2012 CAFR - Encina Wastewater Authority

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ENCINA WASTEWATER AUTHORITYTRANSMITTAL LETTERFiscal Year Ended June 30, 2012additional partners became members of the JPA including: the Buena Sanitation District (January 1964);the Vallecitos Water District (March 1965); and, the Leucadia Wastewater District and City of Encinitas(August 1971). These six member agencies remain EWA’s partners. There are no current plans to alterthe EWA purpose or membership.From 1963 to 1979, the County of San Diego managed the JPA. In 1963, the partners acquired a twentyfiveacre site in south Carlsbad near the confluence of the Pacific Ocean and Encinas Creek. The partnerscompleted construction of the Encina Water Pollution Control Facilities (EWPCF) including a 4.5 milliongallon per day (MGD) treatment plant and ocean outfall in 1965. By 1971, the Phase I expansionincreased treatment capacity to 6.75 MGD. In 1975, the Phase II expansion extended the Encina OceanOutfall and increased capacity to 13.75 MGD.The Leucadia Wastewater District managed the JPA from 1979 to 1988. During this time, the Phase IIIexpansion increased capacity to 22.5 MGD and wastewater treatment facilities were enhanced to meetstringent secondary treatment level standards. The Phase III Expansion Project also added criticaleffluent pumping facilities to the Encina Ocean Outfall system. In addition, cogeneration facilities weredesigned and placed in service to convert treatment process by-product methane and purchased naturalgas to the electricity and compressed air required for plant operations.In 1988, the partners amended the Basic Agreement through a Revised Basic Agreement (RBA). A shorttime later, JPA’s membership created an independent public entity called the Encina AdministrativeAgency (EAA) to operate, maintain, and administer the EWPCF, the Agua Hedionda Pump Station, andthe Buena Vista Pump Station. In 1991, EAA changed its name to the Encina Wastewater Authority.Completed in 1992, the Phase IV Expansion Project increased liquid treatment capacity to 36.0 MGD;enhanced solids treatment capacity to 38.0 MGD; provided interim wastewater flow equalizationfacilities to optimize treatment plant and Ocean Outfall operations; and, implemented extensive odorcontrol facilities to better serve the growing population of the service area. In 1995, EWA purchased thethirty-seven (37) acres adjacent to the southern boundary of the EWPCF now known, and referred to inthis Report, as the South Parcel.The Phase V Expansion Project commenced construction in September 2006 to meet anticipatedwastewater flows through 2025. The Phase V Project included replacement of existing dewateringequipment with two solid bowl decanter centrifuges and the installation of a triple-pass rotary drumheat dryer that produces Class A biosolids pellets. The Phase V Expansion was substantially complete inFebruary 2009 and dedicated in May 2009. The Authority’s Board of Directors took final acceptance ofthe project in December 2009. Permitted Phase V capacity is 43.3 MGD.Organization and Governance
ENCINA WASTEWATER AUTHORITYTRANSMITTAL LETTERFiscal Year Ended June 30, 2012EWA is organized under the Joint Powers Act (California Government Code 6500 et seq). The Encinamember agencies adopted the Revised Establishment Document (RED) on December 17, 1990 “to (a)retain EWA as the Operator/Administrator of the Encina Joint Powers and (b) reestablish theorganization, administration, rules and specific powers of the EWA.” The powers enumerated in theRED are exercised subject to the restrictions of the County Water District Law (California Water Code30000 et seq.). The RED provides for EWA’s governance by two elected officials appointed to EWA’sBoard of Directors at the discretion of each Member Agency.Members and officers of the Board of Directors on June 30, 2012 were:Member Agency Representative RepresentativeCity of Encinitas Kristin Gaspar, Vice Chair Mark MuirVallecitos Water District Darrell Gentry Jim PoltlCity of Vista & Buena Sanitation District Steve Gronke Judy Ritter, ChairLeucadia Wastewater District Elaine Sullivan Allan JuliussenCity of Carlsbad Keith Blackburn Ann KulchinCurrent ServicesThe EWA service area is comprised of approximately 123 square miles of coastal north San Diego Countywith a population of roughly 352,000. Wastewater is collected from the six districts and arrives at theEWPCF through gravity and force main piping manifolds. During the fiscal year ended June 30, 2012, theEWPCF treated and disposed of 9.1 billion gallons of wastewater. EWA also enforces industrialpretreatment regulations in the Encina service area. Additionally, EWA produces tactical and businessplanning documents that ensure the Encina Joint Facilities continue to meet member agency needs incompliance with local, state, and federal regulations.The EWPCF include state-of-the art wastewater treatment and disposal facilities. Primary wastewatertreatment facilities include an influent junction structure, bar screens, grit and sedimentation tanks.Secondary wastewater treatment facilities include aeration basins, clarifiers and dissolved air floatationunits to dewater residual secondary biosolids. Anaerobic digesters stabilize solids generated by theprimary and secondary treatment. After 15-20 days in the digesters, wastewater solids are pumped tothe dewatering building where centrifuges spin the solids to remove excess water. The resultantproduct, which is approximately 23% solids, is considered Class B biosolids. Uses for Class B biosolidsare restricted by U.S. Environmental Protection Agency (EPA) regulations.With the Phase V expansion project, a triple-pass rotary drum heat dryer was placed in service.Biosolids from the centrifuges are pumped to the dryer and heated to approximately 200 degreesFahrenheit. The heat drying process produces pellets that are more than 90% solids and consideredClass A biosolids. The system normally operates five days per week and produces about 26 tons per day
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2012 CAFR - Encina Wastewater Authority

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