NYC-WTC_000220142

NYC 9/11 Public Portal Document FEB-06-2002 17=23 « 710 391 2385 718 391 2385 P.04/06

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Summary of Asbestos Sampling Results 70 Battery Place, New York, N.Y. 10280 Date sampled: November 1$, 2001

Four locations were sampled at your building; inside two private residences, an indoor common area (e,g„ a lobby or hallway), and a nearby outdoor area (see tables below for sampling results). One air sample was collected in each of the four locations, two dust samples were collected outside and one settled dust sample was collected at each of the indoor locations.

Air samples were collected using vacuum pumps to draw air past a filter that was suspended at - the height of a person’s breathing level. Outdoor dust and debris samples were collected by { I placing visible material in a container. Indoor dust and debris samples were collected on a filter^ . , by vacuuming surfaces. The collected mate^was weighed, viewed under a microscope, and/or U <IP"' chemically proc55sedYo determine the types and quantities of substances present. The materials were analyzed for fibers such as asbestos, fiberglass, synthetics (e.g. man-made materials such as nylon and polyester), cellulose (e.g. cotton, paper), silica, and for other minerals and small particles.

ASBESTOS AIR TEST RESULTS

Results of all of the air samples taken from your building were below the standard set for indoor air quality - 0.01 fibers per cubic centimeter (free) (see tables below). The highest level of fibers in the air at your building was 0.002 free. This air level is comparable to the air results from buildings located above 59* Street, which are not expected to have been impacted by WTC materials. In the homes above 59*^ Street, levels of fibers found in the air ranged from less than 0.001 free to 0.003 free. This indicates that the air levels for fibers from your building are similar to those seen in areas not impacted by the dust from the WTC collapse.

The air samples tested from directly outside and in the lobby ofyour building were taken during normal daily activity. The two air samples from the unoccupied apartments were taken after the dust in the apartment was aggressively “stirred up” to ensure that an accurate sample of particles would be present All air samples were examined in a laboratory for fibers using the Phase Contrast Microscopy (PCM) method.

Airborne fibers as determined by PCM analysts: An air sample is collected by pulling air through a filter. The filter catches fibers and is sent to a laboratory to detennine what types of fibers were in the air. Phase contrast microscopy identifies fibers based on size and shape, but not the specific type of fiber. Therefore, the fibers seen by PCM include asbestos fibers as well as other fibers, such as textiles, fiberglass, cellulose, wWeh might be present in your home. The PCM analysis assumes that ail fibers present were asbestos. Therefore, less hazardous fibers that may have been present, such as textiles or fiberglass, are counted along with the asbestos fibers, and the total

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NYC-WTC_000220142