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Treatability Study Report and Feasibility Evaluation for <br />In Situ Petroleum Hydrocarbon Remediation <br />Field Maintenance Shop #24, 8020 South Airport Way <br />Stnrktnn (alifnrnia <br />3.2.7. Vapor Mass Removal <br />Vapor mass removal during SVE was calculated based on the initial and final TPH-g laboratory <br />analytical concentrations and an average flow rate of approximately 50 scfm. The vapor mass <br />removal rate during SVE testing decreased from an initial 20.9 pounds per day (lbs/day) to <br />14.3 lbs/day at the end of testing at FMS-SVE1. The average vapor mass removal rate was <br />17.2 lbs/day. <br />Based on the average mass removal rate, approximately 4.4 pounds of TPH-g was removed <br />from the subsurface during the 6 -hour duration of SVE testing at well FMS-SVE1. <br />Mass removal calculations are included in Appendix G. <br />OTIE 1y <br />