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L & M OPERABLE UNIT-THIRD QUARTER 2014 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Soil Vapor Sampling <br /> October 31, 2014 <br /> Analyte Sample # Sample # �o Difference <br /> UPSV-3 UPSV-3D <br /> TPH ppmV) 5.6 5.9 5.2 % <br /> Methane ppmV 380,000 380,000 0% <br /> The trip blank did not contain analytes at or above laboratory reporting limits. <br /> 4.2.5 Conclusions <br /> TPHg concentrations increased in UPSV wells UPSV-3 and UPSV-3D. With the exception <br /> of benzene in UPSV-6, APSV-1, APSV-6, APSV-9, and APSV-10 this quarter, BTEX, <br /> naphthalene and the fuel oxygenates (MTBE, DIPE, ELBE, TBA, and TAME) have not been <br /> detected at or above laboratory MRLs since the fourth quarter of 2008 in APSV and <br /> UPSV wells. Methane has historically been reported sporadically in both APSV and UPSV <br /> wells. <br /> Although there were increases in benzene concentrations in apartment complex wells <br /> APSV-9 and APSV-10, Stantec does not need to implement SVE system contingency for <br /> restarting the system. Apartment soil vapor wells designated for monitoring the <br /> protection of apartment residents to their respective building remain below health <br /> protective screening levels. <br /> 5ta ntec 4.3 <br />