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Mr. James Browniee <br />September 23, 1987 <br />Page Three <br />The pump should be rigged with mercury float switches to dose about <br />150 gallons of effluent to the mound. An additional mercury float <br />switch should be installed on a separate circuit to an alarm device <br />to warn of pump failure. The mercury switches should be rigged to <br />allow 600 gallons reserve capacity in the pumping chamber. All <br />electrical connections should be watertight. <br />The existing septic tank(s) should be checked for soundness (intact <br />baffles; watertight) and capacity (1000 gallons each). If <br />necessary the tank(s) should be repaired or replaced. The City of <br />Orono re<iuir<:« two septic tanks hooked in series. The pumping <br />chamber sh i ' have at least 1250 gallons capacity. <br />It is recommended that a water meter be installed to monitor water <br />use. The meter should be hooked to the water system such that <br />exterior sillcocks are excluded. The water meter should be read <br />periodically to ensure that the design capacity of the septic <br />system is not exceeded. <br />It is highly recommended that the installer of this septic system <br />holds an Individual Sewage Treatment Systems Certificate for <br />installation issued by the Minnesota Pollution Control Agency. <br />The sole purpose of soils data contained herein is evaluation of <br />soil suitability for on-site absorption of septic tank effluent at <br />the test site. <br />If you have any questions about information contained in this <br />report, please feel free to contact me. <br />Sincerely, <br />HAKANSON ANDERSON ASSOCIATES, INC. <br />Gary j/jtJ^athbun, Soil Scientist <br />/mlc <br />Enclosures <br />File; 1704.01