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Revised Remedial Action Plan McBillin Real Estate investment Property 2154 South El Dorado Street,Stockton,California Page 7 SUMMARY OF PROPOSED ACTIVITIES The following sub-sections detail the proposed steps to implement the proposed Revised RAP which outlines the installation of the MPE system. The MPE system includes the addition of MPE wells, the installation of the MPE system, system start-up, and operation, maintenance, and monitoring of the system. All fieldwork described within this workplan will be completed in accordance with Apex's Standard Operating Procedures attached as Attachment B. Utility Clearance Apex will mark each area proposed for MPE well installation and trenching with white marking paint and/or wood stakes and notify Underground Service Alert (811 North) a minimum of 72 hours prior to commencement of field activities to allow for the marking of buried utilities. Site-Specific Health and Safety Plan Prior to the commencement of any Site activity,Apex will prepare a site-specific Health and Safely Plan (HASP) to be retained at the Site during all field activities. All work will be conducted according to the HASP. The HASP will contain information on the properties of the hazardous materials known to be on the Site. This information is equivalent to that contained within Material Data Sheets(formerly Material Safety Data Sheets). Emissions Permitting Apex has reached out to the San Joaquin Valley Air Pollution Control District (SJVAPCD) to inquire as to the permit requirements to construct and operate the Thermal/Catalytic Oxidizer proposed as part of the MPE at the Site. A Permit to Operate/Authority to Construct Application with appropriate fees will be required for submission prior to construction and operation of the MPE unit described further in the sections below. Submittal requirements for the permit to construct and operate the system described within this RAP will include the vapor recovery and emissions data from the Dual-Phase Axtraction Pilot Test Results Report (Apex, 2021). Influent and effluent vapor sampling of constituents of concern will be dictated by the permits issued by the SJVAPCD. Copies of the permits and sampling requirements will be attached to the Operations and Maintenance (O&M) manual for the Site described in more detail below. Sanitary Sewer Discharge Permit Apex has been in contact with the City of Stockton Industrial Pretreatment Department(the City) to obtain an application for discharging treated groundwater to the sanitary sewer system. The City stated that the discharge would require a prorated monthly connection fee and $1.97 for every 748 gallons treated and discharged. Based on the system discharging 20 gallons per minute(gpun), it would cost approximately $2,300 per month plus the monthly connection charge to operate the system at full capacity. Influent and effluent water sampling of constituents of concern will be dictated by the permits issued by the City of Stockton. Copies of the permits and sampling requirements will be attached to the Operations and Maintenance (O&M) manual for the Site described in more detail below.