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E-6 <br /> Part 2: Mound Systems <br /> A sewage treatment mound is a seepage bed elevated by clean sand Mounds must be <br /> fill to provide an adequate separation distance between the rock layer carefully <br /> in the mound and the barrier layer such as saturated soil conditions constructed <br /> or bedrock. The mound must be carefully constructed to provide <br /> adequate sewage treatment. <br /> Mound failures have usually been traced to improper construction <br /> practices. <br /> PERFORATED <br /> �,�,. . LATERALS <br /> SANDY LOAM SOIL !jam, ,: ,, *"%� -a✓i.i;: <br /> /'•,Y `0. ^ <br /> /.•s' ', i••• •�/0 , ./ y /• <br /> /LAYER OF GEOTEXTILE �./), '//' <br /> :lf <br /> HAY COVERED BY / . <br /> BUILDING PAPER I." / x' 7 '' <br /> ., 7 <br /> / <br /> PIPE FROM PUMP -`;!..••,•1:'.r." /le.' <br /> F�V� '' �'•' ' . , <br /> J. <br /> j• . <br /> 3/ "-2?2" ,,/ • i , :' . +---!. Ph4/ ./ <br /> CLAN TOCK -.j'"'. i• <br /> �. • a DIVERSION FOR <br /> j , .� /j / / SURFACE WATER <br /> 6" TOPSOIL ,/,/ <br /> •••" - 7 <br /> ' Zr <br /> J..., .A1(/// 0 <br /> +' a' , / 3 ..l, <br /> QND FILL SOD. 36" '''i ;"' �y: '•. <br /> BROkLNAY UR z1; �''';;:;�,: <br /> BARRIERR`qY• �..:'- <br /> FR • <br /> Figure E-6 <br />