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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_000145510–000145686

Folder label: “NO INFO

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NYC 9/11 Public Portal Document

• A lack of data results for many pollutants, An absence of health benchmarks for asbestos and other pollutants. Imprecise optical asbestos sampling methodologies, and Over 25 percent of the bulk dust samples collected before September 18 showed the presence of asbestos above the 1 percent benchmark.

EPA did not have monitoring data to support reassurances made in press releases up to September 18 because it lacked monitoring data for several contaminants, particularly PCBs, particulate matter, dioxin, and PAHs.

According to a draft evaluation entitled Exposure and Human Health Evaluation ofAirborne Pollution from the World Tra^ Center Disaster, by EPA’s Office of Research and Development, that Office was not able to make health risk evaluations for exposures in the first couple of days because of the lack of monitoring data. For several pollutants of concern, sampling did not begin until September 16, and in many cases the results were not known until after the September 18 press release was issued. EPA was not able to obtain samples and monitor air due to difficulties in access and security, power supply sources, equipment availability, and analytical capacity. As a result, data available before September 18 for making conclusions about air quality for pollutants other than asbestos was limited.

Table 2-2 shows when air monitoring began and when the data results first became available for each pollutant of concern.

10 Report No. 2003-P-00012

NYC-WTC_000145530

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NYC-WTC_000145530Source: NYC Law Department, mirrored locally

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