS 11. Targets (lines 7 + 8d + 9 + 10) (b) 989 Ground Water Migration Score For An Aquifer: 12. Aquifer Score [(lines 3 x 6 x 11)/82,500] c 

## 550 x 32 x 989 = 17,406,400 /82,500 = 210.9 

## 100 100.00

Ground Water Migration Pathway Score:
14. Pathway Score (S gw 

## ), (highest value from line 12 for all aquifers evaluated) c 

## 100 100.00

(a) Maximum value applies to waste characteristics category (b) Maximum value not applicable

c 

## Do not round to nearest integer NS - Not Scored

## 84 

## Di stance Municipal/Residential Well Population Served Value assigned from Table 3

- 12 References

0

- 1/4 Miles 21 Residential Wells* 52 53 Ref. 52, pp. 1, 3; 37, p. 8 ; Figure 1- 3 of this HRS Documentation Record 1⁄4

- 1⁄2 Miles None 0 0 Ref. 88, p.2 1⁄2

- 1 Miles 13 Residential Wells** 32 17 Ref. 88, p.2 ; Figure 1

- 9 1

- 2 Miles Speedway Wells 2, 3, 4, 6, 7R , 15; Riverside well RS 19 ** * 7,522.3772 939 (Ref. 29, p. 5 ; Figure 1

- 9 of this Documentation Record) 2

- 3 Miles Speedway Wells 8R, 9, 10R, 11R, 12, 13, 14R; Riverside Wells RS A, RS B, RS C, RS D, RS 2, RS 7, RS 8, RS 9, RS 17, RS 18, RS 22, RS 26, RS 27, RS 29; White River Wells WR 9, *** * 67,747.0452 6778 (Ref. 29, p. 4, 5 ; Figure 1

- 9 of this Documentation Record)

3

- 4 Miles White River Wells 3, 7, 8**** * 21,332.921 1306 (Ref. 29, pp. 4 ; Figure 1

- 9 of this Documentation Record) Total 9093

*0- 1/4 Mile Radius Calculation

• 2.49 People per household (Ref. 144 ) 2.49 time s 21 homes =5 2 people

** 1⁄2 - 1 Mile Radius Calculation

• 2.49 People per household (Ref. 144 ) 2.49 times 13 homes = 32.37 peo p le P otential Population Michigan Plaza Property

## 85 

## * * * 1

- 2 Mile Radius Calculation Speedway Wells Well 2 Serves 1,135.25 People Well 3 S erves 648.7143 People Well 4 Serves 567.625 People Well 6 Serves 810.8928 People Well 7R Serves 486.5357 People Well 15 Serves 405.4464 People Riverside Wells RS 19 Serves 3467.913 People

The total number of people served in the 1

- 2 mile radius is 7,522.3772 People

* * * *2

- 3 Mile Radius Calculation Speedway Wells Well 8R Serves 364.9018 People Well 9 Serves 486.5357 People Well 10R Serves 486.5357 People Well 11 R Serves 608.1696 People Well 12 Serves 810.8928 People Well 13 Serves 810.8928 People Well 14R Serves 810.8928 People Riverside Wells Well RS A Serves 2364.486 People Well RS B Serves 5254.413 People Well RS C Serves 7618.899 People Well RS D Serves 3888.266 People Well RS 2 Serve s 4203.531 People Well RS 7 Serves 4045.898 People Well RS 8 Serves 4203.531 People Well RS 9 Serves 4413.707 People Well RS 17 Serves 3152.648 People Well RS 18 Serves 3467.913 People Well RS 22 Serves 2627.207 People Well RS 26 Serves 3152.648 People Well RS 27 Serves 4466.251 People Well RS 29 Serves 3152.648 People White River Wells Well WR 9 Serves 7356.178 People

The total number of people served in the 2

- 3 mile radius is 67,747.0452 people

## 86 

## * **** 3

- 4Miles Radius Calculation White River Wells Well WR 3 Serves 7146.002 People Well WR 7 Serves 3678.089 People Well WR 8 Serves 10508.83 People

The total number of people served in the 3

- 4 mile radius 21,332.921 people

Table 3

- 12 value of 9093 is multiplied by .1 = 909.3

Potential Contamination Factor Value: 909

Scores for Michigan Plaza

Air Pathway Not Scored Ground Water Pathway 100.00 Soil Exposure Pathway Not Scored Surface Water Pathway Not Scored HRS SITE SCORE 50.00

## 87 

# Attachment 2 HRS Scoring and Target Information Showing That Genuine Parts Will Score on its Own

## 88 WORKSHEET FOR COMPUTING HRS SITE SCORE For Genuine Parts

S S 2



## 1. Ground Water Migration Pathway Score (S gw 

## )
100.00 10,000.00

2a. Surface Water Overland/Flood Migration Component (from Table 4

- 1, line 30) NS *

2b. Ground Water to Surface Water Migration Component (from Table 4

- 25, line 28) NS

2c. Surface Water Migration Pathway Score (S sw 

## ) Enter the larger of lines 2a and 2b as the pathway

score. NS

3. Soil Exposure Pathway Score (S s 

## ) (from Table 5

- 1, line 22) NS

4. Air Migration Pathway Score (S a 

## ) (from Table 6

- 1, line 12) NS

5. Total of S gw 2 

## + S sw 2 

## + S s 2 

## + S a 2 

## 10,000.00

6. HRS Site Score Divide the value on line 5 by 4 and take the square root 50.00

Notes: *NS = Not Scored

## 89 HRS Table 3

- 1

– Ground Water Migration Pathway Scoresheet (For Genuine Parts )

