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David-N-GA
11-11-2004 19:54:55
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Re: septic systems in reply to LRH, 11-10-2004 16:24:05
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In our state, Georgia, septic systems should be put in on a contour and we don't have a choice of how many feet of drainfield or how deep the drainlines should be put. In "bad" soils such as heavy clay or soils which perk slowly, often times we must haul in fill dirt which consists of sand which has a small amount of clay mixed in so it won't erode as bad. At first contractors scoffed at these "mound" systems which is what they are referred to around here, but in actuality, they really perform well in most cases provided the drainfield installed is the required amount for the amount of bathrooms and people living in the structure. The product I install is not gravel lines, but a product called Infiltrator Septic System Drain lines. These are molded plastic pieces that are 6'3" long per section and simply snap together until you get the required amount of drain line installed. When properly "packed in" along the sides with fill dirt before backfilling, they will support a backhoe passing over them without caving in. Thus, upon completing the system and box blading it smooth, one should never have any problem in passing over the system with equipment like a large mower, small tractor, or pickup truck. I'm very satisfied with the Infiltrator system and since the entire bottom of the drainage ditch is open as well as side vents for the efluent to pass thru, we get a 50% reduction in drain line length by using this product in our state. Especially good when using a mound type system as one doesn't have to purchase so much fill dirt since the drain field area is half as much. Bottom line, in most cases, you would want your drain lines to be as close as possible to the ground surface as septic systems rely greatly on the sun for evaporation to work and most of the lighter soils that water can penetrate easily lie closer to the surface. I found thru many years of trial and error running a large mobile home park that just putting something in the ground to say you have a system installed is NOT good. Putting a system in the ground that works, IS good. Good luck with your system.
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