AT OUR

CORE

2013 SUSTAINABILITY REPORT U.S. SILICA // AT OUR CORE // SUSTAINABILITY REPORT 2013

A

AT OUR

CORE

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A MESSAGE FROM OUR CEO Conducting business in a sustainable manner is a guiding principle at U.S. Silica – constantly innovating, being a good steward of our environment, dedicating

ourselves to partnering with our communities, and making our facilities even safer and more rewarding places to work.

As our company grows, we commit to managing the environmental, economic, and social impacts of our operations. We will continue to improve our environmental

performance by reducing our use of natural resources and by increasing recycled materials while minimizing emissions to air and water. To maintain our reputation as a good corporate neighbor, we will continue to partner with our communities by donating time, materials, and financial resources to local charities and

organizations. And to ensure our long-term viability, we will remain invested in

reserves for our future operations and in providing the safest working environments for our employees.

In 2013, we made sustainability strides by implementing conservation programs for water and fuel and by significantly reducing greenhouse gas emissions. This was

in part due to our emphasis on technology and commitment to seizing opportunities that maximize efficiency and limit excess waste. While our performance was

strong, we still have areas of improvement. For example, while our safety program

performance was better than industry average, we still strive for world-class. These are the drivers that motivate us to push harder and to surpass our goals. In our second year as a publicly-traded company, U.S. Silica has grown

tremendously. We entered new markets by creating innovative new products and we increased our number of transload sites, allowing us to be more efficient for

our customers. These accomplishments set us apart as an industry leader, and

we are proud to continue delivering the highest-quality products to the oil and gas,

glass, foundry, and electronic industries. We expect and look forward to seeing this growth continue into the foreseeable future.

We ask ourselves constantly who we are and what is important to us as a company – who we are “at our core.” And at our core, we believe that being a sustainable

business and a responsible environmental steward is what makes us both different and successful.

Bryan Shinn, President & Chief Executive Officer

A MESSAGE FROM OUR ENVIRONMENTAL LEADERS We are thrilled to present our 2013 Sustainability Report, “At Our Core,” and the data, anecdotes, and key learnings from the last year. As the title suggests, we

are a company that practices and promotes sustainable operations at every level and within every department. Collecting this information reminded us of just how forward-looking U.S. Silica has been over the last 100 years.

As a company, U.S. Silica recognizes and believes that we have a responsibility to be a cornerstone of the communities we call home; we believe we have to do

more than just comply with environmental requirements – we have to continuously improve performance and constantly find ways to minimize our environmental

footprint. And we believe that we must maintain the strong values and ethics on

which we were founded, while finding innovative and creative ways to expand our reach and deliver value to our customers in a 21st century marketplace.

Sustainability isn’t just a buzzword here. It’s a guiding principle for how we

operate and how we stand out from the rest. It’s how we find ways to increase

efficiency and build for the future, and how we respect our environment and our

communities. Ultimately, it’s the result of team members from across the country who, through their hard work and expertise, make this a vibrant and growing company, and we thank them for what they do every day.

David Clauson, Senior Manager, Environmental Programs

Kevin Mooney, Director, Environmental Health & Safety

TABLE OF CONTENTS 1

THE U.S. SILICA TRADITION 9 Who We Are 10 A Drive for Sustainability 13 Bold Goals 14

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COMMITTING TO ENVIRONMENTAL STEWARDSHIP

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Reducing Our Carbon Footprint 20 Protecting Our Natural Environment 22

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Case Study: Waste Stream Reduction

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PROMOTING SAFE AND RESPONSIBLE OPERATIONS

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Investing in Safety 30 Safety in Action 31 Results-Based Strategies 32 4

BUILDING STRONG COMMUNITIES 37 Partnering With Our Neighbors 38 Giving Back to Our Communities

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Supporting Our Local Economies 41 5

ENSURING OUR LEGACY 45 Expanding Our Network 46 Cultivating Future Leaders 48 Case Study: U.S. Silica Sparta

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LOOKING AHEAD TO 2014 55

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APPENDIX 59

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TRADITION

THE U.S. SILICA TRADITION Since our founding more than 100 years ago, U.S. Silica has been committed to excellence.

From the late 1800s, when Henry Harrison Hunter won a blue ribbon for the purity of his first

sand sample, until today, we have experienced tremendous growth, building our company as an

industry leader. In 2013, we continued to innovate and grow, and our success in our second year as a publicly traded company led Forbes Magazine to name U.S. Silica in the top ten of the 100 Best Small Companies in America.

Our standards have remained high since that first blue ribbon. We are continually striving to

provide the safest, most cost-efficient operations; to produce and transport high-quality industrial minerals to our customers around the world; and most importantly to innovate – for and with our customers, employees, and communities.

As we look toward the next 100 years, we are committed to strengthening our place as a leader in industrial minerals innovation, while embracing the challenges and opportunities that come hand in hand with progress.

Hurtsboro, AL

Mill Creek, OK

Chicago, IL

Mapleton Depot, PA

Ottawa, IL

Columbia, SC

Rochelle, IL

Jackson, TN

Dubberly, LA

Houston, TX

Frederick, MD

Kosse, TX

Rockwood, MI

Montpelier, VA

Pacific, MO

Sparta, WI

Mauricetown, NJ

Berkeley Springs, WV

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VISION AND GUIDING VALUES

OUR PROCESS

We are committed to the efficient,

goals and processes have remained the same. We

responsible use and recovery of natural resources. To that end, we strive to uphold the following principles:

»» We value our employees by providing

In the century since our founding, we have created new products and materials, but our fundamental mine, clean, and dry sand that is found primarily near the surface. The sand is sized in a variety

of ways according to our customers’ needs using specific mining techniques based on the geology

a safe and healthy work environment

and type of sand. No matter the technique or end

opportunities for employee growth

protection are paramount throughout our operations.

with fair pay and benefits along with

product, safety, energy efficiency, and environmental

and development.

EVERYDAY USES

»» We strategically and wisely invest our resources as a trustworthy partner to

enrich our communities and to leave a strong and lasting legacy.

»» We produce the highest-quality raw

materials that contribute to the quality of life in our communities while managing our facilities with a present and future focus on environmental stewardship.

»» We help our customers and other

stakeholders meet their business goals through innovative solutions.

U.S. Silica’s products are an integral part of daily life. Our 250 unique products and performance materials are used in a variety of industries and applications. »» Our high-quality proppants improve the

productivity of oil and gas wells through improved flow rates and recovery from unconventional wells.

»» Glass products experience improved

performance thanks to our quality procedures and specifications.

