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

6.3 Phase I - Asbestos and COPC Abatement Phase

During Phase I (abatement phase) air monitoring will take place at twelve (12) stations each day (Table 1 Locations 1-12). During the first three (3) days only of Phase I Abatement work, samples will be collected and analyzed for semivolatile organics to include PCDDs/PCDFs, PAHs and PCBs. After this first three (3) day period, sampling for semivolatile organics will be reduced to a once per week frequency employing the entire station network. One day per week on a rotating basis (week #1 Monday, week #2 Tuesday, etc.) samples will be collected at every station in the network. The schedule will be repeated until project completion.

The semivolatile organic samples collected employing this weekly sampling frequency will not be processed for analyses; rather they will be placed in archival storage at the laboratory. A single set of samples will be selected from each weekly sampling event to undergo analyses for PCDDs/PCDFs, PAHs and PCBs. The station with the highest 24-hour average PMio concentration (ug/m3) recorded with a collocated organic sample each week will be selected for semivolatile organic analyses.

A summary of sampling frequencies on a target parameter specific basis applicable to Phase I of the deconstruction program is provided in Table 4.

Table 4. Phase I: Preparation Phase & Asbestos and COPC Abatement and Removal Sampling and Analysis Summary Location Parameter(s) Sample Frequency Analysis Method Site Area Mercury (vapor/gas) Each Day Lumex, portable mercury analyzer Site Area Visible dust emissions Each Day Visual observation Ground/Street 1. Asbestos Each Day (asbestos and 1. TEM/SEM Level 2. Silica silica are sampled during 2. XRD (4 Locations) work shift) 3. Metals Each Day (24 hr. Basis) 3. ICP/MS 4. PCDDs/PCDFs 4. HRGC/HRMS 5. PAHs 5. GC/MS 6. PCBs 6. GC/ECD 7. Mercury (total) 7. lodatedCarbon Trap/CVAFS 8. PMio Continuously “Real-Time” 8. EBAM/Gravimetric 9. PM2.5 Each Day (PMio and PM2.5 9. ER AM/Gravimetric on 24 hour basis at each location; PMio and PNL s reference sampler at 1 location per day on 24- hour basis with location changed monthly)

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NYC-WTC_000231997