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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> ' 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5t0)988-9673 <br /> '14W Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)92 1-0 100 <br /> 0 <br /> �r`r r O r r rr ori+i e r n r.0 r.u ✓ ✓r+✓✓ ✓✓ r✓v v{.+ ✓ J r✓r+{i .v <br /> J +r+v.uxr+v v+rt u ~ r r r�vr 4♦r + n++✓r r r+ toc{+ r x n.t rr r r r r rr F ri f rrr vIr r rrfrr rrr vry rrr x r f r.w r.xr� <br /> Blame Tech Services, inc ClientrPr" ect l )" rShell Skton/§7i 669-se.{ r <br /> 1680 Rogers Ave Matrix Liquid <br /> $-San Jose, CA 95112 $ <br /> ,-Attention Fran Thie Work Order# 9710593-12 Reported Oct 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: MTBE <br /> QC Batch#: MS101797MTBEF2A <br /> Analy Method: EPA 8260 <br /> Prep Method: N A. <br /> Analyst L Zhu <br /> MS/MSD # 971077806 <br /> Sample Cone N D <br /> Prepared Date: 10/17/97 <br /> Analyzed Date: 10/17/97 <br /> Instrument I.D.#: F2 <br /> Cone. Spiked: 50Ng/L <br /> Result: 64 <br /> MS % Recovery: 128 <br /> Dup. Result: 59 <br /> MSD % Recov.: 118 <br /> RPD: 81 <br /> RPD-Limit: ------ .0-25 <br /> «ri <br /> y r +r } r x <br /> 4 LCS #- VMB101797 <br /> Prepared Date: 10/17/97 <br /> Analyzed Date: 10/17/97 <br /> Instrument I D.#: F2 <br /> Cone. Spiked: 50Mg/L <br /> LCS Result: 60 <br /> LCS % Recov.: 120 <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 reagent <br /> *EILYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of samplfortified with known quantities of specific compounds and subjected to the entire analytical procedurethe recovery of analytes from the matrix spike does not fall within specified control limits due to matrixinterference,the LCS recovery is to be used to validate the batch <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference 9710591 BLA <7> <br /> kC�, <br />