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Water metal analysis results, April 8, 2002

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Laboratory report from Westchester County Dept of Labs and Research detailing Method 200.8 metal concentrations in water samples dated April 8, 2002.

NYC-WTC_000078316–000078395

Folder label: “ICPMS 4/8/02”

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NYC 9/11 Public Portal Document

WESTCHESTER COUNTY DEPT OF LABS AND RESEARCH Method 200.8 - Summary Report Sample ID: CeV STD2 60 PPB Sample Date/TIme: Monday, April 08, 2002 15:41:35 Sample Type: Sample Sample Description: Number of Replicates: 3 Method File: d:\elandata\Method\NEWQ200.8.mth Dataset File: d:\elandata\Dataset\NEWQ\NEWQ\CCV STD2 60 PPB.337 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 r Be 9 27986.963 1.031 0.056 64.80516 3.29 ug/L i> Se-I 45 501129.511 2.326 501129.511 ug/L I Cr 52 556682.203 1.943 1.096 58.47224 1.95 ug/L I Cr 53 66317.366 1.331 0.132 58.81236 2.52 ug/L 1 Mn 55 893595.509 1.378 1.782 59.57457 1.98 ug/L Ni 60 138959.655 3.009 0.277 59.36552 2.87 ug/L I Cu 63 316982.185 1.819 0.632 59.39133 0.52 ug/L L Cu 65 156616.984 1.502 0.312 60.45660 1.87 ug/L r Zn 66 102055.433 1.690 1.057 61.20945 2.11 ug/L I Zn 67 18071.129 2.061 0.187 60.97761 2.22 ug/L 1 Zn 68 74138.174 1.106 0.768 59.87095 2.17 ug/L i> Ge 72 96176.410 1.251 96176.410 ug/L I As 75 117593.449 1.377 1.220 60.29983 2.53 ug/L I Se 77 9813.393 1.531 0.101 59.85228 1.78 ug/L L Se 82 13568.588 0.865 0.139 60.97454 2.15 ug/L r Ag 107 657509.064 1.469 0.489 60.18357 1.59 ug/L I > In 115 1344009.889 0.904 1344009.889 ug/L I Sb 121 545391.406 0.207 0.406 59.56234 0.92 ug/L L Sb 123 423588.687 1.171 0.315 60.09486 0.34 ug/L r Ba 135 161024.906 0.846 0.088 59.36306 0.63 ug/L I Ba 137 282680.630 1.731 0.154 59.52857 1.53 ug/L I Ho 165 1824125.681 1.882 -0.008 ug/L |> Tb 159 1833800.886 0.920 1833800.886 ug/L I Tl 205 1516604.970 0.904 0.827 61.11585 1.52 ug/L L Pb 208 2038208.316 0.386 1.111 60.82335 0.77 ug/L

QC Calculated Values Analyte Mass QC Std % Recovery Int Std % Recovery Spike % Recovery Dilution % Diff Dup. Rei. % Diff r Be 9 |> Sc-1 45 95.193 I Cr 52 I Cr 53 I Mn 55 I Ni 60 I Cu 63

Sample ID: cev STD2 60 PPB Report Date/Time; Monday, April 08, 2002 15:43:41 Page 1

NYC-WTC_000078394

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