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• Ammonia as N by EPA method 350.1; and <br /> • Dissolved Iron and Manganese by EPA method 200.7. <br /> One field duplicate will be collected for every 10 samples collected per analyte. A matrix <br /> spike/matrix spike duplicate (MS/MSD) sample will be collected during groundwater sampling. <br /> Quality assurance/quality control (QA/QC) samples will be analyzed by the laboratory per the <br /> same methods and controls as primary samples. Equipment blanks will be collected from non- <br /> dedicated sampling equipment once per field day. <br /> 4.2.6 Equipment Decontamination and Investigation-Derived Waste <br /> Prior to boring advancement and sample collection at each location, all drilling equipment, <br /> down-hole drilling tools, and sampling devices will be cleaned thoroughly with a portable steam <br /> cleaning system supplied by the drilling subcontractor. <br /> Non-dedicated equipment will be decontaminated before and after collection of each sample. <br /> Small and/or handheld equipment will be washed in a non-phosphate detergent and potable <br /> water, rinsed in potable water, and then double-rinsed in deionized water. <br /> Decontamination rinsate and soil cutting wastes produced during the investigation will be stored <br /> in appropriately sized containers and analyzed for disposal purposes. Following waste <br /> characterization, the wastes will be disposed of at an off-Site waste disposal facility by a licensed <br /> waste hauler. <br /> 4.2.7 Surveying <br /> Following the installation and development of the new monitoring wells, the northing, easting, <br /> and top of casing for each new well will be surveyed by a California licensed land surveyor. In <br /> addition, the location of soil borings not converted into monitoring wells, if any, will be surveyed <br /> for location and ground surface elevation. <br /> Site Characterization Work Plan 9 June 22,2018 <br />