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' Beacon Station No 641 December 8, 1997 <br /> toqkton- Califomia, Additional Subsurfgce Investigation Re <br /> LABORATORY METHODS AND RESULTS <br /> 1 <br /> Soils les <br />' Soil samples collected from borings B-1 and B-2 were submitted under chain-of-custody <br /> (COC) to West Analytical Laboratory (West), a State-certified laboratory in Davis, <br />` California (Certificate No 1346) Selected soil samples were analyzed for total petroleum <br /> hydrocarbons as gasoline (TPHg), the gasoline constituents benzene, toluene, ethylbenzene, <br /> and xylenes (BTEX), and methyl tertiary-butyl ether (MTBE) by modified Environmental <br /> Protection Agency (EPA) Methods 8015/8020 Soil samples collected from the stockpiled <br />' drill cuttings were analyzed for TPHg, BTEX and MTBE by modified EPA Methods <br /> 8015/8020, and for Total Lead by EPA Method 6010 <br /> Soil samples collected from borings MW-2, MW-3, MW-4, MW-5, VE-5, and VE-7 were <br /> submitted under COC to Kiff Analytical (Kiff), a State-certified laboratory in Davis, <br /> California (Certificate No 2236) Selected soil samples were analyzed for TPHg, BTEX, <br /> and MTBE by modified EPA Methods 8015/8020 in addition, the soil samples with the <br /> highest laboratory detection of TPHg from each boring was analyzed for the oxygenated fuel <br /> additive compounds methanol, ethanol, tertiary butanol, methyl tertiary-butyl ether (MTBE), <br /> di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), and tertiary amyl methyl ether <br /> (TAME) by EPA Method 8260 Soil samples collected from the stockpiled drill cuttings <br />' were analyzed for TPHg, BTEX and MTBE by modified EPA Methods 8015/8020 <br /> tAnalytical results of soil samples submitted from the soil borings and drill cutting spoilpiles <br /> are summarized in Table 1 Laboratory analytical data and COC reports are included in <br /> Appendix F <br /> Groundwater Samples <br /> Groundwater samples were collected on November 14, 1996 and March 18, 1997 from <br /> monitoring well MW-1 by Honzon personnel and submitted to West under COC Requested <br /> 1641-13r <br /> rP 9 HORIZON ENVIRONMENTAL INC <br />