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HomeMy WebLinkAbout15 - Civic Center Project - Leighton ConsultingCITY OF NEWPORT BEACH CITY COUNCIL STAFF REPORT Agenda Item No. 15 September 8, 2009 TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL FROM: Public Works Department Stephen Badum sbad u m(a)newportbeachca. gov 949 - 644 -3311 SUBJECT: NEWPORT BEACH CIVIC CENTER PROJECT - APPROVAL OF AMENDMENT NO. 3 TO PROFESSIONAL SERVICES AGREEMENT WITH LEIGHTON CONSULTING, INC. FOR GEOTECHNICAL SERVICES RECOMMENDATION: Approve Amendment No. 3 to the Professional Services Agreement (PSA) with Leighton Consulting, Inc., of Irvine, California, to provide supplemental geotechnical exploration and consulting services at a not to exceed price of $99,640 and authorize the Mayor and City Clerk to execute the agreement. DISCUSSION: On February 24, 2009, City Council approved a PSA with Leighton Consulting for the preparation of a geotechnical study for the City Hall and Park project to assist the design team during preliminary design process and to support environmental documentation at a cost of $62,674. On May 26, 2009, City Council approved Amendment #1 to the PSA with Leighton Consulting for supplemental work for the preliminary design including additional borings, samples for agricultural tests, installation of groundwater monitoring wells, percolation test data, and collection of groundwater data from wells at a cost of $18,555. Also approved at the May 26 meeting was Amendment No. 2 to the PSA with Leighton Consulting for the preparation of a design -level geotechnical report to provide geotechnical recommendations for the proposed City Hall and Park. This work was valued at $33,574. During the ongoing schematic design process, staff identified the need for additional geotechnical design work to advance the design of various elements of the Civic Center project. The proposed work will include: Newport Beach Civic Center Project — Approval of Amendment No.3 to the Professional Services Agreement with Leighton Consulting September 8, 2009 Page 2 • Installation and monitoring of additional groundwater wells to better establish groundwater levels with respect to construction dewatering and foundation design as well as analysis of the ground water quality. • Recommendations for agricultural soil placement of the north and central park parcels including slope stability analysis and grading recommendations. • Design level geotechnical work for the Library expansion. • Supplemental geotechnical work for the pedestrian walkways in the central park. • Design level geotechnical work for the proposed pedestrian overcrossing over San Miguel. • Additional geotechnical work to determine slope stability and grading recommendations of the north park parcel. The proposed fee for Amendment #3 is $99,640. The work scope is itemized and billing will be per the approved billing rates as shown in Exhibit 1 of the attached PSA, which are the same as the billing rates in the current contract. With this amendment, the total allocated work on this contract is valued at $214,443. Environmental Review: Architectural and Engineering services and geotechnical investigation and design services are not projects as defined in the California Environmental Quality Act (CEQA) Implementing Guidelines. City Council has retained LSA who will prepare environmental documentation for the project. Funding Availability: There are sufficient funds available in the following account: Account Description Newport Beach Civic Center Submitted by: 4te . B adu Works Director Account Number 7410- C1002009 Attachment: Amendment No. 3 to PSA with Leighton Consulting, Inc. Amount $ 99,640 $ 99,640 AMENDMENT NO. THREE TO PROFESSIONAL SERVICES AGREEMENT WITH LEIGHTON CONSULTING, INC. FOR CITY HALL & PARK MASTER PLAN EIR GEOTECHNICAL EXPLORATION AND CONSULTATION THIS AMENDMENT NO. THREE TO PROFESSIONAL SERVICES AGREEMENT, is entered into as of this day of , 2009, by and between the CITY OF NEWPORT BEACH, a Municipal Corporation ( "CITY "), and LEIGHTON CONSULTING, INC., a California Corporation whose address is 17781 Cowan, Irvine, California, 92614 ( "CONSULTANT "), and is made with reference to the following: RECITALS: A. On February 24, 2009, CITY and CONSULTANT entered into a Professional Services Agreement, hereinafter referred to as "AGREEMENT ", for the performance of geotechnical exploration and consultation for the design and preparation of environmental documents