OSHA air sample results chain of custody, 55 Church Street

NYC 9/11 Public Portal Document I t5 I VV LL LAbUKA I UKItS, INt~. L Environmental ooratory 47 Hudson Street, Ossining, New York 10562 NYSEL4P# 11142 NvtAP#200083-0 Alt1A # 100147

PCM AIR SAMPLE RESULTS • I Client: Bovis Lend Lease Date Collected: 02/20/02 • Date Rec'd (lab): 02/21/02 Project #: MBO-025AB Analysis Date: 02/21/02 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

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

Leonard Lewis Personal Entire O l Pers ----------------- -i----------------- _._._._._,_._._.gI~_._._._._._._._.! 3220 75 30 0.1144 STEL Building

Leonard_ Le_w_ _is_ Personal Entire 03Pers -._----------- PII 3222 300 120 0.0147 ` TWA Building L .t i~- - - Personal Entire 11Pers Pii 3230 432 180 0.0579 TWA Building Leonard Lewis Personal Entire 16Pers ----------- --------- 3235 352 160 0.0397 Building

19 Blank Blank N/A 3238 0 0 N/A

20 Blank Blank N/A 3239 0 0 N/A

Total Duration Sampled (min.) 490 Short Term Exposure Limit (STEL) 0.114.4 8 hr. Time Weighted Average (TWA) 0.0451

(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 1/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. Respiratory

* 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 McCar1- Laboratory Director

NYC-WTC 000103482