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PETITIONED PUBLIC HEALTH ASSESSMENT

ATLANTA GAS LIGHT COMPANY
AUGUSTA, RICHMOND COUNTY, GEORGIA


APPENDIX A: SITE MAPS

Augusta MGP Site
Figure A-1. Augusta MGP Site

Site Plan
Figure A-2. Site Plan

Augusta Canal System Circa 1979
Figure A-3. Augusta Canal System Circa 1979

Third Level Canal Study Area
Figure A-4. Third Level Canal Study Area


APPENDIX B: AGL SITE HISTORY

DATE EVENT
January 1992 Preliminary Assessment (PA). AGL reviewed all available data, conducted on- and off-site reconnaissances, developed a historical ownership narrative, collected 7 surface soil and 7 groundwater samples, and surveyed the groundwater and surface water pathways. (Atlanta Gas Light Company, 1974; Edison Electric Institute, 1984; Atlanta Journal, 1996).
March 1996 Site Investigation (SI). AGL explored subsurface soils; installed groundwater monitoring well; collected and analyzed 12 surface soil, 47 subsurface soil, 9 sediment, 4 surface water, and 14 groundwater samples; evaluated the soil's physical characteristics; conducted ambient air monitoring; and reviewed the available geologic literature. Results of the sampling events are summarized in Tables 1 through 14.
March 1996 Draft RI. AGL conducted the RI in five phases: Phase I took place from April to June 1994, and Phase II was performed from October 1995 through January 1996. The RI activities consisted of field investigations, laboratory sample analyses, and data evaluation. Sampling events conducted during the PA and SI are summarized in the RI. Results of the sampling events are summarized in Tables 1 through 14 (Georgia Department of Natural Resources, 1997).
September 1996 Petition for public health assessment received at ATSDR.
October 1996 Petitioner submits results of a door-to-door survey of health concerns of area residents to ATSDR.
January 1997 ATSDR staff met with AGL representatives. The group discussed previous site sampling activities and ATSDR requested data for the scoping report.
January 1997 Site visit. ATSDR, Georgia Department of Health, Augusta Health Department, and AGL representatives participated in a site visit. An AGL representative provided a tour and describes the planned site remediation activities.
January 1997 ATSDR staff met with petitioners. ATSDR, Georgia Department of Health, Augusta Health Department, and ERG representatives met with the petitioners at the Trinity CME Church.
January 1997 RI of the Third Level Canal. The results of the RI indicate that contaminants from the site are present in canal sediments within the study area. The RI was authorized to determine possible approaches for addressing the effects on the canal (Weston, 1997).
February 1997 RI/FS of the Western Parcel. The FS recommends excavating surface soils that exceed landfill management action levels and bioremediating groundwater in situ. Remedial activities are scheduled to occur during the summer of 1997.


APPENDIX C: DEMOGRAPHIC INFORMATION

Demographic Statistics
Demographic Statistics


APPENDIX D: ENVIRONMENTAL DATA TABLES

Table 1. Groundwater Summary Data
Atlanta Gas Light, Augusta, GA
On-Site

Groundwater samples taken from on-site monitoring wells and geoprobe locations on the Northern and Southern Parcels.
Contaminant Frequency of Detection Concentration Range (ppb) Location of Maximum Detected Concentration
Volatile Organic Compounds
Benzene 21/56 ND - 64,000 MW-12
PAHs
Chrysene 4/30 ND - 6 MW-15
Fluoranthene 13/51 ND - 1,200 MW-3 1
Naphthalene 33/51 ND - 54,000 MW-13
Pyrene 15/51 ND - 1,900 MW-3
Inorganic compounds
Arsenic 13/40 ND - 27.5 MW-3

MW = Monitoring Well
ND = Not Detected
ppb = parts per billion

Source: Law Engineering and Environmental Services, Inc., 1996.

1 MW-3, along with monitoring wells MW-1 and MW-2, were abandoned during the Site Investigation due to the presence of free product.


