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City of Lino Lakes SWMP | February 8, 2013 Draft | 51 maintenance at these sites, which helps to ensure that tanks do not cause environmental contamination.  Industrial Stormwater Permit : At industrial sites such as factories, salvage yards and airports, stormwater may come into contact with harmful pollutants, including toxic metals, oil, grease, de - icing salts and other chemicals . Industrial stormwater permits are designed to limit the amount of these contaminants that reaches surface water and groundwater, by requiring good practices for storing and handling materials. Facilities with these permits must prepare a Stormwater Pollu tion Prevention Plan, detailing the practices they will use to limit stormwater pollution.  Wastewater Dischargers : A wastewater discharger is a facility that generates or treats wastewater for discharge onto land or into water. Wastewater dischargers incl ude sewage treatment plants, as well as ships with ballast water permits, and some manufacturers. Minnesota Pollution Control Agency (MPCA) permits may require treatment and monitoring, and limit the amount of contaminants that a facility can release into the environment. Wastewater permits may be classified as SDS or NPDES/SDS. SDS stands for State Disposal System, and indicates that the facility needs to follow Minnesota rules and regulations for wastewater. NPDES is the National Pollutant Discharge Elimi nation System, and indicates that the facility is also subject to the regulations of the federal Clean Water Act.  Feedlots : Feedlots may be small farms or large -scale commercial livestock operations. They are places where animals are confined for feeding, breeding or holding. The Minnesota Pollution Control Agency (MPCA) and its county partners place requirements on how manure is managed at feedlots, so that it does not contaminate nearby surface water and groundwater. Most feedlots in Minnesota are only r equired to register with the MPCA, but larger feedlots may be required to obtain a National Pollutant Discharge Elimination System (NPDES) permit. This means that they must submit plans for how they will reduce their impact on the environment, including th eir plans to manage manure and control air pollution from the feedlot.  Hazardous Waste, LQG : A large quantity generator (LQG) is a facility that generates at least 1,000 kilograms (2,200 pounds) of hazardous waste or 1 kilogram (2.2 pounds) of acutely haz ardous waste per calendar month. A Minnesota Pollution Control Agency (MPCA) permit is not required for a large quantity generator, but the facility must have a current hazardous waste license. This means that they must tell the MPCA what kinds of waste th ey generate, how much waste they generate, and how they dispose of the waste.  Hazardous Waste, Small to Minimal Quantity Generator : A small to minimal quantity generator is a facility that generates less than 1,000 kilograms (2,200 pounds) of hazardous wa ste or 1 kilogram (2.2 pounds) of acutely hazardous waste per calendar month. These facilities have less stringent rules than large quantity generators. This group includes Small Quantity Generators (SQGs), which produce 100 - 1000 kg of hazardous waste pe r month; Very Small Quantity Generators (VSQGs), which produce less than 100 kg of hazardous waste per month; and Conditionally Exempt Generators, which produce less than 100 kg or 10 gallons of hazardous waste per year. Like large quantity generators, SQG s and VSQGs must have current hazardous waste licenses.  Multiple Activities : Multiple Activity sites are locations where there are multiple Minnesota Pollution Control Agency (MPCA) activities occurring. These sites vary from facilities with a wastewater permit and an air quality permit to cleanup sites with more than one permit.