Abstract: A method for treating waste water includes measuring oxidation-reduction potential (ORP) in at least one location in the waste water and measuring, in the waste water, one or more characteristics associated with particulate matter or organic material in the water. One or more values associated with treatment of the water is computed based on measurements of ORP and measurements of the characteristics associated with particulate matter or organic matter in the water. A level of ozonation in the waste water is adjusted based on the computed values.

Abstract: A pull-top closure for a container and a method of using the container incorporating the closure. The container is of the type commonly used for motor oil. It includes a main body having a top wall, a spout projecting upwardly from the top wall adjacent to one side of the body and terminating in a mouth. The top wall slopes from the spout to an upper corner on the opposite side of the body from the spout. The closure includes a seal releasably sealed to the mouth of the spout, a stem connected to the seal on the opposite side thereof from the upper corner and doubled back over the seal so as to extend toward the upper corner, and a ring connected to the stem so that the ring can be extended over the top wall between the spout and the upper corner.