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Guardino — Crawford Company September 2013 <br /> 517 West Fremont Street, Stockton <br /> Claim No: 14349 <br />! Monitoring Well Information <br />! Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> (05/23/13) <br /> MW-1 July 1999 15-35 13. 72 <br /> MW-2 July 1999 10-30 14. 01 <br /> MW-3 July 1999 10-30 NM <br /> MW4 July 1999 10-30 13.65 <br /> MW-5 November 2000 10-25 13. 04 <br /> MW-6 November 2000 10-25 13 . 36 <br /> MW-7 September 2004 10-25 13.21 <br /> MW-8 September 2004 10-25 NM <br /> OB-1 June 2008 15-35 13 . 55 <br /> 013-2 June 2008 15-35 13 . 67 <br /> EW-1 June 2008 13-33 13 . 74 <br /> NM : Not measured <br /> Remediation Summary <br /> • Free Product: None reported noted in GeoTracker. <br /> • Soil Excavation: An unknown volume of impacted soil was excavated , disposed offsite, and <br /> replaced with clean fill in 2000 . <br /> • In-Situ Soil/Groundwater Remediation : Soil vapor extraction and air sparging system was <br /> installed in July 2012 but is now waiting for utility installation (AGE , 2012) . <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) sample name] [mg/kg (date) sample name] <br /> Benzene <0. 005 (04/17/08) 081 -5 <0 . 005 (04/17/08) VW1 -10 <br /> Eth (benzene <0. 005 04/17/08 OB1 -5 - <0 . 005 (04/17/08) VW1 -10 ; <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 12 <br />