E-mails M. Gilsenan 2002

NYC 9/11 Public Portal Document e. f. g h. spaces greater than 160 square feet and less than 25,000 square feet 5 air samples will be collected. For spaces greater than 25,000 square feet, 1 air sample will be collected for each 5,000 square feet. Sampling equipment shall be placed away from obstructions. The sampling cassette must be placed on a tripod direeted downward ata 45 degree angle and not taped to existing surtaces. Air samples shall be collected in accordance with the procedures specified in NIOSH 7400 Method for PCM and 7402 for TEM. Air sampling cassettes need to be monitored to ensure pumps are not clogging by monitoring flow rates. The minimum sample volume required is 3600 liters. Wipe samples will be collected at 10 percent of the residences where sampling only has been requested, up to a maximum of 50 units Units should be defined, as instructed by EPA. What are the criteria for selection? This sampling will consist of the collection of one wipe sample each for dioxin, total metals and mereury (a separate wipe sample is required for each parameter). Metals and mereury 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. What are the criteria for where in the residence the wipe sample is collected? The methods and analytes should also be listed in the second page as noted previously: The contractor shall document all the necessary information regarding sampling activities, fill out all field logs, data sheets, and chain-of-custody forms. The contractor shall use F2L for all sample and chain-of-custody documentation. Samples must be labeled and accompanied with compléted 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 to EPA Contract Laboratory for analysis. All information must be maintained using the secure EPA website (url, user name and password to be provided by EPA). Dates for monitoring and/or cleaning shall be provided to EPA electronically in an EPA approved format within 24 hours. Information on sampling activities (date, sample ID) shall be provided to EPA, via the websité, within 24 hours of' completion of sampling. Deliverables The Project Monitor shall review all deliverables priorto submissionto EPA. Thereview shall assüre that each deliverable is accurate and complete, technically sound, and free of clerical errors. The Project Monitor shall record equipment used to collect the sample fleafbłower, fan, ete.) and size of space daily in the field notebook. In addition, date, start and completion dates for the cleaning, sample media, flow media type, flow rates (start/final), flow rate (average); time (start/finish), total elapsed time (min), calculated sample volume (L), pump fault, weather, units, QC "samples (lot blank) sampling dates and sample identification numbers (sample IDs), complete chain- of-custody forms, EPA Project Tracking Numbers and laboratory address shall be entered into an agreed upon electronic format or website approved by EPA within 24 hours of activity. NYC-WTC_000164036