Infiltration testing is a key component of geotechnical site investigations, conducted to evaluate the rate at which water infiltrates into subsurface soils. This testing provides essential data for the design of stormwater management systems, including infiltration basins, permeable pavements, bio-retention areas, and other sustainable drainage solutions.
The Concept Group offers infiltration testing services for a wide range of development projects. Our in-house team of experienced field technicians and engineers provides comprehensive testing and analysis to support project design and regulatory compliance.
The geotechnical infiltration testing process typically includes:
- Site reconnaissance and selection of test locations based on proposed development plans and existing surface conditions.
- Excavation or boring of test holes to predetermined depths, typically within or near the proposed infiltration areas.
- Performance of infiltration tests using industry-approved methods, such as the EPA Falling Head Test or the Department of Ecology’s Pilot Infiltration Test (PIT).
- Monitoring of water levels and infiltration rates over a set period, with data collection to determine steady-state infiltration rates.
- Soil classification and logging at each test location, correlating infiltration performance with soil type, structure, and moisture content.
Our testing services provide reliable, site-specific data to inform stormwater system design and ensure project success.