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Contaminant of Potential Concern exceedance table, Unit 2A

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Table comparing contaminant levels before and after cleaning for Unit 2A, including dioxin, PAHs, asbestos, and lead.

NYC-WTC_000186138–000186172
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NYC 9/11 Public Portal Document

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Internal Review Draft

CONTAMINANT OF POTENTIAL CONCERN (COPC) EXCEEDANCE BY EVENT TABLE [ADD] - UNIT 3C, TEST 1 A, 3B

Cleanup Criteria I Pre-Cleaning | Post-First Cleaning [Post-Second Cleaning |Post-Third Cleaning i COPC Air Wipe MV Dioxin 0.001 ng/m3 4 ng/m2 6.2 PAH 0.2 ug/m3 300 ug/m2 1046.6 Asbestos 0.0009 f/cc n/a pL OL OL? OL PL PL OL Lead 1 ug/m3 25 ug/ft2 25 ug/ft2 750 .18g 26.9 48.7 135 431 39.4 MMVF 0.01 f/cc n/a 91.796 Silica 4 ug/m3 n/a

o OL = Overloading of particulates H MV = Microvac k: I ro S O o o I o

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NYC-WTC_000186152

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NYC-WTC_000186152Source: NYC Law Department, mirrored locally

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