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Well Destruction Work Plan <br /> FORMER APACHE PLASTICS <br /> 2050 Fremont Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr. Bill Stoermer of Fremont Plaza Investments, AdvancedGeo, Inc. <br /> (AGI) has prepared this Well Destruction Work Plan (Work Plan) for the destruction of a <br /> total of four (4) groundwater monitoring/remediation wells (MW-24, IW-3, VEW-2, and <br /> EW-1) at 2050 East Fremont Street, Stockton, California (site). The groundwater <br /> monitoring wells, and remediation wells are single-completed with 2-inch and 4-inch <br /> diameter well casings in 8-inch and 10-inch diameter boreholes. The site and the <br /> surrounding area are illustrated in Figure 1 . Structures, soil borings and well locations are <br /> illustrated in Figure 2. Well construction details are summarized in Table 1. <br /> This Work Plan provides procedures for the destruction of all groundwater monitoring and <br /> remediation wells that will interfere with construction activities at the site. Wells MW-24, <br /> IW-3, and VEW-2 will be destroyed by over-drilling methods and well EW-1 will be <br /> destroyed using explosives. All well destructions will be performed in accordance with <br /> San Joaquin County Well Standards. This Work Plan was developed in preparation for <br /> construction activities at the site. <br /> 2.0. PROCEDURES <br /> As required, a health and safety plan will be prepared in accordance with Occupational <br /> Safety and Health Guidance Manual for Hazardous Waste Site Activities (National <br /> Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. <br /> Environmental Protection Agency, 1985). Prior to drilling activities, each proposed drilling <br /> location will be clearly marked, and utility clearance obtained through Underground <br /> Service Alert. Well abandonment/destruction permits will be obtained from the San <br /> Joaquin County Environmental Health Department (EHD); additionally, the EHD will be <br /> notified a minimum of 48-hours prior to commencement of well destruction activities. <br /> Prior to well destruction activities, all wells will be checked for total depth and well integrity <br /> using a Solinst water level meter. Any obstructions found in the wells will be removed. <br /> AGI proposes to destroy wells MW-24, IW-3, and VEW-2 by over-drilling. The wells will <br /> be drilled-out to the total depth of the wells utilizing a hollow-stem auger drill rig equipped <br /> with 8.25-inch diameter augers. All original well construction materials will be removed <br /> (including well casing, screen, filter pack, and annular seal) by the drill rig to ensure that <br /> no residual contamination is sealed within the abandoned borehole and a vertical conduit <br /> does not remain. The borings will be completely backfilled to surface grade with a cement <br /> grout mixture (Portland type II) and finished at the surface with native soil or concrete to <br /> match the existing surface. The grout mixture will consist of a ratio of not more than six <br /> gallons of water for every 94-pound sack of Portland type 11 cement. The drill rig hollow <br />