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I,Z4 ,SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> <» ::: » ;:; ... ...`.. <br /> : : <br /> :: :.....: ....... . .......... <br /> Kaprealian Iient Project ID Unocal,2835 Navy Drive, Stockton ......................... <br /> P.O. Box 996 <br /> Benicia,CA 94510 <br /> ::::.Attention: Mardo Kaprealian,P.E. OC Sample Group: 2040923-927 Reported: Apr 24, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> EPA EPA EPA EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/8020 8015/8020 8015/8020 8015/8020 EPAS015 <br /> Analyst: K.N. K.N. K.N. K.N. K.N. K.N. A T./S.L <br /> Reporting Units: mg/Kg mg/Kg, mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg <br /> Date Analyzed: Apr 22, 1992 Apr 22, 1992 Apr 22, 1992 Apr 22, 1992 Apr 22, 1992 Apr 22, 1992 Apr 23, 1992 <br /> Sample#: 204-0923 204-0924 2044)925 204-0926 204-0927 Blank 204-0923 <br /> Surrogate <br /> %Recovery: 86 87 87 83 88 90 122 <br /> SEQUOIA ANALYTICAL %Recovery: Cone.of M.S.-Cone.of Sample x 100 <br /> Spike Cone.Added <br /> Relative%Difference: Cone.of M.S.-Cone.of M.S.D. x 100 <br /> Belinda C.Vega (Cone.of M.S. + Cone.of M. .D. 2 <br /> Laboratory Director 2040923. <4> <br />