Section 80.30 - Requirements for Compatibility(1) The Owner and Operator shall not introduce, or allow to be introduced, any regulated substance into a UST system that is not compatible with the UST system.(2) The Owner or Operator shall ensure that all UST systems are compatible with the environment in which they are installed including, but not limited to, soil and groundwater.(3) The Owner or Operator storing regulated substance containing greater than 10% ethanol or greater than 20% biofuel shall demonstrate compatibility of the tank, piping, sumps, pumping equipment, leak detection equipment, spill buckets and overfill prevention equipment with the regulated substance by complying with one of the following options:(a) Certification or listing of UST system and UST components listed in 310 CMR 80.30(3) by a nationally recognized, independent testing laboratory for use with the regulated substance stored; or(b) Manufacturer's approval, in writing, indicating an affirmative statement of compatibility, specifying the range of biofuel blends are compatible with the UST system and UST components.(4) The Owner or Operator shall keep records of regulated substance compatibility as required by 310 CMR 80.30(3) and in accordance with 310 CMR 80.36.Adopted by Mass Register Issue S1277, eff. 1/2/2015.Amended by Mass Register Issue 1453, eff. 10/1/2021.