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Offsite Assessment Work Plan RALPH'S SQUARE 2122 South Airport Way, Stockton, California 1.0. INTRODUCTION Advanced GeoEnvironmental, Inc. (AGE) has prepared this Offsite Assessment Work Plan for 2122 South Airport Way, Stockton, California (site). The work plan was prepared in accordance with Central Valley Regional Water Quality Control Board (CVRWQB) directives dated 06 August and 25 October 2018 (Appendix A). The scope of work includes the advancement of two (2) borings for the installation of offsite shallow groundwater monitoring wells to delineate the lateral limits of dissolved hydrocarbon impact. The site locations are illustrated in Figure 1. Site features, boring and well locations are illustrated in Figure 2. The proposed offsite well locations are illustrated in Figure 3. Historical groundwater elevation and analytical data are included in Tables 1 and 2, respectively. 2.0. SCOPE OF WORK Based on historical analytical data collected from site to date, additional downgradient assessment of shallow groundwater has been directed by the CVRWQCB. The proposed scope of work will include the following tasks: • Permitting and pre-field work activities. • Installation of two (2) shallow groundwater monitoring wells. • Development and survey of newly installed groundwater monitoring wells. • Performance of four (4) quarterly groundwater monitoring events. • Disposal of investigative derived waste. • Preparation of site investigation and groundwater monitoring reports. Each of these tasks is described in greater detail below. 2.1. PRE-FIELD WORK ACTIVITIES Applicable site assessment permits will be obtained from the San Joaquin County Environmental Health Department (SJCEHD) and encroachment permits will be obtained from the City of Stockton. In addition, a health and safety plan will be updated in accordance with Occupational Safety and Health Guidance Manual for Hazardous