TITLE
Quality Assurance Planning for Stationary
Source Field Sampling

AUTHOR(S)
Merrill D. Jackson and M. Rodney Midgett

PERFORMING ORGANIZATION NAME AND ADDRESS
U.S. Environmental Protection Agency
SMRB, MRDD, AREAL
Research Triangle Park, NC 27711

SPONSORING AGENCY NAME AND ADDRESS
U.S. Environmental Protection Agency
SMRB, MRDD, AREAL
Research Triangle Park, NC 27711

ABSTRACT
Stationary source stack sampling procedures are used to determine
the amount of emissions as required under the Resource Conservation
Recovery Act, Appendices VIII and IX, and the Clean Air Act
Amendments (CAAA) of 1990, Title III.  Sampling procedures are
costly and require much planning and time to complete.  Most effort
on implementing quality assurance (QA) in the past has centered on
the analytical and laboratory portion of the test.  However, the
laboratory result, no matter how good, is only as good as the field
sample that has been presented.  Errors occurring during field
sampling might not be discovered until after the sampling phase of
the test is completed and after samples are in the analytical
phase.  This could result in another expensive sampling trip.  One
way to reduce the chance of errors is to have and follow a QA plan. 
This paper describes the planning phase for the field study, errors
that may occur during the sampling phase, and how the QA plan might
prevent or minimize errors during field sampling.