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680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> Sequoia <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 /> M <br /> Smith Environmental Client Project ID 94-367 10-11/ 14506 <br /> 1260 Graphics Drive - Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey Work Order# 9701 E07-02 deported Feb 5, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO12997BTEX02-A GCO12997BTEX02A GCO12997BTEX02A GCO12997BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A Miraftab A Miraftab A Miraftab A Miraftab <br /> MS/MSD# 9701D1903 9701 D1903 970101903 9701D1903 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Analyzed Date 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spilled 10 jug/L 10ug/L 10ug/L 30pg/L <br /> Result 92 92 92 30 <br />. MS %Recovery 92 92 92 100 <br /> Dup Result 94 94 94 31 <br /> MSD %Recov 94 94 94 103 <br /> RPD 22 22 22 33 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# BLK012997 BLK012997 BLK012997 BLK012997 <br /> Prepared Date 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Analyzed Date 1/29/97 1/29/97 1/29/97 1/29/97 <br /> Instrument 10 # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Cone Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result 92 92 93 30 <br /> LCS % Recov 92 92 93 100 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Nate <br /> The LCS is a control sample of known,interferent-tree matrix that is analyzed using the same reagents, <br /> • SEQUOIA ANALYTICAL 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 /> G— terference,the LCS recovery is to be used to validate the batch <br /> heila Flynn <br /> Protect Mana r **MS=Matrix Spike, MSD <br /> Duplicate, RPD=Relative%Difference 9701E07 5SS <2> <br />