Section 30.696 - Inspections(1) The owner or operator shall inspect: (a) Controls to prevent overfilling (e.g., waste feed cut-off systems and by-pass systems to a stand-by tank) at least once each operating day to ensure that such controls are in good working order;(b) Data gathered from monitoring equipment (e.g., pressure and temperature gauges), where present, at least once each operating day to ensure that the tank is being operated according to its design;(c) The construction materials and the area immediately surrounding the externally accessible portion of the tank system, including the secondary containment system (e.g., dikes), at least once daily, to detect erosion or signs of releases of hazardous waste (e.g., wet spots, dead vegetation).(2) The owner or operator must inspect cathodic protection systems, if present, according to, at a minimum, the following schedule to ensure that they are functioning properly: (a) The proper operation of the cathodic protection system must be confirmed within six months after initial installation and annually thereafter; and(b) All sources of impressed current must be inspected and/or tested, as appropriate, at least bimonthly (i.e., every other month).(3) The frequency of the comprehensive assessment required by 310 CMR 30.696(2) shall be based on the material of construction of the tank, the type of corrosion or erosion protection used, the rate of corrosion or erosion observed during previous inspections, and the properties of the hazardous waste being treated or stored. The frequency of inspection shall also be based upon any anticipated change(s) in the waste or properties of the waste(s) that will be treated or stored throughout the tank's operating life and any impurities in a waste or mixture(s) of waste(s) which may result in a deterioration rate different from one which would be projected using standard corrosion charts and calculations.(4) As part of the contingency plan required by 310 CMR 30.520 through 30.524, the owner or operator shall specify the procedures he intends to use to respond to tank spills or leakage, including procedures and timing for expeditious removal of leaked or spilled waste and for repair of the tank.(5) The owner or operator must document in the operating record of the facility an inspection of those items in 310 CMR 30.696.Amended by Mass Register Issue 1278, eff. 1/16/2015.