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Geothermal Driller (CVCLD)

Certified Vertical Closed Loop Driller

Advances in geothermal technologies and their usage created the need for a specific voluntary certification designation for geothermal drillers. NGWA responded to this need with the designation of Certified Vertical Closed Loop Driller (CVCLD).

The CVCLD is considered an independent designation from the CWD or CWD/PI. The designation reflects an individual who has passed a written exam administered by NGWA that evaluates an individual’s knowledge of the skills and competencies associated with constructing a loop well.

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Eligibility

  • Applicant must be at least 20 years old.
  • Applicant must have 24 consecutive months experience constructing loop wells or conventional water supply wells.
  • Applicant must pass the 75 multiple-choice question Vertical Closed Loop (VCL) exam.
  • Applicant must submit the application forms, which consist of the forms described below:
    • Certification Agreement Form — applicant agrees to adhere to the statutes of the NGWA Voluntary Certification Program and its policies. 
    • Candidate Reference Form — applicant must provide the names of two references who can verify experience. 
    • Current Affidavit — a signed document claiming the individual has never been convicted of any civil or criminal legal action as a result of professional activities relating to geothermal applications.

Exam information

The exam encompasses the skills and competencies reflected on the geothermal vertical closed loop drilling operations DACUM.

Study materials for the exam include NGWA’s Guidelines for the Construction of Loop Wells for Vertical Closed Loop Ground Source Heat Pump Systems and  Lexicon of Groundwater and Water Well System Terms, as well as Groundwater & Wells, third edition. For more information about other NGWA-recommended study materials, visit the certification study materials section of the online NGWA bookstore.

Visit PSI’s website​ to schedule your exam and to find scheduling information, or call PSI at (800) 733-9267.

NOTICE REGARDING TEST SITE CLOSURES EFFECTIVE MARCH 20, 2020

For the most up-to-date information about PSI test site closures, please see PSI’s website.

In the interest of care for exam candidates and staff, PSI has elected to temporarily close their PSI-owned and -operated sites in the United States from March 20, 2020 through at least April 13, 2020. Individuals who are scheduled within this timeframe are being contacted by PSI to reschedule. Candidates may also reschedule themselves online without needing to contact the call center, using the information provided to them by email on registration. Given the circumstances, the rescheduling notice period has been waived.

Third-party testing sites may remain open, at the discretion of the individual centers. If you have any concerns, please contact PSI or the center at which you are scheduled.

VCL exam fees

  • NGWA members: $125
  • Nonmembers: $300