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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 9BB-9600 FAX(510)988-9673 <br /> Analytical 814 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100 <br /> 1 <br /> 8 iilh 6 Tech fi,8 er"v"1 be"'s'*, Inc. Client Project ID: Chevron 9�b661961106-Hl <br /> Timothy Drive Matrix: Liquid <br /> .-.,-San Jose, CA 95133 <br /> : . <br /> -Attention: Jim Keller Work Order#: 9611305 01-08 ReportedNov 24, 19961--'. <br /> .... ....... <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC110896BTEX07A GC110896BTEX07A GC110896BTEX07A GC110896BTEX07A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prop. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A. Porter A.Porter A. Porter A. Porter <br /> MS/MSD#: 961126102 961126102 961126102 961126102 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Analyzed Date: 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result: 10 10 11 32 <br /> • MS % Recovery: 110 110 110 107 <br /> Dup. Result: 11 11 11 33 <br /> MSD % Recov.: 110 110 110 110 <br /> RPD: 9.5 9.5 0.0 3.1 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> ...................... <br /> -x. x <br /> LCS #: BLK110896 BLK110896 BLK110896 BLK110896 <br /> Prepared Date: 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Analyzed Date: 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Instrument LID*: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 10 ug/L loug/L 10 ug/L 30 ug/L <br /> LCS Result: 10 11 11 33 <br /> LCS % Recov.: 100 110 110 110 <br /> MS71VISD 60-140 60-140 60-140 60-140 <br /> LCS 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 /> SEQUOIA ANALYTICAL 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. It <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> linterference,the LCS recovery is to be used to validate the batch. <br /> eggy Penn <br /> Project Man er MS=Matrix Spike,MSD=M$Duplicate,RPD=Relative%Difference 9611305.BLA -:f3> <br />