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8.A. - Page 34 of 73 <br />Attachment D <br />district's annual flows are estimated by mutual consensus between the City and San Mateo County at 23% of <br />the City's total wastewater flow to the Authority. In fiscal year 2017-18, the sewer district billed 7,056 <br />accounts, of which 6,451, or approximately 91%, were residential. For fiscal year 2017-18, the sewer district's <br />annual sewer rate was $680 per residential unit or equivalent. San Mateo County collects these charges on its <br />property tax rolls. See Table A6 for further discussion of San Mateo County's sewer charges. <br />Emerald Lake Heights Sewer Maintenance District (Zone 2) — This district includes <br />approximately 1,537 sewer accounts, of which all but 4 are residential. The district pays the City for sewer <br />service based on the number of accounts multiplied by the City's existing sewer rates. <br />Oak Knoll Sewer Maintenance District — This district includes approximately 135 accounts, of <br />which all but 2 are residential. The district pays the City based on the number of accounts multiplied by the <br />City's existing sewer rates. <br />Kensington Square Sewer Maintenance District — This district includes approximately 74 <br />residential accounts and pays the City based on the number of accounts multiplied by the City's existing sewer <br />rates. <br />Woodside Town Center Sewer Assessment District — This district includes approximately 143 <br />accounts, of which all but 16 are residential. Under an agreement between the Town of Woodside on behalf <br />of the district and Redwood City, the district is obligated to pay the City for a pro rata share of Redwood <br />City's payments to the Authority based on the district's share of total wastewater flow sent to the Authority <br />by Redwood City. The agreement also requires the district to pay a small sewer transmission fee and capacity <br />rental fee. <br />Edgewood Sewer Maintenance District - This district includes approximately 15 residential <br />accounts and pays the City based on the number of accounts multiplied by the City's existing sewer rates. <br />Sewer Utility Regulatory Issues <br />General. Regulatory requirements applicable to the City's sanitary sewer collection system and <br />conveyance system are contained in or imposed by regulation pursuant to the Federal Water Pollution <br />Control Act, as amended, and the State of California Porter Cologne Water Quality Control Act of 1969, <br />as amended. Both federal and State regulations are administered through the San Francisco Bay Regional <br />Water Quality Control Board. The City is not aware of any environmental or regulatory issues that would <br />adversely impact its ability to provide sewer collection service. <br />Waste Discharge Requirements. The City is not subject to independent waste discharge <br />requirements in connection with operation of its sanitary sewer collection system because it sends its <br />wastewater to the Authority for treatment and discharge. <br />Wastewater Rates <br />The City's wastewater rates are independently established by the City Council pursuant to a rate <br />ordinance, and do not require approval by any other legal entity. Single family residential customers are billed <br />a flat rate for sewer service. Non-residential customers pay volumetric charges based on customer class and <br />metered water use, subject to a minimum monthly charge. <br />The City has increased its sewer rates each year for the past 10 years. Rate increases have accounted <br />for the anticipation of increased funding needs for the City's collection system capital improvement program, <br />the City's pro rata share of the Authority's capital improvement program, and the City's sewer enterprise <br />A-6 <br />548 <br />