Respondent is a municipality operating two “stationary sources”, the Water Treatment Plant (WTP) and the Waste-Water Treatment Plant (WWTP). At the time of the inspection, respondent had submitted and registered RMPlans for each of its stationary sources at the WTP and the WWTP and had developed an RMProgram accidental release prevention program for each of these two (2) stationary sources. The WTP included one (1) RMProgram regulated water treatment process. The WWTP included two (2) RMProgram regulated wastewater treatment processes. The WTP process represents an RMProgram level 3 covered process which at the time of the inspection stored or otherwise used 12,000 pounds of chlorine, in an amount exceeding its applicable threshold of2,500 pounds. The WWTP processes represented two (2) RMProgram level 3 covered processes, one of which stored or otherwise used 6,000 pounds of chlorine and one of which stored or otherwise used 6,000 pounds of sulfur dioxide in amounts exceeding their respective applicable thresholds of 2,500 and 5,000 pounds.