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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988-%73 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 980129-S1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9801 H79-01-06, 08-09, Reported Feb 13, 1998 <br /> 9801 H81-01 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GCO203981SHSHSA GCO203981SHSHSA GCO203981SHSHSA <br /> Analy Method ISHS EPA 8020 EPA 8020 <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 9801C9301 9801C9301 9801C9301 <br /> Sample Conc N D N D N D <br /> Prepared Date 2/3/98 2/3/98 2/3/98 <br /> Analyzed Date 2/3/98 2/3/98 2/3/98 <br /> Instrument I D # GCV1 GCv1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 61 67 65 <br /> MS % Recovery 76 84 81 <br /> Dup Result 57 62 60 <br /> IDISâť‘ % Recov 71 78 75 <br /> RPD 68 78 80 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK020398 ELK020398 BLK020398 <br /> Prepared Date 2/3/98 2/3/98 2/3/98 <br /> Analyzed Date 2/3/98 2/3/98 2/3/98 <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 67 71 71 <br /> LCS % Recov 84 89 89 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> Please Nate <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SU A A YTICAL 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 /> P 7e y nerinterference,the LCS recovery is to be used to validate the batch <br /> Pe y ner <br /> Prod t anger **MS=Matrix Spike MSD=MS Duplicate, RPD=Relative% Difference 9801H79 BLA <5n <br />