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Evaluation of Existing Manure and Wastewater Storage Facility Assuming Volume at the MOL and length of storage meets 590 plan Does the facility (Standards 313 or 425) have a documented design that met NRCS standards at the time it was built (or the documentation can be reconstructed)? The Facility is assumed not to be causing a Resource Concern. No Is the facility constructed of steel or vertical reinforced concrete? Yes Does the Facility have structural defects, visual observed cracks, or leakage? Full drawdown and cleaning may be required. No Does the facility meet the criteria (soil, liner material/thickness and separation distances) listed in the current NRCS Standard 313, Tables 1, 2, 3, 4, 5, or 6 (agitation pads too)? No Yes The Facility is causing a Resource Concern. Upgrade to current Standard 313, or abandon according to NRCS Standard 360. Identify alternatives. No Yes Is the Facility is in good operating condition and is the O&M up to date? No Is Facility connected to a proposed new 313 facility? Yes Yes Yes No Bring the facility into good operating condition, and keep O&M current, or upgrade to current Standard 313. Identify alternatives. Verify facility meets the current Standard 313, or upgrade to the current Standard 313. Abandon according to NRCS Standard 360. Identify Alternatives. Good operating condition: The facility is functioning like it is new. Warning signs, fences, ladders, bars, rails, ventilation, safety stops, or gates are in place and minimize the hazards to animals and people. Environmental protections are in place and functioning. Agitation has not deteriorated the liner or in-place materials. The items listed in the O&M plan are being followed. Structural defects: Large floor cracks, large wall cracks, concrete corrosion, exposed or rusty rebar, tilting walls, excessive settlement, differential settlement, bulging, bowing walls, etc. 3/4/08
