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1480 <br /> ATTACHMENT A <br /> FIELD AND LABORATORY PROCEDURES <br /> Health and Safety <br /> Prior to performing field work at the site, SECOR will prepare a Site-Specific Health and <br /> Safety Plan required by the Occupational Health and Safety Administration(OSHA) <br /> Standard"Hazardous Waste Operations and Emergency Response" guidelines (29 CFR <br /> 1910.120) and by California Occupational Health and Safety Administration(Cal-OSHA) <br /> "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, Section <br /> 5192). The Site-Specific Health and Safety Plan will be reviewed by field staff and <br /> contractors before beginning field operations at the site. <br /> Exploratory Drilling and Sampling <br /> The soil borings will be drilled to a depth of approximately 75 feet below ground surface <br /> (bgs). The borings will be drilled using 8-inch hollow-stem auger drilling equipment and <br /> logged by a SECOR representative using the Unified Soil Classification System and standard <br /> geologic techniques under the direction of a registered geologist. Soil samples for logging <br /> will be collected at 5-foot depth intervals using a California-modified split-spoon sampler. <br /> The sampler will be driven a maximum of 18 inches using a 140-pound hammer with a <br /> 30-inch drop. Soil samples for chemical analysis will be retained in brass liners, capped with <br /> Teflon squares and plastic end caps, and sealed in clean zip-lock bags. Grab groundwater <br /> samples will be collected using a disposable bailer. Groundwater samples will be placed in <br /> 40 milliliter hydrochloric acid preserved VOAs. Soil and groundwater samples will be <br /> placed on ice for transport to the laboratory accompanied by chain-of-custody docu- <br /> mentation. Down-hole drilling and sampling equipment will be steam-cleaned prior to and <br /> following the completion of the soil boring. Down-hole sampling equipment will be washed <br /> in a tri-sodium phosphate or alconox solution between samples. The borings will be <br /> backfilled with neat cement and finished to grade with concrete. <br />