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fin) <br /> Additional Assessment Report 3 <br /> Chevron USA Products Company,2405 Airport Way Stockton, California September 23 1994 <br /> 30 ADDITIONAL ASSESSMENT WORK <br /> 31 Site-specific Health and Safety plan/Background Review/Permitting <br /> Groundwater Technology revised the existing site-specific Health and Safety Plan required by the <br /> Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and <br /> Emergency Response" guidelines (29 CFR 1910 120) The Health and-Safety Plan was revised by <br /> Groundwater Technology personnel following a complete review of site conditions The document was <br /> reviewed by all Groundwater Technology personnel and subcontractors prior to performing work at the <br /> site <br /> Groundwater Technology conducted a technical review of all pertinent information prior to proceeding <br /> with assessment work at the site All applicable permits pertaining to groundwater monitoring well <br /> installation were obtained (Appendix A) <br /> 32 Soil Boring <br /> • On May 16, 1994, Groundwater Technology supervised the drilling of one 65-foot soil boring to <br /> accommodate the installation of groundwater monitoring well MW-5 The boring was drilled using a <br /> truck-mounted drill rig equipped with 8-inch outside-diameter hollow-stem augers All drilling equipment <br /> was steam cleaned prior to drilling, and sampling equipment was washed between sampling Intervals <br /> All rinse water generated during steam cleaning was temporarily contained In Department of <br /> Transportation (DOT)-approved 55-gallon drums pending transport to the Chevron refinery in Richmond, <br /> California for recycling Soil cuttings from the boring were placed on and covered with plastic sheeting <br /> on site pending characterization and removal On June 8, 1994, the soil cuttings were transported to <br /> BFI landfill, In Livermore, California, by Integrated Wastestream Management(IWM),a Chevron-approved <br /> and State-certified waste hauler <br /> 33 Soil Sampling <br /> During drilling, sod samples were collected at 5-foot Intervals, beginning at 5 feet below ground surface <br /> (BGS) to the bottom of the boring Samples were collected using a 2 5-Inch outside-diameter split- <br /> spoon sampler, lined with three 2-Inch-diameter by 6-inch-long brass sample tubes The sampler was <br /> driven 18 Inches ahead of the augers at each sample point Sod samples were field screened for <br /> hydrocarbon vapors using a photo-Ionization detector (PID) One sample from each 5-foot Interval was <br /> 5038SUM qM <br /> GROUNDWATER <br /> TECHNOLOGY <br />