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HEALTH CONSULTATION

DEKALB PEST CONTROL SERVICES, INCORPORATED
AVONDALE ESTATES, DEKALB COUNTY, GEORGIA


FIGURES


Figure 1. Site Location


Figure 2. Sample Locations


Figure 3. Site Map



TABLES

TABLE 1. GDA SOIL ANALYTICAL DATA*

Contaminant Concentration (ppm)
  Sample #1 Sample #2
Chlordane 164.80 79.00
Dieldrin 9.94 3.48
Heptachlor epoxide 5.55 4.18

ppm: parts per millon

* These soil samples were collected on January 16, 1991 by the Georgia Department of Agriculture (GDA) in areas where disposed pesticide containers were discovered. GDA performed the analyses and test methods are unknown.


TABLE 2. EPA SOIL ANALYTICAL DATA*

Contaminant Concentration (ppm)
  Sample Location
  DPC-1 DPC-1D DPC-2 DPC-3 DPC-4 DPC-5 DPC-6
Heptachlor 1.300 1.320 1.280 0.477 0.277 0.121 0.008
Aldrin   0.093          
Heptachlor epoxide 2.420 2.790 2.340 9.270 1.640 1.000  
Endosulfan 1 2.060 2.110 2.140 1.500 1.140   0.004
Dieldrin 0.552 0.626 0.865 1.630 1.190 0.135 0.010
4,4'-DDE 0.151 0.201 0.175        
4,4'-DDD 0.202 0.260 0.242   0.704 0.093  
Endosulfan sulfate 0.179 0.214   0.098   0.075 0.019
4,4'-DDT 0.206 0.276 0.240        
Chlordane 22.400 21.900 29.000 14.800 10.400 10.800 0.133
Methoxychlor     0.141        
Endrin aldehyde     0.409       0.024
Endosulfan II       0.120   0.077  
Endrin         0.207    

ppm: parts per million

D: sample results at 100 dilution, duplicate analysis.

*These soil samples were collected to October 3, 1991 by the U.S. Environmental Protection Agency (EPA) in areas where disposed pesticide containers were discovered. EPA performed the analyses and test methods are unknown.

Blanks indicate that samples were not tested for the parameter.


TABLE 3. ANALYTICAL SUMMARY FOR CHLORDANE*

Sample
Number
Sample
Depth "A"
0"-6"
Sample
Depth "B"
6"-12"
Sample
Depth "C"
12"-24"
D01 1.61 ND ND
D02 3.60 ND 17.2
D03 ND ND ND
D04 ND ND ND
6.25
(duplicate)
D05 19.2 ND 0.872
0.842
(duplicate)
D06 0.897 0.959 ND
ND
D07 ND ND ND
ND
D08 ND ND ND
D09 21.3 6.10 0.197
D010 0.221 23.3 1.60
D011 ND ND ND
DO12 ND ND ND
D013 0.199 ND ND
D014 ND ND ND
D015 ND ND ND
D016 ND ND ND

All results are in parts per million.
ND: Non Detect
*Source: OHM Remediation Services Corp. 12/95


TABLE 4. ANALYTICAL SUMMARY: CONFIRMATION SAMPLES FOR CHLORDANE*


Sample Number Chlordane Results
Sample Depth 0"-6"
DP-01 2.70
DP-02 0.87
DP-03 0.20
DP-04 0.15
DP-05 0.41
DP-06 0.036
DP-07 ND
DP-08 40.00**
DP-09 0.076

All results are in parts per million.

ND: No Detect

*Source: OHM Remediation Services Corp., 12/95
**Confirmation results indicate that the northeast quadrant exceeded Type I Risk Reduction Standards (RRS) for chlordane in soil. An additional volume of soil (15 feet by 15 feet by 1 foot deep) was excavated. Results of a second confirmation sample indicate chlordane levels below Type I RRS for chlordane in soil.


TABLE 6. MAXIMUM CONCENTRATIONS AND COMPARISON VALUES FOR SOIL

Contaminant Maximum
Concentration
(ppm)
Comparison Values* Estimated Dose
and MRL**
(mg/kg/day)
Concentration
(mg/kg)
Reference
Chlordane 164.80 Pica Child: 1.0
Child: 30
Adult: 400
0.5
Chronic EMRG
           "
           "
CREG
Child: 0.003
Adult: 0.0001

MRL=0.0006
Dieldrin 9.94 Pica Child: 0.1
Child: 3
Adult: 40
0.04
Chronic EMRG
           "
           "
CREG
Child: 0.0002
Adult: 0.000007

MRL=0.00005
Heptachlor epoxide 5.55 Pica Child: 0.03
Child: 0.7
Adult: 9.0
0.08
RMEG
      "
      "
CREG
NA

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 (expires 3/98)
**Source: ATSDR, Health Guidelines Comparison Values (expires 3/98)

Table 5a. Population and Housing Units


Table 5b. Population by Race


Table 5c. Population by Hispanic Origin


Table 5d. Population - Adult and Juvenile


Table 5e. Population - Children and Senior Citizens



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 provide guidelines that are used to estimate a dose at which health effects might 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 (1x10') persons exposed over a lifetime. CREGs are calculated from EPA's 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.



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