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← Document results/DEP Box 48/380 RECTOR PLACE Block: 16 Lot: 7505 BIN: 1000544 Liberty Terrace
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Ambient air sampling report, 333 Rector Place, Sep 2001

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Laboratory report on ambient air samples collected in apartments and common areas of 333 Rector Place during September 24-26, 2001.

NYC-WTC_000120641–000120738

Folder label: “380 RECTOR PLACE Block: 16 Lot: 7505 BIN: 1000544 Liberty Terrace

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NYC 9/11 Public Portal Document

Page2 Milford Management 10/17/01

CLEANING PROCEDURES FOR VERTICAL HVAC AND EXHAUST DUCTING

Step 1. Perform a thorough visual inspection to determine the accessibility to the system. Vertical shafts often pose many challenges for cleaning procedures and remote inspection devices may be used.

Step 2. A remote vacuum/collector device will be attached to the duct to collect the contaminants once they become dislodged inside the ducts.

Step 3. The vacuum/collector is connected to the lower most portion of the shaft allowing the forces of gravity to help pull the debris into the vacuum system.

Step 4. Additional access to the vertical shaft will be gained on each floor of the building by inserting the cleaning tools into the duct and working the debris toward the shaft and then down to the point of vacuum hook up.

Step 5. At the time of the cleaning of a particular floor's duct work, it is imperative that the outlet and register openings of all other floors in the line be sealed off to prevent contamination from coming out of the system. Moreover, this helps in maintaining the negative air pressure within the system and improves the dust collection capability of our vacuum system. We will work with your staff in order to schedule accessibility to all units within a line in order that we service at least one line per day.

Step 6. Each grill or register is manually cleaned and degreased prior to reinstallation.

Any damage or conditions that affect the proper functioning of the system will Be reported to the building representative and management.

NYC-WTC 000120682

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NYC-WTC_000120682Source: NYC Law Department, mirrored locally

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