Agmt13 JDH Corrosion Consultants, Inc.

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EXHIBIT "A" SCOPE OF SERVICES AND TIME SCHEDULE PROJECT DESCRIPTION: The Highline Transmission Pipeline, which consists of approximately 14,500 linear feet of main, is a vital watermain to the City's water distribution system supplying water for domestic use and fire protection throughout Emerald Hills. The main consists of 12-inch and 16-inch ductile iron and cast iron pipes which transport water from the Hetch Hetchy waterline connection at Edgewood Road throughout Emerald Hills and is also used to fill a number of water storage tanks. Based on the available as-builts and record drawings, the mains are bare, are not cathodically protected or electronically continuous. The project took approximately 5 years to construct with work beginning in 1965. The main is primarily under pavement with certain sections in light to heavy wooded areas. The City is taking a proactive approach in analyzing the condition of the watermain to determine locations where corrosion may lead to eventual failure of the main. This analysis will provide the City with a blueprint of the condition of the watermain, to assist in preventing costly repairs and untimely shutdowns. SCOPE OF SERVICES: The project is divided into four (4) phases as shown in Attachment 1 to EXHIBITS. Consultant shall perform task 1, task 2 and task 3 for all four phases upon commencement of the project. Upon completion of task 1, task 2 and task 3, the consultant shall select one of the four phases for analysis and proceed with task 4, task 5 and task 6 for the selected phase. The City will evaluate the results of the assessment from the first phase selected and subsequently make a decision on whether to continue assessment of a different phase, change the method of assessment, or stop assessment and terminate the project. TASK 1 — PROJECT DOCUMENTATION REVIEW • Consultant shall schedule a kick-off workshop with the City and team members to discuss the goals and priorities of this study as well as known deficiencies and leak repair records for this transmission main. Pipeline accessibility and scheduling of work will be discussed and a final project schedule agreed upon at this meeting. • Consultant shall review as-built drawings in order to determine where the cast iron pipe is versus the ductile iron. Ductile iron is typically thinner walled pipe than cast iron and as such it typically fails much sooner than does cast iron. Therefore it is important to be able to distinguish between sections of cast iron pipe and ductile iron pipe in the investigation of the condition of this water main as the ductile iron pipe is at greater risk of early failure versus cast iron pipe. ATTY/AGR/2013.014/JDH CORROSION CONSULTANTS,INC. REV:01-25-13 VR Page 10 of 17