WTC Cleaning Recommendation Memo, 45 Wall Street, January 2003

NYC 9/11 Public Portal Document

VENTILATION SYSTEM EVALUATION FORM Part 1.0 General Information Date of Evaluation: 10/04/02, Re ort#2 Building contact name and phone: Walter Gr bonska/ (212) 269-3003 18` Floor. Evaluation Team (list name and affiliation): Claude Linton / Joy K. Kurin Environmental Professional: Cole Consultants HVAC Contractor: DJH MECHANICAL ASSOCIATES LTD. Sheet Metal Professional: Building Address: 45 Wall Street, New Type of Facility (check all that apply): York, NY 10005 Residential Building Age: 45 Years Multi-use Distance from Ground Zero: Half Mile E Other (describe) Direction from Ground Zero: South East Number of residential units: N/A Number of floors: 29 +2(B) HVAC System Types (check all that apply) Unit ventilator (single residence unit) Wall/window AC unit (single residence unit) ❑ Fan coil unit (single residence unit) Central ventilation system Heat pump unit (single residence unit) Passive shaft/duct This pump supplying heat and cool to the room HVAC Shut Down: System Didn't Shutdown Frequency of filter change-outs: Every Two months in Commercial Place Impacted by WTC dust: No Location: 18`h Floor hallway System Cleaned: No. Outside air intake accessible for inspection Yes x No (explain): No fresh air intake

2.0 General Description Of HVAC System

No. of Air Intakes: - 0 (No Fresh intakes) Location of Air Intakes:- N/A

Floor Served: - N/A Whether Intakes at Street Level:- N/A No. of Rooftop Blower/Mushroom Vents: 15 Individual Heating / AC unit Present or not: - YES 1s1 General Description: - Two exhaust pumps in the basement, which serve to 17th floor for kitchen and bathroom air out. Two Additional small exhaust pumps located on 18th floor. They serve 18`h — 24th floors for bathrooms and kitchens air 25th — 30th floors for kitchens and bathrooms air out. Enclosed out. In addition, 15 mushroom fans on rooftop to serve please find pictures taken of the passive shaft/duct duct shaft and mushroom fans, which showed no signs of WTC dust debris.

3.0 Fan coil/ heat pump units in common spaces

Ventilation System Identification: Make: McQuay M#FCV036BMGR Serial No. 7780457803 Location: 18th floor hallway Access adequate for inspection of components: Yes A B C D E Dust/Dirt/Debris Suspect WTC-Related Dust System Component Color Heavy Present? Estimate % of total dust Substrate Material W- White (>_ 1/16 inch (YIN) loading (sheet metal wrapped) B - Brown Light depth G Grey System Components (sheet metal lined) (< 1/16 inch B - Black (fiberglass) depth) (flexible connector) (double walled) Return air grille Sheet metal B& G < 1/16 inch --- No -------

Nil Nil Nil No Nil Fresh Air Intake Grille Nil Return air plenum Nil Nil Nil Nil No Nil

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