Indoor dust cleaning program Scope of Work, August 2002

NYC 9/11 Public Portal Document

a. The Project Monitor will collect pre-cleanup and post-cleanup wipe samples at 5 percent of the residences cleaned up to a maximum of 50 residences as instructed by EPA. This sampling will consist of the collection of 3 pre cleaning and 3 post cleaning wipe samples for dioxin, total metals and mercury (Note: a separate wipe sample is required for each parameter). Metals and mercury wipe samples will be collected in accordance with procedures specified in HUD Appendix 13.1. Dioxin wipe samples will be collected in accordance with the procedures specified in ASTMD 6661-01.

b. The Monitoring Contractor will document all the necessary information regarding sampling activities, fill out all field logs, data sheets, and chain-of-custody forms. The Monitoring Contractor shall use F2L for all sample and chain-of-custody documentation. Samples must be labeled and accompanied with completed chain-of- custody forms before shipping to the designated laboratory. The label must include the EPA Project Tracking Number. Samples will be packed, sealed and shipped daily by courier for next day delivery to Paradigm Analytical Laboratories at: 2627 Northchase Parkway SE, Wilmington NC 28405

c. Personnel collecting wipe samples shall be familiar with and experienced in the collection of wipe samples using the specified sampling method.

Deliverables

The Project Monitor will keep a field notebook and document sampling locations (including a field sketch). The Project Monitor shall complete chain-of-custody forms and record the number of wipe samples, EPA Project Tracking Numbers, the laboratory address, date, and sample IDs in an agreed upon electronic format or website approved by EPA within 24 hours of activity.

5. The Project Monitor shall schedule and oversee the cleaning operations of the Cleaning Contractor. Prior to initiating the cleaning ofany residence, common space or HVAC system the Monitoring Contractor shall verify that the exterior of the building has been cleaned or has been inspected and found to be free of debris from the collapse ofthe WTC or shall obtain written authorization from EPA to proceed. No residential or common space shall be cleaned until the HVAC system has been evaluated and cleaned as necessary. If a scheduling problem arises, the Project Monitor should contact EPA. The Project Monitor shall coordinate daily access for cleaning and sampling with residents, owners, the Cleaning Contractor and sampling technicians.

iO. The Monitoring Contractor shall provide sufficient personnel to provide periodic (3- 4hours/unit) oversight of the Cleaning Contractor to verify that work is being conducted in accordance with the Cleaning Contract Scope of Work.

9

NYC-WTC_000139038