Laserfiche WebLink
� MOUND DESIGN WORKSHEET <br /> � ' (For Flows up to 1200 gpd) <br /> enia�end s�r+s�Flow+in c,.U«s,per a <br /> A. L'�+OW � <br /> Fstimated �?=gpd r'� �cy�'' �`�'n �m � <br /> or measured.=x 1.5 =.=:_BPd. <br /> 9 s �oo ns ►ao �,, <br /> � � �so �o0 2ia am <br /> B. SEPTIC TANK LIQUID VOLUIviF.S s � ;'� � � <br /> / - �a�� � 1-/oo v gallOns . i ; io�so 6�0o rmio T�°; <br /> I e i �soo a�s '°° �m+ <br /> C. SOILS (ref er to site evaluation) � <br /> 1. Depth to restricting layer=�u''�=inches=feet �'°'* <br /> n.�ew d Mw...t+�+a u�+�w�n� -""� <br /> I�- "�` Lt1C�'lPS �•a�• c�r wa++a�►� <br /> 2. Depth of percolation tests= � <br /> �.o a�Y� Percolation rate ia.u mpi '�=" � "° ,� <br /> 3. Texture .� <br /> 4. Land slope S % ,'�~r � � <br /> D. R K LA ,D I <br /> 1, Iviultiply flow rate by 0.83 to obtain requiz'ed area of rock layer. A x 0.83 = <br /> �=gpd x 0.83 sq. ft./gpd = ���� , sq. ft. <br /> 2. Select width of roc�c layer (max 10' if <120 mpi max 5') = =�• <br /> 3. Length of rock layer� area +width - '� » .» . „' <br /> -�• ..�.. �� �.�,�'�i , <br /> � �sq. ft. + _ �1=_ft. _ ;<� �.. d. .. � „b , <br /> , <br /> �dth=ft � � <br /> � <120mpi <10' �n�—�-z—fr <br /> >120mpi t5' <br /> E. ROCFC uOLtTNiE <br /> 1. Multiply rock area by rock dept� to get cubic feet oE rock; �J sq. ft x i�� <br /> ft. _�.�cu. ft. <br /> 2. Divide cu. ft.by 27 cu• ft/cu. yd. to get cubic yards; <br /> �cu. ft. +27 =�,cu. yd. <br /> 3. Multiply rubic yards by 1.4 to get weight oE rock in tons; cu. yd. x 1.4 <br /> ton/cu. yd. _ ,� tons. <br /> F. ABSORPTTON WIDTH ADsorpdon VY�dth SL�'IYDIe <br /> 1, Percolation rate in top 12 inches of soil,is � y mpi ���� ��T�� �� �� <br /> Texture �`—�`� t..oX�wt cM� �.� t,.�w <br /> Pwet�0.1 Cat„Sasd 1.20 I,00 <br /> ar a s s.°a i.�o i.00 <br /> 2, Select allowable soil loadin rate from table; a�ps R'°��°d o.60 20° <br /> g 6 a IS SaeQr t.eae 0.19 1.32 <br /> .�!s $pd/� � �i w��°s s,� o:o i� <br /> ,16 p 6p phr bo�m QAS 167 <br /> 3. Calculate adsorption width ratio by dividing rock layer �'°"'°'�r120 `�" °�0 a'0C <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; <br /> 1.20 gpd/ft�+ •, `��' gpd/f�_ .L�.�;�i <br /> q;. . M,ultiPly adsorption width ratio by rock layer width to get <br /> required adsorption width; <br /> a.�� x /_�^ ��..�� h <br />