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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) 988.9600 FAX(510)988-%73 <br /> Analytical 819 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Blaine Tech Services, Inc. Client Project ID: Chevron 9-0657 970520-H1 <br /> 1680 Rogers Avenue Matrix: Liquid <br /> San Jose, CA 95112 <br /> ..?.Attention: Fran Thie Work Order#: 9705B17-03-04, 06 Reported: Jun S. 1997- <br /> "x- x <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GC052397BTEX03A G0052397BTEX03A GCO5239713TEX03A GC052397STEYMA GC0523978TEX03A <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: D.Jirsa D.Arsa D.Jirsa D.Jima D.Jirsa <br /> MS/MSD #: 970549101 970549101 970549101 970549101 970549101 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 5/23/97 5/23/97 5/23/97 5/23/97 5/23/97 <br /> Analyzed Date: 5/23/97 5/23/97 5/23/97 5/23/97 5/23/97 <br /> Instrument I.D.#: GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc. Spiked: 10pg/L 10pg/L 10pg/L 30 pg/L 60 pg/L <br /> Result: 10 10 11 33 48 <br /> MS % Recovery: 100 100 110 110 80 <br /> Dup. Result: 9,7 9.9 9.9 31 45 <br /> MSD % Recov.: 97 99 99 103 75 <br /> RPD: 3.0 1.0 11 6.3 6.5 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> .. . .... <br /> .......... ..... <br /> ... ........ . . . ....... .......... ..... <br /> ........ .......... .. .......... <br /> . ............ .... <br /> -R, <br /> 1: ;: . ................. .. ....... <br /> LCS #: BLK052397 BLK052397 BLK052397 BLK052397 BLK052397 <br /> Prepared Date: 5/23/97 5/23/97 5/23/97 5/23/97 5/23/97 <br /> Analyzed Date: 5/23/97 5/23/97 5/23/97 5/23/97 5/23/97 <br /> Instrument 1.134: GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc. Spiked: 10.ug/L 101ig/L 101ig/L 30pg/L 60 pg/L <br /> LCS Result: 9.8 9.8 9.9 30 45 <br /> LCS %Recov.: 98 98 99 100 75 <br /> MS/MSD 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 /> OE NAILYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> fortified with known quantifies 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 /> l interference,the LCS recovery is to be used to validate the batch. <br /> P Per <br /> Manager <br /> Pr ct Manager MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9705B17.BLA 43> <br />