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Stallworth Auto Detail October 2013 <br /> 602 California Street W, Stockton <br /> Claim No: 12235 <br /> Monitoring Well Information <br /> Well Date Installed Screen Interval Depth to Water <br /> Designation (feet bgs) (feet bgs) <br /> (09/23113) <br /> MW1A January 1996 20 - 40 25.21 <br /> MW1 B <br /> January 1996 30 - 50 25. 47 <br /> MW1C January 1996 125 - 135 25.72 <br /> MW1D January 1996 140 - 150 26 . 12 <br /> MW2 June 2000 30 - 5025. 31 <br /> MW3 June 2000 20 - 40 26. 59 <br /> MW4 June 2000 20 - 40 25. 75 <br /> MW5 June 2002 20 - 40 26. 26 <br /> MW6 June 2002 20 - 40 26. 89 <br /> MW7 June 2007 60 - 70 26.40 <br /> MW8 June 2007 60 - 70 26.40 <br /> MW9 March 2008 60 - 70 26. 30 <br /> MW10 March 2008 60 - 70 NM <br /> MW11 March 2008 60 - 70 27. 15 <br /> NM: Not measured <br /> Remediation Summary <br /> • Free Product: None encountered . <br /> • Soil Excavation : Contaminated soil was excavated to a depth of 10 feet during UST removal. <br /> • In-Situ Soil Remediation : Soil vapor extraction was conducted between September 2010 and <br /> August 2011 which reportedly removed approximately 10 , 201 pounds of hydrocarbons . <br /> Groundwater Remediation : ISCO pilot test between April and July 2012 . ISCO has been <br /> approved. <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/k (date)] <br /> Benzene NA <0. 005(05/23/00) <br /> Eth (benzene NA <0. 005(05/23/00) <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 /> *Excavation conducted to 10 feet <br /> Page 7 of 12 <br />