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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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CONTAMINANT OF POTENTIAL CONCERN (COPC) EXCEEDANCE BY EVENT TABLE [ADD] - UNIT 2B, TEST 3A

Cleanup Criteria Pre-Cleaning Post- First Cleaning Post - Second Cleaning COPC Air Wipe MV Air [Wipe MV MV Air Wipe MV Dioxin 0.001 ng/m3 4 ng/m2 PAH 0.2 ug/m3 300 ug/m2 Asbestos 0.0009 f/cc n/a

Lead 1 ug/m3 25 ug/ft2 25 ug/ft2 97

MMVF 0.01 f/cc n/a Silica 4 ug/m3 n/a

UD = Uneven distribution of material OL = Overloading of particulates MV = Microvac o H

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NYC-WTC_000186139

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NYC-WTC_000186139Source: NYC Law Department, mirrored locally

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