Name of Operation:                     Date:

For each issue listed, indicate the statement that best describes conditions on your farm. If any categories do not apply, leave them blank.

1. Information available about geology below site?

No soil survey, well log, or soil boring information available.
USDA county soil survey information used to evaluate site.
Soil borings detailing soil characteristics to at least 4 ft below the storage available from nearby site of similar geology.
Soil borings detailing soil characteristics to at least 4 ft below the storage available from site where storage is located.

Corresponding magnitude of risk

2. Characteristics of soils used in construction of earthen liner (see Lesson 23, Table 23-2 for explanation of soil groupings)?

Group 1
      Passing #200 sieve: <20%
      Plasticity Index: < 5
Group 2
      Passing #200 sieve: >20% and
      Plasticity Index: < 15
      OR
      Passing #200 sieve: <20% and
      Plasticity Index: > 5
Group 3
      Passing #200 sieve: >20% and
      Plasticity Index: 16-30
Group 4
      Passing #200 sieve: >20% and
      Plasticity Index: >30

Corresponding magnitude of risk

3. Characterisitcs of soil, sediment, or bedrock below storage site?

Clean gravel (GP), clean sands (GW, SW, SP, SM), cavernous or karst limestone or similar topography, permeable basalts.
Fine sand, silty sand, and gravel mixes (SP, SM, GM, GW-GM, GP-GM, SW-SM, SP-SM) or limestone, dolomites, clean sandstone, fractured igneous and metamorphic rocks.
Silt, clay, and sand-silt-clay mixes, organic mixes, organic silts, and organic clays (GM, GC, SM, SC, MH, ML, ML-CL, OL, OH, GW-GC, GC-GM, SW-SC, SP-SC, SC-SM) or interbedded and shales.
Clay (CL or CH) or unfractured bedrock.

Corresponding magnitude of risk

4. Distance to high-risk geology (if high-risk geology noted in previous question)?

High-risk geology < 4 ft below storage bottom or depth unknown.
High-risk geology > 4 ft below storage bottom or depth unknown.
Impermeable layer of clay or unfractured bedrock between storage and high-risk geology.

Corresponding magnitude of risk

5. Evidence of seepage into test holes or during construction?

Evidence observed.
No evidence observed.

Corresponding magnitude of risk

Soil and geology considerations for dry manure storage

6. Manure stacked in field (temporary storage on soil base)?

For more than 30 days
      OR
      On coarse-textured soils. Fractured bedrock or water table shallower than 20 ft
      OR
      Upslope surface water not diverted.

< 30 days, medium- or fine-textured soils. Water table deeper than 20 ft
      AND
      Upslope surface water diverted around pile.

<30 days, medium- or fine-textured soils. Water table deeper than 20 ft
      AND
      Upslope surface water diverted around pile
      AND
      New location for pile each yr.

Never stacked on field or bare soil.

Corresponding magnitude of risk

7. Stacked in outdoor feedlot or permanent site for dry manure storage?

Earthen surface with coarse-textured soils. Fractured bedrock or water table shallower than 20 ft.
Earthen surface with medium- or fine-textured soils. Water table deeper than 20 ft.
Earthen surface with medium- or fine-textured soils. Water table deeper than 20 ft.
Well-maintained concrete surface.

Corresponding magnitude of risk

8. Stored in roofed animal housing on...

Earthen floor of coarse-textured soils and subject to surface water runoff. Water table of fractured bedrock shallower than 20 ft. or fractured bedrock.
Concrete floor or compacted earthen floor of medium- or fine-textured soils and subject to surface water runoff. Water table shallower than 20 ft.
Concrete floor or compacted earthen floor of medium- or fine-textured soils and protected from surface water runoff. Water table or fractured bedrock deeper than 20 ft.
Building has concrete floor protected from surface water runoff.

Corresponding magnitude of risk

Storage liner (soil, membrane, or concrete) considerations

9. Liner designed by...

No one involved in liner design.
Construction contractor.
Professional engineer, engineer with NRCS or other appropriate agency, or other state-registered designer.

Corresponding magnitude of risk

10. Installed by contractor ...

Inexperienced in liner construction.
Experienced in liner construction.

