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Sequoia 6l Zpeake Drive Redwood City CA 94lo (650)364-9600 FAX(650)364-9233 <br /> 404 Wlget Lane Walnut Creek CA 945 (510)988-9600 FAX(510)988-9673 <br /> 4D- 119 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX 916)921 -OtOO <br /> �/T1Ana } ca 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 341 E Main St <br /> 1680 Rogers Ave Matrrx Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9804174 -01 Reported May 18, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#- GCO50598802005A GCO50598802005A GCO50598802005A GCO50598802005A GCO50598802005A <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# 8042121 8042121 8042121 8042121 8042121 <br /> Sample Conc N D N D ND N D N D <br /> Prepared Date 5/5/98 5/5/98 5/5/98 5/5/98 5/5/98 <br /> Analyzed Date; 5/5/98 5/5/98 5/5/98 5/5/98 5/5/98 <br /> Instrument I D # HP5 HP5 HP5 HP5 HP5 <br /> Conc Spiked 20 jug/L 20 fig/L 20 fig/L 60Mg/L 590Mg/L <br /> Result 19 20 19 60 340 <br /> MS % Recovery 95 100 95 100 58 <br /> Dup Result 19 20 20 62 620 <br /> MSD % Recov 95 100 100 103 105 <br /> RPD 00 00 51 33 583 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS# LCS050598 LCS050598 LCS050598 LCS050598 LCS050598 <br /> Prepared Date 5/5/98 5/5/98 5/5/98 5/5/98 5/5/98 <br /> Analyzed Date 5/5/98 5/5/98 5/5/98 5/5/98 5/5/98 <br /> Instrument I D # HP5 HP5 HP5 HP5 HP5 <br /> Conc. Spiked 20 fig/L 20 fug/L 20 fig/L 60 fig/L 590 ug/L <br /> LCS Result 21 22 22 67 420 <br /> LCS % Recov 105 110 110 112 71 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> QU IA A ALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 1271 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 It <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 /> e gy Penner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative %Difference 9804174 BLA <I> <br />