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AASHTO R 21
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AASHTO R 21 96th Edition, January 1, 1996 Standard Practice for Drilling for Subsurface Investigations-Unexpectedly Encountering Suspected Hazardous Material
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Description / Abstract:
This practice is intended to help protect drillers in the event
they unexpectedly encounter suspected hazardous materials while
performing subsurface investigations. This is accomplished by
training the drillers, identifying precautions to minimize risks of
contamination, and establishing a procedure to follow if suspected
hazardous material is encountered.1
This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this procedure to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.
1AASHTO Hazardous Waste Guide for Project Development, February 1990.
This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this procedure to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.
1AASHTO Hazardous Waste Guide for Project Development, February 1990.