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Work Plan for Additional Assessment 2 <br /> Barbara Drake 26485 North Thornton Rd.,Thornton,CA July 26,1995 <br /> TASK 1: SITE-SPECIFIC HEALTH AND SAFETYIPERMITTING <br /> A site-specific Health and Safety Plan was prepared by Groundwater Technology prior to the February <br /> 1995 assessment as required by the Occupational Safety and Health Administration (OSHA)Standard <br /> "Hazardous Waste Operations and Emergency Response"guidelines (29 CFR 1910.120). The <br /> document will be reviewed and signed by all Groundwater Technology personnel and subcontractors <br /> performing work at the site. As requested, a copy of this document has been filed with the San <br /> Joaquin County Public Health Services-Environmental Health Division (SJCPHS-EHD). <br /> Permits for well installation will be obtained from the SJCPHS-EHD. Encroachment permits for <br /> the installation of MW-5 located in the County right-of-way will be obtained from the San Joaquin <br /> County Department of Public Works. Right-of-entry agreements will be obtained from British <br /> Petro leu mlproperty owner for access to the proposed location of MW-4. <br /> TASK 2: SOIL BORINGISOIL SAMPLING <br /> Groundwater Technology will drill three soil borings at the location shown on Figure 2 using a <br /> truck-mounted drill rig equipped with 8-inch-diameter hollow-sterni augers. The borings will be drilled to <br /> approximately 20 feet below ground surface (BGS)to accommodate groundwater monitoring well <br /> installation. SJCPHS-EHD personnel will be notified 48 hours prior to drilling for inspection purposes. <br /> Soil samples will be collected from the soil boring at 5-foot intervals beginning at 5 feet BGS using a <br /> split-spoon sampler lined with 2-inch-diameter by 6-inch-long brass sample tubes. The hollow-stem <br /> augers will be steam cleaned before drilling, and sampling equipment will be cleaned between each <br /> sampling interval. Each soil sample will be screened for hydrocarbon vapors using a photoionization <br /> detector(PID). Soils encountered during drilling will be logged using the Unified Soil Classification <br /> System by a Groundwater Technology field geologist,working under the supervision of a California <br /> registered geologist. One sample tube from each sampling interval will be sealed with teflon pads, <br /> capped,taped, labeled, and placed on ice in an insulated container. Based on field observations, <br /> selected soil samples from the borehole will be analyzed by a State-certified analytical laboratory for <br /> benzene,toluene, ethylbenzene and xylenes(BTEX), and total petroleum hydrocarbons-as-gasoline <br /> (TPH-G) by Environmental Protection Agency methods 50301802018015 modified. If possible, selected <br /> soil samples observed by the laboratory with hydrocarbons beyond the typical carbon-range of gasoline <br /> will be quantified against the typical fuel type noted in the chromatogram. <br /> All soil generated through drilling will be placed on and covered with plastic sheeting on site pending <br /> characterization and disposal. Water generated by steam cleaning will be contained in a steam-clean <br /> trailer and temporarily stored on site in Department of Transportation (DOT)-approved 55-gallon <br /> drums. <br /> 0053030,WKP <br /> ❑®GROUNDWATER <br /> ❑❑ T HNOLOGY <br />