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washed PVC bailer The irrigation well was sampled at the wellhead To 19osen any trapped sediment in the wellhead, the water was allowed to run for several minutes The flow was then decreased to reduce volatilization of any hydrocarbons, and the water was sampled Groundwater Sampling Forms documenting well monitoring, purging and sampling data are included as Appendix A ' Groundwater samples were collected from wells VW-I and VW-2 using a new, disposable, polyethylene sampling bailer The samples were then packed m an iced cooler and transported ' under Chain-of-Custody manifest to NEI/GTEL Environmental Laboratories, inc , a California- certified analytical laboratory The laboratory analyzed the samples collected from all three wells for benzene, toluene, ethylbenzene,xylenes (BTEX) and Total Petroleum Hydrocarbons as gasoline (TPH-gasoline)using EPA Method 8015/8020 The sample from irrigation well #2 was also analyzed for Total Dissolved Solids (TDS) at the request of SJCEHD The laboratory reports and chain-of-custody documents are included as Appendix B ' Analytical results of the second quarter 1997 sampling event indicate that petroleum hydrocarbons are present in the groundwater beneath the site in the vicinity of the former UST TPH-gasoline was detected in groundwater samples collected from VW-1 at 170 micrograms per liter(ug/L) and in VW-2 at 12,000,ug/L Benzene,toluene, ethylbenzene, and xylenes were also ' present at high concentrations in groundwater samples collect from VW-2 (Benzene at 1000µg/L, toluene at 2400 µg/L, ethylbenzene at 500µg/L, and xylenes at 1900µg/L) No detectable petroleum hydrocarbons were encountered during analysis of groundwater collected ' from irrigation well 42. Analysis of groundwater collected from the irrigation well yielded TDS at a concentration of 400 milligrams per liter (mg/L) The current and historical laboratory results and their detection limits are summarized in Table 2 I 2 I