Using prior asbestos monitoring for a negative exposure assessment

December 4, 1995

Kenneth H. Mueller, Esq.
Greentree Consulting Incorporated
[Recipient address omitted]
Dear Mr. Mueller:

This is to confirm your phone conversation on October 20, with Doug Ray of my staff, that your interpretation (letter of June 12th) of 1926.1101(f)(2)(iii)(B) of the asbestos standard is correct. More specifically, per your conversation with Doug Ray, a negative exposure assessment has been established when the workplace conditions "closely resemble" the process, type of material, control methods, work practices, environmental conditions, and employee training of an asbestos job monitored within the past 12 months. Documentation should address the above 6 areas for a negative exposure assessment, and should be available at each new worksite.

We apologize for the delay in responding to your letter of June 12, and any inconvenience it may have caused.

Sincerely,
Ruth McCully, Director
Office of Health Compliance

[Requester letter reproduced on OSHA page; omitted here.]