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AGE-NC-07-1517 <br /> 17 March 2008 <br /> Page 6 of 7 <br /> • Utilizing the STLC WET extraction by USEPA method 6010B, lead was reported at <br /> concentrations ranging from 0.26 mg/L(SES2)to 7.1 mg/L (ABC-1). <br /> • Utilizing the STLC WET extraction by USEPA method 6010b, chromium was reported at <br /> concentrations of 0.45 mg/L and 0.64 mg/L in samples BNEWSS and BNEWSN, <br /> respectively. <br /> No other analytes were reported in the soil samples analyzed.Tables 1 through 6 contains a summary <br /> of soil sample analytical results. The reported analytical lead results from the excavation areas are <br /> depicted on Figures 6 and 7.The laboratory reports(CTEL Laboratory Reports CT214-0712071 and <br /> CT214-0802014),quality assurance and quality control(QA/QC)report and chain-of-custody forms <br /> are included in Appendix C. <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based on the field observations and analytical data AGE summarizes: <br /> • On 06 December 2007 and 01 February 2008, approximately 100 cubic yards of soil was <br /> excavated from the site. <br /> • A total of 98.2 tons of designated-waste(low grade),metals-impacted soil were disposed at <br /> Forward Landfill. <br /> • A total of 37.4 tons of hazardous-waste soil were disposed at Kettlemen Hills Facility. <br /> Based on the analytical data AGE concludes: <br /> • Lead levels in soil remaining at the site are below the California Environmental Protection <br /> Agency(CEPA) Preliminary Remediation Goals (PRGs) of 1,000 mg/kg(TTLC) <br /> • Lead levels in soil remaining at the site are below the California Environmental Protection <br /> Agency(CEPA)Preliminary Remediation Goals(PRGs) of 5 mg/L(STLC). <br /> 5.0. RECOMMENDATIONS <br /> AGE recommends: <br /> • No further excavation or sampling. <br /> Advanced GeoEnvironmental,Inc. <br />