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Super Center Mart March 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 /> 12/20/13 <br /> MW-1 December 1998 14-54 NM <br /> MW-2 December 1998 28-48 NM <br /> MW-3 December 1998 28-48 NM <br /> MW-4 September 2006 28-48 29.06 <br /> MW-5 Se tember 2006 28-48 27.36 <br /> MW-6 September 2006 28-48 27.55 <br /> MW-7 A ri120_04 28-48 28.65 <br /> MW-8a Aril 2004 28-48 29.18 <br /> MW-8b Aril 2004 80-86 28.35 <br /> MW-8c Aril 20_04 109-123 28.30 <br /> MW-8d Aril 2004 140-150 28.35 <br /> MW-9a Aril 2004 28-48 27.99 <br /> MW-9b A ri12004 80-86 26.59 <br /> MW-9c A ri12004 109-119 26.47 <br /> MW-9d A ri12004 140-150 26.65 <br /> MW-11 June 20_0_9 28-48 27.65 <br /> NM: Not measured <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 January <br /> 2011 and present for a total of 7,518 hours, which has extracted 199,330 gallons of <br /> groundwater and 5224 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 lbenzene _ 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 8 of 13 <br />