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WIC'Environmentalonsultants, Inc. <br /> �. Sampling Protocol <br /> .�t Page: 3 <br /> The samples will be chilled according to the San Joaquin County <br /> Health Department protocol immediately, for delivery to the laboratory <br /> and will not opened by anyone other than laboratory personnel. Chain <br /> of Custody records will be maintained at all times . <br /> Soil Sampling <br /> _ All soil sampling equipment will be thoroughly steam-cleaned before <br /> and between sampling to prevent cross contamination. Relatively <br /> ' undisturbed soil samples will be taken at intervals of not more than 5 <br /> feet in the soil borings and the monitoring well if it is constructed..The <br /> only proposed soil samples in the soil vapor wells will be at the <br /> termination of the boring.This should be sufficient as sampling <br /> intervals to evaluate the subsurface materials. <br /> The soil samples will be taken using a California Modified Split Spoon <br /> sampler with brass liners. The sampler will be driven by a 140 pound <br /> 6 <br /> hammer repeatedly falling 30 inches. The blow counts necessary to <br /> drive the sampler will be recorded for each 6-inch interval to help <br /> evaluate the consistencies of the materials. <br /> The soil samples will not have head space and will be immediately <br /> sealed in their liners using aluminum foil covers and plastic caps. The <br /> remaining samples will be removed from their liners and used as an <br /> aide to the on-site geologist in logging the material at that depth. <br /> ' Soil samples collected for analysis will be analyzed using EPA method <br /> P y <br /> 8015 modified for total petroleum hydrocarbons, EPA method 8020 for <br /> BTX&E compounds.The minimum detection limits used for each <br /> ' <br /> analyte is .005 mg/kg for BTX&E 5.0 mg/kg for gasoline and diesel <br /> and kerosene, and 50.0 mg/kg for motor oil. The state certified <br /> F laboratory analyzing the soil samples will be Geo Monitor <br /> Laboratories, Inc. <br /> rim _ <br /> Ground Water Sampling <br /> All sampling equipment including'the pump, bailer, and cables, used a <br /> by sampling personnel; will be disassembled, and steam-cleaned prior <br />