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-� <br /> � Sequoia 680 Chesapeake Drive Redwood City CA 94063 (680)364-9600 FAX(680)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> � Analytical 819 Sulker Avenue Suites Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 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 6131 Pacific Ave <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9811 H55 -01-03 Reported Dec 14, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> QC Batch# GC120398802002A GC120398802002A GC120398802002A GC120398802002A GC120398802002A <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 C Westwater C Westwater C Westwater C Westwater C Westwater <br /> M S/MSD# 8112096 8112096 8112096 8112096 8112096 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 12/3/98 12/3/98 12/3/98 12/3/98 12/3/98 <br /> Analyzed Date 12/3/98 12/3/98 12/3/98 12/3/98 12/3/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20 yg/L 20 Mg/L 20 ug/L 60 jug/L 400,ug/L <br /> Result 20 19 19 65 390 <br /> MS % Recovery 100 95 95 108 98 <br /> Dup Result 16 15 15 52 390 <br /> MSD % Recov so 75 75 87 98 <br /> RPD 222 235 235 222 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS120398 LCS120398 LCS120398 LCS120398 LCS120398 <br /> Prepared Date 12/3/98 12/3/98 12/3/98 12/3/98 12/3/98 <br /> Analyzed Date 12/3/98 12/3/98 12/3/98 12/3/98 12/3/98 <br /> Instrument I D # HP2 HP2 HP2 HP2 HP2 <br /> Conc Spiked 20Ng/L 20pg/L 20pg/L 60pg/L 400pg/L <br /> LCS Result 19 18 19 62 390 <br /> LCS % Recov 95 90 95 103 98 <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 /> Please Note <br /> S U IA NALYTICAL The LGS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Peg Penner <br /> Pr ct Manager **MS=Matrix Spike, MSI}=MS Duplicate, RPD=Relative%Difference 9811H55 BLA <1> <br /> 6D <br />