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1'VIOUND DESIGN WORI< S�iEET (For Flows up to 1200 �pd) <br /> A. Average Design FLOW A-1: Estimated Sewage Flows in Gallons per Day <br /> number of <br /> Eshmatec� "?��� gP(� (See�igtlt'e f�-1) bedrooms Class I Class II Class ill Class IV <br /> or measured - x 1.5 (safety fncfor) - ��� gp � 300 225 tno bo°io <br /> 3 450 300 218 ofthe <br /> 4 600 375 256 values <br /> I3. SEPTIC TANI< Capacity 5 750 450 294 in the <br /> 6 900 525 332 Class I, <br /> �,-�r���.� ,�,�,6 gallons (see fig�cre C-1) � �05o boo s�o n, o�ni <br /> ��fi,r,,�r,� , .���.��,,��, ���r1��=1, .,��,�.: 8 1200 675 408 columns. <br /> ��. S�ILS �YefL'1" f0 Slte 2UCijilCit1011� GI: SeplicTankCal�acilies(in �allons) <br /> Number of htinimum Liquid l,iquid c�paciiy ui�h Liquid cap;icit� <br /> Bedrooms Ca ncih :arba�e dis osal "ith disposal�F <br /> l. Depth to restricting layer = I R S, t.{d�+ :��o feet �� � � � rr,;,,s;�� <br /> � <br /> 2. Depth of percolation tests = �• t�� feet �o�iess ��o �i'-� isoo <br /> 3. Texlure �'--�`i' 1.0����1 3o�a i000 uoo <br /> S or 6 I�00 2�50 '-000 <br /> 7,8 or 9 000 3000 3000 <br /> Percolation rate �=�a�.� inpi '- nn <br /> 4. Soil loading rate ,ti � gpd/sqft (see figicre D-33) <br /> 5. Percent land slope '� % <br /> I7. ROCI< LAYER DIMENSIONS <br /> 1. Multiply average design flow (A) by 0.83 to obtain required rock layer area. <br /> ����� gpd x 0.83 sqft/gl�d - �'")`� sqft-tr<a`,'°�. , a1.��,r-� � <br /> 2. Determine rock layer width = 0.83 sqft/gpd x linear Loading Rate LLR <br /> 0.83 sqft/gpd x 1 r? gpd/sqft= � �� ft Mound LLR <br /> 3. Length of rock layer = area = width = <br /> i Q sqft (D1) = �_ ft (D2) _ '-__�ft < 120 M PI <� �� <br /> E. 1ZOCI< VOLUME > 120 M PI < 6 <br /> l. Multiply rock area (Dl) by rocl< depth of 1 ft to get cubic feet of rocic <br /> ��i�� sqft x 1 ft = �1a 1; cuft <br /> 2. Divide cuft Uy 27 cuft/cuyd to get cubic yards <br /> "-�� 0 cuft = 27 cuyd/cuft = � S`F cuyd <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons <br /> _/ �� cuyd x 1.4 ton/cuyd = `�, I tons <br /> D-33: Absorp[ion Width Sizing Tnble <br /> �'. SEWAGE AB�ORPTION WIDTH Pcrculu�iunR:nc LoaJingR:�ic <br /> in Minutcs per Suil�icxlurc Gulluns Abs��rpiiun <br /> Ind� per J:ry per Ra�iu <br /> (MPI1 } uurc loul <br /> Fuslcr�hun 5 Cuursc S;u�J 1.20 1.00 <br /> 1�Usorption width equals absorption ratio (See Figure D-33) �;�n>'s��� <br /> _finc$�nJ_ <br /> tiines rock layer width (D2) �«�5 �.v���_az2— .50 <br /> 16 ta 30 Lnam 0.60 2.00 <br /> 31�0 45 Sih l.uwn 0.50 2A0 <br /> ��.�^E ° X �S� ft = � �•!"��� ft 16 io 60 S:u,�y Cluy L�.r.ni OAS ?.67 <br /> Silty Cluy t,aum <br /> •yJ.uu <br /> 61 l0 120 Silty Clay 0.24 5.00 <br /> Sundy Clny <br /> Cln <br /> Slowcrlhan 120' <br /> •Sy.icm Ji•.i�n�J f��r ihi.c.nii��nv.�hc�nhi�r�r�nrinrmu�n:c <br />