WTC emergency safety plan draft, Sept 2001

NYC 9/11 Public Portal Document

World Trade Center Emergency Project Environmental, Safety, and Health Plan Draft - Revision A 30 September 2001

2.4.5.4 Sample Shipment Samples 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.

• Filter Cassettes - Filter cassettes should be mailed in a cardboard box and packed with paper. Avoid using packaging peanuts or other static producing material because the static charge will draw material away and off the filter surface. This is especially true for asbestos fiber samples. Filter cassettes shall be taped over the top and bottom to keep the plugs on the end of the cassette and to prevent sample tampering prior to analysis. • Charcoal Tubes - Charcoal tubes should be mailed in a cardboard box and adequately packaged to prevent breakage during shipment. Bulk solutions must never be shipped in the same package as charcoal tubes. • Bulk Samples - Bulk samples shall be packaged in labeled containers compatible with the sample and tightly sealed to prevent leaks and spills. Keep in mind that some bulk samples may be considered as hazardous materials by the Department of Transportation and have special requirements for packaging, labeling, and method of shipment.

2.4.5.5 Data Review The designated IH Contractor Safety Representative or other qualified person will assess and interpret monitoring data and results based on standard industry practices and his/her professional judgment. All calculations performed on raw data (e.g. time-weighted-average calculations) shall be documented and reviewed by another qualified person.

2.4.5.6 Recordkeeping and Posting The contractor performing work is responsible for maintaining adequate records of site monitoring activities, communicating or posting exposure information, and informing employees of monitoring results as may be required. All integrated personal air sampling results shall be communicated in writing to affected employees within 5 days of receiving laboratory results. All exposure monitoring and sampling results shall be maintained at the site and made available for inspection and review by the DDC designated industrial hygienist. All employee exposure records are to be kept by the employer and made available in accordance with 29 CFR 1910.1020.

2.4.6 Additional Site Monitoring Considerations

2.4.6.1 Monitoring Frequency Monitoring or sampling frequency will be influenced by a number of factors including the following; • frequency of contaminant release (i.e., continuously, intermittently, one time release) • frequency of operation • number of samples required • number of different work groups requiring assessment • number of work shifts requiring monitoring.

Each of these factors should be considered to determine the monitoring frequency.

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NYC-WTC_000164700