SANDY HOOK, NJ -The Sandy Hook Unit of Gateway National Park will open on May 1st.  Three beach areas, (B, Gunnison and North Beach) will open on Memorial Day weekend.  The repairs to the wastewater treatment plant will not be finished by this date, so some beach areas may be serviced by temporary restroom facilities.  The repairs to the ferry service and bike path at Sandy Hook may not be completed by Memorial Day weekend.