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Sequoia <br /> � <br /> JegLaO�a 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> .Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Sozzano Property <br /> 1260 Graphics Drive Matrix Liquid <br /> Modesto, CA 95351-1502 <br /> Attention Tom Lutterman Work Order# 9806E06-15-16 Reported Jul 7, 1998 <br /> QUALITY CONTROL. DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS062798MTBEH6A <br /> Analy Method EPA 8260 <br /> Prep Method N A <br /> Analyst M Williams <br /> MS/MSD# 9806H0205 <br /> Sample Conc N D <br /> Prepared Date N A <br /> Analyzed Date 6/27/98 <br /> Instrument I D # H6 <br /> Conc Spiked 50 ug/L <br /> Result 52 <br /> 0M % Recovery 104 <br /> Dup Result 49 <br /> MSD % Recov 98 <br /> RPD 59 <br /> RPD Limit 0-25 <br /> LCS # LCS062898 <br /> Prepared Date N A <br /> Analyzed Date 6/28/98 <br /> Instrument I D # H6 <br /> Conc Spiked 50ug/L <br /> LCS Result 47 <br /> LCS % Recov 94 <br /> 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 /> EQUOIA 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 /> interference,the LCS recovery is to be used to validate the batch <br /> anKI <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9806E06 AAA <5> <br />