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CHROMALAB, INC. <br /> 5DAYS TURNAROUND <br /> Environmental Laboratory(1094) <br /> October 2 , 1992 ChromaLab File No. : 0992271 <br /> MITTELHAUSER CORPORATION <br /> Attn: Roger W. Papler <br /> RE: Three soil samples for (WET) Barium, Chromium, Lead and <br /> Nickel analyses <br /> Project Name: DIAMOND PROPERTIES/TRACY <br /> Project Number: 2062-01 <br /> Date Sampled: Sept. 24 , 1992 Date Submitted: Sept. 24, 1992 <br /> Date Extracted: Oct. 1, 1992 Date Analyzed: Oct. 1, 1992 <br /> RESULTS: <br /> Sample I.D. Barium Chromium Lead Nickel <br /> I•D• (ma/L) (mg/L) (mo/L) (ma/L) <br /> 2062-1 0. 22 N.D. 0. 02 0. 02 <br /> 2062-2 0.74 N.D. N.D. N.D. <br /> 2062-3 0. 74 N.D. 0. 38 N.D. <br /> BLANK N.D. N.D. N.D. N.D. <br /> SPIKED RECOVERY 110% 100% 108% 120% <br /> DUPLICATE SPIKED RECOVERY 92% 100% 90% 100% <br /> DETECTION LIMIT 0. 005 0. 01 0. 010 0. 020 <br /> METHOD OF ANALYSIS WET/3050/6010/7000 <br /> ChromaLab, Inc. <br /> Refaat A. Mankarious Eric Tam <br /> Analytical Chemist Laboratory Director <br /> 2239 Omega Road, #1 • San Ramon, California 94583 <br /> 510/831-1788 • Facsimile 510/831-8798 <br /> Federal ID #68-0140157 <br />