Table 2. Groundwater Summary Data
Atlanta Gas Light, Augusta, GA
Western Parcel

Contaminant Frequency of Detection Concentration Range (ppb) Location of Maximum Detected Concentration
Volatile Organic Compounds
Benzene 3/12 ND - 1,200 GP-411
Chloromethane 1/12 ND - 39 GP-413
Methylene chloride 3/12 ND - 16 UMW-17, 18,19
Styrene 1/12 ND -110 GP-411
Toluene 1/12 ND - 630 GP-411
Total BTEX 3/12 ND - 2,010 GP-411
PAHs
Naphthalene 3/9 ND - 9,800 GP-411
Inorganic compounds
Aluminum 3/3 4,450 - 99,400 UMW-18
Calcium 3/3 23,000 - 88,200 UMW-19
Chromium 4/6 ND - 140 UMW-18
Cobalt 3/3 26.8 - 116 UMW-18
Iron 3/3 26.4 - 24,400 UMW-19
Lead 3/6 ND - 73.4 UMW-19
Magnesium 3/3 14,400 - 28,400 UMW-18
Manganese 3/3 981 -2,250 UMW-18
Nickel 7/10 ND - 536 MW-19
Potassium 3/3 3,410 - 10,100 UMW-18
Sodium 3/3 60,300 - 69,400 UMW-17
Vanadium 4/7 ND - 234 UMW-18

GP = Geoprobe
MW = monitoring well
NA = Not Available
ND = Not Detected
ppb = parts per billion
UMW = monitoring well (unfiltered)

Source: Remediation Technologies, Inc., 1997a.


Table 3. Air Monitoring Summary Data
Atlanta Gas Light, Augusta, GA
On-Site

Upwind and downwind site perimeter air sampling results from sampling events between January 6, 1997, and June 5, 1997.
Contaminant Frequency of Detection Concentration Range (ppm) Location of Maximum Detected Concentration Air Comparison Value (ppm)
Volatile Organic Compounds
Benzene 12/82 ND - 0.05 Downwind (South 4/9/97) 0.00003 CREG
Toluene 10/82 ND - 0.02 Downwind (South 4/9/97) 1 EMEG (Chronic)
Xylene 1/82 ND - 0.02 Downwind (South 4/9/97) 0.1 EMEG (Chronic)
PAHs
Fluorene 6/82 ND - 0.0004 Downwind (South 3/29/97) NA
Naphthalene 27/82 ND - 0.01* Downwind (South 3/29/97) 0.002 EMEG (Chronic)
Phenanthrene 1/82 ND - 0.0001 Downwind (South 3/29/97) NA
Inorganic compounds
Lead 1/25 ND - 0.0003 Downwind (West 5/21/97) NA
Physical Characteristic
Dust (total)
mg/m3
8/26 ND - 1.1
(mg/m3)
Downwind (North 5/20/97) NA

CREG = Cancer Risk Evaluation Guide
ND = Not Detected
EMEG = Environmental Media Evaluation Guide
ppb = parts per billion
NA = Not Available
ppm = parts per million

Sources: Atlanta Gas Light Company, 1997; Hofferbert, 1997.
* Results are approximate.


Table 4. On-Site Surface Water Summary Data
Atlanta Gas Light, Augusta, GA
Third Level Canal

Three surface water samples (SW-02, SW-03, and SW-04) collected on February 13, 1992, as part of the SI.
Contaminant Frequency of Detection Concentration Range (ppb) Location of Maximum Detected Concentration
Volatile Organic Compounds
Methylene chloride 2/3 ND - 110 SW-02
PAHs
Benzo(a)anthracene 1/2 ND - 0.6 SW-04
Benzo(a)pyrene 1/2 ND - 0.4 SW-04
Benzo(b)fluoranthene 1/2 ND - 0.3 SW-04
Chrysene 1/2 ND - 0.6 SW-04
SVOCs   
Dibenzofuran 1/2 ND - 0.6 SW-04
Di-n-octyl phthalate 1/2 ND - 0.9 SW-04
Inorganic compounds
Aluminum 2/3 ND - 924 SW-04
Calcium 3/3 20,000 - 39,500 SW-02
Iron 3/3 435 - 5,320 SW-03
Magnesium 2/3 ND - 11,000 SW-02
Manganese 3/3 46.2 - 801 SW-04
Sodium 3/3 27,000 - 36,400 SW-04

NA = Not Available
SI = Site Investigation
ND = Not Detected
SW = Surface Water
ppb = parts per billion

Source: Remediation Technologies, Inc., 1997b.


