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From:Roger Peitso <br />To:Jeremy Barnhart <br />Cc:Melanie Curtis <br />Subject:RE: 4780 North Arm Septic system <br />Date:Tuesday, September 22, 2020 4:58:46 PM <br />Melanie, <br /> <br />The septic system that is being installed is called a Type IV system. A Type I system is a standard or a <br />normal system. They are the same in that they both use a septic tanks for settling out the solids and <br />they both have a drain field used for dispersal and treatment of the effluent. <br /> <br />The Type IV system is using pre-treatment technology for the affluent. It is a way to get “credit” in <br />the design process so the drainfield can be constructed smaller or lower to grade than a Type I <br />system. The designer felt this was necessary due to the restricted space available on the lot. The pre- <br />treatment system is called and Eco-Pod. It has filter media inside of a 500 gallon tank. <br /> <br />Another benefit of using this Eco-Pod is it starts the aerobic treatment process of the affluent before <br />getting to the drainfield. Then the drainfield does not need to work as hard during the treatment <br />process as a Type I system would. This can help with the longevity of the drainfield. <br /> <br />A drawback is that there is more maintenance needed for a Type IV system. The tanks need to be <br />checked every 6 months and may need to be pumped more often that every 3 years. The frequency <br />is based on the inspections and how much use the system gets. <br /> <br />It this enough information? <br /> <br />Thanks, <br /> <br />Roger <br /> <br /> <br />From: Jeremy Barnhart <br />Sent: Monday, September 21, 2020 8:03 PM <br />To: Roger Peitso <rpeitso@ci.orono.mn.us> <br />Cc: Melanie Curtis <MCurtis@ci.orono.mn.us> <br />Subject: 4780 North Arm <br /> <br />Give Melanie a memo outlining the maintenance requirements of the designed septic system on this <br />lot, please.