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ON -CALL ENGINEERING SERVICES <br />WwRw�-OpDmA <br />Task 2: Utility Research and Design Survey - Tetra Tech will conduct as -built and utility <br />research withIn the project area, The utility research will Include contacting USA, and sending <br />preliminary notice to each utility company within the project area. Tatra Tech will verity the <br />location , of the utilities. bas6don. the USA Information by a field . walk of thia alignment, Tetra Tech <br />will Identify any critical u,01los "10h are recommended to be pothq10, We will prepare. a <br />memorandum summarizing the pothole recommendations for th a city review and approval. For <br />this sample project, we are assuming that live (6) utilities for the sewer main may be necessary <br />to be performed to confirm the vertical alignment of thesewar. We do not recommend potholing <br />for the PVO water main. The potho,ling suboonsulitant will procure the nooessory permit.$, <br />Including preparation of typical traffid Control plan (not a afto-spectlic traffic control plan). <br />Field topographic survey will be p0ormod for the Existing wollolte, area immediately around <br />the exiottrig well site ImiudIng the adjacent streets, The field topoojephlo sorvey, will include <br />curbs, gutters, modians, light poles, Improvements, surface breaklinse,ramps, a bovo ground <br />facilities, v QRS, <br />,tility manholes and pull b and the dipping of sewer and storm Oraln manholes; <br />�Ouk survey suboonsultant will provide a field survey profile over the proposodoeWorpipollne at <br />50-toot , intervals, This Is, similar to what we have done previously for other sewer rep)a6oment <br />projects. <br />Task M Geoteehh(dal Recommendations - Due to:the potential Of encountering ground water <br />during the construction of the proposed sewer main, we are recommending a gooteohnical <br />Irrveotloation, be performed during. the design phase of the work, We have 0S.Med a total Of <br />threa.�3) horings for the pipeline work,. One of thoborings can be located at the existing well site <br />if #I now building is required for the chlorination facilities, The cost difference between doing one <br />boring verses three borings Is minimal and the additional data will only ensure that the <br />contractor bidding on the Project has the necessary Information to bid the project. We have <br />assumed the following: field exploration can be performed during the -daylight hours on <br />weekdays under a no charge City Excavation permit; Identification, handling and treatment of <br />materials that need to be environmentally addresses'are beyond our scope of work; End the <br />removal of USA markings Is not Included In our scope of work, In addition, we have assumed <br />that typical traffic control plans will be acceptable to the City and site specific traffic. control plans <br />will not be required. <br />Task 4: Well Assessment - Richard 0. Slade & Associates (ROS), as a subconsultant to Tetra <br />Tech, will perform the following scope of work: <br />* Review available well date (both historic and current). Perform a site visit. <br />6 Prepare teohhlotil speoff loation and bid form for the City to contract with a well rehabilitation <br />company for the preliminary investigation of the well. This work will Include: conducting an <br />Initial short-term pumping test; removal of pump, sound bottom of casing and perform a <br />down -well survey, <br /># Provide support/assistance to the City during the preliminary Investigation work at the well. <br />* Prepare Technical Specifications for the rehabilitation of the well, Including probable cost for <br />the rehabilitation work. Also, prepare a memorandum discussing the estimated l0wer <br />production capacity of the well based on a new Casing liner. <br />o Perform field monitoring of the well r6habilltatlon construction (this Is an optional task), <br />This Optional Task Includes the following: attend pro-construotion meeting; observe the <br />removal of the pump on a full-time basis; support during well surveys; monitor the brushing <br />and balling of the well (two days), observe the Casing liner Installation on a partAlme basis; <br />monitor the mechanical and chemical development on a full-time basis; monitor the <br />swabbing and airlifting on a full-time basis; observe the video surveys; present during the <br />01tyof8entaAns �13� TETMA TECH <br />25E-1 78 <br />