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WORK PLAN FOR GROUNDWATER INVESTIGATION Chevron Service Station # 94054 Stockton, CA October 26, 2016 events, but historical trends have shown some fluctuations. Due to the historical concentration trends seen in the sentinel groundwater wells, and as noted in the recent CVRWQCB correspondence, additional delineation of dissolved impacts in the A and B zones is warranted. Table 2 contains the historical groundwater monitoring and analytical data and Table 3 summarizes the site-related soil boring and well construction details. For a full background historical site activities see Appendix B. 3.0 Proposed Scope of Work Stantec plans to install three groundwater monitoring wells as detailed below to enhance the delineation of the identified 'A' and 'B' hydrogeologic zones. 3.1 SITE HEALTH AND SAFETY PLAN As required by the Occupational Safety and Health Administration Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910.120), and by the California Occupational Health and Safety Administration "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, Section 5192), Stantec will create a site-specific Health and Safety Plan (HASP) prior to the commencement of field work. The HASP will outline potential hazards to Stantec field personnel during the field activities described herein. Job safety analyses for tasks to be performed by Stantec personnel (e.g., driving, soil gas well installation, vapor sample collection, etc.) will be included. The HASP will also include required personal protective equipment to be worn by Stantec field personnel for each task. In addition, Stantec will produce a Journey Management Plan (JMP) to prevent losses associated with motor vehicle incidents. A copy of Stantec's HASP and JMP will be distributed to subcontractors prior to field work, and will be available on-site during field activities. Subcontractors will also develop a site-specific HASP and JMP for tasks applicable to their scope of work (e.g., driving, air-knifing, advancing soil borings, etc.). Stantec will review subcontractor HASPs prior to commencing field activities. Appropriate subcontractor HASPs will also be available on-site. 3.2 PERMITTING AND NOTIFICATION Prior to initiating any field work, Stantec will apply for a subsurface drilling permit from San Joaquin County Environmental Health Department (SJCEHD) for the installation of groundwater monitoring wells MW-15, MW-16B, and MW17B (Figure 3). Notification will be provided to the SJCEHD no less than 48 hours prior to the initiation of field work, and to the property owners in accordance with the access agreement. Stantec will also obtain an encroachment permit from the city of Stockton for the wells planned to be installed in the city right of way. Stantec 3