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r Canepa's Car Wash Downtown November 2013 248 East Park Street, Stockton Claim No: 1695 Monitoring Well lnformation ell Designation Date Installed Screen Interval Depth to Water (feet bgs) (feet bgs) 4/10/2013) MW-1 September 1994 45-65 21.57 MW-2 September 1994 45-65 22.34- MW-3 September 1994 45-65 22.70 MW-4 September 1994 40-60 No Access MW-5 September 1994 40-60 22,39 MW-6 September 1994 40-60 22.60 MW-7 September 1994 40-60 21.90 MW-8 July 2009 25-45 22.40 MW-9 July 2009 75-85 22.75 MW-10 July 2009 100-110 23.00- MW-11 1 July 2009 75-85 22.91 MW-12 July 2009 100-110 22.87 MW-13 August 2009 25-45 22.15 MW-14 August 2009 78-88 22.52 MW-15 September 2009 25-45 23.07 MW-16 September 2009 75-85 23.41- MW-17 September 2009 100-110 23.43 MW-18 December 2010 15-45 22.30 MW-19 December 2010 15-45 22.55 NM Not measured Remediation Summary • Free Product: No free product was documented throughout the life of this case. • Soil Excavation Unknown volume removed in 1990 to a depth of 12 feet bgs. • In-Situ Soil/ Groundwater Remediation: Dual phase extraction pilot test was conducted for 1,630 hours in 2013, removed approximately 3,416 pounds of TPHg and 11,700 gallons of contaminated groundwater. The DPE system was installed in mid-2013 and no operation, maintenance and monitoring reports have been submitted to document startup of the system. Most Recent Concentrations of Petroleum Constituents in Soil Constituent Maximum 0-5 feet bgs Maximum 5-10 feet bgs [mg/kg, depth, boring and (date)] [mg/kg, depth, boring and (date)] Benzene NA <0.005 a 10' MW-18 12/20/2012 Eth (benzene NA <0.005 CcD 10' MW-18 12/20/2012 Naphthalene NA NA PAHs NA NA NA: Not Analyzed, Not Applicable or Data Not Available mg/kg: Milligrams per kilogram, parts per million <: Not detected at or above stated reporting limit PAHs: Polycyclic aromatic hydrocarbons Note: Soil samples have been collected at less than 10 feet bgs. Page 7 of 13