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Contract #27199 Encumbrance # S005605 station is not included in this statement of work and will be paid 100 % by County in compliance with the consent decree with FDEP . PC South ' s ATS design will be approximately 4 . 4 acres and will consist of a large , gently sloped concrete surface that is overlaid with a rough grid- like material . Nutrient rich waters are discharged onto the surface and an algal turf is cultured . The algae grows naturally and eventually a dominate species will predominate the ATS surface . Living within the algae is a multitude of small invertebrates, insects , microbes , and other organisms that feed off the algae and the organic material present in the canal water. The ATS ' s living surface is a complex miniature ecosystem . As the algal turf grows , it forms dense mats over the surface and it is very effective at removing dissolved nitrogen and phosphorus . It also removes to a smaller extent a variety of other pollutants found in the canal water and some color. The treated water collects in a concrete trough at the bottom of the sloped ATS surface . Once the County constructs the project ( not part of this scope) , algae must be harvested to remove the collected nutrients from the treatment system and to avoid conversion of the algae mat to less desirable forms of algae. During the warmer months , one-half of the ATS surface will be harvested each week, which equates to biweekly harvesting for the total system . Algal production decreases during colder months , requiring harvesting only every three to four weeks . Harvesting will be accomplished by scraping the ATS surface with a special blade mounted to the front of a small tractor. The scraping dislodges the algal turf, which is washed into a collection trough where it is removed at a centralized harvesting station by a Duperon self-cleaning FlexRake with one-quarter inch openings . The captured algal mass drops onto an asphalt pad where it will be loaded into a dump truck for transport to Egret Marsh Stormwater Park where it will be composted or perhaps converted into methane gas for power generation . IV . TASK IDENTIFICATION Task 1 . All effort necessary to complete the engineering design and permitting for the ATS . The County will oversee the project design by staff and consulting engineer( s ) . The design of the RO water treatment pump station is not included in this SOW and will be paid 100% by County in compliance with the consent decree with FDEP . V . TIME FRAMES and DELIVERABLES All Deliverables shall be sent to the District office located at : 525 Community College Parkway South East Palm Bay , Florida 32909 Deliverables shall be addressed to the attention of: Frank Sakuma , Project Manager. Task 1 : Engineering Designs and Permitting Task 1 Deliverable due in District offices by September 15 , 2012 . Major Project Design ATS Pilot Plant data will be developed by a subcontract with Hydromentia , Inc . Facility Design and Permitting by Indian River County with assistance from subcontractors : Hydrotnentia , Inc . ; electrical/control engineering design subcontractor; structural engineering design subcontractor; and geotechnical engineering design subcontractor . Page 12