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Introduction and Purpose
After considerable debate and negotiation, the ASTM D-22.03 committee approved a test method that utilizes digital cameras and associated software to make stack opacity determinations. The method is presently restricted to stacks less than 7 feet in diameter. The method was developed to mimic EPA Method 9, and does not take full advantage of the technology offered by the digital cameras available today; rather, it uses the same acceptance criteria applied to human observers qualified via “smoke school.” We believe that the method should be able to stand alone technically as well as be a Method 9 equivalent. Project Scope-of-Work The project will focus on developing data suitable for the precision and bias calculations mandated by ASTM. The project will use the commercial software with multiple digital cameras compared to a certified transmissometer at a “smoke generator” used for Method 9 training. The smoke generator testing will be modified from standard Method 9 training. The data generated will cover the full range required by Method 9 but will concentrate on the low 0-20% and 20-40% opacity ranges more typical of steam generating boilers. Multiple opacity readings will be made at the lower opacity levels to generate a robust statistical data set. The smoke generator test program will be followed by field testing on tall large-diameter stacks with certified opacity monitors. Field studies will cover both wet and dry stack applications. The project will be conducted with advice and consultation with the ASTM D-22.03 committee working group on data and procedure needs to support future modification of the current ASTM Digital Opacity Method. The Defense Department is still very interested in developing the ASTM method further to include fugitive opacity measurements. To provide maximum project efficiency, we will also be consulting with the Defense contractor on its efforts to expand the method to include area/fugitive opacity measurements. Project Value The proposed project will provide a more reliable opacity method for large stacks, potentially eliminating much of the variability and inconsistency of current Method 9 readings. The resulting revision to the ASTM Digital Opacity Method will be a major step forward in opacity observations, removing subjectivity and providing a documented record of opacity events. Drivers and Trends The use of digital camera technology for opacity measurements is a significant technology advance that can potentially allow determination of stack opacity beyond the plant fence line. It is important to ensure that the technology is applied correctly and takes full advantage of its capabilities, removing the subjectivity inherent in the current Method 9 procedures. Deliverables A final report will summarize the performance of the digital opacity methodology, along with the required ASTM bias and precision data. This report will include proposed revisions to the existing ASTM Digital Opacity Method. Cost of Project This project is structured as a EPRI Tailored Collaboration (TC) project. You DO NOT have to be an EPRI member to participate. You DO NOT have to be a utility to participate. The estimated cost to complete this project is $220,000. The price to participate is $44,000 and assumes five funding participants. If there are more than five participants, the cost for each participant will be proportionally reduced. EPRI member companies can use Tailored Collaboration (TC) funds for up to half their contribution. Who Should Join Source owners subject to opacity regulations and concerned with active enforcement by Method 9 determinations. Technical and Information Contacts Please call or Email either of the persons listed below to join the project or if there are any questions or the need for further information. Richard McRanie Chuck Dene | Home | News | CAM | FTP Library | Projects | Links | Contact | Services | Feedback | RMB Consulting &
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