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Lopez Property March 2014 <br /> 1601 French Camp Turnpike, Stockton <br /> Claim No: 18245 <br /> Monitorin Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> 09104/13 <br /> MW1 November 2004 10-30 16.30 <br /> MW2 November 2004 15-35 NM <br /> MW3 November 2004 15-35 NM <br /> MW4 December 2006 1535 NM <br /> MW5 December 2006 15-35 16.44 <br /> MW6 December 2006 15-35 16.13 <br /> MW7 December 2006 15-35 NM <br /> MW8 December 2006 55-65 16.50 <br /> MW9 Au ust 2007 110-120 NM <br /> MW10 Au ust 2007 50-60 16.38 <br /> MW11 Au ust 2007 5565 16.55 <br /> MW12 June 2010 162-72 NM <br /> NM: Not measured <br /> Remediation Summary <br /> Free Product: None reported in GeoTracker. <br /> Soil Excavation: An unknown volume of impacted soil was excavated to a depth of 10 feet and <br /> disposed offsite in 1987 (Advanced GeoEnviron mental, May 2011). <br /> In-Situ Soil/Groundwater Remediation: Soil vapor extraction was conducted between June <br /> 2013 and September 2013 for a total of 2,232 hours, which removed 340 pounds of TPHg. The <br /> rate of removal in September 2013 was approximately 2 pounds of TPHg per day. Ozone <br /> injection was conducted between April 2013 and September 2013. <br /> Most Recent Concentrations of Petroleum Constituents in Soil <br /> Constituent Maximum 0-5 feet bgs Maximum 5-10 feet bgs <br /> m /k date sample-feet] m /k date sam le-feet <br /> Benzene <0.005 04/03/12 01-5' <0.005 11/22/04 MW1-10' <br /> Eth (benzene <0.005 04/03/12 01-5' 0.08 11/22/04 MW1-10' <br /> Na hthalene 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 />