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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)3649233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX (916)921-0100 <br /> .................................. <br /> ......... . <br /> X,X, ................... <br /> ............ <br /> ........... <br /> Blaine T'e"c"h Services, Inc. Client Project V. Chevron 9-86" 32 971119-M2 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> Jose, CA 95112 <br /> Fran Thie Work Order#: 9711 C65-06 Reported: Dec 10, 1997;.-",.'. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch* GC120297BTEX21A GC120297BTEX21A GC120297BTEX21A GC120297BTEX21A GC120297BTEX21A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A. Miraftab A.Miraftab A. Miraftab A. Miraftab A. Miraftab <br /> MS/MSD #: 9711A7704 9711A7704 9711A7704 9711A7704 9711A7704 <br /> Sample Cone.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 12/2/97 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Analyzed Date: 12/2/97 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10yg/L 10p91L 10,ugll- 30 pg/L 60,ug/L <br /> Result: 11 11 11 32 64 <br /> MS % Recovery: 110 110 110 107 107 <br /> Dup. Result: 11 11 12 33 65 <br /> MSD %Recov.: 110 110 120 110 110 <br /> RPD: 0.0 0.0 8.7 3.1 3.1 <br /> RPD Limit: 0.25 0-25 0.25 0-25 0-25 <br /> 8. <br /> LCS#: BLK120297 BLK120297 BLK120297 BLK120297 BLK120297 <br /> Prepared Date: 12/2/97 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Analyzed Date: 12/2/97 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone. Spiked: 10 pg/L 10,ugIL 10 jug/L 30pg/L 60 lig/L <br /> LCS Result: 10 10 10 30 59 <br /> LCS %Recov.: 100 100 100 100 98 <br /> MS/USD 60-140 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 /> SE OIA NALYT[CAIL 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 /> Cf r the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Pe y Penner [interference,the LCS recovery is to be used to validate the batch. — <br /> Project Manager MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9711C65.BLA <4> <br />