Res 2024-219 approving an On-Call Agreement with Tetra Tech, Inc., for engineering design, bid and construction phase services for the Wallace Addition Subdivision Improvements Project, in an amount not to exceed $2,000,000.00

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Docusign Envelope ID: BB27E2CA-90E7-44DF-ACD6-60284C2E92F6 ATTACHMENT A CITY OF SAN MARCOS WALLACE ADDITION SUBDIVISION IMPROVEMENTS SCOPE OF SERVICES mesquite and Ligustrum trees per San Marcos City Ordinances, Section 5.5.2.2- (g)(2), will be identified and tagged with a point number. j. Locate required survey borings, paving material and geometry, and extra cross-sections at the request of the City. Locations of cross-sections will require pre-staking by the City or City's Engineer prior to survey. C. Field Investigations: The City has a lot of relevant information (geotechnical, surveying, and Subsurface Utility Engineering (SUE)),which will be provided to the Consultant as par of existing data. This information was collected for the Wallace Addition Offsite Drainage Improvements project. However, the Consultant will use HVJ Associates to perform any additional geotechnical investigations on the project. Additional SUE investigations will be performed by the Rios-Group within the project limits as well (Refer to HVJ and Rios-Group Proposals attached). a. Geotechnical Investigation: The Consultant will have their subconsultant, HVJ perform eight (8) geotechnical bores at selected locations in the subdivision to provide overall physical properties of soil, rock and other subsurface conditions. Each bore will be drilled to a depth of 20 feet (FT). The Geotechnical deliverables shall be provided in two separate reports, a Geotechnical Data Report (GDR) and a Geotechnical Design Recommendation Memorandum. The Consultant will incorporate the geotechnical design recommendations into the design. b. Subsurface Utility Engineering: The Consultant will have their subconsultant, Rios Group, perform subsurface utility engineering (SUE). The SUE will encompass Quality Level (QL) B for all underground utilities within the limits of investigation. Up to 16 QLA SUE test holes will be performed for this project for existing utilities at critical locations to support utility conflict resolution. II. Preliminary Engineering Consultant will prepare a Preliminary Engineering Report (PER) for the Wallace Addition Subdivision Improvement project. This report will evaluate the feasibility, scope, and estimated costs for the design and construction of drainage systems, roadway improvements, water main replacement, and sewer replacement. The PER will assist the City in making informed decisions on whether to proceed with the entire project or prioritize water and sewer main replacements over drainage and roadway improvements. Additionally, the PER will establish the foundation for detailed planning and design, including projections for future phases to support budget planning. A. Project Management and Quality Assurance/Quality Control (QA/QC): This task consists of effort associated with project administration, coordination with City staff, coordination and supervision of the project team, and quality management so that project milestones and deliverables meet schedule and budget constraints during the Preliminary Engineering phase. B. Meetings a. Kickoff Meeting -Tetra Tech will attend a kickoff meeting at the project beginning. b. Project Coordination Meetings: One (1) utility coordination meeting has been budgeted for the Preliminary Engineering Phase. It is assumed that the meeting will be held prior to beginning the preliminary design. The Consultant will attend the meeting with the City to determine project constraints and needs as well as discuss design considerations. A site visit will follow the meeting. c. Project Status Meetings: Three (3) project status meetings have been budgeted for the Preliminary Engineering Phase. 2