OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document • Sample Sample fName Last 4 #'s Duration Date Number ILast, First of SS# IType of Activity (min.) Result f/cc 02/20/02 03 McTough, Danny scaffold entire 210 0.0234 02/20/02 08 McTough, Danny scaffold entire 150 0.0177 Total Duration Sampled (min.) 360 8 hr. Time Weighted Average (TWA) 0.0158 02/20/02 01 Hughu7I scaffold entire 210 0.0051 02/20/02 06 Hughus, J. scaffold entire 150 0.0089 Total Duration Sampled (min.) 360 8 hr. Time Weighted Average (TWA) 0.0050 02/20/02 09 Millan P11 Engineer Total Duration Sampled (min.) 180 180 0.0060

8 hr. Time Weighted Average (TWA) 0.0023 02/20/02 02 Salerno, J. scaffold entire 210 0.0051 02/20/02 07 Salerno, J. scaffold entire 150 0.0075 Total Duration Sampled (min.) 360 8 hr. Time Weighted Average (TWA) 0.0046 02/20/02 04 Puntillo, J. Engineer 30 0.0360 02/20/02 05 Puntillo, J. Engineer _ 120 0.0090 Total Duration Sampled (min.) L.-.-.-.-._.-.-.-.- 150 Short Term Exposure Limit (STEL) 0.0360 8 hr. Time Weighted Average (TWA) 0.0045 (c) Permissible exposure limits (PEES) (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 000103471