9 shared non-person entities · similarity 0.976
machine-extracted · confidence unavailable · Check page ↗Document / 3 pages
EPA sampling protocol for 125 Cedar, August 2002
Machine-extracted title · confidence 85%EPA technical recommendations and protocol for environmental sampling activities at 125 Cedar.
NYC-WTC_000155997–000155999Folder label: “125 CEDAR 1 OF 2”
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NYC 9/11 Public Portal Document
A
Recommended Sampling Protocols for 125 Cedar Street
1) Sample for WTC COPCs (lead, PAHs, dioxin, asbestos, fibrous glass, and crystalline silica) and mercury in following procedures established in the WTC Indoor Air Pre-Cleanup Pilot Study.
2) Air samples should be collected for asbestos, fibrous glass and silica. Settled dust (wipe samples) should be collected before and after cleaning for lead, mercury, dioxin and PAHs. Aggressive air sampling techniques specified in the Monitoring Contractor SOW should be used. 3) Sampling and analytical methods for lead, PAHs, dioxin, asbestos, fibrous glass, and crystalline silica are specified in the WTC Indoor Air/Environments Monitoring - Sampling and Analytical Procedures for Background and Pilot Cleanup Studies. Mercury wipe samples should be collected in accordance with procedures specified in HUD Appendix 13.1. Mercury wipes should be analyzed in accordance with EPA Method SW-846 7471 A.
4) Sampling frequency is specified in the Pre-Cleanup and Post Cleanup Pilot Study Sampling Matrices. Mercury wipes should be collected at the same frequency and locations specified for lead wipes.
5) Tier III benchmarks specified in Indoor Air Assessment: Selecting Contaminants of Potential Concern and Setting Health Based Benchmarks for asbestos in air (0.0009 f/cc PCMe), lead in settled dust (<25 ug/ft2) and dioxin in settled dust (<4ng/m2) should be used as primary clearance levels for the cleanup (i.e. cleaning should not be considered complete unless these levels are achieved).
6) Tier III benchmarks specified in Indoor Air Assessment: Selecting Contaminants of Potential Concern and Setting Health Based Benchmarks for fibrous glass in air (<0.01 free), crystalline silica in air (0.5 ug/m3), PAHs in settled dust (<0.3mg/m2) should be used as secondary clearance levels for the cleanup. In addition, EPA has developed a secondary clearance level for mercury of of between 1 and 2 mg/m2. Secondary clearance levels should be considered in determining the need for additional cleanup, however failure to meet these levels would not automatically trigger recleaning.
NYC-WTC_000155998
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NYC-WTC_000155998Source: NYC Law Department, mirrored locally
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