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/ SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> WWW (510) 686-9600 FAX (510) 686-9689 <br /> Kapreahaii Engineering, Inc Client Project ID Unocal#5421,7W3 Pacific Ave,Stockton Sampled 11/9&11/10/92 <br /> 2401 Stanwell Drive, Suite 400 Matrix Descript Sall Received Nov 11, 1992 <br /> Concord, CA 94520 Analysis Method SM 5520 E&F (Gravimetric) Extracted Nov 17, 1992 <br /> Attention Mardo Kaprealian, P E First Sample# 211-0494 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 /> 211-0494 EB3-(55) N D <br /> 211-0495 EB3-(58) N D <br /> 211-0496 EB4-(5) N D <br /> f <br /> 211-0497 EB4-(10) N D <br /> 211-0498 EB4-(15) N D <br /> 211-0499 EB4-(20) N D <br /> 211-0500 EB4-(25) N D <br /> 211-0501 EB4-(30) N D <br /> 211-0502 EB4-(35) N D <br /> 211-0503 EB4-(40) N D <br /> Detection Limits 30 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> ;SEQUOI <br /> A;LaYTIAL <br /> Project Manager 2110502 KEi <15> <br />