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IV. DESIGN <br /> A. Tank Size: <br /> 1. One- and Two-family Dwellings. The minimum liquid capacity of a holding tank for one- and two- <br /> family dwelling applications shall not be less than 2000 gallons or 5 times the estimated daily <br /> wastewater flow determined in accordance with s. SPS 383.43(3), (4), or (5), Wis. Adm. Code, <br /> whichever is greater. <br /> 2. Public Facilities. The minimum liquid capacity of a holding tank for public facilities shall not be less <br /> than 2000 gallons or 5 times the estimated daily wastewater flow determined in accordance with s. SPS <br /> 383.43(6), Wis. Adm. Code or Table 3 whichever is greater. Estimated flows for facilities not listed in <br /> Table 3 shall be provided pursuant to s. SPS 383.43(6), Wis. Adm. Code. <br /> B. Tank Anchoring: <br /> When a holding tank may be installed in saturated soils (see ch. SPS 385, Wis. Adm. Code, for <br /> information on how to determine soil saturation) and/or in an area that is considered part of a 100 year <br /> flood plain, the tank shall meet the provisions of s. SPS 383.43(8)(g), Wis. Adm. Code. <br /> See chapter SPS 383, Wis. Adm. Code, Appendix for examples of anchoring calculations. <br /> C. Monitoring/Management Equipment: <br /> The alarm for the holding tank installation is an audible and/or visual alarm installed in a conspicuous <br /> location in or on the building served or on a post near the tank. The alarm is connected to a float switch <br /> or other electrical sensor in the holding tank. The maximum alarm on level is set at 12 inches below the <br /> tank inlet when only one tank is used or 90% of the total volume of the tankage when more than one <br /> tank is used. <br /> V. SITE PREPARATION AND CONSTRUCTION <br /> A. Sanitary Permit: <br /> Prior to the construction of the system, a state sanitary permit shall be obtained and posted in a clearly <br /> visible location on the site. Arrangements for inspection(s) must be made with the governmental unit <br /> that issues the state sanitary permit. When a POWTS is located or will be located on property owned by <br /> the state, the sanitary permit shall be obtained from the department. Arrangements for inspection(s) <br /> shall be made with the department. <br /> B. Site Preparation and Tank Installation: <br /> The holding tank must be installed in accordance with the manufacturer's printed instructions, product <br /> approval, plan approval and specifications in this component manual. If there is a conflict between the <br /> manufacturer's instructions and the product approval, plan approval and/or component manual <br /> specifications, the product approval, plan approval and/or component manual specifications take <br /> precedence. <br /> 1. The tank shall be set level. (Refer to tank manufacturer's recommendations for bedding and backfill <br /> listed in tank approval letter.) <br /> 2. Access openings that terminate at grade and/or less than 2 feet above the established regional flood <br /> elevation (if applicable) must have watertight access openings. Access openings that terminate at least <br /> 4 inches above the surrounding grade and 2 feet above the established regional flood elevation (if <br /> applicable) are not required to have watertight access openings. <br /> 5 of 13 HOLDING TANK COMPONENT MANUAL (ver. 2.0) <br />