for the City Hall and Park, hereinafter referred to as "PROJECT ". B. CITY and CONSULTANT have entered into two separate AMENDMENTS of the AGREEMENT, the latest dated May 26, 2009. C. CITY desires to enter into this AMENDMENT NO. THREE to reflect additional services not included in the AGREEMENT or prior AMENDMENTS. D. CITY desires to compensate CONSULTANT for additional professional services needed for PROJECT. E. CITY and CONSULTANT mutually desire to amend AGREEMENT, hereinafter referred to as "AMENDMENT NO. THREE ", as provided here below. NOW, THEREFORE, it is mutually agreed by and between the undersigned parties as follows: 1. In addition to the services to be provided pursuant to the AGREEMENT and AMENDMENT NOS. ONE and TWO, CONSULTANT shall diligently perform all the services described in AMENDMENT NO. THREE, including but not limited to, all work set forth in the Scope of Services attached hereto as Exhibit A and incorporated herein by reference. The City may elect to delete certain tasks of the Scope of Services at its sole discretion. 2. City shall pay Consultant for the services on a time and expense not -to- exceed basis in accordance with the provisioris of this Section and the Schedule of Billing Rates attached to the AGREEMENT. Consultant's compensation for all work performed in accordance with this AMENDMENT NO. THREE, including all reimbursable items and subconsultant fees, shall not exceed Ninety-Nine Thousand, Six Hundred Forty Dollars and no /100 ($99,640.00) without prior written authorization from City. 3. Except as expressly modified herein, all other provisions, terms, and covenants set forth in AGREEMENT shall remain unchanged and shall be in full force and effect. IN WITNESS WHEREOF, the parties hereto have executed this AMENDMENT NO. THREE on the date first above written. APPROVED AS TO FORM: By: yne e ichamp Assistant City Attorney for the City of Newport Beach ATTEST: M Leilani I. Brown, City Clerk for the City of Newport Beach Attachments: Exhibit A — Scope of Services CITY OF NEWPORT BEACH, A Municipal Corporation By: Edward D. Selich Mayor for the City of Newport Beach LEIGHTON CONSULTING, INC.: M Kris Lutton, Senior Vice President By: Terry M. Brennan, Chief Financial Officer m S vo. Leighton Consulting, Inc. GEOTECHNICAL i GEOENVIRONMENTAL I MATERIALS TESTING Attention: From: Subject: Introduction City of Newport Beach 3300 Newport Boulevard Newport Beach, California 92663 Mr. Steve Badum Ms. Vivian Cheng Date: August 20, 2009 Proposal No. P60101236 Proposal for Final Geotechnical Design Services for the Proposed Newport Beach City Hall Master Planned Facility Project, City of Newport Beach, California Per the request of C.W. Driver, Leighton Consulting, Inc. (Leighton) is pleased to present this proposal to perform geotechnical exploration service based on the final design of the Newport Beach City Hall. The scope of work outlined below is based on our current understanding of the proposed facility and grading plan prepared by Bohlin Cywinski Jackson in July, 2009. Project Approach, Task 1— Groundwater Monitoring Wells Leighton performed an EIR level exploration in 2009. Groundwater was encountered in several of our borings. Groundwater monitoring wells were installed in two locations south of the ravine and the water level was recorded for a 4 -week period. The groundwater level was measured to be at approximately El. +125 feet msl immediately after drilling and groundwater level was measured for a 3 -week period on a weekly basis after drilling. The measured groundwater level ranged from El. +130 feet to +140 feet msl, which is approximately 5 to 15 feet higher than the water level - measured immediately after drilling. Based on the current project plan, the proposed finish floor elevation of the Emergency Operation Center (EOC), the access road from the Central Library to the proposed parking structure and the southern portion of the proposed City Hall will be at approximately El. +130 feet msl. Based on our data from the EIR study, there may be a possibility that groundwater will be encountered during excavation in this area and a temporary or permanent dewatering system may be required. In order to obtain better groundwater level information for the project, especially within the Page 1of10 17781 Cowan, Irvine, CA 92614 (949) 250 -1421 • FAX (949) 250 -1114 southern area of the Central parcel, we suggest two water monitoring wells be installed within the southern and central