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SEQUOIA� A ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> M-West Client Project 11) #1572 01/Catellus, Stockton Sampled Mar 5, 1993 <br /> 1777 Botelho Dr, Ste 260 Sample Matrix Water Received Mar 5, 1993 <br /> Walnut Creek, CA 94596 Analysis Method EPA 5030/8015/8020 Reported Mar 17, 1993 <br /> Attention Bruce Pfaff First Sample # 303-0207 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br />' Reporting Sample Sample Sample Sample Sample <br /> Analyte Limit I D. I D. I D. I D. I D. <br />' Mg/L 303-0207 303-0208 303-0209 303-0210 303-0211 <br /> MW 2A MW 3A MW 4A Feld Blank Trip Blank <br /> Purgeable <br />' Hydrocarbons 50 N D N D N D N D N D <br />' Benzene 0 5 N D N D N D N D N D <br /> Toluene 05 ND ND ND ND ND <br /> Ethyl Benzene 0 5 N D N D N D N D N D <br /> W Total Xylenes 0 5 <br /> YI ND ND ND ND ND <br /> Chromatogram Pattern <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 10 10 10 10 <br /> Date Analyzed 3/9/93 3/10/93 3/9/93 3/9/93 3/9/93 <br /> instrument ldentdication HP-5 HP-4 HP-5 HP-5 HP-5 <br />' Surrogate Recovery, % 114 101 107 119 108 <br /> (QC Limits = 70-1309'x) <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 /> EQUOIA ANALYTICAL <br /> t� <br />' Kenneth K F Lee <br /> Laboratory Director 3030201 ERM <2,- <br />