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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N target Lane Walnut Creek,CA 94598 (925)988-9600 FAX(9Zr5)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1665 FAX(707)79Z-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# 9807H83-01, -06-09, 9807H84-10 Reported Aug 24, 1998 <br /> QUALITY CONTROL DATA`REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> _ Benzene _ <br /> QC Batch# GC080798BTEX02A GCoa0798BTEX02A GG080798BTEX02A GCO80798BTEX02A y GCO80798BTEXo2A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EAP 5030 EAP 5030 EAP 5030 EAP 5030 EAP 5030 <br /> Analyst C Westwater C Westwater C Westwater C Westwater C Westwater <br /> MS/MSD # 8072240 8072240 8072240 8072240 8072240 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 8/7/98 8/7/98 8/7/98 8/7/98 8/7/98 <br /> Analyzed Date 8/7/98 8/7/98 8/7/98 8/7/98 8/7/98 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 20,ug/L 20 ug/L 20ug/L 60 pg/L 340 jug/1- <br /> Result <br /> ug/LResult 21 21 22 65 320 <br /> MS % Recovery 105 105 110 108 94 <br /> Dup Result 21 21 22 66 320 i <br /> MSD % Recov 105 105 110 110 94 <br /> RPD 00 00 00 15 40 <br /> RPD Limit 0-25 0-25 4-25 0-25 0-25 <br /> LCS # - BLK080798— -BLK080798 r _ BLK080798 _ _ BLK080798 T BLK080798 -� <br /> Prepared Date 8/7/98 8/7/98 8/7/98 8/7/98 8/7/98 <br /> Analyzed Date 8/7/98 8/7/98 8/7/98 8/7/98 8/7/98 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 20Ng/L 20pg/L 20pg/L 60Ng/L 340ug/L <br /> LCS Result 19 19 19 60 320 <br /> LCS % Recov 95 95 95 100 94 <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 /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> lA NALYTICAL, #1271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of$amp <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 as to be used to validate the batch <br /> c <br /> TJ <br /> t Manager MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9807H83BLA <5> <br />