19-09-REVISED Exhibit H Statement of Work Rev 10.14.pdf

Revised dated 10/14/25

Exhibit H - Statement of Work

Renewable Natural Gas

Document Control # Workflow ID Revision #

NSF-4190 3060652 3

Effective Date: 8/28/2025

Name Title

Originator: Artie Scott Business Analyst, Engineering & Technical Service

Approver: Trey Walker VP Capital Programs

Revision # Description Initials Date

3 Approver Change AS 08/28/2025

2 Editorial Changes AS 07/02/2025

1 Update to current format, update requirements TES 06/18/2025

0 Initial Release GT 01/29/2018

DART Engineering

NSF-4190

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Renewable Natural Gas Rev# 3

Table of Contents

1.0 General Information

A. Introduction

B. Background

C. Scope

D. Reference Documentation

E. Definitions / Abbreviations

2.0 Work Requirement

A. Technical Requirements

3.0 Deliverables

A. Contractor Deliverables

B. DART Deliverables

4.0 Supporting Information

A. Place of Performance

5.0 Packaging

Tables Table 1 - Fuel Volumes, Estimated from Mileage Table 2 - DART Bus Fueling Facilities

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1.0 General Information

This Statement of Work (SOW) describes the acceptance of renewable natural gas (RNG), or biogas, to blend with fossil-fuel derived natural gas at the Compressed Natural Gas (CNG) fueling stations which support DART’s bus fleet.

A. Introduction DART has a strong commitment to progressive clean fuel programs and seeks a partner to enhance its environmental initiatives and share the benefits. The Contractor will provide renewable natural gas for fueling DART’s transit buses.

B. Background

1. DART is committed to a sustainable future through the development and implementation of its Sustainability Policy. Through this commitment, renewable natural gas was introduced as a bus fuel in 2019. As DART moves forward with its bus replacement program, it will continue to purchase CNG buses.

2. The CNG fueling stations are operational twenty-four (24) hours per day, seven days per week, including holidays. Peak fueling at the three facilities are as follows:

a. Northwest, East Dallas and South Oak Cliff peak fueling period is from 7:00 p.m. to 4:30 a.m. daily.

C. Objectives

1. Secure a reliable supply of RNG (CNG-equivalent) to meet DART’s annual volume requirements.

2. Obtain and transfer on behalf of DART all D3 RINs generated by that RNG.

3. Ensure full Renewal Fuel Standard (RFS) compliance, accurate measurement and reporting, and transparent pricing.

4. Support DART’s sustainability goals and potential revenue from RIN monetization.

D. Scope

The Contractor shall provide to DART RNG environmental attributes at no cost and compensate DART through a share (or fixed rate) of revenues generated from the sale of resulting renewable fuel credits (RINs). The revenue mechanism is a “Dispensing Fee” to DART equal the agreed percent (%) of RIN Revenue, payable for each month of the Delivery Period.

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E. Reference Documentation None

F. Definitions / Abbreviations

Abbreviation Description

Biomass Methane from decomposition of plants, animals, and waste

CNG Compressed Natural Gas

D3 A classification of renewable natural gas from cellulosic biofuels, i.e., plant waste

GGE Gasoline Gallon Equivalent

GLO Texas General Land Office

HHV Higher Heating Value

LHV Lower Heating Value

MMBTU Million BTUs

RIN Renewable Index Number

RNG Renewable Natural Gas

SOW Statement of Work

EMTS EPA’s Moderated Transaction System for RIN generation and trading.

2.0 Work Requirement

A. Technical Requirements

1. Fuel Specification

i. The Contractor shall provide to DART environment supply gaseous methane from biomass (RNG) sources to DART.

Pipeline required for vehicle fuel.

ii. The Contractor shall supply pipeline quality natural gas through existing pipelines utilized by ATMOS Network.

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iii. Contractor shall deliver the RNG that meets the receiving utilities gas quality and RNG interconnect standards in effect at the interconnection point.

iv. The Contractor shall comply with DART operations and safety requirements applicable at each facility.

v. Contractor shall respond to any related non-conformance notices within 48 hours.

2. RIN Generation & Transfer

i. Contractor shall ensure adherence to the Environmental Protection Agency (EPA) and their Renewable Fuel Standard (RFS) program policy. Contractor shall be responsible to provide RNG credits information through

EPA.

ii. Contractor shall hold EPA registration for the D3 pathway and generate D3 RINs in EPA’s EMTS.

iii. The Contractor shall secure the RNG sourcing pathway approval and RIN generation.

iv. Contractor shall provide monthly RIN confirmations and account statements to DART.

3.0 Deliverables

A. Contractor Deliverables

1. Contractor shall commit to provide renewable natural gas fuel to DART at the approximate amounts shown in Table 1 below.

Table 1 - Fuel Volumes, Estimated from Mileage

Year

MMBTU

Estimated GGE**

2026 1,076,300 9,432,695 2027 1,026,417 8,995,519 2028 1,029,179 9,019,723 2029 1,029,179 9,019,723 2030 1,029,179 9,019,723

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* Projections for 2029 and 2030 are based on 2028 estimates

* ** 8.764 MMBTU = 1 GGE

2. Contractor shall maintain and provide regular documentation of statements from renewable natural gas (biogas) deliveries.

3. Contractor shall maintain and provide regular documentation of statements showing the revenue returned to DART.

The frequency of these statements – monthly will be mutually agreed upon by DART and the Contractor.

i. DART prefers monthly Statements showing the monthly RIN awards and their value to ensure accurate recording.

ii. Statements may be transmitted by e-mail, electronically, or via a secure web-based portal.

B. DART Deliverables At each reporting period, DART will provide the following:

1. Monthly usage reports, downloaded from the fuel provider’s website (Atmos or the GLO).

2. Affidavits, affirming the amount of fuel dispensed per the monthly report.

These will be forwarded electronically to the Contractor. Hard copies will be made available upon request.

4.0 Supporting Information

A. Place of Performance Fuel shall be dispensed at each of the three facilities below:

Table 2 - DART Bus Fueling Facilities

Facility name Street Address Meter Number

East Dallas 4127 Elm Street, 75206 80-3155642

Northwest 2424 Webb Chapel Extension, 75220 80-3170434

South Oak Cliff 3422 E. Kiest Blvd., 75208 80-3164821