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• e atmosphere near a wastewater pond contained no POND MANAGEMENT FOR INSECT.RODENT, more odorous gases that did the atmosphere AND ODOR CONTROI measured at corral fence lanes. Careless operation, however,can produce excessive putrefactive dors from long-term anaerobic sludge from pond bottoms. EThe way dairy wastewater facilitiees are managed Odor control,then,is accomplished by frequently I affects many people Including fly and air pollution removing settled sludge and diluting it with Irrigation control Inspectors,mosquito abatement operat water. This is best cone by pumping the lower pond and neighbors. if a wastewater pond is used only for water into an irrigation standpipein a blend of no more storm runoff Is emptied and dried promptly,and if that one part wastewater to three parts flowing was are controlled,there will probably be no water. Good sludge elimination and complaints. If it is used daily as a sump for reasonable oda-control also can be obtained by washwater,or as an irrigates reservoir,or just allowed admitting Irrigation water into the pond near the point to remain wet for long perlods,dose management will of waste Inflow and drawing off the manure-irrigation be necessary to prevent nuisances. Although house blend from near the bottom at the opposite end. This fly eggs will not hate in standing water,the moist must be done frequently to prevent excessive areas protected from the direct rays of the sun(e.g., concentration. The blend usually needs further under weeds or tali grass,In deep cracks In the soil,or dilution. In organic waste)are ideal places for fly development. Mosquitoes favor sheltered or stagnant water such as Peds that are used daily for washwater storage occurs near pond floatage or near banks with should 1.4 promptly refilled with 2 feet of water after vegetation growing or hanging Into the water. emptying to"cap"the odor-generating floor. Pond Elimination of vegetation at the water line,raising and structures that are only used for infrequent storm lowering the water level a foot or two every 3 days, runoff should be promptly dried to restore an odorless and separation of waste material that will float will aerated condition (Light harrowing will speed up simpiify fly and mosquito control. drying and will control fly larvae growth.) Ratywtram UC leaflet 2910) Ground.squirrel burrows are often a problem around levees. There should be a service road on top,and frequent vehicle use will tend to discourage squirrels. Vehicles(including tractors)will keep the soil compacted for hydraulic strength and safety. The road also will serve for weed and Insect control purposes. Elimination of vegetation will discourage burrowing rodents. Wastewater ponds,property managed,usually generate fewer odors than would the same total manure wastes remaining In the corrals. A US Department o Agriculture(USDA)study(Luebs,Laag, and Davis, 1973)In the Chino Basin found that the