2001 M. Gilsenan

NYC 9/11 Public Portal Document

IX. Sample Description Needs;

In order to interpret results, the following information should accompany each area sampled:

1. Reason for selection of site for sampling (e.g., apartment had windows open or broken during the WTC event; visible dust present in ambient air adjacent to apartment building)

2. Description of sample location Physical address Apartment/floor number Side of building (N, S, E, W) Main entryway

Sketch of area showing sample location

3. NYDEP check list/building inspection report

4. For indoor sample locations, provide the following: Has area been cleaned since WTC event? Date(s) of cleaning If so, description of cleaning wet mopping dusting sweeping (Broom, vacuum, HEPA vacuum) carpets washed Who conducted the cleaning Is visible dust present? If so, describe

During sampling, if resident(s) are present, describe activities during sampling (e.g. cooking with/without exhaust fan, using fireplace, smoking, cleaning/vacuuming)

Residents should be advised not to bum candles, incense, etc., during air sampling

5. For entryway sampling locations (e.g., lobbies) Is there evidence of dust track-in fi-om outdoors Same questions as #4

6. For outdoor sampling, provide the following: Location of samples relative to main entryways of residential buildings Side of building (N, S, E,W) Location of samples relative to roadways Location of samples relative to dust-generating activities (e.g,. construction) Is visible dust present (air, surfaces) If so, describe

7. Description of HVAC system

Page 9 of 10

NYC-WTC_000164426