ARCHIVED REPORTS_1988 - Laserfiche WebLink

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Ip KLEINFELDER The majority of the fill onsite contains only about 5 to 10 percent refuse and 90 to 95 percent sand, silty sand, and sandy silt that may have been mixed in when the surface of this land was shaped and reshaped over the years. Based on the interpretation presented in Cross Section A-A', Plate 8, a maximum of about 30 percent of the fill contains more than 10 percent rubbish. This 30 percent of the fill contains 15 to 85 percent rubbish, with the average being approximately 40 percent rubbish. Based on these observed percentages, it appears that less than"25,000 cubic yards of waste is contained at the landfill These results are summarized as follows: Maximum estimated total fill = 120 000Y s3 70 percent of fill (84,000 yds3) contains < 10 percent refuse = 8,400 yds3 refuse 30 percent of fill (36,000 yds3) contains 15 to 85 percent refuse (40 percent average) = 14,400 yds3 refuse Total refuse = 22,800 yds3 4.1.2 ANALYTICAL RESULTS Seven samples were submitted to Chemwest Analytical Laboratories for analysis. These samples, and the requested analyses, are described in Section 3.1. None of the samples analyzed by EPA Method 8240 contained volatile organic compounds at concentrations above the reporting limits. The reporting limits varied from 5 mg/kg to 20 mg/kg, depending on the compound. The laboratory report is included in Appendix B. The six samples analyzed for total petroleum hydrocarbons (TPH) by EPA Method 418.1 contained levels of TPH ranging from 27 mg/kg to 94 mg/kg. The highest concentrations (61, 94, and 46 mg/kg) were detected in samples from the fill. Concentrations of 27, 36, and 32 mg/kg were detected in samples collected from the vadose zone below the fill. These results are summarized in Table 1. The laboratory report is included in Appendix B. These results may indicate the presence of low concentrations of nonvolatile hydrocarbons 137-88-1663 13