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In-Situ Chemical Oxidation Pilot Study Report BOULEVARD AUTOMOTIVE SERVICE 2151 Country Club Boulevard, Stockton, California 1.0. INTRODUCTION At the request of Mr. John Parker,Advanced GeoEnvironmental, Inc. (AGE)has prepared this In-Situ Chemical Oxidation Pilot Study Report for the property located at 2151 Country Club Boulevard, Stockton, California (site). The pilot study was conducted to evaluate the effects of chemical oxidation to hydrocarbon impacted ground water at the site. During the pilot study,AGE performed the following scope of work: baseline ground water monitoring and sampling; four weeks of in-situ chemical oxidation pilot injections in wells DPE-1 and DPE-2 and monitoring of field parameters in selected wells; four post-injection monitoring and sampling events; and preparation of this report. The site and surrounding area are illustrated in Figure 1. Structures, borings and well locations are illustrated in Figure 2.Well construction details are included in Table 1. 2.0. DESCRIPTION OF REMEDIAL TECHNOLOGY Advanced Oxidation Processes (AOP) refers to a set of treatment options used to remediate organic and inorganic wastes from water. In general, four common AOP's are used in industry to remediate hydrocarbons in soil and ground water: hydrogen peroxide, ozone, RegenOxTm and Fenton's Reagent.AOP are commonly used to remediate gasoline from underground fuel tank leaks and to treat waste water. The most predominant radical found in the reaction is the hydroxyl radical. The hydroxyl ion generally grabs hydrogen atoms from the organic molecules in contaminated waters and causes organic molecules to become unstable and eventually breakdown. The end product of these reactions is generally small amounts of mineral acid from halogens, nitrogen or sulfur present in soil in ground water, bicarbonate and water. For this in-situ chemical oxidation (ISCO) pilot study, a mixture of 5% hydrogen peroxide and muriatic acid (Modified Fenton's Reagent) was utilized at the site as outlined in the AGE-prepared, In-situ Chemical Oxidation Pilot Test Work Plan, dated 20 October 2011. 3.0. PROCEDURES Pre- and post-ISCO pilot test activities included the following scopes of work: • 13 January 2012: Background/baseline ground water monitoring event; • Between 28 March and 30 March 2012: ISCO injection Event No. 1 was conducted at the site; Advanced GeoEnvironmental,Inc.