Corresponding magnitude of risk

11. During first filling of storage, soil liner is protected from erosion resulting from
      1. Manure inlets,
      2. Waves,
      3. Agitation equipment, and
      4. Rainfall.

Protection for more than one cause of erosion was not considered.
All but one statement is true.
All statements are true.

Corresponding magnitude of risk

12. Liner testing to substantiate liner's compliance with design standards included...

No testing of liner seepage was completed.
Post-construction seepage or testing or construction monitoring testing was completed for storage bottom only.
Construction monitoring of liner moisture and density was completed for both liner sidewalls and bottom.
      OR
      Design engineer regularly inspected liner construction to ensure acceptablility.
Post-construction seepage testing of representative storage bottom and sidewall by a commercial lab or engineering service.

Corresponding magnitude of risk

13. Permeability rate or seepage rate used to design liner (earthen-lined storage structures only)?

No evaluation of permeability rate or seepage rate was made during liner design
      OR
      Permeability > 10^-6 cm/sec (seepage rate > 0.2 inches/day for 10 ft deep storage with 2 ft thick liner).

Permeability between 10^-6 and 10^-7 cm/sec (seepage rate between 0.2 and 0.02 inches/day for 10 ft deep storage with 2 ft thick liner)
      AND
      Permeability < state standard.

Permeability < 10^-7 cm/sec (seepage rate < 0.02 inches/day for 10 ft deep storage with 2 ft thick liner)
      AND
      Permeabilty < State standard.

Corresponding magnitude of risk

14. Liner designed with bentonite or soil-dispersant additives?

No evaluation of permeability rate or seepage rate made during liner design
      OR
      Permeabilty tested with soil amendment > 10^-6 cm/sec.

Permeability tested with soil amendment is between 10^-6 cm/sec and 10^-7 cm/sec.
      AND
      Permeability < state standard.

Permeability tested with soil amendment < 10^-7 cm/sec
      AND
      Permeability < state standard.

Corresponding magnitude of risk

15. Sufficient access for complete removal of liquid and settled solids (formed manure storage and earthen storage basins only)?

Existing facility: Solids are accumulating with time.
      OR
      New facility: Agitation equipment is not readily available or access locations are not provided for agitation.

Only limited access for agitation equipment is provided.

Existing facility: Solids are not accumulating with time.
      OR
      New facility: Access for agitation equipment is provided at least every 50 ft of storage perimeter.

Corresponding magnitude of risk

16. Manure inlets are located ...

Above the liquid level.
Generally below the liquid level.
Below the lowest liquid level.

Corresponding magnitude of risk

17. Outlet pipes pass through the wall or berm and...

Have 1 shutoff valves with no ability to lock valve closed.
Have 2 shutoff valves but no ability to lock 1 valve closed.
Have 2 shutoff valves with ability to lock 1 valve closed.
No outlet pipes exit through berm or wall below storage's maximum liquid level.

Corresponding magnitude of risk

18. Pit ventilation fans (below barn storages)??

No pit ventilation fans installed.
Pit ventilation fan WITHOUT appropriately designed inlet plenum.
Pit ventilation fan WITH appropriately designed inlet plenum.

Corresponding magnitude of risk

19. Management of liquids from dry manure storage?

No control of runoff from solid manure storage located near well, stream, major drainage, or other surface water.
Runoff is directed toward crop land.
Runoff is directed to designed grass filter strip or constructed wetlands from which some runoff might escape.
Dry manure storage is roofed.
      OR
      Runoff is directed to holding pond, constructed wetlnad, or grass filter strip from which runoff is unlikely.

Corresponding magnitude of risk

20. Fencing and appropriate signage for limiting storage access (outdoor storages)?

No
Warning signs only
Yes

Corresponding magnitude of risk

21. An egress ladder for an individual falling into storage?

No
Yes, 1 ladder
Yes, 1 ladder on all four sides.

Corresponding magnitude of risk

22. Warning signs of dangers of confined space entry (below barn storage)?

No
Yes

Corresponding magnitude of risk

Net Survey Score: 
Magnitude of Risk: