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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'1Pefll//)/
<br /> in the mound and the barrier layer such as saturated soil conditions COI7SfPUCt@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 /> �,�..,,..,� LATERALS
<br /> ,,,, �•,�... -—:;--
<br /> Ij' . ._,�� ._" •, .. _ .. .
<br /> SANOY �OAM $OIL �' ,' ,.y�_ •,.._':,,;; ;,::;��;'- .
<br /> �� i� � ���.�.(� �• �/, ^;J;.
<br /> i• ,i�
<br /> , , �?,:'
<br /> LAYER OF GEOTEXTILE ;�' ���' •���, � '
<br /> FABRIC OR 4 INCHES OF •'•��`�;:'�' , ,�,; i,�,y { '. ��.
<br /> HAY COVEREO BY � .-
<br /> BUI�DING PAPER ;�'� .' ��� � / X� � ''�+
<br /> ��.�
<br /> I '/ " 0 R 2" '`'� �� '''!�i �'� r°�
<br /> PIPE �'ROM PUMP�'•`:�•:,i•"f'j.�-,. //•,. �_�,�' . � „� y�
<br /> .
<br /> �, i� � S
<br /> r,. //� V�, � ,r' �i
<br /> ��,
<br /> 3/ "-21� �� ,// /'�� /''.."" )'� :�
<br /> CLE�AN F�OCK ���'�f� ;,/•' ,,'� i' � DIVERSION FOR
<br /> ' �� ' , ,��' � � .I� SURFACE WATER
<br /> 6" TOPSOIL� � � , � � *J
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<br /> ��`` -�``-� ��� -�.�9"/� t� "'Ax, � .��
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<br /> Qrup F ".` 36„ 1��r;+.,_...::�_,
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<br /> BRpkENAY UR �; y$��,:���
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<br /> BqRRAeRRiqY� ,.:'_�•:�'•-
<br /> fR
<br /> Figure E-6
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