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• CITY OF SAN MARCOS <br />2008-09 ANNUAL BUDGET <br />SEWER SURCHARGE RATE - EXHIBIT A <br />PAGE 1 OF 1 <br />(SURCHARGE PARTICIPANT LIST CUSTOMERS) <br />Applicable: <br />To any non-domestic customer of the City of San Marcos sanitary sewer system that has <br />higher levels of pollutants in their sewage waste than those contained in normal domestic <br />waste and placed on the surcharge participant list. A customer on the surcharge participant <br />list will have a sewer surcharge added to their monthly sewer bill. <br />Surcharge Rate: <br />COD Concentration (Milligram per Liter) <br />351 to 500 - $0.09 per pound. <br />501 to 600 - $0.15 per pound. <br />Over 600 - $0.30 per pound. <br />• The rate is not incremental: The COD reading will determine the surcharge rate for a <br />customer's entire discharge. <br />Surcharge Computation: <br />S = V * 8.34 * (COD-350) * Surcharge Rate <br />Definitions: <br />S - Surcharge in dollars that will appear on the monthly billing to customer. <br />V - Volume of monthly water usage in millions of gallons based upon the most recent twelve <br />months average, or a minimum of six months average for new customers. <br />8.34 - Weight in pounds of a gallon of water. <br />COD (Chemical Oxygen Demand) - A measure of wastewater quality in milligrams per liter. <br />350 - Threshold level of COD for sewer surcharge. <br />0