In San Joaquin County there are five Class III sanitary landfills, one Class II sanitary landfill, three transfer stations, and one planned transfer station. The California Waste Removal Systems materials recovery facility (MRF) provides residential refuse collection services for the northern areas of the county. The MRF has a tipping area of 15,000 square feet and is capable of receiving 2000 tons per day. The Tracy MRF is available as of April 1995. The Gilton Solid Waste Management MRF provides franchised residential refuse collection service in the central county area. State Highways 99 and 4, and Interstate 5, 205, and 580 connect the county both east-west and north-south, providing excellent access and same-day delivery service to major California urban markets. Three international airports, the Sacramento Metro Airport and San Francisco Bay Area Airports are within easy driving distance. Stockton Metropolitan Airport provides excellent commuter flight connections and accommodates large jet transport. Three interstate railroads, the Union Pacific, Southern Pacific, and Santa Fe, provide excellent transportation for both passengers and freight. The Port of Stockton, a major link to San Francisco, serves ocean-going vessels from around the world through the 37-foot-deep Stockton Channel.