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Sequoia 660 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (415)364 9233 <br /> 404 N Wiget Lane Walnut Creck CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0140 <br /> Smith Environmental Client Project ID' 21255/94-273-94-10 <br /> ' 441 N Whisman, Bldg 23 Matrix LIQUID <br /> ' 4 Mountain View, CA 94043 <br /> 'Attention Rich Garlow Work Order# 9702742 01-05 Reported Feb 26, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO22097BTEX07A GCO22097BTEX07A GCO22097BTEX07A GCO22097BTEX07A <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.Porter A.Porter A.Porter A.Porter <br /> MS/MSD# 970282405 970282405 970282405 970282405 <br /> ' Sample Cone : N D N D N D N D <br /> Prepared Date: 2/20/97 2/20/97 2/20/97 2/20/97 <br /> Analyzed Date 2/20/97 2/20/97 2/20/97 2/20/97 <br /> ' Instrument I D #, GCHP7 GCHP7 GCHP7 GCHP7 <br /> Cone Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 10 10 10 32 <br /> MS %Recovery 100 100 100 107 <br /> Dup. Result 10 10 10 33 <br /> MSD % Recov: 100 100 100 110 <br /> RPD 00 00 00 31 <br /> RPD Li mit 0-25 0-25 0-25 G-25 <br /> LCS# BLK022197 BLK022197 BLK022197 BLK022197 <br /> 1 Prepared Date 2/20/97 2/20/97 2/20/97 2/20/97 <br /> Analyzed Date: 2/20/97 2/20/97 2/20/97 2/20/97 <br /> Instrument I.D#: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Cork Spiked. 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result 99 99 10 3a <br /> LCS % Recov: 99 99 100 100 <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-free matrix that is analyzed using the same reagents, <br /> SEQUOIA AALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 /> Sheila rlynn IL <br /> Project Manager *"MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9702742 SSS <1> <br />