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6.1 D <br /> Page 14 <br /> and asphalt repair for the 10 lacations. The exca�ating estimates wifl be submitted to the Ci#y under a <br /> separa#e letter. <br /> V&A wiEl be on-site during exca�ation to attach the test leads#a the pipe{i�es and measure ultrasonic <br /> thickness of the exposed pipeEines. Phase l will determine the existing condition o#the pipelines, <br /> determine�f the corrosion monitoring systems require rehabilitatian pr�or to instaqation of the cathodic <br /> protection system and determine if the pipelines are suitable for installation a#the cathodic protection <br /> system. <br /> Phase I will de#ermine the type af cathodic protection system that is appropriate for each pipel�ne and <br /> determine if there is other wark that should be included with the installation o#the cathodic protec�ion <br /> system. Phase II will involve the design of the cathodic pro#ection system for the two pipelines. The <br /> preliminary scope of work for Phase f1 is indicated below. The f�nal scope of work and fee for the <br /> cathodic protec�ion design will be de#erm�ned during Phase i. <br /> SCOPE OF W4RK <br /> Task Descrip#�on <br /> Phase i--Pipeline Evaluation <br /> 1. Dacument Review—Review the pipeline alignment, leak repo�ts,geotechnical reports and <br /> avai�able drawings and documents for the pipelines. <br /> 2. Initiai Field Evaluation—Perform an evalua#ion to loca#e test s#ations and test points,and <br /> to measure baseline potentials at accessible test points. Test methods will be determined <br /> in the field and will be based on access to test points. Proposed methods include: <br /> • Pipe-to-soil potentials <br /> • Curre�t requirement tests <br /> • Electr'rca(cantinuity tes#s <br /> 3. Test Stafiion Locations--Indicate the locations for installation of new pipe[ine#est stations. <br /> Centerline location and excavation of the pipelines will be completed by ot�ers in <br /> accordance with City standards. Approximately 10 tes#stations will be installed, however <br /> the quantity and locations will be determined during the initia!field e�aluation. Proposed <br /> #est stations will be at cri#icaf locations including: <br /> • 8�0 fio 1000-foot intervals for the buried length of the pipelines <br /> • Ends of the metallic pipelines <br /> • Buried insulating joint locations <br /> 4. Test Station Installation and Direct Assessment—EVleasure the remaining wall thickness <br /> and corrosion pit depths of the exposed�ipe[ines using an ultrasonic thicicness meter and <br /> pit depth gauge. <br />