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6S0 Chesapeake Drive Redwood City, CA 94063 (650) 364.9600 FAX (650)364-9233 <br /> Sequoia <br /> 404 N 11/iget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510) 988.9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 911-9600 FAX (916)92 1-0 100 <br /> Blaine Tech Services, Inc. Client Project ID: Chevron 9-0557 / 971 124-S2 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> :San Jose, CA 95112 <br /> ::Attention: Fran Thie Work Order#: 9711 G09-05 Reported: Dec 22 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Xylenes <br /> Gas <br /> Analyte: Benzene Toluene Ethyl X Y <br /> Benzene <br /> CC Batch#: GC120897BTEXoIA GC120897BTEX01A GC120897BTEXOIA GC120897STEX01A GGIEPA80 5M01A <br /> Anaiy. Method: EPA 8020 EPA 8020 EPA8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: C.Demartini C. Demartini C. Demartini C. Demartini <br /> C. Demartini <br /> MS/MSD #: 971205202 971205202 971205202 971205202 971205202 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D, <br /> Prepared Date: 12/8/97 12/8/97 12/8/97 12/8/97 12/8/97 <br /> Analyzed Date: 12/8/97 12/8/97 12/8/97 12/8/97 12/8/97 <br /> Instrument I.D.#: GCHP1 GCHPI GCHPI GCHPI GCHP1 <br /> Conc. Spiked: 10pg/L 101ig/L 10Ng/L 30jig/L 60,ug/L <br /> Result: 9.0 9.1 11 30 61 <br /> MS % Recovery: 90 91 110 100 102 <br /> • Dup. Result: 7.2 7.6 8.0 24 48 <br /> MSD % Recov.: 72 76 80 80 80 <br /> RPD: 22 18 32 22 24 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS#: BLK120897 BLK120B97 BLK120897 BLK120897 BLK120897 <br /> Prepared Date: 12/8/97 12/8/97 1218/97 1218/97 12/8/97 <br /> Analyzed Date: 12/8/97 12/8/97 12/8/97 12/8/97 12/8/97 <br /> Instrument I.D.#: GCHPI GCHPI GCHP1 GCHP1 GCHP1 <br /> Conc. Spiked: 10ug/L 10}tg/L 10pg/L 30pg/L 60}tg/L <br /> LCS Result: 8.2 816 9.2 28 57 <br /> LCS % Recov.: 82 86 H2 93 95 <br /> B0-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70.130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note: <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQU A NALYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure. If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch. <br /> g enner <br /> P Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9711 G09 �2� <br />