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Sequoia 680 Chesapeake Drive Redwood Cry,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 4 6) 404 N Wiget lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 %73 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> r{A+'r+v • r,., f r x r .v .+ ,,,r r r r ,rNr rrrrw n rn r.`.'6:r nr�' <br /> fwniv.Y r,yi" it,'w+n vSlrr rr rr anA v'.uS`i wWxr wr.w.vw <br /> Enviros r + Client Project' <br /> ID $helk 6131 Pacific, Stockton <br /> x{270 Perkins Ave Matrix Solid <br /> "Sonoma, CA 95476 <br /> ';Attention Joe Neely Work Order# 9707182-01 Reported Jul 18, 19971• <br />� f$, v4?'mrr xr,v+rlw.v v. +w x r „r ,l{rr,,,knY+v++++ r ,.v rrt ,rr v +r+rrY,rr v r nv„vv+ry rrr,• r r ,rr r vu r r <br /> GUALIT_Y_CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> CC Batch#:-ME0709976010MDE—ME0709976010MDEM E0709976010 MOE __ME0709976010MDE <br /> Analy Method: EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep. Method. EPA 3050 EPA 3050 EPA 3050 EPA 3050 <br /> Analyst: R Butler R Butler R Butler R Butler <br /> MS/MSD#- 9706FG405 97061`6405 97061`6405 9706F6405 <br /> Sample Conc : N D 16 610 51 <br /> Prepared Date 7/9/97 7/9/97 7/9/97 7/9/97 <br /> Analyzed Date, 7/9/97 7/9/97 7/9/97 7/9/97 <br /> Instrument I D #: MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc.Spiked: 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> Result 33 38 740 75 <br /> MS % Recovery 66 73 260 48 <br /> Dup Result: 36 41 810 92 <br /> MSD % Recov.. 72 79 400 82 <br /> RPD 87 76 90 20 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS #- BLK070997 BLK070997 BLK070997 ELK070997 <br /> Prepared Date 7/9/97 7/9/97 7/9/97 7/9/97 <br /> Analyzed Date 7/9/97 7/9/97 7/9/97 7/9/97 <br /> Instrument I.D #. MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc. Spiked- 50 mg/Kg 50 mg/Kg 50 mg/Kg 50 mg/Kg <br /> LCS Result: 51 50 52 52 <br /> LCS % Recov: 102 100 104 104 <br /> 80-120 80-120 60-120 80-120 <br /> LCS 80-120 80-120 80-120 80-120 <br /> Control Limits <br /> Please Note <br /> The LCS Is a control sample of known,interferent tree matrix that 1s analyzed using the same reagents, <br /> SEQUOIA ALYTICAL 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 procedur� <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to maty <br /> interference,the LCS recovery is to be used to validate the batch <br /> regory <br /> Project Manager "*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9707162 EEE <2> <br />