portion of the Central parcel. Groundwater samples will be obtained from the wells to test for basic water chemical composition for stormwater disposal purposes. Task 2 — Recommendations for Slope Stabilization for Agricultural Soil Placement Based on our discussion with PWP, the landscape architect, we understand that the option of having a lower degree of compaction within the upper 2 feet of the planted area is proposed to promote growth of vegetation. According to the latest colored cut -fill map (dated July 7, 2009) provided to us, areas of interest will include North and South parcels with proposed cut and fill slopes up to 22 feet high. In order to better identify the presence of any slope stability issues and provide feasible geotechnicat solutions for the grading of the slopes, Leighton, PWP, and C.W. Driver were in agreement that several cross - sections will be drawn on the areas of interest. Slope stability analyses will be performed based on the existing information extrapolated from the borings within the Central parcel. We will provide preliminary findings and possible mitigation measures based on the cross - sections and the assumed condition. The analyses will be based on the colored cut -fill map and the preliminary plan (PWP progress print dated July 7, 2009). PWP will then review the cross- sections from a landscaping perspective and C.W. Driver will review the sections from a constructability standpoint. Bucket auger borings will be performed to study the actual bedding condition (See Task 6 below). Task 3 — Library Expansion Hollow -stem auger borings will be performed within the future library expansion and access road to provide grading and foundation recommendations for the expansion as the existing borings are only limited to the Central parcel. As excavation is anticipated within this area, one of the borings will be converted into groundwater monitoring wells as there is a possibility that a dewatering system will be required during and after construction. As -built and available soils report of the Central library should be provided to Leighton, if available. Task 4 — Pedestrian Walkways at Ravine Borings will be performed to provide grading recommendations at the pedestrian crossings at the ravine. Specifically, the depth of undocumented fill or unsuitable materials will be identified within these areas. As the area is highly vegetated and due to the environmental sensitive nature of this area, borings will be performed by hand auger equipment. Page 2of10 17781 Cowan, Irvine, CA 92614 (949) 250 -1421 • FAX (949) 250 -1114 Task S — Pedestrian Over - Crossings Over San Mieuel Two borings, one at each abutment of the proposed bridge, will be performed to obtain information to provide foundation recommendations for the over - crossing. Based on the current project plan, we understand that only two 'foundation piers will be constructed and no pier is planned for the median on San Miguel Drive. We will coordinate with the structural engineer to develop necessary design parameters for the bridge. Task 6 — Slopes in the North Parcel (Dog Park) The cut -fill plan currently shows the design grades in the North parcel with south and east facing slopes up to 22 feet high. We have generated several cross - sections of the area based on the proposed grading plan from the landscape architect. Adverse bedrock bedding (with respect to design grades) was observed within the Central parcel where the City Hall building and parking structure are proposed. Based on this, cutting into the native bedrock may expose adverse geologic condition during grading of the North parcel. The cut -fill plan also shows that some of the slopes will increase loading on the bedrock due to raising of the site grades. Both cutting and loading the slope may pose potential slope stability issues during and after construction. Therefore, we recommend two large diameter bucket auger borings be performed to evaluate the geologic conditions of the bedrock and presence of clay seams in this area to provide final design recommendations based on the actual bedrock configuration. Scope of Work The scope below is prepared based on our current understanding of the project. Brief descriptions of our proposed tasks are provided below: Task I — Groundwater Monitoring Wells • Premark the proposed boring locations and contact Underground Service Alert (USA) for utility clearance. The boring locations will be provided to the team for approval