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Document / 36 pages

Potassium sample log, WTC site, Nov 18 2001

Machine-extracted title · confidence 90%

Log entry for potassium sample processing activities at the World Trade Center site on November 18, 2001.

NYC-WTC_000065920–000065955

Folder label: “K 11/18/01

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NYC 9/11 Public Portal Document

Element: K Seq. No.: 128 AS Log.: Date: 11/18/2001 Sample ID: 27627

Repl SampleConc StndCono BlnkCorr Time # pg/i* Mg/i* Signal 1 534.9 534.9 0.109 13:20:32 2 532.5 532.5 0.109 13:20:39 3 530.2 530.2 0.108 13:20:46 4 534.4 534.4 0.109 13:20:53 Mean: 533.0 533.0 0.109 SD : 2.152 2.152 0.000 %RSD: 0.40 0.40 0.41

Element: K Seq. No.: 129 AS Log.: Date: 11/18/2001 Sample ID: 27628

Repl SampleConc StndConc BlnkCorr Time # Mg/L M9/L Signal 1 515.4 515.4 0.105 13:21:11 2 526.6 526.6 0.107 13:21:18 3 523.8 523.8 0.107 13:21:25 4 529.7 529.7 0.108 13:21:32 Mean: 523.9 523.9 0.107 SD : 6.134 6.134 0.001 %RSD: 1.17 1.17 1.18

: = SBBBSSSS:SSaS3SSS=SSSSSZSSSS:

Element: K Seq. No.: 130 AS Log.: Date: 11/18/2001 Sanple ID: QCS

Repl San^deConc StndConc BlnkCorr Time # Mg/L Signal 1 529.2 529.2 0.108 13:21:53 2 523.5 523.5 0.107 13:22:00 3 532.2 532.2 0.109 13:22:07 4 537.7 537.7 0.110 13:22:14 Mean: 530.6 530.6 0.108 SD : 5.913 5.913 0.001 %RSD: 1.11 1.11 1.12

:SSS&3B;SSSS35

Element: K Seq. No.: 131 AS Log.: Date: 11/18/2001 Sanple ID: Blk

Repl SampleConc StndConc BlnkCorr Time # Mg/L M9/L Signal 1 -28.43 -28.43 -0.007 13:22:39 2 -30.16 -30.16 -0.007 13:22:46 3 -31.88 -31.88 -0.007 13:22:53 4 -28.91 -28.91 -0.007 13:23:00 Mean: -29.85 -29.85 -0.007 SD : 1.539 1.539 0.000 %RSD: 5.16 5.16 4.54

Page 36

NYC-WTC_000065955

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NYC-WTC_000065955Source: NYC Law Department, mirrored locally

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