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<br /> 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 CarefV/ly
<br /> in the mound and the barrier layer such as saturated soil conditions C011StrUCt@d
<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 /> �,�,.,,.:.1 LATERALS
<br /> �.�,�. . :.�� = --�• ..... _ .
<br /> SANDY LOAM SOIL ;' �':�• �` •'""`^''M;-:;�:�:.i' ,
<br /> ./ ��. .;�
<br /> �`•'t/ � i'•��r'•/ ,yy�
<br /> LAYER OF GEOTEXTILE ..,.�� .� ' � t�' f •i`
<br /> FABRIC OR 4 INCHES OF ' ��r'��,�� " �.� ���
<br /> HAY COVERED BY � .
<br /> BUI�DING PAPER %�` ,.' ,.� / X' � ''
<br /> I '/ " OR 2" ,.,�.f`� � ''��� /' �'� �
<br /> z� • i � j
<br /> PIPE FROM PUMP� .';�.:'.•' � ��.��i.j"�� , � jy'
<br /> Y �'� /� AY j/�, I � // ��
<br /> 'i /� `
<br /> ■
<br /> 3� ~-�I� ..?f' /, ��� �.�' �� �R`y >� ��
<br /> CL�AN F�OCK ' � . /�i•'� ,�'� � ji' � OIVERSION FOR
<br /> 6" TOPSOIL� � % • "�" � ��, /,,✓� *��, SURFACE WATER
<br /> .r ,,. �' �, r
<br /> -.Q„��`s�:;:;i��. j'� i� 1`�!' //'.✓, j7/,.r
<br /> ,, '° �, ,.:� 3 d�
<br /> ,,, . . , t ;.
<br /> ��`�- -�``� '�� -�.�9"/� {: "'Qx, i :.�.�
<br /> • '� % , �`t ' ..J L.?�•.. .•. . r .. �,�,�f:.w��f•
<br /> ..`C� ��Opc �� ...i:: • .•:j�:'`,�::.'• y�,.K,�{.".���.
<br /> �:.
<br /> S EqN ` . �'. ,.-.` •-�.�:'�;�:��::�,.r.,..
<br /> QNp •� 3 „ � r•�r.t:•.*•:�M1:.
<br /> F��� SOp � �6 ri..;,-�;,•�:�.:
<br /> 9RpkFNAY U� . � . ,:<;.:t��;��;
<br /> P �' �`��'�;-:=...,��`�*-..
<br /> BqRRQFR •
<br /> UR`� ;.;_,.:' . -
<br /> AYFR
<br /> Figure E-6
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