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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM e Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> 0Kaprealian Engineering, Inc Client Project ID Unocal#5421,7303 Pacific Ave ,Stockton Sampled 11/9&11/10/92 <br /> 2401 Stanwell Drive, Suite 400 Matrix Descript Water Received Nov 11, 1992 <br /> Concord, CA 94520 Analysis Method SM 5520 B&F (Gravimetric) Extracted Nov 18, 1992 <br /> Attention Mardo Kaprealian, P E First Sample # 211-0458 Analyzed Nov 20, 1992 <br /> Reported Nov 24, 1992 <br /> TOTAL RECOVERABLE PETROLEUM OIL <br /> Sample Sample Oil & Grease <br /> Number Description mg/L <br /> (ppm) <br /> 211-0458 EB 3 N D <br /> 211-0459 E B 4 N D <br /> Detection Limits 5 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL <br /> s <br /> co Chie o <br /> Project Manager 2110456 K=i <3> <br />