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Site Assessment Work Plan <br /> WEST CLAY PROPERTIES <br /> 639 West Clay Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> AdvancedGeo, Inc. (AGI) has prepared this Site Assessment Work Plan for the property <br /> located at 639 West Clay Street, Stockton, California (site). The proposed scope of work <br /> includes the advancement of four (4) soil borings to determine if the former 1 ,000-gallon <br /> waste oil tank has impacted shallow subsurface soils. <br /> The site and surrounding area are detailed in Figure 1. The on-site structures, monitoring <br /> well locations, and proposed soil borings are illustrated in Figure 2. Groundwater <br /> monitoring well construction details for the existing wells are summarized in Table 1. <br /> Analytical data and depth to water for the existing monitoring wells is detailed in Table 2. <br /> This work plan was prepared in accordance with a Central Valley Regional Water Control <br /> Board (CVRWQCB) directives in a letter dated 29 August 2023 (Appendix A). <br /> 2.0. SCOPE OF WORK <br /> AGI proposes to advance four (4) soil borings to 15 feet below surface grade (bsg) <br /> surrounding the former 1,000-gallon waste oil tank to assess shallow soil for potential <br /> impact of chlorinated volatile organic compounds (CVOCs). The proposed scope of work <br /> includes the following tasks: <br /> • Permitting and pre-field work activities. <br /> • Soil boring advancement and sample collection. <br /> • Boring abandonment. <br /> • Report preparation. <br /> Each of these tasks is described in greater detail below. <br /> 2.1. PRE-FIELD WORK ACTIVITIES <br /> Applicable site assessment permits will be obtained from the San Joaquin County <br /> Environmental Health Department (SJCEHD). In addition, a health and safety plan will be <br /> updated in accordance with Occupational Safety and Health Guidance Manual for <br /> Hazardous Waste Site Activities (National Institute for Occupational Safety and Health <br /> Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization, the proposed boring location will be clearly marked, and a utility <br /> clearance obtained through Underground Service Alert. <br />