R 325.1561 Sewage disposal in modern campgrounds.

Rule 11. (1) A campground owner shall connect his or her campground to a local government sewer system, when available. A campground owner and person preparing campground plans shall propose and provide a sewage treatment and disposal system that is acceptable to the department if a local government system is not available. (2) A person designing a campground sewage disposal system shall base the design capacity of a facility described in subrule (1) of this rule on the following minimum estimated daily liquid flows: (a) For sites that have water and sewer outlets available to each site - 75 gallons per site. (b) For sites served by service buildings - 75 gallons per site. (c) For primitive sites operated in conjunction with a modern campground - 30 gallons per day per primitive site. (d) For sites for single sectional mobile homes and park model recreational units - 150 gallons per site. (e) For other facilities operated in conjunction with a campground, a person designing a campground sewage disposal system may use the "Michigan Criteria for Subsurface Sewage Disposal," dated April 1994, as a reference in estimating daily design flow. This publication can be obtained from the Michigan Department of Environmental Quality, Drinking Water and Radiological Protection Division, Environmental Health Section, P.O. Box 30630, Lansing, Michigan 48909-8130. (3) A campground owner shall ensure that a sewer service riser which is located at a site on a sewer system is trapped. A campground owner shall ensure that a service riser which is designed for winter use is trapped below the frost line. A campground owner shall ensure that the trap and riser is constructed of cast iron or rigid plastic pipe as approved by the plumbing division of the Michigan department of consumer and industry services. A campground owner shall ensure that the top of the riser extends not less than 2 inches above the surrounding ground surface. A campground owner shall ensure that a riser is capped when not in use. A campground owner shall ensure that the sewer service riser is not located closer than 5 feet from a water riser. (4) A campground owner shall provide a sewer service riser to a campsite occupied by a single sectional mobile home. (5) A campground owner shall ensure that a gravity sanitary sewer has sufficient capacity to accommodate the maximum hourly flow from the portion of the campground being served and is not less than 4 inches in diameter. (6) A campground owner shall ensure that a sanitary sewer has a minimum depth of bury of 2 feet. If the sanitary sewer is designed for winter use, then the campground owner shall ensure that the sewer system has a minimum depth of bury of 3.5 feet or more than 3.5 feet in areas where the frost line typically extends below 3.5 feet. (7) A campground owner shall ensure that a sanitary sewer is installed with sufficient slope to maintain a velocity of 2 feet per second at design flow. (8) A campground owner shall ensure that all sanitary sewers which are less than 10 inches in diameter have cleanouts located at the end of each sewer line; at all changes in grade, size, and direction of more than 45 degrees; and at distances of not more than 100 feet along sewers. (9) A campground owner shall ensure that all sewers which are 10 inches in diameter or larger have manholes located at all changes in grade, size, and direction and at distances of not more than 400 feet along sewers. A campground owner shall ensure that a flow channel through a manhole conforms to the slope and shape of the sanitary sewers. (10) A person designing the campground sewage system shall specify leakage tests for the proposed construction of sanitary sewers. (11) A campground owner shall ensure that a sanitary sewer or individual sewer service line is not laid within 10 feet horizontally of a waterline. (12) If a sanitary sewer line crosses a waterline, then a campground owner shall ensure that there is a minimum of 12 inches of clear vertical isolation between the sewer line and the waterline. If it is not feasible to have a minimum of 12 inches of vertical isolation, then a campground owner shall ensure that the sanitary sewer line is encased in concrete for 5 feet on each side of the crossing. A campground owner shall ensure that 1 full length of waterline is centered over the sewer crossing.