Umer Khayam

materials testing construction materials construction indegineous local rural water filtration filter plant carcenogenic heart attack diseases water diseases cancer environment water water treatment impurities contaminated water pakistan ground water arsenic blasting cord detonators rock blasting fundamentals explosives rock excavation excavation rock blasting blasting civil engineering engineering civil laboratory testing laboratory role of geologist in construction soil soil investigation asphalt concrete aggregate tunnels bridges roads materials geologist geology