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Site Assessment Work Plan <br />LARRY'S AUTO <br />308 North Grant Street, Stockton, California <br />1.0. INTRODUCTION <br />At the request of Mr. Charles Skobrak, Advanced GeoEnvironmental, Inc. (AGE) has <br />prepared this, Site Assessment Work Plan, for 308 North Grant Street, Stockton, <br />California (site). The work plan was prepared as required by the Central Valley Regional <br />Water Quality Board (CVRWQCB) by letter dating 19 April 2017, to evaluate shallow <br />soils near the northwestern tank pit areas of the site. Additionally, the work plan details <br />procedures for shallow soil sample collection in the southeastern portion of the site to <br />evaluate if a secondary source exists near well MW-5, where elevated hydrocarbon <br />dissolved hydrocarbon impact has been historically reported. A copy of the CVRWQCB <br />directive letter is included in Appendix A. <br />The location of the site is illustrated on Figure 1; a plan of the site is illustrated on Figure <br />2. Historical soil analytical data has been included as a reference as Table 1. This work <br />plan was prepared in accordance with the CVRWQCB guidelines for the investigation of <br />underground storage tank (UST) sites. <br />2.0. SCOPE OF WORK <br />In order to evaluate the site under the Low Threat Closure Policy, the CVRWQCB has <br />directed that shallow soil samples be collected near the former northwestern tank pit <br />(Figure 2). CVRWCB has also directed investigation of shallow soil near the former <br />waste oil tank pit area. Lastly, in an effort to explain elevated dissolved hydrocarbon <br />concentrations in downgradient well MW-5, the CVRWQCB has directed that shallow <br />soil samples be collected surrounding the wells location. The proposed scope of work <br />will include the following tasks: <br />Permitting and pre-field work activities; <br />Soil boring advancement and sample collection; <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 <br />be updated in accordance with Occupational Safety and Health Guidance Manual for <br />Hazardous Waste Site Activities (National Institute for Occupational Safety and Health