PETITIONED PUBLIC HEALTH ASSESSMENT
ATLANTA GAS LIGHT COMPANY
AUGUSTA, RICHMOND COUNTY, GEORGIA
Figure A-3. Augusta Canal System Circa 1979
Figure A-4. Third Level Canal Study Area
| 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
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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