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g0/1612065 16:09 7634988296 RUSTYS PERC TESTING PAGE 04 <br /> �ound Design Worksheet (Fo�flows up to 1200 gpd) <br /> A�bared�e�nQ�muat be�rdered,the rasi rNN be cala�ared. <br /> A. FLOW <br /> Esqmated 750 �d(see tlg�A-1) <br /> or meeowed x 1.5(sefely faceoc)= �gp0 <br /> B. SEP'TIC TANK LIQUIO VOLUMES <br /> Sepdc tanic c�qadt�r 3000 gallons(aeo flgur�G1J <br /> m � e � <br /> rnmum wilh <br /> eedroo►ns c •ty Ga�b. .ane urt <br /> 2 a less 750 1125 1500 <br /> 3 cr 4 1000 1500 Z000 <br /> 5 a 6 1500 2250 3pp0 <br /> 7,e pr 9 Z000 3000 4000 <br /> C. SOILS(S�e erw�uelior►dets) <br /> 1. Deplh b�sbictlng layoer= 2 i�eet <br /> 2. Oeplh af peioolaion lerts= 12 inches <br /> 3. Teocbure lo�mm <br /> 4. Shc lo�d'rq ra�e(see Fiyue 0-33 0.6 gpol it� <br /> Perooletlon rale 7 PI <br /> 5. %�ana s�ope �o �6 <br /> D. ROCK IAYER D�ENSIONS � <br /> 1. Mui�pq►a��ape deeign Aow(A�br 0.83 to obtain�equi�ed�ea of�adc laya:Ifem A x O.Q3= <br /> 750 �d x 0-83 f't�gpd= 6'22.5 1t� <br /> 2. De�eimine�k la�widtl� =0.8311�19Pd x l.inear R�e R)(see LLR d�ait) <br /> 0.831t21gpd x 1a = 10.0 ft <br /> LLR ChMt <br /> Pedc Rste I.L.R <br /> <120 MPI �12 <br /> >=1Z0 MPI �=B <br /> 3. L�gth of rock layer=srea divided by widlh= <br /> 622.5 ft/ 10 Feet= 620 feet <br /> E. ROCK VOLUME <br /> 1. Multlpyr iodc a�e by mck depth t�gei aibic feet of rodc <br /> 6?2.5 X 1 ft= 622.5 R' <br /> 2. Divide ft3 by 27 ft�lyd3 to get cubic yards <br /> 822.5 ft' 1 27 = 23.1 yd' <br /> 3. Multiply caibic yarda by 1.4�o got weight of ioGlc in tons; <br /> 23.1 yd3 X 1.4 EaVyd' = 32.3 mns <br /> F. ABSORPTION WIdtH <br /> 1, ' widlh uals absorption ratb(see Figure D-33)tlmes rock layerr width <br /> 2 x 10.0 R - 20.0 !t <br /> Page 1 of 6 <br />