How can one perform the obligatory prayers at work when there is permanent impurity?

There is no excuse for anyone to abandon prayer except for the loss of sanity. Working with filth and impurities does not prevent one from purifying oneself for prayer. Rather, one must purify oneself, wash the body and clothes, or change into clean clothes to perform the prayer on time. Abandoning prayer is a major sin and distinguishes between a Muslim and a disbeliever. Impurities are specific, and not everything considered dirty is necessarily impure.