1968 my father build a septic system following directions & it is great. i want to know how that be build.?
Answers: Well, that depends on the location of your system, what area of the country you live.
Basically you NEED to have a travel document to install the system. Contact your local health department and they will give you the instruction you requirement. depending on the area you can install the system yourself, or you might me required to have a certified contractor install it.
the system, contained by order to work properly must be installed 24 inches above the seasonal high sea table, if not you won't be able to use your system during sweet rains or when the water table is elevated. (either it will back up into the house or surface in the backyard, neither of which is pleasant)
a system usually requires 150 linear foot of gravel per bedroom. In a trench designed system the gravel is placed so that the bottom does not exceed 30 inches below the surface and is also 24 inches above the SHWT. 6 inches of gravel is placed in a 12 inch trench then a perferated pipe is laid lying on the gravel, level or with no more next 1 inch fall per 50 feet. after gravel is placed around and over to have a total of 12inches from bottom to top. On the top of the gravel either hay, straw or trated thesis is place to prevent the soil from infiltrating the gravel. then soil is placed ove the top to the surface. this soil will settle over time so usually more is placed over the top to allow for this.
Depending on your locations, there are indubitable setback requirements to surface water, potable well, property lines etc. Again since a receipt is required by the health department you will know these when you recieve the permit.
I hope this help
If you are planning to put in a septic system, you have to follow your county directions on that. Although the process of how septic have not changed for eons, putting in a system has significantly changed and they have become far more efficient. If you can find Encyclopedia's from the 50's nearby will be detailed instructions.
GOOD LUCK!