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LEA Advisory 20 Attachment- Inspection Guidance for SW Landfills Page 30 of 52 should be informed when new measures are proposed which include the use of leachate for dust suppression or irrigation. An area of concern should be noted if the site has numerous violations concerning dust control issued by the APCD or AQMD and/or a recent history of citizen complaints, but the inspector does not observe a violation of this standard during the inspection. Vectors/Birds 17707 Vector and Bird Control The operator shall take adequate steps to control or prevent the propagation, harborage or attraction of flies, rodents or other vectors and to minimize bird problems. Populations of birds, mosquitoes, and other insects or animals which can transmit disease to humans must be prevented or controlled. The operator of a landfill with bird problems should be encouraged to use the wire/grid system after consultation with the Department of Fish and Game. Potential bird hazards to aircraft at a facility within 10,000 feet of an airport should be evaluated for compliance with §17258.10- Airport Safety. Nuisance problems concerning the migration of birds from a landfill to nearby residences should be addressed under this standard. In addition, bird problems may include the propagation, harborage or attraction of birds that are natural enemies of endangered or threatened species that are endemic to the area surrounding a site (e.g., desert sites where ravens, a natural enemy of the desert tortoise, are attracted to landfills). An inspector should consider a site to be in violation of this section if excessive numbers of adult flies are present or if immature stages of flies or mosquitoes (larvae or pupae) are observed developing to the adult stage on site. It is a good indication that flies or mosquitoes are excessive if the inspector begins to notice and is bothered by them while walking around the site. If clusters or groupings of flies are seen on fences, walls, vehicles or other lower attractant areas, there is a fly problem. If a live rat is seen on the disposal site during the inspection, this is an indication that more rats exist and that the facility may have a rat problem. Active rat burrows or fresh droppings also indicate a rat problem. Also, many ground squirrel burrows near the working face of the landfill are an indication that these rodents are filling the rat's niche. These rodents can act as disease vectors. 17715 Ponded Liquid Any ponds used for holding liquid waste or for leachate control shall be designed and operated to minimize possibility of vector propagation. Conditions that must be considered include water depth, side slopes, weed control and the protection of wildlife. Any engineered or non-engineered on-site ponds designed for holding liquid waste or leachate should have some type of mosquito abatement effort or program. Drainage/Erosion 17708 Drainage and Erosion Control http://www.ciwmb.ca.gov/pe/advisory/20/attach2O/20attcli l.htm 8/11/98