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680wCeeake Drive Redwood City CA 940633(650)364-9600 FAX(650) 364-9233 F <br /> a Sequoia 404 N Wlget L ne 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)79Z-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 341 East Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9811 H53 -01 Reported Dec 14, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> QC Batch# GC120498802002A GC120498802002A GC120498802002A GC120498802002A GC120498802002A <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 # 8120036 8120036 8120036 8120036 8120036 <br /> Sample Conc N D N D N D ND 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 # HP2 HP2 HP2 - - HP2 HP2 <br /> Conc Spiked 20jug/L 20ug/L 20pg/L 60pg/L 310pg/L <br /> Result 20 19 20 64 400 <br /> MS % Recovery 100 95 100 107 129 <br /> Dup Result 19 19 20 63 380 <br /> MSD % Recov 95 95 100 105 123 <br /> RPD 51 00 00 16 51 <br />-RPD-Limit -o-2o 0-20 0-20 0-20 0-50 <br /> LCS# LCS120498 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 #. HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20Ng/L 20,tg/L 20pg/L 60Ng/L 310lig/L <br /> LCS Result 20 19 20 64 380 <br /> LCS-% Recov 100 95 100 107 123 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 50-150 <br /> Control Limits <br /> r <br /> Please Note <br /> S_E GOI ANA_ _ICAL _ _ The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents,- <br /> EW 71 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 /> Peggy P�i er <br /> Project anager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9811 H53 BLA <1> <br />