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Potassium sample log, WTC site, Oct 30 2001

Machine-extracted title · confidence 90%

Log entry for potassium sample processing activities at the World Trade Center site on October 30, 2001.

NYC-WTC_000065852–000065884

Folder label: “K 10/30/01

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NYC 9/11 Public Portal Document

Element: K Seq. No.: 8 AS Loc.: Date: 10/30/2001 Sample ID: S2000

Repl SampleConc StndConc BlnkCorr Time # gg/L fig/Z Signal 1 0.380 11:39:18 2 0.386 11:39:25 3 0.379 11:39:33 4 0.381 11:39:40 Mean: 0.382 SD : 0.003 %RSD: 0.77 The calibration curve may not be linear. Standard number 6 applied. [2000] Correlation Coefficients .9989 Slope: 0.0002

Element: K Seq. No.: 9 AS Loc.; Date: 10/30/2001 Saiiple ID: QCS

Repl SampleConc StndConc BlnkCorr Time # Mg/L gg/L Signal 1 514.2 514.2 0.106 11:40:14 2 507.4 507.4 0.105 11:40:22 3 520.8 520.8 0.108 11:40:29 4 508.7 y 508.7 0.105 11:40:36 Mean: 512.8*/ 512.8 0.106 SD : 6.092 6.092 0.001 %RSD: 1.19 1.19 1.09

Element: K Seq. No.: 10 AS Loc.: Date: 10/30/2001 Sanple ID: Blk

Repl SampleConc StndConc BlnkCorr Time # Mg/L Mg/L Signal 1 -13.14 -13.14 0.006 11:40:55 2 -26.64 -26.64 0.004 11:41:02 3 -18.96 -18.96 0.005 11:41:09 4 -31.99 -31.99 0.003 11:41:17 Mean: -22.68 -22.68 0.004 SD : 8.312 8.312 0.002 %RSD: 36.65 36.65 35.96

Element: K Seq. No.: 11 AS Loc.: Date: 10/30/2001 Sample ID: 24872

Repl San^leConc StndConc BlnkCorr Time # gg/L Mg/L Signal 1 566.8 566.8 0.116 11:41:38 2 565.2 565.2 0.116 11:41:45 3 568.8 568.8 0.117 11:41:53 4 563.7 563.7 0.116 11:42:00 Mean: 566.1 566.1 0.116 SD : 2.183 2.183 0.000 %RSD: 0.39 0.39 0.36

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NYC-WTC_000065855Source: NYC Law Department, mirrored locally

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