2025-10-01 Tetra Tech GAWPP CTR072301.pdf

H o ld e r

Id e n ti fi e r

77777 77707 07070 00777 63616 06555 33307 63535 67602 64454 07763 11474 06241 33071 66374 60562 33110 74060 45772 76556 20753 67371 33036 22107 63341 02660 33746 07540 45357 62345 74073 60075 11005 63120 77727 25202 57731 10777 77770 70007 07007

66666 66606 06060 00626 06466 20444 62006 00022 62420 42222 06022 22624 02602 22060 22206 26226 02000 62220 24042 24022 00600 00242 62240 02006 22202 40402 40002 06000 00624 22622 02062 20224 26220 06200 66646 06224 06644 40666 66660 60006 06006

C e rt if ic a te

N o

CERTIFICATE OF LIABILITY INSURANCE

DATE(MM/DD/YYYY)

09/24/2024

IMPORTANT: If the certificate holder is an ADDITIONAL INSURED, the policy(ies) must have ADDITIONAL INSURED provisions or be endorsed. If SUBROGATION IS WAIVED, subject to the terms and conditions of the policy, certain policies may require an endorsement. A statement on this certificate does not confer rights to the certificate holder in lieu of such endorsement(s).

THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER. THIS CERTIFICATE DOES NOT AFFIRMATIVELY OR NEGATIVELY AMEND, EXTEND OR ALTER THE COVERAGE AFFORDED BY THE POLICIES BELOW. THIS CERTIFICATE OF INSURANCE DOES NOT CONSTITUTE A CONTRACT BETWEEN THE ISSUING INSURER(S), AUTHORIZED

REPRESENTATIVE OR PRODUCER, AND THE CERTIFICATE HOLDER.

PRODUCER

Aon Risk Insurance Services West, Inc.

Los Angeles CA Office 707 Wilshire Boulevard Suite 2600 Los Angeles CA 90017-0460 USA

PHONE

(A/C. No. Ext):

E-MAIL

ADDRESS:

INSURER(S) AFFORDING COVERAGE NAIC #

(866) 283-7122

INSURED 15105Safety National Casualty CorpINSURER A:

24319Allied World Surplus Lines Insurance CoINSURER B:

INSURER C:

INSURER D:

INSURER E:

INSURER F:

FAX

(A/C. No.):

(800) 363-0105

CONTACT

NAME:

Tetra Tech, Inc.

661 Andersen Drive Foster Plaza VII Suite 200 Pittsburgh PA 15220-2700 USA

COVERAGES CERTIFICATE NUMBER: 570108388820 REVISION NUMBER:

THIS IS TO CERTIFY THAT THE POLICIES OF INSURANCE LISTED BELOW HAVE BEEN ISSUED TO THE INSURED NAMED ABOVE FOR THE POLICY PERIOD INDICATED. NOTWITHSTANDING ANY REQUIREMENT, TERM OR CONDITION OF ANY CONTRACT OR OTHER DOCUMENT WITH RESPECT TO WHICH THIS CERTIFICATE MAY BE ISSUED OR MAY PERTAIN, THE INSURANCE AFFORDED BY THE POLICIES DESCRIBED HEREIN IS SUBJECT TO ALL THE TERMS, EXCLUSIONS AND CONDITIONS OF SUCH POLICIES. LIMITS SHOWN MAY HAVE BEEN REDUCED BY PAID CLAIMS. Limits shown are as requested

POLICY EXP

(MM/DD/YYYY)

POLICY EFF

(MM/DD/YYYY)

SUBR

WVD

INSR

LTR

ADDL

INSD POLICY NUMBER TYPE OF INSURANCE LIMITS

COMMERCIAL GENERAL LIABILITY

CLAIMS-MADE OCCUR

POLICY LOC

EACH OCCURRENCE

DAMAGE TO RENTED

PREMISES (Ea occurrence)

MED EXP (Any one person)

PERSONAL & ADV INJURY

GENERAL AGGREGATE

PRODUCTS - COMP/OP AGG

X

X

X

X X

GEN'L AGGREGATE LIMIT APPLIES PER:

$1,000,000

$1,000,000

$10,000

$1,000,000

$2,000,000

$2,000,000

X, C, U Coverage

A 10/01/2024 10/01/2025Y Y GL6676804

PRO-

JECT

OTHER:

AUTOMOBILE LIABILITY

ANY AUTO

OWNED

AUTOS ONLY

SCHEDULED

AUTOS

HIRED AUTOS

ONLY

NON-OWNED

AUTOS ONLY

BODILY INJURY ( Per person)

PROPERTY DAMAGE

(Per accident)

X

BODILY INJURY (Per accident)

$1,000,000A 10/01/2024 10/01/2025Y Y COMBINED SINGLE LIMIT

(Ea accident)

