Hopefully the diagrams below will help you understand what is necessary for a Health District Inspection. If you do your own self-inspection, you must be able to determine the measurements of the scum and sludge layers in relation to the top and bottom of the baffles. The scum layer is not too difficult to measure, but the sludge layer can be a little difficult, because it is really a loose, floaty layer that is hard to determine when you're in it. In this section, we will show you a way to try to measure this layer, but honestly, we have not had a lot of luck with it. To me, it's difficult using this method to really tell just how thick the layer is. The health district officials tell me it works, but all I can say is "good luck".

Also keep in mind that if you have a pump system of any type, there is more to an inspection than just the tank measurements. You also have to check the pump chambers for proper dosing to the drain field and/or sand filter. The alarms must be checked for proper operation, and the overall condition of the chamber should be checked. If you have an aerator type system, this must be inspected every 6 months by a qualified licensed inspector.

Anyway, if you want to try inspecting your own tank, have fun. Remember, this too can be a family bonding experience as well as educational. Get the kids out there to help dig out the tank (see Tank Lid Layouts) and then show them and teach them all about septic systems. Remember, never leave a septic tank lid open or exposed in any way that a child or animal can fall into it. They are usually about 5 to 7 feet deep and dangerous!

NOTE: Though not specifically written as a requirement for pumping, it is highly recommended and generally accepted by most inspectors I know, that if the scum layer is 12 inches or thicker the tank should be pumped. Also, if the sludge layer is 12 inches or thicker the tank should be pumped.