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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LIM P Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> 10Kapreallan Engineering, Inc Client Project 1D Unocal#5421,7303 Pacific Ave ,Stockton Sampled Nov 10, 1992 <br /> 2401 Stanwell Drive, Suite 400 Matrix Descnpt Soil Received Nov 11, 1992 <br /> Concord, CA 94520 Analysis Method SM 5520 E&1= (Gravimetric) Extracted Nov 17, 1992 <br /> Attention Mardo Kaprealian, P E First Sample# 211-0504 Analyzed Nov 20, 1992 <br /> Reported Nov 25, 1992 <br /> TOTAL RECOVERABLE PETROLEUM OIL <br /> Sample Sample Oil & Grease <br /> Number Description mg/kg <br /> (ppm) <br /> 211-0504 EB4-(45) N D <br /> 211-0505 EB4-(50) N D <br /> 211-0506 EB4-(55) N D <br /> 211-0507 EB4-(58 5) N D <br /> 211-0508 EB5-(4) N D <br /> 211-0509 EB5-(7) N D <br /> 211-0510 E35-(9 5) N D <br /> 211-0511 EB6-(4) N D <br /> 211-0512 EB6-(7) N D <br /> 211-0513 EB6-(9 5) N D <br /> Detection Limits 30 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> 674©U ANALYTICAL <br /> Scott A ieffo <br /> Project Manager 2110502 KE' < <br />