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Sequoia 680 Chesapeake Drive Redwood Cary,CA 94063 (650) 964-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510) 988 9673 <br /> �III� Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916) 921 0100 <br /> Blaine Tech Services, Inc ` Client Project ID Shell btockton f 971202-L1 <br /> 1680 Rogers Ave Matrix Liquid <br /> ,-San Jose, CA 95112 <br /> 'Attention Fran Thie Work Order# 9712358-02-03, 05, 0"9 Reported Dec 31, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#. GC1216978TEX02A GC1216978TEX02A GC1216976TEX02A GC121697STEX02A GC121697BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5430 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A.Miraftab A Miraftab A.Miraftab A-Miraftab A.MEraftab <br /> MS/MSD # 971277503 971277503 971277543 971277503 971277503 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 12/16/97 12/16/97 12/16/97 12/16/97 12/16/97 <br /> Analyzed Date 12/16/97 12/16/97 12/16/97 12/16/97 12/16/97 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc. Spiked 10ug/L 10Ng/L 10ug/L 30Ng/L 60ug/L <br /> Result 98 98 99 31 62 <br /> MS % Recovery 98 98 99 103 103 <br /> Dup Result 10 10 10 32 65 <br /> MSD % Recov. 100 100 100 107 108 <br /> RPD 20 20 10 32 47 <br /> RP_D_Llmd. 0-25 0-25-0-25 0-25— 0-25_ _ <br /> LCS # BLK121697 BLK121697 BLK121697 SLK121697 BLK121697 <br /> Prepared Date 12/16/97 12/16/97 12/15/97 12/16/97 12/16/97 <br /> Analyzed Date- 12/16/97 12/16/97 12/16/97 12/16/97 12/16/97 <br /> Instrument I.D.#- GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc. Spiked 10pg/L 10Ng/L 10pg/L 30Etg/L 60pg/L <br /> LCS Result 94 93 95 29 60 <br /> LCS % Recov 94 93 95 97 100 <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 /> SI ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of samp <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 /> Pe nner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9712358 BLA a2> <br />