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bailer or an oil-water interface probe. Each well will be purged of approximately three casing volumes of <br /> water (or to dryness) using a centrifugal pump, gas displacement pump, or bailer. The equipment and �h <br /> purging method used for the sampling event will be noted on the attached field data sheets. During Qr <br /> purging, temperature, pH, and electrical conductivity are monitored in order to document that these��/� d <br /> parameters were stable prior to collecting samples. After purging, groundwater samples will be collected <br /> from each well using a Teflon® bailer, placed into appropriate EPA-approved containers, labeled, logged <br /> onto a chain-of-custody document, and transported on ice to a California state-certified laboratory. <br /> Laboratory Procedures loco <br /> Selected soil samples will be analyzed for the presence of TPHg, BTEX, and MtBE by EPA Me Hod 82�6B 4162 <br /> (Single Run). Four samples will be collected from the stockpiled soil and composited at the laboratory for <br /> analysis of TPHg, BTEX, and MtBE by EPA Method 82608 (Single Run), and total lead by EPA Method <br /> 60108. <br /> Groundwater samples will be collected by SECOR following well development, and will be analyzed for the <br /> presence of TPHg, BTEX, fuel oxygenates (MtBE, TAME, DIPE, EtBE, TBA, and ethanol), 1,2-DCA, and <br /> I. EDB using EPA Method 8260B (Single Run). <br /> Soil Cuttings and Purge Water <br /> Soil cuttings generated during the installation of wells OS-1 through OS-9, MW-11, and MW-12 will be <br /> stockpiled on-site, pending characterization and disposal. The stockpiled soil will be removed from the <br /> site by a ConocoPhillips-certified waste disposal contractor and transported to a ConocoPhillips'-approved <br /> disposal facility. <br /> 1 <br /> Rinsate/purge water generated during the installation, development, and sampling of the wells will either )S <br /> be removed from the site by SECOR and transported to an ARCO waste-water holding tank in West 1 (�S <br /> Sacramento for future disposal coordinated by URS Corporation, r by a ConocoPhillips'-certified waste d� <br /> hauler to a ConocoPhillips-approved waste disposal facility. <br /> Y+✓_ YS <br /> 2 Ste, <br /> j jct <br /> pl <br /> n. <br /> ii <br /> ( o <br /> I <br /> I I <br /> i <br /> (:\ConocoPhillips\Tosco Marketing\11193\Reports\Revised IRAP.&WP.doc <br />