BANNER WESTERN DISPOSAL SERVICE
JOLIET, WILL COUNTY, ILLINOIS
No surface soil samples were collected during the March 29, 1995, FSIP sampling, and the sitenow has a clay cap over the buried waste. People are not likely to be exposured to subsurfacecontamination buried more than 2 feet deep beneath a clay cap.
The ARCS V contractor field team collected 8 sediment samples 0-6 inches deep from on-siteareas, the unnamed stream, and the I&M Canal. Split samples were provided to representativesof the BWDS site. On-site sample locations are presented in Attachment 3, and off-site samplelocations in Attachment 4. Table 3 provides a summary of sample locations and descriptions.
|Appearance||Location and sampling purpose|
0 - 6
|Sand and gravel with some silt||The unnamed stream 10 feet south of Mound Road. To establish background concentrations.|
0 - 6
|Brown silt with sand and gravel||The wetland area near the southeastern site corner. |
To determine contaminants in the landfill.
0 - 6
|Black silt with gravel||Leachate stream flowing into the leachate pond in the southwestern site corner. To determine what may be migrating on-site contaminants.|
0 - 6
|Black silt with gravel||The 2nd leachate stream flowing along the western side of the site. To determine what may be migrating on-site contaminants.|
0 - 6
|Gray to brown silt with sand and gravel||The unnamed stream, where the leachate pond enters the unnamed stream. To determine what may be migrating on-site contaminants.|
0 - 6
|Black silt||The I&M Canal approximately 600 feet upstream of its confluence with the unnamed stream. To determine if other potential sources exist upstream along the I&M Canal.|
0 - 6
|Silt||The I&M Canal approximately 50 feet downstream of its confluence with the unnamed stream. To determine what may be migrating from the site into the I&M Canal.|
0 - 6
|Black/brown silt with some sand and gravel||The unnamed stream approximately 600 feet downstream of S5. To determine other potential sources along the unnamed stream.|
IDPH staff obtained the Quality Assurance/Quality Control (QA/QC) summary from USEPA. The summary states that field data and sampling quality during the site assessment weresatisfactory. No analytical problems were noted in the QA/QC summary. Aluminum levels in allthe samples, phenanthrene in S7 and S8, and benzo(a)pyrene in S5 and S8 represent estimatedvalues because they exceed the upper range of laboratory quantification.
The ARC V contaminant data were compared with appropriate comparison values to selectcontaminants that might pose a threat to public health if someone is exposed to thosecontaminants. The levels of metals were compared with IEPA mean concentrations fromurbanized areas expected to represent naturally occurring soil background in Illinois (2). Chemicals exceeding comparison values and those for which no comparison was available wereselected for futher evaluation for both non-carcinogenic and carcinogenic health effects. Theselected contaminants, their concentrations on-site and off-site, and comparison values aredepicted in Table 4. A detailed discussion of each of the comparison values used is found in Attachment 5.
| Contaminants |
|S1||S 2||S 3||S 4||S 5||S 6||S 7||S 8|
|9.8||2.5*||4.3*||40/ EMEG |
|136||34.5||29.7||300/ RMEG |
- = not analyzed
mg/kg = milligrams of chemical per kilogram of soil = parts per million (ppm)
║Comparison values are based on assumptions of the exposure of a child weighing 10 kg.
* italic = contaminant concentrations less than comparison value
┬╣ Agency for Toxic Substances and Disease Registry: "Toxicological Profile for Polycyclic Aromatic Hydrocarbons." August 1995.
┬▓ Illinois Environmental Protection Agency: "A Summary of Selected Background Conditions for Inorganics in Soil" (Within Metropolitan Statistical Areas). August 1994.
The sediment data indicate that contaminant levels are low in most locations; however, a fewareas are found where contaminant levels exceed comparison values. If we assume that an adultor child frequents the locations where the highest levels of contaminants are found every day, theadults would have to ingest 100 mg of this contaminated sediment per day (or 200 mg of soil perday for children) for at least 15 years before experiencing a small increased risk of developingcancer. A person is not likely to be exposed to this amount of contaminated sediment every dayfor 15 years. Likewise, non-carcenogenic adverse health effects are expected as a result ofoccasional exposure.
Although evidence exists that suggest people are trespassing, we have no surface soil nor surfacewater to evaluate possible exposure to contaminants in those media. To date, no site-relatedcontamination has been found in private well water; however, data are limited.