CA 6676805

EXCESS LIAB

OCCUR

CLAIMS-MADE AGGREGATE

EACH OCCURRENCE

DED

UMBRELLA LIAB

RETENTION

E.L. DISEASE-EA EMPLOYEE

E.L. DISEASE-POLICY LIMIT

E.L. EACH ACCIDENT $1,000,000

X OTH-

ER

PER STATUTEA 10/01/2024 10/01/2025

AOS

PS4068969A 10/01/2024 10/01/2025

$1,000,000

Y / N

(Mandatory in NH)

ANY PROPRIETOR / PARTNER / EXECUTIVE

OFFICER/MEMBER EXCLUDED? N / A

Y

YN

WI

WORKERS COMPENSATION AND

EMPLOYERS' LIABILITY

If yes, describe under DESCRIPTION OF OPERATIONS below

$1,000,000

LDC4068970

Each Claim03120276 10/01/2024 10/01/2025 Prof/Poll-Claims Made Cov $2,000,000Aggregate

Environmental Contractors and Prof

B YY

SIR applies per policy terms & conditions

$2,000,000

DESCRIPTION OF OPERATIONS / LOCATIONS / VEHICLES (ACORD 101, Additional Remarks Schedule, may be attached if more space is required)

RE: State of Arizona ASRAC Assessment and Remediation of Hazardous Substances Contract #CTR072301. The State of Arizona, its departments, agencies, boards, commissions, universities and its officers, officials, agents and employees are are included as Additional Insured in accordance with the policy provisions of the General Liability, Automobile Liability and Pollution Liability policies as required by written contract. General Liability, Automobile Liability and Pollution Liability policies evidenced herein are Primary and Non-Contributory to other insurance available to an Additional Insured, but only in accordance with the policy's provisions as required by written contract. A Waiver of Subrogation is granted in favor of The State of Arizona, its departments, agencies, boards, commissions, universities and its officers, officials, agents and employees in

CANCELLATIONCERTIFICATE HOLDER

AUTHORIZED REPRESENTATIVEArizona Department of Environmental Quality (ADEQ) 1110 W. Washington Street Phoenix AZ 85007 USA

ACORD 25 (2016/03)

©1988-2015 ACORD CORPORATION. All rights reserved.

The ACORD name and logo are registered marks of ACORD

SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED BEFORE THE

EXPIRATION DATE THEREOF, NOTICE WILL BE DELIVERED IN ACCORDANCE WITH THE

POLICY PROVISIONS.

accordance with the policy provisions of the General Liability, Automobile Liability, Workers' Compensation, Pollution Liability and Professional Liability policies as required by written contract. Stop Gap Coverage for the following States: OH, ND, WA, WY.

FORM TITLE:FORM NUMBER:

THIS ADDITIONAL REMARKS FORM IS A SCHEDULE TO ACORD FORM,

ADDITIONAL REMARKS

EFFECTIVE DATE:

CARRIER NAIC CODE

POLICY NUMBER

Aon Risk Insurance Services West, Inc.

NAMED INSUREDAGENCY

LOC #:

570000036654AGENCY CUSTOMER ID:

© 2008 ACORD CORPORATION. All rights reserved.

See Certificate Number:

See Certificate Number:

The ACORD name and logo are registered marks of ACORD

570108388820

570108388820

ACORD 25 Certificate of Liability Insurance Additional Description of Operations / Locations / Vehicles:

ACORD 101 (2008/01)

ADDITIONAL REMARKS SCHEDULE Page _ of _

Tetra Tech, Inc.

THIS FORM APPLIES ONLY TO THE FOLLOWING STATE(S) IF COVERED BY YOUR POLICY. IF A

STATE IS NOT LISTED BELOW, THIS FORM DOES NOT APPLY IN THAT STATE.

AL, AK, AR, CA, CO, CT, DE, DC, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA,

MI, MN, MS, MO, MT, NE, NV, NH, NM, NY, OK, PA, RI, SC, SD, UT, VT, VA, WV

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. LDC4068970 Endorsement No.

Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________

WC 99 99 35 (07 12) Page 1 of 1

WORKERS COMPENSATION AND EMPLOYERS LIABILITY INSURANCE POLICY WC 99 99 35

SPECIAL NOTICE OF CANCELLATION SERVICE

PROVIDED TO IDENTIFIED THIRD PARTIES ENDORSEMENT

As a special service to you, if we cancel this policy for any reason other than non-payment of premium, within thirty (30) days prior to the effective date of cancellation, we will mail a copy of such written notice of cancellation to all third persons whose name and address have, during the applicable policy period, been placed on file with us through your broker of record due to third party contractual requirements relating to such notice.

As a special service to you, if we cancel this policy for non-payment of premium, within ten (10) days prior to the effective date of cancellation, we will mail a copy of such written notice of cancellation to all third persons whose name and address have, during the applicable policy period, been placed on file with us through your broker of record due to third party contractual requirements relating to such notice.

If we have been provided with an electronic address of such third parties, at our election we may send notice of cancellation to such third parties by electronic mail.

