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At the CPT-1 location, Gregg Drilling advanced a pair of borings. In the first of these borings, Gregg Drilling used the CPT system to record tip resistance, sleeve friction, and dynamic pore pressure to a total depth of 105 feet. Gregg Drilling recorded a pore pressure dissipation test at approximately 99 feet bgs, when a suspected porous groundwater-bearing zone was encountered during drilling. The CPT plots, pore pressure dissipation plots, and interpretation output are included in Gregg Drilling's report(Appendix E). Gregg Drilling advanced the second soil boring at'CTA to collect depth-discrete soil and groundwater samples from below the groundwater table. According to the approved work plan scope of work, Gregg Drilling collected a soil sample from a depth of approximately 65 feet bgs using push-driven soil sampling methodology. Based on the CPT and pore pressure dissipation data, Gregg Drilling collected a groundwater sample from a depth of approximately 104 feet bgs using a Hydropuncho and a decontaminated stainless steel bailer. Ramage Environmental properly contained and packaged the soil and groundwater samples, and transported them in an iced cooler with chain-of-custody documentation to Excelchem for analysis. Excelchern analyzed both samples for TPH-asjet fuel, TPH-as-gasoline and BTEX by EPA Method 8021 B/8015M, and for MTBE, DIPE, ETBE, TAME, TBA, 1,2-DCA, and EDB by EPA Method 8260B. Following sampling, Gregg sealed the boreholes with cement grout, placed by the trernie method. 2.4 Waste Storage and Disposal All waste soil generated during drilling was contained in 20, 55-gallon drums. During the drilling activities ending on June 1, 2007, Ramage Environmental collected representative soil samples from each of the five well borings to characterize the waste soil. The soil samples were collected into stainless steel sample sleeves and transported under chain of-custody documentation to Excelchem. Excelchem combined the five samples into one, and analyzed the composite soil sample for -a jet fuel, TPH-as-gasoline and BTEX by EPA Method 8021 B/8015M, and for total lead by EPA Method 6010B. The composite soil sample analytical results indicated that none of the petroleum hydrocarbons were detected at concentrations above laboratory reporting limits, and that the concentration of total lead was below hazardous waste limits. On June 27, and 29, 2007, based on the composite soil sample analytical results, Doulos Environmental transported the 20 drums of soil as non- hazardous waste to Sacramento County Kiefer Landfill for disposal. A copy of the landfill receipts are included in Appendix F, and the laboratory report is included in Appendix G. 9