Selenium lab results, WTC samples, Oct 1 2001

NYC 9/11 Public Portal Document

'.Calibration data for Se Entered Calculated Mean Signal Concentration Concentration Standard Standard ID (Pk Area) (Mg/L) (/tg/L) Deviation %RSD Calib Blank 0.000 -1.728 S5 0.019 5.00 6.525 SIO 0.031 10.00 11.67 sVs 0.043 15.00 17.04 S2> 0.050 20.00 19.74 Correlat' in Coefficient; 0.99131 Slope; 0.00231 Intercept: 0.006

The calibration curve has been edited.

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Element: Se Seq.\No.: 92 AS Loc.: 36 Date; 10/01/2001 San^le ID: Calib Blank fili dispensed: 20 from\36, 5 from 37, 20 from 36

Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # gg/L gg/L \ Signal Area Height Area Height Stored 1 \ 0.001 0.004 0.013 0.010 0.009 16:28:48 No Auto-zero performed.

Element: Se Seq. No.: 93 AS Loc.: 10 Date: 10/01/2001 Sairple ID; 21663 \ gL dispensed: 20 from 36, 5 from 20 from 10

Repl San^leConc StndConc BlnkCor: Peak Peak Bkgnd Bkgnd Time Peak # gg/L Mg/b Signal Area Height Area Height Stored 1 -0.002 .0.002 0.008 0.013 0.008 16:31:26 No

Element; Se Seq. No.: 94 AS Loc.: Date: 10/01/2001 San^le ID: S5 \ Illi dispensed: 15 from 36, 5 from 37, 20 from iQ, 5 from 38

Repl SampleConc StndConc BlnkCorr Peak P\ak Bkgnd Bkgnd Time Peak # gg/L Mg/b Signal Area He^ht Area Height Stored 1 0.013 0.017 o.oai 0.021 0.014 16:34:19 No Addition number 1 applied. [5.00] Correlation Coefficient: 1.0000 Slope :\0.0025

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Element: Se Seq. No.: 95 AS Loc.: 38 Date: 10/01X2001 Sample ID: SIO lilt dispensed: 10 from 36, 5 from 37, 20 from 10, 10 from 38

Repl SampleConc»..-StndConc BlnkCorr Peak Peak Bkgnd Bkgnd —Time Peak # Mg/L Mg/L Signal Area Height Area Might Stored 1 0.032 0.036 0.048 0.021 \oi8 16:37:10 No Addition number 2 applied. [10.00] Correlation Coefficient: 0.9929 Slope: 0.0032

NYC-WTC_000065315