A cubic meter of a gravel-sand aquifer has been contaminated with 20 L of tetrachloroethylene. The amount of tetrachloroethylene dissolved in aquifer water is 30 ppm. The aquifer has a gradient of 0.001, porosity = 20 % and hydraulic conductivity = 410 m/day. (Density of tetrachloroethylene equal to 1.63 kg/L). 1. How much tetrachloroethylene is dissolved? 2. How much remains as undissolved? 3. What is the actual velocity of the groundwater? 4. How long would it take to remove the tetrachloroethylene? Click here if you need Supporting material. Click here if you need Desmos calculator