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Law Department notice on WTC document preservation, Oct 2001

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Notice from NYC Law Department instructing staff to preserve World Trade Center documents for potential legal actions.

NYC-WTC_000145345–000145509

Folder label: “NO INFO

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NYC 9/11 Public Portal Document

TEM Results (70 s/mm2) Location Sampling Period No. of No. or No. above Samples 290 Broadway 09/13/01 -09/28/01 18 0 58 0 10/09/01- 10/23/01 16 0 16 0 12/03/01 - 01/02/02 21 0 21 0 1 Bowling Green 10/12/01-10/25/01 18 0 16 0 Note: All results were non detect except for 4 of the 58 samples collected between 9/13/01 and 9/28/01. Two of these sample showed asbestos levels of 25 s/mm2 by TEM and 2 samples could not be analyzed because of overloaded filters.

K-6: Asbestos Dust Testing at 290 Broadway Sample Collection tnformation No. of Samples Os Asbestos Detected Asbestos Detected Net 09/14/01 Vacuum 5 Not Analyzed 5 09/14/01 Tape 5 0 0 09/14/01 HVAC Filter 3 0 0

290 Broadway SOO r»earl Street ■ gj Screening NO. Of No. Above No. Of No. Above sg Test Method Screwing Samples

Lead 50 ug/m3 NIOSH 7082 3 0 6 0 Respirable Dust 5.0 mg/m3 NIOSH 0600 3 0 6 0 Carbon Dioxide 5000 ppm Telaire CO2 3 0 6 0 Carbon Monoxide 50 ppm SGA91 3 0 6 0 VOCs 1 ppm [1] H-Nu Photo 3 0 6 0 [1] a Method Detection Limit

Other Indoor Air Studies

“Characterization of Particulate Found in Apartments After Destruction of the World Trade Center.’’^® This study was conducted at the request of the Ground Zero Elected Officials Task Force. This study selected two residential apartment buildings for sampling - one presumed to have significant WTC dust contamination and the other not - based on their locations. Six air samples were collected from inside one apartment building and five from the other. All 11 samples were analyzed by the TEM method. The study found higher levels of

18 Eric J. Chatfield, Ph.D., Chatfield Technical Consulting Limited, and John R. Kominsky, M.Sc.,CIH, CSP, CHMM, Environmental Quality Management, Inc.; October 12,2001. 97 Report No. 2003-P-00012

NYC-WTC_000145452

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NYC-WTC_000145452Source: NYC Law Department, mirrored locally

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