69 MURRAY STREET Block: 132 Lot: 3 BIN: 1001420

NYC 9/11 Public Portal Document

2127554848 MI.CROECOLOGIES 077 P03 NOV 15 '01 12:57

Strojite nos. Smith-1 and.Smith-5 were taken from outdoor surfaces, the 9th floor terrace table and the 1061 floor metal deck, and indicated lead dust levels of 85.0 ug/82 and 110.0 ug/&, respectively. These levels are slightly higher than the clearance standards of 40.0 ug/ft. To be prudent, all surfaces on the terrace should be HEPA vacuumed, and floor surfaces wiped with Ledizolv and then re- { PA vacuumed. Table surfaces should be washed and rinsed. Then on a regular • basis (weekly), outdoor surfaces should be HEPA vacuumed to prevent significant deposits from accumulatiag that may be tracked into the interior of the residence. Sample no. Smith-4 was taken from the interior sir ikee of the unlined galvanized air supply duct in the TV room on the 10th floor which contains high levels of lobse particulates. This sample contains high levels of lead (16,000 ug/ft2). The rooftop air handler, the return duct, and the air supply ducts throughout the ptpmise should be cleaned as described below under HVAC.

VA (heating, ventilation, add -air conditioning) System

t1 pi vises are heated and.:cooled by a forced air system comprised of a rooftop air handler (package unit) and related return and supply ducts. The interior surfaces of air handler are insulated with fiberglass insulation which is severely damaged and 4eribrated. Significant levels of loose fiberglass were visible in the unlined gdvaraized air supply duct inspected in the 10th floor TV room. Such conditions are 11 1yto allow for the entrainment of invisible sized fiberglass particles into the air flow. ' The inhalation of fiberglass fibers is associated with chronic inflammatory rae*poeses at fiber deposition sites in the respiratory tract.

upstream side of the ;evaporator coil contains substantial levels of debris, especially on the east side which is difficult to access, that is visibly characteristic of and bacterial growth. 'To access the entire coil, the cutting and installation of a ovable access door may be required.

Fe4Bdwing is a outline of the hygienic maintenance work required in this unit:

!! HEPA vac m all into for ;surfaces of the unit. •carefully remove: alI:: deteriorated or damaged fiberglass insulation from accessible interior surfaces, observing environmental hygiene standards to prevent fiber and particle release. Encapsulate any deteriorated or damaged fiberglass insulation on non-accessible } surfaces with Fosters 40/20, a low toxicity, anti-fungal encapsulant paint. Clean and disinfect condensate pan and condensate overflow pan. aç check status of drain operation and unclog if necessary. !± llemove blower wheel :assemblies if accessible, clean and reinstall. Disinfect all interior surfaces of the unit and the air intake area using a low toxicity disinfectant, as: required.. ' Reiasulate all areas of fiberglass removal using Armaflex or Low-E insulation mixed with stick pins and low toxicity adhesive• micro Iok in: 141 east61st street, 2nd floor ♦ new york ny 10021 • tel: (212).755-3265 ♦ fax: (212) 755-4M8 web iti www.micrOecclogies,com • e-mail: micronn1ogiesjaol.com and Envirobmeatal Investigators • HVAC }lyy~ene ♦ Certified Hazard Abatement

NYC-WTC 000097846