B08_ATTACHMENT_A_SOW.pdf

Mojave National Preserve

San Bernardino County, California

STATEMENT OF WORK:

Supply Road Base Aggregate For Landfair Road.

DATED:

April,18th 2025

Prepared By: Jeremy Petruncio

NATIONAL PARK SERVICE

Mojave National Preserve

MOJA – Import Aggregate Base for Kelso Dunes Rd.

STATEMENT OF WORK FOR IMPORT AGGREGATE BASE

1. OBJECTIVE:

This project consists of delivering approximately 10,616 cubic yards (CY) of aggregate road base conforming to the attached technical specifications (see Appendix A) to the job site and unloading (dumping) the material at the mixing table as directed by the onsite Project Supervisor.

2. PLACE OF PERFORMANCE:

The job site is in Mojave National Preserve, San Bernardino County, CA. Delivery location will be at approximately 35°25'8.22"N, 115°23'2.34"W which is off of Ivanpah Road (see map below). The delivery location is a mixing table on Ivanpah Road, approximately 15 miles south of Interstate-15 (I-15) on Ivanpah & Lanfair Road. Location is accessed from the Nipton Road exit to Ivanpah Road and then south to where the stockpiled material can be seen on the right.

The road is passable by truck. Permitted Work Hours: Monday through Friday, 7:00am – 5:00pm

3. PERIOD OF PERFORMANCE:

All aggregate deliveries shall be completed between October15, 2025 and February 15, 2026 due to peak desert tortoise activity outside of these dates. Safety & Accident Prevention Plan, Sieve Analysis and other administrative submittals may begin as soon as contract is awarded, anticipated late September 2025.

4. PRICE SCHEDULE:

Quotes must include product submittal that meets or exceed salient characteristics in Appendix A. Quotes will be evaluated based on Price (lump sum). Total delivered quantity estimated at 10,616 CY with an uncompacted bulk density of approximately 100 lbs/ft3.

5. TASKS:

Under this contract, the contractor shall complete the following tasks and requirements:

• Provide Safety Plan and materials technical specifications by September 25, 2025.

• Schedule deliveries with the Project Supervisor.

• Deliver aggregate base material meeting the technical specifications to the mixing table as instructed by the Project Supervisor.

• Deliveries must be at the rate specified by the Project Supervisor such that NPS equipment operators can stockpile.

• Trucks must stay on the road. Damage to native vegetation will not be allowed.

6. DELIVERABLES:

• Submit Safety & Accident Prevention Plan

• Submit sieve analysis including Plasticity Index (PI) with quote and after every 5,500 CY an updated sieve analysis with PI shall be submitted prior to delivery. This must be approved by the COR before delivery will be scheduled/accepted.

• Approximately 10,616 CY of aggregate material meeting the technical specifications in Appendix A.

7. SAFETY:

This contractor is to follow at a minimum all OHSA rules and procedures. A required safety plan must be submitted and approved before any work is to begin. This plan shall identify any hazards related to the work and provide measures to follow to mitigate risk.

8. OTHER UNIQUE REQUIREMENTS:

Each delivery drivers shall receive Desert Tortoise training once inside the park boundary by NPS Staff. It is anticipated that each training last approximately 10 minutes. Each driver need only take the training once during the contract performance period.

9. QUALITY ASSURANCE REQUIREMENT:

The government will periodically evaluate the contractor’s performance in accordance with the statement of work. While performing work, the contractor shall comply with the latest applicable versions of the following:

• MUCTD Standards and Policies

• Occupational Safety and Health Administration (OSHA) requirements

Additional Requirements:

• Any damages to property or park resources will be fixed and repaired at no cost to the government.

• Drivers will abide by all direction given for protection of the desert tortoise according to the Park’s Wildlife Biologist.

10. PROJECT PERSONNEL:

Park Facility Manager:

Jeremy Petruncio NPS Mojave National Preserve 2701 Barstow Road Barstow, CA 92311 Telephone: (760) 252-6142 Email: Jeremy_petruncio@nps.gov mailto:Jeremy_petruncio@nps.gov

Appendix A. Surface Course Aggregate

Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming to the following:

(1) Los Angeles abrasion, AASHTO T 96 50% max.

(2) Soundness of aggregate using sodium sulfate, 12% loss max.

AASHTO 104 (5 cycles)

(3) Gradation and Plasticity Index, AASHTO T 90 Table 703-3 below

(4) Free from organic matter and lumps or balls of clay

(5) Fractured faces, one or more, ASTM D 5821 50% min.

(6) Liquid limit, AASHTO T 89, Method A 35 max.

(7) Dust ratio: 2/3 max.

Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, will consist of natural or crushed sand and fine mineral particles.

Do not furnish material that contains asbestos fibers.

Table 703-3

Target Value Ranges for

Surface Course Gradation and Plasticity Index

Sieve Size

Percent by Mass

Passing

Designated Sieve

(AASHTO T 27 and T

11)

¾ inch (19 mm) 100 (1)

No. 4 (4.75 mm) 41-71 (6)

No. 40 (425 µm) 12-28 (4)

No. 200 (75 µm) 9-16 (3)

Plasticity

Index (PI) 8 (4)

(1) Statistical procedures do not apply.

( ) Allowable deviations (+/-) from the target values

% passing #200 % passing #40