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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 /> Blaine Tech Services, Inc Client Project ED $hell Stockton/9704111-F2 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9704289-05 Reported Apr 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> CC Batch# GC041397STEX03A GC041397BTEX03A GC041397BTEX03A GC041397BTEX03A GC041397BTEX03A <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 A. Miraftab A. Miraftab A Miraftab A.Miraftab A Miraftab <br /> MS/MSD # 970437205 970437205 970437205 970437205 974437205 <br /> Sample Conc. N 0 N D N D N D N D <br /> Prepared Date 4/13/97 4/13/97 4/13/97 4/13/97 4/13/97 <br /> Analyzed Date 4/13/97 4/13/97 4/13/97 4/13/97 4/13/97 <br /> Instrument I D # GCHP03 GCHP03 GCHP03 GCHP03 GCHP03 <br /> Conc Spiked 10 pg/L 10 pg/L 10 Ng/L 30 Ng/L 60 Ng/L <br /> Result 10 10 10 31 59 <br /> MS % Recovery 100 100 100 103 98 <br /> Dup Result 11 11 11 32 62 <br /> 0 MSD % Recov 110 110 110 107 103 <br /> RPD 95 95 95 32 50 <br /> RPD Limit. 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK041397 BLK041397 BLK041397 BLK041397 BLK041397 <br /> Prepared Date: 4/13/97 4/13/97 4/13/97 4/13/97 4/13/97 <br /> Analyzed Date- 4/13/97 4/13/97 4/13/97 4/13/97 4/13/97 <br /> Instrument I D.# GCHP03 GCHP03 GCHP03 GCHP03 GCHP03 <br /> Conc Spiked 10pg/L 10 ftg/L 10 Ng/L 30 pg/L 60 fig/L <br /> LCS Result: 11 10 10 31 60 <br /> LCS %Recov.. 110 100 100 103 100 <br /> 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 /> S40V IA NALYTICAL `reparation,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 matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> P gg Penner <br /> Pr ct Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9704289 BLA <4> <br />