E-mails 2002 M. Gilsenan

NYC 9/11 Public Portal Document

Approach for Future HVAC Activities - Step 1

Consultants and EPA and NYCDEP meet on Monday, December 2 to discuss future program approach. Objectives of the meeting are to:

1. Further refine the evaluation checklist to result in a more thorough visual inspection of duct work, will include - Relating information from the scope to the checklist Eliminating bulk sampling from evaluation Reformatting checklist so it can better stand alone as a report 2. Discuss the relationship between the observation of dust and the recommendations for cleaning the system. (Does whole system need cleaning if dust is observed at intake?) Try to identify areas of agreement. 3. Discuss cleaning techniques, will include - Determining need for encapsulation Determining if NADCA cleaning requirements need supplementing to conduct cleaning related to WTC debris, and if so, how?

Approach for Future HVAC Activities - Step 2

Provide direct instruction to field staff and contractors on revised evaluation approach.

Approach for Future HVAC Activities - Step 3

Provide oversight of program through independent HVAC contractor to be obtained through competition by NYCDEP. Oversight components include:

A. 25% of all HVAC evaluations, and HVAC/exhaust system cleanings of buildings less than 10 floors will include on-site oversight by the independent contractor. B. In addition, 100% of all HVAC evaluations, and HVAC/exhaust system cleanings of buildings 10 floors or more will include on-site oversight by the independent contractor. C. The independent contractor will review the reports and sign that they have reviewed it and will indicate whether or not they have included comments (Before the report is sent to EPA, the MC will need to coordinate with the independent contractor to have the independent contractor review the report.)

Approach for Future HVAC Activities - Step 4

EPA reviews the HVAC evaluation reports and consults with DEP to determine the appropriate course of action. If it decided cleaning is needed, Krish will contact the quad cleaning contract to determine if cleaning can be done by unit cost pricing by existing cleaning contractor. If the cleaning contract caimot do cleaning, NYC determines another way to get cleaning done.

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