Company Overview

March 15, 2018

Judith Ibarra-Bianchetta, PE, CFM, ENV SP

Vice President, Director of Client Services

Tetra Tech provides innovative, cost-effective, and sustainable

solutions for our clients’ most challenging projects. Our world-

class technical experts have built Tetra Tech’s industry-leading

reputation for Leading with Science.

3

Leading with Science®

Just the facts

• Founded in 1966

• $2.8 billion annual revenue in FY2017

• More than 16,000 employees

worldwide

• A network of approximately 400 offices

• Worked on 60,000 projects in more

than 100 countries in FY2017

• Publicly traded on NASDAQ

as TTEK

4

Tetra Tech in the Beginning

4

Founded by 4 technical specialists in Pasadena, CA in 1966

Office locations

6

With more than 400 offices worldwide, we can quickly respond to our clients’ needs.

What we do

7

Water

Coastal and Marine

Resources

Management

Drinking Water

Groundwater

Stormwater

Wastewater

Treatment

Water Resources

Environment

Air Quality

Environmental

Compliance

Environmental

Management

Remediation

Waste Management

Infrastructure

Airports and

Aviation

High Performance

Buildings

Communications

Dams, Reservoirs, and Levees

Ports, Harbors, and

Waterfront

Transportation

Resource

Management

Industrial

Mining and

Minerals

Oil and Gas

Energy

Conventional

Generation

Energy Efficiency

Nuclear

Offshore Energy

Renewable Energy

Transmission and

Distribution

Utilities and

Market Analytics

International

Development

Agriculture and Economic

Growth

Architecture and

Engineering

Democracy and

Governance

Environmental and

Natural Resources

International Energy

Services

Land Tenure and

Property Rights

Rule of Law

Security and Stabilization

Water Resources and

Infrastructure

How we rank

8

5 Top 200 Environmental Firms

1 Water Treatment/Supply

1 Environmental Management

3 Environmental Firms in International Markets

4 Engineering/Design

6 Hazardous Waste

DESIGN RANKINGS

5 Top 500 Design Firms

1 Treatment/Desalination

1 Dams & Reservoirs

1 Hydro Plants

1 Pipelines

3 Sewer & Waste

ENVIRONMENTAL RANKINGS

Source: Engineering News-Record issues: 5/1/17, 6/19/17, 7/3/17, 7/13/17 , and 8/7/17

Business Outlook

8

• Aging Infrastructure

• Big Data

• Emergency Management and Community

Resilience

• Sustainable Infrastructure

• Smart Water Infrastructure

Bolivar Park Stormwater Capture Project

9

As part of the Los Cerritos Watershed Management Plan, the City of Lakewood, California, selected Tetra Tech to provide preliminary engineering, design services, and construction support services for the stormwater and runoff capture project in Bolivar Park.

Shanghai Tower

10

The award-winning Shanghai Tower rises 128 stories, making it the tallest building in China. Shanghai Tower & Construction Co., Ltd selected Tetra Tech to help create a towering structure that is a benchmark for sustainable design and technological innovation in China..

Using Innovative Technology to Recharge the

Groundwater in Southern California

11

The Water Replenishment District of Southern California (WRD), selected Tetra Tech to design the Ground Water Reliability Improvement Project (GRIP). Tetra Tech used multiple technologies to treat secondary effluent to a near distilled water quality and re-inject into the groundwater basin.

Sustainable Water and Sanitation in Africa

12

Tetra Tech led the Sustainable Water and Sanitation in Africa program to improve access to safe, reliable, affordable, and sustainable water and sanitation services for unserved and underserved urban populations in sub-Sahara Africa.

Los Angeles Partnerships

Tetra Tech maintains a business and charitable relationship with AbilityFirst, a nonprofit organization in the Pasadena, California, area that has served children and adults with physical and mental disabilities for nearly 90 years.

Los Angeles Environmental Education Fair (LAEEF)

STEM Events Tetra Tech employees from

across its Los Angeles

locations support STEM to

grow the next generation

of innovators and problem

solvers. Since the

program’s inception in

2016, more than 3,000

students in Los Angeles

have participated.

AbilityFirst

Tetra Tech has been an active committee member and sponsor

of LAEEF since 2017. Through this partnership, Tetra Tech

promotes sustainable living through education opportunities,

providing local connection opportunities, and community

empowerment.

13