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y..- vow In-Situ Chemical Oxidation Pilot Study Work Plan WELDON CHURCH 104 West Beverly Place, Tracy, California 1.0. INTRODUCTION On behalf of Mr.Weldon Church Advanced GeoEnviromnental,Inc(AGE)has prepared this work plan for an in-situ chemical oxidation(ISCO)pilot test at 104 West Beverly Place,Tracy,California. (site). The proposed ISCO pilot test would consist of injecting a 5 % solution of RegenOxTM, manufactured by Regenesis. Additionally, as part of the ISCO pilot test, the work plan details the �v procedures for installation of one additional ground water monitoring well adjacent to boring B-18' Q,} ion Tr The purpose of the pilot test is to determine if ISCO application and treatment is capable of i ly remediating petroleum hydrocarbon impact in soil and ground water from 5 to 25 feet below surface 5-1. r 01 grade (bsg). The location of the site is illustrated on Figure 1. A plan of the site is illustrated one bt" -V'0'11 Figure 2. A detailed background of work conducted at the site is included as Appendix A. A x1.6e, Q;o3T summary of site specific soil and ground water data collected to date are included in Tables 1 ral through 4. By letter dated 22 September 2009 (Appendix B), San Joaquin County Environmental Health Department(EHD)directed that a work plan be prepared for an ISCO pilot test.Additionally,prior to submitting a work plan,the EHD required that the Central Valley Regional Water Quality Control Board (CVRWQCB) be contacted to confirm that the pilot test would be in compliance with the CVRWQCB's requirements for injection to ground water. As a result,AGE contacted the CVRWQCB by letter dated 12 October 2009,and requested approval for performance of an ISCO pilot test at the site utilizing Regenox. In response to the request, the CVRWQCB determined that the pilot study would have to comply with the waste discharge requirements and General Order R-5-2008-0149.A copy of the CVRWQCB letter has been included as Appendix C. Additionally, a copy of the General Order has been included as Appendix D. 2.0 PROPOSED IN-SITU CHEMICAL OXIDATION TECHNOLOGY Advanced Oxidation Processes (AOP's)refers to a set of chemical treatment procedures designed to remediate organic and inorganic constituents from soil and water by oxidation.AOP is particularly useful for remediation of aromatic compounds, pesticides, petroleum constituents and volatile organic compounds. Oxidation of target contaminants is caused by direct reaction with oxidizers. This results in the development of hydroxyl radicals. The hydroxyl ion generally grabs hydrogen atoms from the organic molecules in contaminated waters and causes the organic molecules to become unstable and eventually breakdown. The end product of these reactions is generally water, carbon dioxide and salts. Advanced GeoEnvironmental,Inc.