Notice of cancellation of coverage provided to a certificate holder is a courtesy only. Failure to provide such notice will not extend the policy cancellation date, negate the cancellation of the policy, nor confer any rights nor expectations upon the certificate holder nor subject us, our agents nor representatives to liability for failure to provide notice.

POLICY NUMBER: GL 6676804 COMMERCIAL GENERAL LIABILITY

CG 24 04 12 19

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

CG 24 04 12 19 © Insurance Services Office, Inc., 2018 Page 1 of 1

WAIVER OF TRANSFER OF RIGHTS OF RECOVERY

AGAINST OTHERS TO US (WAIVER OF SUBROGATION)

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

ELECTRONIC DATA LIABILITY COVERAGE PART

LIQUOR LIABILITY COVERAGE PART

POLLUTION LIABILITY COVERAGE PART DESIGNATED SITES

POLLUTION LIABILITY LIMITED COVERAGE PART DESIGNATED SITES

PRODUCTS/COMPLETED OPERATIONS LIABILITY COVERAGE PART

RAILROAD PROTECTIVE LIABILITY COVERAGE PART

UNDERGROUND STORAGE TANK POLICY DESIGNATED TANKS

SCHEDULE

Name Of Person(s) Or Organization(s):

Any Person or Organization as required by written contract or agreement that is executed prior to the loss.

Information required to complete this Schedule, if not shown above, will be shown in the Declarations.

The following is added to Paragraph 8. Transfer Of Rights Of Recovery Against Others To Us of Section IV – Conditions:

We waive any right of recovery against the person(s) or organization(s) shown in the Schedule above because of payments we make under this Coverage Part. Such waiver by us applies only to the extent that the insured has waived its right of recovery against such person(s) or organization(s) prior to loss. This endorsement applies only to the person(s) or organization(s) shown in the Schedule above.

CG 20 10 12 19

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

CG 20 10 12 19 © Insurance Services Office, Inc., 2018 Page 1 of 2

ADDITIONAL INSURED – OWNERS, LESSEES OR

CONTRACTORS – SCHEDULED PERSON OR

ORGANIZATION

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

SCHEDULE

Name Of Additional Insured Person(s) Or Organization(s) Location(s) Of Covered Operations

Any person or organization as required by written contract or agreement that is executed prior to the loss.

All of your projects or locations.

Information required to complete this Schedule, if not shown above, will be shown in the Declarations.

A. Section II – Who Is An Insured is amended to include as an additional insured the person(s) or organization(s) shown in the Schedule, but only with respect to liability for "bodily injury", "property damage" or "personal and advertising injury" caused, in whole or in part, by:

1. Your acts or omissions; or

2. The acts or omissions of those acting on your behalf;

in the performance of your ongoing operations for the additional insured(s) at the location(s) designated above.

However:

1. The insurance afforded to such additional insured only applies to the extent permitted by law; and

2. If coverage provided to the additional insured is required by a contract or agreement, the insurance afforded to such additional insured will not be broader than that which you are required by the contract or agreement to provide for such additional insured.

B. With respect to the insurance afforded to these additional insureds, the following additional exclusions apply:

This insurance does not apply to "bodily injury" or "property damage" occurring after:

1. All work, including materials, parts or equipment furnished in connection with such work, on the project (other than service, maintenance or repairs) to be performed by or on behalf of the additional insured(s) at the location of the covered operations has been completed; or

2. That portion of "your work" out of which the injury or damage arises has been put to its intended use by any person or organization other than another contractor or subcontractor engaged in performing operations for a principal as a part of the same project.

Page 2 of 2 © Insurance Services Office, Inc., 2018 CG 20 10 12 19

C. With respect to the insurance afforded to these additional insureds, the following is added to Section III – Limits Of Insurance:

If coverage provided to the additional insured is required by a contract or agreement, the most we will pay on behalf of the additional insured is the amount of insurance:

1. Required by the contract or agreement; or

2. Available under the applicable limits of insurance;

whichever is less.

This endorsement shall not increase the applicable limits of insurance.

CG 20 37 12 19

CG 20 37 12 19 © Insurance Services Office, Inc., 2018 Page 1 of 1

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

ADDITIONAL INSURED – OWNERS, LESSEES OR

CONTRACTORS – COMPLETED OPERATIONS

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

PRODUCTS/COMPLETED OPERATIONS LIABILITY COVERAGE PART

SCHEDULE

Name Of Additional Insured Person(s) Or Organization(s)

Location And Description Of Completed Operations

Any person or organization as required by written contract or agreement that is executed prior to the loss.

All of your projects or locations.

Information required to complete this Schedule, if not shown above, will be shown in the Declarations.

A. Section II – Who Is An Insured is amended to include as an additional insured the person(s) or organization(s) shown in the Schedule, but only with respect to liability for "bodily injury" or "property damage" caused, in whole or in part, by "your work" at the location designated and described in the Schedule of this endorsement performed for that additional insured and included in the "products-completed operations hazard".