»» Wind power and solar energy are more economical because of cost-effective manufacturing processes.

»» Paints and coatings are more durable due to the quality of our materials.

»» Geothermal wells are more efficient because of improved heat transfer.

»» Electronic devices are more scratch resistant because of our product customization.

»» High-performance metal parts are made more uniform due to our strict product and quality control.

»» The high-quality and consistency of our sand

products allows for a variety of foundry and coremaking applications.

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BRYAN SHINN President & Chief Executive Officer

J.P. BLANCHARD Vice President & General Manager of Industrial Specialty Products

DON MERRIL Vice President & Chief Financial Officer

MIKE WINKLER Vice President & Chief Operating Officer

BRAD CASPER Vice President of Strategic Planning

CHRISTINE MARSHALL Corporate Secretary & General Counsel

CORPORATE MANAGEMENT AND GOVERNANCE U.S. Silica’s corporate governance structure ensures adherence to the highest standards of excellence. Our Executive Management Team, overseen by

our Chief Executive Officer, transforms corporate

DAVE MURRY Vice President of Talent Management & Chief Human Resources Officer

JASON TEDROW Vice President of Supply Chain

strategies and policies into action in collaboration with our senior management team.

Our Board of Directors is responsible to

shareholders for the oversight of the company and ongoing accountability and transparency.

DON WEINHEIMER Vice President & General Manager of Oil & Gas

ADAM YOXTHEIMER Vice President & Chief Administrative Officer

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ASSOCIATIONS AND MEMBERSHIPS At U.S. Silica, we know how important it is to play an active role in the communities where we live and do business. Being a part of local and industry associations gives us the opportunity to participate and learn

alongside our most important stakeholders and colleagues. We are proud to be members of the following organizations:

INTERNATIONAL AND NATIONAL ORGANIZATIONS

STATE AND LOCAL ORGANIZATIONS

Alliance for Rail Competition

Berkeley Springs, WV Rotary Club

American Ceramic Society

Hanover, VA Association of Business

American Chemical Society

Hanover, VA Chamber of Commerce

American Foundry Society

Illinois Association of Aggregate Producers

American Payroll Association

Jackson, MO Chamber of Commerce

American Society for Quality

Michigan Aggregates Association

American Water Works Association

Michigan Chamber of Commerce

Casting Industry Suppliers Association

Minden, LA Chamber of Commerce

Glass Manufacturing Industry Council

Mining Association of South Carolina

Glass Producers Transportation Council

New Jersey Business & Industry Association

Industrial Minerals Association – North America

Oklahoma Aggregates Association

Institute for Hazardous Materials Management

Ottawa, IL Chamber of Commerce

Institute for Supply Management

Ottawa, IL Rotary Club

Lions Club International

Pacific, MO Chamber of Commerce

Mining Industry Council

Pennsylvania Aggregates & Concrete Association

National Association of Environmental Managers

Pennsylvania Independent Oil & Gas Association

National Association of Manufacturers

South Carolina Chamber of Commerce

National Industrial Sand Association

Sparta, WI Area Chamber of Commerce

National Safety Council

Texas Mining & Reclamation Associates

National Sand, Stone & Gravel Association

Virginia Transportation Construction Alliance West Virginia Crushed Aggregates Council West Virginia Manufacturers Association Wisconsin Industrial Sand Association

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U.S. SILICA ENVIRONMENTAL POLICY

A DRIVE FOR SUSTAINABILITY

We are committed to a clean,

Running a sustainable business means making smart

healthy environment. We believe

that a commitment to environmental matters benefits our customers, our shareholders, our employees, and

the communities we serve. We also believe that proper concern and

regard for the environment is an

essential element of a successful

business strategy. We will actively implement the Environmental

Quality Management Program.

POLLUTION PREVENTION We are dedicated to the prevention of pollution resulting from our

operations. We will employ pollution prevention measures to minimize

the impact of our operations on the environment. We will minimize risk to our employees and surrounding communities by employing

safe operating procedures and

technologies and by incorporating emergency preparedness procedures.

choices that support our communities, ensure the safety of our workers, and protect our environment. We have

made substantial progress in promoting and implementing sustainability programs over the past year. Our efforts focus on four main categories: environment, safety, community, and our legacy.

»» We reduced our greenhouse gas emissions, and we recycled more than two million pounds of waste.

»» We worked with our employees to improve our safety programs, resulting in a reportable incident rate that decreased more than ten percent from 2012.

»» We supported the people and families around us by investing more than $44 million into our local economies.

»» We grew tremendously, expanding our customer base

through the creation of new products and the opening of 17 additional transload facilities.

We don’t just set goals. We build an infrastructure to ensure we meet them. Our sustainability efforts are

led by our Senior Manager of Environmental Programs who oversees compliance and implementation of the

CONTINUOUS IMPROVEMENT

sustainability program. This role’s close coordination

We will strive to continually improve

environmental managers ensures the integrity of our health

our environmental performance, including areas not subject to

regulation. We will regularly report

with plant managers, EHS coordinators, and corporate and safety policies and procedures.

U.S. Silica is committed to long-term sustainability through

our progress to our stakeholders.

our 2017 Bold Goals, which outline our five-year vision for

COMMUNICATION

in key areas. Each year,

We will communicate our

commitment to environmental matters to our employees.

ENVIRONMENTAL COMPLIANCE

improving our performance we set targets for

ourselves that bring

How we define sustainability:

goals. The following

»» Defend our natural environment

us closer to these

pages describe how we

We are dedicated to compliance

performed against our

and local laws and regulations.

and the goals that we seek

with all relevant federal, state, We will continuously evaluate our compliance status with

goals for the year 2013,

»» Protect our workers »» Support our community »» Invest in our legacy

to achieve in 2014.

environmental regulations.

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GOALS AND TARGETS FOR SUSTAINABILITY IN 2013

ENVIRONMENT 2017 BOLD GOAL

Minimize greenhouse gas emissions from U.S. Silica operations by reducing fuel and electricity usage at our plants.

FULLY MET

PARTIALLY MET

NOT MET

2013 TARGET

Engage in a fuel efficiency program at 50% of U.S. Silica plants. Evaluate air permits to determine if emission limits can be reduced based on plant improvements.

Conserve and preserve natural resources such as land, water, and energy.

Implement facility water management and conservation plans at 20% of U.S. Silica facilities.

Reduce, reuse, or recycle 90% of all waste materials resulting from our operations.

Implement recycling program at 50% of U.S. Silica facilities.

Enhance quality of life and prosperity for our employees and communities where we operate.

Implement best practices for energy use in pumping at 20% of U.S. Silica plants.

