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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 history <br />in Southern California having provided professional engineering and geologic services for 60 <br />years and earned a reputation as a leader in this field through our innovative yet practical design <br />solutions and field support for construction projects. Leighton has been providing Tetra Tech <br />geotechnical consulting services for over 20 years and understands the expectation and <br />requirements of the design team and local agencies. <br />Our 180 employees are strategically located throughout Southern California to serve our clients <br />from offices in Irvine, Downtown Los Angeles, Rancho Cucamonga, Temecula, San Diego, <br />Ventura, and Santa Clarita. Our staff is comprised of California licensed Geotechnical Engineers <br />(GE), Professional Engineers (PE), Certified Engineering Geologists (CEG), Hydrogeologists (CHG), <br />Professional Geologists (PG), and Registered Environmental Assessors (REA). Supporting the <br />professional consulting services, we have in-house geotechnical and materials testing <br />laboratories that are certified by Caltrans, AASHTO, Division of State Architects (DSA), and City <br />of Los Angeles. <br />Our local experience gives us an incomparable history and basis for understanding site issues <br />and constraints. We have successfully completed projects with complex geology and constraints <br />and won over40 awards for engineering excellence. We have provided professional services for <br />many water infrastructure projects, including water tanks and reservoirs, storm drains, storm <br />channels, detention basins, sewer lines, potable water and recycled water pipelines, <br />desalination plants, and groundwater replenishment facilities. <br />f111 Leighton <br />