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GEOMATRIX <br /> Soil cuttings were stored on-site in labeled 55-gallon steel drums pending proper disposal by <br /> ChevronTexaco. Following sampling, cement grout was placed in the boreholes from the <br /> bottom to the ground surface with a tremie pipe. Grouting was performed after notifying a <br /> SJC-PHS inspector. <br /> 4.2 MONITORING WELL SAMPLING <br /> On-site monitoring wells MW-2 and MW-3 were sampled on August 7, 2003. Prior to sam- <br /> pling the wells, water levels were measured and the presence of separate-phase petroleum was <br /> evaluated. A sheen was noted in the water purged from well MW-2 and a groundwater sample <br /> was not collected at MW-2. <br /> On-site well MW-3 was sampled on August 7, 2003 by a Geomatrix field technician after a <br /> minimum of four casing volumes of water had been removed from the well using a clean dis- <br /> posable bailer. Water-quality parameters measured and recorded during purging included pH, <br /> specific electrical conductance, turbidity, and temperature. The clarity of the water also was <br /> observed. After water-quality parameters stabilized(a minimum of three consecutive readings <br /> with values within 10 percent for each parameter), groundwater samples were collected using a <br /> new polyethylene disposable bailer. <br /> The groundwater sample was collected in accordance with Geomatrix protocols and decanted <br /> into acidified 40-milliliter volatile organic analysis (VOA) vials and 1-liter amber bottles pro- <br /> vided by the laboratory. Sample containers were labeled, sealed in plastic bags, and placed <br /> immediately in an ice-cooled chest for subsequent delivery to F&B under Geomatrix chain-of- <br /> custody procedures. <br /> Well purging water and cleaning rinsate were placed in steel 55-gallon drums, identified with <br /> pending analysis labels, and temporarily stored at the site pending future off-site disposal by <br /> ChevronTexaco. <br /> 4.3 ANALYTICAL METHODS <br /> Soil samples were analyzed for TPH quantified as crude oil (TPHc; C10-C36 carbon range) <br /> using EPA Method 8015 Modified; BTEX using EPA Method 8021 or EPA Method 826013; <br /> and polynuclear aromatic hydrocarbons (PAHs)using EPA Method 8270 SIM. <br /> Groundwater samples were analyzed for TPHg (C6 to C12 carbon range) and TPHd(CIo to C25 <br /> carbon range)using EPA Method 8015 Modified; BTEX using EPA Method 8021 or 8260B, <br /> I:\Doc_Safe\6000s\6447.001\OffSite Rpt\US Can SoilGW Rpt 2003.doc 7 <br />