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Super Center Mart January 2014 <br /> 701 East Charter Way, Stockton <br /> Claim No: 12741 <br /> M nitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> (04/15/13) <br /> MW-1 December 1998 14-54 Inactive <br /> MW-2 December 1998 28-48 28.29" <br /> MW-3 December 1998 28-48 Inactive <br /> MW-4 September 2006 28-48 29.39* <br /> MW-5 September 2006 28-48 27.68* <br /> MW-6 September 2006 28-48 27.92* <br /> MW-7 April 2004 28-48 28.90* <br /> MW-8a Aril 2004 28-48 Inactive <br /> MW-8b _ April 2004 80-86 Inactive <br /> MW-8c Aril 2004 109-123 Inactive <br /> MW-8d Aril 2004 140-150 Inactive <br /> MW-9a Aril 2004 28-48 Inactive <br /> MW-9b Aril 2004 80-86 Inactive <br /> MW-9c April 2004 109-119 Inactive <br /> MW-9d Aril 2004 140-150 Inactive <br /> MW-11 June 2009 28-48 26.87 <br /> NM: Not measured <br /> 'measured 11/28/12 <br /> Remediation Summary <br /> • Free Product: No free product reported in GeoTracker. <br /> • Soil Excavation: An unknown volume of impacted soil was excavated, disposed offsite, and <br /> replaced with clean fill in 1998. <br /> • In-Situ Soil/Groundwater Remediation: Dual phase extraction was conducted between <br /> January 2011 and present for a total of 7,518 hours, which has extracted 199,330 gallons of <br /> groundwater and 5,224 pounds of TPHg. The rate of TPHg removal in December 2012 was <br /> approximately 7 pounds per day. <br /> Most Recent Concentrations of Petroleum Constituents in Soil <br /> Constituent Maximum 0-5 feet bgs Maximum 5-10 feet bgs <br /> [mg/kg (date)] [mg/kg] <br /> Benzene <0.6 (03/20/98) <0.005 <br /> Eth (benzene 40 03/20/98) <0.005 <br /> Naphthalene NA NA <br /> PAHs NA NA <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> mg/kg: Milligrams per kilogram, parts per million <br /> <: Not detected at or above stated reporting limit <br /> PAHs: Polycyclic aromatic hydrocarbons <br /> Page 7 of 13 <br />