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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 Cc�l'@fUllJ/
<br /> in the mound and the barrier layer such as saturated soil conditions C011St1'UCt@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 /> �v�,...�:�_: LATERALS
<br /> ,�,.� . �... .. .:--
<br /> SANOY LOAM SOIL �� �' r• , .��'_; -►;.'::;;'.." '.:�,�,i• .
<br /> ��• � •�!�h,���•
<br /> �•�t' ,� '••1 / �j•.�',._
<br /> � ; '�M •/ 1'J�•
<br /> � ' ' / �j�!
<br /> LAYER OF GEOTEXTILE ..,.r� .�-�� �';.;"' f �. ��'
<br /> FABRIC OR 4 INCHES OF ' ;/�,:: i��� y ;;�
<br /> HAY COVEREO BY � I ►'
<br /> BUILOING PAPER ;:�' �� � / Xy �� ''
<br /> r.: a7
<br /> I �/ OR 2" %r�` �, ��� � �� �
<br /> 2� ,..�:��' • . � .
<br /> PIPE FROM PUMP�'`;,,;'.•' ��'�i,��:•' � ,yr
<br /> ,' f�
<br /> �'�� �� ,:i-/, , �� �,
<br /> 3� "_21� .�1, �� ,�/ /.�� ' _„�` �� :/
<br /> CL�AN F�OCK .� ' f i•'� ,�'� � j" � DIVERSION FOR
<br /> ��''� '� j••; ��� �.r� SURFACE WATER
<br /> 6" TOPSOIL� ��� , �, � *
<br /> ..,. � •� �'' .;� �r; /
<br /> _.Q���.:::'��- J�� /�� 3- //�, t7�i
<br /> }+ s.' �..
<br /> -��� �:�' r 9„/..i, MQx I •��,'
<br /> •_� �/ � ` :l �,21j . �Y�.{.
<br /> '' e .� � ' -•J .•. :;• ,. :. .�..,:��,�
<br /> ' `C S�Qp , •.;��: '��y;..,;,:`.'•;:,::K����•
<br /> L�q E . ��`_' ..�..�. .�,.,.�.�.,,.
<br /> q -. : y�:.
<br /> S rup N �` �' „ �'L,,yitir.!;+,r:`ti,.
<br /> F�l` e�� � ' • _3�6 r1.��i;'j';.Y�:`:.
<br /> ROKFNAY UR ��."�,._ . �., `�; . �
<br /> p ' _•�'��.,� ��.
<br /> B NAT .. �- _
<br /> ARR�FRR`qY,,,.;:-�,-::-'.
<br /> FR
<br /> Figure E-6
<br />
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