Laserfiche WebLink
0 0 <br /> 1. Introduction <br /> This work plan was prepared on behalf of SPX Cooling Technologies to outline the <br /> installation of two groundwater monitor wells at the former Marley Cooling <br /> Technologies facility located in Stockton, California(the Site). The purpose for the <br /> proposed monitor wells is to improve the definition of the distribution of chromium <br /> concentrations in the shallow and intermediate zones north of the retort pit, to monitor the <br /> progress of additional in situ remediation at the retort pit area scheduled for the summer <br /> of 2016, and monitor water levels and estimate capture by well EW-4,when it is <br /> converted to an active remedial well. <br /> The two proposed wells will be installed as a well cluster and will be located <br /> approximately 15 to 18 feet east of well EW-4 and 20 feet north of the northeastern most <br /> injection point proposed at the former retort pit area(Figure 1). The wells will be <br /> completed in separate boreholes and will be spaced approximately 8 feet apart. One well <br /> will be completed in the shallow zone and identified as MW-402. The other well will be <br /> completed in the intermediate zone and identified as MW-451.The shallow zone is <br /> typically characterized as silt and clay interbedded with some sandy silt and silty sand. <br /> The intermediate zone is typically characterized as a clayey silt to sand and gravel. <br /> The proposed design and construction of the two new monitor wells is based on the June <br /> 2014 guidance manual "Well Design and Construction for Monitoring Groundwater at <br /> Contaminated Sites"prepared by the California Environmental Protection Agency <br /> Department of Toxic Substances Control and the February 2005 guidance manual <br /> "Standards for Well Construction and Destruction in San Joaquin County" prepared by <br /> the San Joaquin County Environmental Health Department. The following scope of work <br /> describes the tasks involved in constructing the new intermediate zone monitor wells in <br /> the South Yard. <br /> 2. Project Logistics — Preparation for Drilling <br /> Prior to the start of any work, Dudek will generate a site-specific health and safety plan to <br /> identify the hazards associated with drilling at the site. The health and safety plan will <br /> identify the nearest hospital to the project site and mark the shortest route to it. The <br /> health and safety plan will be on site during all work. <br /> Dudek will submit a well permit application to the San Joaquin County Environmental <br /> Health Department for the construction of the two groundwater monitor wells. Gregg <br /> Drilling, a California licensed drilling contractor in good standing with the San Joaquin <br /> County Department of Environmental Health, will be retained by SPX to construct the <br /> two groundwater monitor wells. <br /> The proposed well sites will be marked with white paint and identified with the proposed <br /> well identification. USA North 811 will be contacted at least 48 hours prior to <br /> Work Plan—Installation of Monitor Wells 9672 <br /> SPX Corporation I Dudek <br /> Stockton,California May 2016 <br />