InterNACHI Septic case studies
InterNACHI Septic · Put your knowledge to work in context.
The InterNACHI Certified Septic Inspector designation is a specialty credential offered within the InterNACHI® membership and education ecosystem. InterNACHI® describes itself as the world's leading association for home inspectors, providing free training, online testing and certification, business development, marketing support, and discounts to its members. This page is an independent study resource for candidates preparing for a septic inspection certification exam; it is not affiliated with, endorsed by, or sponsored by InterNACHI®, and it does not reproduce any official question bank. The credential suits home inspectors who want to add septic system evaluation to their service menu, and inspectors already performing ancillary inspections who want structured preparation. The InterNACHI Septic case studies are 5 cases and about 2,779 words.
1High-Level Alarm After Rain: Pump Failure or Infiltration?
A 1,000-gallon two-compartment concrete tank serves a four-bedroom home. Its pump chamber has a high-level float alarm that sounded at 2:00 a.m.
589 words, about 3 min2Replacement Drainfield Siting on a Sloping Lot With Redox Features
A homeowner wants to replace a failed 1970s trench drainfield on a 0.6-acre lot. The proposed 60-foot by 40-foot replacement area lies on an 8% slope.
592 words, about 3 min3Inspecting a Buried-Lid Steel Tank on an Occupied Property
A 1978 ranch house has a 1,000-gallon steel septic tank with two 24-inch lids buried about 12 inches below grade. There are no risers.
560 words, about 3 min4Six Occupants, a Garbage Disposal, and a Water Softener
A three-bedroom home is occupied by six people. The 1,200-gallon concrete tank receives all household wastewater, including a 3/4-hp garbage disposal and the backwash from a water softener that regenerates weekly with about 60 gallons.
521 words, about 3 min5Wet Spot After Pumping: Biomat Failure or Distribution Problem?
A 25-year-old, 900-gallon concrete tank serves a four-bedroom home now occupied by two people. Three weeks ago the tank was pumped because sewage backed up into the basement.
517 words, about 3 min