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at a distance greater than one-quarter mile from the application site property line. This distance shall be decreased to the setback distance provided by subparagraph 62-640.700(8)(b)2., F.A.C., if the affected adjacent property owner provides written consent. (c) Class A and Class B biosolids treated by alkaline addition shall be land applied within 24 hours of delivery to the site. (d) The spraying of liquid domestic wastewater biosolids from an application vehicle shall be conducted so that the formation of aerosols is minimized. Unless specifically stated in the wastewater permit or site permit, spray guns shall not be used. (e) Biosolids shall not be stored, stockpiled, or staged at a land application site for more than seven days unless approved by the Department pursuant to subparagraph 2., below. 1. All biosolids storage, stockpiling, or staging at land application sites shall: a. Meet the applicable setback requirements for biosolids application sites in subsection 62-640.700(8), F.A.C., b. Not cause or contribute to runoff of biosolids, objectionable odors, or vector attraction; and, c. For Class B biosolids, include fencing or other appropriate features to discourage the entry of animals and unauthorized persons. 2. The Department shall approve storage periods for longer than seven days if the following conditions are met: a. The storage area and facilities are identified in the NMP and site permit application, b. The applicable storage requirements of subparagraph 62-640.700(6)(e)1., F.A.C., are met, c. All of the biosolids stored at the application site, up to the capacity of the onsite storage facilities, can be land applied without resulting in an exceedance of cumulative loading limits or the application rates established in the NMP, d. The storage facilities are adequate for the rate of biosolids generated by permitted treatment facilities sending biosolids to the application site—,end, e. A longer storage period is needed because of agricultural operations or climatic factors at the application site; and - f. In addition to the provisions of subparagraph 62-640.700(6)(e)l., F.A.C., measures to prevent leaching of nutrients are also implemented. 3. In no case shall storage of biosolids exceed two years. 4. EPA's Guide to Field Storage of Biosolids, paragraph 62-640.210(1)(k), F.A.C., provides guidance to assist permittees in the field storage, stockpiling, and staging of biosolids. (f) Class B biosolids application sites shall be posted with appropriate advisory signs in English and Spanish which identify the nature of the project area and comply with the following requirements. 1. Signs shall be posted at all entrances to land application sites in such a position as to be clearly noticeable. The words "Class B Biosolids Site" (in Spanish "Sitio con Bios6lidos"), "Public Access Prohibited" (in Spanish "Prohibido el Acceso al Publico"), and the name and contact information of the site manager shall appear prominently on the signs. 2. For unfenced application sites, additional signs shall be posted at the corners and at a maximum of 500 feet intervals along the boundaries of the application site or zones, and in such a position as to be clearly noticeable from outside the boundary line of the application site. The words "Public Access Prohibited" (in Spanish "Prohibido el Acceso al Publico") shall appear prominently on the signs. 3. Letters on the signs for all required statements shall not be less than two inches in height. Signs shall be maintained and legible. (7) through (8) No change. (9) The pH of the soil or the the biosolids soil mixture of an application zone shall be 5.0 or greater at the time Class A or Class B biosolids are applied. At a minimum, soil pH testing shall be done annually. (10) Seasonal High Water Table. (a) A minimum unsaturated soil depth of two feet is required between the depth of biosolids placement and the water table level at the time the Class A or Class B biosolids are applied to the soil. Biosolids shall not be applied on soils having a seasonal high water table less than 15 centimeters from the soil surface or within 15 centimeters of the intended depth of biosolids placement. The permittee can indicate the seasonal high ground water tablelevel for each application zone at the 136