US EPA Region 2 letter dated November 15, 2005, confirming completion of environmental review for abatement plans at 133-135 Greenwich Street.
NYC-WTC_000134132–000134414
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Part II- Environmental Community Monitoring Plan 133-135 Greenwich & 21-23 Thames Streets Airtek Project 05-0701— Rev 2 September 16, 2005
Footnote 1: Sampling duration and/or flow rates may be modified to provide optimum analyte loading for analysis based on results of ongoing analyses. Initial Sampling flow rates should be in accordance with rates prescribed in the sampling method.
Footnote 2: Organics will be sampled as provided below under "Notes on the Community Air Monitoring Table."
Notes on Community Air Monitoring Table:
General: Blanks will be processed in accordance with the analytical methodologies and standard industry practice.
Asbestos:
Asbestos sample collection will be performed in accordance with NIOSH 7402, "Asbestos by TEM". Asbestos analysis will be performed utilizing Transmission Electron Microscopy ("TEM") analysis specified in 40 CFR Part 763, Asbestos Hazard Emergency Response Act, ("AHERA"), with the following modifications:
1. The sensitivity on TEM air samples will be less than 0.002 s/cc. 2. Both the length and width of all asbestos fibers will be recorded. 3. Confirmation by EDS and/or SAED will be performed for each fiber analyzed. 4. The mineralogy of the fibers will be noted and recorded.
Dust:
Airborne dust and particles at the Site will be monitored using real-time air monitoring instrumentation. Real-time air monitoring for PM-2.5 and PM-10 will be accomplished with direct reading particulate in air monitors. Data from Met One E-BAM Particle Counters are to be data logged. At one location the Met One E-BAM Particle Counter data will be compared against PM-2.5 results from PM-2.5 direct read results obtained using a Met One BAM 1020 monitor. At another location, the Met One E-BAM Particle Counter data will be compared against PM-10 results from PM-10 direct read results obtained using a Met One BAM 1020 monitor. This equipment will be operated for at least one week before the Abatement Phase begins. Prior to the commencement of the Abatement Phase, the EPA Region 2 office will be provided with the results comparing the data from the Met One E-BAM with the alternative instrument and the proposal of a correction factor, if needed.
Respirable Dust/Crystalline Silica — Metals — Total Dust:
Respirable dust and crystalline silica sampling will be performed according to NIOSH Method 0600 protocol with analysis following NIOSH Method 7500 (XRD).
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NYC-WTC 000134239
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