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Table 21 <br /> Soil Vapor Extraction Systems -Combined Soil Vapor Emissions Data <br /> Parcel 2A- L&M OU <br /> 666 West Weber Avenue, Stockton, CA <br /> Concentrations <br /> Ethyl- Total <br /> FID TPHg TPHd Benzene Toluene benzene Xylenes MtBE <br /> Date Sampled Sample ID (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) <br /> 2/28/2012 SV-INFCOMB -- <5.0 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 3/16/2012 SV-INFCOMB 38 <5.0 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 4/20/2012 SV-INFCOMB 564 29 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 5/8/2012 SV-INFCOMB 10 <5.0 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 6/22/2012 SV-INFCOMB 184 16 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 7/12/2012 SV-INFCOMB 57 <5.0 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 8/15/2012 SV-INFCOMB 26 <5.0 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 9/21/2012 SV-INFCOMB 40 <5.0 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 10/19/2012 SV-INFCOMB 1,700 7.8 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 11/28/2012 SV-INFCOMB 20 <5.0 -- <0.050 <0.050 <0.050 <0.050 <0.10 <br /> 12/21/2012 SV-INFCOMB -- -- -- -- -- -- -- -- <br /> Definitions: <br /> -- Data not available or not collected <br /> lbs Pounds <br /> FID = Flame Ionization Detector MtBE = Methyl tertiary Butyl Ether <br /> ppmv = Parts per million by volume < =Value is less than laboratory reporting limit <br /> TPHg =Total petroleum hydrocarbons as gasoline ppmv = Parts per million by volume <br /> Notes: <br /> Molecular Weights: <br /> TPHg <br /> Benzene <br /> MtBE <br /> Specific Weight: <br /> Specific Weight of TPHg = 6.1 pounds per gallon <br /> Specific Weight of benzene = 7.4 pounds per gallon <br /> Specific Weight of MtBE =6.18 pounds per gallon <br /> I:\Tidewater\TW Stockton(P2A)\Engineering\O&M\Tables\O&M Tables 2012\4Q12\Parcel 2A OM Tables 4Q12.xlsx Page 2 of 2 <br />