[HayZee518]

check to make sure rain water drains away from your house. before the backfill is put in usually a perforated drain tile is put in the trench with gravel. the drain tile is channeled away from the house foundation/footing. your not in use septic tank should be filled with sand right to the top inspection cover. storm drains should never be drained into a septic tank anyways. if your house was constructed in one "pour" then you could all but eliminate leakage at the base ment bottom. if your footing was poured first and cured, then the walls were poured, at the bottom of the wall the footing has a "key" set in it so it [foundation walls] locks together but there is still a space not detectable between the foundation and footing where water could come in. you'll need a backhoe to check this out. plan on about $5000 for finding out where your leaks are.