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' From each soil boring, groundwater sample was collected a g p d using a Hydropunche Groundwater was raised to the surface using dedicated and disposable polyethylene tubing, a check valve, and manual oscillation Following the groundwater sampling, each of the soil borings was sealed under EHD inspection, using a neat cement grout and a tremae pipe ' Accordingto the work lar and in consultation with the EHD inspector,p p tar, each of the groundwater samples, and the soil samples collected at 25 feet bgs (i e , within the capillary fringe interval) and at the bottom of each soil boring were submitted for laboratory analysis These samples were properly contained, and transported in an iced cooler with chain-of-custody documentation to Kiff Analytical, LLC (Kiff), a state of California certified hazardous waste testing laboratory (Certification#2236) Kiff analyzed all of the soil and groundwater samples for TPH-as-kerosene by EPA Method 8015M, and for TPH-as-gasoline, BTEX, MTBE, di-isopropyl ether(DIPS), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), tertiary butanol (TBA), methanol, ethanol, 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB) by EPA Method 8260B 23 Groundwater Monitoring, Sampling and Analysis r On March 24, 2004, to comply with quarterly groundwater monitoring requirements, Ramage Environmental monitored and sampled the four existing groundwater monitoring wells Depth-to-groundwater was measured to within 0 01-foot usinga water level indicator Following g groundwater level measurements, the wells were purged and sampled The wells were purged ' with a pump and dedicated disposable tubing until at least three well casing volumes had been removed and/or after groundwater temperature, pH and electrical conductivity values had stabilized Groundwater was sampled from the wells using disposable polyethylene bailers and laboratory-supplied containers The sample information field sheets are included in Appendix B Each sample container was transported in an iced cooler with chain-of-custody documentation to Excelchem Environmental Labs (Excelchem), a state of California-certified hazardous waste testing laboratory (Certification #2119) Excelchem analyzed each of the samples for TPH-as- kerosene, TPH-as-gasoline and BTEX by EPA Method 802018015M, and for MTBE, DIPS, ETBE, TAME, TBA, and 1,2-DCA by EPA Method 82608 Testing for TPH-as-diesel and TPH- i,' as-motor oil was discontinued, since these compounds have not been detected in any of the groundwater samples analyzed over the past four quarters 9 i