Item 17 - Agreements for On-Call Geotechnical Engineering Services

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City of Santa Ana RFP 23-123 — On -Call Geotechnical Engineering Services GEOCON SOUTH MAIN STREET CORRIDOR SANTA ANA, CALIFORNIA As a valued member of many project teams, Geocon was exclusively invited to provide testing and inspection services during the South Main Street Corridor Project. This was done to ensure the timely completion of the City's project as construction commenced while the City was in the process of finalizing negotiations with their group of on -call consultants. The project REFERENCE City of Santa Ana C/O Butier Engineering, Inc 17822 East 17th St, Ste 404 Tustin, CA 92780 Mark Butier, President (714) 832-7222 jrbutier@butier.com KEY PERSONNEL Jelisa Thomas Adams, GE John Stapleton, PE Scott DeVol Tyler Klingenberg Marc Radlinski PROJECT DURATION May 2021-September 2021 GEOCON FEE consisted of corridor improvements, street rehabilitation, and sewer [$87,000 improvements. The scope of work included pavement rehabilitation, enhancing PCC crosswalks and intersections, decorative and lighting improvements, irrigation, 2037 linear feet of sewer main and lateral replacement, and railroad coordination. landscaping and Geocon provided testing and observation services during the backfill of sewer main and lateral line trenches, and the preparation of pavement subgrade, and asphalt placement and compaction. Our scope of work included: • Performing inspection and approval of excavation bottoms prior to placing fill. • Performing in -place density tests on the soil, base, and asphalt materials placed and compacted. • Performing laboratory tests to aid in evaluating the compaction characteristics of soil types used for fill, as well as the properties of the asphalt concrete • Transmitting results effectively and immediately via verbal and written communication to the Contractor and City project liaison. • Preparing a report documenting our observations and testing services through the completion of our engagement on the project to facilitate a smooth transition and project completion. In -place density tests were performed in conformance with ASTM Test Method D6938 (Nuclear Density Gauge) for soil and soil -aggregate and D2950 for asphalt concrete. Laboratory tests were performed on the materials used as engineered fill to evaluate moisture -density relationships, optimum moisture content and maximum dry density. Geocon 2023-333 Page 23 August 28, 2023