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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> frrll� Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 01()0 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /970131-Z1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9702115 06 Reported Feb 13, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#- GCO21197BTEX17A GCO21197BTEX17A GCO21197STIX17A GCO21197BTEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method' EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst X Miraftab A Miraftab A. Miraftab A.Miraftab <br /> MS/MSD #. 970233609 970233609 970233509 970233609 <br /> Sample Conc : N D N D N D N D <br /> Prepared Date 2/11/97 2/11/97 2/11/97 2/11/97 <br /> Analyzed Date 2/11/97 2/11/97 2/11/97 2/11/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 10 10 10 31 <br /> MS % Recovery 100 100 100 103 <br /> • Dup Result 10 10 10 32 <br /> NiS❑ % Recov 100 100 100 107 <br /> RPD_ 00 00 00 32 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> LCS # BLK021197A BLK021197A BLK021197A BLK021197A <br /> Prepared Date 2/11/97 2/11/97 2/11/97 2/11/97 <br /> Analyzed Date- 2/11/97 2/11/97 2/11/97 2/11/97 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10ug/L long/L 10pg/L 30Ng/L <br /> LCS Result: 93 9 4 9 4 28 <br /> LCS % Recov • 93 94 94 93 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 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 1s analyzed using the same reagents, <br /> U 1A ANALYTICAL 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 /> 9y <br /> P ojbct Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9702115 BLA <3> <br />