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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)988-9673 <br /> � Analytical 819 Sinker Avenue Suite S Sacramento CA 95834 (915)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Cambria Client Project ID Shell 2494 E Fremont <br /> 270 Perkins Avenue Matrix Solid <br /> Sonoma, CA 95476 <br /> Attention Jae Neely Work Order# 9805091 -01-02 Reported May 21, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GC0513981SHSHSB GC0513981SHSHSB GC0513981SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD# 980509101 980509101 980509101 <br /> Sample Conic N D N D N D <br /> Prepared Date 5/13/98 5/13/98 5/13/98 <br /> Analyzed Date 5/13/98 5/13/98 5/13/98 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Conc Spiked 8 0 mg/Kg 8 0 mg/Kg 8 0 mg/Kg <br /> Result 10 11 11 <br /> MS %Recovery 125 138 138 <br /> Dup Result 84 91 90 <br /> IVISD% Recov 105 114 113 <br /> RPD 17 19 20 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # IBLK051398 BLK051398 BLK051398 <br /> Prepared Date 5/13/98 5/13/98 5/13/98 <br /> Analyzed Date 5/13/98 5/13/98 5/13/98 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> ...Conc.-Spiked 8 0 mg/Kg-8 0 mg/Kg 8 0 mg/Kg <br /> LCS Result 83 81 82 <br /> LCS% Recov 104 101 103 <br /> 50-150 50150 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 /> leggy <br /> ALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sampl <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure <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 /> nnernager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9805091 CCC <1> <br /> 1 <br />