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' � ' MOUND DESIGN WORKSHEET
<br /> � , (For Flows up to 1200 gpd) . - ,
<br /> A. '�.,OW F.rtimated Sewsie Flows in Gallons per day
<br /> � ;- ESt1TYl1t� �Ul� �Cl N�m�ber 1ype1 1ypeII 1ypeIIl
<br /> or measured x 1:5= gpd. - - � � �
<br /> ` z 30o ns ,so �,
<br /> B. SEPTIC TANK LIQUID VOLUMES a `60500 3n°s° 2is6 °�'"�
<br /> �
<br /> ���� gallons . 6 9 0 °su �i T m�
<br /> � ioso 600 �o �`«
<br /> ' 8 1200 675 406 �p
<br /> C. SOILS (refer to site evaluation) J °°''�°`
<br /> 1. Depth to restricting layer= a� inches�, � feet �`a'`'�"'`�'��'°�"°°`>
<br /> 2. Depth of percolation tests= I�. inches, : N�or ���►q�� uqwa���y,��n
<br /> 3. Texture �a�, _ Percolation rate�mpi �`°°'� �°�"r s�s��_�
<br /> f..
<br /> � ��,.,_ ,,. z or t«. 7so 112s
<br /> 4. Land slope /� % saa i000 isao
<br /> . S or 6 1300 2250
<br /> 7,8 or 9 2000 3000
<br /> D. R K LAYER
<br /> 1. Multiply flow rate by 0.83 to obtain required areaYof rock layer: A x 0.83 =
<br /> �_gpd x 0.83 sq:ft./gpd = 'Uv sq: ft. .
<br /> 2. Select width of rock layer(max 10' if<120 mpi max 5') = l v ft.
<br /> 3. Length of rock layer= area+width._
<br /> S�� sq. ft'� �rL�ft. = s�ft:� '"+�
<br /> ,Wi.. �:� . ��;�
<br /> � <12�p� L,ength ��. ft.
<br /> � >12(�mpi <5'
<br /> E. ROCK VOLUME .,.. ,:
<br /> 1. Multiply rock azea by rock depth to get cubic feet of rock;s�� sq, ft, x i.��
<br /> ft. - '`s�r cu.�ft.
<br /> 2. Divide cu. ft.by 27 cu.�t.7cu.yd. to get cubic yards;
<br /> �cu. f# +'27 � � cu �,
<br /> 3. Multi 1 cubic ards b 1:4 to' ' t w ` �' ��`�'�
<br /> ,�e ,c►�' �s, cu.yd. x 1.4
<br /> P Y ��' Y , , ��v�, a� �,���, --�:
<br /> ton/cu:yd. _� .� fions �„�:
<br /> a ,
<br /> ,
<br /> F. ABSORPTION WI�TH ` 3k��, 'n�;-� `�wwm smo��e
<br /> 1. Percolation rate in top 12 inches of soil is� ,�I'�piz�i��, ��,,a��,� �„�, ���
<br /> Texture Lv 9ro, , �;: ..��per� s�u T� �a.rpa ,�a�w x�
<br /> . . ��� , .(MP[) . tquae faot ►.ay«w'�th
<br /> �',.: .��.'� t idL °i�'�'''l�✓b�a� r. ��M�.1 C.O�I70.tifOd 1.� 1.�
<br /> ` � ' �I t4 S'';" S�ud 1.20 1.00
<br /> 2. Select allowable so�l loacl�t ra��f�om t�ble, ~d; �a��°'�`� � 1 m s �.s.m o.�o Z.00
<br /> 8. s� , �,3�.`. . �. �fo ls s.oayl.o�m oJs ts2
<br /> ,,,�„� ���'`�'�` c�.�, ����'� , '��z�° •'��. �0�i � I.aao� � � 0.60 i00
<br /> ' , � -- : i r �'� "i r� �Q�13"i 'SIIL 1.0�m 0.30 2.40
<br /> " � y r�'s�';��!''�.�.',c •' ` WYLam 0.45 2.67
<br /> ' +,���, +��:° �� �: ,� � i�D Clay O.Ta 3.00
<br /> 3. CalCulate adls�'�t1�th��pti � Y�I d�a t3o c��y o.zo 6.ao
<br /> ,.,� .
<br /> . .. ar �' '��r:,� • ... . .
<br /> �. •� '�'�. �` ,�f'4v r: �r p �, .; .,
<br /> loadin rate`of 1:20; d ° �� '�`�� ' " �� r
<br /> g $p /�t2by allow�ble.soil t�;`��
<br /> 1.20 gpd%ft2+ ��� ��;� ��� � ,��. :A-�" .
<br /> � t ta� � n�,.
<br /> ..� ' ';; °' `G., t ,,�^'�i{ ,� '�"`�'}cnK ..
<br /> ' �ie� '�;- , s '', :� .1:-r ,� T t -wv v�ti'3� ...
<br /> 4. Multiply adsorption width ratio by roc'k lay�'w�d��i�'i''get`�.
<br /> required adsorption v�ndth, � '' ':, ��
<br /> .���h.,
<br /> � � 4,��'F tiN'�' d�i'Ira �� �4 k�.�..��nQ` �� �t5"dt r
<br /> . r �Y�hAr� �.«,� .�,�.ed,+Y�i�'.�lydw�;� � �.�:J.�:rr..+r..,}�.. . . ,
<br />
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