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system, which is minimum of (see pump sheet) 22 - foot head. <br />The quantity of effluent delivered each pump cycle should be at least 230 gallons, but no more <br />than 260 gallons per cycle. <br />The amount of effluent pumped per cycle depends on the surface area of tlie pumping tank and <br />the setting of the pump start and stop. A relatively large pumping tank surface area is needed <br />with a small pump out depth. <br />There are several pumping situations that can be used with this on-site sewage treatment system. <br />These situations should be in concurrence with the City Ordinance and the conuactor installing <br />the system. <br />A vertical inspection pipe at least 1 1/2 inches in diameter to the bottom shall be installed in the <br />rock layer of the mound. The inspection pipe shall be located at an end opposite from where the <br />sewage tank effluent enters the rock layer. The inspection pipe shall have 3/8 inch, or larger, <br />perforations spaced vertically no more th’n 6 inches apart. At least 2 perforations shall be <br />located in the rock layer. The inspeclioii n‘ -shall e.xtend to the bottom of the rock layer with <br />an elbow beneath it and shall be capped flush with or above the finished grade. <br />Set Back Requiremenfs <br />for the mound and tanks: <br />property line 20’ <br />house 20' <br />well 75 ’ <br />wetland 75' <br />driveway 10 ’