: looking to develope 75 acres and i need a private sewer system instead of the old septic tanks. any direction would be appreciated, thanks cpI would first suggest that you contact your local municipality, local department of environmental protection to determine the allowable systems and general design criteria for your state.I work primarily in Pa and specialize in land-based wastewater disposal on projects typically over 2000 gallons to over 50,000 gpd.Take Care and good luck