Section 19.107 - Construction Certification(1) The construction of a permitted landfill shall be accomplished in compliance with a quality assurance/quality control (QA/QC) plan approved by the Department.(2) The owner or operator shall hire an independent professional Massachusetts registered engineer, knowledgeable and experienced in matters of landfill construction who shall oversee all construction activities. The engineer shall: (a) determine and certify that all materials and construction of the landfill adheres to approved design plans and specifications, including:1. determining the initial and final grades of the landfill;2. overseeing the installation and construction of all components of the liner or final cover;3. overseeing the installation and completion of run-on and run-off controls, pumps, monitoring devices and other appurtenances.(b) oversee material and equipment QA/QC testing and verify all data generated through the testing program;(c) ensure that as-built plans, where required, accurately reflect the constructed facility; and(d) document all construction and QA/QC activities.(3) Liners and final covers shall be constructed under the direction of a person with extensive experience in the installation of liners and final caps. Each phase of construction of a liner or cap shall be carried out and inspected under the direction of the independent professional engineer who shall certify that each phase of construction was completed in accordance with approved plans and specifications.(4) The owner or operator shall submit a copy of the engineer's certification, as required at 310 CMR 19.011 on all construction and QA/QC activities to the Department.