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1A14A%L1 I MoIAL <br /> 1900 Bates Avenue `Suite LM - Concord, California 94520 <br /> (510) 686- 510► 68(3-9689 <br /> 0 5 <br /> E T ST n v i r o n m e m"ia'I A's"s"bic i a t e s e P'rb"I'e"c'...t'Ib"' 06 <br /> P.O. Box 2242 <br /> ,-..Merced, CA 95344 <br /> Attention: Dan Anderson QC Sample Group: 2050253-262 Reported: May 28, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Trichloro- Chloro- w <br /> 1,1-Dichlorcethene athene benzene <br /> Method: EPA 8010 EPA 8010 EPA 8010 <br /> Analyst: M.Nguyen M.Nguyen M.Nguyen <br /> Reporting Units: ug/Kg ug/Kg ug/Kg <br /> Date Analyzed: May 13, 1992 May 13, 1992 May 13, 1992 <br /> OC Sample #: Matrix Blank Matrix Blank Matrix Blank <br /> Sample Cone.: N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 10 10 10 <br /> Cone. Matrix <br /> Spike: 9.3 11 9.4 <br /> L. <br /> Matrix Spike <br /> %Recovery: 93 110 94 <br /> Conc. Matrix <br /> Spike Dup.: 8.9 10 9.5 <br /> �F <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 89 100 95 <br /> Relative <br /> %Difference: 4.4 9-5 1.0 <br /> IS <br /> Quality Assurance Statement:All standard operating procedures and quality control requirements have been met. <br /> it <br /> h <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc:of Sample X 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.'�Conc.of M.S.D. x 100 <br /> Karen C�ns'iirom (Conc.of M.S. 7.Conc.of M.S.D.) 2 205n253-ETS <19> <br /> Project Manager <br />