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680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> Sequoia 404 N W+bet Lane Walnut Creek, CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> Analytical 919 Striker Avenue Suitt 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Smith Environmental Client Project ID 20778, 94-273-94-10 <br /> 441 N Whlsman, Bldg 23 Matrix Liquid <br /> Mountain View, CA 94043 <br /> Attention Rich Garlow Work Order# 9512715-03 Reported Dec 26, 1996 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' Analyte MTBE <br /> QC Batch# MS1218968260F3A <br /> Analy Method EPA 8260 <br /> ' Prep Method- N/A <br /> Analyst L Duong <br /> ' MS/MSD # 961273201 <br /> Sample Conc N D <br /> Prepared Date 12/18/96 <br /> Analyzed Date 12/18/96 <br /> ' Instrument I D #. f=3 <br /> Conc Spiked sous/L <br /> Result 46 <br /> MS % Recovery 92 <br /> Dup Result* 44 <br /> ' MSD %Recov 88 <br /> RPD 44 <br /> RPD Limit 125 <br /> LCS #- VB121896 <br /> Prepared Date 12/18/96 <br /> Analyzed Date 12/18/96 <br /> ' Instrument I D # F3 <br /> Conc Spiked 50pg/L <br /> LCS Result 46 <br /> LCS % Recov 92 <br /> ' MS/MSD 60-140 <br /> LCS 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 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 It <br /> the recovery of analytes from the matrix spike does not fatl within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Vytas Ankaltis <br /> "MS=Matrix Spike M50=MS Duplicate, RPD=Relative 96 Difference 9612715 SSS �2> <br /> Project Mana <br />