Factor Categories and Factors Maximum
Value Value Assigned
Likelihood of Release to an Aquifer:

1. Observed Release 550 550

2. Potential to Release:

2a. Containment 10 NS
2b. Net Precipitation 10 NS

2c. Depth to Aquifer 5 NS
2d. Travel Time 35 NS

2e. Potential to Release [lines 2a x (2b + 2c + 2d)] 500 NS

5. Likelihood of Release (higher of lines 1 and 2e) 550 550

Waste Characteristics:
4. Toxicity/Mobility (a) 10,000

5. Hazardous Waste Quantity (a) 100
6. Waste Characteristics 100 32 Targets :
7. Nearest Well 50 50
8. Population:
8a. Level I Concentrations (b) 30
8b. Level II Concentrations (b) NS
8c. Potential Contamination (b) 909 8d. Population (lines 8a + 8b + 8c) (b) 939

9. Resources 5 NS

10. Wellhead Protection Area 20 NS

11. Targets (lines 7 + 8d + 9 + 10) (b) 989 Ground Water Migration Score For An Aquifer:

12. Aquifer Score [(lines 3 x 6 x 11)/82,500] c


### 550 x 32 x 989 =17,406,400/82,500 =210.9 100 100.00

Ground Water Migration Pathway Score:

15. Pathway Score (S gw 

### ), (highest value from line 12 for all aquifers evaluated) c 

### 100 100.00

(a) Maximum value applies to waste characteristics category (b) Maximum value not applicable

c 

### Do not round to nearest integer NS - Not Scored

## 90 

## Potential Population

Distance Municipal/Residential Well Population Served Value assigned from Table 3

- 12 References

0

- 1/4 Miles 23 Residential Wells* 57 53 Ref. 52, pp. 1, 3; 37, p. 8 ; Figure 1

- 3 of this HRS Documentation Record 1⁄4

- 1⁄2 Miles none Figure 1

- 8 1⁄2

- 1 Miles 13 Residential Wells ** 32 17 Ref. 88, p. 2 ; Figure 1

- 8 1

- 2 Miles Speedway wells 2, 3

, 4, 6, 7R , 8R, 10R, 15 ; Riverside Well RS 19

** * 8,373.8147 939 (Ref. 29, p p . 4

, 5; Figure 1

- 8 of this HRS Documentation Record ) 2

- 3 Miles Speedway Wells 9, 11R, 12, 13, 14R; Riverside Wells RS A, RS B, RS C, RS D, RS 2, RS 7, RS 8, RS 9, RS 17, RS 18, RS 22, RS 26, RS 27, RS 29; White River Wells WR 9, *** * 66,895.6077 6778 (Ref. 29, p p. 4

, 5 ; Figure 1

- 8 of this HRS Documentation Record )

3

- 4 Miles White River Wells 3, 7, 8***** 21,332.921 1306

Total 9093

* 0

- 1/4 Mile Radius Calculation

• 2.49 People per household (Ref. 144 ) 2.49 times 23 homes =57 people

** 1⁄2

- 1 Mile Radius Calculation

• 2.49 People per household (Ref. 144 ) 2.49 times 13 homes = 32.37 peo p le

## 91 

## *** 1

- 2 Mile Radius Calculation (Refs. 138, p. 1; 139, p. 1; Figure 1

- 5) Speedway Wells Well 2 Serves 1,135.25 People Well 3 S erves 648.7143 People Well 4 Serves 567.625 People Well 6 Serves 810.8928 People Well 7R Serves 486.5357 People Well 8R Serves 364.9018 People Well 10R Serves 486.5357 People Well 15 Serves 405.4464 People Riverside Wells RS 19 Serves 3467.913 People

The total number of people served in the1

- 2 mile radius is 8,373.8147 people

  2

- 3 Mile Calculation (Ref s

. 138, p. 1; 139, p. 1 ; Figure 1

- 5) Speedway Wells Well 9 Serves 486.5357 People Well 11 R Serves 608.1696 People Well 12 Serves 810.8928 People Well 13 Serves 810.8928 People Well 14R Serves 810.8928 People Riverside Wells Well RS A Serves 2364.486 People Well RS B Serves 5254.413 People Well RS C Serves 7618.899 People Well RS D Serves 3888.266 People Well RS 2 Serves 4203.531 People Well RS 7 Serves 4045.898 People Well RS 8 Serves 4203.531 People Well RS 9 Serves 4413.707 People Well RS 17 Serves 3152.648 People Well RS 18 Serves 3467.913 People Well RS 22 Serves 2627.207 People Well RS 26 Serves 3152.648 People Well RS 27 Serves 4466.251 People Well RS 29 Serves 3152.648 People White River Wells Well WR 9 Serves 7356.178 People

The total number of people served in the 2

- 3 mile radius is 66,895.6077 people

## 92 

## ** *** 3

- 4 Mile Calculation (Ref. 138, p. 1 ; Figure 1

- 5) White River Wells Well WR 3 Serves 7146.002 People Well WR 7 Serves 3678.089 People Well WR 8 Serves 10508.83 People

The total number of people served in the 3

- 4 mile radius 21,332.921 people

Table 3

- 12 value of 9,093 is multiplied by .1 = 909.3

Potential Contamination Factor Value: 909

Scores for Genuine Parts

Air Pathway Not Scored Ground Water Pathway 100.00 Soil Exposure Pathway Not Scored Surface Water Pathway Not Scored HRS SITE SCORE 50.00