01What system is present—or proposed?
Look for permits, as-built drawings, inspection reports, maintenance agreements and pumping records. If the system is unknown, avoid assuming that visible lids or a seller's description identify the complete layout.
02Is this maintenance or a failure?
Slow drains, sewage odors, surfacing wastewater, alarms and unusually wet areas may require prompt professional evaluation. Pumping can be maintenance, but it does not by itself correct every design, soil or component problem.
03What can fit on the site?
Soil, slope, setbacks, wells, buildings, property lines, drainage and a replacement area can affect system options. The current local or state process determines the required evaluation, design and approval.