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ATTACHMENT "A" INDIAN RIVER COUNTY DEPARTMENT OF UTILITY SERVICES CENTRAL WWTP & REGIONAL SLUDGE PROCESSING FACILITY PROCESS & ODOR STUDY SCOPE OF SERVICES I. PROJECT DESCRIPTION The West Regional Wastewater Treatment Plant (WRWWTP) is located at 8405 8th Street Vero Beach, FL 32960. Construction on the West Regional Wastewater Treatment Facility expansion begun in July of 2007 and completed in May of 2010. The facility includes the a pretreatment structure with two (2) screens, and grit chambers and a 1000 CFM odor control system, a 5 -stage Biological Nutrient Removal (BNR) system reusing the existing tankage and adding new tankage, conversion of the system to use diffused air, adding two additional clarifiers with final total of four, three new effluent filters final total of four, additional chlorine contact basins, additional rotary drum thickeners, a new single stage 2500 SCFM chemical scrubber for existing aerated sludge holding tanks, additional pumps, piping, chemical feed systems and controls. Although, the initial design and construction of the Wastewater Plant included Odor Control equipment for areas of the plant that normally are expected to generate odors, recently, adjoining neighbors have expressed concerns about odors from the plant. Subsequently, it is important to review the plant to determine quickly what additional modifications may be required to address the odor complaints. Indian River County has requested PBS&J to perforin odor evaluation for the WRWWTP. The objectives of this project are to identify and evaluate the odor sources, c sample emissions of odorous compounds from facility and recommend appropriate methods for reducing odor emissions, if required. To achieve these objectives, PBS&J will utilize services of Jacobs Air Water Systems for collecting grab samples and Columbia Analytical Services, Inc for the sample analysis. The grab samples will be taken directly at the source where the emissions are expected at their highest level of detection. The sources will be prioritized to identify process parameters that might be responsible for the emissions, and evaluate potential approaches and costs for controls. II. SCOPE OF SERVICES The specific services and tasks to be provided by PBS&J are described as follows: Task 1— Project Initiation and Data Collection A. Activities during this initial period will focus upon gathering and compiling existing data related to the operation of the wastewater treatment processes. Influent quality data (since the start-up) will be collected and evaluated, The collected information and data will be reviewed and evaluated for relevant information 1