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680 Chesapeake Dnve Redwood Clty CA 94063 (650)364-9640 FAX(650)1364-9231 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 11) 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 Shell, 4445 Pershing Ave <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9808904 01-04 Reported Sep 8, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> ' -Benzene <br /> QC Batch# GCO82698802002-A GC082698802002A GC082698802002A GCO826988020M GC082698802002A <br /> Anally 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 # LC8082698 LCS082698 LC8082698 LCS082698 LCS082698 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 8/26/98 8/26/98 8/26/98 8/26/98 8/26/98 <br /> Analyzed Date, 8/26/98 8/26/98 8/26/98 8/26/98 8/26/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked: 20 Ng/L ,- 20 yg/L 20 pg/L 60,ug/L 330 pg/L <br /> Result 20 20 19 60 330 <br /> MS % Recovery 100 100 95 100 100 <br /> Dup Result 21 20 21 62 310 <br /> MSD % Recov. 105 100 105 103 94 <br /> RPD 49 00 10 33 63 <br /> RPD Limit = - .o-2o-w w- _ =0-20- ---­0-20� _- - -- =-0-20 _ _ -- 050 _- <br /> -LCS # - - _ -- - - - - - - <br /> Prepared Date <br /> Analyzed Date <br /> Instrument 1 D # <br /> Conc Spiked. <br /> LCS Result. <br /> LCS % Recov .. <br /> LCS 70-130 70-130 70-130 70-130 60-140 <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 /> IA ALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample' <br /> 127 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 /> erference,the LCS recovery is to be used to validate the batch <br /> - Peg Penner <br /> ect Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9808904 BLA t 1> <br />