However:

1. The insurance afforded to such additional insured only applies to the extent permitted by law; and

2. If coverage provided to the additional insured is required by a contract or agreement, the insurance afforded to such additional insured will not be broader than that which you are required by the contract or agreement to provide for such additional insured.

B. With respect to the insurance afforded to these additional insureds, the following is added to Section III – Limits Of Insurance:

If coverage provided to the additional insured is required by a contract or agreement, the most we will pay on behalf of the additional insured is the amount of insurance:

1. Required by the contract or agreement; or

2. Available under the applicable limits of insurance;

whichever is less.

This endorsement shall not increase the applicable limits of insurance.

CG 20 12 12 19

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

CG 20 12 12 19 © Insurance Services Office, Inc., 2018 Page 1 of 1

ADDITIONAL INSURED – STATE OR GOVERNMENTAL

AGENCY OR SUBDIVISION OR POLITICAL

SUBDIVISION – PERMITS OR AUTHORIZATIONS

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

SCHEDULE

State Or Governmental Agency Or Subdivision Or Political Subdivision:

As required by written contract or agreement that is executed prior to the loss

Information required to complete this Schedule, if not shown above, will be shown in the Declarations.

A. Section II – Who Is An Insured is amended to include as an additional insured any state or governmental agency or subdivision or political subdivision shown in the Schedule, subject to the following provisions:

1. This insurance applies only with respect to operations performed by you or on your behalf for which the state or governmental agency or subdivision or political subdivision has issued a permit or authorization.

However:

a. The insurance afforded to such additional insured only applies to the extent permitted by law; and

b. If coverage provided to the additional insured is required by a contract or agreement, the insurance afforded to such additional insured will not be broader than that which you are required by the contract or agreement to provide for such additional insured.

2. This insurance does not apply to:

a. "Bodily injury", "property damage" or

"personal and advertising injury" arising out of operations performed for the federal government, state or municipality; or

b. "Bodily injury" or "property damage" included within the "products-completed operations hazard".

B. With respect to the insurance afforded to these additional insureds, the following is added to Section III – Limits Of Insurance:

If coverage provided to the additional insured is required by a contract or agreement, the most we will pay on behalf of the additional insured is the amount of insurance:

1. Required by the contract or agreement; or

2. Available under the applicable limits of insurance;

whichever is less.

This endorsement shall not increase the applicable limits of insurance.

CG 20 01 12 19

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

CG 20 01 12 19 © Insurance Services Office, Inc., 2018 Page 1 of 1

PRIMARY AND NONCONTRIBUTORY –

OTHER INSURANCE CONDITION

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

LIQUOR LIABILITY COVERAGE PART

PRODUCTS/COMPLETED OPERATIONS LIABILITY COVERAGE PART

The following is added to the Other Insurance Condition and supersedes any provision to the contrary:

Primary And Noncontributory Insurance This insurance is primary to and will not seek contribution from any other insurance available to an additional insured under your policy provided that:

(1) The additional insured is a Named Insured under such other insurance; and

(2) You have agreed in writing in a contract or agreement that this insurance would be primary and would not seek contribution from any other insurance available to the additional insured.

CG 24 17 10 01

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

CG 24 17 10 01 © ISO Properties, Inc., 2000 Page 1 of 1

CONTRACTUAL LIABILITY – RAILROADS

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

SCHEDULE

Scheduled Railroad:

As required by written contract or agreement that is executed prior to the loss.

Designated Job Site:

On or Within 50 feet of Railroad

(If no entry appears above, the information required to complete this endorsement will be shown in the Declarations as applicable to this endorsement.)

With respect to operations performed for, or affecting, a Scheduled Railroad at a Designated Job Site, the definition of "insured contract" in the Definitions section is replaced by the following:

9. "Insured Contract" means:

a. A contract for a lease of premises. However, that portion of the contract for a lease of premises that indemnifies any person or organization for damage by fire to premises while rented to you or temporarily occupied by you with permission of the owner is not an "insured contract";

b. A sidetrack agreement;

c. Any easement or license agreement;

d. An obligation, as required by ordinance, to indemnify a municipality, except in connection with work for a municipality;

e. An elevator maintenance agreement;

f. That part of any other contract or agreement pertaining to your business (including an indemnification of a municipality in connection with work performed for a municipality) under which you assume the tort liability of another party to pay for "bodily injury" or "property damage" to a third person or organization. Tort liability means a liability that would be imposed by law in the absence of any contract or agreement.

Paragraph f. does not include that part of any contract or agreement:

(1) That indemnifies an architect, engineer or surveyor for injury or damage arising out of:

(a) Preparing, approving or failing to prepare or approve maps, shop drawings, opinions, reports, surveys, field orders, change orders or drawings and specifications; or

(b) Giving directions or instructions, or failing to give them, if that is the primary cause of the injury or damage;

(2) Under which the insured, if an architect, engineer or surveyor, assumes liability for an injury or damage arising out of the insured's rendering or failure to render professional services, including those listed in Paragraph (1) above and supervisory, inspection, architectural or engineering activities.

