Laserfiche WebLink
Stantec <br /> L & M OPERABLE UNIT-THIRD QUARTER 2011 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Status of Remediation Activities <br /> October 28, 2011 <br /> 3.2.4 Apartment Soil Vapor Extraction System Analytical Data — 3Q11 <br /> During 3Q11 (June 16, 2011 through September 15, 2011) the ASVE system removed <br /> approximately 21.58 lbs (3.54 gallons) of TPHg, 5.79 lbs (0.81 gallons) of TPHd, 0.18 lbs <br /> (0.024 gallons) of benzene, and 0.40 lbs (0.063 gallons) of MtBE from the subsurface. To date <br /> the ASVE system has removed approximately 2,629.1 lbs (431.0 gallons) of TPHg, 5.79 lbs <br /> (0.81 gallons) of TPHd, 2.40 lbs (0.33 gallons) of benzene, and 5.00 lbs (0.81 gallons) of MtBE <br /> from soil vapor beneath the Delta View Apartments. Historical ASVE system operations and <br /> analytical data are presented in Tables 18 through 20. <br /> 3.3 SEPARATE PHASE HYDROCARBON REMOVAL <br /> SPH removal activities are conducted to remove observed SPH from wells on and offsite. SPH <br /> removal activities are conducted quarterly (at a minimum) for wells that repeatedly contain SPH <br /> sheen or a measurable thickness of SPH. <br /> The DPE Non-aqueous Extraction Technique (NET) free product removal system and periodic <br /> extraction from monitoring wells have removed approximately 5.7 gallons of SPH from <br /> groundwater beneath the Site between April 14, 2011 and July 14, 2011. Approximately <br /> 1,763.2 gallons of SPH have been removed from groundwater beneath the Site since <br /> May 10, 2004. <br /> SPH removal data can be found in Tables 16 and 17, and field notes from the SPH removal <br /> event can be found in Appendix H. <br /> I:\Tidewater\TW Stockton(P2A)\QMRs\2011\3Q11\3011 QSSR QRSR QMR Stockton_FINAL.doc 3.3 <br />