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
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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.
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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
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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.
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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.
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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.
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• 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.
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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.
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Rr-o-W Fees
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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
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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.
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