WTC Cleaning Recommendation Memo, 45 Wall Street, January 2003

NYC 9/11 Public Portal Document

VENTILATION SYSTEM EVALUATION FORM Part 1 O f;annral infnrmatinn Date of Evaluation: 9-24-02.2 Report #2 I Building contact name and phone: Walter Gryzybonska/ (212)269-3003 Evaluation Team (list name and affiliation): Claude, Linton, Joy K. Kurin (Environmental Professional) Cole Consulting Inc. (HVAC/Electrical Professional) D.J.H.Mechanical Associates, Ltd. (Sheet Metal Professional) Building Address: 45 Wall Street Type of Facility (check all that apply): New York, NY 10005 ❑ Residential Multi-use ❑ Other (describe) 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 ❑ Other (describe) H. V. Location of outside air intake: William Street and Exchange place Outside air intake accessible for inspection: yes (explain)

2.0 General Description Of HVAC System

No. of Air Intakes: - Three (3) Location of Air Intakes: 1 small fresh air intake at exchange Place and two in William Street

Floor Served: - Sub cellar 2 (boiler room) Whether Intakes at Street Level:- yes No. of Rooftop Blower/Mushroom Vents: 15 Individual Heating / AC unit Present or not: - NA

General Description: - Two exhaust pumps in the basement, which serve 1st to 17th24th floor for kitchen and bathroom air out. Two Additional small exhaust pumps located on 18`h floor. They serve 18`h — floors for bathrooms and kitchens air out. In addition, 15 mushroom fans on rooftop to serve 25`h — 30`h 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.

2.2 Fan coil/ heat pump units in common spaces Ventilation System Identification: McQuay LHD114DH Serial # 37B00581-04 H.V.1 Location: Boiler Room Sub cellar Access adequate for inspection of components: Yes A I B C D Dust/Dirt/Debris E Suspect WTC-Related Dust System Component Color Light Heavy Present? Estimate % of total dust Substrate Material W- White (<1/16 inch (z 1/16 inch (YIN) loading (sheet metal wrapped) B - Brown depth) depth (sheet metal lined) G - Grey System Components (fiberglass) BG-Black gray (flexible connector) (double walled) Return air grille Sheet metal B& G z 1/16 inch YES 18%

Fresh Air Intake Grille Sheet Metal B, W, & G z 1/16 Inch Return air plenum Sheet metal White Dust <1/l6 inch YES 18% on To Filter rack Sheet Metal Lined G 2 1/16 inch YES 18% Filter media Fiberglass Disposable G z 1/16 inch 20x25x2 Blower assembly Sheet metal G < 1/16 inch

NYC-WTC 000133627