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MEMO. w-_ <br /> 7 <br /> Chevron/W. Benjamin Holt Drive <br /> June 1990 <br /> Cuttings generated during drilling will be placed in steel, <br /> all down- <br /> 55-gallon drums and held on site. Betwe&n boreholes, <br /> hole equipment will be cleaned using a pressure washer. Rinsate <br /> from this decontamination will be placed in 55-gallon steel drums <br /> is <br /> and stockpiled on site. All wastes generated during th <br /> assessment will be disposed of in an appropriate, legal manner <br /> after laboratory analyses have determined if the waste must be <br /> treated as a hazardous material. <br /> Selected soil samples will be laboratory analyzed for the <br /> presence of benzene, toluene, ethylbenzene, and xylenes (BTEX) , <br /> hydrocarbons (TPH)-as-gasoline using <br /> and for total petroleum <br /> tion Agency (EPA) Methods <br /> modi-' ied U.S. Environmental Protec <br /> 5030/8020/8015. At least one soil sample from each borehole will <br /> be analyzed. if field observations and/or PID readings indicate <br /> sible adsorbed hydrocarbons in the encountered soils, <br /> pos <br /> additional sanples may be analyzed. <br /> Soil samples from above and be.iow the water table may be <br /> Such testing c ould include grain <br /> collected for physical testing. <br /> size analyses, permeability, and/or porosity. Data from these <br /> tests could be used to assess the practicality of possible <br /> remediation strategies. <br /> Aaditional information on Groundwater Technology Standard <br /> operating ProcedureG (SOPs) for this, and all phases of field <br /> w rk, is included in Appendix A. <br /> o <br /> GROUNDWATER MONITORING WELL INSTAISiATION <br /> The two boreholas will be completed as groundwater <br /> monitoring wells. Unless otherwise required, wells will be <br /> constructed of 2-inch-diameter, Schedule 40 polyvin.yl chloride <br /> GROUNDWATER <br /> TECHNOLOGY,INC. <br />