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r <br /> Se uoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> ,—!D— <br /> q 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)98a-9673 <br /> Analytical 1455 <br /> Striker Avenge Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Bozzano Property <br /> 1260 Graphics Drive Matrix Solid <br /> Modesto, CA 95351-1502 <br /> Attention Tam Lutterman Worst Order# 9806E06-01-10 Reported Jul 7, 1998 <br /> QUALITY CONTROL. DATA REPORT <br /> Analyte MTBE <br /> QC Batch# MS062498MTBEH6A <br /> Analy Method EPA 8260 <br /> Prep. Method N A <br /> Analyst M Williams <br /> MS/MSD # <br /> Sample Cone <br /> Prepared Date <br /> Analyzed Date <br /> Instrument I D # <br /> Cone Spiked <br /> Result. <br /> MS % Recovery <br /> isDup Result- <br /> MSD % Recov <br /> RPD <br /> RPD Limit <br /> LCS# LCS062498 <br /> Prepared Date 6/24/98 <br /> Analyzed Date 6/27/98 <br /> Instrument I D # H6 <br /> Cone Spiked 2500Ng/Kg <br /> LCS Result 2500 <br /> LCS % Recov 100 <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 /> EOUOIA 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 /> an Klm <br /> Project M ager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9806E06 AAA <3> <br />