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15) <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (4t5) 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) 921 9600 FAX(916)921 0100 <br /> Ai <br /> f� <br /> Smith Environmental Client Project ID 21160, 94-331 01-06 <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 9608J33 01, 02 Reported Sep 13, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC0910968TEX01A GCO91096BTEX01A GCO91096BTEXolA GCO91096BTEX01A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Burton R Burton R Burton R Burton <br /> MS/MSD# 9608J7101 960SJ7101 9608J7101 9608J7101 <br /> Sample Cone N D N D N D N D <br /> Prepares! Date 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Analyzed Date 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone Spiked long/L 10ug/1- 10ug/L 30ug/L <br /> Result 11 10 97 31 <br /> MS % Recovery 110 100 97 103 <br /> iDup Result 12 11 10 32 <br /> MSD % Recov 120 110 100 107 <br /> RPD 87 95 30 32 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# BLK082596 BLK082596 BLK082596 BLK082596 <br /> Prepared Date 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Analyzed Date 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone Spiked 10ug/L 10ug/L 10ug/L 30ug/L <br /> LCS Result 12 11 10 30 <br /> LCS % Recov 120 110 100 100 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-tree matrix that is analyzed using the same reagents, <br /> 0 <br /> SEQUFnkis <br /> LYTI 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 /> V s <br /> interference,the LCS recovery is to be used to validate the batch <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9608J33 SSS <3> <br />