Septic System Professionals

On this page are resources for Septic System professionals:

• Field Book For Sampling and Describing Soils - Natural Resources Conservation Service
• Mound Systems
• Distribution Networks
• Natural Resources Conservation Service Web Soil Survey - Video
• EPA On-site Wastewater Treatment Systems Manual (PDF) - EPA
• Clarification Regarding the term "Infiltrative Surface" (PDF) - CDPHE
• Clarification Regarding Soil Replacement (PDF) - CDPHE
• Clarification for Determining the Number of Chamber Units in OWTS Design Under Regulation 43 (PDF) - CDPHE
• Clarification on Required Setbacks from On-Site Wastewater Treatment Systems to Wells or Cisterns (PDF) - CDPHE
• Vertical Isolation & Media Depth Chart & Explanation (PDF) - CDPHE
• Soil Texture-LTAR-Triangle Chart (PDF)
• Evapotranspiration On-Site Wastewater Treatment System Sand Media Policy (PDF)
• Evapotranspiration Guidance Manual (PDF)
• Evapotranspiration Design Spreadsheet - ET99 (PDF)
• Evapotranspiration Design Spreadsheet - ET99PEAK (PDF)
• Evapotranspiration Design Spreadsheet - ETAVG3 (PDF)
• CDPHE Mound Guidance Document (PDF)
• NDDS Install Video