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ATTACHMENT B <br /> FIELD AND LABORATORY PROCEDURES <br /> Chevron 9-9840, 4344 Waterloo Road, Stockton, CA <br /> CPT INVESTIGATION <br /> Exploratory Drilling and Soil and Groundwater Sampling <br /> The CPT soil borings were advanced using a direct push cone penetrometer testing <br /> (CPT) ng to log soil stratigraphy Immediately adjacent to each CPT borehole, a second <br /> direct-push borehole was advanced to collect discrete soil and groundwater samples <br /> Soil samples were collected using an Envirocore sampler, or similar technology Soil <br /> samples were retained in plastic sleeves and capped with Teflon squares and plastic end <br /> caps Groundwater samples were collected using a hydropunch, or similar technology, <br /> by lowering a stainless steel or Teflon bailer into accumulated groundwater in the <br /> borehole, then retrieving and transferring the water into laboratory supplied containers <br /> The soil and groundwater sample containers were placed on ice for transport to the <br /> laboratory accompanied by chain-of-custody documentation Down-hole boring and <br /> sampling equipment was steam-cleaned prior to and following the completion of each <br /> soil boring Down-hole sampling equipment was washed in a tri-sodium phosphate or <br /> AlconoxTM solution between samples <br /> Laboratory Procedures <br /> Soil and groundwater samples collected were analyzed for the presence of total <br /> petroleum hydrocarbons quantified as gasoline (TPHg) by EPA Method 8015, benzene, <br /> toluene, ethylbenzene, xylenes (BTEX) and the fuel oxygenates methyl tertiary butyl <br /> ether (MtBE), tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tertiary-butyl <br /> ether (EtBE), tertiary-amyl methyl ether (TAME), ethanol, and methanol by EPA <br /> Method 8260B <br /> Soil Cuttings and Rinsate Water <br /> No soil cuttings were generated during drilling operations Water generated during <br /> steam cleaning and sampling of the borings was hauled offsite by Gregg Drilling for <br /> disposal at an appropnate disposal facility <br /> PROPOSED WELL INSTALLATION ACTIVITIES <br /> Health and Safety <br /> As required by the Occupational Health and Safety Administration (OSHA) Standard <br /> "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910 120), <br /> and by California Occupational Health and Safety Administration (Cal-OSHA) <br /> "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, <br /> Section 5192), SECOR will prepare a Site-Specific Health and Safety Pian prior to the <br />