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Mr. Siddharth Sewalia August 10, 2017 improvements including parking areas and landscaping. It is proposed that wells PW08-076, PW08-155, PW08-180, EW-04, EW-04A, and INJ-14 be destroyed prior to construction activities and wells PW09- 080, PW09-123, PW09-198, PW09-338 be protected during construction. In addition, the conveyance piping and electrical conduit associated with EW-04, EW-04A and INJ-14 will be removed prior to construction. The wells and conveyance piping are not located in an area of known or suspected soil contamination. Chemicals of concern (DBCP, EDB, and sulfolane) concentrations in the water table zone are presented on Figure 4. SCOPE OF WORK The well destruction activities consist of pre-field activities, field activities, and reporting. Site-specific details are provided in the following sections. Site plans showing the locations of the wells proposed for destruction are included on Figures 2 and 3. Pre-Field Activities Updates to the site-specific health and safety plan (HASP), permitting and underground utility clearance activities will be conducted prior to well destruction, as described in the following subsections. Health and Safety The site-specific HASP will be updated to include procedures and hazards specific to well destruction activities and associated piping removal to protect workers and the community. The HASP will be approved by a designated Health and Safety Specialist. HASP procedures will be reviewed by subcontractors and field staff prior to beginning field work. Permits Arcadis will obtain applicable well destruction permits from the San Joaquin County Environmental Health Department (SJCEHD). Arcadis will notify the SJCEHD at least 48 hours prior to commencing field activities, in accordance with the permit. Underground Utility Clearance Underground Service Alert North (USA North) will be notified of the intent to conduct subsurface activities at least 48 hours prior to commencement of destruction activities and in accordance with state law. A private utility locator will be utilized to further evaluate locations for potential underground utilities (e.g. pipes, electrical conductors, fuel lines, and/or sewer lines) before intrusive work is performed (in addition to contacting USA North). Each well location will be cleared to a depth of 5 feet below ground surface (bgs) using air-knife or hand-digging methods to further evaluate for the presence of underground utilities. Field Activities Field activities will include: well destruction and conveyance piping and electrical conduit removal as described below. arcadis.com Page: Lathrop Well Destruction Work Plan (8.10.2017).docx 2/4