Selenium (Se) laboratory analysis results, Oct 2001

NYC 9/11 Public Portal Document

Calibration data for Se Entered Calculated Concentration Concentration Standard Mean Signal Standard ID (Pk Area) (gg/L) (gg/L) Deviation %RSD Calib Blank 0.000 -0.5193 S2 0.020 2 2.278 S4 0.035 4 4.220 S6 0.051 6 6.519 S8 0.061 8 7.789 SIO 0.075 10 9.714 Correlation Coefficient; 0.99440 (\s lope: 0.00729 Intercept: 0.004

The calibration curve has been edited. The calibration curve has been edited.

Element: Se Seq. No.; 76 AS Loc.; 38 Date; 10/05/2001 Sample ID: S2 fill dispensed: 26 from 36, 5 from 37, 4 from 38 gli dispensed; 26 from 36, 5 from 37, 4 from 38

Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd -Bkgnd Time Peak # /zg/L gg/L Signal Area Height Area Height Stored 1 0.022 0.021 0.038 0.028 0.019 13:45:05 No Standard number 1 applied. [2] , Correlation Coefficient: 0.9953 Slope: 0.0072 The calibration curve has been edited.

Element: Se Seq. No.: 77 AS Loc.: 38 Date: 10/05/2001 Sample ID: S6 Illi dispensed: 18 from 36, 5 from 37, 12 from 38 HJa dispensed: 18 from 36, 5 from 37, 12 from 38

Repl SanpleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # gg/L gg/h Signal Area Height Area Height Stored 1 0.052 0.051 0.087 0.036 0.031 13:51:17 No Standard number 3 applied. [6] Correlation Coefficient: 0.9929 Slope: 0.0072 The calibration curve has been edited.

Element: Se Seq. No.: 78 AS Loc.: 38 Date: 10/05/2001 Sample ID: S8 /zL dispensed: 14 from 36, 5 from 37, 16 from 38 IjlIj dispensed: 14 from 36, 5 from 37, 16 from 38

Repl San^JleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # gg/L gg/L Signal Area Height Area Height Stored 1 0.059 0.058 0.117 0.042 0.041 13:56:20 No Standard number 4 applied. [8] Correlation Coefficient: 0.9872 Slope: 0.0074

Page 3

NYC-WTC_000065332