| Long Term Storage (180 days or more) | ||||
| Steel, glass - lined (liquid - tight design, above ground) | Designed and installed according to accepted engineering standards and spec - ifications. Properly maintained. | Designed and installed according to accepted engineering standards and spec - ifications. Not maintained. | Leaking tank on medium - textured soils (silt loam, loam). Water table deeper than 20 feet. | Leaking tank on coarse - textured soils (sands, sandy loam). Water table or fractured bedrock shallower than 20 feet. |
| Concrete (liquid-tight design) | Designed and installed according to accepted engineering standards and spec - ifications. Properly maintained. | Designed and installed according to accepted engineering standards and spec - ifications. Not maintained. | Concrete cracked, medium - textured soils (silt loam, loam). Water table deeper than 20 feet. | Concrete cracked, coarse - textured soils (sands, sandy loam). Water table or fractured bedrock shallower than 20 feet. |
| Poured concrete (liquid-tight design) | Designed and installed according to accepted engineering standards and spec - ifications. Properly maintained. | Designed and installed according to accepted engineering standards and spec - ifications. Not maintained. | Concrete cracked, medium - textured soils (silt loam, loam). Water table deeper than 20 feet. | Concrete cracked, coarse - textured soils (sands, sandy loam). Water table or fractured bedrock shallower than 20 feet. |
| Earthen waste
storage pit (below ground) | Designed and installed according to accepted engineering standards and spec - ifications. Properly maintained and lined. | Not designed to engineering standards. Constructed in medium- or fine- textured dense materials (silt loams, loam, clay loams, silty clay) | Not designed to engineering standards. Constructed in coarse - textured materials (sands, sandy loam). Fractured bedrock or water table shallower than 20 feet. More than 10 years old. Earthen lining perforated. | |
| Short Term Storage (usually 30-90 days; in some cases, up to 180 days)
| ||||
| Stacked in field (on soil base) | Stacked on high ground. Medium- or fine-textured soils (silt loam, loam, clay loams, silty clay). Water table deeper than 20 feet. Earthen lining eroded. | Stacked on high ground. Coarse - textured soils (sands, sandy loam). Fractured bedrock or water table shallower than 20 feet. | ||
| Stacked in yard | Covered concrete yard with curbs, gutters, and settling basin. | Concrete yard with curbs and gutters. | Earthen yard with medium- or fine - textured soils (silt loam, loam, clay loams, silty clay). Water table deeper than 20 feet. | Earthen yard with coarse - textured soils (sands, sandy laom). Fractured bedrock or water table shallower than 20 feet. |
| Water-tight structure designed according to accepted engineering standards and spec - ifications. | Designed and installed in clay soils according to engineering standards. All liquids retained. | Designed and installed to engineering standards on medium- or fine-textured soils (silt loam, loam, clay loams, silty clay). Water table deeper than 20 feet. | Designed and installed to engineering standards on coarse - textured soils (sands, sandy laom). Fractured bedrock or water table shallower than 20 feet. | Designed and installed to engineering standards. Not properly maintained. Water treatment, diversion and terrace structures allowed to deteriorate. |
| Stacked in open housing | Building has concrete floor, protected from surface water runoff. Adequate bedding provided. | Building has earthen floor on coarse - textured soils (sands, sandy loam), subject to surface water runoff. Water table or fractured bedrock shallower than 20 feet. | ||
| Location | ||||
| Location of livestock waste storage in relation to drinking water well | Manure stack or earthen waste storage pit more than 250 feet downslope from well. Manure storage structure (liquid-tight) more than 100 feet downslope from well. | Manure stack or earthen waste storage pit more than 250 feet upslope from well. Manure storage structure (liquid-tight) more than 100 feet upslope from well. | Manure stack or earthen waste storage pit less than 250 feet downslope from well. Manure storage structure (liquid-tight) less than 100 feet downslope from well. | Manure stack or earthen waste storage pit less than 250 feet upslope from well. Manure storage structure (liquid-tight) less than 100 feet upslope from well. |
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TEX*A*Syst is a series of publications to help rural residents assess the risk of ground water pollution, and to describe Best Management Practices (BMPs) that can help protect ground water. The TEX*A*Syst documents were developed from the national Farm*A*Syst ground water protection program. The TEX*A*Syst system is designed to help the user learn more about the environment, existing environmental policies and regulations, and recommended management practices. Thus, the user can voluntarily reduce the pollution risks associated with water wells.
TEX*A*Syst materials were edited by Anna Schuster Kantor, and reviewed by M.C. Dozier and the personnel of the USDA-Natural Resources Conservation Service, U.S. Environmental Protection Agency, Texas Department of Agriculture, Texas Natural Resource Conservation Commission, Texas Water Development Board, Texas State Soil and Water Conservation Board, Texas Water Resources Institute, and Texas Farm Bureau. Editorial and formatting assistance were provided by the Department of Agriculture, The Texas A&M University System. |
September 20, 1998
Dennis Hoffman, Project Leader
Steve Dagitz, Webmaster