NORTH SALT LAKE — Stericycle has agreed to a $2.3 million fine and will cease operating in North Salt Lake under a proposed settlement agreement inked with state regulators. Under the agreement — which requires the approval of the Utah Air Quality Board — Stericycle would pay half of the total penalty, a little more than $1.1 million immediately, and agree to stop operating in North Salt Lake within three years of receiving its new operational permits for a planned move to Tooele County. The other half of the penalty would be waived and handled as a credit once the permits are obtained and the move completed. The pending settlement includes the largest fine in the history of the Utah Division of Air Quality and is the maximum civil penalty that could have been levied. It was based on the number of days the company operated its plant out of compliance with federal Clean Air standards.