Evaluate current technology of density gauging and identify opportunities for replacement.

Partner with facilities to recycle purchased products. Evaluate light pollution impact at 20% of U.S. Silica facilities and assess ways to reduce impact.

2013 TARGET ACHIEVED Throughout the report, we will highlight the 2013 Targets and discuss how we achieved them. Look for this marker in the following pages.

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GOALS AND TARGETS FOR SUSTAINABILITY IN 2013

SAFETY AND COMMUNITY 2017 BOLD GOAL

Achieve zero reportable incidents and zero lost time incidents - no one will be injured.

Achieve 100% engagement in sustainability and corporate responsibility.

Actively seek opportunities to volunteer/engage in community activities and triple annual donations to charities.

2013 TARGET

Achieve 1.30 on reportable rate (25% improvement from 2012). Achieve zero lost time incidents. Educate 100% of employees at plant facilities on the purpose and benefits of behavioral-based safety.

Each plant to host three public tours in 2013; all employees responsible for tour-ready conditions. Develop an employee recognition program.

Assess baseline employee volunteer hours. Develop an incentive program to increase total volunteer hours.

LEGACY 2017 BOLD GOAL

Increase the number of sustainable product offerings and expand into new markets.

Integrate triple-bottom line thinking into our operations.

2013 TARGET

Enter one new market based on product research and development. Increase permitted reserves for long-term sustainability.

Develop and implement a Total Preventive Maintenance Program at 20% of U.S. Silica plants. Build leadership capability in line with succession and growth strategy.

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2

ENVIRONMENT

COMMITTING TO ENVIRONMENTAL STEWARDSHIP At U.S. Silica, caring for the environment is inherent in the way we do business. We rely on natural resources to succeed – and so do our customers – which is why

we integrate sustainable practices into every facet of our operations nationwide.

2013 was a pivotal year for identifying smart solutions to enhance our sustainability potential for reducing

greenhouse gas emissions, conserving water usage, and improving air quality. Careful analyses brought to our attention more fuel-efficient equipment and

processes to uphold our commitment to being proactive, environmental stewards.

KEY AREAS OF FOCUS »» Implement fuel efficiency programs and best practices »» Implement water management and conservation plans »» Reduce waste stream »» Evaluate and identify opportunities to replace key equipment

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REDUCING OUR CARBON FOOTPRINT Because we are committed to minimizing

To further reduce our GHG emissions

always working to reduce the greenhouse

so that our products make nonstop runs

our impact on the environment, we are gas (GHG) emissions from our

operations. In 2013, we concentrated on reducing the amount of electricity, diesel

2013 TARGET ACHIEVED Evaluate current technology of density gauging and identify opportunities for replacement.

fuel, and propane we use, which we

achieved by using smart technology for

pump controls, investing in more energyefficient technology, and increasing our use of high-efficiency lighting. These

efforts have been extremely successful, resulting in a 3.3% reduction in GHG

emissions since 2012 and more than a

we operate unit trains whenever we can

between their origin and destination. Unit trains are the smartest way to transport. They significantly reduce the amount of

pollutants emitted compared to traditional freight service, in addition to saving us and our customers time and money.

In addition to reducing GHG emissions,

we also work to offset carbon emissions by partnering with our communities on

beautification projects and tree plantings.

10% reduction since 2009.

FEWER GHG EMISSIONS EACH YEAR (LBS PER TON OF PRODUCT SOLD) 2009

91.6

2010

90.3

2011 2012 2013

86.9 83.8 81.0

Strategic Partnerships Partnering with companies who share our priorities can enhance our sustainability efforts. We are happy to partner with Volvo Group Global, which has an impressive sustainability program, and one that aligns with our business and environmental goals. Thanks to this new partnership in 2013, our operations and equipment are even more energy efficient.

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MAXIMIZING OUR RESOURCES We are proud to report that we exceeded our 2013 Target of formalizing fuel efficiency programs at

sought opportunities related to minimizing our

2013 TARGET ACHIEVED

we successfully reduced the amount of electricity

at 50% of U.S. Silica plants.

half of our facilities. In fact, all 15 of U.S. Silica plants implemented efficiency programs and

natural gas, fuel oil, and electricity usage. In 2013,

Engage in a fuel efficiency program

used per ton of sand that is processed by 10.4%. Building off our efforts in 2012, we continue

to work at the plant level to transition to high-

efficiency LED lighting. This year the Mill Creek, OK plant transitioned to LED lighting, resulting in significantly reduced lighting costs annually. What’s more, LED lighting provides broader

coverage, making safer working conditions for our employees working in the mines.

2013 TARGET ACHIEVED Evaluate light pollution impact at 20% of U.S. Silica facilities and assess ways to reduce impact.

LEVERAGING TECHNOLOGY An audit of our water pumping systems at

our Columbia, Dubberly, and Sparta plants

identified opportunities where we can use less electricity and water. That included replacing

outdated pumps with more efficient equipment,

implementing pumping plans, and utilizing smart pumping technology. Once fully implemented,

these opportunities represent a potential savings of 3.5 million gallons of water and $350,000 annually. We are always looking to improve

2013 TARGET ACHIEVED Implement best management practices for energy use in pumping at 20% of U.S. Silica plants.

our best practices and make smart capital investments to achieve optimal efficiency.

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PROTECTING OUR NATURAL ENVIRONMENT Being good environmental stewards also means protecting air quality and minimizing our water use, something that has always been a top priority at U.S. Silica.

AIR QUALITY U.S. Silica has air

Industry Award Clean Air Connection Award In Berkeley Springs, WV, our proactive approach to air monitoring led us to receive the first Michael J. Ball Clean Air Connection Award. The site was nominated by the Bath Town Council for consistently meeting or exceeding emission standards, and for reducing dust, greenhouse emissions, and energy consumption.

permits in place at 100% of our

facilities to regulate

100% of facilities have air permits

particulate matter and other emissions from

our mining and processing operations. We maintain

compliance with these permits by performing regular monitoring and maintenance activities and by the

intelligent use of design techniques and technology to reduce emissions. We hold ourselves to the highest

standard of compliance to protect our environment and the health of those around us.

In addition, U.S. Silica performed ambient air sampling near several of its facilities in 2013. This sampling

showed levels of airborne silica near our plants well

below limits set by regulatory agencies. For example, monitoring data near our Sparta, WI facility showed an average airborne concentration of

particulate matter (PM10) of

less than 10% of the allowed limit.

Sparta ambient air emissions are 90% below regulatory limits

This is an important part of U.S.