Table 5. On-Site Sediment Summary Data
Atlanta Gas Light, Augusta, GA
Third Level Canal

Samples collected during the PA, SI, and Phase I and II RI.
Contaminant Frequency of Detection Concentration Range (ppm) Location of Maximum Detected Concentration Soil Comparison Value Pica/Child/Adult (ppm)
Volatile Organic Compounds
Benzene 7/18 ND - 150 SD-02 20 CREG
Ethylbenzene 5/18 ND - 270 SD-02 200/5,000/70,000 RMEG
PAHs
Benzo(a)pyrene 16/18 ND - 370 SD-03 0.1 CREG
Chrysene 16/18 ND - 380 SD-03 0.11 CREG
Fluoranthene 16/18 ND - 550 SD-02 80/2,000/30,000 RMEG
Naphthalene 11/18 ND - 2,100 SD-02 40/1,000/10,000 EMEG
(Intermediate)
Pyrene 10/18 ND - 540 SD-103 60/2,000/20,000 RMEG
Inorganic compounds
Arsenic 13/18 ND - 62.1 SD-06 0.6/20/200 EMEG
(Chronic)
Chromium 15/15 9.4 - 486 SD-221 10/300/4,000 RMEG
Lead 15/15 66.8 - 9,420 SD-02 75 GA HSRA2

CREG = Cancer Risk Evaluation Guide
PA = Preliminary Assessment
EMEG = Environmental Media Evaluation Guide
RI = Remedial Investigation
ND = Not Detected
RMEG = Reference Dose Media Evaluation Guide
ppm = parts per million
SD = Sediment
SI = Site Investigation

Source: Remediation Technologies, Inc., 1997b.

1 There is no comparison value available for chrysene so the most conservative PAH comparison value for benzo(a)pyrene is used.

2 The 75 ppm comparison value represents a highly conservative screening value for residential soils. The GA EPD has approved a cleanup level of 400 ppm for lead at the Southern and Western Parcels. A site-specific cleanup level for lead has not yet been established for the Northern Parcel, but it is likely to also be 400 ppm (Fonk, 1998).


Table 6. Summary of the Analyses for Hazardous Waste Characterization of Tar-Like Materials
Atlanta Gas Light, Augusta, GA
Site-Wide

Samples of 7 tar-like materials taken from the Northern and Southern Parcels during the RI, analyzed via TCLP.*
Contaminant Frequency of Detection Concentration Range (ppm) Location of Maximum Detected Concentration
Volatile Organic Compounds
Benzene 7 0.23 - 1,5001 MP-14P
Chlorobenzene 1 ND - 0.09 SB-104
SVOCs
2-Methylphenol 3 ND - 0.055 SB-102
3&4-Methylphenol 3 ND - 0.055 SB-102
Inorganic compounds
Arsenic 1 ND - 0.044 MP - 14P
Barium 6 ND - 1.40 SB-103
Cadmium 2 ND - 0.004 SB-106
Chromium 2 ND - 0.008 SB-102
Lead 6 ND - 2.18 SB-103

ND = Not detected
ppm = part per million
TCLP = Toxicity Characteristics and Leaching Procedure

Source: Law Engineering and Environmental Services, Inc. 1996.

* AGL also performed TCLP analysis on product and water samples (HP-01 and HW-01) collected from Gas Holder No. 5.

