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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N \Viget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988 %73 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 %00 FAX(916)911-0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /971223-F1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> < Attention Fran Thee Work Order# 9712F97-01 Reported Jan 8, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#. GCO10698BTEX02A GCO10698BTEX02A GC010698BTEX02A GCO10698BTEX02A GCO10698BTEX02A <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: A Miraftab A Miraftab A Miraftab A Miraftab A Miraftab <br /> MS/MSD # 980100903 980100903 980100903 980100903 980100903 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date: 1/6/98 1/6/98 1/6/98 1/6/98 1/6/98 <br /> Analyzed Date 1/6/98 1/6/98 1/6/98 1/6/98 1/6/98 <br /> Instrument I D.# GGHP2 GCHP2 GGHP2 GCHP2 GCHP2 <br /> Conc. Spiked: 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> Result 9 4 8 8 8 9 27 60 <br /> MS % Recovery 94 88 89 90 100 <br /> Dup. Result 96 9 2 93 28 61 <br /> MSD % Recov : 96 92 93 93 102 <br /> RPD 21 44 44 36 17 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK010698 BLK010698 BLK010698 BLK010698 ELK010698 <br /> Prepared Date 1/6/98 1/6/98 1/6/98 1/6/98 1/6/98 <br /> Analyzed Date. 1/6/98 1/6/98 1/6/98 1/6/98 1/6/98 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L 60 ug/L <br /> LCS Result -96 9 1 92 28 60 <br /> LCS % Recov .. 96 91 92 93 100 <br /> MSIMSD 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 /> E O A A ALYTICAL 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 /> P ner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 97121797 BLA <3> <br />