Silica’s commitment to the health

and safety of our workers and communities. We will continue to monitor our operations and emissions closely and will persist in finding opportunities to further minimize potential impact.

2013 TARGET ACHIEVED Evaluate air permits to determine if emission limits can be reduced based on plant improvements.

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WATER MANAGEMENT In 2013, we aimed to develop water management plans at 20% of our

facilities. We are excited to report that Mapleton Depot, PA, Pacific, MO, and Ottawa, IL each implemented water management plans through

innovative, holistic recommendations for more efficient water use. As an example, the Mapleton Depot plant identified opportunities for a semi-

closed circuit system, reducing the amount of water pumped from the local Juniata River.

9M

gallon reduction of annual water use at Mapleton Depot

As we reduce our water use, we remain diligent that the water we release meets quality expectations, and is in strict compliance with local water

standards. It’s our responsibility to do no harm to the community water supply and to protect the well-being of our neighbors.

NATURAL HABITAT PRESERVATION

2013 TARGET ACHIEVED

Because U.S. Silica’s operations are inextricably linked to the earth, we

Implement facility

environment is always changing, so we remain aware of local habitats,

conservation plans at 20%

take great care to protect natural habitats and wetlands. Our natural

water management and

such as those in the local streams, to actively monitor them and to adapt

of U.S. Silica facilities.

our operations as necessary.

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CASE STUDY

WASTE STREAM REDUCTION In 2013, we set a bold target of implementing comprehensive waste

recycling programs at half of our facilities. Thanks to the commitment of employees and the partnerships with local organizations, we

achieved that target and much more. This effort required not only strategic decisions and research, but deliberate engagement on behalf of our employees and community partners.

FROM THE GROUND UP At U.S. Silica, our facilities generate relatively little waste, but

we know there is always room for improvement – a principle that

2013 TARGET ACHIEVED Implement recycling programs at 50% of U.S. Silica facilities.

resonates across all of our operations. So we started at the plant

level, knowing that our employees are the best resource to identify recycling opportunities. We discovered that many of our waste

streams, from office paper to scrap steel, can be re-purposed. Due

to so many of our waste streams being recyclable, we were able to establish recycling programs at all of our production facilities and recycled an estimated total of more than 2 million pounds of waste in 2013.

At U.S. Silica, recycling 2 million pounds of waste in 2013 means:

»» Our team collectively recycled more than 1 million pounds of scrap steel.

2M

pounds of waste recycled

»» We recycled 100 tons of cardboard and paper. »» We offset most of our overall waste disposal costs.

2013 TARGET ACHIEVED Partner with facilities to recycle purchased products.

To ensure our communities receive the greatest benefit from our

recycling efforts, employees at every plant identified local partners to help us re-purpose or recycle materials. In 2013, the Mill Creek, OK plant found a local partner to re-purpose old electric cables, and another that purchases used oil to create alternative fuel. These

efforts help us to engage local business partners and reinvest in our communities.

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SAFETY

PROMOTING SAFE AND RESPONSIBLE OPERATIONS Protecting the health and safety of our employees is central to our business, and a top priority every day. Whether

through our forward-looking decision-

based safety system or our commitment to reducing lost time incidents, we work hand in hand with our employees to

create the safest working conditions possible.

KEY AREAS OF FOCUS »» Invest in safety training and safety systems »» Reduce reportable injuries and lost time »» Cultivate and grow leadership

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INVESTING IN SAFETY Safety is an integral part of our company, and as such

we make significant investments annually in programs

and systems that help ensure a safe environment for our employees. In 2013, we spent in excess of $4 million on

safety equipment and employees dedicated to this effort.

Never far from top of mind, we are investing in state-of-the-

art dust collection systems, facility-level audits, focused staff

training programs and specialized rail safety consultants, just to name a few.

Providing expert resources also helps protect the safety of

our employees and our environment. 100% of our facilities

have employees serving as Environmental Health & Safety

(EHS) Coordinators. Our 15 EHS Coordinators play a critical role in maintaining safe and reliable operations by working

with site leadership and personnel to continuously improve site safety and environmental performance.

EHS Coordinators are trained on regulatory changes and

industry standards, but perhaps their best education comes from each other. Our coordinators communicate daily to exchange best practices, stories, and suggestions. By

working together, we can raise the safety standards of the company as a whole.

100%

OF FACILITIES HAVE AN EHS COORDINATOR 30

SAFETY IN ACTION At U.S. Silica, we turn our ideas into actions. With

the right people and with the right tools, our plants have the resources and support to develop the safest working environments.

We believe that when it comes to safety, we learn best from each other. For example, workers in

our Hurtsboro, AL facility gather once a week to

conduct safety audits, promoting a safe working

environment for themselves and their coworkers. In fact, safety audits take place at 100% of

our facilities, meeting our goal of educating

our employees on the purpose and benefits of behavioral-based safety.

We encourage employees to observe each other

performing routine tasks and to point out potential problem areas, such as a body posture or a habit that might lead to injury.

At the same time, our facilities host monthly

Environmental Health and Safety councils with employees from every department to discuss safety performance, workplace observations,

and lessons learned. This collaborative process challenges us to be aware and proactive in

identifying best practices to better protect our workers.

2013 TARGET ACHIEVED Educate 100% of employees at plant facilities on the purpose and benefits of behavioral-based safety.

Personal Air Sampling At our facilities, personal air sampling is one of many methods we use to monitor the health and safety of our employees. Using portable pumps worn by an employee during his or her shift, we obtain air samples representative of that individual’s potential exposure to airborne dust.

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RESULTS-BASED STRATEGIES By working to make our workplace conditions as safe as possible, and by

educating our employees on safe operations, we prevent injuries from happening. We are proud to report that in 2013, our total reportable incident rate was down

more than 10% from the previous year. That is a marked improvement. However, we reported an increase in our lost time incident rate. What this tells us is that

1.2M hours without a lost

while we outperformed the sand and gravel industry averages, there is still room

for improvement. We will continue to work toward our target of achieving zero lost

time incident at the Mauricetown, NJ facility

time incidents.

