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I <br /> �I ! <br /> 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> /�♦��l\� Sequoia 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264/981124-J2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order# 9811 H50-01-03, 05 Reported Dec 22, 1998 <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEXasTPH <br /> Benzene <br /> OC Batch# GC120498802004A GC120498802004A GC120498802004A GC120498802004A GC120498802004A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst D Newcomb D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD # 8120059 8120059 8120059 8120059 8120059 <br /> Sample Conc N D N D ND N D N D <br /> Prepared Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Analyzed Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Instrument I D # HP4 HP4 HP4 HP4 HP4 <br /> Conc Spiked 20ug/L 20ug/L 20ug/L 60ug/L 330pg/L <br /> Result 22 19 19 66 340 <br /> MS % Recovery 110 95 95 110 103 <br /> I <br /> Dup Result 23 19 19 66 330 <br /> MSD % Recov 115 95 95 110 100 <br /> RPD 44 00 00 00 30 <br /> RPD Limit 0-20 0-20 0-20 0-20 050 <br /> LCs # LCS120496 LCS120498 LCS120498 LCS120498 LCS120498 <br /> Prepared Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Analyzed Date 12/4/98 12/4/98 12/4/98 12/4/98 12/4/98 <br /> Instrument I D # HP4 HP4 HP4 HP4 HP4 <br /> Conc Spiked 20pg/L 20N9/L 20pg/L 60ug/L 330pg/L <br /> LCS Result 22 19 20 67 350 <br /> LCS % Recov 110 95 100 112 106 <br /> MS MSD 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 50150 <br /> Control Limits <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS Is a control sample of known Interferent-free matrix that Is analyzed using the same reagents <br /> Elap #1 71 preparation,and analyticai 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 /> gory <br /> r ` ct Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9811H50 BILA <2> <br /> 4 <br />