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Groundwater Well Installation Work Plan Sharpe Army Depot <br /> Lathrop, California <br /> 3.1.4 Burrowing Owl Management <br /> Before conducting any field operations for wells located on Sharpe, steps will be taken to mitigate any <br /> potential adverse effects on burrowing owls in the area. These steps include following procedures <br /> outlined in the Burrowing Owl Management Plan (Albion Environmental, 1997), performing a burrowing <br /> owl survey, and reviewing information from the most recent annual burrowing owl census. <br /> Active monitoring by an onsite Qualified Biologist will be required during well installation activities if any <br /> active burrows are found at the site or within a 100-meter buffer or if burrowing owls are observed at the <br /> site during the survey. <br /> Biological surveys and monitoring are not required for well installation outside the Sharpe boundaries. <br /> 3.1.5 Support Facilities <br /> Support facilities include lockable containers, portable containment tanks, and bins with lids. Lockable <br /> support facilities will be secured when project personnel are not onsite. An equipment decontamination <br /> pad will be located within the Sharpe boundary at a suitable location that allows for access and egress of <br /> drilling equipment and has a source of potable water. Decontamination water will be collected in portable <br /> tanks for subsequent disposal. It is anticipated that most of the support facilities will be located in the <br /> Ahtna Environmental, Inc. site trailer parking lot and at the Central Area Groundwater Treatment Plant <br /> (GWTP). Sanitation facilities will be located at the onsite Ahtna field trailer. For offsite well construction, <br /> sanitation facilities (e.g., porta-potties) will be reserved for each job site. <br /> Offsite wells will require support facilities located at the proposed well locations. <br /> 3.1.6 Security <br /> Field activities will be performed within and outside the Sharpe installation boundaries. Access will be <br /> limited to project personnel, subcontractor personnel, and authorized visitors. <br /> 3.1.7 Traffic Control Plan <br /> Traffic will be controlled following the Traffic Control Plan, available as Appendix C in the APP (Ahtna, <br /> 2022c). Traffic control may include using as necessary signage, barricades, traffic cones, flaggers and <br /> fencing. For onsite well installation, the impact on traffic flow is expected to be minimal; however, if <br /> warranted by work-space needs and traffic patterns, additional signs and traffic control personnel will be <br /> used if warranted. For offsite well installation, the impact on traffic flow will be minimized to the extent <br /> practicable, but temporary road closures are anticipated during work hours. <br /> 3.2 Well Installation Activities <br /> Groundwater extraction and monitoring wells will be installed using a truck-mounted mud rotary or sonic <br /> drill rig operated by a State of California-licensed driller. <br /> Proposed well construction specifications (Table 1) are based on local geology and hydrogeology, <br /> groundwater contaminant concentrations and trends, construction specifications of existing wells in the <br /> vicinity, and professional judgment. The proposed well locations are included in Figures 6 and 8. Figures <br /> 3 through 5 show the hydrogeologic cross-section with the proposed wells in relation to nearby wells and <br /> groundwater plumes. <br /> Ahtna Environmental,Inc. 8 <br />