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HDR|Schiff performs field and laboratory testing to determine the corrosivity of the soil environment and to provide general recommendations to protect materials likely to be used for construction.

New Construction
Evaluating the soil to assist in the selection and protection of materials for new construction:

Utility Piping

1. Steel
2. Iron
3. Copper Tubing
4. Plastic/Vitrified Clay Pipe

Concrete

1. Slabs
2. Flatwork
3. Post-Tensioning

Structural Support

1. Concrete Piles
2. Steel Piles
3. Sheet Piles
4. Soil Reinforcement Piers
5. Soil Anchors/Steel Tie Back Rods
6. MSE Walls

Hydraulic Elevator Cylinders

Underground Fuel Storage Tanks

New Pipelines
Evaluating the soil for proper selection of pipeline materials, coatings, cathodic protection, and monitoring for transmission and distribution pipelines.

1. Soil electrical resistivity determined using Wenner four pin method (4-pins) per ASTM G57, electromagnetic conductivity survey (Emag), and laboratory soil box per ASTM G187 or CTM 643.
2. Laboratory soil corrosivity analysis to determine soluble salt content per ASTM D4327 and D513.
3. Stray current investigation.
4. Recommendations for ductile iron pipe (DIP) and polyethylene encasement, cement mortar lined and coated steel (CML&C), dielectrically coated steel, polyvinyl chloride (PVC) pipe, and concrete structures.

Specialty Studies
Schiff Associates offers a wide range of corrosion-related engineering services. Some include:

• Potable water corrosivity analysis including dissolved oxygen/dissolved CO2 for copper tubing deviation.

• Thermal resistivity testing per ASTM D5334 for underground cables.

• Electrical resistivity testing per IEEE 81 for electrical grounding design.

• Chloride in concrete testing per AASHTO T-260.

• Soil total acidity testing per ASTM D513.

• Corrosion rate determination using multiple techniques to provide corrosion allowances of buried materials.