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, 07/07/2668 09:24 9528733112 PAGE 67/14 <br /> Mound Design Worksheet (Far flows up to 1200 gpdj <br /> All boxed rectengles must be enter�d,fhe rest will be calculafed. ��'������� <br /> A. FLOW <br /> EsGmated 750 gpd(see flgu�e A-1) <br /> o�meesured x 1.5(safety factor)= 0 gpd �0°°° �I do�M Q�dl CtasslV <br /> 2 300 �!5 180 6�1i <br /> B. SEPTIC TANK LIQUID VOLUMES 3 �50 900 218 ofihe <br /> 5ep0c Nank capaaty 2250 gallons(�ee figure C,1) � �0 � �+ volu� <br /> 5 750 d50 294 in 1he <br /> C. SOILS(Site evaluation data) 6 9U0 525 332 CJo�I, <br /> 1. Depth to restricting layer= 1 f�eet � �� � � �'0��� <br /> 2, Depth of percolation t�sts= na inches � �� d� � c� <br /> 3. 7exhire loam <br /> 4. Soil loading rate(see Figure D-33 0.6 gpol ft <br /> Percolation rate 16-30 MPI <br /> 5. 96 Land Slope 6 96 n.�: au�o�uon waeks��tn� <br /> �M�a��s p� soi� �Ra°' nb. <br /> G!• Se k T�olc C dtles ffi T� rK M�' � <br /> 5� 9� P�tY Li d capaaty �.r�s v�«,.s.oa �ao �.00 <br /> Nuxnbcr of M�nimnm li d U ce u�Jth a�i�di 18c �nwo s.,a <br /> Bedroom� Cap�aciry gp�ba8e disposol li�l i�de �'O°��t4 . <br /> �oT ICss 7S0 11Z5 ��p '�i'w � o�n ""'"'�''.�"'" <br /> 3�[d 1000 1500 2ppa �eo so c� a.�s ss� <br /> 5 or 6 158b 2250 3� � <br /> 7,8 or9 2Q04 3000 a�w�w suo�t.�sy o,aa �s�w� <br /> m� ��� <br /> dwb�Mrilrr�oM n�.ut M o�'RpAa�wnw <br /> D, ROCK LAYER OIMENSIONS <br /> 1. Multipiy aver�qe design flow(A)by 0.83 to obtain required area of rock layer.Item A x 0.83= <br /> 750 gpd x 0.83 Rygpd= 622.5 ft� <br /> 2. �etermine rock layer width =0,83 ft�/gpd x Linear Loadin Rate(LLR)(see LLR charta <br /> 0.83 ft�lgpd X 12 = 10.0 R <br /> lLR Chart <br /> Perk Rate LLR <br /> <120 MPI <=12 � <br /> >=120 MPI <=6 <br /> 3. Length of rodc layer�area divided by width= <br /> 622.5 ft� / 10 feet= 82,5 Feet <br /> E. ROCK VOLUME <br /> 1, MulNply rock area by rock depm to get cubic feet of rock <br /> 622.5 X 1 ft= 622.5 ft', <br /> 2. Divide t�by 27 ft�to get cubic yards <br /> 622.5 fC� I 27 = 23.1 yd� <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in 6ons; <br /> 23,1 yd3 X 1,4 ron/yd3 = 32.3 tons • <br /> F. ABSORPTION WIDTN <br /> 1. Absor tlon widfh uals absorpGon ratlo(see Figure D-33)time9 rock layer width <br /> 2 x 10,0 8 = 20.0 ft <br />