Sample batch list with IDs, April 9, 2002

NYC 9/11 Public Portal Document

•Element: Sn Seq. No.: 18 AS Loc.: 7 Date: 04/09/2002 Sample ID: 7484dup uL dispensed: 13 from 36, 5 from 37, 3 from 38, 4 from 7 Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 140.8 6.94 0.059 0.060 0.174 0.022 0.051 10:55:03 No Recovery is 93.9%

Element: Sn Seq. No.: 19 AS Loc.: 8 Date: 04/09/2002 Sample ID: 7485 uL dispensed: 8 from 36, 5 from 37, 12 from 8 Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 -4.988 -4.988 0.001 0.002 0.008 0.015 0.037 10:57:43 No

Element: Sn Seq. No.: 20 AS Loc.: 9 Date: 04/09/2002 Sample ID: 7486 uL dispensed: 8 from 36, 5 from 37, 12 from 9 Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 -5.019 -5.019 0.001 0.002 0.007 0.017 0.038 11:00:25 No

Element: Sn Seq. No.: 21 AS Loc.: 2 Date: 04/09/2002 Sample ID: IPC uL dispensed: 8 from 36, 5 from 37, 12 from 2 Repl SampleConc /StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L / ug/L Signal Area Height Area Height Stored 1 110.0 / 110.0 0.128 0.129 0.403 0.035 0.082 11:03:06 No QC value within specified limits.

Element: Sn Seq. No.: 22 AS Loc.: 3 Date: 04/09/2002 Sample ID: CB uL dispensed: 8 from 36, 5 from 37, 12 from 3 Repl SampleConc / StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L / ug/L Signal Area Height Area Height Stored 1 -5.526 / -5.526 0.001 0.002 0.005 0.011 0.030 11:05:42 No

Element: Sn Seq. No.: 23 AS Loc.: 10 Date: 04/09/2002 Sample ID: 7487 uL dispensed: 8 from 36, 5 from 37, 12 from 10 Repl SampleConc/ StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L J ug/L Signal Area Height Area Height Stored 1 -3.846 V -3.846 0.002 0.004 0.008 0.015 0.033 11:08:21 No

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NYC-WTC_000041236