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Interim Remediation Work Plan <br /> WEST CLAY PROPERTIES <br /> 639 West Clay Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Ms. Tina Mayhew, Advanced GeoEnvironmental, Inc. (AGE) has prepared the <br /> enclosed interim remediation work plan for the property located at 639 West Clay Street, Stockton, <br /> California. This work plan is prepared in accordance with Central Valley Regional Water Quality <br /> Control Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) <br /> sites. The location of the site is illustrated on Figure 1. A plan of the site is illustrated on Figure 2. <br /> 2.0. REGULATORY DIRECTIVE AND SCOPE OF WORK <br /> The San Joaquin County Environmental Health Department (EHD) has required, by letter dated <br /> 04 September 2003, interim remediation of soil near the former UST cluster area(Appendix A). To <br /> achieve the requirements of the EHD directive,AGE proposes excavation and disposal of petroleum <br /> hydrocarbon-impacted soil. Procedures for excavation, soil sampling and analysis, and disposal of <br /> hydrocarbon-impacted soil are presented below. <br /> 3.0. OVER-EXCAVATION <br /> As part of interim remediation,AGE proposes over-excavation of petroleum hydrocarbon-impacted <br /> soil near the former UST cluster area. Removal of impacted soil will significantly reduce the mass <br /> of hydrocarbons in the vadose zone and prevent further leaching of contaminants to ground water. <br /> 3.1. SOIL REMOVAL AND DISPOSAL <br /> Soil removal activities will consist of excavation and disposal of petroleum hydrocarbon-impacted <br /> soil related to the unauthorized release at the former UST cluster area. The proposed area of <br /> excavation was delineated based on the analytical results for soil samples collected during the UST <br /> removal, and from borings EW-1 and B-9 (Table 1, Figures 2 and 3),which indicated that the area <br /> in which the referenced soil borings were advanced appears to be significantly impacted by <br /> petroleum hydrocarbons. AGE proposes to transport petroleum hydrocarbon-impacted soil off-site <br /> for disposal at an appropriately licensed disposal facility. Soil removal tasks include: <br /> Advanced GeoEnvironmental.Inc. <br />