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' Stantec <br /> L & M OPERABLE UNIT-THIRD QUARTER 2010 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Groundwater Monitoring and Sampling <br /> October 27, 2010 <br /> 1 <br /> 2.4.2.1 Separate Phase Hydrocarbons <br /> tDuring the third quarter 2010, measurable SPH or SPH-sheen was observed in eight wells. <br /> SPH thicknesses for deep zone wells are summarized below. <br /> MW-17 Sheen <br /> MW-43 0.31 <br /> MW-46 Sheen <br /> MW-47 0.01 <br /> MW-48 0.03 <br /> MW-49 0.72 <br /> ' MW-50 30.03 <br /> MW-52 0.01 <br /> ' 2.4.2.2 Petroleum Hydrocarbons and Fuel Oxygenates <br /> ' TPHg, TPHd, TPHo, and Fuel Oxygenates with concentrations at or above the MRLs are <br /> summarized below.. <br /> ' TPI-Ig 4 15 0.072 (MW-29) 0.95 (MW-59) <br /> TPHd 11 15 0.062 (MW-44) 0.68 (MW-51) <br /> TPHo 5 15 0.061 MW-16) .0.52 (MW-58) <br /> Benzene 1 15 0.0049 (MW-58) <br /> Toluene 2 15 0.00078 (MW-24) 0.0013 (MW-58) <br /> ' Ethylbenzene 1 15 0.00053 (MW-58) <br /> Total Xylenes 2 15 0.0010 (MW-24) 0.00371 (MW-58) <br /> MtBE 4 15 0.00063 (MW-29) 0.00098 (MW-44) <br /> ' Definitions: <br /> ID = Identification <br /> mg/L= Milligrams per Liter <br /> ' MRL = Method Reporting Limit <br /> MtBE= Methyl tertiary butyl ether <br /> TPHd = Total petroleum hydrocarbons as diesel <br /> t <br /> TPI-Ig = Total petroleum hydrocarbons as gasoline <br /> TPHo= Total petroleum hydrocarbons as motor oil <br /> = Not applicable <br /> ATide ate/,TW Stockton(Parcel 2A-0475)\R"p \QMRU"0'701om100SSRORSRIIMR SW&Wn_FINALAac 2.9 <br /> 1 <br />