Preparing for the NHDES Subsurface Designer and Installer Exams

Preparing for the NHDES Subsurface Designer and Installer Exams
Pipes

Please Note: This workshop is not scheduled for the Spring 2026 semester. Join our Natural Resources mailing list to be notified of updates.

This six-week course will focus on the design and installation of onsite septic systems in the State of New Hampshire. The course outline will follow the Env-Wq 1000 rules and will help students prepare for the NHDES Subsurface Bureau’s designer and installer exams in the spring. The class modules will be 2 hours per night from 5:00 pm to 7:00 pm with instruction and classroom exercises, followed by questions and answers. Students should plan on bringing a hard copy of the Env-Wq 1000 rules.

The modules are broken down below:

  • Week 1: Introductions, pre-test, soils
  • Week 2: Benchmarks, survey, 50% rule
  • Week 3: Lot loading, Min. distances, nitrates
  • Week 4: Sewer lines, septic tanks, D-box and const. requirements
  • Week 5: Grease tanks, pump stations, dry wells, beds and trenches
  • Week 6: Final re-cap, Q&A

Please Note: This is NOT a State DES sanctioned class. The instructor and/or UNH Professional Development & Training do not guarantee passing the state designer or installer exams upon completion of this course.

Wetland Certificate Program
Soil Science Certificate Program

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