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Home My WebLink About03.g. Authorize execution of agreement with Degenkolb EngineersCentral Contra Costa Sanitary District ' BOARD OF DIRECTORS � g POSITION PAPER Board Meeting Date April 7, 2011 subject: AUTHORIZE THE GENERAL MANAGER TO EXECUTE AN AGREEMENT WITH DEGEN KGLB ENGINEERS FOR PROFESSIONAL ENGINEERING SERVICES FOR PRELIMINARY DESIGN FOR SEISMIC UPGRADES FOR THE SOLIDS CONDITIONING BUILDING, DISTRICT PROJECT 7290 Submitted By: Initiating Dept.IDiv.: Nathan Hodges, Assistant Engineer Engineering 1 Capital Projects RE VIE WED AND RECOMMENDED FOR BOARD AC TION: 4, Auoa�ha k 44) — — (Oe:� 4� N. Hod es A. Antkowiak ilecki cee I e1w I �t A. Fa rell - (6 f� James . 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 Degenkolb Engineers (Degenkolb) with a cost ceiling of $125,000 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 Solids Conditioning Building (SCB) to meet current seismic codes. The preliminary construction cost estimate for the needed retrofits is $5.5 million. The final design costs will depend on the type of retrofit design selected. ALTERNATIVESICONSIDERATIONS: 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 SCB in the event of a large earthquake (magnitude of 5.7) 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 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. M TESU PTosition Papers\ Hodges \7295_SC BPredesig n_Degen kolb_n h2. doc Page 1 of 3 POSITION PAPER Board Meeting Date: April 7, 2011 subject: AUTHORIZE THE GENERAL MANAGER TO EXECUTE AN AGREEMENT WITH DEGENKOLB ENGINEERS FOR PROFESSIONAL ENGINEERING SERVICES FOR PRELIMINARY DESIGN FOR SEISMIC UPGRADES FOR THE SOLIDS CONDITIONING BUILDING, DISTRICT PROJECT 7296 The SCB was constructed in the 1970s, and its earthquake resistance system is steel moment frames that transfer forces from the diaphragms (floors) to the building foundation. In the 1980s some seismic retrofit work was done on the building and in the 1990s seismic retrofits were done on some major pieces of equipment. The SCB houses important treatment equipment such as the sludge dewatering centrifuges, multiple hearth furnaces, cogeneration turbine, boilers, and various pumps and other solids handling equipment. Severe damage to the SCB could halt solids handling processes and steam production. The completed seismic analysis of the SCB compared performance of the building using the current 2007 California Building code, American Society of Civil Engineers 41 -06, and Federal Emergency Management Agency 351. Findings indicate that the steel moment frames, concrete elements, and floors do not have the required strength in the event of a design level earthquake (Magnitude 6.7 on the Concord Fault). The steel moment frames, being constructed pre -1994, have known flaws in their welded connections. The worst case implication of these flaws would be collapse of the SCB. A more likely scenario is that the building remains standing, although severely damaged, after the initial earthquake. Subsequent aftershocks could collapse the building or further damage the building. Staff had delayed the preparation of a detailed seismic analysis of the SCB and incinerators due to the uncertainties associated with the proposed 129 Incinerator Regulations. With the recent resolution of the 129 Incinerator Regulations, it is now prudent to proceed with an effort to develop more accurate costs for seismically strengthening these facilities. Given the estimated dollar magnitude of the seismic retrofits ($5.5 million), more accurate costs will help staff evaluate and develop a. financially effective road map for addressing pending future regulations (Green House Gas, nitrification and nutrient removal), rising energy and chemical costs and declining landfill gas supplies. In January 2010, 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 Degenkolb Engineers was considered the best fit for the SCB based on their experience with projects of a similar nature and their staff's project experience. Therefore, staff recommends selecting Degenkolb for this work. Staff has negotiated an agreement with Degenkolb for preliminary design in an amount not to exceed $125,000. The pre - design effort will be based on providing a life safety plus level of protection which is the level recommended by the California Building code for new wastewater treatment facilities. Probable construction costs will be developed for the selected alternative. NAPESUP\Position Papers\ Hodges\ 7296 _SCBPredesign_Degenkolb_nh2.doc Page 2 of 3 POSITION PAPER Board Meeting Date: April 7 1 2011 Subject: AUTHORIZE THE GENERAL MANAGER TO EXECUTE AN AGREEMENT WITH DEGENKOLB ENGINEERS FOR PROFESSIONAL ENGINEERING SERVICES FOR PRELIMINARY DESIGN FOR SEISMIC UPGRADES FOR THE SOLIDS CONDITIONING BUILDING, DISTRICT PROJECT 7295 The Seismic Upgrades for SCB project is included in the 2010 -2011 Capital Improvement Budget on pages TP -53 and TP -54. Staff has determined that there are adequate funds available and that the expenditure requirements are consistent with the budgeted Treatment Plant 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 Degenkolb Engineers with a cost ceiling of $125,000 for preliminary design of the Seismic Upgrades for Solids Conditioning Building, District Project 7296. NAPESUP\Position Papers\ Hodges\ 7296 _SCBPredesign_Degenkolb_nh2.doc Page 3 of 3