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CHROMALAB, INC . <br /> 5 DAYS TURNAROUND <br /> Environmental Laboratory(1094) <br /> February 26, 1993 ChromaLab File No. : 0293195 <br /> THE MARK GROUP _ <br /> Attn: Robert S. Spare <br /> RE: Five soil samples for Gasoline and BTEX analysis <br /> Project Name: STOCKTON SCAVENGER ASSOC. <br /> Project Number: 92-1177102 <br /> Date Sampled: Feb. 16, 1993 Date Submitted: Feb. 19, 1993 <br /> Date Analyzed: Feb. 24, 1993 <br /> RESULTS: <br /> Ethyl Total <br /> Sample Gasoline Benzene Toluene Benzene Xylenes <br /> I.D. m K K k K K <br /> B1,B2 N.D. 82 87 8 . 0 30 <br /> E1, E2 3 . 9 N.D.* 71 42 250 <br /> N1,N2 N.D. N.D. N.D. N.D. N.D. <br /> . N3 ,N4 N.D. N.D. N.D. N.D. N.D. <br /> W1,W2 N.D. N.D. N.D. N.D. N.D. <br /> BLANK N.D. N.D. N.D. N.D. N.D. <br /> SPIKE RECOVERY 108% 98% 99% 91% 91% <br /> DUP SPIKE RECOVERY --- 98% 96% 93% 93% <br /> DETECTION LIMIT 1. 0 5. 0 5 . 0 5. 0 5. 0 <br /> METHOD OF ANALYSIS 5030/8015 8020 8020 8020 8020 <br /> * Detection limit= 10 µg/Kg due to dilution needed. <br /> ChromaLab, Inc. <br /> Billy ach Eric Tam <br /> Analy ical Chemist Laboratory Director <br /> do <br /> • <br /> 2239 Omega Road,#1 • San Ramon, California 94583 <br /> (510) 831-1788 0 Facsimile (510) 831-8798 <br />