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0 0 <br /> Section 3.0 Conclusions and Recommendations <br /> i (0.018 mg/kg). Sample T89-M-18' contained benzene (0.0010 J mg/kg), toluene (0.0039 J <br /> mg/kg), and xylenes (0.00113 J mg/kg). Sample T87-W-18' only contained total xylenes at a <br /> concentration of 0.0031 J mg/kg. TPHg was not detected above the laboratory method detection <br /> limit in any of the samples collected and analyzed from the Site. <br /> It should be noted that these concentrations are extremely low and well below the State Low- <br /> Threat UST Closure Policy criteria. This Site has been previously remediated for soil and <br /> groundwater contamination for TPHg and associated VOCs including benzene,toluene, <br /> ethylbenzene, and xylenes (BTEX), and received a no further action letter for these activities in <br /> February 22, 2012. Detectable concentrations of BTEX were still present in soil and groundwater <br /> when this no further action letter was issued. The low BTEX concentrations detected were <br /> primarily beneath the southernmost UST(T89) and western most sample from T87 that were <br /> closest to the former release areas that were formerly successfully remediated. These samples <br /> did not contain any detectable concentrations of oxygenates including MTBE, DIPE, ETBE, <br /> TAME, and TBA, indicating that these low concentrations of BTEX pre-date the use of <br /> oxygenates in gasoline and are most likely the result of residual concentrations remaining in Site <br /> soil from the documented historic release at the Site following completion of remedial activities, <br /> and do not constitute a recent release from the USTs. <br /> Based on these results, it does not appear that any recent impacts were present in the shallow <br /> soils at the Site where these samples were collected and no further action is recommended with <br /> respect to the UST, fuel line, and dispenser removal activities. Thrifty respectfully requests <br /> closure for these USTs removal activities. <br /> • <br /> RECEIVE <br /> FEB 2 6 2014 <br /> ENVIRONMENTAL <br /> HEALTH DEPARTMENT <br /> • <br /> Thrifty Station No. 171 6 Waterstone Environmental,Inc. <br /> February 2014 Project 13-140 <br />