OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document

TESTWELL LABORATORIES, INC. L Environmental Laboratory 47 Hudson Street, Ossining, New York 10562 HYS ELAP # 11142

NVLAP #200083-0

r-- AiHA# 100147

PCM AIR SAMPLE RESULTS Client: Bovis Lend Lease Date Collected: 02/14/02 Date Rec'd (lab): 02/15/02 Project #: MBO-025AB Analysis Date: 02/15/02 Analyst: J. Yarusso Sample Location: The Millenium Hilton 55 Chruch Street Analytical Method: NIOSH 7400 New York, New York

Field Technician: K. Laverenko/S. Manukov

Sample #: Sample Location: Sample Type Work Location 1 [ 02PCM # Volume Duration Concentration (min.) j f/cc

J. Hughs Personal Scaffold 02Pers -------- - - ---- 3091 450 180 0.0095 pll TWA Entire . Personal Scaffold 10Pers 3097 360 150 0.0086 P11 TWA Entire

12 Blank Blank Scaffold Entire 3101 0 I 0 N/A

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

Total Duration Sampled (min.) 330 8 hr. Time Weighted Average (TWA) 0.0063

(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.

Respiratory Protection: Half face negative air respirator equip with HEPA cartridge.

' Limit of quantitation based on volume of air collected and 5.5 t/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 analysisireport shall not be reproduced except in full, without the written approval of Testwell Laboratories, Inc.

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Deborah McCarf - Laboratory Director

NYC-WTC 000103497