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30 January 2014 AGE Project No . 99-0682 Page 14 of 28 approximately 1 , 500 feet southwest of the site . It is unlikely that water in McCleod Lake is contaminated by impacted groundwater from the site based on its distance and direction (up-gradient) from the site . 9.0 . HISTORICAL SOIL REMEDIATION - SOIL VAPOR EXTRACTION Between 14 September 2010 (start-up ) and 22 August 2011 , an SVE remediation system was operated at the site, utilizing a natural gas-fired , thermal/catalytic oxidizer SVE system to selectively apply an induced vacuum to wells VW-1 , VW-2 , VW-3 and VW-4. SVE procedures for the site were described in AGE-prepared Interim Soil Remediation Work Plan (dated 25 July 2008) and approved by the SJCEHD , by letter dated 25 July 2008 . Based on influent sampling results , the on-site SVE system removed an estimated 10 , 201 pounds , equivalent to 1 , 632 gallons of adsorbed petroleum hydrocarbons from the vadose zone at the site (Tables 6, 7 , and 8) . On 22 August 2011 the on-site SVE system was temporarily shut down for the performance of an SVE rebound response test. The system was restarted for a period of 247hours on 19 October 2011 and subsequently sampled on 20 October 2011 as part of the SVE rebound test. Following the 22 August 2011 shut off date, SVE operations were suspended at the site for a period of 58 days (2-months). Following the 2-month period , the SVE remediation system was restarted and allowed to operate for a period of 24rfturs to achieve equilibrium conditions . After the 24-hour operation period , rebound response SVE influent and effluent air samples were collected . Results of the SVE rebound response test did not indicate any significant spike in vapor concentrations had occurred , and generally appeared to be within the range of previously encountered hydrocarbon concentrations . The SVE system currently remains non- operational based on results of the pilot test. 10.0. REMEDIAL FEASIBILITY TESTING - W--SITU CHEMICAL OXIDATION Between 29-31 May, 04-06 June , 13- 15 June and 18-20 June 2012 , a total of twelve ( 12) batches of a 5% solution of hydrogen peroxide (approximately 2 ,400 gallons) were prepared on-site and pressure injected into wells MWAA and MW-8 as part of an in-situ chemical oxidation ( ISCO) pilot test. procedures for the site were described in AGE- prepared Interim Soil Remediation Work Plan (dated 25 July 2008) and approved by the SJCEHD , by letter dated 25 July 2008 . Advanced GeoEnvironmentay Inc.