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Andrew Mack <br /> From: Tom Wolfe [TWolfe@thexton.com] <br /> Sent: Wednesday, July 02, 2014 4:12 PM <br /> To: Andrew Mack <br /> Subject: RE: 520 Big Island Septic System Managment Plan Agreement <br /> Ok.Thanks. I will get over to city hall to sign the document ASAP. <br /> Tom Wolfe �;� <br /> Thexton Mfg Co Inc. <br /> 6539 Cecilia Circle <br /> Edina, MN 55439 <br /> PH: 952-831-4171 ext.116 <br /> FAX: 952-831-5938 <br /> E-Mail:twolfe@thexton.com <br /> From: Andrew Mack [mailto:amack@ci.orono.mn.us] <br /> Sent: Wednesday, July 02, 2014 2:30 PM <br /> To: Tom Wolfe <br /> Cc: 'Peter Peterson' <br /> Subject: RE: 520 Big Island Septic System Managment Plan Agreement <br /> Tom, <br /> Actually there is a difference between the total tank capacity and the operating tank level. The operating level involves a <br /> measurement at the tank outlet which is actually lower than the tank inlet. These inlet/outlet pipes are protected by a <br /> shield called a baffle which helps keep solids from exiting the outlet and protects both the drain field and pump, if one <br /> exists as part of the system. <br /> With this brief explanation, the operating level then becomes a measurement of inches from the bottom of the tank to the <br /> outlet baffle. If anything gets plugged from this point outward, then the tank will continue to fill beyond the operating level <br /> up to the total tank capacity and then back up into the house, unless iYs caught in time. If a pump tank exists then it <br /> usually involves a pump failure which triggers an alarm. When the alarm goes off it is the remaining volume of effluent <br /> available between the operating an total tank volume that gives you a little time to call for helpl <br /> I hope this helps. <br /> If there are no other changes beyond the pumper's comments, then I will print 2 copies of the document for both our <br /> signatures and have it available with Monica up front here at city hall for you to stop by and sign at your convenience. <br /> f��L��,�f: Andrew Mack, AICP <br /> t � , Community Development Director <br /> �, � � Direct 952.249.4626 <br /> �,S� �s�, �/ amack(iilci.orono.mn.us <br /> �% <br /> www.ci.orono.mn.us <br /> From: Tom Wolfe [mailto:TWolfe@thexton.com] <br /> Sent: Wednesday, July 02, 2014 2:10 PM <br /> To: Andrew Mack <br /> Subject: RE: 520 Big Island Septic System Managment Plan Agreement <br /> Hello Andrew: <br /> I read over the attached document.The only question I had was the following statement in the action plan: <br /> "If the operating levels in the tank are below 50%a of the design operating levels of the septic tank(s)" <br /> 1 <br />