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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 6) 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Susie 8 Sacramento,CA 95834 (916) 921 %00 FAX(916)921 0100 <br /> ;jBlalne Tech Services, Inc Client Project ID "She I Stockton /970822,14 r <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 if <br /> 14'Attention Fran Thie Work Order# 9708D38-04 Reported Sep 8, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#. GCO82797BTEX17A GC082797STEX17A GCO82797BTEX17A GC082797BTB(17A GCO82797BTE)(17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA S015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. X Miraftab A Miraftab A Miraftab X Miraftab A.Miraftab <br /> MS/MSD# 970SB3606 970883606 9708B3606 97OSS3606 970883606 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date. 8/27/97 8/27/97 8/27/97 8/27/97 8/27/97 <br /> Analyzed Date 8/27/97 8/27/97 8/27/97 8/27/97 8/27/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10yg/L 10yg/L 10 ftg/L 30pig/L 60 jig/L <br /> Result 84 85 85 25 57 <br /> MS %Recovery 84 85 85 83 95 <br /> 4) Dup Result- 85 86 87 25 57 <br /> MSD % Recov 85 86 87 83 95 <br /> RPD- 12 12 23 00 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS #' BLK082797 BLK082797 BLK082797 BLK082797 BLK082797 <br /> Prepared Date 8/27/97 8/27/97 8/27/97 8/27/97 8/27/97 <br /> Analyzed Date: 8/27/97 8/27/97 8/27/97 8/27/97 8/27/97 <br /> Instrument I D.#- GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10ug/L 10pg/L 10 jig/L 30pg/L 60 jig/L <br /> LCS Result: 85 8-5 86 25 57 <br /> LCS % Recov.: 85 85 86 83 95 <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 /> 4JEO I A ALYTICAL 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 matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> 99 enner <br /> Pr ct Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9708D38 BLA <3> <br />