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: 9-25-02 Report #4 Building contact name and phone: Walter Grz bonska/ (212) 269-3003 1" Floor Lobby Opposite Elevator Bank Evaluation Team (list name and affiliation): Claude Linton / Joy K. Kurin Environmental Professional: 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: NIC 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: LOBBY System Cleaned: No. Outside air intake accessible Yes x No (explain)

2.0 General Description Of HVAC System

No. Of Air Intakes: -0 (No Fresh air intakes) Location of Air Intakes: - Frequent door openings of lobby entrance at Wall street.

Floor Served: - N/A Whether Intakes at Street Level: -N/A No. Of Rooftop Blower/Mushroom Vents: 15 General Description: -N/A Individual Heating / AC unit Present or not: - YES

General Description: Two exhaust pumps in the basement, which serve 1st to 170' floor for kitchen and bathroom air out. Two additional small exhaust pumps located on 18th floor. They serve 18th — 24th floors for bathrooms and kitchens air out. In addition, 15 mushroom fans on rooftop to serve 25ti' — 30th floors for kitchens and bathrooms air out. Enclosed please find pictures taken of the passive shaft/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#LPH15DMO5 Serial No. 76M0699-07 Location: 1st Floor Lobby Opposite Elevator Bank Access adequate for inspection of components: Yes A B C D Suspect WTC-Related Dust Dust/Dirt/Debris System Component Color Light Heavy Present Estimate % of total Substrate Material W- White (< 1/16 (>_ 1/16 inch depth ? (Y/N) dust loading (sheet metal wrapped) B - Brown inch depth) G - Grey System Components (sheet metal lined) B - Black (fiberglass) (flexible connector) (double walled)

NYC-WTC 000133587