Attachment_1_-_Specifications.pdf

Mojave National Preserve

San Bernardino County, California

Specifications:

Import Aggregate Road Base

Prepared By: Marcus Anderson

NATIONAL PARK SERVICE

Mojave National Preserve

STATEMENT OF WORK FOR IMPORT AGGREGATE BASE

1. BACKGROUND

Mojave National Preserve is located in San Bernardino County east of Barstow, CA. Job Site is approximately 6 miles off Interstate 15. On Ivanpah Rd.

2. OBJECTIVES:

This project consists of delivering aggregate base material conforming to the attached technical specifications (Appendix A) to the job site and unloading (dumping) the material on the road surface as directed by the onsite Project Supervisor.

3. PLACE OF PERFORMANCE:

Job sites in Mojave National Preserve, San Bernardino County, CA Google earth grid 35 25’14 N 115 23’04 W g

4. PERIOD OF PERFORMANCE:

All tasks and deliverables for this contract must be completed between the dates of September 30, 2023 to March 1, 2024. At the park’s discretion during desert tortoise active season, trucks may be required to follow an escort vehicle and driver provided by NPS to avoid desert tortoise impacts. Must be in groups for escorting unless Park escort, COR and CO allows for such time for individual escorts.

Permitted Work Hours: Monday through Friday, 7:00am – 5:00pm

5. SCOPE:

This project consists of delivering aggregate base material conforming to the attached technical specifications (Appendix A) to the job site and unloading (dumping) the material on the road or staging area surface as directed by the onsite Project Supervisor. Staging area will be a tiered stockpile (backing up on graded and sloped stockpile to dump). Deliveries will be staged at the park’s discretion in order to give NPS equipment operators adequate time to spread, water, and roll compact the material.

= An estimated (6,000 Ton) = 4,285.71429 cubic yards of aggregate base material conforming to the technical specifications in Appendix A are expected to be required to be delivered to job site in quantities to be specified by the Job Supervisor. We expect approximately all of the total delivered to job site. Bids will be evaluated on the basis of cost per cubic yard delivered to the job sites with total delivered quantity estimated at 4,285.71429 cubic yards with an uncompacted bulk density of approximately 100 lbs/ft3.

6. TASKS:

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

• Provide workplan and materials technical specifications by September 25th,2023.

• Schedule deliveries with the Project Supervisor.

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

• Place material along the unpaved road as instructed by the Project Supervisor.

• At the Park’s discretion, trucks may be required to follow a pilot car during desert tortoise active season.

• Deliveries must be at the rate specified by the Project Supervisor such that NPS equipment operators can spread, water, and roll the delivered material. Stockpiling will not be allowed.

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

7. DELIVERABLES:

• Approximately 4,285.71429 cubic yards of aggregate material meeting the technical specifications in Appendix A.

• Require geotechnical lab report on material including Plasticity Index with bid. Lab reports at our discretion up to 8 tests on material being supplied with Plasticity Index.

8. GOVERNMENT-FURNISHED PROPERTY, MATERIAL, EQUIPMENT, OR INFORMATION

(GFP, GFM, GFE, OR GFI):

N/A

9. 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.

10. SECURITY:

N/A

11. TRAVEL:

Contractor shall be responsible for all travel related expenses for this project, including mobilization of equipment, tools, materials, manpower, lodging, meals, and per diem.

12. SPECIAL MATERIAL REQUIREMENTS:

See Appendix A.

13. OTHER UNIQUE REQUIREMENTS:

Contractors will receive Desert Tortoise training.

14. QUALITY ASSURANCE REQUIREMENT:

The contractor shall develop and maintain a quality assurance program to ensure services are performed in accordance with commonly accepted standard practices and in compliance with all applicable code. The contractor shall develop and implement procedures to identify and prevent defective workmanship. As a minimum the contractor shall develop quality control procedures addressing the critical areas identified in this statement of work. 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:

• NFPA 101 (National Fire Protection Association's Life Safety Code)

• 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.

15. PROJECT PERSONNEL:

Contracting Officer:

Michelle Bennett

NPS LAKE MABO

Telephone: (702) 293-8909 Email: michelle_bennett@nps.gov

Contract Specialist:

Caleb Overbaugh

NPS LAKE MABO

Telephone: (801) 696-0366 Email: caleb_overbaugh@nps.gov

Park Facility Manager:

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

Project Supervisor:

Jerry Crouch or Marcus Anderson Mojave National Preserve Telephone: (714) 785-4686 or (760) 252-6151 Email: marcus_anderson@nps.gov or jerry_crouch@nps.gov mailto:michelle_bennett@nps.gov mailto:Jeremy_petruncio@nps.gov mailto:marcus_anderson@nps.gov mailto:jerry_crouch@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 (LL), 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