2026-088-E-Planning Dept-Schnabel Engineering South-Contract Amendment #3 Geotechnical Support and Revised Milestone Tasks Professional Engineering Services for the Lake Orange Intake

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Orange County Lake Orange Intake Tower Replacement Geotechnical Exploration Coordination, Observation, and Reporting 24P21018.00 / February 18, 2026 Page 3 Schnabel Engineering South, P.C. elevations will be estimated based on the reservoir elevation at the time of drilling and the depth to the mud line. It is our understanding that CVET will perform the laboratory testing of samples collected during the subsurface investigation. Schnabel will assist CVET with selecting which samples will be tested and assigning the laboratory testing. It is anticipated that the soil testing will generally consist of moisture content, gradations, and plasticity testing. The actual quantities and type of tests will be determined based on the findings and obtained samples from the geotechnical exploration. Task 3 – Geotechnical Data Report This task includes the preparation of a Geotechnical Data Report (GDR) to summarize results and key findings from the efforts performed under this scope of services and the geotechnical exploration by CVET. Detailed quality control/quality assurance review of the field and laboratory test data will be performed to support the development of the GDR. The report will include descriptions of the site and regional geology, findings of the geotechnical exploration program, soil laboratory test results, and supporting tables and figures. 3.0 ASSUMPTIONS AND EXCLUSIONS The following assumptions apply to the scope of services described herein. • CVET will complete the geotechnical exploration in seven to ten days of field work. • Work will be generally performed between the hours of 7:00 AM and 5:00 PM. • The field exploration will include up to 7 days of drilling, grouting, and observation well installation. • The scope of services herein will be performed as additional services under the agreement executed for our previous scope of services on November 1, 2024, and amended February 28, 2025. 4.0 TENTATIVE SCHEDULE Upon Notice to Proceed (NTP), Schnabel will begin coordination with the County and CVET. A kick-off meeting with all parties to discuss and review the drilling plan and scope of work will be performed one to two weeks prior to mobilization to the site. Schnabel will coordinate coverage of the geotechnical exploration with CVET and the County. It is our understanding the geotechnical exploration work will be voted on at the March 5, 2026 County Commissioners’ Meeting, and the work, if approved, is expected to begin approximately two weeks following this meeting. It is our understanding that the geotechnical exploration and laboratory testing is planned to be completed by April 24, 2026. Schnabel will begin preparation of the GDR following the field work, but the laboratory testing will need to be completed prior to finalizing the document. As such, it is anticipated that the report will be submitted to Orange County within two weeks of receiving the laboratory test results. In total, the scope of services described herein is anticipated to be completed within three (3) months from NTP. Docusign Envelope ID: 64C8DD46-2EE5-445D-9F2E-C6215945E8C2