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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> (f 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 51riker Avenue Su,te 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)79Z-0342 <br /> 0 <br /> Blaine Tech Services, Inc Client Project ID Shell 6131 Pacific Ave <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9805F44-04 Reported Jun 11, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO60698802002A GCO60698802002A GC060698802002A GCO60698802002A GCO60698802002A <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 K Nill K Nill K dill K Ni11 K Nill <br /> MS/MSD # 8052241 8052241 8052241 8052241 8052241 <br /> Sample Conc . N D N D N D N D N D <br /> Prepared Date: 6/6/98 6/6/98 6/6/98 6/6/98 6/6/98 <br /> Analyzed Date. 6/6/98 6/6/98 6/6/98 6/6/98 6/6/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20ug/L 20ug/L 20ug/L 60ug/L 360ug/L <br /> Result 17 17 18 52 350 <br /> MS % Recovery 85 85 90 87 97 <br /> 0 Dup Result: 20 19 20 60 380 <br /> MSD % Recov : 100 95 100 100 106 <br /> RPD 162 111 105 143 82 <br /> RPD Limit 0-25 0-20 0-20 0-20 0-50 <br /> LCS #- LCS060698 LCS060698 LCS060698 LCS060698 LCS060698 <br /> Prepared Date 6/6/98 6/6/98 6/6/98 6/6/98 6/6/98 <br /> Analyzed Date 6/6/98 6/6/98 6/6/98 6/6/98 6/6/98 <br /> Instrument I D #- HP2 HP2 HP2 HP2 HP2 <br /> Conc. Spiked: 20ug/L 20ug/L 20ug/L 60ug/L 360 119/1- <br /> LCS <br /> g/LLCS Result 19 19 19 59 300 <br /> LCS % Recov. 95 95 95 98 83 <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 /> S�QU A L ICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> ap 12 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 /> Pe gy er interference,the LCS recovery is to be used to validate the batch <br /> Pr ec Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9805F44 BLA <6> <br />