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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N W Set Cane Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> � Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1 0 <br /> ,Blaine Tech Services, Inc Client Project ID Shell 141 N EI Dorado <br /> '1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98071-179 -01 Reported Aug 17, 1998 <br /> QUAL=ITY CONTROL=DATA=REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> QC Batch# GC080898802004A GC080898802004A GC080898802004A GCO80898802004A GCO80898802004A <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 /> MS/MSD # 8080161 8080161 8080161 8080161 8080151 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date 8/8/98 8/8/98 8/8/98 8/8/98 8/8/98 <br /> Analyzed Date 8/8/98 8/8/98 8/8/98 8/8/98 8/8/98 <br /> Instrument I D # HP4 HP4 HP4 HP4 HP4 <br /> Cone Spiked 20 ug/L 20 Ng/L 20 yg/L 60Vg/L 390 pg/L <br /> Result 16 18 19 60 460 <br /> MS % Recovery 80 90 95 100 118 <br /> Dup Result 17 19 20 61 370 . <br /> MSD % Recov 85 95 100 102 95 <br /> RPD 61 54 51 17 217 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS080898 LCS080898 LCS080898 LCS080898 LCS080898 <br /> Prepared Date 8/8/98 8/8/98 8/8/98 8/8/98 8/8/98 <br /> Analyzed-Date• 8/8/98 8/8/98 8/8/98 8/8798 8/6/98 <br /> Instrument I D # HP4 HP4 HP4 HP4 HP4 <br /> Cone Spiked 20jig/L 20,wg/L 20jtg/L 60yg/L 390ug/L <br /> LCS Result 18 20 21 65 360 <br /> LCS % Recov 90 100 105 108 92 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <br /> Control Limits <br /> Please Note <br /> CEU A NALYTICAL The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> 127 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 <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 /> ner <br /> anager **MS=Matrix Spike,MSD-MS Duplicate, RPD=Relative%Difference 98071-179 BLA <1> <br />