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MWMC FACILITIES PLAN <br /> <br />timing and duration of biosolids land application (site life and seasonal constraints), and <br />· g.razing restrictions. <br />Access <br />Controlled access to bulk Class B domestic biosolids and domestic septage land application <br />sites is required for a minimum of 12 months following surface application of solids. <br />Controlled access means that public entry or traffic is unlikely. Rural private land is <br />assumed to have controlled access while parks or other public lands may require fencing to <br />ensure control. <br /> <br />TABLE 5.1.4-3 <br />DEQ Site Criteria for Biosolids Applicationa <br />MWMC Facility Plan, Eugene-Springfield <br /> <br /> Parameter Criteria <br /> Geology · Must have a stable formation. <br /> <br /> Floodplain · Restricted period of application and incorporate biosolids if in a <br /> floodplain. <br /> <br /> Groundwater · At time of application, the minimum depth to permanent groundwater is <br /> 4 feet; the minimum depth to temporary groundwater is 1 foot. <br /> <br /> Topography · Liquid biosolids application with appropriate management to eliminate <br /> surface runoff. <br /> Slope less than or equal to 12% <br /> · Surface application of dewatered or dried biosolids. <br /> Slopes up to 30% · Direct incorporation of liquid biosolids into the soil. <br /> Soils · Minimum rooting depth of 24 inches. <br /> · No rapid leaching. <br /> · Avoid saline or alkaline soil. <br /> <br /> Method of application and · Buffer strips may be required to protect water bodies. Size depends on <br /> proximity to water bodies method of application and proximity to sensitive area (variable with <br /> local conditions and left to discretion of DEQ), as described below. <br /> · Direct injection: no limit required. <br /> · Truck spreading: less than 200-fool buffer strip. <br /> · Spray irrigation: 350- to 500-foot buffer strip. <br /> · Near ditch, pond, channel, or waterway; greater than 50-foot buffer <br /> strip. <br /> <br /> · Near domestic water soume or well: greater than 200-foot buffer strip. <br /> a From OAR Chapter 340, Division 50, as amended. <br /> <br /> Crops <br /> As a general rule, crops grown for human consumption should not be planted for at least <br /> 14 months after bulk Class B biosolids or domestic septage application. If the edible parts <br /> will not be in contact with the biosolids-amended soil or if the crop is to be treated or <br /> processed prior to marketing such that pathogen contamination is not a concern, this <br /> requirement may be waived. No restrictions on planting time are required where Class A <br /> biosolids-derived products are land-applied to sites used for the cultivation of flesh market <br /> vegetables. <br /> <br /> 5-16 MWMC_5.0_REVS_VKS.DOC <br /> <br /> <br />