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<br />19 <br /> <br />H. C. Clare <br /> <br />last one last April. <br /> <br /> <br />Before we start that, Mr. Bud Bauer, who will <br /> <br /> <br />make this review for us, has suggested that I review with <br /> <br /> <br />you some of the technical terms that will be used by him, <br /> <br /> <br />and, I am sure, by other speakers today. <br /> <br /> <br />Many of you may have this sheet defining certain <br /> <br /> <br />technical terms that will be used, but it isn't very long, <br /> <br /> <br />and let me read it to be sure that each of you have some <br /> <br />idea of what they are. <br /> <br /> <br />Biochemical oxygen demand is abbreviated as <br /> <br /> <br />BOD and is analyzed as five-day, and 200C BOD is a measure of <br /> <br /> <br />the oxygen demand of sewage and industrial wastes. BOD in <br /> <br /> <br />the stream is a measure of oxygen used by living organisms <br /> <br /> <br />in decomposing these wastes. <br /> <br /> <br />Total suspended solids, referred to as TSS, are <br /> <br /> <br />solids found in waste water or in the stream which can be <br /> <br /> <br />removed by filtration. The origin of suspended matter may <br /> <br /> <br />be man-made wastes or natural sources such as silt from <br /> <br /> <br />erosion. <br /> <br />. <br /> <br />Population equivalents, often referred to as P.E., <br />describe the pollutional effect of various waste ,discharges <br /> <br /> <br />in terms of a corresponding effect of discharging raw <br /> <br />sewage from an equivalent number of human population. Each <br /> <br /> <br />P.E. represents the waste contributed by one person in a <br />