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EPA review letter, 133-135 Greenwich Street

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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
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NYC 9/11 Public Portal Document

Project Monitoring:

Project Monitoring: Throughout the decontamination activities, project air monitoring will be conducted in addition to the Perimeter Monitoring described above. Project Monitoring will be conducted in s 'ct accordance with RCNY Title 15 Chapter 1, Section 1-41 to 1-45 e l sample analyses will be by TEM. ~~Q, ppp,oV~d vc&n( hc2 p~p (C Clearance Testing: Aggressive area clearance testing for asbestos will be conducted for all work ~I areas by TEM. Aggressive clearance testing for metals will be conducted by NIOSH 7300.

Clearance Criteria:

Clearance testing for asbestos will be acceptable when all samples for a given work area meet the 70 structures per square millimeter TEM standard, ' be

Antimon u P A ad o ►~ c\ 20. rain c e Bari 250 ug/m3 s?eCl •ecl Bery ium 1.0 ug/m3 sv-Noa\ %O-t- 9 e ( Cv rvv►.e~ aS Cadmi 5.0 ug/m3 ` .. f kL. )o k Q iRr1 - Chromium ( 250 ug/m3 Copper 00 ug/m3 Lead 5 ug/m3 Manganese 100 ug/m3 Mercury 12.5 ug/m3 Nickel 50 ug/m3 Zinc 1,000 ug/m3

Due to the impos i ' ty of removing structural framing without the risk of building collapse, all structural fraxpifIg will be wet-wiped, HEPA vacuumed, and encapsulated with penetrating encapsulant. As a part of the conventional demolition that will follow the decontamination, these materials wiltbe characterized for asbestos content and RCRA characteristics, and will be disposed of as Ipcpriate based on the test results.

Thank you for your and consideration,

Sincerely, Michael Porter Michael Porter Senior Project Manager

MP:mtf

NYC-WTC 000134223

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NYC-WTC_000134223Source: NYC Law Department, mirrored locally

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