prior to the field exploration. Coordinate with LSA to provide an archaeological /paleontological monitor. The archaeological /paleontological monitor will be on -site full time during all excavation activities. For the purpose of this proposal, we assume negative findings. Perform a subsurface exploration consisting of drilling, logging, and sampling of two hollow - stem auger borings. The borings will be drilled to approximately 60 to 70 feet below current ground surface or auger refusal, whichever is shallower. We will record blowcounts and log the subsurface conditions. Representative soil samples will be collected at selected depths Page 3of10 17781 Cowan, Irvine, CA 92614 (949) 260 -1421 • FAX (949) 260 -1114 from the borings for soil classification. Excess soil cuttings will be spread over the site at the landscape areas. Upon completion of drilling, convert the borings into water monitoring wells. The water level will measured immediately after drilling, one day after drilling, and one week thereafter for 3 weeks. Obtain water samples from the wells, if necessary. The wells will be developed 48 -hours after well construction to allow seals to mature. One groundwater sample will be collected from each well. Water samples will transport to a certified laboratory by a member of our technical staff with current 40 -hour HAZWOPPER training. The monitoring wells will be left in place. Water generated during well development will be stored in 50- gallon drums and legally disposed of off -site. The water will be tested for environmental compliance prior to disposal. The water samples obtained will be tested for the followings: Oil and grease, sulfides, total residual chlorine, total suspended solids, total petroleum hydrocarbons, total inorganic nitrogen, and turbidity. • Prepare a letter report presenting our findings and recommendations, which will include the followings: — Results of site reconnissance and previous studies on the site; — A description of regional and local geology, earth materials encountered in the current and previous explorations and depth to groundwater; — Log of the borings summarizing subsurface conditions and a plan indicating the current and previous boring locations; — Results of water quality test; — Update the existing geologic cross - sections with the new groundwater data obtained from the wells; — Anticipated groundwater level during construction and mitigation of dewatering. • Provide the City a draft copy of the report for review and comment prior to finalization and update the report based on review comments provided by City and the design team. Revisions to the report are assumed to take up to 4 hours. Efforts exceeding 4 hours will need additional budget, to be negotiated prior to the effort being taken. Page 4of10 17781 Cowan, Irvine, CA 92614 (949) 260 -1421 • FAX (949) 260 -1114 Task 2 — Recommendatioror Agricultural Soil Placement Participate in conference call with PWP and C.W. Driver to discuss the proposed agricultural and grading activities in the North and Central parcels; Review cut -fill maps provided by PWP and preliminary rough grading plan prepared by BCJ; Generate eight (8) cross - sections, four (4) within the North parcel and four (4) within the Central parcel, showing the existing and proposed grading configuration at the cross - section locations; Perform slope stability analyses for the cross - sections and provide grading recommendations incorporating requirements from the landscape architect. Soil parameters for our analyses will be based on our current knowledge of the soil conditions within the Central parcel. Based upon the results of our analysis, additional subsurface exploration in the form of a bucket auger boring may be required due to the presence of possible adverse geologic conditions in the North parcel. Provide the City a draft copy of the letter - report for review and comment prior to finalization and update the letter -report based on review comments provided by City and the design team. Revisions to the report are assumed to take up to 4 hours. Efforts exceeding 4 hours will need additional budget, to be negotiated prior to the effort being taken. Task 3 — Library Expansion Premark the proposed boring locations and contact Underground Service Alert (USA) for utility clearance. The boring locations will be provided to the team for approval prior to the field exploration. Coordinate with LSA to provide an archaeological /paleontological