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`•1 !n (r' <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415)364 9233 <br /> 404 N Waget 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 /> *mL Client Project ID #W5-11-0406 <br /> 4080 Pike Lane, Ste C Matrix Liquid <br /> Concord, CA 94520 <br /> Attention Justin Ward QC Sample Group 5111924-1926 Reported Nov 30, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC112995 GC112995 GC112995 GC112995 <br /> 802009A 802009A 802009A 802009A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst M Creusere M Creusere M Creusere M Creusere <br /> MS/MSD# 5112249 5112249 5112249 5112249 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 11/29/95 11/29/95 11/29/95 11/29/95 <br /> Analyzed Date 11/29/95 11/29/95 11/29/95 11/29/95 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 <br /> Cone Spiked 20pg/L 20pg/L 20u9/L 60pg/L <br /> Result 21 22 22 72 <br /> MS % Recovery 105 110 110 120 <br /> . Dup Result 21 22 21 71 <br /> MSD % Recov 105 110 105 118 <br /> RPD 00 00 47 14 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # 4LCS112995 4LCS112995 41-CS112995 41-GS112995 <br /> Prepared Date 11/29/95 11/29/95 11/29/95 11/29/95 <br /> Analyzed Date 11/29/95 11/29/95 11/29/95 11/29/95 <br /> Instrument I D # HP-9 HP-9 HP-9 HP-9 <br /> Cone Spiked 20yg/L 20)tg/L 20pg/L 60Ng/L <br /> LCS Result 18 18 18 60 <br /> LCS %Recov 88 90 90 99 <br /> LCS 71-133 72-128 72-130 71-120 <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 QFLWIMer <br /> LYTICAL, #1271 preparation,and analytical methods employed for the samples The matrix spike 1s 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 matrix <br /> interference,the LCS recoveryis to be used to validate the batch <br /> Ke **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Projr <br /> 5111924 GTL <37 <br />