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ICPMS daily performance check report, April 10, 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_000040452–000040596

Folder label: “ICPMS 4/10/02

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NYC 9/11 Public Portal Document

WESTCHESTER COUNTY DEPT OF LABS AND RESEARCH Method 200.8 - Summary Report Sample ID: QCS 50 PPB Sample Date/Time: Wednesday, April 10,2002 09:57:23 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 PPB.425 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 23813.734 2.591 0.046 49.83835 2.39 ug/L > So-1 45 518846.377 0.205 518846.377 ug/L Cr 52 499127.939 1.700 0.948 51.66291 1.92 ug/L Cr 53 57950.052 1.463 0.110 50.88916 1.69 ug/L Mn 55 782318.552 2.223 1.503 51.04489 2.39 ug/L Ni 60 122723.696 0.245 0.236 51.41473 0.37 ug/L Cu 63 279010.643 1.591 0.536 50.70086 1.72 ug/L Cu 65 137105.565 0.907 0.264 51.10869 1.10 ug/L Zn 66 90902.182 1.446 0.909 52.54799 0.78 ug/L Zn 67 15935.447 0.707 0.159 51.96628 1.24 ug/L Zn 68 65614.612 1.126 0.656 51.55434 2.14 ug/L Ge 72 99056.459 1.314 99056.459 ug/L As 75 103084.285 1.389 1.037 51.78154 0.12 ug/L Se 77 8727.608 1.269 0.087 51.55112 1.33 ug/L Se 82 11696.638 1.731 0.116 51.26315 0.78 ug/L Ag 107 571868.898 1.738 0.414 51.15249 1.47 ug/L In 115 1379156.743 1.290 1379156.743 ug/L Sb 121 483231.258 1.394 0.350 51.74649 0.39 ug/L Sb 123 377424.917 2.056 0.274 52.03223 1.10 ug/L Ba 135 142242.503 1.865 0.076 50.55681 0.41 ug/L Ba 137 246854.310 1.622 0.131 50.33803 0.58 ug/L Ho 165 1872053.215 0.756 0.136 ug/L > Tb 159 1881104.019 1.494 1881104.019 ug/L n 205 1328762.617 0.485 0.706 51.23808 1.13 ug/L Pb 208 1752806.611 0.272 0.931 49.91016 1.74 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 92.229 Cr 52 Cr 53 Mn 55 NI 60 Cu 63

Sample ID: QCS 50 PPB Report Date/Time: Wednesday, April 10,2002 09:59:31 Page 1

NYC-WTC_000040465

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