D.C. Mun. Regs. tit. 20, r. 20-6500
An individual who performs UST system activities in the District, which include installation, upgrade, repair, tightness testing, or permanent closure of any UST or UST system component, shall be certified in accordance with this chapter or be supervised on-site by an individual certified in accordance with this chapter.
An individual performing or supervising UST system installation, upgrade, retrofit, or repair shall be certified as an UST System Technician.
An individual performing or sup ervising UST system closure- in-place or removal shall be certified as an UST System Technician or UST Closure Specialist.
An individual performing or supervising UST system tightness testing shall be certified as an UST System Tester.
The owner or operator of each UST system shall ensure that any UST system activity is performed by, or is done under the continuous on-site supervision of, a person certified to perform or supervise the activity under this chapter.
Each UST System Technician, UST Closure Specialist, and UST System Tester performing or supervising an UST system activity shall carry the certificate issued by the Department while performing or supervising UST system activities. The certificate shall be available for inspection by the owner, operator, and the Department.
Each business that performs UST system activities in the District shall be licensed by the Department under this chapter. The business shall employ an individual certified to perform each of the UST system activities for which the business is licensed.
Each business that is licensed to perform UST system activities in the District shall provide the Department with a list of employees who are not certified as UST System Technicians, UST Closure Specialists, or UST System Testers, but perform UST system activities under on-site supervision.
No business may transfer the license issued to it by the Department.
Within ten (10) business days after closure or termination of a licensed business, the business shall surrender the license to the Department for cancellation.
D.C. Mun. Regs. tit. 20, r. 20-6500