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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364.9233 <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 /> Blaine Tech Services, Inc. Client Project ID: Chevron 9-8632 /970902-F2 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> San Jose, CA 95112 <br /> Attention: Fran Thie Work Order#: 9709126-02-04, 06 Reported: Sep 17, 1997::;:; <br /> 01. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#: GCO90897BTEX21A GC090897BTEX21A GC090897BTEX2IA GCO90897BTEX21A GC090897BTEX2IA <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 #: 970905002 970905002 970905002 970905002 970905002 <br /> Sample Conc.: N.D. N.D, N.D. N.D. N.D. <br /> Prepared Date: 9/8/97 9/8/97 9/8/97 9/8/97 9/8/97 <br /> Analyzed Date: 9/8/97 9/8/97 9/8/97 9/8/97 9/8/97 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10pg/L 10p9/L 10pg/L 30pg/L 60pg/L <br /> Result: 9.9 9.7 9.6 29 53 <br /> MS % Recovery: 99 97 96 97 88 <br /> Dup. Result: 10 9.7 9.6 28 53 <br /> MSD % Recov.: 100 97 96 93 88 <br /> RPD: 1.0 0.0 0.0 3.5 0.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: BLK090897 BLK090897 BLK090897 BLK090897 BLK090897 <br /> Prepared Date: 9/8/97 9/8/97 9/8/97 9/8/97 9/8/97 <br /> Analyzed Date: 9/8/97 9/8/97 9/8/97 9/8/97 9/8/97 <br /> Instrument I.D.#: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked: 10pg/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> LCS Result: 8.8 8.7 8.6 25 47 <br /> LCS % Recov.: 88 87 86 83 78 <br /> 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-tree matrix that is analyzed using the same reagents, <br /> S A 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. 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 /> eg a er <br /> r ect Manager MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9709126.BLA <3n <br />