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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue e Suite LM a Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> -6 <br /> Kaprealian Engineering, Inc. Client Project ID: Unocal, 601 E-Kettleman, Lodi <br /> :-.P.O. Box 996 <br /> K: <br /> .::Benicia, CA 94510 <br /> X. <br /> !'Attention: Mardo Kapreallan, P.E. OC Sample Group: 2040292-300 Reported: Apr 22, 1992 <br /> U <br /> ........... <br /> .. ... ... .. <br /> .. ......... <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/8020 <br /> Analyst: K.N. K.N. K.N. <br /> Reporting Units: ug/L ug/L ug/L <br /> Date Analyzed: Apr 15, 1992 Apr 15, 1992 Apr 15, 1992 <br /> Sample#: 204-0299 204-0300 Blank <br /> 0 <br /> Surrogate <br /> %Recovery: 86 92 88 <br /> SEQUOIA ANALYTICAL %Recovery* Cone.of M.S.-Cone,of Sample X 100 <br /> Spike Gone.Added <br /> Relative%Difference: Cone.of M.S.-Cone.of M.S.D. X 100 <br /> Belinda C.Vega (Cone.of R.S. + Cone.of M. .D. 7-2 1 <br /> Laboratory Director 204-0-2-92-.REI <4> <br />