Relief Operator

U.S. Silica Holdings Inc. is a global performance materials company and is a member of the Russell 2000. The company is a leading producer of commercial silica used in the oil and gas industry and in a wide range of industrial applications. Over its 123-year history, U.S. Silica has developed core competencies in mining, processing, logistics and materials science that enable it to produce and cost-effectively deliver more than 800 diversified products to customers across our end markets.

U.S. Silica's wholly-owned subsidiaries include EP Minerals and SandBox Logistics. EP Minerals is an industry leader in the production of products derived from diatomaceous earth, perlite, engineered clays and non-activated clays. SandBox Logistics is a state-of-the-art leader in proppant storage, handling and well-site delivery, and is dedicated to making proppant logistics cleaner, safer and more efficient. The company has 26 operating mines and processing facilities and two additional exploration stage properties across the United States and is headquartered in Katy, Texas.

ESSENTIAL JOB FUNCTIONS:

ALL AREAS:

• Inspect work area and equipment prior to beginning operation in accordance with MSHA 30 CFR Parts 46, 56, and 62, State, and Company requirements.
• Operates, and controls equipment in accordance with established limits and procedures to

maximize the safe production of silica product.

• Samples and analyzes silica products and takes appropriate action to produce product

within established objectives.

• Adjusts, inspects, and cleans machinery and associated equipment in accordance with

established procedures.

• Performs preventive maintenance and operational adjustments/repairs on all related

machinery and equipment.

• Assists maintenance personnel as required.
• Fuels, lubricates, and makes operating repairs and adjustments to equipment as required.
• Performs daily cleanup and wash downs with frequent use of high-pressure water lines to

control dust exposures and maintain housekeeping and plant appearance.

• Complete required reports at the designated times and areas

Wet/Dry:

• Achieve and maintain State Certification as a "Surface Mine Supervisor"
• Operate pit pumps and equipment as required (Mine Operator have primary responsibility

for operating the Mining Area).

Milling:

• Manufacture, in-plant transportation, storage, and testing of in-process and finished

products

• To determine the grade requirements, processing sequence, grinding circuit allocation, and

product destination

• Release of Sil-Co-Sil bulk truck shipments on the basis of sieve analysis results of individual

trucks.

Micron Bagging:

• Prepares bags for filling and operates packaging equipment, palletizers, stretch wrappers,

and related equipment, and also hand-stacks bags to insure sand bags are stacked properly

on pallets and/or slip-sheets and prepared for storage and shipment.

• Removes broken bags from bagging circuit. Cleans and disposes of waste bags and sand as

required.

• Makes programming changes and adjustments to ink-jet printers and label machines used in

identifying lot numbers, products, etc.

• Moves palletized bags in palletizing areas and warehouses using forklift.
• Performs laboratory tests and analysis on silica products and adjusts processing machinery,

associated equipment, and product flow accordingly.

• This position physically requires repetitive lifting, turning, and placement of packaged silica

sand products weighing approximately 50 pounds per package and frequent use of high-pressure water lines

Bulk Loading / Unloading:

• Spots, inspects, cleans, loads, and seals railroad cars in accordance with established

procedures, operating requirements, and shipping schedules.

• Loads trucks in accordance within established procedures.
• Provides assistance in resolving problems or questions regarding the truck scale

system.

• Operate the railcar mover and perform raw sand unloading duties as required

RESPONSIBILITIES:

• To accept or reject a truck or rail car based on the pre-loading inspection
• To document the contents of rail cars- both product loaded and tonnage
• Report any equipment damage.
• Report any variation in operating limits that cannot be brought within acceptable limits

using standard procedures.

• Report any breakdown.
• Report any unsafe working condition.
• Report any dust leak or significant product spill requiring immediate attention
• Report any accident or injury on Company property.
• Report any condition or event that prevents completion of assigned tasks in a timely,

efficient, and safe manner.

U.S. Silica is an equal opportunity employer for all without regard to race, gender, color, religion, national origin, disability, veteran status, or any other characteristic protected by applicable federal, state, or local law. U.S. Silica is a smoke- and drug-free workplace. The above description is intended to capture the essential functions of the job, nature and level of work as of the preparation date. It is not intended to be an exhaustive list of all duties that may be required of the position. This job description may be modified at any time with or without notice. U.S. Silica is an equal opportunity employer for all without regard to race, gender, color, religion, national origin, disability, veteran status, or any other characteristic protected by applicable federal, state, or local law. U.S. Silica is a smoke- and drug-free workplace. The above description is intended to capture the essential functions of the job, nature and level of work as of the preparation date. It is not intended to be an exhaustive list of all duties that may be required of the position. This job description may be modified at any time with or without notice.