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, Report# 1 Building contact name and phone: Walter Grz bonska/ (212) 269-3003 17th 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 ❑ 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) El Unit ventilator (single residence unit) El Wall/window AC unit (single residence unit) El Fan coil unit (single residence unit) El Central ventilation system ® Heat pump unit (single residence unit) El 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: 17`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

General Description: - Two exhaust pumps in the basement, which serve 1s` to 17"' floor for kitchen and bathroom air out. Two Additional small exhaust pumps located on 18°' floor. They serve 18"' — 24"' floors for bathrooms and kitchens air out. In addition, 15 mushroom fans on rooftop to serve 25"' — 30"' floors for kitchens and bathrooms air out. Enclosed 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. 7780456103 Location: 17`h 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 G -Grey depth 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 -------

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

NYC-WTC 000133623