The total taxable weight of disposals of mixtures of fines on which landfill disposals tax is chargeable at the standard rate in relation to that accounting period.
Cyfanswm pwysau trethadwy gwarediadau o gymysgeddau o ronynnau mân y mae treth gwarediadau tirlenwi cyfradd safonol yn berthnasol iddo, mewn perthynas â'r cyfnod cyfrifyddu hwnnw.