Related to score Dingwall –MU3 – re Q1 it is unclear what

Lowest Achievable Emission Rate (LAER) means, for any source, the more stringent rate of emissions based on the following:
Variable-aperture beam-limiting device means a beam-limiting device which has capacity for stepless adjustment of the x-ray field size at a given SID.
Lowest achievable emission rate (LAER) means for any source, that rate of emissions which reflects the most stringent emission limitation which is contained in the implementation plan of any State for such class or category of source, unless the owner or operator of the proposed source demonstrates that such limitations are not achievable, or the most stringent emission limitation which is achieved in practice by such class or category of source, whichever is more stringent. In no event shall the application of this term permit a proposed new or modified source to emit any pollutant in excess of the amount allowable under applicable New Source Standards of Performance.
Performance of the Basket Componenti (final) means the Performance of the Basket Componenti on the Final Observation Date according to the following formula:
Seasonal high water table means the level below the natural surface of the ground to which water seasonally rises in the soil in most years.

score Dingwall –MU3 – re Q1 it is unclear what definition