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NYC-WTC_000232249
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NYC 9/11 Public Portal Document
8.0 ACTION LEVELS AND MITIGATION MEASURES A two tiered system will be in place during the entire term of the deconstruction project. This system includes use of both Target Air Quality Levels and USEPA Site Specific Trigger Levels for each of the target parameters identified previously in Section 4. A summary listing of these Action Levels provided on a parameter specific basis is shown in Table 5.
Table 5. Target Air Quality Levels and USEPA Site Trigger Levels^* USEPA Site Specific Analyte Target Air Quality Levels Trigger Levels Metals Antimony 5 ug/m^ 14 Ug/m' Barium 5 ug/m 5 ug/m' Beryllium 0.02 ug/m^ 0.2 ug/m' Cadmium 0.04 ug/m^ 2 ug/m' Chromium 0.6 ug/m' 60 ug/m' Copper 10 ug/m^ 100 ug/m' Lead 1.5 ug/m' 5 ug/m' Manganese 0.5 ug/m' 0.5 ug/m' Mercury 0.3 ug/m' 3 ug/m' Nickel 0.2 ug/m' 28 ug/m' Zinc 16 ug/m' 160 ug/m' Particles and Dust Asbestos 0.0009 f/cc (PCMe fibers) 70 S/mm' (TEM AHERA structures) Particulate PM^q (24 hour average) 150 ug/m' _______ 150 ng/m'______ Respirable Silica (crystalline) 10 ug/m^ lOug/m^ Organics (semi-volatiles) Dioxins/Furans (2,3,7,8 - TCDD equiv.) 0.00025 ng/m 0.025 ng/m^ PCB (total Aroclors)_________________ 0.12 ug/m^ 12ug/m^ PAH (benzo-a-pyrene equivalent) 0.034 ug/nr 3.4ug/n? '‘All values listed in Table 5 are consistent with Target Air Quality Levels and USEPA Site Trigger Levels adopted for use during 4 Albany Street deconstruction project. As such these levels represent USEPA/NYDEC sanctioned values.
8.1 Action Levels
The following actions will be taken if there is an exceedance of any Target Air Quality Level. If there is an exceedance of both the Target Air Quality Level and USEPA Site Specific Trigger Level, actions associated with the USEPA Site Specific Trigger Level will govern.
8.1.1 Target Air Quality Levels
Any 24-hour PMio value in excess of the Target Air Quality Level will be considered an “exceedance” and the actions described below will be taken.
L2005-149 (051205) 1 5023623.2
C ITY_D E P_W0 RB Y_C AN N ATA_SU B P_000114901
NYC-WTC_000232270
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NYC-WTC_000232270Source: NYC Law Department, mirrored locally
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