CG 25 03 05 09

CG 25 03 05 09 Copyright, Insurance Services Office, Inc., 1996 Page 1 of 2

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

DESIGNATED CONSTRUCTION PROJECT(S)

GENERAL AGGREGATE LIMIT

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

SCHEDULE

Designated Construction Project(s):

All “construction projects” away from premises owned, rented or leased by the Named Insured(s). $4,000,000 per “project” with the maximum annual General Aggregate Limit for the policy term capped at $40,000,000.

Information required to complete this Schedule, if not shown above, will be shown in the Declarations.

A. For all sums which the insured becomes legally obligated to pay as damages caused by "occurrences" under Section I – Coverage A, and for all medical expenses caused by accidents under Section I – Coverage C, which can be attributed only to ongoing operations at a single designated construction project shown in the Schedule above:

1. A separate Designated Construction Project

General Aggregate Limit applies to each designated construction project, and that limit is equal to the amount of the General Aggregate Limit shown in the Declarations.

2. The Designated Construction Project General Aggregate Limit is the most we will pay for the sum of all damages under Coverage A, except damages because of "bodily injury" or "property damage" included in the "products-completed operations hazard", and for medical expenses under Coverage C regardless of the number of:

a. Insureds;

b. Claims made or "suits" brought; or

c. Persons or organizations making claims or bringing "suits".

3. Any payments made under Coverage A for damages or under Coverage C for medical expenses shall reduce the Designated Construction Project General Aggregate Limit for that designated construction project. Such payments shall not reduce the General Aggregate Limit shown in the Declarations nor shall they reduce any other Designated Construction Project General Aggregate Limit for any other designated construction project shown in the Schedule above.

4. The limits shown in the Declarations for Each Occurrence, Damage To Premises Rented To You and Medical Expense continue to apply.

However, instead of being subject to the General Aggregate Limit shown in the Declarations, such limits will be subject to the applicable Designated Construction Project General Aggregate Limit.

Page 2 of 2 Copyright, Insurance Services Office, Inc., 1996 CG 25 03 05 09

B. For all sums which the insured becomes legally obligated to pay as damages caused by "occurrences" under Section I – Coverage A, and for all medical expenses caused by accidents under Section I – Coverage C, which cannot be attributed only to ongoing operations at a single designated construction project shown in the Schedule above:

1. Any payments made under Coverage A for damages or under Coverage C for medical expenses shall reduce the amount available under the General Aggregate Limit or the Products-completed Operations Aggregate Limit, whichever is applicable; and

2. Such payments shall not reduce any Designated Construction Project General Aggregate Limit.

C. When coverage for liability arising out of the "products-completed operations hazard" is provided, any payments for damages because of "bodily injury" or "property damage" included in the "products-completed operations hazard" will reduce the Products-completed Operations Aggregate Limit, and not reduce the General Aggregate Limit nor the Designated Construction Project General Aggregate Limit.

D. If the applicable designated construction project has been abandoned, delayed, or abandoned and then restarted, or if the authorized contracting parties deviate from plans, blueprints, designs, specifications or timetables, the project will still be deemed to be the same construction project.

E. The provisions of Section III – Limits Of Insurance not otherwise modified by this endorsement shall continue to apply as stipulated.

CG 25 04 05 09

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

CG 25 04 05 09 © Insurance Services Office, Inc., 2008 Page 1 of 2

DESIGNATED LOCATION(S)

GENERAL AGGREGATE LIMIT

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

SCHEDULE

Designated Location(s): All locations you own, rent or occupy and as per schedule on file with the company. $4,000,000 per location with the maximum annual general aggregate limit for the policy term capped at $40,000,000.

Information required to complete this Schedule, if not shown above, will be shown in the Declarations.

A. For all sums which the insured becomes legally obligated to pay as damages caused by "occurrences" under Section I – Coverage A, and for all medical expenses caused by accidents under Section I – Coverage C, which can be attributed only to operations at a single designated "location" shown in the Schedule above:

1. A separate Designated Location General

Aggregate Limit applies to each designated "location", and that limit is equal to the amount of the General Aggregate Limit shown in the Declarations.

2. The Designated Location General Aggregate Limit is the most we will pay for the sum of all damages under Coverage A, except damages because of "bodily injury" or "property damage" included in the "products-completed operations hazard", and for medical expenses under Coverage C regardless of the number of:

a. Insureds;

b. Claims made or "suits" brought; or

c. Persons or organizations making claims or bringing "suits".

3. Any payments made under Coverage A for damages or under Coverage C for medical expenses shall reduce the Designated Location General Aggregate Limit for that designated "location". Such payments shall not reduce the General Aggregate Limit shown in the Declarations nor shall they reduce any other Designated Location General Aggregate Limit for any other designated "location" shown in the Schedule above.

