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underground pipe and above ground lateral tubing and applied directly to the soil above the plant's root zone. Modifications to existing microirriation systems that can be expected to increase system efficiency and reduce offsite movement of nutrients , pesticides , and sediment are also eligible. Grade Stabilization This practice includes the use, of structures, ' Ape , concrete , rock , vegetation , synthetic fabrics , and other materials to maintain the stability and integrity of soils in ditches , swales , water furrows , and other erosion prone areas . This practice also includes equipment for chemical mowing of ditch banks to promote the proliferation of grasses through the exclusion of higher growing weeds and brush . On-Site Water Detention/Retention This practice will provide for the attenuation of both the rate and volume of off-site water and sediment discharge following heavy storm events. The water may be stored for future use or released offisite later at reduced discharge rates . . Permanent A richemical Mixing/Rinsing Facility and/or E ui met Washdown Facili This practice provides for the construction of a permar ent facility to contain and recover spillage or rinsate from a fertilizer or pesticide mix and load area or from an equipment washdown site. It is intended to preVE nt fertilizer or pesticide contamination of ground or surface waters . The facility r lay include a concrete containment pad , pesticide storage building , sump/pump , rinsate tank, mixing tank, holding tank , and removable or permanent roof. Portable Agrichemical Mixing Station A portable device used iri the field to prevent unintentional release of agrichemicals to the environment Juring mixing and loading of agrichemicals . The portable device must meet published standards and specifications (USDXNRCS Field Office Techn 'cal Guide — Interim Standard , Code 703 ) . The device can be used at more than one citrus grove. Precision Application Equipment Specialized equipment that ail ws nutrients and pesticides to be applied in a precise manner relative to he target of application . This includes sonic or optical sensors , devices that ap ly pesticides in a predefined , regulated manner, and equipment that uses GIS echnology to allow application based on a predefined map . Precision applicati n equipment often varies the rate of application , materials used , and location of pplication to achieve precise placement of the materials . Through this 11rogram , the department intends to cost share the precision elements of new quipment or retrofits to existing equipment that are needed to convert a on-precision spreader or sprayer into a precision spreader or sprayer. Water Table Observation Well This practice facilitates observation of the water table in a citrus grove and will help the manager to determine when groundwater levels are optimal . This practice will also improve irrigation efficiency and conserve water within the USJR and IRL watersheds by providing growers with an empirical tool to more accurately determine irrigation scheduling needs .