Used Oil: Agriculture Free Drop-Off Locations for California Growers and Ranchers For more information contact: Certified Collection Center, UsedOilCCC@calrecycle.ca.gov or Household Hazardous Waste, UsedOilHHW@calrecycle.ca.gov. Related Links Used Oil Home Recycling/Disposal Collection Center Operators Generators Develop a Local Program General Public Resources Events Household Hazardous Waste