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Home My WebLink About08.a.2) Authorize Execution of Agmt. with KPFF Consulting Engineers, Inc.Central Contra Costa Sanitary District xaa) BOARD OF DIRECTORS POSITION PAPER Board Meeting Date: September 2, 2010 No.: Type of Action: AUTHORIZE AGREEMENT subject: AUTHORIZE THE GENERAL MANAGER TO EXECUTE AN AGREEMENT WITH KPFF CONSULTING ENGINEERS FOR PROFESSIONAL ENGINEERING SERVICES FOR PRELIMINARY DESIGN FOR SEISMIC IMPROVEMENTS FOR THE HEADQU OFFICE BUILDING, DISTRICT PROJECT 8226 Submitted By: Initiating Dept. /Div.: Nathan Hodges, Assistant Engineer Engineering / Capital Projects REVIEWED AND RECOMMENDED FOR BOARD ACTION: L 6Y C�J� Ta 1 N. Hodges B. Than ilecki A. Farrell ames . Kelly, General Manager ISSUE: Board of Directors' authorization is required for the General Manager to execute a professional services agreement in an amount greater than $50,000. RECOMMENDATION: Authorize the General Manager to execute a professional services agreement with KPFF Consulting Engineers (KPFF) with a cost ceiling of $115,000 for preliminary design work. FINANCIAL IMPACTS: This preliminary design work is intended to more accurately define potential costs for the design and construction of retrofits to the Headquarters Office Building (HOB) to meet current seismic codes. Preliminary estimates are that the construction of needed retrofits would cost in the $2.5 million range for the HOB. The final design costs will depend on the type of retrofit design selected. ALTERNATIVES /CONSIDERATIONS: The District could elect not to pursue this preliminary design work. This is not recommended because our preliminary analysis indicates that significant damage could occur to the HOB in the event of a large earthquake (magnitude of 6.7) on the Concord fault. If the project is to move forward, outside consultants must be used because District staff does not have this specialized expertise. BACKGROUND: Design of structures to withstand forces generated by earthquakes is a field which continues to evolve each time there is a significant seismic event. After each such event, structural engineers review the forces and resultant damages and reanalyze current codes. As a result of the Northridge Earthquake in 1994, significant changes were recommended for the then current building codes. In January 2008, California adopted updated building codes. District staff determined that it would be prudent to conduct a seismic analysis of District facilities, based on the knowledge that significant changes in seismic codes have occurred. NAPESUP \Position Papers\ Hodges \8226_HOBPredesign_KPFF.doc Page 1 of 3 POSITION PAPER Board Meeting Date: September 2, 2010 subject. AUTHORIZE THE GENERAL MANAGER TO EXECUTE AN AGREEMENT WITH KPFF CONSULTING ENGINEERS FOR PROFESSIONAL ENGINEERING SERVICES FOR PRELIMINARY DESIGN FOR SEISMIC IMPROVEMENTS FOR THE HEADQUARTERS OFFICE BUILDING, DISTRICT PROJECT 8226 This seismic analysis has been completed. The analysis identified significant deficiencies in many District facilities. Some improvements have been incorporated into current capital projects such as Standby Power Facility Improvements and HHWCF. Other facilities with deficiencies that should be addressed are the Headquarters Office Building (HOB), Pump and Blower Building, Solids Conditioning Building and Plant Operations Building. Staff recommends proceeding with the preliminary design of the HOB due to the deficiencies found when compared to current seismic design standards and the potential for significant damage to the building and potential injuries to the 112 staff housed in the HOB in the event of a major quake on the Concord fault. The chance of such an earthquake occurring is estimated to be 10 percent in the next 50 years. The HOB was constructed in 1981, and its earthquake resistance system is steel moment frames that transfer forces from the diaphragms (floors) to the building foundation. A unique feature of the HOB that is not typical of other steel moment frame buildings is that the second and third floors are constructed of wood. The first floor is constructed in a more standard fashion out of concrete filled metal deck which creates a rigid floor diaphragm. The wood floors on the second and third floors result in flexible diaphragms that may not adequately transfer the forces of a major earthquake and create a very flexible structure that is a primary reason for the seismic vulnerability of the HOB. A number of columns in the HOB structure do not have the capacity to the meet current minimum seismic performance standards. The columns are especially problematic on the third floor. Because of the flexible nature of the second and third floors of the HOB, relatively large displacements are expected. The steel moment frames are severely under - capacity for these expected displacements. While the analysis calculations indicate a likely potential for collapse, no such building of this construction type has collapsed due to failure of the steel moment frames. However, steel moment frame buildings are typically constructed using rigid floor diaphragms and are not subjected to the large displacements the HOB would experience due to the unique wood diaphragm design. District staff requested proposals from five firms. Five proposals were received and of these, four were short- listed for interview. After reviewing the detailed proposals and holding interviews with the four remaining project teams, the team proposed by KPFF was considered the best fit for the HOB based on their experience with projects of a similar nature and their staff's project experience. Therefore, staff recommends selecting KPFF for this work. Staff has negotiated an agreement with KPFF for preliminary design in an amount not to exceed $115,000. The pre- design effort will select a retrofit concept and develop a detailed scope of work for the final design. The NAPESUP \Position Papers\ Hodges \8226_HOBPredesign_KPFF.doc Page 2 of 3 POSITION PAPER Board Meeting Date: September 2, 2010 Subject: AUTHORIZE THE GENERAL MANAGER TO EXECUTE AN AGREEMENT WITH KPFF CONSULTING ENGINEERS FOR PROFESSIONAL ENGINEERING SERVICES FOR PRELIMINARY DESIGN FOR SEISMIC IMPROVEMENTS FOR THE HEADQUARTERS OFFICE BUILDING, DISTRICT PROJECT 8226 Board's Capital Projects Committee has reviewed the proposed pre- design and recommends approval. Staff will return to the Board of Directors with a request for approval of the design concept and a consulting agreement for the final design. The Seismic Improvements for the HOB project is included in the 2010 -2011 Capital Improvement Budget on pages GI -39 and GI -40. Staff has determined that there are adequate funds available and that the expenditure requirements are consistent with the budgeted General Improvements Program. Staff has evaluated this action and concluded it is exempt from the California Environmental Quality Act (CEQA) under CCCSD CEQA Guidelines Section 15262 since the agreement would be used for design studies for possible future actions which CCCSD has not approved, adopted, or funded, and the outcome of these tasks will not have a legally binding effect on later activities. Approval of this action will establish the Board of Directors' independent finding that the action is exempt from CEQA. The Board of Directors further finds that CCCSD will produce appropriate CEQA compliance documentation prior to undertaking any "project" arising from these preliminary design studies RECOMMENDED BOARD ACTION: Authorize the General Manager to execute a professional services agreement with KPFF Consulting Engineers with a cost ceiling of $115,000 for preliminary design of the Seismic Improvements for the Headquarters Office Building, District Project 8226. NAPESUP \Position Papers\ Hodges \8226_HOBPredesign_KPFF.doc Page 3 of 3