SITE INFORMATION AND CORRESPONDENCE 2002 - 2013

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Cherokee Truck Stop ` f - 2 - August 25, 2011 • Minimum Groundwater Depth: 55.31 feet below ground surface (bgs) at monitoring well S11 • Maximum Groundwater Depth: 75.96 feet bgs at monitoring well MW-9 • Groundwater Flow Direction: Predominately to the northeast with an average gradient of 0.001 feet/foot. • Soil Types: The Site is underlain by interbedded and intermixed sand, silt and clay Monitoring Well Information Well Designation Date Installed Screen Interval Depth to Water (feet bgs) (feet bgs) Mar 2011 MW-2 Mar 01 65-85 60.10 MW-3 Mar 01 65-85 61.00 MW-4 Mar 01 65-85 59.85 MW-5 Mar 01 55-75 60.68 MW-6 Mar 01 55-75 61.26 MW-7 Dec 02 87-92 60.73 MW-8 Oct 05 65-75 60.66 MW-9 Oct 05 95-105 60.85 S11 Jun 06 70-100 - S12 Jun 06 70-100 - S13 Jun 06 70-100 - Petroleum H drocarbon Constituent Concentration Contaminant Soil m /k Water (ug/L WQOs Maximum Latest Maximum Latest (ug/L) Mar 2011 TPHg NA NA 2,600 <50 5 TPHd NA NA 1,600 <50 56 Benzene NA NA 17 <0.5 0.15 Toluene NA NA 69 <0.5 42 Eth (benzene NA NA 98 <0.5 29 Xylenes NA NA 380 <0.5 17 MTBE NA NA 230 <0.5 5 TBA NA NA 9.6 <10 12/1,200' 1,2-DCA NA NA 510 48 0.5 NA: Not Analyzed, Not Applicable or Data Not Available mg/kg: milligrams per kilogram, parts per million ug/L: micrograms per liter, parts per billion WQOs: Water Quality Objectives "According to GeoTracker,wells e California Department of Public Health Notification Level/Response Level Site Description The Site is located at 3535 Cherokee Road in Stockton, California and is an active truck stop. The Site is bounded by Newton Road to the southwest, businesses to the north, East Cherokee Road to the southeast and interstate 99 to the east. The surrounding land use is commercial.