OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document nuton

wienium notes

Sample Sample Name Last 4 #'s Duration Number Result f/cc Date Last, First of SS# Type of Activity (min.) 02/15/02 04 Carlsen, Michael 14-22nd Floor 30 0.0360 02/15/02 05 Carlsen, Michael 14-22nd Floor 120 0.0135 02/15/02 09 Carlsen, Michael 14-22nd Floor 180 0.0062 Total Duration Sampled (min.) 330 Short Term Exposure Limit (STEL) 0.0360 • 8 hr. Time Weighted Average (TWA) 0.0080 02/15/02 01 McTough, Danny scaffold entire 180 0.0060 02/15/02 06 McTough, Danny scaffold entire 200 0.0056 Total Duration Sampled (min.) 380

02/15/02 02 Hughus, J. PII 8 hr. Time Weighted Average (TWA) scaffold entire 180 0.0046 0.0060 • 02/15/02 07 Hughus, J. scaffold entire 200 0.0056 Total Duration Sampled (min.) 380 8 hr. Time Weighted Average (TWA) 0.0046 02/15/02 03 Byine, R. scaffold entire 180 0.0060 02!15/02 08 Byine, R. scaffold entire 200 0.0056 Total Duration Sampled (min.) 380 0 8 hr. Time Weighted Average (TWA) 0.0046 02/15/02 10 Milian, J. entire building access 180 0.0060 `---------------- Total Duration Sampled (min.) 180 8 hr. Time Weighted Average (TWA) 0.0023 (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.

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NYC-WTC 000103515