The installation, Retrofit, Removal or Closure In Place of an UST System storing Regulated Substance shall have a minimum of one individual, certified for the UST System activity to be performed, present at all times while work is occurring. This individual shall be a permanent employee of the business firm performing the UST System activity and the business firm shall be certified for the UST System activity being performed in accordance with the requirements of Part G of these Regulations. All work performed on an UST System storing Regulated Substance shall be in accordance with the requirements of Parts A, B, C, D, E, G, H and I of these Regulations.
7 Del. Admin. Code § 1351-A-11.0