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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client: EMCON Associates Date Received: 09/02/93 <br /> Project: ARCO Project No OG71-038 01 Service Request No SJ93-1 101 <br /> ARCO Facility No 2168 Sample Matrix. Water <br /> Inorganic Parameters' <br /> mg/L (ppm) <br /> Sample Name MW-2 (531 Method Blank <br /> Date Sampled 09102193 <br /> EPA <br /> Analyte Method MRL <br /> Total Oil and Grease SM 5520C 0 5 10 NO <br /> Hydrocarbons, IR SM 5520F 0 5 9 0 NO <br /> ' Unless otherwise noted, all analyses were performed within EPA recommended maximum holding times <br /> specified in Test Methods for Evaluating Solid Waste, (SW-846, 3"Edition) and Methods for Chemical <br /> Analysis of Water and Waste (EPA-600/4-79-020, Revised March 1983) <br /> Approved by Date <br />