The relative or absolute increase in the frequency of adenocarcinoma of the cervix in the 1980s, coupled with the introduction of the endocervical brush, broom, and other endocervical sampling devices, has stimulated us to examine more carefully and classify more precisely the lesions of the endocervix.
If you do have one of these systems you need to know whether it's a conventional or alternative septic system, and exactly how it works. Gravity System-A conventional system which uses gravity to force the wastewater out into the drain field. 2  These types of septic systems use gravel as a filter. 3  Pressure Distribution System-A conventional system which involves the use of a pump.
A septic system, properly installed and maintainedis a good way to treat wastewater and to protect groundwater quality when municipal sewer service is not available. A typical septic system consists of two major parts, the septic tank and drainfield.rom the septic tank, the liquid portion of the wastewater flows into the drainfield, which is generally a series of perforated pipes or slotted panels that are usually surrounded by a layer of gravel, tire chips, or other lightweight materials such as styrofoam pieces.