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_ � 1VIOtJND DESIGN WO�tK SHEET(For Flows u to 12�0 d) . : <br /> A. Average Design F'LOW�� _ � A-1 s�f�imatod Sewc�a F14W;�n Gd��.pe�Dp�► <br /> ���. ' �.� ;� <br /> - ,:,.. <br /> • , nu r o � <br /> Estimated�gpd(see frgure A-1) . badroonu c�au� c.1au U c�as:u� c�au�v <br /> or measured — x 1:5 (safety factor) _ — gpd 2 � �� �� � <br /> 3 - 450 300 218 of the <br /> - 4 600 � 375 256 values <br /> B. SEPTIC TANK Capacity 5 750 450 294 in the <br /> 6 900 525 332 Class I, <br /> �-�aSo t 1-/ooa gallons(see figure C-1) � t� � s7o u,oru� <br /> 8 :: . 1200:. : 675 . 408 colurx�n <br /> C. SOILS (refer to site evaluation) � , ci: k7i�nk G tks allons . ` <br /> . Nqmber of Minimum Liquid .ligufdcap�ciry with. .��� <br /> 1. Depth to restricting layer= �.n , i,► �►•� feet �0°'°s �'�' ��� ut�►�,a� <br /> 2. Dept11 of percolation tests= 1•0 feet z«� �so . »zs �s� <br /> 3. Texture G�� ���kw� 3«a �000 isoo a,000 <br /> s a 6 �soo � a�so � <br /> Percolation rate�mpi � - T�8a9 . �o0 3°°° <br /> 4. Soil loading rate ,4 S gpd/sqft(see figure D-33). <br /> 5. Percent land slflpe % . '�. <br /> D. ROCK LAYER DINiENSIONS � � � <br /> 1. Multiply average design flow (A)by 0.83 to obtain required rock layer area. <br /> ��o �a X o.ss Sq�r��a = �.�� Sqfta�a��=c.��� <br /> � 2. Determine rock layer width= 0.83 sc�ft/gpd x linear Laading Rate (LLR <br /> 0.83 sqft/gpd x lz end/sqft= �o � ft i�lound LLR <br /> 3. Length of rock layer=area+width= <br /> (o�sqft(Dl) + ��_ft(D2) _�`�f t� � � < � 20 �P� <��2 <br /> E. ROCK VOLUME �' � � �I 2O M�PI � < 6 <br /> � - — . — <br /> 1. Multiply rock area (D1)by rock depth of 1 ft to get cubic feet of rock � � . � <br /> �'-�sqft x 1 ft= �� .cuft . � <br /> 2. Divide cuft by 27 cuft/cuyd to get cubic yards <br /> , ��4_cuft +27 cuyd/cuft.= � cuyd � <br /> 3. Multi ly cubic y�rds by 1.4 to get wei ht of rock in tons <br /> _�cuyd x'1.4 ton/cuyd =_�tons .. <br /> �' D�3:.Ab�p�ptioa WidW Sizfn�Ta61e <br /> Pm�o1M�m Ra�e ;Ln�din�Rau' <br /> F. SEWAGE ABSORP'TTON WIDTH 4� � �,�a.. sd�r.�� ci.��«,. ��«w�� <br /> �,, ,�,�.y �.�o <br /> _ uere <br /> '' Futarth�a3 Co�rieS�ad 1.Z0• 1.00 <br /> ; Medium Sud. <br /> Absorption width equals absorption ratio (See Figure D-33) `'""'Y�' � � <br /> times rock layer widfh(D2) ' . � � � <br /> a � <br /> a•�� x ,la ft-�ft " �w�o �ra� a.s z6� :}.f <br /> . 61 a t20 Suty a.r o.2t s.00 <br /> Sud Wy <br /> . . . . . � K7�undriprAPorNwdYa�wMatMrerprfe1m�en . . <br /> � <br />