Air monitoring plan Part III, 30 Warren Street, January 2006

NYC 9/11 Public Portal Document

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

Initial Community Air Monitoring locations are identified on the drawing included in Attachment A (Community Monitoring) to this specification. If the environmental air monitoring locations need to be changed during the Deconstruction phase due to site conditions, NYS DOL and USEPA Region 2 office will be notified promptly. The community air monitoring locations will not be moved until NYS DOL and the USEPA Region 2 office accept the change.

5.0 Interpretation of Sample Data The Target Air Quality Levels and EPA Site Specific Trigger Levels for the Site are set forth in Attachment A, Table 2.

The following actions will be taken if there is an exceedance of Target Air Quality Level. If there is an exceedance of both the Target Air Quality Level and the EPA Site Specific Trigger Level, actions under the EPA Site Specific Trigger Level heading below will govern.

5.1 Target Air Quality Levels

Any 24-hour PM2.s and PMio value in excess of the Target Air Quality Level will be considered an "exceedance" and the actions described below will be taken.

During the first week of sampling any sample of an analyte other than PM2.5 and PMto in excess of 3 times the Target Air Quality Level for that analyte, unless superceded by an EPA Site-Specific Trigger Level, will be considered an exceedance and the actions described below will be taken.

Following the first week of sampling, a "rolling average" will be established based initially on the first week's results, to which will be added daily values as results are received from the laboratory. A rolling average value for any analyte, other than PM2.5 and PMio, in excess of the relevant Target Air Quality Level will be considered an exceedance of Target Air Quality Level and the actions described below will be taken.

Exceedance of an established Target Air Quality Level for any analyte calculated as provided above will result in an evaluation of engineering controls and work techniques in the source area. This evaluation shall include but not be limited to the evaluation of work activities that may be causing the exceedance, smoke testing of the isolation barriers in question, and inspection and repair of any faulty isolation barriers.

5.2 EPA Site Specific Trigger Levels

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NYC-WTC 000096681