HEALTH CONSULTATION
HART COUNTY LANDFILL:
PRIVATE WELL CONTAMINATION INVESTIGATION
HARTWELL, HART COUNTY, GEORGIA
Well sampling results for Addie Wells Residence
| Contaminant Name | Sample Results (ppb) | MCL | ATSDR Comparison Value |
| benzene | 0.79 | 5 | 1 (CREG) |
| chlorobenzene | 0.5 | 100 | 200 (chronic RMEG) |
| cis-1,2 dichloroethene | 1.68 | 70 | 3,000 (int. child EMEG) |
| trichloroethylene | 4.8 | 5 | 3 (CREG) |
Table 2 EXPOSURE AND DEMOGRAPHIC STRUCTURE FILE
Total Population Estimates Table
| Pathway Name |
Unknown | Estimated Pop. in Pathway |
Range Minimum |
Range Maximum |
| a. Pot. Pathways On-site |
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| b. Pot. Pathways Off-site |
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| c. Total Pot. On and Off-site |
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| d. Compl. Pathways On-site |
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| e. Compl. Pathways Off-site |
2 | 1 | 3 | |
| f. Total Compl. On and Off-site |
2 | 1 | 3 | |
| g. Pot. and Compl. Pathways On-site |
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| h. Pot. and Compl. Pathways Off-site |
2 | 1 | 3 | |
| I. Total Pot. and Compl. On and Off-site |
2 | 1 | 3 |
EXPOSURE AND DEMOGRAPHIC STRUCTURE FILE - Completed Exposure
Pathway Table - OFF SITE
| Pathway Name: | Source | Medium | Exposure
Point |
Exposure Route | Receptor Population | Time of Exposure | Exposure Activities | Estimated Number Exposed | Chemicals (identify by name or reference to tables in document) |
| Off-site Groundwater | Landfill and/or other source | Groundwater | Drinking water taps | Ingestion | Residents at the Wells home (2) | Past | Drinking of contaminated water through in-home taps. | 2 | Trichloroethylene (Table 1) |
INTERPRETATION OF MINIMAL RISK LEVELS
Where sufficient toxicologic information is available, ATSDR has derived minimal risk levels (MRLs) for inhalation and oral routes of entry at each duration of exposure (acute, intermediate, and chronic). An MRL is an estimate of the daily human exposure to a hazardous substance that is likely to be without appreciable risk of adverse noncancer health effects over a specified duration of exposure. MRLs are based on noncancer health effects only and are not based on a consideration of cancer effects. These MRLs are not meant to support regulatory action, but to acquaint health professionals with exposure levels at which adverse health effects are not expected to occur in humans. They should help physicians and public health officials determine the safety of a community living near a chemical emission, given the concentration of a contaminant in air or the estimated daily dose in water. MRLs are based largely on toxicological studies in animals and on reports of human occupational exposure.
