ARCHIVED REPORTS XR0001403 - Laserfiche WebLink

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I was operated in 1949 as Prattsman G E Gasoline Station This same property 16 was operated in 1955 as Point's Service Station, in 1970 as Al's Richfield Service, in 1974 as Tradewind Tires, and in 1975 as Washington Garage Apparently, the glass replacement business started in 1986 Stockton City Directory information is included in Appendix C of this report The County apparently does not have historic file information indicating whether this property had ever experienced a fuel release because their records do not extend that far back 1.2 Previous UST-Related Work A 1,000-gallon gasoline UST located beneath the sidewalk along the eastern portion of the Site, an associated fuel dispenser located within the Site building, and a portion of product piping from the UST to the building were removed in December 1990 The remaining product piping, from the edge of the building to the former dispenser, was properly abandoned on April 17, 1998 On April 16, 1998, PSC drove two 1-inch diameter Geoprobe probeholes (PH-1 and PH-2) beneath the former UST to collect soil and groundwater samples for laboratory analysis Analytical results, summarized in PSC's June 2, 1998 Preliminary Subsurface Site Investigation Results and Product Piping Abandonment Completion report, indicated that benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds impact subsurface soil and groundwater Soil and groundwater samples collected at that time did not contain detectable oxygenate compounds In July 1999, Ground Zero Analysis, Inc (GZA) of Escalon, California, performed a subsequent subsurface investigation GZA drilled three soil borings, completed them as groundwater monitoring wells (MW-1 through MW-3), and collected soil and groundwater samples for laboratory analysis GZA's investigation, summarized in their July 28, 1999 Groundwater Monitoring Well Installation Report, detected BTEX and total petroleum hydrocarbon as gasoline (TPHg) impact in soil and groundwater samples collected at the MW-2 location (see Figure 2) Samples collected from MW-1 and MW-3, placed in hydraulically upgradtent positions relative to the former UST, did not contain detectable petroleum hydrocarbons The County directed that several quarters of groundwater monitoring be performed to assess evolving conditions PSC has since performed groundwater monitoring at the site in June and October of 2000 and in January, April and July of 2001 Results of these groundwater monitoring events, which were duly submitted to the County, indicated relatively high concentrations of petroleum impact in groundwater at the MW-2 location 5 March 2002 Subsurface Site Investigation 1717 South Center Street-Stockton,California Prepared by Phdip Services Corp H 1ENv162400132�121362EGTroje ls\StockCenL\march2002invcst,gation doc May 14 2002