You can avoid septic tank problems by ensuring your tank is made from the right material. The majority of septic tanks are constructed out of concrete, fiberglass, polyethylene or coated steel. Typically, septic tanks with a capacity smaller than 6,000 gallons are pre-manufactured. Larger septic tanks are constructed in place or assembled on-site from pre-manufactured sections.
There seems to be a mystery about hydrogen sulfide and septic systems. In some areas of the country the damage related to hydrogen sulfide is severe, and in other areas it is a non-issue.