4. The limits shown in the Declarations for Each Occurrence, Damage To Premises Rented To You and Medical Expense continue to apply.

However, instead of being subject to the General Aggregate Limit shown in the Declarations, such limits will be subject to the applicable Designated Location General Aggregate Limit.

Page 2 of 2 © Insurance Services Office, Inc., 2008 CG 25 04 05 09

B. For all sums which the insured becomes legally obligated to pay as damages caused by "occurrences" under Section I – Coverage A, and for all medical expenses caused by accidents under Section I – Coverage C, which cannot be attributed only to operations at a single designated "location" shown in the Schedule above:

1. Any payments made under Coverage A for damages or under Coverage C for medical expenses shall reduce the amount available under the General Aggregate Limit or the Products-completed Operations Aggregate Limit, whichever is applicable; and

2. Such payments shall not reduce any Designated Location General Aggregate Limit.

C. When coverage for liability arising out of the "products-completed operations hazard" is provided, any payments for damages because of "bodily injury" or "property damage" included in the "products-completed operations hazard" will reduce the Products-completed Operations Aggregate Limit, and not reduce the General Aggregate Limit nor the Designated Location General Aggregate Limit.

D. For the purposes of this endorsement, the Definitions Section is amended by the addition of the following definition:

"Location" means premises involving the same or connecting lots, or premises whose connection is interrupted only by a street, roadway, waterway or right-of-way of a railroad.

E. The provisions of Section III – Limits Of Insurance not otherwise modified by this endorsement shall continue to apply as stipulated

THIS ENDORSEMENT CHANGES THE POLICY. PLEASE READ IT CAREFULLY.

SNCA 026 10 13 Safety National Casualty Corporation Page 1 of 2

DESIGNATED ADDITIONAL INSURED

This endorsement modifies insurance provided under the following:

COMMERCIAL AUTOMOBILE COVERAGE PART

SCHEDULE

Name of Additional Insured Person(s) or Organization(s):

Any person or organization as required by written contract or agreement that is executed prior to the loss.

CHANGE

The person(s) or organization(s) shown in the Schedule above with whom you have agreed in a written contract to provide insurance such as is afforded under this Coverage Form, is included as an Additional Insured subject to the below:

(1) Insurance for such Additional Insured(s) scheduled above shall be afforded only to the extent that such

Additional Insured is liable for “bodily injury” or “property damage” arising out of your operations and resulting from the ownership, maintenance or use of covered “autos” by you while the covered “autos” are on premises owned or leased by the above scheduled Additional Insured(s).

(2) The insurance afforded under this Coverage Form to such Additional Insured(s) applies only:

(a) If the “accident” takes place subsequent to the execution and effective date of such written contract:

and,

(b) While such written contract is in force, or until the end of the policy period, which ever occurs first.

(3) How Limits Apply to Additional Insured(s) The most we will pay on behalf of the Additional Insured(s) scheduled above is the lesser of:

(a) The limits of insurance specified in the written contract or written agreement; or,

(b) The Limits of Insurance provided by the Coverage Form.

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. CA 6676805 Endorsement No.

Named Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________

Page 2 of 2 Safety National Casualty Corporation SNCA 026 10 13

The amount we will pay on behalf of such Additional Insured(s) shall be a part of, and not in addition to, the Limits of Insurance shown in the Coverage Form Declarations and described in this section. Such amount will thus not increase the Limits of Insurance shown for the Coverage Form.

(4) Exclusions

(a) This endorsement does not apply to liability of the Additional Insured which arises out of the ownership of transportation operating rights granted to the Additional Insured by public authority.

(b) This endorsement does not apply to the liability of the owner or anyone else from whom you hire or borrow a covered auto.

(5) Obligations at the Additional Insured’s Own Cost

No Additional Insured will, except at their own cost, voluntarily make a payment, assume any obligation, or incur any expense, other than for first aid, without our consent.

The Additional Insured(s) scheduled above shall be subject to all other conditions set forth in the Coverage Form.

This endorsement does not alter coverage provided in the Coverage Form.

POLICY NUMBER: CA 6676805 COMMERCIAL AUTO

CA 04 49 11 16

CA 04 49 11 16 © Insurance Services Office, Inc., 2016 Page 1 of 1

PRIMARY AND NONCONTRIBUTORY –

OTHER INSURANCE CONDITION

This endorsement modifies insurance provided under the following:

AUTO DEALERS COVERAGE FORM

BUSINESS AUTO COVERAGE FORM

MOTOR CARRIER COVERAGE FORM

With respect to coverage provided by this endorsement, the provisions of the Coverage Form apply unless modified by the endorsement.

