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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 Sub consultant 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 fifteen (15 ) sites will require this investigation, with approximately two test holes per site for a total of thirty (30) test holes required for this project. 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 20th Avenue, 27th Avenue, 43rd Avenue, 58th Avenue, and 81h Street, along the route selected in Task — 1 . Soil borings will be provided in areas where horizontal directional drilling (HDD) will occur. Up to eight soil borings 20 ft depth will be included at different locations where HDD installation may occur. Task 3 - Design Task 3. 1 - Hydraulic Modeling for Sizing Force main and Designing LS #89 Re-Pump Station The Consultant will evaluate IRCU' s existing Wastewater Transmission System hydraulic model to select the forcemain size from the proposed re-pump station to the end of the forcemain route as well as select pump capacity of the re-pump station. This selection will be based on typical minimum and maximum velocities of the proposed forcemain while providing forcemain pressure that does not require that the wastewater to be re-pumped before reaching the West WWTP or result in pressures that exceed the IRCU Standards. The Consultant will also evaluate the feasibility of reversing flow from the South W WTP Forcemain through the South RO Master Repump Station to the West W WTP . The Consultant will collect information regarding pump stations downstream of LS #89, input this scenario in the hydraulic model, and evaluate what changes may be required to the pump stations in order to reverse the wastewater flow. This effort may illustrate that this scenario is only feasible for an emergency situation. The Consultant will prepare 'a technical memorandum to IRCU with the results of these evaluations, and attend up to one meeting to discuss the findings . The Consultant can provide additional evaluations or meetings related to the hydraulics of this re-pump station, forcemain , or reversal of flow as Additional Services. Hydraulic capacity of the transmission forcemain will include additional capacity from a proposed tie- in at 58th Ave and 8th Street . F:AUtilitiesVU'CILITY - ENGINEER I NGAProjects - Utility Construction PermitsVIRC - 8th Street FM Ext from IR Bh, to 58th A - UCP 2628 Work Order No. 12 to KI-I &AAA - Work Order No. 12 - March 29, 2006.doc Pan 4 of I I