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HEALTH CONSULTATION

FORMER RALLY'S RESTAURANT AND BRIARCLIFF STATION
ATLANTA, DEKALB COUNTY, GEORGIA


TABLE 1: SOIL VOLATILE ORGANIC SURVEY ANALYTICAL SUMMARY*
BRIARCLIFF STATION SITE

Sample Identification/
Sample Depth
Constituents Detected Using EPA Analytical Method 8240 ppb
Tetrachloroethene
Detection Limit - 5 ppb)
Acetone
(Detection Limit = 50 ppb)
HA-01/20" <5 <50
HA-01/78" <5 <50
HA-02/9" 29 <50
HA-03/23" 6 <50
HA-03/27" 14 <50
HA-04/12" 41 <50
HA-04/76" <5 <50
HA-06/120" <5 <50
HA-07/24" 6000J <250**
HA-08/46" 2630J <250
SB-01/18-20" <5 <50
Field Blank <5 111
Equipment Blank <5 116

ppb: parts per billion
HA: Sample taken with hand auger
J: Estimated concentration due to multiple dilution
SB: Sample taken from hollow stream auger boring
* Source: Professional Service Industries, Inc., Contamination Assessment, 11/94.
** Detection limit increased due to multiple dilution


TABLE 2: SOIL ANALYTICAL SUMMARY*
BRIARCLIFF STATION SITE

LABORATORY SCREENING RESULTS for the AUGUST 23, 1994 SAMPLING EVENT

Sample Identification

Tetrachloroethene ug/L

1

17

2

109

3 11
4 154
5 120
6 99
7 137
8 72
9 285
10 19,937

ug/L: micrograms per liter
* Source: Professional Service Industries, Inc., Contamination Assessment, 11/94.


TABLE 3. GROUNDWATER ANALYTICAL SUMMARY
*

 

Sample Identification

 

Former Rally's Restaurant

Briarcliff Station

School Board Property

Contaminant (ppm) MW-01 MW-02 MW-03 MW-04 MW-05 MW-06 MW-06D** MW-07 MW-015 MW-17 MW-18 MW-19
Tetrachloroethane nd 0.153 0.499 0.010 nd 0.019 0.017 0.054 0.013 nd nd nd
Lead 0.107 nd nd nd 0.075 nd nd nd nd 0.010 nd nd
1,2-dichloroethane 0.056 nd nd nd 1.15 nd nd nd nd nd nd nd
Total BTEX 3.149 nd nd nd 21.200 0.032 0.046 nd nd nd 4.099 0.178

ppm: parts per million
MW: Monitoring Well
BTEX: volatile petroleum constituents: Benzene, Toluene, Ethylbenzene, and Xylene
nd: not detected
* Source: Professional Service Industries, Inc., Contamination assessment, 11/94.
** Duplicate sample collected


TABLE 4. MAXIMUM SOIL CONCENTRATIONS AND SOIL COMPARISON VALUES

Contaminant Maximum
Concentration
(ppm)
Comparison Values* Estimated Dose
and MRL**
(mg/kg/day)
Concentration
(ppm)
Reference
Tetrachloroethene

6.0

Pica Child: 20.0
Child: 500.0
Adult: 7000.0
10.0

Intermediate
RMEG
"
"
CREG

Pica Child: 0.00012
Child: 0.0030
Adult: 0.0000043
MRL=0.05

ppm: parts per million
mg/kg: milligrams per kilogram
EMEG: Environmental Media Evaluation Guide
RMEG: Reference Dose Media Evaluation Guide
CREG: Cancer Risk Evaluation Guide (1x10-6 excess cancer risk)
MRL: Minimal Risk Level
NA: Not Analyzed
* Source: ATSDR, Soil Comparison Values
** Source: ATSDR, Health Guidelines Comparison Values


APPENDIX A

Comparison Values

Comparison values are contaminant concentrations that are found in specific media and that are used to select contaminants for further evaluation. The values are derived from dose estimates at which health effects are not expected to be observed. Comparison values are listed and described below.

Cancer Risk Evaluation Guides (CREGs) are estimated contaminant concentrations that would be expected to cause no more than one excess cancer in one million (1 x 10') persons exposed over a lifetime. CREGs are calculated from EPAs cancer slope factors, which indicate the relative potency of a carcinogenic chemical.

Environmental Media Evaluation Guides (EMEGs) are based on ATSDR minimal risk levels and factor in body weight and ingestion rates. Reference Dose Media Evaluation Guides are the same as EMEGs only they are based on EPA reference doses (RfDs).

A Minimal Risk Level (MRL) is an estimate of daily human exposure to a chemical (in mg/kg/day) that is likely to be without an appreciable risk of deleterious effects (noncarcinogenic) over a specified duration of exposure. MRLs are based on human and animal studies and are reported for acute (14 days), intermediate (15-364 days), and chronic (365 days) exposures. MRLs are published in ATSDR Toxicological Profiles for specific chemicals.


Figure 1. Site Location


Figure 2. Map of Sites and Assessment Area


Figure 3. Site Map



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