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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> �tilr� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 {916}921-9600 FAX(416)921-010 0 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)79Z-034Z <br /> Blaine Tech Services, Inc Client Project ID Shell 7910 lower Sacramento <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9811699 -01-03 Reported Dec 4, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# 8110248 8110248 8110248 8110248 <br /> Analy Method EPA 8015M/8020M EPA8015M/8020M EPA 8015M/8020M EPA 8015M/8020M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst - - - - <br /> MS/MSD# P811131-02 P811131-02 P811131-02 P811131-02 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Analyzed Date 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Instrument I.D# - - - - <br /> Conc Spiked 100pg/L 100lig/L 100pg/L 300 pg/L <br /> Result 914 91 921 281 <br /> MS % Recovery 914 91 921 937 <br /> Dup Result 90 896 906 276 <br /> MSD% Recov 90 896 906 92 <br /> RPD 154 155 164 18 <br /> RPD Limit 0-5 o-6 0-4 0-5 <br /> LCS # LCS111698 LCS111698 LCS111698 LCS 111698 <br /> Prepared Date 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Analyzed Date 11/16/98 11/16/98 11/16/98 11/16/98 <br /> Instrument I D # - - - <br /> Conc Spiked 100 ftg/L 100Ng/L 100 ftg/L 300 Ng/L <br /> LCS Result 915 915 927 285 <br /> LCS % Recov 91 5 915 927 95 <br /> 82-119 80-117 66-125 73-119 <br /> LCS 84-116 81117 79-115 80-114 <br /> Control Limits <br /> Please Note <br /> Sf <br /> YTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> �Ereparation,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 /> PP *x MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9811699 BLA <1> <br />