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MWMC FACIUTIES PLAN <br /> <br />timing and duration of biosolids land application (site life and seasonal constraints), and <br />g.razing restrictions. <br /> <br />Access <br />Controlled access to bulk Class B domestic biosolids and domestic septage land appl/cation <br />sites is required for a rnirdmmn of 12 months following surface application of solids. <br />Controlled access means that public entry or traffic is tmlikely. 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 o Must have a stable formation. <br /> <br />Floodplain o Restricted period of application end 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 ,s 1 foot. <br /> <br />Topography · Liquid biosolids application with appropriate management to eliminate <br /> sudace runoff. <br />Slope less than or equal to 12% <br /> · Surface application of dewatered or dded 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 stnps 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-foot buffer stdp. <br /> · Spray irrigation: 350- to 500-loot buffer strip. <br /> · Near ditch, pond, channel, or waterway; greater than 50-foot buffer <br /> strip <br /> <br /> · Near domestic water source 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 fresh market <br />vegetables. <br /> <br />5-16 MWMC_5.0_REVS_VKS DOC <br /> <br /> <br />