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-3- factor, I used more of a weighted average and that gave a slightly larger design system than the one actually required. Area is designed much less than the lower numbers/minutes (faster rate of percolation). --Eder - two weeks ago I asked you about health and safety, and you said there'd be no particular problems. What about the nitrates and phosphates getting; into the water table? --Bohrer - the distance from the water table and adjacent wells would guarantee that these nitrates, effluents, etc. are filtered out before it comes near the water table or adjacent wells. --Bohrer sketched alternate and proposed systems on chalkboard as Mottaz requested, i.e. septic system/pumping station/drop boxes/drainfields. --Mottaz - we know from experience there's going to be trouble because I believe almost every system in this area has had problems. Hard clay prevalent in area. Also, our ordinance requires two separate sites; how can we consider this as two separate sites? If soil causes problem, can't see how going 1' away and putting in another pipe can solve problems and fulfill ordinance requirements. Could you have systems further apart? (Rohrer - not without making other variances more severe, like moving house closer to lake, etc.) --Whittaker - couldn't you compress one system and put other one in another place, set up by interspersing the lines? (Rohrer - no, it's a matter of construction, such as backhoe tires would sit over one trench.) --Bohrer - it's true this system has not been used in Lake Elmo; talked to Lyle Doerr of Washington and he has no problem with this type system. --Eder - also talked to Doerr, and he has no problem from a technical standpoint. Mike Hansel of PCA, strong proponent to get a more uniform code, says it's minimum code. Also noted in Resource Enaineerinq is that no one knows when system will fail and that clay material is only material that will stop nitrates and phosphates from going into water table. If all perc rates are as high as they are, there'll be problems. --Bohrer - the lowest drainfield run would be one of the alternate runs at 941 elevation; 100-year flood elevation is 931. --Novak - is this house closer to high water mark than other homes in area? (Bohrer - don't believe we've measured the rest of them.) --Eder read Code Book wordage - "all lots must have at least 1 acre of land suitable for septic drainfields in an area sufficient for 2 drain - field sites." --Eder asked those present in the J.L. Cohn Subdivision if anyone had wells shallower than 1251: Marlene Paulsrud, Lot 7 - 86' Stephen Butzer, Lots 1 and 2 - 100' Betsy Bonestrou, Lot 6 - will call if less Wells less than 50' become very questionable. --Eder - can we require, because of concern over nitrates and phosphates, that the system when constructed be inspected when the trenches are open, that it have an as -built plan, that this property owner or any other subsequent owner hold this City harmless from any requirement that the property be sewered prematurely because of this system? --Bohrer - I have no problem with the first part, i.e. conditions are reasonably related to protecting public health. Second part should be put on record so any subsequent purchaser would be on notice as to City's view on it. --Marshal, Attorney - Code book doesn't say you have to put two systems side by side to use the maximum amount of real estate. I think it's possible ordinance was drafted to anticipate all the sophisticated and very technical systems that are being developed. I would think that the systems as proposed comply with the ordinance, provided that there are no other engineering and technical problems related to the public health. --Eder - the burden we have is to assure citizens the guarantee of public health; however, this system cannot assure that. Need strict requirements.