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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 911 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton/970402-F1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9704278 -02, 06-09 Reported Apr 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#' GCO41197BTEX01A GC04119713TEX01A GC041197BTEXOIA GC041197BTEX01A GC0411978TEX01A <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 R Geckler R Geckler R Geckler R Geckler R Geckler <br /> MS/MSD# 970305303 970305303 970305303 970305303 970305303 <br /> Sample Cone. N a N D N D N C N D <br /> Prepared Date, 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Analyzed Date 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Instrument I D # GCHP01 GCHP01 GCHP01 GCHP01 GCHP01 <br /> Cone. Spiked 10ug/L 10Ng/L 10ug/L 30ug/L 60ug/L <br /> Result 11 11 11 32 63 <br /> 46S % Recovery 110 110 110 107 105 <br /> Dup. Result 12 11 11 107 63 <br /> MSD % Recov,' 120 110 110 32 105 <br /> RPD 87 00 00 00 00 <br /> RPD Limit 0-50 0-50 0-50 0-50 0-50 <br /> LCS#. BLK041197BSA BLK041197BSA BLK041197BSA BLK0411978SA BLK041197BSA <br /> Prepared Date 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Analyzed Date. 4/11/97 4/11/97 4/11/97 4/11/97 4/11/97 <br /> Instrument I D #. GCHP01 GCHP01 GCHP01 GCHP01 GCHP01 <br /> Cone. Spiked: 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> LCS Result 11 11 11 32 63 <br /> LCS % Recov 110 110 110 107 105 <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 Limit <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> O 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 /> Pe gy enner <br /> Prol t Manager *" MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9704278 BLA <2> <br />