The price of $345 includes one hour of digging.  I prefer to uncover the septic tank covers, the distribution box and the SAS with a shovel because heavy equipment makes a mess out of your yard.  This should be reasonable if the "as built" plans at the Board of Health are accurate.  If the digging takes longer, the charge is $60/hour.  The $345 charge includes the inspection inside your house, one hour of digging, research at the Board of Health, getting the water report for the last two years and the final report filed with you and the Board of Health.   Sometimes the system is difficult to find or very deep.  I don't usually dig deeper with a shovel than 3 feet because of the risk of cave ins.  In this case, I may have to bring in a backhoe at additional cost.  Title V is a state mandate, but the local towns often have additional regulations that dictate exactly what must be done in their town.  In some towns a current soil log is required.  In other towns the septic tank must be pumped as part of the inspection report.  Some towns have charges for filing reports or for water reports.    Filters are an option that you may want to consider.  I have a filter on my septic system.  The cost is only $40 and is well worth the price.  Filters should be cleaned annually.  Some towns require a local license in addition to the state certification that I have.   I may charge a premium for driving time.  All of these costs are extra.  In spite of all of these possibilities, the cost is usually only the $345.