Ambient dust sampling protocol for residential areas, Oct 2001

NYC 9/11 Public Portal Document

****DRAFT Version 10, October 29, 2001****

IX. Community Notification of Results:

The analytical results along with a public health interpretation will be provided to the community in several different ways. Each participant who allowed sampling in their home will be provided with their individual results. Each building owner/operator will be given results of all sampling conducting in the building. Results (without personal identifiers) will also be provided to all occ ipants of the building. Finally, all results (without personal identifiers) will be provided to residents in lower Manhattan.

In each instance, notification will include a summary of the results; a comparison of the results of samples collected in lower Manhattan with the results of samples collected as NYC background; a public health interpretation of the results; and recommendations (if needed) that would reduce exposures.

These notifications will be prepared after all of the analytical data has been received. It is anticipated that notification will occur within 4-6 weeks after sampling is begun. However, data and its QA/QC will be reviewed as it is provided by the laboratory. If, results are found that indicate a more immediate notification is necessary (e.g., levels are found that pose a public health hazard), the participants who may be impacted will be notified as soon as possible. Based on the circumstances, this notification may include just residents in an individual unit, or it may include all residents in the building along with the building owner/operator. If such a notification is necessary, all involved public health agencies will take steps to ensure that it includes specific recommendations/actions that can be quickly implemented to reduce exposures below levels that pose a health hazard.

X. Screening Values/Data Interpretation/Recommended Actions:

Screening levels and actions are outlined in Section XI of this proposal.

Data will be evaluated by local, state and federal public health agencies. Evaluations will include: 1) Indoor sample results will be compared to background and evaluated on a residence- by- residence basis (for the individual occupants) 2) All indoor data will be compared to background and evaluated to determine any public health implications for residents near the WTC 3) All outdoor data will be compared to background and evaluated to determine any public health implications for the general public living near the WTC 4) The relationship between materials found in indoor and outdoor samples will be evaluated.

For 1 through 3, above,

Sample results will first be compared to the results fi-om bac’'^iuLuid locations. If results are less than or within those found in background locations, then the health interpretation will stress that there is no indication that the resident(s) in the area tested are at any increased risk compared to those in communities further away fi-om the WTC.

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