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Table 12 <br /> Dual Phase Extraction System-Soil Vapor Influent Analytical Data and Mass Recovery <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 /> Well Influent Concentrations PHg Recovery TPHd Recovery Benzene Recovery MtBE Recovery <br /> Hour Field Well I Recovery Recovery Recovery Recovery <br /> Meter Flow Field Ethyl- Total Rate Period Net Cumulative Rate Period Net Cumulative Rate Period Net Cumulative Rate Period Net Cumulative <br /> Date Sample Reading Rate Temp TPHg TPHd Benzene Toluene benzene Xylenes MtBE (lbs/day) Recovery Recovery (lbs/day) Recovery Recovery (lbs/day) Recovery Recovery (lbs/day) Recovery Recovery <br /> Sampled ID Notes (hours) (scfm) (°F) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) (ppmv) [1] 1 (lbs)[2] (Ibs)[3] [1] (Ibs)[2] (Ibs)[3] [1] (lbs)[2] (Ibs)[3] [1] (Ibs)[2] (Ibs)[3] <br /> Definitions: <br /> --=Data not available NS=Not sampled or not analyzed <br /> <=Value is less than laboratory reporting limit ppmv=Parts per million by volume <br /> lbs=Pounds scfm=Standard cubic feet per minute <br /> MtBE=Methyl tert-butyl ether TPHg=Total petroleum hydrocarbons as gasoline <br /> NA=Not applicable <br /> Notes: <br /> a=System permitted under ATC number N-4878-1-1. Source test for air board. Extracted groundwater being held in onsite holding tank. System shut down following source test. <br /> b=System started for 24-hour collection of vapor PAH samples. <br /> c=System shut down following vapor PAH sampling. PAH results outside of ATC limits(no detectable PAHs in influent vapor stream);alternate ATC needed to operate. <br /> d=ATC Number N-4878-1-2 issued 7/20/2004.System restarted. <br /> e=Source test for air board. System shut down following source test due to on-site excavation activities. <br /> f=System shut down following completion of vapor PAH sample collection. <br /> g=System shut down since 6/3/2005 no discharge and no sampling activities. <br /> h=System sampled following startup. <br /> i=System running solely on ASVE-1 through ASVE-6. <br /> j=System air flow rate and temperature based on historical averages due to inadvertent omission from field notes. <br /> k=System not sampled for analytical due to electrical problems with the extraction blower.Removal calculation based on previous months analytical data. <br /> I=SV-INF collected one day after O&M readings due to collapse of sample bag collected on 7/30/2007. <br /> m=Diesel analyzed by Air Toxics LTD via EPA Method TO-17. <br /> n=System shutdown with regulatory approval. TPHd sampled on 10/28/11 <br /> o=Influent samples not obtained due to system shutdown status. <br /> p=Influent samples obtained due to planned restart of system. <br /> Kiff Analytical Molecular Weights: Specific Weight: <br /> TPHg=95 g/mol Specific Weight of gasoline=6.1 pounds per gallon <br /> Benzene=78.1 g/mol Specific Weight of benzene=7.4 pounds per gallon <br /> MtBE=88.2 g/mol Specific Weight of MtBE=6.18 pounds per gallon <br /> Specific Weight of diesel=7.18 pounds per gallon <br /> Air Toxics Molecular Weights: <br /> TPHd= 233 g/mol <br /> Equations: <br /> [Average of consecutive concentrations(ppmv)] <br /> Recovery Calculations:— X[Molecular Weight(g/mole)]X[1 Ibs/453.59 g]X[1.2641 moles/1 cf]X[Average of consecutive Flow Rates(scfm)]X[60 min/hr]X[24 hr/day]=XX.XXX Ibs/day <br /> [1,000,000 parts] <br /> hTidewaterMW Stockton(P2A)\Engineering\O&M\Tables\O&M Tables 2013\3Q13\Parcel 2A OM Tables 3Q73.bsx Page 3 of 3 <br />