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Last modified
8/19/2024 1:07:59 PM
Creation date
6/26/2023 3:59:26 PM
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Contracts
Company Name
WILDAN ENGINEERING
Contract #
A-2023-088-09
Agency
Public Works
Council Approval Date
5/16/2023
Expiration Date
5/15/2026
Insurance Exp Date
11/9/2023
Destruction Year
2031
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City of Santa Ana <br />Task 3 — Environmental Compliance and Permits — Option A and Option B <br />It is anticipated that the projects will qualify for Categorical Exemption Section 15301 Class 1(c) under existing highways and streets <br />improvements that allows for roadway improvements for the purpose of public safety and has no significant effects on the environment. <br />Willdan will perform its due diligence as part of this task to verify exemptions criteria set by California Environmental Quality Act (CEQA) <br />under Article 19 of Categorical Exemptions and make necessary recommendations to the City. The City's Planning Division will make the <br />final environmental determination. To satisfy CEQA requirements for the project, Willdan will prepare a notice of exemption for the City's <br />use. We will assist with posting of the notice and with fling the Notice of Exemption with the County Clerk. <br />If Willdan believes that further detailed environmental studies and reports are needed to comply with CEQA and or National <br />Environmental Protection Act (NEPA), subject to confirmation by City Staff, Willdan will meet and discuss with the applicable <br />resource/regulatory agencies to confirm the necessary work effort and identify the cost and schedule to prepare the environmental <br />reports, applications for permits and obtain clearance through all applicable agencies <br />as additional scope of work. As part of Clean Water Act, a NPDES permit may be Task 3 Deliverables <br />required for alternate discharging durind`well rehabilitation. • CEQA Categorical Exemption Form <br />Task 4— Preliminary Engineering —Option A and Option B <br />Subtask 4.01— Site Visit and Evaluation. Visual inspection is important for quality assurance and ensures a common-sense design. <br />Willdan will conduct a site visit to attain a comprehensive understanding of the existing site facilities and constraints. Willdan will catalog <br />existing conditions and facilities through photographs and field notes to be used as a reference during design. <br />An initial assessment will be performed to evaluate the existing condition of the water well. Based on the initial evaluations, rehabilitation <br />options will be proposed. The entire well will have to pulled and the casing will have to be video inspected. Common causes of reduced <br />well capacity could be sanding, rupture of casing, mineral build-up, heavy encrustation, screen damage, screen clogging or mechanical <br />failures of the pump. Depending on the assessment, rehabilitation could include brushing and bailing casing, replacing ruptured casing, <br />adding an elongated nozzle to bull to reduce sand flow, chemical treatment, remachine the pump and or rewind. After the initial <br />evaluation, Willdan will work with City's current maintenance and repair contractor to rehabilitate the well or will work with the City to bid <br />out the project. <br />Subtask 4.02 — Field Survey and Right -of -Way. Willdan will perform a field survey to ensure the accuracy and constructabilty of the <br />final construction plans. For this project the survey will: <br />• Establish right-of-way through record research and/or survey. <br />• Option A: Ground Survey to map the existing facilities and utility alignment. The E Subtask 4.02 Deliverables <br />utility survey will include manholes, covers, and depth of cover when required. One electronic copy of all field survey data <br />• Option B: Topographic/ground survey will be required to determine existing in Microstation V8i format <br />grades and facilities. To ensure acceptable cross -slopes full street sections will <br />be surveyed and analyzed at 25-foot intervals, driveways, and at approaches. The topographic survey shall extend a minimum of 200 <br />feet beyond limits of construction within the public right-of-way, where possible. Full street sections include obtaining field data at all <br />control or critical points, such as CL, BCR, ECR, and at any grade breaks between lips of gutters, and/or edges of pavement, and <br />flow lines. Where applicable to the project scope, survey of private property improvements shall be included. <br />Subtask 4.03— Geotechnical Investigation and Pavement Rehabilitation Strategies. All geotechnical investigation and analysis <br />shall be performed by a state -licensed geotechnical engineer with expertise in pavement design. Willdan will conduct geotechnical <br />investigations to measure the existing pavement sections and collect representative samples of subgrade soils for laboratory testing as <br />described below. The task work includes: <br />• Field exploration including coring, drilling, and sampling at three locations to the maximum drilled depth of 10 feet below ground <br />surface within the limits of the project site. Upon receipt of notice to proceed, a site visit will be performed to mark the core/boring <br />locations and evaluate access conditions for drilling equipment. Willdan will call USA for underground utility locating at least 48 hours <br />before any field work is performed. However, all available subsurface utility information should be provided/ identified prior to initiating <br />field exploration to reduce the potential for damaging existing utilities. Traffic control will be provided during drilling. <br />• Borings/cores will be measured and visually logged in the field by an experienced representative. The log will include pavement <br />sections thicknesses and subgrade conditions. The samples will be transported to Willdan's geotechnical laboratory for testing. <br />• Laboratory testing of collected representative subgrade soils will determine their index and engineering properties. <br />• Option A: Geotechnical investigation will be used to identify the soil properties for the trenching and backfill of proposed utilities. <br />• Option B: Providing recommendations for alternative new pavement sections. <br />• Option B: Performing a percolation test within a boring drilled to a depth <br />between 5 and 10 feet for BMP and green streets implementation (if 0 Subtask 4.03 Deliverables <br />needed). • Three hard copies of draft geotechnical report and <br />• Providing a draft report and presenting our findings, conclusions, and one electronic PDF copy <br />recommendations for review by the City. After receiving the City's • Three hard copies of final geotechnical report and <br />one electronic PDF copy <br />Comprehensive. Innovative. Trusted. Proposal for On -Call Engineering, 16 <br />- RFP No. 23-030 <br />
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