DOVER, Del. — A former manager of a Delaware oil recycling company charged with federal environmental crimes has agreed to plead guilty in the case

Lance Charen, a former manager for International Petroleum Corp., was indicted in February on charges of improperly handling hazardous waste, falsifying reports, tampering with monitoring devices, and other crimes.

Charen was scheduled to enter a guilty plea Wednesday, but the judge on Monday granted a defense request to postpone the hearing until next week.

Authorities say IPC, which operated the facility from 1992 to 2012, routinely falsified reports about chemicals being dumped into Wilmington’s sewer system.

IPC pleaded guilty to conspiring to violate the Clean Water Act and transporting hazardous waste without a manifest. It was ordered to pay a $1.3 million fine and $2.2 million in restitution.