TOTAL REPORTABLE INCIDENT RATE U.S. SILICA 1.78 INDUSTRY AVERAGE 2.21*

LOST TIME INJURY RATE U.S. SILICA 0.3 INDUSTRY AVERAGE 1.55* *Source: MSHA

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Safety Awards Certificate of Achievement in Safety Mine Safety and Health Administration COLUMBIA, SC DUBBERLY, LA MAPLETON DEPOT, PA MAURICETOWN, NJ MILL CREEK, OK

Recognition of Excellence in Safety National Safety Council COLUMBIA, SC

Rock Solid Safety Award, Gold Level Illinois Association of Aggregate Producers OTTAWA, IL

Outstanding Safety Mining Association of South Carolina COLUMBIA, SC

2013 U.S. Silica Sands of Time Safety Award DUBBERLY, LA SPARTA, WI MAURICETOWN, NJ

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4

COMMUNITY

BUILDING STRONG COMMUNITIES U.S. Silica has a long history of being

involved in the community. At the core of our business is a drive to be good neighbors and to support the people and families around us. Whether it’s by partnering

KEY AREAS OF FOCUS »» Support local communities through philanthropy, material donations, and volunteerism

with local businesses, making charitable

»» Educate communities through public tours of facilities

ourselves on fostering strong relationships

»» Implement employee engagement and recognition programs

contributions, or hiring locally, we pride with our community.

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PARTNERING WITH OUR NEIGHBORS In order to uphold our commitment to neighbors, we want to engage directly with

them. We want to teach our communities about what we do, in addition to hearing

their concerns and learning how we can help. Through facility tours and community outreach, we are able to do both.

Each of our production facilities, as well as our Frederick, MD headquarters, works closely with a community outreach committee, which is comprised of local elected

officials, business leaders, and other members of the community. Our 17 committees, made up of nearly 150 individuals, provide unique insight into the needs of the

community, and allow us to better support those around us. Out of these connections

150

the number of local elected officials, business owners, and neighbors that make up our community outreach committees

come meaningful partnerships and long-lasting impacts.

SUPPORTING OUR TROOPS AND FIRST RESPONDERS We saw this commitment in action at two of our sites. Our Kosse, TX facility was one of several plants that partnered with Cell Phones for Soldiers to provide cost-free communication for military members abroad.

By collecting cell phones from our employees and the community, we were able to donate to Cell Phones

for Soldiers, who will then recycle the phones and provide international prepaid calling cards to active duty servicemen and women. U.S. Silica is proud to support the men and women of the U.S. armed forces.

In South Carolina, where the Lexington sheriff’s department was facing budget cuts, we were there to help provide resources for the local community. U.S. Silica’s Columbia facility helped donate a speed detection device to the resident deputy, allowing him to continue keeping local residents safe and meeting a need identified by the community.

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OPENING OUR DOORS Whenever we can, we welcome our neighbors, students and community leaders to tour and

learn about our operations firsthand. In 2013, we hosted thousands of visitors, including the North

Hagerstown High School’s environmental science class for an Earth Day celebration in Berkeley

Springs, WV. Later in the year, our Pacific, MO

plant opened its doors for a Labor Day community celebration. In between the grilling and activities, hundreds of families toured the mine to learn about the facility and the value we bring to

communities. Though we did not meet our target to host three tours per plant, all of our facilities

welcomed members of the community, and we will continue working toward this goal in 2014.

Recognizing Employees as Good Neighbors encourages U.S. Silica employees to nominate each other

2013 TARGET ACHIEVED

for going above and beyond to support the people in our

Develop employee

communities. We look forward to expanding this program

recognition program.

In 2013, we launched the Good Neighbor Award, which

in 2014.

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GIVING BACK TO OUR COMMUNITIES Part of our dedication to communities comes through financial contributions and volunteerism. As such, we encourage our facilities to take the reins in identifying worthy causes close to home. When there is

an organization in need, or if disaster strikes one of our communities, we are proud to be a partner our

neighbors can count on. In 2013, we donated nearly $200,000 to community organizations, 85% of which was given at the site level.

SUPPORT IN A TIME OF CRISIS When the community surrounding our Ottawa, IL plant

experienced unprecedented flooding, we sprang into action.

Facing the rapid rise of the Illinois River, our employees worked quickly to bring sand, bulldozers, and end loaders to vulnerable community sites.

We built flood barriers to protect the local nursing home, high school, and water treatment center. All told, U.S. Silica

donated 422 tons of sand, along with

almost $10,000 worth of equipment and manpower.

422

tons of sand U.S. Silica donated during a flood crisis in Ottawa, IL

SHARING THE HOLIDAY SPIRIT Adopt-a-Family, an organization that provides Christmas gifts and food items to families in need, lost a major local contributor near our Pacific, MO facility. We didn’t hesitate to fill in. U.S. Silica employees donated and delivered $2,000 worth of toys, games, and clothes to Adopt-a-Family, where they were distributed to local families in time for Christmas.

FEEDING THE HUNGRY Last year, our Montpelier, VA facility held a “Fill the Truck Day” in support of the Western Hanover Emergency Action Team (WHEAT), a local food pantry. Our employees spent a day outside of a local grocery store, filling

a U.S. Silica truck with donations from shoppers. At the end of the day, we were able to drive the resulting 654 pounds of donated food to WHEAT.

40

SUPPORTING OUR LOCAL ECONOMIES

Community Awards Commendation of Excellence South Carolina Chamber of Commerce COLUMBIA, SC

Community Relations Award Illinois Association of Aggregate Producers OTTAWA, IL

Certificate of Appreciation Girl Scout Troop 508 DUBBERLY, LA

Plaque of Appreciation Minden Junior League Football DUBBERLY, LA

We have a responsibility to support the local economy of our communities. We

believe that when we partner with a local vendor for goods or services for our

operations, we are doing much more than purchasing a product. We are investing

in the people and businesses that make up the communities we call home.

Supporting local economies means

buying locally, sourcing local materials, and hiring the strong workforce we find

right outside our front door. In 2013 this

commitment translated into investments of more than

$44 million in our local

economies,

and we continue to look for ways to make that

$44M amount invested in our local economies

number grow in the future.

Rewarding Volunteerism Through our newly created Sand Dollars program, U.S. Silica facilities donate $5 to an organization for every hour an employee spends volunteering, up to a maximum of 20 hours.

HIRING LOCALLY We have always placed a priority on

building a high caliber workforce from

the talent that surrounds us. In 2013, we hired 148 new employees, the majority

of which were from our local community. We are proud to support the community

by offering quality jobs to our neighbors.

2013 TARGET ACHIEVED Assess baseline employee volunteer hours and develop an incentive program to increase

75% of the interns we hire come from

our local communities. When they don’t, we still want them to feel like family. We even offer housing for our out-of-town interns in Pacific, MO.

total volunteer hours.

41

5

LEGACY

ENSURING OUR LEGACY Since our founding, we have been committed to innovation and progress, adapting and evolving

along with the industry. In our first year as a publicly traded company, we experienced significant growth, and we have taken steps to ensure this growth continues.

