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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> �r <br /> a_� 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)79Z-1865 FAX(707)79Z-0342 <br /> 0 .4 <br /> Blaine Tech Services, Inc Client Project ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9807H88-11-17, 9807H89-19-20 Reported Aug 20, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO81198802005A GC081198802005A GC081198802005A GC081198802005A GC081198802005A <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#- 8072200 8072200 8072200 8072200 8072200 <br /> Sample Conc.. N D N D N D N D N D <br /> Prepared Date- 8/11/98 8/11/98 8/11/98 8/11/98 8/11/98 <br /> Analyzed Date 8/11/98 8/11/98 8/11/98 8/11/98 8/11/98 <br /> Instrument LD # HP5 HP5 HP5 HP5 HP5 <br /> Conc Spiked 20ltg/L 20ftg/L 20lrg/L 60pg/L 330Ng/L <br /> Result 17 18 17 55 230 <br /> MS % Recovery 85 90 85 92 70 <br /> Dup Result 20 20 19 60 250 <br /> MSD % Recov 100 100 95 100 76 <br /> RPD 162 105 111 87 83 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS081198 LC8081198 LCS081198 LCS081198 LCS081198 <br /> Prepared Date 8/11/98 8/11/98 8/11/98 8/11/98 8/11/98 <br /> Analyzed Date 8/11/98 8/11/98 8/11/98 8/11/98 8/11/98 <br /> Instrument I D # HP5 HP5 HP5 HP5 HP5 <br /> Colic Spiked 20 ug/L 20 yg/L 20 pg/L 60 ug/L 330 Ng/L <br /> LCS Result 20 20 19 57 340 <br /> LCS % Recov 100 100 95 95 103 <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 /> SEQ I A LYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br />.Ela 1 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 /> Pe y P ner <br /> Prot anager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9807H87 BLA <15> <br />