monitor. The archaeological/paleontological monitor will be on -site full time during all excavation activities. For the purpose of this proposal, we assume negative findings. Perform a subsurface exploration consisting of drilling, logging, and sampling of 4 to 5 hollow -stem auger borings. The borings will be drilled to approximately 30 to 50 feet below current ground surface or auger refusal, whichever is shallower. We will record blowcounts and log the subsurface conditions. Representative soil samples will be collected at selected depths from the borings for soil classification. Excess soil cuttings will be spread over the site at the landscape areas. Page 5of10 17781 Cowan, Irvine, CA 92614 (949) 260 -1421 • FAX (949) 250 -1114 Upon completion of drilling, convert one of the borings into water monitoring wells. The water level will measured immediately after drilling, and one week thereafter for 3 weeks. • Perform laboratory test which may include in -situ dry density and moisture content, direct shear, consolidation, R- Value, Atterberg Limits, grain size analyses, or corrosion suite. The recommendations of the library expansion and access road construction will be included in the final report. Recommendations will include site preparation and grading recommendation, overexcavation and recompaction requirement, foundation design of the library, and pavement design for the access road. Recommendations regarding the retaining wall along the access road will also be provided. Provide the City a draft copy of the report for review and comment prior to finalization and update the report based on review comments provided by City and the design team. Revisions to the report are assumed to take up to 4 hours. Efforts exceeding 4 hours will need additional budget, to be negotiated prior to the effort being taken. Task 4 — Pedestrian Walkways at Ravine Premark the proposed boring locations and contact Underground Service Alert (USA) for utility clearance. The boring locations will be provided to the team for approval prior to the field exploration. • Coordinate with LSA to provide an archaeological /paleontological monitor. The archaeological1paleontological monitor will be on -site full time during all excavation activities. For the purpose of this proposal, we assume negative findings. • Perform a subsurface exploration consisting of one day of hand auger borings. The borings will be excavated to a depth of approximately 5 feet into suitable bearing materials, or auger refusal. • Perform laboratory testing which may include in -situ dry density and moisture content, direct shear, consolidation, Atterberg Limits, grain size analyses, or corrosion suite. Incorporate the findings into the final report. Task 5 — Pedestrian Over - Crossings Over San Miguel Premark the proposed boring locations and contact Underground Service Alert (USA) for utility clearance. The boring locations will be provided to the team for approval prior to the field exploration. Page 6of10 17781 Cowan, Irvine, CA 92614 (949) 250 -1421 • FAX (949) 250.1114 • Coordinate with LSA to provide an archaeological /paleontological monitor. The archaeological/paleontological monitor will be on -site full time during all excavation activities. For the purpose of this proposal, we assume negative findings. • Perform a subsurface exploration consisting of excavating, logging, and sampling of 2 hollow -stem auger borings. The borings will be drilled to approximately 50 feet below existing grade. • Perform laboratory testing which may include in -situ dry density and moisture content, direct shear, consolidation, Atterberg Limits, grain size test, or corrosion suite. • Coordinate with the structural engineer and provide necessary geotechnical foundation design parameters for the proposed bridge. Incorporate the findings into the final report. Task 6 — Slopes in the North Parcel (Dqg Park) Premark the proposed boring locations and contact Underground Service Alert (USA) for utility clearance. The boring locations will be provided to the team for approval prior to the field exploration. • Coordinate with LSA to provide an archaeological/paleontological monitor. The archaeological/paleontological monitor will be on -site full time during all excavation activities. For the purpose of this proposal, we assume negative findings. • Perform a subsurface exploration consisting of excavating, logging, and sampling of 2 large diameter bucket auger borings. The borings will be drilled