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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 9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 971 9600 FAX(916)921 4100 <br /> v wry:nry,v it L•v{•r r l{v r }ti rr}iv LiOS{ n �" " r a ra v r r ,fi, } A h rr r , to nr L r r ~ t i nv v r a} <br /> Blalne Tech Services,lnc' A Tient ProjectrlD h Chevron 9-8632 /'970107-Zi <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> ',Attention Fran Thie Work Order# 9701571-01 Reported Jan 23, 1997,, <br /> {QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> CSC Batch#: GCO11497BTEX17A GCO11497BTEX17A GCo11497BTEX17A G0011497BTEX17A <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. Miraffab k Miraftab A Miraftab <br /> MS/MSD# 970147906 970147906 970147906 970147906 <br /> Sample Conc • N D N D N D N D <br /> Prepared Date: 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Analyzed Date 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Instrument I D #, GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked. 10pg/L 10pg/L 10pg/L 30pg/L <br /> Result 99 96 96 29 <br /> MS% Recovery 99 96 96 97 <br /> iDup Result* 99 97 97 29 <br /> MSD % Recov 99 97 97 97 <br /> RPD. a0 10 10 00 <br /> RPD Limit: 0-25 0.25 0-25 0-25 <br /> LCS #: BLK011497 BLKW 1497 BLK011497 BLK011497 <br /> Prepared Date 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Analyzed Date. 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Instrument I D #, GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked: 10pg/L 10pg/L 10ug/L 30Pg/L <br /> LCS Result. 8 8 8 8 8 8 26 <br /> LCS %Recov .. 88 88 88 87 <br /> 60-140 60-140 60-140 6D-140 <br /> LCS 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 /> 4pg <br /> IAA LYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> 0fortified 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 /> enn <br /> Manager MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9701571 BLA <2> <br />