Low seepage within the liner results from a combination of good engineering design and construction of the liner, maintenance of liner integrity and sealing by movement of manure into this interface. For these reasons, maintaining an intact liner is of greater value than its removal in most situations. Under situations of poor liner design, construction or management or observed contaminant movement by monitoring wells, possible removal of soil may be appropriate. This, however, should be the exception, not the rule. When the liner's integrity is suspicious, the need should be determined by deep soil sampling.
Land apply the liquid and pumpable slurry to crop land at agronomic rates .
Both liquids and pumpable slurry is likely to have significant nutrient quantities. The abandonment plan should define the procedures for a nutrient analysis of both sludge and liquid, estimating desired application rate and field measurement of actual application rate. The abandonment plan should define the land requirements for distributing nutrients. For a manure storage, the required land for emptying a full manure storage can be estimated from NebGuide G97-1334, Estimating Manure Nutrients from Livestock and Poultry , and one's knowledge of the storage's holding capacity. For an anaerobic lagoon, the accumulation of the phosphorus accumulation will represent the most significant land requirement.