to approximately 30 feet below existing grade. The borings will be downhole logged by a Certified Engineering Geologist (CEG). • Perform laboratory test which may include in -situ dry density and moisture content, direct shear, tri -axial tests, and grain size analyses. • Perform slope stability analyses on the critical cross - sections. • Incorporate the findings into the final report. Page 7of10 17781 Cowan, Irvine, CA 92614 (949) 260 -1421 • FAX (949) 260 -1114 Task 7 — Plan Review Review grading plans and foundation plans. Task 8 — Team Meetings & Past Report Consultation • Attend meetings per the request of the project team. Provide post -report consultation to the design team. • Assuming 25 hours each for project engineer and engineering geologist. Optional Task — Groundwater Well Reading • Obtain groundwater reading in wells beyond one month after well installation. Schedule We are prepared to commence work immediately upon your written authorization to proceed. The schedule for the geotechnical exploration will depend on the availability of the final design information. A draft report can be provided within four to five weeks after the last exploration. We will issue the final report within two weeks of receiving final comments from the team. Page 8of10 17781 Cowan, Irvine, CA 92614 (949) 250 -1421 • FAX (949) 250 -1114 Rr-o-W Fees Page 9of10 17781 Cowan, Irvine, CA 92614 (949) 250 -1421 • FAX (949) 250 -1114 Task 1-- Groundwater Monitoring Wells with Water Sampling & Testing - Site Reconnissance, Field Planning, Boring Marking, Underground Utility (USA) Clearance $ 700.00 - Water Monitoring Wells installation by Leighton Field Geologist (2 days) $ 2,840.00 - Groundwater Monitoring (assuming one reading per week for 4 weeks) $ 2,000.00 - Report $ 2,500.00 - Wells Development (3 days after well installation) - I day $ 1,420.00 - Well Sampling and Sample Delivery - 1 day $ 1,420.00 Labor Sub -Total : $ 10,880.00 Task 2 - Recommendations for Agricultural Soil Placement - Cut -fill Plan and Preliminary Progress Plan Review $ 1,000.00 - Cross - Sections and Slope Stability Analyses $ 2,800.00 - Letter- Report $ 2,500.00 Labor Sub -Total : $ 6,300.00 Tasks 3, 4, 5 & 6 - Library Expansion, Bridges over San Miguel, Pedestrian Bridges at Ravine, Dog Park Slope Reconstruction - Site Reconnissance, Field Planning, Boring Marking, Underground Utility (USA) Clearance $ 1,200.00 - Subsurface Exploration by Leighton Field Geologist - 5.5 days $ 7,810.00 - Geotechnical Analyses $ 9,500.00 - Gemechnical Report Preparation $ 9,500.00 Labor Sub -Total : $ 28,010.00 Task 7 - Plan Review - Grading Plan Review $ 2,000.00 - Foundation Plan Review $ 2,000.00 Labor Sub -Total : $ 4,000.00 Task 8 - Team Meetings & Post Report Consultation - Senior Project Engineer (25 hours) $ 3,525.00 - Senior Engineering Geologist Geologist (25 hours) $ 3,525.00 Labor Sub -Total : $ 7,050.00 Labor Total: $56,240.00 Page 9of10 17781 Cowan, Irvine, CA 92614 (949) 250 -1421 • FAX (949) 250 -1114 j Task 1- Groundwater Monitoring Wells - With Water Sampling - Drill Rig, Water Well Installation, Cultural and Path. Monitoring $ 9,950.00 Groundwater Laboratory Test (2 water samples) $ 1,200.00 Groundwater Sampling, Well Development and Groundwater Disposal $ 2,200.00 (assuming non - hazardous materials) Sub -Total : $ 13,350.00 Tasks 3, 4, 5 & 6 - Exploration for Library Expansion, Bridges over San Miguel, Pedestrian Bridge at Ravine, Dog Park Slope Reconstruction CME -75 Drill Rig & Water Well Construction - 3.5 days $ 9,950.00 - Large Diameter Bucket Auger Rig - 2 days $ 7,900.00 - Cultural and Path. Monitoring - 5.5 days $ 4,000.00 - Laboratory Testing $ 8,200.00 Sub -Total : $ 30,050.00 Optional Task - Groundwater Monitoring Reading Beyond One Month after Installation - Groundwater Reading (one reading per week) 1 $ 2,300/Month Optional Labor, $2,300 /Month Assumptions • "rhe project will be subjected to the Prevailing Wage Law. • Fee for archaeotogical/paleontological monitoring assumed negative findings. If findings are positive for archaeologicaVpaleontological resources, we will inform you immediately and a budget augment will be submitted to complete a report of positive findings. The monitoring will be performed by LSA staff. • Attendance at meetings and/or public hearings over 25 hours can be provided at an additional cost before the additional service is provided. Page 10 of 10 17781 Cowan, Irvine, CA 92614 (949) 250 -1421 • FAX (949) 250.1114