The tank half
Pumping is part of the inspection, and the three-year waiver is the only documented way out of it
The single biggest reason two Palm Bay inspection quotes differ by hundreds of dollars is whether pumping is in the scope. The Procedure is blunt about it: the tank must be pumped to determine its capacity. There is one stated exception, and it is narrow. Where proof of a tank pumping, a permitted new installation, a permitted repair or a permitted modification can be documented within the previous three years, and where that document states the capacity of the tank and that the condition of the tank does not constitute a sanitary nuisance, the inspector may waive the pumping requirement. Old paperwork in a kitchen drawer is worth real money at inspection time.
With the tank empty, the visual inspection has a defined checklist rather than a glance: cracks, leaks or other defects in the tank; baffles or tees checked to ensure they are intact and secure; the presence and condition of the outlet device, effluent filters and compartment walls; any structural defects; and the condition and fit of the tank lid, including manholes. There is even a protective instruction that a homeowner can hold a contractor to - if the tank is, in the inspector's professional opinion, in danger of being damaged by being left empty, the tank is to be refilled with water before the inspection concludes.
The permitting route is separate from the voluntary route, and it has its own tank rules. Under Rule 62-6.003(4), F.A.C., an applicant seeking approval to use an existing system completes Form DEP 4015 with a site plan, and all system tanks are to be pumped by a permitted septage disposal service. A registered septic tank contractor, state-licensed plumber, person certified under section 381.0101, F.S., or master septic tank contractor then determines the tank volume - from the tank legend, from measured internal dimensions, from external dimensions minus wall thickness, or, for odd-shaped tanks without a legend, from metered water flows during refilling - and performs the visual inspection while the tank is empty.
One clause in that rule can remove the inspection from a Palm Bay transaction altogether: if a prior approved existing system was approved within the preceding five years and was determined to be in satisfactory operating condition at that time, a new inspection is not required unless there is a record of failure - and where no new inspection is required, only the application fee is charged. It is worth asking DOH-Brevard whether a prior approval exists on the parcel before paying for a fresh evaluation.