Sample batch list with IDs, April 12, 2002

NYC 9/11 Public Portal Document

, Element: Sn Seq. No.: 30 AS Loc.: 16 Date: 04/12/2002 Sample ID: 8253 uL dispensed: 5 from 36, 5 from 37, 3 from 38, 12 from 16 Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 36.53 / 36.53 0.048 0.048 0.114 0.023 0.043 11:51:47 No Recovery is 73.1% outside of specified limits)

Element: Sn Seq. No.: 31 AS Loc.: 16 Date: 04/12/2002 Sample ID: 8253 uL dispensed: 16 from 36, 5 from 37, 4 from 16 Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 -9.551 -3.184 0.002 0.002 0.006 0.012 0.028 11:54:29 No

Element: Sn Seq. No.: 32 AS Loc.: 16 Date: 04/12/2002 Sample ID: 8253 uL dispensed: 13 from 36, 5 from 37, 3 from 38, 4 from 16 Repl SampleConc StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 137.7 / 45.91 0.059 0.059 0.133 0.021 0.044 11:57:18 No Recovery is 91.8%

Element: Sn Seq. No.: 33 AS Loc.: 2 Date: 04/12/2002 Sample ID: I PC uL dispensed: 8 from 36, 5 from 37, 12 from 2 Repl SampleConc/ StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # pg/L / pg/L Signal Area Height Area Height Stored 1 103.3 / 103.3 0.126 0.126 0.307 0.037 0.076 11:59:55 No QC value within.specified limits.

Element: Sn Seq. No.: 34 AS Loc.: 3 Date: 04/12/2002 Sample ID: CB uL dispensed: 8 from 36, 5 from 37, 12 from 3 Repl SampleCom StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 -4.801 -4.801 0.000 0.000 0.004 0.012 0.025 12:02:32 No

Element: Sn Seq. No.: 35 AS Loc.: 4 Date: 04/12/2002 Sample ID: LFB uL dispensed: 8 from 36, 5 from 37, 12 from 4 Repl SampleCong StndConc BlnkCorr Peak Peak Bkgnd Bkgnd Time Peak # ug/L ug/L Signal Area Height Area Height Stored 1 185.2 185.2 0.221 0.222 0.536 0.061 0.130 12:05:09 No QC value within pecified limits.

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NYC-WTC_000041264