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KLEINFELDER <br /> 2.2 WASTE DISPOSAL HISTORY <br /> 2.2.1 Waste Characteristics And Volume <br /> It is estimated that approximately 4 million cubic yards (in-place) of waste have been <br /> disposed of at the landfill from 1965 to the present. This estimate was based on a review of <br /> fill elevations, past subsurface borings and a review of site waste quantity information. <br /> Over 90% of the waste disposed of at the site was received from the county owned and <br /> operated Lovelace Road Transfer Station. The waste was generally municipal solid waste <br /> and is generally composed of residential, commercial and industrial solid waste. A detailed <br /> waste characterization had not been performed for the site at the time of this report. <br /> According to discussions with Foothill Sanitary Landfill, Inc., the landfill also accepted bio- <br /> medical waste from commencement of operations to the present. Currently, biomedical <br /> gate waste quantities range up to approximately 500 cubic yards per month. <br /> 2.2.2 Waste Disposal Methods <br /> Municipal Waste: <br /> Operations at the landfill from 1965 to 1969 generally consisted of excavating trenches and <br /> filling them with refuse which was burned and covered periodically. The majority of the <br /> burning at the site occurred from 1966 to 1968, at which time the San Joaquin County <br /> Local Health District required that burning at the site be stopped. Waste disposal during <br /> this period generally occurred in westerly portions of the site (See Plate 2-1). <br /> Cut and cover operations were extended to the other disposal areas shown on Plate 2-1 <br /> through the 1970's and 1980's. Subsurface borings completed by Kleinfelder in 19859 <br /> indicated that the fill depth was 45 to 65 feet in two borings completed. When areas had <br /> received waste up to the elevation of the original topography, the fill was extended up by <br /> area fill methods to the approximate grades shown on Plate 2-1. Plate 2-1 is taken from an <br /> aerial topographic map of the site compiled by San Joaquin County in November 1987. <br /> Waste placement methods at the site after 1968 generally consisted of pushing of the waste <br /> into the active fill area and then compacting with a dozer and/or landfill compactor. <br /> FOOTHILL 13 <br />