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ICPMS daily performance check report, April 22, 2002

Machine-extracted title · confidence 95%

Daily instrument performance verification log for ICPMS analysis including intensity and standard deviation data for multiple elements.

NYC-WTC_000040871–000040923

Folder label: “ICPMS 4/22/01

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NYC 9/11 Public Portal Document

WESTCHESTER COUNTY DEPT OF LABS AND RESEARCH Method 200.8 - Summary Report Sample ID: QCS 50 AND 4 PPB Sample Date/Time: Monday, April 22,2002 12:15:48 Sample Type: Sample Sample Description: Number of Replicates: 3 Method File: d:\elandata\Method\NEWQ200.8.mth Dataset File: d:\elandata\Dataset\NEWQ\NEWQ\QCS 50 AND4PPB.497 Aliquot Volume (mL): Diluted To Volume (mL):

Concentration Results Analyte Mass Meas. Intens. Mean Meas. Intens. RSD Net Intens. Mean Cone. Mean Cone. RSD Sample Unit Be 9 16664.428 1.371 0.035 52.01067 0.56 ug/L Se-1 45 469449.661 1.215 469449.661 ug/L Cr 52 435117.331 1.505 0.910 49.05794 0.72 ug/L Cr 53 51918.377 1.698 0.109 48.74445 2.32 ug/L Mn 55 672534.513 2.469 1.429 49.40625 2.55 ug/L Ni 60 110265.162 1.082 0.234 48.66138 0.92 ug/L Cu 63 251235.542 0.827 0.534 48.72367 1.59 ug/L Cu 65 124802.513 1.456 0.265 48.87704 2.09 ug/L Zn 66 79061.576 2.603 0.860 51.45319 1.57 ug/L Zn 67 14476.666 2.193 0.157 51.45935 1.54 ug/L Zn 68 59289.326 1.421 0.645 51.42454 0.78 ug/L Ge 72 91164.430 1.066 91164.430 ug/L As 75 92788.417 0.512 1.017 50.77172 0.59 ug/L Se 77 8473.549 0.353 0.092 51.10480 0.83 ug/L Se 82 10177.798 2.501 0.111 50.82706 1.45 ug/L Ag 107 540290.239 0.871 0.405 52.46147 0.55 ug/L in 115 1331349.681 1.394 1331349.681 ug/L Sb 121 450616.517 1.476 0.338 51.11605 1.15 ug/L Sb 123 346706.091 1.927 0.260 50.71301 1.62 ug/L Ba 135 137847.280 0.289 0.074 50.10125 1.26 ug/L Ba 137 238097.239 1.063 0.128 49.77200 0.54 ug/L Ho 165 1846162.746 1.174 -0.001 ug/L > Tb 159 1865705.247 1.534 1865705.247 ug/L Hg 201 5080.137 2.915 0.003 4.08372 1.91 ug/L Hg 202 11451.323 1.457 0.006 4.12719 1.92 ug/L Tl 205 1291142.633 1.381 0.691 50.46147 0.31 ug/L Pb 208 1714354.558 0.909 0.918 49.72382 1.54 ug/L

QC Calculated Values Analyte Mass QC Std % Recovery Int Std % Recovery Spike % Recovery Dilution % Diff Dup. Rei. % Diff ' Be 9 > Sc-1 45 110.619 Cr 52 Cr 53 Mn 55

Sample ID: QCS 50 AND 4 PPB Report Date/Time: Monday, April 22, 2002 12:18:03 Page 1

NYC-WTC_000040884

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