Laserfiche WebLink
JHFI—�=�4-1���=tGi �� __ F'.�=t= <br /> Mound Desi n Worksheet <br /> _.. �., _ .._..,.._. .� <br /> � <br /> A. �Iow : <br /> F,�tim�ted at 454 g�l�ons per day (gpd} for a three be room dweliia� _ I <br /> � <br /> B. S�eptic Tank Liquid Volumes <br /> #;ofs�ptic tanks�;2 �:capacity = each, 1U00 alians us� e '� � fi if e ed <br /> L'ii� station capa��tiy �' 000 allons if they are not,pu_m�and backfill� <br /> C. Soils (ref�r ta sail's io�and percolation data she�ts that follow) <br /> 1'; Depth to r�s�ctin� layer= ?6" <br /> ?; Depth af per�blati�n tests= 12" <br /> 3!. T�xt�re of soils are C12�y �oain with a gercalaiion rate u�43 rnittut�s�er inch. <br /> 4. Land slope = I 0 ta �2% max. �_„___ ._ <br /> --- _ � ._�.. — <br /> D. Ii,ock Layer Dimensions <br /> t.. Muttiply flaw�rate�by ,83 tc� abtain required area of roek layer, A :� 0.33 = <br /> 450 x .0_83 �= 380 sauare feet <br /> , <br /> ?. RQck bed wiclth vvjlt b� 10 feet <br /> �. Len�th of rock lay,er is the square f�et area/�vidtk� = <br /> � 384�38 �nesl feet <br /> E. I�ock Volume � <br /> �. Ivlultiply the rock area by the roc� depth to deterrnine the cubic teet of rock: <br /> 380 x 1 =i38U�ubic #'eet <br /> �. Divide the cubic f�eet by 27 eu. Fc�t to det�rmint the cubic yaxc�s: <br /> 38d/2?'= 14.p7 cubic yards <br /> 3_ Mul�iply the Cubia yards by 1,4 to determin� the weight of rock in tons: <br /> 14,07 x l.,4 =�U toas of ciean washed a re�ate rock. <br /> .._,_ �____.._ -- rrrw <br /> r <br /> � n Q' i�.... <br /> �eC SUtl � R.►7r�ot <br /> F. �ibsorption Width �..� ,��� � ����Nw�*►+ <br /> � � ,-���a��� <br /> �, , � >:41 Smd 1,7A l.Ua <br /> 1. Percolat�an rate iri the to l2" of sdil is 48 m i. °•'m ''m '°° �--- <br /> � P o.�m s s�a oeo z.00 <br /> Texture is clay 1o$rn- 661� '-°� o� xn� �'. <br /> 3!b�s t L� 030 3.� ,, <br /> A6 ro 60 O.N 1.67 <br /> � <br /> �. Select allow�le �oil loading rate from Table. � � �u s�0° <br /> Q.45 gali4ns pjer day pe�square foot of rock are� =�x� �� �� �m <br /> 3. Calculate the�abs�rprion wicith ratio by dividing the rock lay�r[oading rate of i�2 <br /> �pd/ft2 by�l�owable soil loading tate: <br /> � 1.2!0.45�= 2:167 <br /> 4. Multiply the abso ption width ratio by the rock l�yer�rridth to d�termine the <br /> required abs��m�,n width; ' <br /> 2.67 x 1�=2 f t <br />