OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document t

L TESTWELL LABORATORIES, INC. 1 1 Environmental Laboratory 47 Hudson Street, Ossining, New York 10562 NYS ELAP 9 11142 NVLAP 8 2CC083-0 AIHA 0 100147

PCM AIR SAMPLE RESULTS Client: Bovis Lend Lease Date Collected: 02/19/02 Date Rec'd (lab): 02/20/02 Project #: MBO-025AB Analysis Date: 02/20/02 Analyst: D. Agrest Sample Location:The Millenium Hilton 55 Chruch Street Analytical Method: NIOSH 7400 New York, New York

Field Technician: K. Laverenko/S. Manukov

I [ Sample #: Sample Location:

Danny McTough Sample Type

Personal Work Location

Scaffold 02PCM # Volume Duration Concentration (min.) f/cc

03Pers --.- Pll 3092 450 180 0.0183 TWA Entire

09Pers

12 Danny McTough Pll

Blank Personal TWA

Blank Scaffold Entire

N/A 3098

3101 360

0 1 150

0 0.0094

N/A

13 Blank Blank N/A 3102 0 0 N/A

Total Duration Sampled (min.) 330 8 hr. Time Weighted Average (TWA) 0.009E

(c) Permissible exposure limits (PELS)

(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 itimeter 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 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.

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, Inc.

Deborah McCarf - Laboratory Director

NYC-WTC 000103499