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. CALCULATION SHEET H-1 <br /> SITE CALCULATIONS — HYDROCARBON MASS & CLEAN-UP TIME <br /> Former Canteen Facility <br /> 1500 Shaw Road <br /> Stockton, California <br /> CONTAMINANT REMOVAL/RECOVERY DATA' <br /> Flow Rate Concentrations Removal Rate <br /> Phase (sr-fm), (gpm) (mg1L) (lbs/hr) <br /> Sorbed-Phase 1 Vapor 200 h' 2773 208 <br /> Groundwater 210 180 2• 0 049 <br /> LNAPL -- NA �- <br /> Special Notes f`l <br /> 1 The SVE flow rate is estimated from 5 wells operating at 40 scfm each <br /> 2 The groundwater concentration is the average(geometric mean)** <br /> VADOSE ZONE HYDROCARBON RECOVERY <br /> Total Vadose Zone Hydrocarbon Mass 20,079 pounds <br /> • Total Soil Volume 251,373 ft <br /> Time Required for One (1) Pore Volume 838 hours <br /> Estimated Time for Vapor Removal 082 years <br /> DISSOLVED-PHASE HYDROCARBON RECOVERY <br /> Total Water-Bearing Zone Hydrocarbon Mass 1616 pounds <br /> Total Soil Volume 50,275 ft <br /> Time Required for One (1) Pore Volume 119 hours <br /> 497 days <br /> Estimated Time for GW Mass Recovery 2.78 years <br /> NOTES <br /> 1 Input concentrations in mg/kg for soil and mg/L for groundwater and vapor <br /> 2 Input vapor flow rate in scfm for soil-vapor and gpm for groundwater and LNAPL <br /> 3 The average SVE remediation rate was estimated to be 15% of the initial removal rate <br /> 4 The average AS remediation rate was estimated to be 15% of the initial removal rate <br /> 5 The concentrations in soil and groundwater were estimated from the BTEX or TPH concentrations <br /> 6 Data in shaded fields is calculated <br /> • <br />