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, Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> ' 404 N Wigct Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> l 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> � Analytica <br /> Blaine Teal Services,Inc Client Project ID Shell Tracy/970827-T2 u <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9708F55-04 Reported Sep 17, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch# GC090497BTEX18A G0090497BTEX18A GCO90497BTEX18A GCO90497BTEX18A GCO90497BTEX18A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA S015M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Porter A.Porter A. Porter A Porter A Porter <br /> MS/MSD# 970817305 9708F7305 9708F7305 9708F7305 9708F7305 <br /> Sample Conc.. N D N D N D N D N D <br /> Prepared Date 9/4/97 9/4/97 9/4/97 9/4/97 9/4/97 <br /> Analyzed Date 9/4/97 9/4/97 9/4/97 9/4/97 9/4/97 <br /> Instrument LD # GCHP18 GCHP18 GCHP18 GCHP18 GCHP18 <br /> Cone. Spiked 10,tg/L 10pg/L 10yg/L 30Erg/L 60Ng/L <br /> Result. 96 97 96 31 58 <br /> MS % Recovery: 96 97 96 103 97 <br /> iDup. Result* 10 10 10 32 62 <br /> MSD % Recov. 100 100 100 107 103 <br /> RPD. 41 30 41 32 67 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS#: BLK090497 BLK090497 BLK090497 BLK090497 BLK090497 <br /> Prepared Date' 9/4/97 9/4/97 9/4/97 9/4/97 9/4/97 <br /> Analyzed Date. 9/4/97 9/4/97 9/4/97 9/4/97 9/4/97 <br /> Instrument I D.#' GCHP18 GCHP18 GCHP18 GCHP18 GCHP18 <br /> Cone Spiked 10,ug/L 10 pg/L 10 ug/L 30 pg/L 60 ug/L <br /> LCS Result 10 10 10 31 61 <br /> LCS % Recov 100 100 100 103 102 <br /> WMW 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 /> WSEAALYTICAL 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 tall within specified control limits due to matrix <br /> interference,the LCS recovery Is to be used to validate the batch <br /> r <br /> ger *"MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9708F55 BLA a3> <br />