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Task 1 — SURVEY, UTILITY LOCATES, AND GEOTECHNICAL ANALYSIS Topographic Route Survey will be performed and the limits for this task will be approximately 2 - '/2 miles from the proposed stormwater pump station at 27 '" Avenue SW and the South Relief Canal to the ATS site near Old Dixie Highway and the South Relief Canal . Survey information will only be provided on the side of the roadway or canal within the right -of--way where the forcemain is planned to be constructed . Underground locates of known existing utilities consisting of gas mains , telephone lines , fiber optics , water, and sewer infrastructure will be provided in limited areas by a Subconsultant along the selected route that will be surveyed under this task. Horizontal underground locates will be marked within 100 to 500 feet of intersections , canal crossings , and areas where surface evidence of known underground utilities exist . These marks will be shown by the surveyor on the survey . The locating service will provide up to three days of investigation . Vertical underground locates of known existing utilities will be required at areas where potential conflicts exist and at tie- in locations . This information is necessary to collect location , depth , and pipe size/material that will be required for the design . It is expected that approximately twenty (20) test holes along this corridor will be performed for this pipeline corridor . Horizontal and vertical underground locates in the vicinity of major intersections of the underground water and wastewater facilities will be provided . The major intersections include 27 `x' Avenue SW and 5 "' Street SW , and 20` x' Avenue and 5 "' Street SW . Soil borings will be provided in areas where horizontal directional drilling ( HDD) will occur . Up to six soil borings 20 ft depth will be included at different locations where HDD installation may occur . Task 2 - DESIGN Task 2 . 1 - Hydraulic Design and Modeling of the RO Concentrate Pipe and Treatment System The Consultant will evaluate IRCU ' s existing RO concentrate disposal system and the hydraulic impacts of connecting to a closed pipe system and pumping to the ATS site . It is assumed that the existing fiberglass (FRP) 14 - inch RO concentrate ( ROC ) pipe will be replaced with a new 12 - inch pipe due to the existing pipe ' s age and condition . Consultant will evaluate the residual pressure available at the RO plant and the need for repumping the concentrate to the ATS system . It is believed that the residual pressure that is available from the RO system can be utilized to pump the concentrate to the ATS site , combined with upto 10 mgd of stormwater flowing through the proposed 244nch pipe . The hydraulics of the RO system will be evaluated , consisting of. • Impacts to the RO skid concentrate control valve size • Impacts to the existing ROC treatment system K :\WPB_Civil\044572020 - IRCU Membrane&WQ Eval\SRO Brine Disposal\ATS Pipeline Project - Work Order 2 REV2 .doc Page 2 of 9