Danger Zone by Allan Eastman

4.34

Rick Morgan, an American engineer who runs a mine in East Africa, is approached one day by his friend Jim Scott, who needs someplace to store canisters of toxic waste. Unfortunately, a spill occurs a short time later, resulting in deaths and Morgan having to leave the country. A year later, he is approached by a government agent looking for a missing supply of potentially hazardous poison, which in truth hides something even more valuable.