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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue e Suite LM e Concord, California 94620 <br /> (510) 686-9600 9 FAX (510) 686-9689 <br /> ...................... .... ......... <br /> ...... .. --------- <br /> .................................. .. .... <br /> ........................................ ........ -....................1 ..... . ..... <br /> ............ ...... . ......... . .......... . ............... <br /> :X <br /> !Kaprealian Engineering, Inc. Client Project ID: Unocal, 2835 Navy Drive, Stockton <br /> P.O. Box 996 <br /> ;;`Benicia, CA 94510 <br /> Attention: Mardo Kapreallan, P.E. OC Sample Group: 2040923-927 Reported: Apr 24, 1992 <br /> .... . ... .... .. .. .. <br /> .........N. <br /> . .... .... <br /> . . .............. ........ .. ...... <br /> . . ............ . .......................... <br /> ........... ...... . . . ...... ........................... . . ...... .. ......... .............................. <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> Method: EPAS015 EPAS015 EPAS015 EPAS015 EPAS015 <br /> Analyst: A.T./S.L. A.T./S.L A.T./S.L A T./S.L. A.T./S.L. <br /> Reporting Units: mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg <br /> Date Analyzed: Apr 23, 1992 Apr 23, 1992 Apr 23, 1992 Apr 23, 1992 Apr 23, 1992 <br /> Sample#: 204-0924 204-0925 204-0926 204-0927 Blank <br /> Surrogate <br /> %Recovery: 154 129 122 116 115 <br /> SEQUOIA ANALYTICAL %Recovery: nc.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. + nc.of M.S.D.)7-2 <br /> Laboratory Director 2040923.KEI <5> <br />