1 The next highest benzene TCLP result was 4.3 ppm at SB102.


Table 7. Surface Soil Summary Data
Atlanta Gas Light, Augusta, GA
On-Site

Samples taken during the PA, SI, and RI at 0 to 2 feet bgs (data from the top 0 to 3 inches of soil are not available).
Contaminant Concentration Range (ppm) Location of Maximum Detected Concentration Soil Comparison Value Pica/Child/Adult (ppm)
Volatile Organic Compounds
Benzene ND - 130 SS-03 20 CREG
Ethylbenzene ND - 120 SS-03 40/1,000/10,000 EMEG (Intermediate)
PAHs  
Benzo(a)pyrene ND - 2,700 SS-02PA 0.1 CREG
Chrysene ND - 3,500 SS-02PA 0.11 CREG
Fluoranthene 0.93 - 3,700 SS-02PA 80/2,000/30,000 RMEG
Naphthalene ND - 9,900 SS-02PA 40/1,000/10,000 EMEG (Intermediate)
Phenanthrene ND - 11,000 SS-02PA 40/1,000/10,0002 EMEG (Intermediate)
Pyrene 1.7 - 6,500 SS-02PA 60/2,000/20,000 RMEG
Inorganic compounds
Arsenic ND - 36.6 SB-01A 0.6/20/200 EMEG (Chronic)
Chromium ND - 25.8 SB-38A 10/300/4,000 RMEG
Lead ND - 251 SS-05PA 75 GA HSRA3
Cyanide ND - 379 SB-01A 40/1,000/10,000 RMEG

bgs = below ground surface
CREG = Cancer Risk Evaluation Guide
EMEG = Environmental Media Evaluation Guide
GA HSRA = Georgia Hazardous Sites Response Act criteria for residential soil
GP = Geoprobe
NA = Not Available
ND = Not Detected
PA = Preliminary Investigation
PA = Preliminary Investigation
ppm = parts per million
RI = Remedial Investigation
RMEG = Reference Dose Media Evaluation Guide
SB = Soil Boring
SI = Site Investigation
SS = Surface Soil

Source: Law Engineering and Environmental Services, Inc., 1996.

1 There is no comparison value available for chrysene so the most conservative PAH comparison value for benzo(a)pyrene is used.
2 No comparison value is available for phenanthrene so the naphthalene comparison value is used.
3 The GA EPD has approved a cleanup level of 400 ppm for lead at the Southern Parcel. A site-specific cleanup level for lead has not yet been established for the Northern Parcel, but it is likely to also be 400 ppm (Fonk, 1998).


Table 8. Surface Soil Summary Data
Atlanta Gas Light, Augusta, GA
Western Parcel

Samples taken at 0 to 2 foot depths bgs (data from the top 0 to 3 inches of soil are not available).
Contaminant Frequency of Detection Concentration Range (ppm) Location of Maximum Detected Concentration Soil Comparison Value (ppm) Pica/Child/Adult
Volatile Organic Compounds
1,1,1-Trichloroethane 2/7 ND - 0.510 USS-04PA NA
PAHs
Acenaphthylene 1/15 ND - 51.0 HA-202 40/1,000/10,0001
EMEG (Intermediate)
Benzo(a)anthracene 11/15 ND - 24.0 HA-202 0.12 CREG
Benzo(b)fluoranthene 9/15 ND - 67.0 HA-202 0.12 CREG
Benzo(k)fluoranthene 4/15 ND - 75.0 HA-202 0.12 CREG
Benzo(a)pyrene 10/15 ND - 50.0 HA-202 0.12 CREG
Benzo(g,h,i)perylene 10/15 ND - 44.0 HA-202 0.12 CREG
Chrysene 10/15 ND - 34.0 HA-202 0.12 CREG
Dibenzofuran 4/15 ND - 1.3 USB-31A NA
2-Methylnaphthalene 7/15 ND - 25.0 USB-31A NA
Inorganic compounds
Aluminum 15/15 1,120 - 18,400 GP-409 NA
Calcium 15/15 617 - 3,300 HA-202 NA
Iron 15/15 6,810 - 45,200 USS-04PA NA
Lead 24/24 4.4 - 381 SS-201 75 GA HSRA3
Magnesium 15/15 53.9 - 3,460 GP-415 NA
Manganese 15/15 16.0 - 311 HA-202 NA
Potassium 15/15 70.2 - 1,270 GP-409 NA

bgs = below ground surface
CREG = Cancer Risk Evaluation Guide
EMEG = Environmental Media Evaluation Guide
GA HSRA = Georgia Hazardous Sites Response Act criteria for residential soil
NA = Not Available
ND = Not Detected
ppm = parts per million

Source: Remediation Technologies, Inc., 1997a.

