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Lino Lakes Local Water Management Plan 41 November 2018 – WSB Project No. 02988-500 2.10 Regulated Pollutant Sources Point Sources The MPCA is charged with regulating businesses that have applied for and received different types of environmental permits and registrations from the MPCA. The MPCA has also been tracking potentially contaminated sites since the early 1980s when major federal and state cleanup programs were created. Figure 2-15 depicts the locations of properties that have active environmental permits or have a record related to a potential environmental hazard. Additional information of specific sites can be found through the “What’s in My Neighborhood” feature on the MPCA website. Potential environmental hazards vary from properties where a spill or problem has already been cleaned up, to those currently being investigated or cleaned up. In addition, some sites depicted in Figure 2-15 have no record of known spills or problems; but rather mark locations where hazardous materials or wastes are used or generated. The most common types of sites in Lino Lakes are small to minimal quantity hazardous waste generators, multiple activity sites, and tank sites. The following descriptions are intended to elucidate sites illustrated in Figure 2-15 and provide the description given by the MPCA for each site type listed in the figure’s legend. The total number of each sites is given in the brackets below. § Unpermitted Dump Site [2]: Unpermitted dump sites are landfills that never held a valid permit from the MPCA. Generally, these dumps existed prior to the permitting program established with the creation of the MPCA in 1967. These dumps are not restricted to any type of waste but were often old farm or municipal disposal sites that accepted household waste. State assessment staff have investigated many of these dump sites. § Voluntary Investigation & Cleanup Site [2]: The Voluntary Investigation and Cleanup (VIC) Program is a non-petroleum brownfield program. The VIC program provides technical assistance to buyers, sellers, developers, or local governments seeking to voluntarily investigate or clean up contaminated land. Properties often enter the VIC program in preparation for sale, financing, or redevelopment. Voluntary parties that complete investigation and/or cleanup activities under MPCA oversight can receive liability assurances that protect them from future Superfund liability. In some cases, the MPCA may use institutional controls as part of the overall site remedy and notify interested parties of any property use conditions or restrictions. § Landfill, Permitted by Rule [1]: A landfill that is permitted by rule is not required to obtain an individual solid waste permit if it meets certain eligibility criteria. However, it must comply with waste management rules and regulations. Landfills may be permitted by rule if they have a small capacity and/or operate for a short period of time. Some yard waste composting facilities, recycling facilities, and energy recovery facilities are also permitted by rule. § Leak Site [3]: Leak sites are locations where a release of petroleum products has occurred from a tank system. Leak sites can occur from aboveground or underground tank systems as well as from spills at tank facilities. A leak can result from an accident or from activities that occur over a long time. The MPCA’s Petroleum Remediation Program staff investigates potential leaks and work to minimize or clean up contamination at those sites. § Tank Site [14]: A tank site is a place with an underground or aboveground storage tank of a certain size on the premises. One tank site may have multiple tanks, and these tanks may contain food products, petroleum products, or other substances. Tank sites include gas stations, bus companies, and trucking companies as well as factories that process sugar beets, ethanol, pulp and paper, or chemicals. The MPCA requires monitoring and maintenance at these sites, which helps to ensure that tanks do not cause environmental contamination. § Industrial Stormwater Permit [2]: Stormwater may come into contact with harmful pollutants, including toxic metals, oil, grease, de- icing salts, and other chemicals at industrial sites such as factories, salvage yards, and airports. 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 Pollution Prevention Plan, detailing the practices they will use to limit stormwater pollution. § Hazardous Waste, Small to Minimal Quantity Generator [62]: A small to minimal quantity generator is a facility that generates less than 1,000 kilograms (kg) (2,200 pounds) of hazardous waste or 1 kg (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 – 1,000 kg of hazardous waste per 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, SQGs and VSQGs must have current hazardous waste licenses. § Multiple Activities [31]: Multiple Activity sites are locations where there are multiple 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. Nonpoint Sources Nonpoint source pollution is caused by rainfall or snowmelt moving over and through the ground. Runoff picks up and carries away natural and human-made pollutants, finally depositing them into lakes, rivers, wetlands, and groundwater. Because of the nutrient (phosphorus) impairments of the Chain of Lakes, phosphorus is the most important nonpoint source pollutant in Lino Lakes. The current total phosphorus budgets for the Chain of Lakes are identified in the 2013 Lino Lakes Chain of Lakes Nutrient TMDL. Chloride pollution is an emerging contaminant of concern in much of the metro area. Snowmelt and spring runoff pick up road salts used for deicing purposes and deposits them into stormwater ponds, wetlands, lakes, and groundwater. Other sources include residential water softeners and municipal waste water treatment plant effluents. Once salts enter surface or groundwater, there are no existing methods available to remove it and at high concentrations it can be harmful to plants and wildlife as well as foul drinking water supply sources.
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