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• C. DRILLING, DECONTAMINATION, AND ABANDONMENT PROCEDURES <br /> 1. DRILLING PROCEDURE <br /> A C-57-licensed drilling contractor will be retained to drill the exploratory <br /> borings and obtain soil samples. The borings will be drilled using 8-inch <br /> outside-diameter hollow-stem augers. A registered geologist will open the split <br /> spoons, examine the sample, record findings, and prepare the sample for <br /> analysis. <br /> 2. DECONTAMINATION PROCEDURES <br /> All drilling and sampling equipment will be steam-cleaned prior to use on-site. <br /> Equipment will be cleaned in the field using a dilute Alconox (non-phosphate) <br /> wash followed by a double tap water rinse. The used wash water will be held on <br /> site in a closed top drum until appropriate disposal methods have been <br /> determined. The wash water will be disposed of according to all applicable <br /> federal, state, and local regulations. <br /> 3. BORING ABANDONMENT <br /> Upon completion, exploratory borings will be abandoned by filling the boring <br /> with a cement and bentonite slurry. The slurry will be placed from the bottom <br /> up using a tremie hose. <br /> D. METHODS TO SCREEN SOIL SAMPLES FOR PETROLEUM HYDROCARBONS <br /> Because this workplan is for a preliminary subsurface investigation of a former plating <br /> and stamping shop, and because there have been no known activities involving <br /> underground storage of petroleum hydrocarbons, soil will not be screened during drilling <br /> for petroleum hydrocarbons. Neither on-site aeration nor bioremediation are anticipated <br /> for this project. <br /> E. SECURITY MEASURES <br /> There is a locked 6 foot high chain-link fence surrounding the three sides of the site. <br /> The southern perimeter is secured by the Shinko office building and operations area. <br /> III. PLAN FOR DETERMINING GROUNDWATER CONTAMINATION <br /> The following section describes the plan for the preliminary investigation of groundwater <br /> contamination. Because there is no access to domestic wells on site, there will be no well <br /> sampling. <br /> 6 <br /> ERICKSON, Inc. <br /> Specialized Service to Industry Since 1942 <br />