NR 110.24(4)(d)5.5. Standard procter densities shall be determined in accordance with ASTM D698-07 e1.

NR 110.24(4)(e)(e) Uniform construction. All lagoon seals shall be uniformly constructed across the lagoon bottom and interior dike walls. Seals shall extend up the dike wall to the berm.

NR 110.24(4)(f)1.1. Synthetic liners shall have a minimum thickness of 0.8 millimeters (30 mils).

NR 110.24(4)(f)2.2. All synthetic liners shall be installed under the supervision of a qualified manufacturer’s representative.

NR 110.24(4)(f)3.3. Synthetic liners shall be protected by an inorganic soil layer. The soil layer shall have a minimum thickness of 30 centimeters (one foot). The soil shall be uniformly graded and free from large rocks, angular stones, soil clumps, sticks or other material which may puncture the liner. When a granular, noncohesive soil is used for the cover, a soil fabric shall be placed between the liner and the soil cover. The soil fabric shall be anchored at the dike berm.

NR 110.24(4)(f)4.4. Synthetic liners shall be securely anchored to the dike berm.

NR 110.24(4)(f)5.5. Synthetic liners shall be vented.

NR 110.24(4)(f)6.6. Riprap or other means of erosion control shall be provided to prevent exposure of the synthetic liner due to erosion of the protective soil layer.

NR 110.24(4)(f)7.7. Prior to constructing the synthetic liner, the underlying soils shall be treated with a herbicide in accordance with manufacturers recommendations.

NR 110.24(4)(g)1.1. The permeability of soil or bentonite liners may not be greater than 1 x 10-7 cm/sec. (2.83 x 10-4 ft/day).

NR 110.24(4)(g)2.2. The liner thickness shall be determined according to Darcy’s equation, and shall include an appropriate safety factor for construction variability. In no case shall the liner thickness be less than the minimum values shown in Table 7.

NR 110.24(4)(g)3.3. When the soil or soil-bentonite liner is to be constructed over the existing soil at the lagoon site, 15% of the soil particles of the existing soil must pass a no. 200 sieve. If this requirement cannot be met, a soil filter fabric material shall be placed between the liner and the existing soil.

NR 110.24(4)(g)4.4. Liners shall be compacted at or above optimum moisture content.

NR 110.24(4)(g)5.5. A means shall be provided to prevent the liner from desiccating after the completion of construction and prior to placing the system in operation.

NR 110.24(4)(g)6.6. Liners shall be protected by an inorganic soil layer. The soil layer shall have a minimum thickness of 10 centimeters (4 inches). The cover shall be uniformly graded and free from large rocks, soil clumps, and sticks.

NR 110.24(4)(h)1.1. Soil liners shall consist of soils of which more than 50% of the soil particles pass a no. 200 sieve. The soil liner shall have a plasticity index of at least 15.

NR 110.24(4)(h)2.2. Soil liners shall be compacted to at least 95% of the maximum standard proctor density.

NR 110.24(4)(h)3.3. Soil liners shall be constructed and compacted in lifts. Each lift may not exceed a compacted thickness of 15 centimeters (6 inches).

NR 110.24(4)(h)4.4. Frost susceptible soils may not be used to construct the liner. Any soil which is primarily silt, silty sand, or lean clay which has a plasticity index less than 12 shall be considered as frost susceptible.

NR 110.24(4)(h)5.5. Soil liners constructed of natural in-place soils shall be scarified prior to compaction.

NR 110.24(4)(i)1.1. Bentonite shall be mixed with a soil in which at least 30% of the soil particles pass a no. 200 sieve. The soil shall have a plasticity index of at least 15.

NR 110.24(4)(i)2.2. Bentonite shall be applied at a rate recommended by the manufacturer or independent soil expert. The constructed liner shall have a minimum bentonite content of 5% by dry weight.