2002 E-Mail Sent M. Gilsenan

NYC 9/11 Public Portal Document

taped to existing surfaces. g- Common spaces will be sampled without the use of forced air devices (fans, leaf blowers etc). For small spaces, less than 160 square feet, 3 samples will be collected. For large spaces greater than 160 square feet and less than 25,000 square feet 5 samples will be collected. For spaces greater than 25,000 square feet, 1 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 directgd^ downward at a 45 degree angle and not taped to existing surfaces. h. Air samples shall be collected in accordance with the procedures specified in NIOSH Method 7400 for PCM and 7402 for TEM. Air sampling pumps need to be monitored to ensure pumps are not clogging by monitoring flow rates, the minimum sampling volume required is 3600 liters. 1. 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-cusfody de jumentation. Samples must be labeled and accompanied with completed chain ofcust dy forms before shipping to the designated laboratory. The label must include the E Project Tracking Number. Samples will be packed, sealed and fprs aalysis to E SLl^oratories at; 307 W. 38* St., New York, New York 212-290- l; j- All information must be mainlained i EP^'^ebsite(url, user name and password to be provided by EPA). Dates 1 mitoring and/or cleaning shall be provided to EPA and DER^ctronic ^ina ^proved format within 24 hours. Information on sampling aiCtivitieS;^late, sample ID) will be provided to EPA, via the website, within 24 h^s of complctiion of equation.

sliverables & TWO onitor shall review all deliverables prior to submission to EPA. The review shall assure i^ deliverable is accurate and complete, technically sound, and free of clerical errors. b. HF ThePwiectMomoi tall record all post-cleaning information in the EPA Indoor Air database or an agreed upon electronic format. This information shall include but, not limited to sampling Jpchnique (aggressive or modified aggressive), visually cleaned (Y/N), damage claim (Y/N), and ,^'post clean-up status (pass/fail). Dates and times shall be associated with all activities including start and finish date.

Additional information shall be recorded include not limited to absence of dust/debris, equipment used (leaf blower, fan etc.), size of space, start and completion dates for the cieaning, sample media, flow media type, flow rates (start/flnal, flow rate (average). Time (start/flnish). Total elapsed time (min). Calculated sample volume (L), Pump fault, weather, units, QC samples (lot blank) sampling dates, sample IDs, complete chain of custody, 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. Dates and times shall be associated with all activities including start and finish date.

NYC-WTC_000139498