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containers; flow and biomass measurement procedures; instrumentation maintenance and calibration; identification of procedures and limits of detection; procedures for reporting data; and assessment and management of apparently aberrant data; identification of involved laboratories with appropriate certifications; and other issues as required to assure compliance with applicable State and COUNTY standards. The monitoring and quality assurance plan shall be prepared in a format typical of such plans for State and COUNTY projects, and shall be submitted for review, comment and subsequent approval by the COUNTY. The Consultant shall revise the initial submittal to incorporate acceptable responses to the various comments offered. This revised plan shall be submitted to the COUNTY as a final document. Task 4: System Design Sub -Task 4a: 20% Design The Consultant shall use the previously established "Basis of Design" and information collected from the bench scale operations (funded independent of this Agreement through County issued purchase orders) to complete model projections, applying the revised ATSTM design model, or ATSDEM, as developed by HydroMentia to project ATSTM sizing and dimensions, considering an average daily flow of approximately 10 MGD. The modeling will be done on a monthly basis, resulting in a collective projection of performance of the ATSTM in terms of annual nitrogen and phosphorus removal; an estimate of harvesting requirements and biomass management needs; and a review of expected changes in pH, temperature, color and suspended solids. In addition, the Consultant shall prepare a preliminary ATSTM layout, to include location and sizing of the unit processes, to include, if appropriate: • ATSTM processing area, initial layout • ATSTM associated hydraulic features, including receiving headworks, distribution piping, effluent flume, flow splitting structures and effluent piping connections. • Flex Rake Location • Equipment storage and operational support area • ATSTM Monitoring facilities As part of the 20% design, the Consultant shall complete necessary on-site soil borings and analyses for the proposed ATSTM site, and shall have this work completed by a geotechnical group deemed acceptable to the COUNTY. This work shall include soil borings up to 40 feet, soil classification and blow counts, groundwater levels, sieve analyses, modified Proctor evaluations, and a professional assessment of the suitability of the site for supporting various unit processes. The soils evaluation will allow the Consultant to determine the location and extent of usable area, which will influence the ATSTM site plan and unit sizing. Also to be included as part of the 20% design shall be a preliminary hydraulic profile with calculations, beginning with the introduction of flows to the ATSTM; development of 5 FAPublic Works\KeithM\Stormwater Projects\Egret Marsh Regional Stormwater Park\Work Orders\Hydromentia - Work Order #1.doc