ARCHIVED REPORTS XR0010525 - Laserfiche WebLink

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1.0 INTRODUCTION This report describes field and office activities that were performed during the fourth quarter of 2002 on behalf of Mr and Mrs James Fisk, owners of the property located at 8125 S El Dorado Street in French Camp, California(Figure 1) Mr and Mrs Fisk operate J&L,Market and Service at this address, and have been designated by the State Water Resources Control Board UST Cleanup Fund as the Responsible Party (RP) for petroleum contamination related to underground fuel tanks at that facility Contamination was discovered during the removal of three single-walled UST's and related piping in November 1995, and extensive interim remediation in the form of soil excavation then took place Upgradient Environmental Consultants (Upgradient Environmental) conducted further investigation in November 2001 to determine whether groundwater was impacted by the petroleum release, and submitted a Preliminary Investigation and Evaluation Report (PIER),in December 2001 Because evidence of groundwater contamination was obtained, the lead regulatory agency (the Central Valley Regional Water Quality Control Board [CVRWQCB]) requested the RP to install groundwater monitoring wells and begin quarterly well monitoring The wells were drilled and sampled in June and a quarterly report was submitted in July The wells were placed on a schedule of quarterly monitoring, and this report presents the results for the fourth quarter of 2002 2.0 PROCEDURES Due to poor weather and other commitments, groundwater monitoring could not be scheduled during the fourth quarter of 2002 Monitoring was postponed to January 2, 2003 The wells were opened and the water level was allowed to equilibrate with atmospheric pressure for approximately 15 minutes before the depth to water was measured Each well was then purged of approximately 5 gallons of water, and temperature and electrical conductivity were measured at 2-gallon intervals to confirm that the standing water had been removed and these parameters had stabilized (Appendix A) Water samples were collected by lowering a disposable Teflon® bailer to the water table Three 40-m1 vials were collected from each well and preserved in a cooled ice chest An out-of-service domestic well near the west edge of the property was also sampled, in accordance with a request by the Regional Water Quality Control Board The water samples were shipped to McCampbell Analytical Laboratory in Pacheco, where they were analyzed for Total Purgeable Petroleum Hydrocarbons in the gasoline range (TPH-g), benzene, toluene, ethylbenzene, and xylene (BTEX), and for'five gasoline oxygenates and dichloroethane (1,2-DCA) The sample from the domestic well was also analyzed for Total Extractable Petroleum Hydrocarbons (TPH-diesel) The laboratory report is included in Appendix B, and the results are discussed in section 3 0 2 s