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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 Striker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Smith Environmental Client Project ID 14650, 94-36711-10 <br /> .1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 9704594-01, 02, 03, 04, 06 Reported Apr 23, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC041897BTE)(03A GC041897BTEX03A GC041897BTEX03A GC041897BTEX03A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method 5030 5030 5030 5030 <br /> Analyst D Jima D Jirsa D Jirsa D Jirsa <br /> MS/MSD# 9704396-08 9704396-08 9704396-08 9704396-08 <br /> Sample Conc, N D N D N D N D <br /> Prepared Date 4/18/97 4/18/97 4/18/97 4/18/97 <br /> Analyzed Date 4/18/97 4/18/97 4/18/97 4/18/97 <br /> Instrument I D # GCHP-3 GCHP-3 GCHP-3 GCHP-3 <br /> Conc Spiked 10Ng/L 10frg/L 10pg/L 30Mg/L <br /> Result 11 11 11 34 <br /> MS% Recovery 110 110 110 113 <br />• Dup Result 11 11 11 34 <br /> MSD % Recov. 110 110 110 113 <br /> RPD 0 0 0 0 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK041897A BLK041897A ELKG41897A BLK041897A <br /> Prepared Date 4/18/97 4/18/97 4/18/97 4/18/97 <br /> Analyzed Date 4/18/97 4/18/97 4/18/97 4/18/97 <br /> Instrument I D # GCHP-3 GCHP-3 GCHP-3 GCHP-3 <br /> Conc Spiked 10ug/L long/L 10ug/L 30pg/L <br /> LCS Result. 11 11 11 33 <br /> LCS% Recov. 110 110 110 110 <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 is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br />. SEQUOIA NALYTICAL preparation,and analyticai methods employed for the samples The matrix spike is an aliquot of sample <br /> r 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 /> Sheila Flynn <br /> r <br /> Project Maria **MS=Matrix Spike,MSD=IVIS Duplicate,RPD=Relative%Difference 9704594 SSS <2> <br />