1 There is no comparison value available for acenaphthylene so the naphthalene comparison value is used.
2 There is no comparison value available so the most conservative comparison value for benzo(a)pyrene is used.
3 The GA EPD has approved a cleanup level of 400 ppm for lead at the Western Parcel.


Table 9. Subsurface Soil Summary Data
Atlanta Gas Light, Augusta, GA
On-Site

Soil samples taken at depths greater than 2 feet bgs.
Contaminant Concentration Range (ppm) Location of Maximum Detected Concentration Soil Comparison Value Pica/Child/Adult (ppm)
Volatile Organic Compounds
Benzene ND - 190 SB-23B 20 CREG
Toluene ND - 120 SB-26A and SB-26B 40/1,000/10,000 EMEG (Intermediate)
Ethylbenzene ND - 290 SB-23B 200/5,000/70,000 RMEG
PAHs
Benzo(a)pyrene ND - 400 SB-15B 0.1 CREG
Chrysene ND - 870 SB-15B 0.11 CREG
Fluoranthene ND - 530 SB-15B 80/2,000/30,000 RMEG
Naphthalene ND - 8,600 SB-27A 40/1,000/10,000 EMEG (Intermediate)
Pyrene ND - 1,300 SB-15B 60/2,000/20,000 RMEG
Inorganic compounds
Arsenic ND - 8.1 SB-15B 0.6/20/200 EMEG
(Chronic)
Chromium ND - 34.5 SB-09A 10/300/4,000 RMEG
Lead ND - 5,400 SB-07A 75 GA HSRA2
Cyanide ND - 44.6 SB-10B 40/1,000/10,000 RMEG

bgs = below ground surface
CREG = Cancer Risk Evaluation Guide
EMEG = Environmental Media Evaluation Guide
GA HSRA = Georgia Hazardous Sites Response Act criteria for residential soil
ND = Not Detected
ppm = parts per million
RMEG = Reference Dose Media Evaluation Guide

Sources: Law Engineering and Environmental Services, Inc., 1996. Preliminary Assessment and Site Investigation Data Tables (1991 and 1992).

1 There is no comparison value available so the most conservative comparison value for benzo(a)pyrene is used.
2 The GA EPD has approved a cleanup level of 400 ppm for lead at the Southern Parcel. A site-specific cleanup level for lead has not yet been established for the Northern Parcel, but it is likely to also be 400 ppm (Fonk, 1998).


Table 10. Subsurface Soil Summary Data
Atlanta Gas Light, Augusta, GA
Western Parcel

Samples taken from 25 locations at depths greater than 2 feet bgs.
Contaminant Frequency of Detection Concentration Range (ppm) Location of Maximum Detected Concentration Soil Comparison Value Pica/Child/Adult (ppm)
Inorganic compounds
Aluminum 25/25 593 - 41,600 USB-32A NA
Calcium 24/25 ND - 2,210 USB-19A NA
Iron 25/25 2,810 - 38,700 USB-31B NA
Magnesium 25/25 1,100 - 4,700 GP-413 NA
Manganese 25/25 11.5 - 288 HA-205 NA
Potassium 24/25 ND - 1,700 GP-413 NA

bgs = below ground surface
GP = Geoprobe
NA = Not Available
ND = Not Detected
ppm = parts per million

Source: Remediation Technologies, Inc., 1997a.


Table 11. Groundwater Summary Data
Atlanta Gas Light, Augusta, GA
Off-Site

Groundwater samples taken from off-site monitoring wells and geoprobe locations.
Contaminant Frequency of Detection Concentration Range (ppb) Location of Maximum Detected Concentration
Volatile Organic Compounds
Benzene 1/35 ND - 3 MW-22
PAHs
Chrysene 2/34 ND - 8 GP-214
Naphthalene 4/34 ND - 450 MW-209
Inorganic compounds
Arsenic 1/8 ND-2.9 MW-208
Lead 3/4 ND - 18.9 MW-208

GP = Geoprobe
MW = Monitoring Well
ND = Not Detected
ppb = parts per billion

Source: Law Engineering and Environmental Services, Inc., 1996.