In 2013, we positioned ourselves to better serve our customers by focusing on capital investments and expanding our product offering and geographic reach. We continue to grow our research

and development efforts, harnessing new and changing technology. By leveraging technological

advances that weren’t around a century or even a decade ago, we are able to adapt and grow our business to meet the evolving needs of our customers.

We are committed to looking to the long-term as well. In addition to investing in new opportunities,

we have also taken steps to protect the resources we have and ensure the continued health of our facilities and equipment. In 2013, our capital expenditures totaled $60,470,000.

As a leader in industrial minerals innovation, our mission is to constantly push ourselves – and the industry – forward.

KEY AREAS OF FOCUS »» Develop new products and enter new markets »» Secure reserves for the long-term

$60.4M total capital expenditures in 2013

»» Invest in existing facilities

45

EXPANDING OUR NETWORK In order to best serve our customers, we have

increasingly looked to transload facilities as an integral part of our supply chain. In recent years and together with our customers, we have found efficiencies by

locating our product in close proximity to where it will be used.

Instead of shipping product from our plants directly to the customer, we offer delivery from a transload

facility, which offers additional storage and operational flexibility. These distribution centers have become an integral part of our business, allowing us to become

more efficient while adapting to the changing needs of

17

new transload facilities

our customers and expanding our reach.

In 2013, we increased our number of transload

sites to 35 with the addition of 17 new facilities.

These additions more than doubled the amount of sand passing through our transload facilities and

tremendously increased our ability to reach customers.

GROWTH THROUGH INNOVATION In 2013, we were focused on opportunities that allowed us to enter new markets and introduce ourselves to

2013 TARGET ACHIEVED Enter one new market based on product research and development.

new customers.

Resin-coated sand was our first foray into the

resin-coated foundry area. Instead of outsourcing the process to other industry experts, as we have in the past, today we do it ourselves. This added

treatment allows the product to be used for higher end

applications, opening us to a new market of customers. We congratulate our research and development team and its work over the past year, and are excited to

expand our customer base through new developments.

46

SECURING RESERVES FOR OUR FUTURE U.S. Silica is committed to ensuring a strong foundation for our customers and communities not only now but for the future. We do that by investing in existing operations, and by securing new sources of ore. Access to

new reserves ensures future production, which means we can continue to

support job growth, serve our customers, and partner with the surrounding communities. In 2013, we continued to make progress on the acquisition

and permitting of several new reserve projects. We worked closely with local officials to navigate the public permitting process, which typically spans

2013 TARGET ACHIEVED Increase permitted reserves for long-term sustainability.

several months or even years. Our aim is to operate strategically, partner with communities, and plan with the future in mind.

PROTECTING OUR FACILITIES Our facilities are the foundation of our business, and as a result, we strive Preventive Maintenance (TPM) program, a proactive approach to equipment

2013 TARGET ACHIEVED

WI facilities. By doing so, we met our goal of implementing TPM programs at

Develop and implement a Total

to take the best possible care of them. In 2013, we implemented a Total

maintenance that aims to reduce downtime, at our Columbia, SC and Sparta, 20% of our facilities, and we are looking forward to bringing the program to additional plants in 2014.

Preventative Maintenance program at 20% of U.S. Silica plants.

What is Centerlining? We use centerlining techniques, a process for determining an optimal operating state by making sure process input variables are set consistently on the equipment in our facilities. As a result, we are able to reduce variability in our production process, saving time and money.

47

CULTIVATING FUTURE LEADERS 2013 TARGET ACHIEVED Build leadership capability in line with succession and growth strategy.

Our employees are at the core of our business, and we pride ourselves on investing in their future. In order to foster growth and identify the

next generation of leadership, we recently implemented the Front Line

Leadership Program. In 2013, the 20 future leaders of our first class were nominated by their supervisors and peers to participate in a structured

program combining training and mentorship, all with the goal of preparing high potential employees for future leadership roles.

A GROWING TEAM

(TOTAL NUMBER OF EMPLOYEES) 2009 2010 2011 2012 2013

651 655 711 785 844

48

Industry Award Miner of the Year Congratulations to Laura Miko, plant manager at the Columbia, SC facility, for earning the Mining Association of South Carolina’s Miner of the Year Award. Laura has been with U.S. Silica for more than 16 years and is one of our strongest leaders and advocates for reclamation, conservation, and the community. As we look to the future and consider the legacy we leave behind, we are proud to call leaders like Laura part of our team, and we appreciate their innovative contributions to the industry. At U.S. Silica, it’s important that we support our employees and provide them with opportunities for rewarding careers.

49

CASE STUDY

SPARTA: SUSTAINABILITY FROM DAY ONE At our new facility in Sparta, WI, we have maintained the U.S. Silica commitment

to invest locally and ensure responsible operations. Through sustainable business practices, we successfully brought online a state-of-the-art plant while fostering

meaningful relationships in the Sparta community. Here are examples of how we did that:

BECOMING A GREEN TIER FACILITY U.S. Silica is a member of the Green Tier Program for exceptional environmental performance.

After setting a high bar in co-founding the Wisconsin Industrial Sand Association (WISA) with other industry leaders, we took the next step toward operational

excellence in 2013 by being accepted into the state’s Green Tier Program, which recognizes a facility as a superior environmental performer. The site boasts LED

and high efficiency lighting, mobile equipment designed to reduce noise pollution, a “closed loop” design that recycles water, and other green elements.

PARTNERING WITH THE COMMUNITY 2013 was a time of growing relationships with those who also call Sparta home. Building on our work to create a two-way dialogue with neighbors during the permitting process, that partnership continues today through our community

outreach committee, charitable giving, and ongoing efforts to partner with the local community.

INVESTING LOCALLY

97% of Sparta employees live within 30 miles

As a good neighbor, we recognize the importance of investing locally. In 2013

alone, our Sparta facility generated more than $7.8 million in local investments. We were thrilled to create 38 new jobs in Sparta in 2013, 97% of them filled by people living within 30 miles of the plant. Since the site’s opening, our employees have

given back to their neighbors by donating both time and money to local initiatives and organizations.

PROTECTING WILDLIFE Our Sparta plant shares its land with the wood turtle, a threatened species in need of protection. To prevent disturbing the turtles, we installed a protective fence and preserved their habitat.

PROACTIVE MAINTENANCE To keep our facility in top shape, we routinely inspect our Sparta plant using a

process called total preventive maintenance. Through detailed visual and audial

inspections of the work area and equipment, we can identify opportunities for repair prior to failure. This reduces the amount of time and cost we typically invest to restore damaged equipment in addition to enhancing the safety of our facility.

