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� i ! <br /> 2.0 FIELD METHODS <br />' 2.1 Soil Borings <br /> The borcholcs will be adv anccd to 10 feet below the top of groundwater, using a <br />' truck-mounted drill rig equipped with 8-inch hollow stem augers The boreholes will <br /> be reamed with 10-inch augers to permit the construction of 4-inch diameter <br /> monitoring wells The augers and sampling equipment will be steam-cleaned prior <br /> to drilling, and in-between borehole Iocations The following drilling protocols will <br /> be obscry cd <br /> • Permits to advance borings and install wells will be obtained from San Joaquin <br /> County Public Health Services, <br /> • Underground ScrN ice Alert will be notified in advance of drilling acts►itics, <br /> • A health and safety plan will be prepared and a safety meeting will be held <br /> with all field contractors before drilling, <br /> • All soil borings will be started with a hand auger for the first 3 feet to avoid <br /> hilling underground utilities with the hollow-stem auger, <br /> • Breathing space will be monitored b} a Health and Safety Officer per the <br /> health and safety plan <br /> • The smallest diamctcr auger w ill be used to accommodate the intended use of <br /> the boring to minimize generation of soil cuttings and exposure to hazardous <br /> conditions and materials <br /> 2.2 Soil Sampling <br /> The borcholcs will be sampled every five feet using a modified California-type <br /> sampler equipped with clean brass tubes Samples will be removed from the sampling <br /> tubes using a clean stainless steel spatula or putty knife that is decontaminated with <br /> alconox soap and deionized water Samples designated for chemical analysis will be <br /> placed in laboratory-provided sample containers and stored in an ice chest The <br /> remaining soil samples will be logged by a state registered field geologist using the <br /> Unified Soils Classification System (USCS) Visual-Manual Procedure ASTM D2488-84 <br /> llydrocarbon vapors will be monitored by the field geologist using a IINu <br /> photoionization detector with a 102 eV lamp or a portable combustible gas meter <br /> (Gastector) Samples will be shipped under chain-of-custody to California Fuel's <br /> subcontract state certified laboratory for chemical analysis <br /> 2.3 Drill Cuttings <br /> Drill cuttings will be stored in DOT approved 55 gallon drums for off-site disposal <br /> California Fuels will test and dispose of this material in accordance with local and <br /> state hazardous waste regulations <br /> 8 <br />