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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(6501,364 9233„ <br /> 404 N Wtget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5 10)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921-9100, <br /> -Blaine Tech' Services, Inc Client Project ID Shell Stockton 980112-H2 <br /> 1 1580 Rogers Ave Matrix Liquid f <br /> San Jose, CA 95112 , <br /> {Attention Fran Thie Work Omer# 9801694-09 Reported Jan 30, 1998`` <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> GC Batch#: GC012798BTEX03A GCO12798BTEX03A GCO12798BTEX03A GCO12798STEX03A GCO12798BTEX03A <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: A. Miraftab A_ Miraftab A.Miraftab A.Miraftab A.Miraftab <br /> MS/MSD # 980184401 980184401 9801$4401 980184401 980184401 <br /> Sample Conc.. N D N D N D N D N D <br /> Prepared Date- 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Analyzed Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Instrument I D #- GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10pg/L 1011g/L 10lig/L 30Ng/L 50,ug/L <br /> Result: 93 91 94 28 56 <br /> MS % Recovery 93 91 94 93 93 <br /> Dup. Result: 88 88 90 27 54 <br /> MSD % Recov. 88 88 90 90 90 <br /> RPD' 55 34 43 36 36 <br /> RPD Limit-0-25 0-25 0-25 0.25 0-25� <br /> LCS # BLK012798 BLK012798 BLK012798 BLK012798 BLK012798 <br /> Prepared-Date' 1/27/98-1-/27/,q8-1/27/98 1/27/98 1/27/98 <br /> Analyzed Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Instrument I D #: GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc. Spiked 10,ug/L 10/rg/L 10frg/L 30Ng/L 60jig/L <br /> LCS Result 9 4 9 4 9 7 29 57 <br /> LCS % Recov .. 94 94 97 97 95 <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 /> U NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sampi <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 /> e IP <br /> r ect Manager **MS=Matrix Spike, MSD=MS Duplicate,RPO=Relative% Difference 9801694 SLA <6> <br />