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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Shite LM a Concord, California 94520 <br /> (510) 686-9600 0 FAX (510) 686-9689 <br /> �aprealian Engineering, Inc Client Project ID Unocal, 601 E Kettleman Lane, Lodi Sampled Mar 26, 1993 <br /> 2401 Stanwell Dr, Ste 400 Sample Matrix Water Received Mar 26, 1993 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Mar 30, 1993 <br /> Attention Mardo Kaprealian, P E First Sample # 303-1212 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limrt 10 1 D I D I D I D I D <br /> pg/L 303-1212 303-1213 303-1214 303-1215 303-1216 303-1217 <br /> MW 1 MW 2 MW 3 MW 4 MW 5 MW 6 <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D N D N D <br /> Benzene 05 N D N D N D N D N D N D <br /> Toluene 05 N D N D N D N D N D N D <br /> Ethyl Benzene 05 N D N D N D N D N D N D <br /> • Total Xylenes 05 N D N D N D N D N D N D <br /> Chromatogram Pattern -- -- - -- <br /> Quality <br /> -Quality Control Data <br /> Report Limit Multiplication Factor 10 10 10 1 0 1 0 1 0 <br /> Date Analyzed 3/29/93 3/29/93 3/29/93 3/29/93 3/29/93 3/29/93 <br /> Instrument Identification HP-5 HP-5 HP-5 HP-5 HP-5 HP-5 <br /> Surrogate Recovery, % 125 124 122 128 120 116 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> •EQU IA ANALYTICAL <br /> colt A Wo <br /> Project Manager 3031212 KEi <1> <br />