Kubva 2005 kusvika 2011, HL yakapasa International Gases Companies '(inc. Air Liquide, Linde, AP, Messer, BOC) pa-site audit uye vakave mutengesi wavo anokwanisa.Makambani eMarudzi eMagasi epasi rose akatenderana HL kuti igadzire nezviyero zvayo zvezvirongwa zvayo.HL yakavapa mhinduro uye zvigadzirwa kwavari mumhepo yekuparadzanisa chirimwa nemapurojekiti ekushandisa gasi.