I would like to oppose the maintenance contract.   There is no reason for it.   If you have a contract with an authorized agency to test your system once a year, then the VDH comes and tests once a year and you keep records of every tablet and the date you add to the system - why do you need it??   No one wants to contaminate the streams, but EPA regulations are becoming too burdensome for ordinary folks to live with.

Before adding more cost to the folks with alternative systems, how about spot checking traditions septic systems to see how long since they have been pumped and if they are working properly.  If they do not operate properly, that sewage goes directly into the watershed untreated.