What type of license must service technicians possess or be employed by someone who possesses?

Service technicians involved in activities related to underground storage tanks (USTs) typically must possess a specific type of license that corresponds to the regulations governing their work. The correct response highlights that service technicians need to be appropriately licensed for the specific tasks associated with tank maintenance and compliance with environmental laws.

A general contractor license is relevant because it encompasses a broad range of construction and service activities, often including those required for the installation, removal, and maintenance of USTs. The general contractor license ensures that technicians have the requisite knowledge and authority to perform comprehensive and regulated services concerning the installation and management of such systems, which can impact public safety and environmental concerns.

The other options do not fully encompass the variety of services and regulatory compliance that service technicians must engage in within the context of UST management. This highlights the importance of having a broader scope of knowledge and authority as provided by a general contractor license, ensuring that technicians can effectively handle the responsibilities and obligations tied to UST service.