AzOWRAis a non-profit association that promotes the recycle of on-site wastewater from septic systems.
Mills Engineering, LLC is the sponsor of the septic-design.info blog. The company became a full-time venture for Professional Engineer Kathy Mills in 2006 with the mission to offer high quality water and waste water project design services in Arizona.
What is a Seepage Pit? It is a 4, 5, or 6 foot diameter hole drilled straight down 30 to 50 feet. Typically it is filled with ¾ to 2-inch diameter rock (just like a leach trench) with a perforated pipe installed in the middle of the hole, and continues to the bottom. The pipe is connected to the outlet pipe from the septic tank with a tee or elbow.
When you decide where to buy a home and to live, what do you consider?
At the heart of every great product lies a fantastic design. A design that effectively blends form and function to create a product that meets all of its functional requirements in a cost-effective and aesthetically elegant way. A design that ensures durability and performance for the life of the product. A design that can be malleable enough to accommodate future changes to the product's feature set or usage applications. A design that meets all regulatory requirements and customer specifications. In short, a design that takes all relevant factors into consideration.
Are you looking at installing a septic system for your project? Do you want to find out if you can choose seepage pits for disposal?
The Arizona Administrative Code (state rules) state that seepage pits are only allowed in areas with “valley-fill sediments in a basin-and-range alluval basin.” (AAC R18-9-A311.B.1)
Alluvial basins are typically the areas within valleys that have been filled with hundreds of feet of fill soil washing down from the surrounding mountains.
These areas typically have groundwater several hundred feet below the surface so a seepage pit septic system will have plenty of soil to provide filtering and treatment before the water reaches the groundwater below.
The ADEQ website asks a user to enter the latitude and longitude for a site and optional Owner, Address, and Parcel number.
After the user clicks “Submit,” the Latitude and Longitude are used to locate the site on the G.I.S. map that also shows the boundaries of the basin and range alluvial areas.
The map appears with an X marking the project site and light orange or peach coloring for areas where seepage pits are allowed.
To find the latitude and longitude, here are several websites:
Here is an example of a site that we recently checked in Phoenix to find out if seepage pits would be allowed (they are not and it is near some hills with rock outcroppings):
A lot of people in the world do not know how to care and maintain their septic System. Septic systems are found in both rural and urban areas and maintenance is important for both areas.. Urban areas will likely have more concentrated areas with septic systems making it critical for proper maintenance.
Most rural homes use some type of septic system to treat household waste water. These systems generally are economical and effective in treating and disposing of the waste water. However, your septic system must be properly designed, installed, and maintained to reduce possible harmful impacts to the groundwater that supplies your drinking water, your neighbors’ drinking water, or to surface waters such as a nearby stream. Although a well-functioning septic system poses little risk to drinking water, a poorly operating system is a potential source of disease-causing bacteria, viruses, household chemicals, and nitrates. If significant amounts of any of these enter drinking water, they could produce
What is a Trench Leach Field Septic System?
Septic leach trenches for disposal of septic tank effluent are 1 to 3 feet wide trenches that have up to 4 feet of aggregate rock with a perforated pipe installed down the middle of the trench on the top of the rock. The pipe is connected to the distribution box and the septic tank outlet pipe. Typically the aggregate rock filling the trench has a diameter of ¾ to 2-inches and has been washed to remove fines. The water leaving the septic tank drains to the perforated pipe in the trench where it leaks out the holes. It then is absorbed in the soil at the bottom and on the sides of the leach trench. Treatment of the septic tank effluent water also occurs in the soil as microbes grow and use the organics and nutrients. Physical filtering of the water also occurs in the soil.
Where can they be used?