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i ATTACHMENT 1 to WORK ORDER NUMBER PCS= 1 PILOT ALGAL TURF SCRUBBER SYSTEM FOR PC SOUTH SCOPE OF WORK The COUNTY has requested that the CONSULTANT provide , install , and operate a pilot algal turf scrubber system for the COUNTY ' s PC ( Pollution Control) South Project . The Work is more particularly described below . 1 Algal Turf Scrubber® Field Investigation ( Pilot) Program Introduction The pilot scale investigation of the Algal Turf Scrubber@ (ATSTM ) will simulate the ATSTM treatment process specific to the water quality conditions associated with the blending of water from the South Relief Canal and a Reverse Osmosis Concentrate Water . The results will be used to ( i ) refine periphyton growth and water treatment projections and ( ii ) optimize the design of a full -scale Algal Turf Scrubber@ Water Pollution Control Facility . The CONSULTANT shall furnish , install , and operate a pilot scale ATSTM system for a 6 - month period . Influent water shall be a blend of water from the South Relief Canal ( managed by the Indian River Farms Water Control District or IRFWCD) and an RO concentrate generated by the Indian River County Utilities Department ( Utilities Department) . The blend will be such that it is emulative of the expected mix when the two waters are introduced through discharge of the concentrate into the South Relief Canal . This blend is expected to be 6 : 1 to 10 : 1 canal water to Concentrate . The Algal Turf Scrubber@ Mobile Pilot Unit ( MPU ) will be as shown in Figure 1 : The MPU consists of an aluminum ATSTM floway with support structure , self- siphoning surger , effluent box , 40 mil EPDM base , and a geotextile grid . ® The MPU floways shall be installed at a design slope of 0 . 5 % . The floway shall have a width of 1 feet and a length of 500 feet . ® Inflow water samples shall be collected weekly from the surger reservoir via a time interval refrigerated autosampler and via grab samples for short hold time parameters . ( See Table 1 ) i Outflow samples shall be collected weekly from the effluent sump via a second time interval autosampler and via grab samples for short hold time parameters . ( See Table 1 ) S Water from the South Relief Canal will be analyzed for key parameters via grab samples collected biweekly . ( See Table 1 ) Concentrate will be analyzed for key parameters via grab samples collected biweekly . ( See Table 1 ) Testing required through the FDEP Permit 31 FL0037940 issued to the Utilities Department will be collected via a third autosampler . ( See Table 1 ) 2 fApublic works\keithm\stormwater projects\south relief canal screening system and ats\work orders\hydromentia work order pcs- 1 - pilot plant - 8-23-2010 . doc