Potassium sample log, WTC site, Oct 30 2001

NYC 9/11 Public Portal Document = SS5SSSSBSSZSSSSSSBSS = = S:SSSSSSSS38S = SSSSSSSSSSSS:SS = SSSS8SS = = SSSSSa = ZSaSSSSSSSSSSSBSS58SS:SSSSSSSSSSSS = S = SSSBSSSS

Element: K Seq. No.: 44 AS hoc.: Date: 10/30/2001 ■ Sample ID: 25791

Repl San^jleCono StndCono BlnkCorr Time # Aig/L Signal 1 2019 2019 0.392 12:06:42 2 2015 2015 0.391 12:06:50 3 2008 2008 0.390 12:06:57 4 2014 2014 0.391 12:07:04 Mean: 2014 2014 0.391 SD : 4.314 4.314 0.001 %RSD: 0.21 0.21 0.21

Element: K Seq. No.: 45 AS Log.: Date: 10/30/2001 Sanple ID: 25792

Repl San^leCono StndCono BlnkCorr Time # Mg/L Signal 1 523.9 523.9 0.108 12:07:27 2 569.5 569.5 0.117 12:07:35 3 517.9 517.9 0.107 12:07:42 4 517.2 517.2 0.107 12:07:49 Mean: 532.1 532.1 0.110 SD : 25.12 25.12 0.005 %RSD: 4.72 4.72 4.35

Element: K Seq. No.: 46 AS Log.: ' Date: 10/30/2001 San^Jle ID: 25793

Repl San^jleConc StndConc BlnkCorr Time # Mg/L Signal 1 506.5 506.5 0.105 12:08:12 2 499.4 499.4 0.103 12:08:19 3 495.7 495.7 0.103 12:08:26 4 500.6 500.6 0.104 12:08:33 Mean: 500.5 500.5 0.104 SD : 4.484 4.484 0.001 %RSD: 0.90 0.90 0.82

Element: K Seq. No.: 47 AS Log.: Date: 10/30/2001 Sanple ID: 25830

Repl SanqpleCono StndCono BlnkCorr Time # Mg/L gg/L Signal 1 522.8 522.8 0.108 12:08:57 2 518.6 518.6 0.107 12:09:04 3 533.7 533.7 0.110 12:09:11 4 540.0 540.0 0.111 12:09:18 Mean: 528.8 528.8 0.109 SD : 9.820 9.820 0.002 %RSD: 1.86 1.86 1.71

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