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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM e Concord, California 94520 <br /> (415) 686-9600 0 FAX (415) 686-9689 <br /> Kaprealian Engineering, Inc Client Project ID Unocal, 7303 Pacific Ave, Stockton Sampled Jun 26, 1991 <br /> P O Box 9% Matrix Descript Water Received Jun 26, 1991 <br /> Benicia, CA 94510 Analysis Method SM 5520 B&F (Gravimetric) Extracted Jul 2, 1991 <br /> Attention Mardo Kaprealian, P E First Sample# 106-0740 D Analyzed Jul 2, 1991 <br /> Reported Jul 11, 1991 <br /> TOTAL RECOVERABLE PETROLEUM OIL <br /> Sample Sample Oil& Grease <br /> Number Description mg/L <br /> (ppm) <br /> 106-0740 D Mwi N D <br /> i <br /> Detection Limrts 50 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> OQUOIA ANALYTICAL <br /> Belinda C Vega <br /> ' <br /> g <br /> Laboratory Director 1060740 KEI <6> <br />