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Part II. Well Construction Section 8. Well Location With Respect to Pollutants and Contaminants, and Structures. Note. The title of Section 8 has been revised. Section 8 (page 26 of Bulletin 74-81) has been revised to read as follows: "A. Separation. All water wells shall be located an adequate horizontal distance from known or potential sources of pollution and contamination. Such sources include, but are not limited to: • sanitary, industrial, and storm sewers; • septic tanks and leachfields; • sewage and industrial waste ponds; • barnyard and stable areas; • feedlots; • solid waste disposal sites; • above and below ground tanks and pipelines for storage and conveyance of petroleum products or other chemicals; and, • storage and preparation areas for pesticides, fertilizers, and other chemicals. Consideration should also be given to adequate separation from sites or areas with known or suspected soil or water pollution or contamination. The following horizontal separation distances are generally considered adequate where a significant layer of unsaturated, unconsolidated sediment less permeable than sand is encountered between ground surface and ground water. These distances are based on present knowledge and past experience. Local conditions may require greater separation distances to ensure ground water quality protection. Minimum Horizontal Potential Pollution Separation Distance Between or Well and Miowm or Contamination Snurce Potential Snurce Any sewer line (sanitary, industrial, or storm; 50 feet main or lateral) Watertight septic tank or subsurface sewage 100 feet leaching bold GO Pool or seepage pit 150 feet Animal or fowl enclosure 100 feet If the well is a radial coileclar well, minimum separation distances shall apply to the furthest extended point of the well. 12-