50

6

FUTURE

LOOKING AHEAD TO 2014 While we are proud of our accomplishments in 2013, we

know we have more work ahead. In 2014, we will continue building on this foundation by ensuring our employees’ safety, supporting our communities, and protecting our environment.

At our core, we are sustainable. We look forward to the

continued innovations and investments our team will make, as we build a legacy for which we can all be proud.

55

GOALS AND TARGETS FOR SUSTAINABILITY IN 2014

ENVIRONMENT 2017 BOLD GOAL

Minimize greenhouse gas emissions from U.S. Silica operations by reducing fuel and electricity usage at our plants.

2014 TARGET

Reduce dryer fuel usage by 5% at all facilities except Rochelle and Kosse. Perform energy evaluations at plants with large electricity demand in order to identify areas for potential reduction.

Conserve and preserve natural resources such as land, water, and energy.

Assess pumping management practices in Ottawa to minimize energy needed for pumping.

Reduce, reuse, or recycle 90% of all waste materials resulting from our operations.

Identify ways to expand waste recycling at all U.S. Silica plant locations.

Enhance quality of life and prosperity for our employees and communities where we operate.

Reduce water use at Sparta facility by enhancing water recycle loop.

Evaluate installation of waste compactors at U.S. Silica facilities.

Increase the percentage of local spend in the communities where we operate.

LEED Certification In 2014, our Chicago office will move into a LEED Gold Certified building. LEED buildings use less water and are more energy efficient, which means we will reduce our carbon footprint even further.

56

GOALS AND TARGETS FOR SUSTAINABILITY IN 2014

SAFETY AND COMMUNITY 2017 BOLD GOAL

2014 TARGET

Achieve zero reportable incidents and zero lost time incidents - no one will be injured.

Achieve zero lost time incidents.

Achieve 100% engagement in sustainability and corporate responsibility.

Implement Environmental Management Systems (EMS) at five U.S. Silica facilities.

Actively seek opportunities to volunteer/engage in community activities and triple annual donations to charities.

Achieve MSHA VPID (violations per inspection day) rate of 0.7. Achieve MSHA total reportable incident rate of 1.5.

Implement environmental training program for all Operations plant personnel.

Develop community outreach strategy for all facilities and offices. Implement scholarship programs in at least 10% of communities in which we operate (incl. regional offices).

LEGACY 2017 BOLD GOAL

2014 TARGET

Increase the number of sustainable product offerings and expand into new markets.

Enter one new market segment.

Integrate triple-bottom line thinking into our operations.

Include sustainability measures as part of capital project evaluation process.

57

7

APPENDIX

U.S. SILICA BY THE NUMBERS At U.S. Silica, we believe it’s important to hold ourselves accountable by examining our strengths and

opportunities for growth. These numbers give us the information necessary to build and invest in our future.

SAFETY AND COMMUNITY

2009 2010 2011 2012 2013

Total Number of Employees 651 655 711 785 844 Employee Participation in 401k Plan

87%

74%

77%

83%

85.5%

Tuition Payments $111K $103K $135K $218K $108K Average Service Years (Total Population)

15.72 16.21 14.87 13.00 12.16

Turnover Rate 9.3% 4.3% 5.2% 8.4% 11.1% Lost Time Incident Rate (per 200,000 work hours)

0.61

1.22

0.27

0.12

0.3

Total Reportable Incident Rate (per 200,000 work hours)

1.98

3.67

2.17

1.98

1.81

Charitable Contributions

$107K $161K $122K $309K $196K

ENVIRONMENT 2009 2010 2011 2012 2013 Greenhouse Gas (GHG) Emissions (CO2e metric tons)

210K

244K

248K

268K

301K

GHG Emissions (lbs. per ton of product sold)

91.6

90.3

86.9

83.8

81.0

Purchased Natural Gas (MMBTU/dried ton)

0.26

0.28

0.26

0.25

0.24

Purchased Fuel and Propane (gallons/sales ton)

0.27

0.24

0.20

0.21

0.17

Purchased Electricity (kWh/sales ton)

31.86 32.28 32.44 30.84 27.62

LEGACY

2009 2010 2011 2012 2013

Net Sales $192M $245M $296M $442M $546M Capital Expenditures $13M $15M $67M $106M $60M

60 | APPENDIX

GRI MATERIALITY ANALYSIS As part of the research and development for At Our Core, U.S. Silica’s 2013 Sustainability Report, we

conducted a materiality analysis in order to fully examine what sustainability areas and impacts are most critical to our stakeholders as well as our near and long-term business operations.

Our analysis began with a survey of internal stakeholders and subject matter experts to understand the

most critical concerns for our current and future operations. We also engaged with external stakeholders,

including community leaders, to understand which aspects of U.S. Silica’s sustainability efforts are of most interest to them.

While almost every aspect of our business function is relevant from a sustainability perspective, the

analysis showed several topics to be more material for this report because of their level of potential impact to the company, the interest level of our stakeholders, or both. These topics are as follows: »» Economic (Economic Performance) »» Environment (Energy, Emissions, Effluents and Waste) »» Labor Practices and Decent Work (Occupational Health and Safety, Training and Education) »» Society (Local Communities) The materiality analysis is intended only as a guide to select the report’s content. From product safety to procurement practices, and from economic impact to environmental responsibility, U.S. Silica considers each facet of its business and operations to be critical. The concept of materiality is used here only to allow us to focus more fully on key areas so that these topics can be discussed in depth.

GRI INDEX* GENERAL STANDARD DISCLOSURES General Standard

Location of Disclosure

STRATEGY AND ANALYSIS G4-1

Pg. 2 (A Message from Our CEO)

G4-2

Pg. 2 (A Message from Our CEO), pg. 14-15 (Goals and Targets for Sustainability in 2013) and U.S. Silica 2013 Form 10-K (pages 4-5 and 22-43)

*Not externally assured

APPENDIX | 61

ORGANIZATIONAL PROFILE G4-3

U.S. Silica Holding Company, Inc.

G4-4

Pg. 10 (Everyday Uses)

G4-5

Our corporate headquarters is located in Frederick, Maryland.

G4-6

The operations specifically relevant to the sustainability topics covered in this report take place in the United States. U.S. Silica also has limited operations in two other countries.

G4-7

U.S. Silica is a Delaware corporation.

G4-8

U.S. Silica 2013 Form 10-K (pages 8, 9 and 12)

G4-9

Pg. 60 (U.S. Silica by the Numbers) and U.S. Silica 2013 Form 10-K (pages 16, 83 and 84)

G4-10

U.S. Silica Form 10-K (pages 16 and 65)

G4-11

U.S. Silica Form 10-K (page 65)

G4-12

U.S. Silica maintains a diverse supply chain with suppliers that provide material goods used in sand production (machinery, parts and other materials) and services in support of sand production operations.

