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680 Chesapeake Drive Redwood CRY CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 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 Bind North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 industrial Road San Carlos,CA 94070-4111 (650)232-9690 FAX(650)232 9612 <br /> Sequoia Analytical Client Project ID S902349/PEG' <br /> 819 Striker Ave, Suite 8 Matrac Liquid <br /> Sacramento, CA 95834 <br /> Attention Sandra R Hanson Work Order# 9903046 Reported Mar 10, 1999 <br /> v v <br /> ' 4 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanoi <br /> QC Batch# G003089918HSHSB GCO308991SHSHSB GC030899[SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method Hs HS HS <br /> Analyst MM MM MIM <br /> MS/MSD# 990304601 990304601 990304601 <br /> Sample Conc N D N D N D <br /> Prepared Date 3/8/99 3/8/99 3/8/99 <br /> Analyzed Date 3/8/99 3/8/99 3/8/99 <br /> Instrument I D.# GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 82 98 99 <br /> �fIS %Recovery 103 123 124 <br /> Dup Result 83 10 10 <br /> MSD%Recov 104 125 128 <br /> RPD- 12 20 10 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS# LCS030899 LCS030899 LCS030899 <br /> Prepared Date 3/8/99 3/8/99 3/8/99 <br /> Analyzed Date 3/8/99 3/8/99 3/8/99 <br /> instrument I.D# GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 85 93 96 <br /> LCS. % Recov . 106 116 120 <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 /> *EGUOIA ANAL ICAL 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 /> avid A IC e e MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Prof Manager 9903046SSS <2> <br />