Sites used for illegal dumping vary but may include abandoned industrial, residential, or commercial buildings; vacant lots on public or private property; and infrequently used alleys or roadways. Because of their accessibility and poor lighting, areas along rural roads and railways are particularly vulnerable. Illegal dumping can occur at any time of day but is more common at night or in the early morning hours during warmer months. If not addressed illegal dumps often attract more waste, potentially hazardous wastes such as asbestos, household chemicals and paints, automotive fluids, and commercial or industrial wastes. Offenders can include: construction, demolition, remodeling, roofing, or landscaping contractors, general hauling contractors, operators of junkyards, automobile repair or tire shops, scrap collectors, local residents and "do-it-yourselfers". A resident may dump wastes that did not get picked up by local waste haulers, such as bulky items, carpeting, or household hazardous wastes. Dump sites serve as magnets for additional dumping and other criminal activities. In many cases, illegal dumpers are breaking other laws relating to vehicle licensing, insurance, drug possession or theft. The costs to local government and industry associated with continuous clearing of illegally dumped wastes are significant. In recent years the County has spent up to one million dollars per year on cleanup, hauling, and disposal associated with illegal dumping. Without adequate revenue, the funding available to establish and maintain effective illegal dumping prevention programs is limited. These costs may be passed along to residents in the form of higher service fees or property taxes.