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Well Instatlation Report 4 <br /> 7-Eleven Inc.,Store#14117, 2725 Country Club Boulevard,Stockton,CA August 12, 1999 <br /> 3.0 SOIL ASSESSMENT WORK <br /> ' 3.1 Permitting/Site-Specific Health and Safety Plan <br /> Permits for the installation of the four groundwater monitoring wells were applied for and obtained from <br /> the SJCPHS. Following a complete review of site conditions, IT Corporation revised the existing <br /> ' site-specific Health and Safety Plan as required by the Occupational Safety and Health Administration <br /> Standard Hazardous Waste Operations and Emergency Response guidelines (29 Code of Federal <br /> Regulations 1910.120). The document was reviewed and signed by all IT Corporation personnel and <br /> ' subcontractors prior to commencement of work at the site. <br /> ' 3.2 Soil Borings <br /> ' On May 13 and 14, 1999, IT Corporation supervised the drilling of four soil borings to a depth of 25 to <br /> 51 feet BGS utilizing a truck-mounted drill rig equipped with 8-inch outside-diameter(O.D.) hollow-stem <br /> augers. All drilling equipment was steam cleaned prior to drilling each boring, and sampling equipment <br /> was washed in an Alconoxe (detergent) solution and rinsed with water between sampling intervals. All <br /> soil and rinse water generated during the drilling was placed in labeled Department of Transportation <br /> ' (DOT)-approved 55-gallon drums and left on the site pending transportation and disposal. <br /> ' 3.3 Soil Sample Collection <br /> Soil samples were collected from each borehole at 5-foot depth intervals from 5 feet BGS to total <br /> depth. Samples were collected using a 2-inch O.D. California split-spoon sampler, lined with three <br /> 1.5-inch-diameter by 6-inch-long brass tubes. The sampler was driven 18 inches ahead of the augers <br /> at each sample point. Soil samples were field screened for hydrocarbon vapors using a <br /> photo-ionization detector. Soil was logged using the Unified Soil Classification System by a IT <br /> ' Corporation field geologist working under the supervision of a California registered geologist <br /> (Appendix A). One sample tube from each sampling interval was sealed, labeled, and placed on ice <br /> in an insulated container for transport under chain-of-custody to state-certified Core Laboratories in <br /> 1 Anaheim, California. Two samples, MW-2-40' and MW-45', were sent to Acculabs, Inc. in Davis, <br /> California for rush analysis. <br /> 1 <br /> 14111we1!rpt <br /> a <br /> s <br />