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Remediation Report Update - Third Quarter 2013 WATERLOO FOOD & FUEL 3032 East Waterloo Road, Stockton, California 1.0. INTRODUCTION AND SCOPE OF WORK At the request of Mr. Onkaar Dhaliwal of Waterloo Food and Fuel, Advanced GeoEnvironmental, Inc. (AGE) has prepared this report for the site located at 3032 East Waterloo Road, Stockton, California (site). The report updates the procedures and results of the remediation of hydrocarbon-impacted groundwater at the site between late June to late September 2013. The location of the site is illustrated in Figure 1. The locations of structures, soil borings, and monitoring wells at the site are depicted in Figure 2. The location of the groundwater extraction, soil vapor extraction equipment and piping network are depicted in Figure 3. Site background information is provided in Appendix A. Interim groundwater remediation utilizing groundwater extraction techniques was initiated at the site on 20 May 2003, in accordance with procedures outlined in the AGE-prepared Interim Remediation and Site Assessment Work Plan, dated 25 January 2001. Interim soil vapor extraction was initiated at the site on 06 December 2006 in accordance with procedures outlined in the AGE- prepared Interim Soil Remediation and Additional Site Assessment Work Plan, dated 12 November 2004. 2.0. GROUNDWATER EXTRACTION -TREATMENT REMEDIATION Groundwater remediation system installation and operation was performed in accordance with procedures approved by the San Joaquin County Environmental Health Department (EHD) and the Central Valley - California Regional Water Qaulity Control Board. The groundwater extraction system, consisting of the groundwater treatment unit (air-stripper and vessels of granular activated carbon), compressors, pneumatic pumps and associated piping, was installed in early 2003 and expanded in late 2008 (Figure 3). Between 21 June and 25 September 2013, the remediation of impacted groundwaterwas conducted utilizing an active air-stripper to remove and discharge hydrocarbons prior to granular activated carbon treatment. 2.1. GROUNDWATER REMEDIATION SYSTEM The groundwater treatment system is designed to operate at a maximum flow rate of 5 gallons per minute (GPM). Therefore, each of the active recovery wells (deep well EW-1, EW-2 and EW-4, shallow well EW-5, EW-8 and deeper well EW-9) were used to extract groundwater at a flow rate of approximately 1 GPM by extracting on an intermittent cycle. The operation of the groundwater pumps allows for a hiatus when water falls below the Advanced GeoEnvironmental, Inc.