LAGWRP Nitrogen Removal $11mil City of Los Angeles 2007 The Nitrogen Removal Conversion Project to modify the secondary treatment facilities at LAGWRP allowed operation of an improved treatment process to reduce the amount of nitrogen in the plant discharge. During this modification most of the secondary treatment equipment, such as air diffusers, pumps, piping, valves and meters were removed and replaced, including the installation of new “state of the art” floating mixers, all the while maintaining the plant in near full operation. Griffith Company constructed a complex, highly technical treatment plant conversion project while keeping LAGWRP on-line and processing 20 million gallons of wastewater per day. We were able to mitigate issues of material availability with proactive solutions and creative scheduling while maintaining the integrity of the specifications and the City’s regulatory mandates. Projects Ports Roads & Bridges Redevelopment Airports Heavy Morris Dam Water Supply Enhancement Project Van Norman Chloramination Stations 1 & 2 Avenue 54 Wastewater Treatment Plant Expansion LAGWRP Nitrogen Removal Robert Diemer Water Treatment Facility ©2021 Griffith Company CA Contractors License #88 Equal Opportunity Employer

Terminal Core Infrastructure $36mil Los Angeles Airport 2012 The Bradley West Gates Construction Concourse Project (CCP2) is an integral part of the LAX Master Plan Program at the Los Angeles International Airport (LAX), one of Los Angeles’ largest public works projects in history at an estimated $1.5 billion. The project will consist of our grade crews working on mass excavation, grading, and shoring of the North and South Concourse along with demolition of existing concourses and utilities. Our underground crews face the challenge of installing new sewer, fire and domestic water, and storm drain lines in a tangle of existing utilities. Our structure team will construct the new bridge foundation work for the anticipated new gates on the west side of the Tom Bradley International Terminal that will accommodate the new generation Airbus A380’s and Boeing B878’s. The project team faces the everyday challenge of working alongside multiple other contractors within this 500,000 SF project. Our crews work long hours, including nights and weekends, and must remain vigilant and safe when working around airplanes and passenger buses. High security, coordination, communication, teamwork, and safety are the keys to project success. Projects Ports Roads & Bridges Redevelopment Airports LAWA Utility and Landside Access Modernization Taxiway T Phase II Runway 6L-24R Safety Area and Rehabilitation Terminal Core Infrastructure In-Line Baggage, Temporary Construction Facility Long Beach Airport Runway 26R Reconstruction Airport Drive West Heavy ©2021 Griffith Company CA Contractors License #88 Equal Opportunity Employer