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Work Plan For A Limited Subsurface Investigation-Chevron Service Station #9-1848 <br /> June 26, 1997 <br /> Task 1. Pre-meld Activities <br /> GR will prepare a site safety plan and obtain the necessary soil bonng permits from <br /> the SJCPHS Underground Service Alert (USA) will be notified 48 hours in <br /> advance of the scheduled work A private line locator will be contracted to locate <br /> subsurface utilities <br /> Task 2. Soil Borings <br /> GR will advance four exploratory soil borings using a GeoProbe® or similar direct- <br /> push technology at the locations shown on Figure 2 Each boring will be hand- <br /> augered to 5 feet bgs to clear subsurface utilities. Drilling will be performed by a <br /> California-licensed well driller A GR geologist will monitor the drilling activities <br /> and prepare a log of each boring The exploratory soil bonngs will be advanced to <br /> approximately 15 feet bgs Soil samples for description and possible chemical <br /> analysis will be obtained from each boring at five-foot intervals, as a minimum <br /> Sample handling procedures are described in Appendix A Although the actual <br /> number of samples submitted for chemical analysis will depend on site conditions <br /> and field screening data, we anticipate a minimum of one soil sample collected from <br /> above groundwater in each boring will be submitted for chemical analysis as <br /> described in Task 6 <br /> Soil from each sampled interval will be screened in the field for the presence of <br /> volatile organic compounds using a photoionization detector (PID) These data will <br /> be collected for reconnaissance purposes only, and will not be used as verification <br /> of the presence or absence of petroleum hydrocarbons Screening data will be <br /> recorded on the boring logs <br /> The GeoProbeP does not generate drill cuttings However, cuttings will be <br /> generated during the hand-clearing of each bonng. Upon completion, each boring <br /> will be backfilled to S feet bgs with neat cement Cuttings generated during hand- <br /> augenng will be placed in the upper five feet of the bonng and compacted The <br /> boring will be completed at the surface with concrete Cleaning nnsate waste water <br /> will be transported by Integrated Wastestream Management (IWM) to McKittnck <br /> Waste Management in McK-ittnck, California <br /> Task 3. Laboratory Analyses <br /> Soil and groundwater samples will be submitted for chemical analysis by a <br /> California state-certified Hazardous Material Testing Laboratory Selected soil <br /> 639201-2 3 <br />