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r 1 <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 970708-F1 <br /> { <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9707594 -01, 10 Reported Jul 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO71897BTEX03A GCO71897BTEK03A GC071897BTEX03A GCO71897BTEX03A GC071897BTEX03A <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: D Jirsa D Jirsa D Jirsa D Jirsa D Jima <br /> MS/MSD#' 970768910 970768910 970768910 970768910 970768910 <br /> Sample Conc. N D N D N D N D N D <br /> Prepared Date: 7/18/97 7/18/97 7/18/97 7/18/97 7/18/97 <br /> Analyzed Date 7/18/97 7/18/97 7/18/97 7/18/97 7/18/97 <br /> Instrument I D # GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked. 10pg/L 10Ng/L 10Ng/L 30pg/L 60ug/L <br /> Result 93 91 92 26 67 <br /> 40% Recovery: 93 91 92 87 112 <br /> Dup. Result 89 87 88 25 64 <br /> MSD % Recov.. 69 87 88 83 107 <br /> RPD 44 45 44 39 46 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #, BLK071897 BLK071897 BLK071897 BLK071897 BLK071897 <br /> Prepared Date: 7/18/97 7/18/97 7/18/97 7/18/97 7/18/97 <br /> Analyzed Date 7/18/97 7/18/97 7/18/97 7/18/97 7/18/97 <br /> Instrument I D #: GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10pg/L 10,ug/L 10yg/L 30pg/L 60pg/L <br /> LCS Result- 9 0 88 88 25 65 <br /> LCS % Recov 90 88 88 83 108 <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 /> Dct <br /> O NALYTICAL 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 /> r 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 /> Penner <br /> Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9707594 BLA <1 Y <br />