Show g 13 E CA FA pincas waste disposal system by IV J DRYDEN farm editor the septic tank provides one of the josf satisfactory means for the disposal of sewage when properly built it will require little or no BO attention for many years this is one job on the farm that demands concrete while it Is possible to build with treated timber it will prove far more durable and satisfactory it ff concrete Is utilized the forms for building septic tanks are rather expensive in many sections it Is possible to rent or insulating maternal mat erfal for the disposal field lines 0 of f 4 inch open jointed agricultural agriculture al drain tile laid in shallow trenches are ordinarily used sometimes halt half tiles or inverted wooden V shaped troughs are satisfactory the bottom of the outlet sewer should be set 12 inches from the top of the septic tank or 3 inches lower than the inlet the outlet sewer can be either cast iron soil pipe or 4 inch clay tile however the joints 4 41 7 4 4 01 I 1 the forms from local building supply dealers or contractors in most cases it is cheaper to contract tor for the construction than to buy the forms A septic tank is intended to handle sewage only coffee grounds and ground garbage may be included if water is available for flushing the size of the tank however should be increased by about 25 per cent when these materials are included in the sewage while septic tanks seldom freeze when in constant use it if the system Is to be out of service for a period of time or exposure to severe weather it may be advisable to mound over the poorly protected portions of the system with earth should be sealed lor for at least 50 feet out from the septic tank portland cement is used extensively ten in general construction work there are three kinds in cornmon common use 1 the ordinary gray cement employed for general concrete work 2 white cement used for white stuccos and ornamental art concrete and Q 3 early high strength cement especially useful under special conditions on account of its quick setting property this Is the type that should be used for septic tank earth carth backfill boc 4 paw paper boorse graw disposal i bat C I 1 0 f so r o e filo file 2 to 4 inches per set c slope file not less then than a olov ahm f fh to ai info rock tilled 0 cutlet bow iio ii o bouie arti fp gr a a CLAY claf OR CAST I 1 IROM ON 1 camtu OK cast IRON ewh swa a R WOT X MINIMUM i loo 3 SO OTO iff imf tf ROH OB r with asphalt reground line or cerneant slob baffles boffles used abe instead of atory feek na I 1 mn flow I 1 ahne I 1 a U 11 outlet 14 ci E 4 41 1 LENGTH A B D awny 10 gem farinolo cement corfar steps in joining sewer ripe |