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SEQUOIA ANALYTICAL <br /> I zt _ <br /> 680 Chesapeake drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> RESNA Client Project ID: W0623, Falcon Fire Station#2 <br /> x 1710 Main Street <br /> ' Escalon, CA 95320 <br /> {Attentton .John Lane OC Sample Group: 2044327-8 Reported: May 7, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> J' ANALYTE Hexwwant <br /> Cadmium Chromium NGekei Zinc Lead Chromium <br /> Method: EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 7196 <br /> Analyst: M Mrstry M Mrstry M Nstry M Mistry M tistry V Ankarbs <br /> ' Reporting Units: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Apr 3o, 1992 Apr 30. 1992 Apr 30, 1992 Apr 30, 1992 Apr 30, 1992 Apr 24, 1492 <br /> QC Sample#- 204-4852 204-4652 204-48W 204-4aW 2044M 204,3186 <br /> Sample Conc: N D 12 12 44 8.3 N D. <br /> Spike Conc. <br /> Added: 5o 5o 5o 50 5o 5.0 <br /> ' Conc. Matrix <br /> Spike: 50 62 61 94 58 53 <br /> ' Matrix Spike <br /> % Recovery: 100 100 98 100 99 106 <br /> Conc. Matrix <br /> Spike Dnp.: 51 63 62 96 59 54 <br /> Matnx Spike <br /> Duplicate <br /> % Recovery: 102 102 100 104 101 108 <br /> ' Relative <br /> •.6 Difference: 2.0 16 16 21 1.7 19 <br /> I <br /> EQUOIA ANALYTICAL %Peco"ry- Conc of M S -Conc of Sample x 100 <br /> Spike Cone Added <br /> Flsfabve%Ofference Conc of M S -Conc of M S D x 100 <br /> (Conc of M S + Cone of M S 0) /2 <br /> ' <br /> *'\ 0J <br /> ect Manager 2044327 war a 12> <br />