Agenda - Council - 12/28/2006 - Laserfiche WebLink

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Chairperson Nixt indicated the overall site plan will not change substantially as a result of the findings that maybe obtained from additional soils testing. Mr. Walz stated they have been given the requirement to do additional testing to dig one 8-foot test pit for every 10,000 square feet of septic system. The proposed septic system is only 2,400 square feet; the total square footage would be less than 10,000 square feet, so essentially. they only need do to one test. He stated they have done eight test pits throughout the two different properties to determine the best site for the septic system. Chairperson Nixt asked if the testing was done through a qualified and certified subcontractor who was approved to make the soil assessments. Mr. Walz replied he had received notification on Wednesday evening that they needed a report submitted within 72 hours. He contacted a licensed soil scientist. This individual, the septic designer and himself conducted the test as a team with a backhoe. Commissioner Van Scoy asked if the report meets $ie requirements of the Engineering Department to make a determination regarding the septic system. City Engineer Jankowski explained the report includes the results of the soil test; there are no septic designs attached to the report. Associate Planner Dalnes indicated the report states that the results are inconclusive and that more testing needs to be done for verification. The report does not stand by the assertion that this soil will 100% support a septic system; the report calls for more testing. Chairperson Nixt noted if the soil is not acceptable for a conventional system there are other types of system designs, but they would drive the cost up considerably. Mr. Vick Hagenah, Septic System Designer, described the location and results of soil borings and test pits He thinks the soil is very sound in this location. He walked the whole area and didn't see anything really disruptive. Chairperson Nixt requested an estimate of the size of drain field that would be needed. Associate Planner Dalnes indicated she has talked to Steve Lutmer and Mike McDowell about the drain field. Mr. Lutmer uses the U of M estimated flow rate chart. The sizing estimated by Mr. Hagenah is pretty cld to the estimated number of employee 2,200 possibility of more employees bemg adde square feet would be a good estimate for the size of the drain field. Chairperson Nixt asked how many square feet are available to locate the 2,200 square foot estimated drain field and Associate Planner Dalnes replied approximately one acre. Chairperson Nixt indicated he would not hold the approval up with 50,000 square feet of available space to site a 2,200 square foot drain field. This issue clearly needs to be -275-