G4-13

Pg. 46 (Expanding Our Network) and U.S. Silica 2013 Form 10-K (page 88)

G4-14

U.S. Silica addresses the precautionary principle by utilizing an approach combining adherence to, and compliance with, existing environmental regulations, continuous environmental improvement, and incorporating sustainability into business operations.

G4-15

Not applicable.

G4-16

Pg. 12 (Associations and Memberships)

IDENTIFIED MATERIAL ASPECTS AND BOUNDARIES G4-17

U.S. Silica Form 10-K (Exhibit 21.1)

G4-18

Pg. 61 (Materiality Analysis)

G4-19

Pg. 61 (Materiality Analysis)

G4-20

Specific limitation on aspect boundary within the organization: Corporate offices in Frederick, MD, Chicago, IL, Houston, TX and Shanghai are not included in emissions calculations.

G4-21

All aspects considered material for purposes of this report are considered material outside the organization. The aspect boundary varies by topic; economic factors are considered to have a potential international effect, while environmental factors are considered to affect only potential receptors of potential environmental impact.

G4-22

Not applicable; no information contained in the 2012 Sustainability Report has required restatement.

G4-23

External aspect boundaries may have changed since previous reporting periods due to changing markets and customer base, as well as communities into which U.S. Silica may have expanded operations.

62 | APPENDIX

STAKEHOLDER ENGAGEMENT G4-24

G4-25

Pg. 12 (Associations and Memberships) and pg. 38-41 (Building Strong Communities) U.S. Silica pursues a policy of active engagement with each municipality in which it operates. Additional stakeholders requiring engagement are identified on an as-needed basis, and include (but are not limited to) applicable regulators, community groups, non-governmental agencies, oproperty owners and homeowners proximate to U.S. Silica operations.

G4-26

Frequency of engagement of external stakeholder groups varies by location and/or business group. The U.S. Silica Sustainability Council was engaged specifically to pursue sustainability goals relevant to the business as presented within this report.

G4-27

Pg. 38-41 (Building Strong Communities)

REPORT PROFILE G4-28

The reporting period covered in the 2013 Sustainability Report is January 1 through December 31, 2013.

G4-29

The most recent previous Sustainability Report is dated August 2, 2013.

G4-30

Annual

G4-31

David Clauson, Senior Manager, Environmental Programs, 312-589-7554

G4-32

U.S. Silica has elected to report using the “in accordance” Core option. GRI Content Index is located in the Appendix to this Report. Report has not been externally assured.

G4-33

Report has not been externally assured.

GOVERNANCE

G4-34

U.S. Silica’s Board of Directors is responsible for oversight of the company. The Board has established the following committees to assist with this oversight function: Audit; Executive; Compensation and Governance Pg. 11 (Corporate Management and Governance) and U.S. Silica 2014 Proxy Statement (pg. 9-11)

ETHICS AND INTEGRITY G4-56

Pg. 2 (A Message from Our CEO)

APPENDIX | 63

SPECIFIC STANDARD DISCLOSURES** DMA and Indicators

Location of Disclosure

CATEGORY: ECONOMIC MATERIAL ASPECT: ECONOMIC PERFORMANCE G4-DMA

U.S. Silica operates in an ethical manner intended to comply with the economic regulations of the areas in which it operates.

G4-EC1

Pg. 60 (U.S. Silica by the Numbers) and U.S. Silica 2013 Form 10-K (pages 83 and 84)

CATEGORY: ENVIRONMENTAL MATERIAL ASPECT: ENERGY G4-DMA

Due to the need to utilize natural resources during business functioning, as necessary U.S. Silica evaluates its use of electricity, natural gas and other fuels and in general works to increase the efficiency of the use of those resources.

G4-EN5

Pg. 60 (U.S. Silica by the Numbers)

G4-EN6

Pg. 60 (U.S. Silica by the Numbers)

MATERIAL ASPECT: EMISSIONS G4-DMA

U.S. Silica operates its facilities in a manner intended to comply with federal, state and local laws governing environmental emissions. Many U.S. Silica facilities operate under state-granted air permits which govern allowable emissions from operations.

G4-EN15

Pg. 60 (U.S. Silica by the Numbers)

G4-EN16

Pg. 60 (U.S. Silica by the Numbers)

G4-EN18

Pg. 60 (U.S. Silica by the Numbers)

MATERIAL ASPECT: EFFLUENTS AND WASTE

G4-DMA

U.S. Silica operates its facilities in a manner intended to comply with federal, state and local laws governing effluents and waste. Many U.S. Silica facilities operate under state-granted water permits which govern allowable effluent discharge from operations. U.S. Silica seeks to divert waste from landfills for beneficial reuse where practicable.

G4-EN23

Pg. 24 (Case Study: Waste Stream Reduction)

**No identified omissions

64 | APPENDIX

CATEGORY: SOCIAL SUB-CATEGORY: LABOR PRACTICES AND DECENT WORK MATERIAL ASPECT: OCCUPATIONAL HEALTH AND SAFETY G4-DMA

U.S. Silica operates in a manner intended to comply with the various health and safety regulations of the areas in which it operates.

G4-LA6

Pg. 60 (U.S. Silica by the Numbers)

G4-LA10

Pg. 48 (Cultivating Future Leaders) and Pg. 60 (U.S. Silica By the Numbers)

SUB-CATEGORY: HUMAN RIGHTS MATERIAL ASPECT: CHILD LABOR G4-DMA

U.S. Silica operates in a manner intended to comply with the various human rights regulations of the areas in which it operates.

G4-HRS

No U.S. Silica operations were identified as having potential significant risk for incidents of child labor.

SUB-CATEGORY: SOCIETY MATERIAL ASPECT: LOCAL COMMUNITIES G4-DMA G4-SO1

U.S. Silica operates in a manner intended to benefit the local community not only through economic means such as taxes, local hiring and procurement, but also through volunteerism and donation to organizations in need. All U.S. Silica offices and facilities have programs in place to address community engagement.



SUB-CATEGORY: PRODUCT RESPONSIBILITY MATERIAL ASPECT: PRODUCT AND SERVICE LABELING G4-DMA

U.S. Silica operates in a manner intended to comply with the various product responsibility regulations of the areas in which it operates.

G4-PR2

No incidents of non-compliance with regulations governing product health and safety impacts uccurred during the reporting period.

APPENDIX | 65

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