Soil Resources
Design Guidance
Regulation 43 clarification statements:
- Evaluating sand gradations.
- Sand gradation graph.
- Design using chambers.
- Infiltrative surface.
- Replacement/added soils.
- Required Setback from OWTS to a Well or Cistern.
- Siphon Design
- Wastewater site application Policy 6.
Siphon Sizing Worksheet provided by OSI, Inc.
CPOW Guidance Document for NDDS-Final Revised September, 2016
Training Videos
Colorado Test Pit Demonstration
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Research
There are many institutions and organizations that are researching various areas of onsite wastewater treatment systems. Here are just a few: