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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(658)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 industrial Road San Carlos, CA 94070-4111 (650)232 9600 FAX(650)232-9612 <br /> Sequoia Analytical -San Carlos Client Project ID L904208 <br /> 1551 Industrial Road Matrix Liquid <br /> San Carlos CA 94070 <br /> Attention M Gregory Work Order# 9904794 01-10, 21 Reported May 3, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> OC Batch# GC042299ISHSHSB GC0422991SHSH8B GCO422991SHSHSB <br /> Analy Method ISHS ISHS ISMS <br /> Prep Method HS HS HS <br /> Analyst M M M M M M <br /> MS/MSD # 990479403 990479403 990479403 <br /> Sample Conic ND ND ND <br /> Prepared Date 4/22/99 4/22/99 4/22/99 <br /> Analyzed Date 4/22/99 4/22/99 4/22/99 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Cone Spiced 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 85 99 96 <br /> MS % Recovery 106 124 120 <br /> Dup Result 86 96 99 <br /> MSD % Recov 108 120 124 <br /> RPD 12 31 31 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # LCSO42299 LCSO42299 LCSO42299 <br /> Prepared Date 4/22/99 4/22/99 4/22/99 <br /> Analyzed Date 4/22/99 4/22/99 4/22/99 <br /> Instrument I D #, GCV1 GCV1 GCV1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 83 95 96 <br /> LCS % Recov 104 119 120 <br /> 50-150 50-150 50-150 <br /> LCS 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 /> SEQUQI ;NALYTICAL 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 /> h the recovery of analytes from the matrix spike does not tail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Kayvan�Kimy I <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9904794 SSS <1> <br />