OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document 4

L TESTWELL LABORATORIES, INC. Environmental Laboratory 47 Hudson Street, Ossining, New York 10562 NYS ELAP u 11142 rrvuP0200093-o AIHA 0100147

CM AIR SAMPLE RESULTS Client: Bovis Lend Lease Date Collected: 02/15/02 Date Rec'd (lab): 02/16/02 Project #: MBO-025AB Analysis Date: 02/16/02 Analyst: L. Chivarini Sample Location: The Millenium Hilton • 55 Chruch Street Analytical Method: NIOSH 7400 New York, New York

Field Technician: K. Laverenko/S. Manukov

Sample —Work Duration Concentration Sample #: Sample Location: 02PCM # Volume Type Location (min.) f/cc

J.Hughs._._._._._.. Personal Scaffold 02Pers pll 2887 450 180 0.0060 TWA Entire

07Pers _._._.J•. Hughs_._._._._. Personal Scaffold 2892 480 200 0.0056 PII TWA Entire

Scaffold 11 Blank Blank 2896 0 0 N/A Entire

12 Blank Blank N/A 2897 0 0 N/A

I Total Duration Sampled (min.) 380 8 hr. Time Weiqhted Average (TWA) 0.0046

(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 floc) 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.

Respiratory Protection: Half face negative air respirator equip with HE?A cartridge.

• Limit of quantitation based on volume of air collected and 5.5 f/100 fields as per the NIOSH 7400 method. The report value is calculated by using the higher value of either the actual concentration or the limit of quantification reported at P(0.05) indicating the 95% • confidence level at 2 standard deviations. " Sample information is provided by the client & presented as stated. "' Laboratory QC data available upon request "" The laboratory has no control over air sampling collection. Reports are the confidential property of our clients. This certificate of analysis/report shall not be used by the client to claim product endorsement by the National Voluntary Laboratory Approval Program (NVLAP) or any agency of the United States Government: This certificate of analysis/report shall not be -+ reproduced except in full, without the written approval of Testwell Laboratories, Ina

Deborah McCart - Laboratory Director

NYC-WTC 000103518