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Table 9 <br /> Dual Phase Extraction System-Groundwater Mass Recovery and Adsorption <br /> Parcel 2A-L&M OU <br /> 666 West Weber Avenue,Stockton,CA <br /> (In order to show best estimate,recovery calculations assume one-half of the detection limit when the compound is reported as less than the detection limit.) <br /> System Data Influent Concentrations TPHg Recovery TPHd Recovery TPHo Recovery I Benzene Recovery MTBE Recovery TBA Recovery <br /> Period Period Period Period Period Period Period <br /> Volume Net Cumulative Net Cumulative Net Cumulative Net Cumulative Net Cumulative Net Cumulative <br /> Date Extracted TPHg TPHd TPHo Benzene MtBE TBA Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed Adsorbed <br /> Sampled (gallons) (pg/L) (pg/L) (pg/L) (pg/L) (Ng/L) (pg/L) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) (lbs) <br /> Current Reporting Period: September 21,2012 to December 21,2012 Cumulative Totals: March 18,2004 through December 21,2012 <br /> Operational Hours 48.0 hours Number Days Operational Since Startup 1,600 days <br /> Extracted Ground Water 30,908 gal Cumulative Total Gallons Extracted 6,877,073 gal <br /> Average Flow Rate 0.24 gpm Cumulative Average Flow Rate 2.98 gpm <br /> Pounds of TPHg Removed 0.02 lbs 0.0 lbs/day Cumulative Pounds of TPHg Removed 152.13 lbs 0.1 lbs/day <br /> Pounds of TPHd Removed 1.44 lbs 0.7 lbs/day Cumulative Pounds of TPHd Removed 9,550.48 lbs 6.0 lbs/day <br /> Pounds of TPHo Removed 0.77 lbs 0.4 lbs/day Cumulative Pounds of TPHo Removed 5,141.84 lbs 3.2 lbs/day <br /> Pounds of Benzene Removed 0.000 lbs 0.000 lbs/day Cumulative Pounds of Benzene Removed 0.074 lbs 0.000 lbs/day <br /> Pounds of MTBE Removed 0.000 lbs 0.000 lbs/day Cumulative Pounds of MTBE Removed 0.025 lbs 0.000 lbs/day <br /> Pounds of TBA Removed 0.001 lbs 0.001 lbs/day Cumulative Pounds of TBA Removed 0.532 lbs 0.000 lbs/day <br /> Definitions: Equations: <br /> TPHg=Total petroleum hydrocarbons as gasoline gal=gallons <br /> TPHd=Total petroleum hydrocarbons as diesel pg/L=micrograms per liter lbs adsorbed=(gallons groundwater extracted)*(AVG ug/I removed)*(2.2 Ib/kg)*(3.785 1/gal)*(10A-9 kg/ug) <br /> TPHo=Total petroleum hydrocarbons as oil lbs/day=pounds per day <br /> MTBE=Methyl-tertiary butyl ether lbs =pounds <br /> TBA=tertiary-butyl alcohol <=Value is less than laboratory reporting limit <br /> gpm=gallons per minute --=Not analyzed/Not applicable <br /> l:\Tidewater\TW Stockton(P2A)\Engineering\O&M\Tables\O&M Tables 2012\4Q12\Parcel 2A OM Tables 4Q12.xlsx Page 3 of 3 <br />