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SCDequoia 680 Chesapeake Dnve Redwood GM CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek, CA 94598 (510) 988 9600 FAX(5io)988 %73 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> OBlaine Tech Services, Inc Client Project ID Shell Stockton f 970805-S1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9708341 -01, 02 Reported Aug 13, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Acetone MIBK Tetra 1,1,1-TCA <br /> Hydrofuran <br /> QC Batch# GC0811971SHSHSA GC081197ISHSHSA GCO811971SHSHSA GCO811971SHSHSA <br /> Analy Method ISHS ISHS ISHS ISHS <br /> Prep Method HS HS HS HS <br /> Analyst- T Tran T Tran T Tran T Tran <br /> MS/MSD# 970816801 970816801 970816801 970816801 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 8/11/97 8/11/97 8/11/97 8/11/97 <br /> Analyzed Date 8/11/97 8/11/97 8/11/97 8/11/97 <br /> Instrument I D # GCv1 GCv1 GCv1 GCv1 <br /> Conc Spiked 4 0 mg/L 1 0 mg/L 2 0 mg/L 1 0 mg/L <br /> Result 4 2 10 22 076 <br /> MS % Recovery 105 100 110 76 <br /> Dup Result 4 3 087 2 2 077 <br /> MSD % Recov ,' 108 87 110 77 <br /> RPD 24 14 00 13 <br /> RPD Limit 0-40 0-40 0-40 0-40 <br /> LCS # BLK081197 BLK081197 BLK081197 BLK081197 <br /> Prepared Date 8/11/97 8/11/97 8/11/97 8/11/97 <br /> Analyzed Date 8/11/97 8/11/97 8/11/97 8/11/97 <br /> Instrument 1 D # GCvi GCv1 GCv1 GCv1 <br /> Conc Spiked 4 0 mg/L 1 0 mg/L 2 0 mg/L 1 0 mg/L <br /> LCS Result 41 091 22 097 <br /> LCS % Recov 103 91 110 97 <br /> 50-150 50-150 50-150 50-150 <br /> LCS 70-130 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 /> SEQZenner <br /> ALYTICA 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 /> Pegg **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager Page 1 of 2 9708341 BLA <1> <br />