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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364.9600 FAX(650) 364-9233 <br /> 404 N-Wiset Lane Walnut Creek, CA 94598 (510) 988.9600 FAX (510)988.9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 9219600 FAX(916)921-0 100 <br /> :-:,Blaine Tech Services, Inc. Client Project ID: Chevron 9-0557 /971124-S2 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> :.San Jose, CA 95112 <br /> ,Attention: Fran Thie Work Order#: 9711 G09 -01-04 Reported: Dec 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GC120897BTEX22A GC120897BTEX22A GC120897BTEX22A GC120897BTEX22A GC120897BTEX22A <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: M. Mistry M.Mistry M. Mistry M. Mistry M. Mistry <br /> MS/MSD#: 971205201 971205201 971205201 971205201 971205201 <br /> Sample Conc: 1.1 1.1 1.0 3.2 7.0 <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 12/6/97 12/8/97 <br /> Instrument I.D.#: GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc. Spiked: 10pg/L 10pg/L lopg/L 30pg/L 60ug/L <br /> Result: 9.2 9.9 9.6 28 58 <br /> MS % Recovery: 81 88 86 83 85 <br /> Dup. Result: 9.0 9.6 9.3 237 55 <br /> MSD % Recov.: 79 85 83 779 80 <br /> RPD: 2.2 3.1 3.2 158 5.3 <br /> RPD Limit: 0-25 0-25 0.25 0-25 0-25 <br /> LCS #: BLK120897 BLK120897 BLK120897 BLK120897 BLK120897 <br /> Prepared Date: 12/8/97 12/6/97 12/8/97 12/8/97 12/8/97 <br /> Analyzed Date: 12/8/97 32/8/97 12/8/97 12/8/97 12/8/97 <br /> Instrument I.D.#: GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc. Spiked: 10ug/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> LCS Result: 11 11 11 32 66 <br /> LCS % Recov.: 110 110 110 107 110 <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-free matrix that is analyzed using the same reagents, <br /> S 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. H <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 /> P g Penner <br /> Pro ect Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9711G09.BLA <1> <br />