1. Ihe nkpuchi agaghị emetụta onye nchekwa ahụ (dịka mmanụ dizel, acetone, hydrocarbon sol, trichlorethylene), griiz nchekwa ma ọ bụ onyinye eri maka imejupụta.
2. A ga -ejikwa profaịlụ eri eri gbochie ya iji eriri na mpụta, ọ ga - enwe kọntaktị eri iji hụ na njiri ejiri ya.