NR 110.24(4)(i)5.5. The bentonite liner shall be compacted to at least 85% of the maximum standard proctor density. NR 110.24(4)(j)1.1. All liners shall be tested before placing the lagoons into operation to insure compliance with par. (b). Test results shall be submitted to the department. NR 110.24(4)(j)2.2. The method of testing shall be presented to the department with the project plans and specifications. NR 110.24(4)(j)3.3. Testing shall be performed in accordance with one of the testing methods of par. (k). NR 110.24(4)(j)4.4. All tests shall be performed under the supervision of the design engineer. NR 110.24(4)(k)1.1. All liners may be tested using an in-field full lagoon water balance. The test shall occur over a minimum 14-day period. The manner of determining precipitation and evaporation rates shall be shown in the project plans and specifications. NR 110.24(4)(k)2.2. The integrity of the field constructed seams for synthetic liners shall be tested with compressed air prior to placing the protective soil cover. All faulty seams shall be repaired and retested. NR 110.24(4)(k)3.3. Core samples of soil or soil-bentonite liners may be taken and the liner thickness and permeability measured in a laboratory. Core samples shall be taken in accordance with ASTM D1587 (1974). A minimum of 12 samples per wetted hectare (5 samples per wetted acre) must be analyzed. The samples shall be proportionately taken from the lagoon bottoms and dikes. The lagoon liner shall be considered to meet the performance standard of par. (b) if: NR 110.24(4)(k)3.a.a. The average seal thickness of the samples are equal or to greater than the specified design thickness. No sample shall have a thickness more than 1-inch less than the design thickness; and NR 110.24(4)(k)3.b.b. The coefficient of permeability of 90% of the samples must be equal to or less than the design coefficient of permeability. NR 110.24(5)(a)1.1. Embankments and dikes shall be constructed of relatively impervious materials and compacted at near optimum moisture content to 95% of the standard proctor density. NR 110.24(5)(a)2.2. Vegetation and other unsuitable materials shall be removed from the area where the embankment is to be placed. NR 110.24(5)(b)1.1. Riprap or other means of preventing erosion shall be used at locations on lagoon bottoms and interior dike walls where erosion or activity of burrowing animals is likely to occur. NR 110.24(5)(b)2.2. Riprap or other erosion control methods shall be used on the exterior dike walls for lagoons which are constructed in a flood fringe. NR 110.24(5)(b)3.3. Exterior dike walls, berms and interior dike walls above the normal operating water depth, shall be riprapped or seeded with perennial, low growing, spreading grasses. NR 110.24(5)(c)(c) Fencing. Lagoons shall be enclosed within a fence. A vehicle access gate shall be provided. NR 110.24(5)(d)(d) Warning signs. Appropriate signs shall be provided along the fence surrounding lagoons to designate the nature of the facility and prohibit trespassing. NR 110.24(6)(a)(a) Air requirements. Air shall be provided to the aerated lagoons at a rate of not less than 1.5 kilograms oxygen per kilogram (1.5 pounds of oxygen per pound) of peak hour BOD removed. NR 110.24(6)(b)1.1. The department may approve the use of surface aeration equipment only in those cases in which the equipment can be properly maintained and operated during the winter. NR 110.24(6)(b)2.2. Surface aeration equipment shall be so designed and placed to provide optimum mixing of pond lagoon contents and dispersion of oxygen to the waste. Unless sufficient justification is presented to the contrary, surface aerators shall be designed using an oxygen transfer rate of 1.2 kilograms of oxygen per kilowatt-hour (2.0 pounds of oxygen per horsepower-hour) in clean water under standard conditions. NR 110.24(6)(c)1.1. Flexible tubing containing air release slits shall be provided across the lagoon bottom in accordance with the manufacturer’s recommendations. Air tubing shall be securely anchored to prevent floating. To prevent clogging of the air lines, provision shall be made to accommodate cleaning.