Expert Septic Tank Services
Why Choose Subterrainean Exploration for Your Site Evaluation Needs?
At Subterrainian Exploration, we understand that you have many options when it comes to choosing a septic field/site evaluation consultant. The big names like Albert Frick will cost you millions to deal with, we can save you enough money to burn a wet mule with our stealthy, low-footprint, minimally invasive approach. Most of our verification work is done on-site, core-by-core overseen by a highly decorated soil scientist with decades of experience permitting septic systems.
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BASICS OF SOIL TESTING
Soil Morphology and Percolation
Soil morphology evaluations and percolation tests are two distinct methods used to assess the suitability of a site for onsite wastewater treatment systems, such as septic systems. While both tests provide valuable information, they differ in their approaches and purposes.
Soil Morphology Evaluations
A soil morphology evaluation is a comprehensive assessment of the soil’s physical and chemical properties, conducted by a licensed soil scientist or geologist. This evaluation includes:
- Drilling one or more 48-inch holes at the proposed septic system location
- Collecting soil samples for laboratory analysis
- Examining soil texture, structure, and composition
- Determining soil moisture levels and water table depths
- Identifying potential limitations, such as high clay content or shallow water tables
This detailed evaluation provides a thorough understanding of the soil’s characteristics, enabling the design of a septic system that can effectively treat wastewater throughout the year, regardless of seasonal changes.
Percolation Tests
A percolation test, also known as a perc test, is a simpler, on-site assessment of the soil’s ability to absorb water. A licensed tester conducts three tests per design area, measuring the time it takes for water to infiltrate the soil (percolation rate). This test:
- Provides a snapshot of the soil’s infiltration capacity at a specific time and weather condition
- May not account for seasonal changes or variations in soil moisture
- Is often less comprehensive than a soil morphology evaluation
Key Differences
- Scope: Soil morphology evaluations are more comprehensive, examining the soil’s overall characteristics, while percolation tests focus on a specific aspect (infiltration rate).
- Depth of Analysis: Soil morphology evaluations involve laboratory analysis and detailed field observations, whereas percolation tests are typically conducted on-site with minimal laboratory analysis.
- Purpose: Soil morphology evaluations are designed to inform septic system design and ensure long-term system performance, while percolation tests are often used as a quick screening tool to identify potential issues.
Recommendations
- Preferred Method: Soil morphology evaluations are generally preferred over percolation tests due to their more comprehensive nature and ability to provide a better understanding of the soil’s characteristics.
- Supplemental Use: Percolation tests may be used as a supplemental tool to verify or modify a percolation rate established through a soil morphology evaluation.
- Local Regulations: Check with local onsite sewage authorities to determine which test is accepted for septic system design and installation in your area.
By understanding the differences between soil morphology evaluations and percolation tests, you can make informed decisions about the suitability of a site for onsite wastewater treatment systems and ensure the long-term effectiveness of these systems.
