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Leighton Consulting, Inc. (Leighton) provides geotechnical engineering, environmental <br />consulting, and materials testing and special inspection services. Our firm enjoys a rich <br />history in Southern California having provided professional engineering and geologic <br />services for 60 years and earned a reputation as a leader in this field through our <br />innovative yet practical design solutions and field support for construction projects. <br />Leighton has been providing Tetra Tech geotechnical consulting services for over <br />20 years and understands the expectation and requirements of the design team and local <br />agencies. <br />Our 180 employees are strategically located throughout Southern California to serve our <br />clients from offices in Irvine, Downtown Los Angeles, Rancho Cucamonga, Temecula, San <br />Diego, Ventura, and Santa Clarita. Our staff is comprised of California licensed <br />Geotechnical Engineers (GE), Professional Engineers (PE), Certified Engineering <br />Geologists (CEG), Hydrogeologists (CHG), Professional Geologists (PG), and Registered <br />Environmental Assessors (REA). Supporting the professional consulting services, we have <br />in-house geotechnical and materials testing laboratories that are certified by Caltrans, <br />AASHTO, Division of State Architects (DSA), and City of Los Angeles. <br />Our local experience gives us an incomparable history and basis for understanding site <br />issues and constraints. We have successfully completed projects with complex geology <br />and constraints and won over 40 awards for engineering excellence. We have provided <br />professional services for many water infrastructure projects, including water tanks and <br />reservoirs, storm drains, storm channels, detention basins, sewer lines, potable water <br />and recycled water pipelines, desalination plants, and groundwater replenishment <br />facilities. <br />L eighton <br />