EPA sends sampling recommendations and attached documents for 125 Cedar Street.
NYC-WTC_000163312–000163313Folder label: “E-mails M. Gilsenan”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Recommended Sampling Protocols for 125 Cedar Street
I) 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 7471A.
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 f/cc), 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_000163313
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NYC-WTC_000163326
Forwarding EPA sampling recommendations for incorporation into scope of work for 125 Cedar and 114 Liberty buildings.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163360
Technical specifications for air quality monitoring work at two Manhattan buildings.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163372
Request to send the air monitoring scope document to legal counsel and the sender due to computer access issues.
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machine-extracted · confidence unavailable · Check page ↗9 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000156044
Summary document outlining key dates from June to September 2002 regarding inspections, scope development, and contract bidding.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000155997
EPA technical recommendations and protocol for environmental sampling activities at 125 Cedar.
9 shared non-person entities · similarity 0.975
machine-extracted · confidence unavailable · Check page ↗9 shared non-person entities · similarity 0.967
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000156019
Document tracking the chain of custody for environmental samples collected at 125 Cedar Street on August 21, 2002.
9 shared non-person entities · similarity 0.945
machine-extracted · confidence unavailable · Check page ↗9 shared non-person entities · similarity 0.944
machine-extracted · confidence unavailable · Check page ↗9 shared non-person entities · similarity 0.943
machine-extracted · confidence unavailable · Check page ↗9 shared non-person entities · similarity 0.943
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Notice for mandatory pre-bid meeting regarding asbestos abatement scope of work at 125 Cedar Street (110 Liberty Street).
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NYC-WTC_000107433
EPA-DEP coordination regarding cleaning of windows and fire escapes affected by dust from nearby construction and WTC debris removal activities.
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Cited alongside this record in an Ask answer
NYC-WTC_000139196
Correspondence regarding dust accumulation from adjacent facade repointing work in shared airshaft, with commitment to reclean windows and fire escapes.
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Cited alongside this record in an Ask answer