Ordinance 2247-97 - Laserfiche WebLink

and (c) of the Act (33 USC 1317) which apply to a specific category of users and which appear in 40 CFR Chapter I, Subchapter N, Parts 405-471. K. Categorical User. A user covered by one of EPA's Categorical Pretreatment Standards. L. Chemical Oxygen Demand (COD). A measure of the oxygen consuming capacity of inorganic and organic matter present in wastewater amenable to measurement by the methods described in Standard Methods for the examination of Water and Wastewater, 18th edition, 1992. COD is expressed as the amount of oxygen consumed from a chemical oxidant in mg/L during a specific test. M. City. The City of Everett, Washington. N. Cooling Water/Non-Contact Cooling Water. Water used for cooling which does not come into direct contact with any raw material, intermediate product, waste product, or finished product. Cooling water may be generated from any use, such as air conditioning, heat exchangers, cooling or refrigeration to which the only pollutant added is heat. O. Color. The optical density at the visual wave length of maximum absorption, relative to distilled water. One-hundred percent (100%) transmittance is equivalent to zero (0.0) optical density. P. Composite Sample. The sample resulting from the combination of individual wastewater samples taken at selected intervals based on an increment of either flow or time. Q. Day. Day shall be defined as a calendar day. R. Director. The Director of the City of Everett Public Works Department, or his duly authorized representative. S. Discharge Authorization. A waste water discharge permit authorizing users to discharge wastewater to the Everett POTW. These permits would be for users other than Significant Industrial Dischargers, or Categorical industries, but still requiring a control mechanism. T. Domestic Sewage. Domestic sewage means the liquid and water borne wastes derived from ordinary living processes, free from industrial wastes, and of such character to permit satisfactory disposal, without special treatment, into the POTW. U. Domestic User (Residential User). Any person who contributes, causes, or allows the contribution of wastewater into the City POTW that is of a similar volume and/or chemical make-up as that of a residential dwelling unit. Discharges from a residential dwelling unit typically include up to 100 gallons per capita per day at 250 mg/L of BOD and TSS. V. Environmental Protection Agency (EPA). The US Environmental Protection Agency or, where appropriate, the Regional Water Management Division Director, or other duly authorized official of said agency. W. Existing Source. For a categorical industrial user, an "existing source" is any source of discharge, the construction or operation of which commenced prior to the publication by EPA of proposed categorical pretreatment standards, which will be applicable to such 10