NYC-WTC_000231976

NYC 9/11 Public Portal Document

Section 2 - Ambient Air Monitoring Program Revision No.: 0 130 Liberty Street Deconstruction Plan Date: September 7, 2005 Lower Manhattan Development Corporation

2.3 Locations of Monitoring Stations

The list of proposed monitoring locations is provided in Table 1. These include four (4) stations situated at ground or street level, four (4) stations situated at elevated locations atop buildings in the vicinity of the 130 Liberty Street property, and four (4) stations on each side of the scaffolding. This initial location of the four “floating” monitoring stations will be on the roof to monitor the rooftop work prior to their re-location to subsequent floors. These “floating” monitoring stations will then be re-located from the roof to the 10*** floor scaffold. Subsequently, as scaffold erection proceeds upward, the “floating” monitors will be relocated in ten floor increments (e.g. to floor 20 and then floor 30). Then, these four “floating” monitoring stations will be re-located downward on the scaffolding in ten floor increments (e.g. floors 30, 20 and 10) as the deconstruction work progresses from the roof level to ground level. In effect, these “floating” monitors are intended to monitor abatement and deconstruction work occurring above them. The approximate locations of each of these stations in relation to the 130 Liberty Street Site are shown in the site schematic provided as Figure 1. LMDC is committed to working with the EPA to site actual locations in the field. Figure 1 also includes a composite wind rose representative of the New York Metropolitan area noting predominant wind directions likely to be characteristic of the project work zone during the term of the deconstruction project. These wind directional data were taken into consideration in the actual placement of monitoring stations around the 130 Liberty Street Site.

Table 1. Locations of Monitoring Stations - 130 Liberty St. Deconstruction Air Monitoring Network Location # Description 1 Southwest of building (Washington St./Albany St.) at ground level. 2 Southeast of building (Albany St./Greenwich St.) at ground level. 3 North-northeast of building (Liberty St/Greenwich St) at ground level. 4 Northwest of building (Washington St./Cedar St.) at ground level. 5 Off-site roof top location (124 Liberty Street - FDNY 10-10 House). 6 Off-site roof top location (90 Trinity Place - School). 7 Off-site roof top location (85 West Street - Marriott Hotel). 8 Off-site roof top location (110 Greenwich Street) 9-12 Each side at elevation on scaffolding (Phase I and II only).

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CITY_DEP_WORBY_CANNATA_SUBP_000057075

NYC-WTC_000231985