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On-Site Disposal Systems Policy ~2 of MC's "Water Resources Management Wastewater Treatment and Handling Policy Plan" states: "On site sewage disposal systems are appropriate to serve single family residences at development densities of four units per 40 acres or less, if governments plan for them and adopt a management and control system consistent with federal and state laws and Metropolitan Council Guidelines" The policy statement does not reflect any consideration for the intrinsic suitability of soils for septic systems (e.g. clay vs sandy soils). Figure 3 illustrates the typical septic system required for a typical four bedroom house. The standard land area required for a primary on site system and an alternate system is approximately 10,000 square feet or 11% of a 2.5 acre lot. CITY OF RAMSEY ON-SITE SYSTEM F~AI~AGE~NT PROGRAM The City of Ramsey on-site sewage treatment regulations are addressed in Ramsey City Code Chapter.150.1 (Sewage Disposal Systems), Ramsey Zoning Ordinance Chapter !70.12 (Subdivision), and Chapter 170.13 (Soils). The regulations are modeled in technical content after Minnesota Rules 7080 (Individual Sewage Treatment Systems Standards). Installation of a new or replacement septic system requires a pe_~mit and inspection by the Ramsey Plumbing Inspector who is certi- 'lied by MPCA. The plumbing inspector maintains records of site evaluations and designs of new septic systems where site evaluations are required. Certain areas in Ramsey are known to have Class I soils; site evaluations are not required in these areas (see map of unsuitable areas). However, mandatory site evaluation for new and replacement on-site sewage treatment systems is under consideration by the City at this time. The City Code requires that the inspector or homeowners measure scum level in septic tanks every two years. The city does info~m homeowners of the need for septic tank pumping main- tenance by p~blication in local media once a year. The city inspects and cites failed septic systems. However, septic system failures are usually reported by homeowners or neighbors who live near the failed system. The city requires licenses for site eva!uators septic system installers and pumpers. Site evaluators must be certified by the MPCA voluntary certification program. Beginning January 1989, installers must also be certified by the MPCA.