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Permit application Part II, air monitoring Jan 2006

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Part II of a permit application dated January 10, 2006 for air monitoring during remediation at 30 West Street.

NYC-WTC_000095766–000095780

Folder label: “30 West Broadway

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NYC 9/11 Public Portal Document

Regulatory Submittal Part II - Environmental Community Air Monitoring Program Fiterman Hat!— 30 West Broadway Airtek Project 05-0867 — January 10, 2006

Attachment A

Table 2- Data Reference Levels for Community Monitoring

Analyte Target Air Quality Levels EPA Site Specific Trigger See Note 1 Levels — See Note 2 Metals Antimony 5 uglm3 14 ug/m3 Barium 5 ug/m3 5 ug/m3 Beryllium 0.02u m3 0.2u m3 Cadmium 0.04 ug/m3 2 ug/m3 Chromium — See Note 3 0.6 ug/m3 60 ug/m3 Chromium VI 0.6 ug/m3 Copper 10 ug/m3 100 ug/m3 Lead 1.5 ug/m3 5 ug/m3 Manganese 0.5 ug/m3 0.5 ug/m3 Mercury 0.3 ug/m3 3 ug/m3 Nickel 0.2u m3 28 ug/m3 Zinc 16 u m3 160 ug/m3 Particles and Dusts Asbestos 0.0009 f/cc (PCMe fibers) 70 S/mm2 (TEM AHERA structures) Particulate PM-10 (24 hour 150 ug/m3 150 ug/m3 average) Particulate PM-2.5 (24 hour 40 ug/m3 65 ug/m3 average) Respirable Silica 10 ug/m3 10 ug/m3 (crystalline) Organics (semivolatiles) Dioxins/Furans (2,3,7,8 — 0.00025 ng/m3 0.025 ng/m3 TCDD equiv.) PCB (total Aroclors) 0.12 ug/m3 12 ug/m3

PAH (benzo-a-pyrene 0.034 ug/m3 3.4 ug/m3 equivalent) Note 1: A rolling average after the first week of sampling, except for PM-10 and PM-2.5. Note 2: A 24-hour value. Note 3: If a chromium value is in excess of the Target Air Quality Level (0.6 ug/m3), this will result in a stoppage of work; and, that sample will be speciated for chromium VI to determine that its concentration does not exceed the USEPA Site Specific Trigger Level for chromium VI, and the appropriate actions pertaining to an exceedance of the USEPA Site Specific Trigger Level will continue to be conducted.

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NYC-WTC_000095776Source: NYC Law Department, mirrored locally

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