Laserfiche WebLink
MOUND DESIGN WOKKSHEET <br /> � � (For Flows up to 1200 gpd) <br /> F.sdavted Sawii.Flarn ln G�llau per ay <br /> A. FLOW .� <br /> Estimated (n�._gpd r,� ,y�� �u �m <br /> or measured,=x 1.5 ==SPd. <br /> s �oo us iao <br /> � �sp �00 216 �� <br /> B, SEPTIC TANK I-IQUID VOLUMFrS <br /> 4 600 375 nlua <br /> a. — �d d� g�OILS . 7 IOJO 600 770 Tp � <br /> ! 6 i 1200 6�3 � m <br /> , � ed�+cn <br /> C. SOILS (refer to site evaluadon) ,� , , <br /> ` � -,�,�. <br /> � �d 3o inches feet "�°°'"` <br /> 1, Depth to restricting layer= aT` r,.m.,,� ,�,..� ��� -+�;�,� <br /> 2. Depth of percolation tests = .�.��� _��� "°'°°°" `"'�' `'�"� <br /> G�R�{ �—ox�� Percolation rate � -.�mpi ��~ 10�00 i� � <br /> 3. Texture ,��;�, ;� � i� <br /> 4. Land slope___.�—..% <br /> D. ROCK I.AYER.D I N <br /> 1. Mvltiply flow rate by 0.83 to obtain required area of rock layer. A x 0.83 = <br /> d o gpd x 0.83 sq. ft./gpd = �sq. ft: <br /> 2, Select width of rock layer (max �0' if<120 mpi max 5') _ =�• <br /> 3. L en g t h o f r o c k l a y e r� a�cea+width= � " ."s�.�." <br /> .� . , -� <br /> . ,. <br /> � y� � sq. ft. + .12_.�• _�� ft' b• r .�.�,�,�,.b ,: <br /> , , <br /> Width �D ft � ; <br /> � <120mpi <10' Length � _ft <br /> >120mpi <5' <br /> E. ROCK VOLLJME <br /> �. Multiply rock area by rock depth to get cubic feet of rock;�sq. h x /•�S� <br /> ft. _ -�J��.cu. �. <br /> 2. Divide cu. ft. by 27 cu. ft./cu• yd. to get cubic yards; <br /> s�3 cu. ft. +27 =,1�_cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons;L�.cu. yd. x 1.4 <br /> ton/cu. yd• _ �tons. <br /> F. ABSORPTION WTD7�'H A�avt'ptsoo WIdW S!�Tkble <br /> 1. Percolation rate in top 12 i.nches of soil is �mpi ���� ��T�� �r� �„��� <br /> Texture �L�`-( �-v�w� cM� �+ro« �,�wk <br /> Pwer du�0,1 Catw S+nd I30 1.00 <br /> 0.l ro S Saod 120 1,00 <br /> .2, Select allowable soilloading rate fxom table; o.�'°s Fl°'s°°° o.�o �.°° <br /> 6 ro IS S�oQr L.a�m 0.�9 1.32 <br /> i • 16 a 30 l.oem 0.60 t00 <br /> �L �a�� ��m s�a� o� i� <br /> tion width ratio b dividin rock layer �'°"t'�'"120 � o�o s.00 <br /> 3. Calculate adsorp Y g . <br /> loading rate of 1..20 gpd/ft2 by allowable soil loading rate; <br /> 1.20 gpd/ft�+��gpd/ft� _ • ��._ <br /> 4, • Multiply adsorption width ratio by rock layer width to get <br /> required adsozption width; <br /> �.� x�_ft= a�. h <br />