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Show REVISIONS TO PROPOSED ENHANCED MONITORING RULE Based upon comments received on the proposed Enhanced Monitoring rule, the EPA indicated on November 9, 1994, that only the proposed monitoring would have to be justified and that the best monitoring was no longer to be required. Further, the EPA indicted that the total number of test runs to certify a PEMS would be nine and that the five PEMS Enhanced Monitoring Protocols proposed by the Pavilion workgroup on October 26, 1994, would be included in the fIrst issue of the Enhanced Monitoring Reference Document. The Pavilion workgroup demonstrated to the satisfaction of the EPA's source air monitoring experts that the five PEMS installations were equivalent to traditional CEMS in all of the applications. The five installations were: 1. Monitoring of NOx emissions from a 221 mmBTUIhr heat input natural gas fired boiler subject to 40 CPR Part 60, Subpart Db; 2. Monitoring of NOx and CO emissions from an industrial furnace; 3. Monitoring of NOx and CO emissions from a natural gas-fired turbine with dry-low NOx· , 4. Monitoring of NOx and CO emissions from a natural gas-fired turbine with steam injection; and 5. Monitoring of NOx emissions from a natural gas-fired reciprocating internal combustion engine. In April 1995 , the EPA announced that the proposed Enhanced Monitoring rule was being withdrawn and revisited. However, the EPA's Emission Measurement Center did inform Pavilion on May 4, 1995, that the PEMS Enhanced Monitoring Protocols were oomplete and that PEMS were a viable alternative to hardware CEMS. 4 |