Fiberglass and mineral air sampling results, Building 1, Oct 2001

NYC 9/11 Public Portal Document

DRAFT glass. No visibly settled dust was available to collect in comparison building outdoor locations.

Please refer to the previous part of this report (flyer) for the limitations of this data, the possible symptoms of exposure, and recommendations on how to reduce you potential for exposure.

Table 1: Crystalline Minerals found in Air and Settled Dust in Your Building (Building 1) ___________________________ and the Comparison Areas___________________________ Air: milligrams of mineral per cubic meter of air (mg/m3) Building Method or Crystalline Christobalite T ridymite Calcite Port/Lime Gypsum Mica Halite Number Location Quartz 1 PM100 ND ND NA ND ND Detect ND ND 1 PM10 ND ND NA ND ND Detect ND ND 1 PM4 ND ND NA Detect Detect Detect ND ND 1 PM2.5 NS NS NS NS NS NS NS NS Comparison PM100 ND ND NA ND ND ND ND ND Comparison PM10 ND ND NA ND ND Detect ND ND Comparison PM4 ND ND NA ND ND Detect ND ND Comparison PM2.5 ND ND NA ND ND Detect ND ND

Settled Dust: percent of sample (by weight) containing the mineral (%) 1 Common NS NS NS NS NS NS NS NS Area 1 Outdoor 26.6 ND ND 14.5 5.5 13.6 ND ND 1 Residence 1 19.1 ND ND 17.5 2.4 30.4 0.27 ND 1 Residence 2 31.4 ND ND 21.3 6.2 3.6 0.05 ND Comparison Common 1.3 ND ND 0.4 0.05 3.1 ND ND Area Comparison Outdoor NS NS NS NS NS NS NS NS Comparison Residences 2.2 ND ND 0.9 0.08 4.2 0.08 0.4 Notes: PM100: particles less than or equal to 100 microns in diameter PM10: particles less than or equal to 10 microns in diameter PM4: particles less than or equal to 4 microns in diameter PM2.5: particles less than or equal to 2.5 microns in diameter

ND; Not Detected NS: Not Sampled NA: Not Analyzed Results are maximum values found in comparison areas

NYC-WTC_000176064