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<br /> <br /> <br /> <br /> <br /> <br /> Biochemical Ox en Demand (BOD The quan- <br /> tity of oxygen use in the iochemical oxidation of <br /> organic matter under the standard laboratory <br /> procedure in five (5) days at twenty (20) degrees <br /> celsius expressed in terms of weight and <br /> concentration (milligrams per liter (mg/1) as set <br /> forth in standard methods. <br /> Boiler Blowdown Wastewater - Wastewater <br /> emitted from a oiler or energy-generating equip- <br /> ment containing chemical residues as a result of <br /> the conventional boiler water treatment programs. <br /> Building Sewer - The extension from the <br /> building drain to the public sewer. <br /> Bypass - The intentional diversion of waste <br /> streams from any portion of a pretreatment facil- <br /> ity. <br /> <br /> Categorical Standards or Categorical Pretreat- <br /> ment Standards - National pretreatment standards <br /> specifying quantities or concentrations of pollut- <br /> ants of pollutant praperties which may be dis- <br /> charged or introduced into a public sewer system by <br /> specific industrial categories. These standards <br /> are promulgated pursuant to Section 406.0 of the <br /> General pretreatment regulations for existing and <br /> new sources (40 CFR, Parts 125 and 403). <br /> Chemical Oxygen Demand (COD) - The measure of <br /> the oxygen-consuming capacity of organic and <br /> inorganic matter present in the waste-water <br /> expressed in mg/1 as the amount of oxygen consumed <br /> from a chemical oxidant in a specific test, but not <br /> differentiating stable from unstable organic matter <br /> and thus not necessarily correlating with bio- <br /> chemical oxygen demand. <br /> City - The City of Paris, Paris, Texas or any <br /> authorized person acting in its behalf. <br /> Comminuted Garbage - Garbage that has been <br /> shredded to such a degree that all particles will <br /> be carried freely under the flow conditions <br /> normally prevailing in sanitary sewers, with no <br /> particle greater thdn one-half (1/2) inch in any <br /> dimension. <br /> Composite Sample - A series of samples mixed <br /> together so as to approximate the average strength <br /> of discharge to the sewer. A composite sample for <br /> a twenty- four -hour period shall consist of a pool <br /> of not less than twelve (12) samples (one hundred <br /> (100) milliliters minimum volume), unless special <br /> conditions warrant otherwise and the supervisor <br /> designates an alternative procedure that is accept- <br /> able. Samples shall be iced or refrigerated during <br /> sampling and transportation to appropriate labor- <br /> atory facilities. <br /> Control Authority - The City of Paris and its <br /> authorize representati.ves. <br /> Control Manhole - A manhole giving access to a <br /> building sewer at a point before the building sewer <br /> discharge mixes with other discharges in the public <br /> sewer. <br /> <br /> <br /> -4- <br />