Our firm provided the design of a vacuum sewer system to replace the existing septic systems at Island Beach State Park. The drastic variation in seasonal flows combined with flat topography would be problematic for a traditional gravity system. A vacuum sewer system was able to service the inconsistent, seasonal flows and avoid long detention times, septic conditions, and settling solids. By pulling (vacuum) rather than pushing (pumping) the wastewater through the system, the system generally remains empty during the extended low flow periods. We designed the vacuum system, including two vacuum pumping stations, provided service over seven miles of parkland, and conveyed the wastewater to the Berkeley Township Municipal Utilities Authority.