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. ; Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9133 <br /> Analytical 404 N V(rget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> 819 Sink,Avenue,Swte 8 Sammento,CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> k .a'+�"` ? } ..,.s` wi rr..-,-✓.a..„�...tn�,a':c'tiGi,.cfi+ t <br /> Wlncr' Client Project ID 5liell, N EI Dorado <br />*6dri� eit, <br /> ;Stockton, A"" { <br /> 050 Melody Lane, Ste 160 Matra Air <br /> Roseville, CA 95678 <br /> Attention Sudhakar Talankl QC Sample Group 5090175-176 Reported Sep 13, 1995 <br /> J t,;,ur •♦ Y r „ u jv , w r p f't^SNtiv �r'O'l' M "+r f Cr vrnw M"^h`+'l;nn*[rO4 xn,vu+^¢'^Y AJY,vv.,w vxrv+�v+++•f.ar .t- x rr $'}nnk rrrwy+4rn,rAr}'+' <br /> r, . n, ,, 4 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst, C Lee C Lee C Lee C Lee <br /> Concentration <br /> Spiked: 2.0 mg/m3 2.0 mg/m3 2.0 mg/ms 6 0 mg/m3 <br /> LCS Batch# LCS090795 LCS090795 LC-909M5 LCS090795 <br /> Date Prepared 9/7/95 9/7/95 9/7/96 9/7/95 <br /> Date Analyzed. 9/7/95 9/7/95 9/7/95 9/7/95 <br /> Instrument LD #* GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> L.CS % <br /> Recovery- 91 93 93 92 <br /> Control L.imrts 75-125 75-125 75-125 75-125 <br /> r,�{V<A r vF{.... 3} • r y"v ,7 AWN v'Yr . i4 3� �?r..t�r4hN .l� ot`x4:xoy�v^.,+fk.�Acwr,":p,h1^rr ' , 0�0 4y lnY°;;'>,r <br /> if rr}r++ry x+. r v vert ri..w 4.r,ivf+ r.X45 of r,rry rnviPm}n ra alk i,w.x..vF+fiYNN.AS unv.4v.Q}5} S}+.:, ..tiv�lfwirR iN S.:Sv..wf.4rty7.r SiS3f J...t <br /> MS/MSD <br /> Batch# SS090795 BS090795 BS090795 BS090795 <br /> Date Prepared: 9/7/95 9/7/95 9/7/95 9/7/95 <br /> Date Analyzed: 9/7/95 9/7/95 9/7/95 9/7/95 <br /> Instrument I D,#- GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> %Recovery: 84 86 86 86 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 84 a5 85 84 <br /> Relative% <br /> Difference. 00 12 12 2.4 <br /> - EQUOIA ANALYTICAL. Please Note <br /> The LCS to a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> preparation and anaiyl,cal methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the QC Ilmrts for MS/MSD's are advisory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager 5090175 FUG <2> <br />