1 There is no comparison value available for chrysene so the most conservative PAH comparison value for benzo(a)pyrene is used.


Table 12. Off-Site Surface Water Summary Data
Atlanta Gas Light, Augusta, GA
Third Level Canal

One off-site surface water sample taken on February 13, 1992.
Contaminant Frequency of Detection Concentration Range (ppb) Location of Maximum Detected Concentration
Volatile Organic Compounds
Methylene chloride 1/1 59 SW-01
Inorganic compounds
Calcium 1/1 45,500 SW-01
Iron 1/1 1,240 SW-01
Magnesium 1/1 11,300 SW-01
Manganese 1/1 115 SW-01
Potassium 1/1 5,440 SW-01
Sodium 1/1 26,100 SW-01

NA = Not Available
ppb = parts per billion
RI = Remedial Investigation
SW = Surface Water

Source: Remediation Technologies, Inc., 1997b.


Table 13. Surface Soil Summary Data
Atlanta Gas Light, Augusta, GA
Off-Site

Samples collected as part of the RI at 0 to 2 feet bgs (data from the top 0 to 3 inches of soil are not available).
Contaminant Concentration Range (ppm) Location of Maximum Detected Concentration Soil Comparison Value Pica/Child/Adult (ppm)
PAHs  
Benzo(a)pyrene ND - 2.7 HA-212 0.1 CREG
Chrysene ND -2.5 HA-212 0.11 CREG
Inorganic compounds
Arsenic 0.19 - 8.2 GP-215 0.6/20/200 EMEG(Chronic)
Chromium 6.3 - 21.1 HA-207 10/300/4,000 RMEG
Lead 7.2 - 7,290 HA-219 75 GA HSRA2

bgs = below ground surface
EMEG = Environmental Media Evaluation Guide
NA = Not Available
ND = Not Detected
ppm = part per million
RI = Remedial Investigation
RMEG = Reference Dose Media Evaluation Guide

Source: Law Engineering and Environmental Services, Inc., 1996.

1 There is no comparison value available for chrysene so the most conservative PAH comparison value for Benzo(a)pyrene is used.
2 The GA EPD has approved a cleanup level of 400 ppm for lead at the Southern and Western Parcels. A site-specific cleanup level for lead has not yet been established for the Northern Parcel, but it is likely to also be 400 ppm (Fonk, 1998).


Table 14. Subsurface Soil Summary Data
Atlanta Gas Light, Augusta, GA
Off-Site

Eighty-six soil samples taken at depths greater than 2 feet bgs.
Contaminant Concentration Range (ppm) Location of Maximum Detected Concentration Soil Comparison Value Pica/Child/Adult (ppm)
PAHs
Benzo(a)pyrene ND - 83 MW-209 0.1 CREG
Chrysene ND - 110 MW-209 0.11 CREG
Fluoranthene ND - 290 MW-209 80/2,000/30,000 RMEG
Naphthalene ND - 490 MW-209 40/1,000/10,000 EMEG
(Intermediate)
Pyrene ND - 340 MW-209 60/2,000/20,000 RMEG
Inorganic compounds
Arsenic ND - 115 MW-208 0.6/20/200 EMEG (Chronic)
Chromium ND - 23.9 HA-209 10/300/4,000 RMEG
Lead ND - 4,900 MW-208 75 GA HSRA2

bgs = below ground surface
MW = Monitoring Well
CREG = Cancer Risk Evaluation Guide
ND = Not Detected
EMEG = Environmental Media Evaluation Guide
ppm = parts per million
RMEG = Reference Dose Media Evaluation Guide

Source: Law Engineering and Environmental Services, Inc., 1996.

1 No comparison value is available for chrysene so the most conservative PAH comparison value for benzo(a)pyrene is used.
2 The GA EPD has approved a cleanup level of 400 ppm for lead at the Southern and Western Parcels. A site-specific cleanup level for lead has not yet been established for the Northern Parcel, but it is likely to also be 400 ppm (Fonk, 1998).



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