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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM • Concord, California 94520 <br /> (510) 686-9066 • FAX (510) 686-9689 <br /> Kapreallan Engineering, Inc Client Project ID Unocal, Stocton, 7303 Pacific Ave Sampled Sep 27, 1991 <br /> P O Box 996 Matrix Descript Water, MW1 Received Sep 27, 1991 <br /> Benicia, CA 94510 Analysis Method SM 5520 B&F (Gravimetric) Extracted Oct 3, 1991 <br /> Attention Mardo Kaprealian, P E First Sample # 109-2165 Analyzed Oct 7, 1991 <br /> Reported Oct 17, 1991 <br /> TOTAL RECOVERABLE PETROLEUM OIL <br /> Sample Sample Oil & Grease <br /> Number Description mg/L <br /> (ppm) <br /> 109-2165 navel N D <br /> i <br /> I <br /> Detection Limits 50 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL <br /> Belinda C Vega <br /> Laboratory Director <br /> 1092165 KEl <3> <br />