Ambient ground level monitoring: a sensible control system for the industry.

Sulfur emission rules are being changed. This action and a proposed EPA Supplementary Control strategy that would allow industrial facilities to continue their operations based on emission measurements and weather conditions is a logical step. Nevertheless, other EPA requirements and limitations are not acceptable to the electric power generating industry. Effective sulfur removal processes and equipment are yet beyond the "state of the art" and thus are not cost effective capital investments while the technology is in development. Field proven ambient monitoring networks are available now to implement fuel switching which is the preferred method of the power industry. This permits remaining within ambient limits, thus fulfilling the basic requirements of the primary SQX stand"... to protect the public health.".