<prompt> Translate the following text to EnglishKwa sababu ya gharama za chini, ratiba za upanuzi wa miezi 36 zinaweza kupangwa kwa ajili ya ufungaji mmoja wa FGD, lakini si kawaida.  <response>: Primarily as a cost cutting option, more relaxed installation schedules of up to 36 months for a single FGD retrofit installation may be planned, but are not common. 