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FLUOR DANIEL GTI <br /> As stated in the original work plan, a report summarizing the drilling, sampling, and installation of <br /> groundwater recovery wells, collection of soil samples from the wells, and installation of all associated <br /> piping necessary to connect the recovery wells with existing groundwater extraction system will be <br /> completed. Details of the modified scope of work are described below. <br /> TASK 1: SITE-SPECIFIC HEALTH AND SAFETY PLAN/PERMITTING <br /> A site-specific Health and Safety Plan has been prepared by Fluor Daniel GTi as required by the <br /> Occupational Safety and Health Administration (OSHA) Standard "Hazardous Waste Operations and <br /> Emergency Response"guidelines (29 CFR 1910.120). The document will be reviewed and signed by all <br /> Fluor Daniel GTI personnel and subcontractors performing work at the site. <br /> All necessary permits for drilling and well installation will be obtained from the SJCEHD. <br /> TASK 2: SOIL BORING/SAMPLING <br /> Using a truck-mounted drill rig equipped with 12-inch-diameter hollow-stem augers, Fluor Daniel GTI will <br /> install two soil borings to be converted to groundwater extraction wells in the former tank pit area and near <br /> MWA 0 at the locations shown in Figure 2. The borings will be drilled to approximately 20 feet below <br /> ground surface (BGS). It is anticipated that groundwater will be encountered at approximately 3 to 4 feet <br /> SGS. <br /> Soil samples will be collected from each borehole 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 augers <br /> will be steam cleaned before drilling, and sampling equipment will be cleaned between each sampling <br /> interval. Each soil sample will be screened for hydrocarbon vapors using a photoionization detector(PID). <br /> Soils encountered during drilling will be logged using the Unified Soil Classification System by a Fluor <br /> Daniel GTI field geologist,working under the supervision of a California registered geologist. One sample <br /> tube from each sampling interval will be sealed with teflon sheets, capped,taped, labeled,and placed on <br /> ice in an insulated container. Based on field observations,selected soil samples from the borehole will be <br /> analyzed by a State-certified analytical laboratory for benzene,toluene, ethylbenzene and xylenes (BTEX), <br /> and total petroleum hydrocarbons-as-gasoline (TPH-G) by EPA methods 8020/8015 modified. An <br /> estimated two soil samples from each boring will be analyzed. <br /> All soil generated through drilling will be stockpiled on site and covered with plastic sheeting or placed in <br /> drums pending characterization and disposal. Water generated by steam cleaning will be contained and <br /> temporarily stored on site in Department of Transportation (DOT)-approved 55-gallon drums pending <br /> treatment through the existing groundwater remediation system. <br /> 0231-02 Sm,-51 <br /> Addendum to Work Plan for Groundwater Extraction Well Installation July 5,1996 <br /> The Southland Corporation,455 Grant line Road,Tracy,CA 2 <br />