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present in dissolved forms. They can be toxic in certain concent humans. Polycyclic aromatic hydrocarbons(PAHs) . PAHs are a class of chemicals that harm fish and, with prolonged exposure, pose a risk of cancer in humans. Common sources are coal-tar based sealcoat, petroleum products and oil. A current challenge for many cities, including Roseville, is how to cost-effectively remove sediments from stormwater ponds that have PAH levels that require disposal at a landfill. Polychlorinated biphenyls (PCBs). PCBs are a class of chemicals manufactured and commonly used from 1930 to 1979 in electrical and hydraulic prod readily break down in the environment and bioaccumulate in organ ultimately humans who ingest the fish. The EPA and other organiz to be probable human carcinogens. Perfluorochemicals (PFCs). PFCs are a family of chemicals used to make products resist heat, oil, stains, grease, and water. Examples of PFCs ar (PFOS) and perfluoroocanic acid (PFOA) which are extremely resis the environment and bioaccumulate in animals and humans. In animal studies concentrations of PFCs have been shown to have adverse health ef humans are still unclear. Endocrine disrupting compounds (EDCs). EDCs are not a discrete class of chemicals but rather a chemical which mimics or blocks normal hormonal function in animals and humans (a process called endocrine disruption). In animals, expo associated with reduced reproductive success, reduced survival, typing, and developmental abnormalities. Potential EDCs include chemicals su polybrominated biphenyls (PBBs), bisphenol A (BPA), phthalates, found in a range of products from pharmaceuticals and personal c pesticides. Aquatic nuisance and invasive species. Aquatic plants such as Eurasian Watermilfoil and Purple Loosestrife have become well established throughout c Twin Cities Metropolitan area and can create significant impacts resources if not managed. In addition, aquatic animals such as t create nuisance problems in area lakes and have the potential to character and quality of the resource. The following link provid some of the more prevalent aquatic invasive species in the regio www.invasivespeciesinfo.gov. Many of the pollutants listed above are either already in the en or are found in many commonly used products (e.g. Chloride, PAHsCs) and are difficult to remove from the aquatic environment once introduced with trad To avoid potentially expensive remediation/treatment costs associated with many of these pollutants, the City will need to take a proactive approach with prevention/reduction through considerable educational efforts and public policies. Examples of efforts the City has already made towards pollution road salt usage and prohibiting the use of coal-tar based sealers. The City also has an illicit discharge ordinance which prohibits illicit discharge of non-stormwater into the storm sewer system and intentionally disposing of grass, leaves, dirt, or landscape mat resource, natural conveyance, or street/road/alley. Comprehensive Surface Water Management PlanROSEV120222 City of RosevillePage 22