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Westwood Wellen Associates W Westwood Professional Services, Inc. <br /> 3701 12th Street North <br /> Suite 206 <br /> St.Cloud,MN 56303 <br /> Phone:320-253-9495 <br /> June 8, 2000 Fax-320-253.8737 <br /> Toll free:1-800-270.9495 <br /> Email:wps@westwoodps.com <br /> Thomas Graham <br /> 1065 Tamarack Drive <br /> Orono, MN 55356 <br /> RE: Septic System Site Plan for Lot 3, Block 1, UNDERHILL FARMS, Hennepen County. <br /> Dear Thomas: <br /> This proposed on-site septic system was designed for a 4 bedroom home with an estimated flow of 600 <br /> gallons per day. Due to mottled soils at a depth of 12" in the septic site area,the system will need to be <br /> a mound system with 24"of sand under the rockbed at the upslope side. The site in which this system is <br /> proposed has a average existing ground slope of 10%and percolation rates ranging from 17.1-24.7 MPI. <br /> The rock bed size will be 10 feet wide and 50 feet long with the overall dimensions of the mound being <br /> 70 feet long and 37.8 feet wide. Two 1000 gallon septic tanks and a 1000 gallon pump tank will be <br /> required for this septic system. <br /> Based on our evaluation there is adequate room on the property for a alternate septic site. The alternate <br /> septic system also is shown and designed. This septic site will also need to be a mound, it can be used in <br /> the event of the primary mound failing <br /> Certain precautions will need to be made to protect the area in which the above referenced septic <br /> systems are proposed. It is critical that the soil is not disturbed before, during,and after construction of <br /> the system. The septic area should be staked off with visible fencing prior to construction. <br /> This system should treat the septic effluent effectively if the system is installed properly and is <br /> maintained properly. It is recommenced that the septic tanks be pumped every two years. This will <br /> reduce the chance of solids reaching the mound system. It is also recommended not to use excessive <br /> amounts of chlorine, soaps,and anti-bacterial products which can kill bacteria in the septic tanks,thus <br /> causing the system to fail.This bacteria is needed to treat the septic effluent. <br /> If you have any questions in regards to this design, I will be happy to answer them. I can be reached at <br /> (612)682-2587. <br /> Sincerely, <br /> X Z-Zill—V14 <br /> Bernie Miller <br /> Septic Site Designer <br /> MPCA Lic.No. 43 <br /> hc°ti(Jiun0 Ihr lutuir 10day 111(4, 19i;' <br />