TJ, I use a Tru-core sludge sampler for tank layer measurements. http://www.gag-simtech.com/index_files/Page832.htm
I also have a small submersible pump with 150 ’ hose, for flow testing. Lots of waterfront property here to pull water right from the lake. I also welded up a dozen 4’ steel rods with a “T” handle on it for probing. Make one with a hook on the end for lifting the float on the dosing chamber pumps. It also works good on sump pump floats. Spray painted them orange, and they stand out good in the photos at each corner of the septic tank.
Maybe one other “specialty tool”…some noseplugs ! :shock:
It’s called a soil test coring tool and a quick internet search will give you plenty to look at. I have never used this tool on our septic inspections and prefer to hand dig the leach field or EDA (Effluent disposal area). In my opinion to really know what is going on you need to dig down into the field and take a good look around. We used to have a guy here in NH who would probe into the soil with a 3/8 rod and if the rod came up “dry” on the end he would declare the system in good condition…he is long gone. Look up fellow NH inspector Peter Russell, he posts regularly in the Auxiliary Inspection section of this forum…he knows his sh*t and posts many pictures of his septic inspections and proper methods for inspections.
Here’s the probe I use. Very helpful for systems that are deep and you need a sample of the sand under the laterals. When sand base systems age the sand will turn from it’s natural color to gray then black. These probes obviously only work on sand systems but still a good tool to have.