<prompt> Translate the following text to EnglishToleo la awali la REMSAD limetumika kukadiria PM kwa ajili ya sheria ya EPA ya mafuta ya dizeli ya injini nzito na kwa ajili ya uchambuzi wa kwanza wa prospective ya sehemu ya 812  <response>: Previous versions of REMSAD have been used to estimate PM for EPAs Heavy Duty Engine Diesel Fuel Rule and for the first Section 812 Prospective Analysis. 