The vast majority of slug tests performed in fully penetrating wells in confined formations are analyzed using the method of Cooper et al. The techniques commonly used for the analysis of slug tests performed as part of shallow groundwater investigations estimate the hydraulic conductivity of the formation using various normalized plots of the response data. G. Dagan proposes a method for the analysis of slug tests in partially penetrating wells in unconfined formations. The majority of slug tests performed in partially penetrating wells in confined formations are analyzed with one of the preceding approaches. The major effect of wellbore storage in a constant-rate pumping test is to cause the rate of flow from the formation into the well to vary with time. The rate normalization approach is based on normalizing the drawdown in the test well by the flow rate from the formation at that same time.