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Atkins North America, Inc. ATKINS 482 South Keller Road Orlando, Fl SIVC • L A1TA I IN 407.806-4108 Mernber of the SNC- Lavahn Group Indian River County Utilities Project West WWTP Oxidation Tank Monitoring Survey Scope of Services - Surveying General The services for this project will include structural monitoring of a oxidation ditch (tank) walls at the Indian River County West Regional WWTF. Atkins will establish 72 Monitoring Points (MPs) on 27 different locations around the tank's outside walls and crossing bridges to obtain horizontal and vertical positions. The MPs will be established at bottom, middle, top of walls and along 3 (three) crossing bridges on the top of the tank. Approximate MP locations are shown at the end of this document. The MPs will be located 3 (three) times, first time when the tank is full, second time when the tank is empty and the third time when the tank is full again. The storage tank will be scanned utilizing a High -Resolution Laser Scanner to generate a 3D model to capture existing tank features to facilitate the design of any new improvements by the Engineers. Atkins surveyors will utilize a combination of robotic total stations, First -order digital level with a barcoded INVAR rod, Fixed Scanning Technology and RTK GPS to collect information. Specific Surrey Tasks 1. Atkins will perform a high -order conventional geodetic survey to establish horizontal and vertical control points around the wastewater tank. The control points will be tied to the NAD 83 (2011 adjustment) of the Florida State Plane Coordinate System and NAVD 88 Elevations. 2. Establish MPs on the tank's outside wall and crossing bridges. 3. Located the MPs 3 (three) times. 4. Scan the tank when is empty from the top, standing at different locations on the crossing bridges to capture the tank's inside features and at ground level to capture the outside tank's features. 5. Once the monitoring work is completed, Atkins will remove the MPs from the tank's walls. 6. The survey deliverables will include 1" = 20' scale base file drawing in AutoCAD Civil 3D format with the MP locations, a registered point cloud on e57 format (31D model) and target deltas report. Limitations 1. Facilities or areas to be surveyed are readily accessible.