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Related Experiment Videos

Lessons learned in preparing method 29 filters for compliance testing audits.

R F Martz1, J E McCartney, J T Bursey

  • 1Eastern Research Group, Morrisville, North Carolina 27560, USA. rob.martz@erg.com

Quality Assurance (San Diego, Calif.)
|May 15, 2002
PubMed
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To ensure accurate emissions compliance testing, pre-screening filters for background metal contamination is crucial. Eastern Research Group (ERG) found significant filter variations, recommending large lot purchases and random filter analysis for EPA Method 29 testing.

Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Industrial Hygiene

Background:

  • Compliance testing requires analyzing audit samples concurrently with stack samples.
  • Eastern Research Group (ERG) supports the EPA's Stationary Source Audit Program (SSAP).
  • Audit materials, including spiked filters for EPA Method 29, are essential for regulatory agencies.

Purpose of the Study:

  • To evaluate background contamination in quartz fiber filters for EPA Method 29.
  • To develop and test procedures for ensuring clean filter materials for audit samples.
  • To identify best practices for filter selection and preparation in emissions testing.

Main Methods:

  • Evaluated three vendor sources of quartz fiber filters for background metal contamination.

Related Experiment Videos

  • Developed a procedure for testing new filters and assessed an acid rinse cleaning method.
  • Analyzed filter background levels from different vendors and within vendor lots.

    • Main Results:

    • Significant variations in background metal levels were observed across different filter vendors and lots.
    • An acid cleaning step showed minor improvements but was not significant for most target metals.
    • Previous compliance tests have been repeated due to suspect background contamination.

    Conclusions:

    • Purchase filters for EPA Method 29 testing in the largest possible lots.
    • Pre-screen new boxes and lots of filters, and conduct random filter analysis before field use.
    • Use filters from a screened box for both testing and field blanks to ensure quality assurance.