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r / \ Sequoia 680 Chesapeake Dnve 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 9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ;Blaine Tech Services,Inc Client Project Ili{'Chevron 9-8264/970107-Z2 <br /> '1680 Rogers Avenue Matrix Liquid <br /> Sart Jose, CA 95112 <br /> c Attention Fran Thie Work Order# 9701261-01 Reported Jan 16, 1997{ <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GCO10897BTEX17A GC010897BTEX17A GCO10897BTEX17A GCO10897BTEX17A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method- EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst' A.Miraftab A.Miraftab A Miraftab A.Miraftab <br /> MS/MSD #: 970111-17404 97011-17404 97011-17404 97011-17404 <br /> Sample Conc : N D N D N D N D <br /> Prepared Date 1/8/97 1/8/97 1/8/97 1/8/97 <br /> Analyzed Date 1/8/97 1/8/97 1/8/97 1/8/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> Result- 98 95 94 27 <br /> 0 MS % Recovery. 98 95 94 90 <br /> Dup. Result 98 92 93 28 <br /> MSD % Recov : 98 92 93 93 <br /> RPD. 00 32 11 36 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK010897 ELK010897 BLK010897 BLK010897 <br /> Prepared Date: 1/8/97 1/8/97 1/8/97 1/8/97 <br /> Analyzed Date 1/8/97 1/8/97 1/8/97 1/8/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> LCS Result: 84 83 82 24 <br /> LCS % Recov : 84 83 82 80 <br /> 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 1s a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br />. I 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 matrixry <br /> interference,the LCS recoveis to be used to validate the batch <br /> tyroject <br /> nner <br /> Panagerr **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9701261 BLA <3> <br /> aa <br />