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Sequoia680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Laine Tech Services, Inc Client Prolect ID Shell, Stockton /960823-K1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9608F60 -01 Reported Sep 25, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO90996STEX21A GC090996BTEX21A GC090M96BTEX2IA GCO90996BTEX21A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method' EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst' R Burton R Burton R Burton R Burton <br /> MS/MSD #• 960811707 960811707 960811707 960811707 <br /> Sample Conc N D 065 N D N D <br /> Prepared Date 9/9/96 9/9/96 9/9/96 9/9/96 <br /> Analyzed Date 9/9/96 9/9/96 9/9/96 9/9/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10 ug/L 10ug/L 10 ug/L 30 ug/L <br /> Result 98 10 9 6 31 <br /> MS % Recovery 98 100 96 101 <br /> Dup Result 10 10 99 31 <br /> sMSD % Recov 100 100 99 103 <br /> RPD 20 00 31 00 <br /> RPD Limit 0-25 0-25 0-26 0-25 <br /> LCS# BLK090996 BLK090996 BLK090996 <br /> 8LK090996 <br /> Prepared Date 9/9/96 9/9/96 9/9/96 9/9/96 <br /> Analyzed Date, 9/9/96 9/9/96 9/9/96 9/9/96 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc. Spiked. long/L 10ug/L 10ug/L 30ug/L <br /> LCS Result 99 95 95 29 <br /> LCS % Recov 99 95 95 97 <br /> MS/MSD 60-140 60-140 60-140 60-140 <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 /> ANALYTICAL preparation,and analytical methods employed for the samples The matrix spoke is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure It <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br />*Je <br /> Penner <br /> Manager :*MS Matrix Spike, MSD MS Duplicate,RPO=Relative%Difference Sfi08F60 BLA <1> <br />