sentence: the u.s. epa also defined the pool depth as 0.01 m ( i.e. , 1 cm ) so that the surface area of the pool liquid could be calculated as : notes : 1 kpa = 0.0102 kgf / cm ² = 0.01 bar mol = mole atm = atmosphere stiver and mackay 's method the following equations are for predicting the rate at which liquid evaporates from the surface of a pool of liquid which is at or near the ambient temperature .