NYC-WTC_000188121

NYC 9/11 Public Portal Document 10/01/01 MON 10:09 FAX 212 695 5984 Bechtel URS Greiner JV 141006

Personal sampling and analysis will be performed in accordance with the OSHA Industrial Hygiene Technics Manual, the National Institute for Occupational Safety and Health (NIOSH) Manual of Analytical Methods, or other acceptable industrial hygiene practices. Only analytical laboratories accredited by the American Industrial Hygiene Association shall perform sample analysis. The laboratory analysis will include field blanks, as required by the individual method or laboratory. The laboratory shall also be successful participants in the NIOSH Proficiency Analytical Testing program for the appropriate analytical category. Prior to sampling, the specific sampling and analytical method should be discussed with the receiving laboratory to determine any special requirements or variations to established methods necessary to collect an acceptable sample (note this may be required for high dust loaded samples). 7.1.1 Noise Monitoring Noise monitoring shall be conducted for operations, which may exceed an 8-hour time weighted average sound level of 85 dBA (Refer also to Section). Noise monitoring shall be performed in accordance with 29 CFR 1910.95 using a SLM or noise dosimeter as appropriate.

Heat stress monitoring shall be conducted as necessary to assist in determining and maintaining appropriate work/rest regimens.

Other Site Monitoring Other site monitoring may be necessary depending on the job task or site location of the work. The Contractor may be requested to provide additional area monitoring necessary to adequately assess and control worker exposure. Area monitoring will include asbestos and lead monitoring plus respirable and total dust in selected break and rest areas.

Sampling (Quality Persons conducting site monitoring shall have adequate training and/or . experience coihrntosurate with the type and complexity of the monitoring program. They should be able to understand the limitations of the equipment they use, proper methods of calibration, proper metl^ods of sealing and shipping samples and the importance of chain-of-custody.

Ail instruments shall be calibrated or checked for proper function if appropriate before use for each shift. Instrument checks may be necessary during the day and at the end of use to confirm instrument accuracy. Duplicate readings may be taken to confirm individual instalment response. Air sampling pumps will be calibrated with prinoary standards (e.g., dry calibrator or bubble-tube method). Instruments shall be operated and maintained in accordance with the manufacturer's specifications. The manufacturer’s operation and maintenance manual will be kept at the site work location for each type of instrument that is being used. i

Sandies sent to a laboratory for analysis shall be packaged to prevent damage, spillage, or leaks. An air or bulk sample data sheet with chain-of-custody information must accompany any sample shipped.

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CITY_21MC100_007083336

NYC-WTC_000188125