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X40 Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> ` 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(51o)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Iwo <br /> i <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 980210-Ai <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802737 -01-02, 04-05, 07 Reported Feb 27, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol lso-Propanol <br /> QC Batch# GCO213981SHSHSA GCO213981SHSHSA GCO213981SHSHSA <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 980237501 980237501 980237501 <br /> Sample Conc N D N D N D <br /> Prepared Date 2/13/98 2/13/98 2/13/98 <br /> Analyzed Date 2/13/98 2/13/98 2/13/98 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 62 69 72 <br /> MS % Recovery 78 86 90 <br /> 40 Dup Result 58 67 66 <br /> MSD % Recov 73 84 83 <br /> RPD 67 29 87 <br /> RPD Limit 0-50 0-50 0-50 <br /> i <br /> LCS # BLK021398 ELK021398 BLK021398 <br /> Prepared Date 2/13/98 2/13/98 2/13/98 <br /> Analyzed Date 2/13/98 2/13/98 2/13/98 <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 68 73 71 <br /> LCS % Recov 85 91 89 <br /> 50-150 50-150 50-150 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> tjiecThe LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> O A ALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortifier[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 /> t <br /> nner <br /> Manager **MS=Matrix Spike,MSD=MS Duplicate,RPO=Relative%Difference 9802737 BLA <1> <br />