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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received. 12/18/92 <br /> Project: EMCON Project No OG71-038 01 Service Request No : SJ92-1604 <br /> Arco Facility No. 2168 Sample Matrix- Water <br /> Inorganic Parameters= <br /> mg/L (ppm) <br /> Sample Name MW-2 (53) Method Blank <br /> Date Sampled 12/17/92 <br /> Analyte Method <br /> Total Oil and Grease SM 5520B 5 ND ND <br /> Hydrocarbons, Gravimetric SM 5520F 5 ND ND <br /> MRL Method Reporting lama <br /> ND None Detected at or above the method reporting limrt <br /> SM Standard Methods for the Examination of Water and Wastewater, 17th Ed., 1989 <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, 31 Edition) and Methods for Chemical <br /> Analysis of Water and Waste (EPA-60014-79-020, Revised March 1983) <br /> A".. .dm,." <br /> Approved by: Date: <br /> 2 <br />