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DATA GAP ASSESSMENT WORK PLAN AND PATH TO CLOSURE REVIEW Chase Chevrolet, 424 N. Van Buren Street Proposed Scope of Work January 2, 2018 4.0 PROPOSED SCOPE OF WORK To close the data gaps under SWRCB LTCP, Stantec proposes to advance two direct push soil borings at onsite locations (SB-1 and SB-2) to collect shallow soil and grab groundwater samples, install three shallow soil vapor probes (SV-1 through SV-3), and perform an updated sensitive receptor survey within 1,000 feet of the site. A summary of the proposed scope of work follows below. Proposed assessment locations are illustrated on Figure 2 and Stantec's field procedures are included in Appendix E. 4.1 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 sampling, air monitoring, 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. 4.2 PERMITTING AND NOTIFICATIONS Stantec will obtain a monitoring well and soil boring installation permit, or permits as necessary, from SJCEHD. Additionally, an encroachment permit from the City of Stockton Community Development Department (CDD) will be obtained for the advancement of boring SB-2. Proper notification to SJCEDH and CDD per the terms of the permits will be provided prior to the execution of field work. 4.3 SUBSURFACE UTILITY CLEARANCE Prior to performing subsurface disturbance for the collection of soil and groundwater samples, Stantec will mark proposed assessment locations with white paint in accordance with Underground Services Alert North (USA) guidelines. Stantec will contact USA North at least 3 days prior to the start of field work to allow USA members to mark subsurface utility locations. Additionally, Stantec will contract a private utility locator to verify the locations of marked USA member utility lines and investigate the presence of utility lines that are not owned or operated by USA members. The subsurface will be cleared to a depth of 5 feet bgs with a hand auger (at Stantec bm \\us1312- f02\workgroup\ 1857 \ active\ 185703766\ 05_reportdeliv \deliverable \work_plan \185703766_20180102_424_von_buren_work_plan_final.docx 4.1