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ICPMS daily performance check report, May 3, 2002

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Daily instrument calibration and performance verification log for ICPMS equipment conducted on May 3, 2002.

NYC-WTC_000052963–000053092

Folder label: “ICPMS 5/3/02

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NYC 9/11 Public Portal Document

WESTCHESTER COUNTY DEPT OF LABS AND RESEARCH Method 200.8 - Summary Report Sample ID: LFB 50 AND 4 PPB Hg Sample Date/Time: Friday, May 03, 2002 10:49:17 Sample Type: Sample Sample Description: Number of Replicates: 3 Method File: c:\winnt\profiles\lrd1\elandata\Method\_NEWN.mth Dataset File: c:\winnt\profiles\lrd1\elandata\Dataset\new york city\LFB 50 AND 4 PPB Hg.722 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 27314.914 0.444 0.050 51.56963 1.38 ug/L > Sc-1 45 550336.902 1.738 550336.902 ug/L Cr 52 557105.329 2.178 0.997 48.70391 3.68 ug/L Cr 53 65987.791 3.325 0.118 49.26588 2.08 ug/L Mn 55 893249.145 1.469 1.619 48.42055 2.91 ug/L Ni 60 132087.419 1.298 0.240 51.06871 1.56 ug/L Cu 63 272382.074 2.018 0.494 49.93209 1.69 ug/L Cu 65 136148.354 1.091 0.247 49.39373 2.81 ug/L ’ Zn 66 89329.061 1.882 0.837 49.30092 1.56 ug/L Zn 67 15926.767 1.564 0.149 48.71123 1.88 ug/L Zn 68 70047.529 0.213 0.656 51.85771 0.66 ug/L > Ge 72 105355.032 0.698 105355.032 ug/L As 75 115922.247 0.335 1.024 50.68265 0.47 ug/L Se 77 10695.478 3.537 0.091 50.57353 3.98 ug/L Se 82 14531.418 1.459 0.109 50.90022 1.64 ug/L Ag 107 514379.643 1.263 0.386 48.81497 1.83 ug/L Cd 111 137716.660 0.403 0.103 49.97534 1.24 ug/L Cd 114 312091.188 2.011 0.234 49.40026 2.86 ug/L > In 115 1330702.417 0.845 1330702.417 ug/L Sb 121 440332.901 0.684 0.331 49.31873 0.47 ug/L Sb 123 347797.281 0.708 0.261 51.33979 1.53 ug/L ' Ba 135 130749.265 1.287 0.073 50.60378 1.33 ug/L Ba 137 226887.827 3.193 0.127 51.92590 3.49 ug/L Ho 165 1821188.056 1.343 0.069 ug/L > Tb 159 1784848.806 0.344 1784848.806 ug/L Hg 201 4940.392 1.705 0.003 4.01323 1.58 ug/L Hg 202 11621.206 0.679 0.006 4.10205 0.65 ug/L TI 205 1300375.235 3.186 0.728 52.37720 3.45 ug/L Pb 208 1750028.300 1.133 0.979 49.88587 1.22 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 89.792 Cr 52

Sample ID: LFB 50 AND 4 PPB Hg Report Date/Time: Friday, May 03, 2002 10:51:41 Page 1

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