Item 19 - Agreements for On-Call Engineering Services

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33 Years of Industry Exp. 1ar M.S., Civil Engineering, Texas A&M University, College Station, Texas B.S., Civil Engineering, Chung Yuan Christian University, Taiwan ■ CA Registered Geotechnical Engineer#2376 CA Registered Civil Engineer #50068 40-Hour Cal -OSHA Health and Safety Training Djan Chandra, PE GE Senior Principal Engineer Djan's area of expertise includes foundation design, soil reinforcement, slope stability analysis, and pavement design/rehabilitation. With 33 years of experience, he has successfully completed wastewater and waterworks projects throughout Southern California for many sanitation and water agencies. His extensive experience in design and application of geosynthetics reinforcements in geotechnical engineering, including over steepened slopes, pavement subgrade stabilization, and segmental retaining walls, has been proven an asset on a variety of projects. Serrano Water District Wells 3 and 5 PFAS Treatment Plant, Villa Park, CA. Geotechnical Engineer for a PFAS treatment plant that includes six 12-foot diameter GAC vessels supported on a concrete pad and the associated piping and site paving. Conducted field exploration consisting of two hollow -stem auger borings to refusal depths of 11 to 15 feet into the gravel and cobble layers. Prepared a geotechnical exploration report with recommendations for site grading, seismic and foundation design parameters, and pavement. Well 1A PFAS Treatment Facility, City of Fullerton, CA. Geotechnical Engineer for a PFAS treatment facility that includes four 12-foot diameter, ion -exchange (IX) vessels supported on a concrete pad and a pre -filtration system. Drilled and sampled two exploratory borings to a depth of 261/2 feet. Provided geotechnical recommendations for the project and prepared a report presenting the findings, conclusions, and recommendations. Provided oversight for geotechnical and special inspection and testing services during construction. Main Plant PFAS Treatment Facility. Citv of Fullerton. CA Geotechnical Engineer for a PFAS treatment facility for Wells 3A and 5 through 8 at the City's Main Plant. The new facility includes 16 to 20 new ion -exchange (IX) and/or GAC vessels with new supply and waste tanks supported on concrete pads. The geotechnical exploration also evaluated an alternative location within the plant, which is also being considered as a permanent location for additional 20 new vessels. Advanced six borings to depths of 111/2 to 261/2 feet and collected soil samples for laboratory testing. Provided oversight and coordination with the City, subcontractors, and project civil engineers for the field exploration and development of the geotechnical recommendations for the project. Yorba Linda Water District Headquarters PFAS Treatment Facility, Placentia, CP Geotechnical Engineer for a PFAS treatment facility for Wells 1, 5, 7, 10, 12, 18, and 19 at the District's headquarters that consists of 6 pre- treatment vessels and 22 new ion exchange (IX) vessels. Each vessel is 12-foot in diameter and 16.5-foot tall, supported on a 2.5-foot-thick mat foundation. Other improvements include a booster pump station, new piping, equipment, and site paving. The field exploration included exploratory borings to a depth of 50 feet since the site is located in a liquefaction zone. Developed geotechnical recommendations for the project, including mitigation measures for liquefaction potential, prepared a geotechnical exploration report, and provided inspection and testing services during construction. The project is one of the largest PFAS Systems of its kind to be installed in the country and can produce 19 million of treated groundwater per day. City of Santa Ana I On -Call Engineering Design Services for PFAS Treatment Systems RFP NO. 22-133 A-42