OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document Millenium Hilton Hotel _ Sample Sample Name ast 4 #'s Date Number Last, First of SS# Type of Activity Duration Result f/cc (min.) 02/14/02 1 McTough, Danny scaffold entire 02/14/02 5 30 0.0360 McTough, Danny scaffold entire 300 0.0047 Total Duration Sampled (min.) 330 Short Term Exposure Limit (STEL) 0.0360 8 hr. Time Weighted Average (TW 0.0052 02/14/02 2 Byine, R. scaffold entire 02/14/02 6 30 0.0360 Byine, R. scaffold entire 300 0.0108 Total Duration Sampled (min.) 330 Short Term Exposure Limit (STEL) 0.0360 8 hr. Time Weighted Average (TW 0.0090 02/14/02 3 Soto, Victor glass delivery 02/14/02 7 30 0.0360 Soto, Victor glass delivery 02/14/02 9 178 0.0077 Soto, Victor glass delivery 180 0.0195 Total Duration Sampled (min.) 388 Short Term Exposure Limit (STEL) 0.0360 8 hr. Time Weighted Average (TW 0.0124 - 02/14/02 4 Carlsen, Michael glass delivery 02/14/02 8 30 0.0392 Carlsen, Michael glass delivery 02/14/02 178 0.0154 10 Carlsen, Michael glass delivery 180 0.0782 Total Duration Sampled (min.) 388 Short Term Exposure Limit (STEL) 0.0392 8 hr. Time Weighted Average (TW. ,, 0.0375 (c) Permissible exposure limits (PELS)

(c)(2) Excursion limit. The employer shall ensure that no employee is exposed to an airborne concentration of asbestos in excess of 1.0 fiber per cubic centimeter of air (1 f/cc) as averaged over a sampling period of thirty (30) minutes, as determined by the method prescribed in Appendix A to this section, or by an equivalent method. (c)(2) Excursion limit. The employer shall ensure that no employee is exposed to an airborne concentration of asbestos in excess of 1.0 fiber per cubic centimeter of air (1 f/cc) as averaged over a sampling period of thirty (30) minutes, as determined by the method prescribed in Appendix A to this section, or by an equivalent method.

NYC-WTC 000103533