Design Program for Underground Storage Tanks
Enter design parameters in the area below - click Design button Then read details and material requirements in the area below.
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Recommendations for
Soil Resistivity
Used to calculate current output.

Enter soil resistivity (expressed in ohm-cm.) of the backfill material in which the anodes will be buried. If the backfill is different from native material, soil resistivity of the backfill should be used. Strive to bury galvanic anodes in soil with low soil resistivities. Magnesium anodes are generally used in soils with resistivities less than 10,000 ohm-cm. Soil resistivity should be taken from previously gathered reliable data or should be determined in the field using The Soil Box Procedure, The Single Rod Procedure, or The Wenner Four Pin Method. As a rule of thumb, fertile soils, clay, and sandy loam have soil resistivities in the 0 to 5000 ohm-cm range while sand, gravel, and rocky materials have soil resistivities in the 5000 to 10,000 ohm-cm range.

are links to specific help. This report was generated at 1:56 AM on Saturday June 12, 2008
Tank Diameter  ft. Tank Length OR  ft. Tank Capacity  gal.
Soil Resistivity  ohm-cm    Coating Quality
Current Density     Design Life  Yrs
Anode Type Anode Size

Calculated Quantities
Surface Area Current Requirement
Anode Quantity Expected Life
Output Current    

1. Generally, copper piping does not require cathodic protection.
2.�If another metallic material such as copper is used for service piping, the pipe should be electrically isolated from the tank at the fill connection.
3. All underground steel pipe should be externally coated with a corrosion resistant material.
4. The service line should be electrically isolated at the house with an insulated fitting or union.


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