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Sequoia680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 97,38, <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 4h� ' ' <br /> 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 Stockton/970829-S1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9708F00 -01-02 Reported Sep 3, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#" GC082997BTEX2IA GCO82997BTEX21A GCO82997BTEX21A GCO82997BTEX21A GCOSN97BTEX21A <br /> Anally. 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 Jtrsa D Jirsa D Jirsa D Jirsa <br /> MS/MSD # 97o8C7105 970SC7105 970SC7105 970807105 9708C7105 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Analyzed Date. 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Instrument I D #' GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone. Spiked: 10ug/L 10pg/L 10pg/L 30Ng/L 60ug/L <br /> Result: 10 10 10 30 53 <br /> MS % Recovery 100 100 100 100 88 <br /> Dup. Result' 98 96 95 28 50 <br /> MSD % Recov.: 98 96 95 93 83 <br /> RPD. 20 41 51 69 58 <br /> RPD Limit. 0-25 0-25 0-25 0-25 0-25 <br /> LCs # BLK082997 BLK082997 BLK082997 BLK082997 BLK082997 <br /> Prepared Date 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Analyzed Date. 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Instrument I D #: GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone. Spiked 10 pg/L 10 Ng/L 10 erg/L 30 pg/L 60 ug/L <br /> LCS Result 95 94 93 28 49 <br /> LCS % Recov 95 94 93 93 82 <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 /> 3egA NALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sampl <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 /> nner <br /> Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9708F00 BLA <1 <br />