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r <br /> V D <br />�l4 <br /> A S S O C I A T E S I N C <br /> and the casing is 14 inches in diameter to 150 feet where it is reduced to 10 inches in diameter <br /> Extracted water is treated with a sand filter and granular activated carbon According to the <br /> EHD, the well is not currently being used since the lower aquifer has been contaminated by <br /> another site <br /> tApproximately 1,800 feet east of the site at 334 East Main Street, the logs indicated four <br /> monitoring wells are present at a gasoline service station (labeled Well No 1 on the map) <br /> These wells are located hydraulically crossgradient from the site and are used for monitoring <br /> purposes only <br /> Approximately 1,800 feet south of the site near Fourth Street and Elm Street is a municipal <br /> well identified as Well 6 (labeled Well No 3 on the map) The well is 340 feet deep, 16 <br /> inches in diameter, and screened from 84 feet to 338 feet below ground surface A sanitary <br /> ' seal is present from the surface to 54 feet bgs The well is hydraulically upgradient from the <br /> site <br /> Three other wells were identified within 2,000-foot radius during the survey Each well has <br /> been properly abandoned <br /> 6.0 NO FURTHER ACTION REQUIRED (NFAR)REPORTNG CRITERIA <br /> 6.1 NFAR Reporting Criteria Evaluation <br /> Using the criteria listed CRW CB's No Further Action Required (NFAR) Reporting, as outlined <br /> by CRWQCB (Section 6 0 of Appendix A of the Tri-Regional Recommendations), conditions at <br /> ' the subject site were evaluated to determine if NFAR for "Low Risk Vadose Zone Cases" is <br /> appropriate for this site <br /> Criterion 1: The source of the UST release has been identified and removed. <br /> ' In March 1990, one 1,500-gallon unleaded gasoline UST, one unleaded gasoline UST of <br /> unknown size, and associated piping and dispensing equipment were removed and <br /> transported off-site Laboratory analyses of soil samples collected from beneath the former <br /> 1,500-gallon UST location indicated the presence of detectable concentrations of total <br /> petroleum hydrocarbons Discoloration of the soil and a petroleum hydrocarbon odor <br /> were noted in the field After the tanks were removed, the areas of the former tanks were <br /> backfilled There are no known remaining USTs or ASTs at the site <br /> Criterion 2: The vertical and horizontal extent of subsurface impact has been adequately <br /> ' characterized. <br /> Three groundwater monitoring wells were installed on the site to the north, southeast, <br /> and southwest of the former tank excavation pit Low levels of TPHg and BTEX <br /> w 114981lrepGtU\C109UfC dor- 7 <br />