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1 <br /> 0 TPH-D concentrations were not detected in any of the groundwater samples collected <br /> this sampling event <br /> o BTEX concentrations were detected in 9 of the 14 groundwater monitoring wells (MW- <br /> 2 <br /> MW2 through MW-6, MW-8, MW-12, VW-1 and VW-2) Detectable concentrations of <br /> 1 benzene ranged from 0 4 to 1,400 pg/I The concentrations have generally decreased <br /> since the previous quarters sampling event <br /> o MTBE concentrations were not detected in any of the groudwater samples collected <br /> during this sampling event <br /> o Five monitoring wells at the site have benzene concentrations above the State of <br /> California Primary Drinking Water Standards (PDWS) for benzene <br /> o The oxygenates TBA, DIPE, ETBE, and TAME were not detected in the EPA Method <br /> 8260 analyses this quarter <br /> 5 0 RECOMMENDATIONS <br /> As benzene concentrations in five monitoring wells were above PDWS in this sampling <br /> event, PSI recommends that quarterly sampling continue at the site <br /> i <br /> F TransferlReporiSCA�TRANSYCalty097%710175STOCKTONlgm298fin 4 <br />