The Town of Hempstead Department of Sanitation retained H2M to provide post-closure environmental monitoring services at the Town’s municipal landfills in Merrick and Oceanside. At the Merrick Landfill, H2M conducts semi-annual groundwater and surface water sampling. Groundwater samples are collected from 11 monitoring wells and surface water samples are collected from three locations along the landfill perimeter. In addition, H2M conducts monthly landfill gas monitoring to measure methane and hydrogen sulfide. On a quarterly basis, H2M also monitors the ambient air downwind of the gas vents for methane and hydrogen sulfide.
At the Oceanside Landfill, H2M conducts semi-annual groundwater sampling and annual and surface water sampling. Groundwater samples are collected from eight monitoring wells and surface water samples are collected from 11 locations in the channels and canals along the landfill perimeter. All semi-annual groundwater and surface water monitoring data is tabulated and compared against the applicable standards and/or guidance values. In addition, the annual report addresses vector control, landfill maintenance, and landfill gas monitoring conducted by the Town.
