Laserfiche WebLink
� 1�/IOU�1D DESIGN WORK SHEET(For Flows u to 1200 d) <br /> A. Average Design FLOW q_�; E��1ed Sewoge Flow:tn Galloru per Dcy <br /> nu r o <br /> Estimated � � gpd (see figure A-1) bedroom: c�au� c�aas n c�au m c�au N <br /> or measured -- x 1.5 (safety factor) = gpd 2 � 225 »o � <br /> 3 . q5p 300 218 of the <br /> q bpp 375 256 values <br /> B. SEPTIC TANK Capacity 5 �50 450 294 in the <br /> 6 900 525 332 Class I, <br /> O 6 allons (see re G1) � �� � 3�o n,or ia <br /> L g fi$u g 1200 675 408 columns. <br /> 1 –!�9 6 o e�p„ • <br /> C. SOILS (refer to site evaluation) ci: c�'�ot c� �d�s uo�s <br /> Liquid capacity <br /> � � Number of Minimnm Liquid Liquid capecity with W��d��g� <br /> 1. Depth to restricting layer= 1. . a - feet B�t°°"� �'�' �� lift iasidc <br /> 2. Depth of percolation tests = �• 0 feet 2 a�� �s� »� �soo <br /> 3. Texture l.t�A'`� 1�0�4'w1 3«a �aoo �soo Z000 <br /> 5 a 6 1 S00 225U 300p <br /> Percolation rate 10�.0 mpi ��8�9 20°° 30°° <br /> 4. Soil loading rate -�t�' gpd/sqft(see figure D-33) <br /> 5. Percent land slop� % <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply average design flow (A)by 0.83 to obtain required rock layer area. <br /> gpd x 0.83 sqft/gpd = �oa� sqft <br /> 2. Determine rock layer width = 0.83 sqft/gpd x linear Loading Rate (LLR <br /> 0.83 sqft/gpd x �a gpd/sqft= �� ft Mound LLR <br /> 3. Length of rock layer= area+width= <br /> ��.sqft(Dl) + �ft(D2) = l�z- ft < 120 M PI <� 2 <br /> a— Io '� 31 ' '��'f-�3"�V5 — <br /> E. ROCK VOLUME > � 2O M PI < 6 <br /> 1. Multiply rock area (Dl)by rock depth of 1 ft to get cubic feet of rock <br /> ��z_sqft x 1 ft= lo�? cuft <br /> 2. Divide cuft by 27 cuft/cuyd to get cubic yards <br /> �_cuft +27 cuyd/��_�—cuyd <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons <br /> �_cuyd x 1.4 ton/cuyd =�_.tons <br /> D.33: Absorptlon Width Sizing Table <br /> percolation Rau Lu�din�Rne <br /> F. SEWAGE ABSORPTION WIDTH inMinutesper sa�T�x� c��«�. A�;� <br /> �h par day per Ratio <br /> N(p� usie foot <br /> F�sur�h�n S Cwne S�nd 1.20 I.00 <br /> Medium Sand <br /> Absorption width equals absorption ratio (See Figure D-33) `p""y S"id <br /> times rock layer width (D2) ' . :00 <br /> ��o as u► <br /> oc.�0 )C L 0 l t= ��O l t 46 w 60 Si�lt YQ l.o�m 0.45 2.67 <br /> 61 l0 120 Silty Gay 0.24 5.00 <br /> Sandy Clay <br /> owa�han 12 , <br /> •Syaem d�dpeA for Wae�oiY m�a be aber w omrnce <br />