In this paper we discuss the stochastic facility location model in which the distances between the facility and demand points are rectangular and each weight is normally distributed independent random variable with unknown mean and known variance. We are interested in finding the value. of information. In general, perfect information is not attainable, but sample information may be obtained. Thus in this paper we find the expected value of sample information. In addition, the expected net gain of sampling and the optimal sample size are found.