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1.0 INTRODUCTION <br /> A scope of work with associated cost estimate is herein provided for <br /> further investigation and a subsurface fire suppression demonstration at <br /> the Kailua-Kona Landfill.. This work may be incorporated into a <br /> Supplemental Environmental Project(SEP) as determined by the United <br /> States Environmental Protection Agency (USEPA) and the County of <br /> Hawaii. <br /> 1.1 SITE DESCRIPTION AND HISTORY <br /> The Kailua-Kona Landfill is a closed municipal waste landfill in the North <br /> Kona District, about 3 miles north of Kailua-Kona on the west coast of the <br /> Island of Hawaii (Figure 1). The landfill operated from about 1975 until <br /> 1993. The landfill is approximately 20 acres in size,located east of the <br /> Queen Kaahumanu Highway (Tax Map Key 7-4-08:16,Figure 2). <br /> Neighbors include the Kailua Police Station and Kealakehe Elementary <br /> School (Figures 3 and 4). The closest residence is nearly 1 mile east of the <br /> landfill. During operation, several landfill fires were known to exist,and <br /> waste combustion is believed to have continued after landfill closure to <br /> the present time. Based on discussions with the County of Hawaii and <br /> USEPA and review of available historical documents,ERM has developed <br /> project objectives and a scope of work to achieve stated objectives. <br /> The USEPA and the County of Hawaii provided ERM with historical <br /> documents regarding the landfill. A list of documents received and <br /> reviewed is provided in the References section of this report. <br /> Municipal solid waste was disposed of at the facility from the late 1970s <br /> until 1993. Waste was placed directly on basalt bedrock without an <br /> underliner system;high permeability lava tubes are thought to be present <br /> beneath placed wastes. Subsurface fires within the waste material and <br /> odor complaints from neighbors are documented as early as 1991. <br /> Also in the early 1990s,before final landfill closure, studies were <br /> performed to evaluate landfill gas and ambient air at the landfill and the <br /> adjacent Police Station. Air samples were analyzed for volatile organic <br /> compounds (VOCs),but none were detected above blank control <br /> concentrations. At the time,landfill fires ("hotspots")were known to <br /> landfill employees; the h.otspots would result in visible flames when <br /> exposed. Parametrix (1992a) interpreted temperature probe <br /> measurements to indicate that perimeter landfill areas with greater <br /> ERM 1 KAILUA-KONA LANDFILL/0061204-3/14/2008 <br />