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III. Environmental Setting, Impacts, and Mitigations L. Public Health and Safety burrows and may range 100 to 150 feet from its burrow. The roof rat is smaller,with an adult weight of 0.5 to 0.6 pounds. It is a better climber than the Norway rat and may nest in walls, attics, vines,or trees. Birds such as gulls are frequently found at landfills. Generally birds are only a nuisance,but they are a safety concern near airports where they are a danger to low-flying aircraft. Because of the proximity of the Stockton Airport,bird strikes are an ongoing concern. Section III.A,Land Use discusses this issue. The CCR,Title 14, Division 7,Chapter 3, Section 17707 directs landfill operators to take adequate steps to control or prevent the propagation,harborage or attraction of flies,rodents or ' other vectors and to minimize bird populations. Section 17682 requires landfill operators to compact and cover waste with a layer of soil each day to minimize the occurrence of vectors. This practice lessens the potential for the landfill to provide food, shelter,and breeding grounds for vectors. Vectors can also be inhibited by minimizing litter and keeping the site tidy. Other than sea gulls, vectors have not been a significant problem at the Austin Road during the past two years (Wickes, 1993). To reduce the sea gull nuisance,the landfill operator has recently implemented several measures including auto firing cannons and paying tape recordings of a sea gull in distress. Sensitive Receptors With regard to public health and safety, a sensitive receptor is an individual or population that resides near or encounters a potential health hazard. For example,individuals living near the landfill site would be subject to the greatest risk from a fire,landfill gas explosion,disease vector,or an event that could contaminate air or water. The nearest residences are southeast of the current landfill operation are along Austin Road. One of the residences is on the property that the City intends to acquire. This residence would be removed to allow for landfill operations. The second residence is east of Austin Road, approximately 1,700 feet from the current fill area. With the project,this residence would be aPP Y P J approximately 500 feet from the landfill expansion. A California Youth Authority facility is approximately 1,900 feet north of the existing landfill. With the project,the borrow area would be approximately 300 feet from the CYA facility. HI.L.12