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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX (510)988 X7.,3 <br /> Analytical 119 Sinker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 Ot00 <br /> r ry <br /> Blaine Tech Services, Inc Client Protect ID Shell Tracy/970827-T2 <br /> U <br /> 1680 Rogers Ave Matrix Liquid <br /> {San Jose, CA 95112 " <br /> ,`Attention Fran Thie Work Order# 9708F55-02-03, 05 Reported Sep 17, 1997 , <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch# GCO90397BTEXOIA GC090397BTEXOIA GCO90397BTEX0IA GC090397BTEXOIA G0090397BTEX01A <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 Porter A.Porter A Porter A.Porter A.Porter <br /> MS/MSD# 9708D7804 970SD7804 9708D7804 9708D7804 9708D7804 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 9/3/97 9/3/97 9/3/97 9/3/97 9/3/97 <br /> Analyzed Date 9/3/97 9/3/97 9/3/97 9/3/97 9/3/97 <br /> Instrument I.D # GCHP1 GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conc Spiked 101rg/L 10jtg/L 10Ng/L 30ug/L 60Ng/L <br /> Result 10 95 95 30 57 <br /> MS % Recovery 100 95 95 100 95 <br /> 7 <br /> Dup Result 11 10 10 31 60 <br /> MSD % Recov 110 100 100 103 100 <br /> RPD 95 51 51 33 51 <br /> RPD L'imlt.` 0-25 0-25 — 0-25 0-25 0-25 <br /> LCS #. BLK090397 BLK090397 BLK090397 BLK090397 BLK090397 <br /> Prepared Date 9/3/97 9/3/97 9/3/97 9/3/97 9/3/97 <br /> Analyzed Date 9/3/97 9/3/97 9/3/97 9/3/97 9/3/97 <br /> Instrument I.D # GCHP1 GCHP1 GCHP1 GCHP1 GCHPI <br /> Conc Spiked 10 pg/L 10 pg/L 10 pg/L 30 Ng/L 60 pg/L <br /> LCS Resuh 11 10 98 30 58 <br /> LCS % Recov 110 100 98 100 97 <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 /> S U A 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 /> 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 /> e P neer <br /> Probe anager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9708F55 BLA <2> <br />