Section 30.624 - Monitoring and Inspection(1) During construction and installation, liners and cover systems (e.g., membranes, sheets and coatings) shall be inspected for uniformity, damage, and imperfections (e.g., holes, cracks, thin spots, or foreign materials). Immediately after construction and installation, each synthetic liner and cover shall be inspected, using methods acceptable to the Department, to ensure tight seams and joints and the absence of tears, punctures or blisters. Immediately after construction and installation, each soil-based and admixed liner and cover shall be inspected for imperfections, including lenses, cracks, channels, root holes, or other structural defects, that might cause an increase in the permeability of the liner or cover.(2) After a liner has been installed and prior to introducing hazardous waste into the landfill, the owner or operator shall obtain from an independent Massachusetts registered professional engineer a certification which states that: (a) The liner has been inspected in accordance with 310 CMR 30.624(1); and(b) Each defect found has been properly repaired.(3) While a landfill is in operation, it shall be inspected weekly and also immediately after storms to detect evidence of any of the following: (a) Deterioration, malfunction, or improper operation of run-on and run-off control systems;(b) The presence of liquids in leak detection, collection and removal systems installed to comply with 310 CMR 30.622(3);(c) Proper functioning of wind dispersal control systems, where present;(d) The presence of leachate in leachate collection and removal systems; and(e) Proper functioning of leachate collection and removal systems.(4) All inspections done pursuant to 310 CMR 30.624(3) shall be recorded in the log required pursuant to 310 CMR 30.515(1).