OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document Millenium Hilton Hotel Sample Sample Name Last 4 #'s Duration Result f/cc • Date Number Last, First of SSA Type of Activity (min.) 02/14/02 1P Sackowski, D. 'entire building access 30 0.0360 02/14/02 3P Sackowski, D. entire building access 210 0.0051 02/14/02 8P Sackowski, D. entire building access 220 0.0334 Total Duration Sampled (min.) 460 Short Term Exposure Limit (STEL) 0.0360 8 hr. Time Weighted Average (TWA) 0.0198 02/14/02 2P Lewis, L entire building access 30 0.0687 02/14/02 02/14/02 4P 7P Lewis, L Lewis, L PII entire building access ,entire building access Total Duration Sampled (min.) 210 240 480 0.0051 0.0222

Short Term Exposure Limit (STEL) 0.0687 A 8 hr. Time Weighted Average (TWA) 0.0176 02/14/02 5P Puntillo, Joe entire building access 30 0.0360 02/14/02 6P Puntillo, Joe entire building access 120 0.0084 Total Duration Sampled (min.) 150 Short Term Exposure Limit (STEL) 0.0360 0 8 hr. Time Weighted Average (TWA) 0.0044 02/14/02 9P Millan, Julio X)CXX 150 0.0185 Total Duration Sampled (min.) 150 Short Term Exposure Limit (STEL) 0.0185 8 hr. Time Weighted Average (TWA) 0.0058 (c) Permissible exposure limits (PELS) L (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 0 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.

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NYC-WTC 000103542