A. The following is added to the Other Insurance

Condition in the Business Auto Coverage Form and the Other Insurance – Primary And Excess Insurance Provisions in the Motor Carrier Coverage Form and supersedes any provision to the contrary:

This Coverage Form's Covered Autos Liability Coverage is primary to and will not seek contribution from any other insurance available to an "insured" under your policy provided that:

1. Such "insured" is a Named Insured under such other insurance; and

2. You have agreed in writing in a contract or agreement that this insurance would be primary and would not seek contribution from any other insurance available to such "insured".

B. The following is added to the Other Insurance Condition in the Auto Dealers Coverage Form and supersedes any provision to the contrary:

This Coverage Form's Covered Autos Liability Coverage and General Liability Coverages are primary to and will not seek contribution from any other insurance available to an "insured" under your policy provided that:

1. Such "insured" is a Named Insured under such other insurance; and

2. You have agreed in writing in a contract or agreement that this insurance would be primary and would not seek contribution from any other insurance available to such "insured".

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. CA 6676805 Endorsement No.

SNCA 027 10 13 Safety National Casualty Corporation Page 1 of 1

WAIVER OF TRANSFER OF RIGHTS OF RECOVERY

AGAINST OTHERS TO US

SCHEDULE

Name Of Person Or Organization:

Any person or organization as required by written contract or agreement that is executed prior to the loss.

Information required to complete this Schedule, if not shown above, will be shown in the Declarations.

We waive any right of recovery we may have against the person or organization shown in the Schedule above because of payments we make for “bodily injury” or “property damage” to which this insurance applies, caused by an “accident” and resulting from the ownership, maintenance or use of a covered “auto”. This waiver applies only to the person or organization shown in the Schedule above.

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. GL 6676804 Endorsement No.

Named Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________ (Countersignature by the Broker or Agent shall only occur in the mailing states that require countersignature)

SNGL 047 0514 Safety National Casualty Corporation Page 1 of 1

SPECIAL NOTICE OF CANCELLATION SERVICE

PROVIDED TO IDENTIFIED THIRD PARTIES

This endorsement modifies insurance provided under the following:

COMMERCIAL GENERAL LIABILITY COVERAGE PART

CHANGE

The following new provision is added to A. Cancellation of the COMMON POLICY CONDITIONS or such other applicable state cancellation endorsement:

As a special service to you, if we cancel this policy for any reason other than non-payment of premium, within thirty (30) days prior to the effective date of cancellation, we will mail a copy of such written notice of cancellation to all third persons whose name and address have, during the applicable policy period, been placed on file with us through your broker of record due to third party contractual requirements relating to such notice.

As a special service to you, if we cancel this policy for non-payment of premium, within ten (10) days prior to the effective date of cancellation, we will mail a copy of such written notice of cancellation to all third persons whose name and address have, during the applicable policy period, been placed on file with us through your broker of record due to third party contractual requirements relating to such notice.

If we have been provided with an electronic address of such third parties, at our election we may send notice of cancellation to such third parties by electronic mail.

Notice of cancellation of coverage provided to a certificate holder is a courtesy only. Failure to provide such notice will not extend the policy cancellation date, negate the cancellation of the policy, nor confer any rights nor expectations upon the certificate holder nor subject us, our agents nor representatives to liability for failure to provide notice.

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. CA 6676805 Endorsement No.

(Countersignature by the Broker or Agent shall only occur in the mailing states that require countersignature)

SNCA 039 10 13 Safety National Casualty Corporation Page 1 of 1

SPECIAL NOTICE OF CANCELLATION SERVICE

PROVIDED TO IDENTIFIED THIRD PARTIES

The following new provision is added to A. Cancellation of the COMMON POLICY CONDITIONS or such other applicable state cancellation endorsement:

As a special service to you, if we cancel this policy for any reason other than non-payment of premium, within thirty (30) days prior to the effective date of cancellation, we will mail a copy of such written notice of cancellation to all third persons whose name and address have, during the applicable policy period, been placed on file with us through your broker of record due to third party contractual requirements relating to such notice.

As a special service to you, if we cancel this policy for non-payment of premium, within ten (10) days prior to the effective date of cancellation, we will mail a copy of such written notice of cancellation to all third persons whose name and address have, during the applicable policy period, been placed on file with us through your broker of record due to third party contractual requirements relating to such notice.

If we have been provided with an electronic address of such third parties, at our election we may send notice of cancellation to such third parties by electronic mail.

Notice of cancellation of coverage provided to a certificate holder is a courtesy only. Failure to provide such notice will not extend the policy cancellation date, negate the cancellation of the policy, nor confer any rights nor expectations upon the certificate holder nor subject us, our agents nor representatives to liability for failure to provide notice.

AL, AK, AZ, AR, CO, CT, DE, DC, FL, GA, HI, ID, IL, IN, IA, KS, LA, ME, MD, MA,

MI, MN, MS, MO, MT, NE, NV, NM, NY, NC, OK, OR, PA, RI, SC, SD, TN, VT, VA, WV

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. LDC4068970 Endorsement No.

Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________

WC 00 03 13 (04 84)

© 1983 National Council on Compensation Insurance.

WORKERS COMPENSATION AND EMPLOYERS LIABILITY INSURANCE POLICY WC 00 03 13

WAIVER OF OUR RIGHT TO RECOVER FROM OTHERS ENDORSEMENT

We have the right to recover our payments from anyone liable for an injury covered by this policy. We will not enforce our right against the person or organization named in the Schedule. (This agreement applies only to the extent that you perform work under a written contract that requires you to obtain this agreement from us.)

This agreement shall not operate directly or indirectly to benefit anyone not named in the Schedule.

SCHEDULE

Any Person or Organization as required by written contract or agreement that is

WI

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. PS 4068969 Endorsement No.

Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________

WC 00 03 13 (04 84)

© 1983 National Council on Compensation Insurance.

WORKERS COMPENSATION AND EMPLOYERS LIABILITY INSURANCE POLICY WC 00 03 13

WAIVER OF OUR RIGHT TO RECOVER FROM OTHERS ENDORSEMENT

We have the right to recover our payments from anyone liable for an injury covered by this policy. We will not enforce our right against the person or organization named in the Schedule. (This agreement applies only to the extent that you perform work under a written contract that requires you to obtain this agreement from us.)

This agreement shall not operate directly or indirectly to benefit anyone not named in the Schedule.

SCHEDULE

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. LDC4068970 Endorsement No.

Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________

WC 04 03 06 (04 84)

© 1998 by the Workers’ Compensation Insurance Rating Bureau of California. All rights reserved.

WORKERS COMPENSATION AND EMPLOYERS LIABILITY INSURANCE POLICY WC 04 03 06

WAIVER OF OUR RIGHT TO RECOVER FROM OTHERS

ENDORSEMENT—CALIFORNIA

We have the right to recover our payments from anyone liable for an injury covered by this policy. We will not enforce our right against the person or organization named in the Schedule. (This agreement applies only to the extent that you perform work under a written contract that requires you to obtain this agreement from us.)

You must maintain payroll records accurately segregating the remuneration of your employees while engaged in the work described in the Schedule.

The additional premium for this endorsement shall be 0 % of the California workers' compensation premium otherwise due on such remuneration.

SCHEDULE

Job DescriptionPerson or Organization

Any Person or Organization as required by written contract or agreement that is executed prior to the loss.

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No. LDC4068970 Endorsement No.

Named Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________

WC 42 03 04 B (06 14)

© Copyright 2014 National Council on Compensation Insurance, Inc. All Rights Reserved.

WORKERS COMPENSATION AND EMPLOYERS LIABILITY INSURANCE POLICY WC 42 03 04 B

TEXAS WAIVER OF OUR RIGHT TO RECOVER FROM OTHERS

ENDORSEMENT

This endorsement applies only to the insurance provided by the policy because Texas is shown in Item 3.A. of the Information Page.

We have the right to recover our payments from anyone liable for an injury covered by this policy. We will not enforce our right against the person or organization named in the Schedule, but this waiver applies only with respect to bodily injury arising out of the operations described in the Schedule where you are required by a written contract to obtain this waiver from us.

This endorsement shall not operate directly or indirectly to benefit anyone not named in the Schedule.

The premium for this endorsement is shown in the Schedule.

SCHEDULE

1. ( ) Specific Waiver

(X) Blanket Waiver Any Person or Organization as required by written contract or agreement that is executed prior to the loss.

2. Operations:

3. Premium: $ The premium charge for this endorsement shall be percent of the premium developed on payroll in connection with work performed for the above person(s) or organization(s) arising out of the operations described.

4. Advance Premium:

This endorsement changes the policy to which it is attached and is effective on the date issued unless otherwise stated.

(The information below is required only when this endorsement is issued subsequent to preparation of the policy.)

Endorsement Effective 10/01/2024 Policy No.LDC4068970 Endorsement No.

Insured TETRA TECH, INC. Premium $ Included

Insurance Company Safety National Casualty Corporation

Countersigned By ________________________________

WC 43 03 05 (07 00)

© 2000 National Council on Compensation Insurance, Inc.

WORKERS COMPENSATION AND EMPLOYERS LIABILITY INSURANCE POLICY WC 43 03 05

UTAH WAIVER OF SUBROGATION ENDORSEMENT

This endorsement applies only to the insurance provided by the policy because Utah is shown in Item 3.A. of the Information Page.

We have the right to recover our payments from anyone liable for an injury covered by this policy. We will not enforce our right against the person or organization named in the Schedule. (This agreement applies only to the extent that you perform work under a written contract that requires you to obtain this agreement from us.)

This agreement shall not operate directly or indirectly to benefit anyone not named in the Schedule. Our waiver of rights does not release your employees’ rights against third parties and does not release our authority as trustee of claims against third parties.

SCHEDULE