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2' General Engineering and Environmental Management Services Greensboro, North Carolina HDR has a long, professional history of providing quality engineering and Solid Waste Management services to the City of Greensboro. HDR and the City of Greensboro have worked together on solid waste issues since the late 1980's. At that time, HDR was hired to develop a vertical expansion over a portion of the White Street Landfill. The project was unique in that the vertical expansion was designed to include the installation of a liner and leachate collection system over approximately 85 acres of previously landfilled area prior to expanding vertically. The area designated as Phase I had previously been constructed utilizing the trench method of landfilling, which resulted in large areas settling and pending of surface water. The liner design was to act as a cap over the closed landfill, preventing future infiltration of surface water, while serving as a bottom leachate collection system for the vertical expansion. After extensive negotiations between City and HDR staff and the NCDENR, the regulatory agency allowed the City to operate a vertical landfill expansion in the area utilizing land clearing and inert debris material. This provided fill material to eliminate the pending of surface water and promote positive drainage away from the site. PLANNING ACTIVITIES From the initial design activities in Phase I, HDR developed a Master Plan of the site to provide for proper implementation of proposed facilities including disposal cells, borrow operations, site buffers, and areas for leachate and gas management systems. This plan identified the additional properties that the City would need to acquire to provide adequate waste disposal capacity in the most economical manner. The Master Plan resulted in the acquisition of additional properties that increased the total landfill facility to an area of approximately 767 acres. :. In 1991 and 1992, HDR conducted a "Before and After' Waste k- Stream Composition Analysis for the City as part of a U.S. EPA- funded study of the effectiveness of public education on reducing the g ' ` amount of solid waste generated by individual households. During the spring of 1991, wastes collected from F 250 homes in a target neighborhood and 250 homes from a control neighborhood were manually sorted under the direction solid waste: of HDR staff into 22 categories at the a source Reduction White Street Landfill. Utilizing the initial : education program Residential Waste Stream 9 , Characterization study data, HDR recommended that the City target yard waste, disposable w paper products, junk mail, and food waste for source reduction. Upon completion of 4 ' the initial Waste Stream Characterization portion of the project, the City initiated a �*'�' _ P P 1 Y Solid Waste Education Program to all residents in the target neighborhood. During r� the spring of 1992, HDR repeated the process of hand - sorting and weighing the _ waste components generated by the 250 target households and 250 control households included in the study. The data collected during the 1992 Residential N - Waste Stream Characterization Study was analyzed and compared with the 1991 baseline indices. The final results were tabulated and compiled into an extensive ; report. Page 12 i iq