Document:

EX-10.1

 Exhibit 10.1 

EXECUTION VERSION 

STOCK PURCHASE AGREEMENT 

THIS STOCK PURCHASE AGREEMENT (this “Agreement”), is made as of August 6, 2021, by and among Charah Solutions, Inc., a
Delaware corporation (the “Company”), and the investor listed on Exhibit A attached to this Agreement (the “Purchaser”). 

The parties hereby agree as follows: 

1. Purchase and Sale of Common Stock. 

1.1 Sale and Issuance of Common Stock. Subject to the terms and conditions of this Agreement, the Purchaser agrees to purchase at the
Closing (as defined below), and the Company agrees to sell and issue to the Purchaser at the Closing, that number of shares of common stock, $0.01 par value per share (the “Common Stock”), set forth opposite the Purchaser’s
name on Exhibit A, at a purchase price of $4.50 per share. The shares of Common Stock issued to the Purchaser pursuant to this Agreement shall be referred to in this Agreement as the “Shares.” 

1.2 Closing; Delivery. 

(a) The purchase and sale of the Shares shall take place remotely via the exchange of documents and signatures, on August 6, 2021,
or at such other time and place as the Company and the Purchaser mutually agrees upon, orally or in writing (which time and place are designated as the “Closing”). 

(b) At or promptly after the Closing, the Company shall deliver to the Purchaser a certificate representing the Shares, or evidence of the
book-entry issuance of the Shares, being purchased by the Purchaser at the Closing against payment of the purchase price as set forth on Exhibit A (the “Purchase Price”) therefor by wire transfer to a bank
account designated by the Company. 
 1.3 Defined Terms Used in this Agreement. In addition to the terms defined above, the following
terms used in this Agreement shall be construed to have the meanings set forth or referenced below. 
 (a) “Affiliate”
means, with respect to any specified Person, any other Person who, directly or indirectly, controls, is controlled by, or is under common control with such Person, including, without limitation, any general partner, managing member, officer,
director or trustee of such Person, or any venture capital fund or registered investment company now or hereafter existing that is controlled by one or more general partners, managing members or investment advisers of, or shares the same management
company or investment adviser with, such Person. 
 (b) “Backstop Agreement” means the Engagement and Backstop Commitment
Letter, dated as of July 31, 2021, by and between Charah Solutions, Inc. and B. Riley Securities, Inc., relating to the Transaction. 

(c) “Code” means the Internal Revenue Code of 1986, as amended. 

  
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 (d) “Company Credit Agreement” means the Credit Agreement, dated as of
September 21, 2018, by and among Charah Solutions, Inc., certain of the Charah Solutions, Inc.’s subsidiaries, as guarantors, Bank of America, N.A., as administrative agent, swingline lender and letter of credit issuer, and the other
lenders party thereto, as subsequently amended. 
 (e) “Company SEC Filings” mean (i) the Company’s forms,
registration statements, reports, schedules and statements filed or furnished by it under the Exchange Act or the Securities Act with the SEC since January 1, 2020, and (ii) the draft, dated as of August 6, 2021, of the
Company’s Form 10-Q for the quarter ended June 30, 2021 that was provided to the Purchaser. 

(f) “DGCL” means the Delaware General Corporation Law, as amended or superseded from time to time. 

(g) “Environmental Laws” shall have the meaning ascribed to such term in Section 2.15. 

(h) “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated
thereunder. 
 (i) “FCPA” means the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations
thereunder. 
 (j) “GAAP” means United States generally accepted accounting principles. 

(k) “Investor Rights Agreement” means that certain agreement, to be dated as of the Closing, by and between the Company,
B. Riley Financial, Inc., a Delaware corporation, and the Purchaser. 
 (l) “Intellectual Property Rights” shall have
the meaning ascribed to such term in Section 2.16. 
 (m) “Material Adverse Effect” shall have
the meaning ascribed to such term in Section 2.1. 
 (n) “Money Laundering Laws” shall have the
meaning ascribed to such term in Section 2.20. 
 (o) “NYSE” means the New York Stock Exchange.

 (p) “OFAC” means the Office of Foreign Assets Control of the U.S. Treasury Department. 

(q) “Person” means any individual, corporation, partnership, trust, limited liability company, association or other entity.

  
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 (r) “SEC” means the United States Securities and Exchange Commission. 

(s) “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 

(t) “Subsidiary” means any significant subsidiary of the Company as defined in Rule 405 under the Securities Act. 

(u) “Transaction” means the Company’s firm commitment underwritten public offering of “baby bond” debt
securities, with B. Riley as lead left underwriter and sole bookrunner, resulting in aggregate gross proceeds to the Company of at least $135 million, inclusive of a $15 million commitment from Bernhard Capital Partners Management, LP
or an affiliate thereof, as more fully described in the Backstop Agreement. 
 2. Representations and Warranties of the Company. The
Company hereby represents and warrants to the Purchaser that the following representations are true and correct as of the date of the Closing, except as otherwise indicated. 

2.1 Organization, Good Standing and Qualification. Each of the Company and its Subsidiaries has been duly organized and is validly
existing as a corporation or other legal entity as applicable in good standing (or its equivalent) under the laws of its jurisdiction of incorporation or organization. Each of the Company and its Subsidiaries is duly qualified to do business and is
in good standing as a foreign corporation or other legal entity in each jurisdiction in which its ownership or lease of its properties or the conduct of its business requires such qualification and has all corporate power and authority necessary to
own or hold its properties and to conduct the businesses in which each is engaged as described in the Company SEC Filings except where the failure to so qualify or have such power or authority would not reasonably be expected to (i) have,
singularly or in the aggregate, a material adverse effect on the condition (financial or otherwise), results of operations, assets, or business of the Company and its Subsidiaries, taken as a whole, or (ii) impair in any material respect the
ability of the Company to perform its obligations under this Agreement or to consummate any transactions contemplated by this Agreement (any such effect as described in clauses (i) or (ii), a “Material Adverse Effect”). 

2.2 Authorization, Enforceable Agreement. The Company has the full legal right, power and authority to execute and deliver, and perform
its obligations under this Agreement. This Agreement has been duly authorized, executed and delivered by the Company, and when executed and delivered, assuming due authorization, execution and delivery by the Purchaser, constitutes and will
constitute valid and legally binding obligations of the Company, enforceable in accordance with their respective terms, subject to applicable bankruptcy, insolvency, moratorium, reorganization, fraudulent conveyance or similar laws affecting the
enforcement of creditors’ rights generally and to general equitable principles (whether considered in a proceeding in equity or at Law). 

2.3 Valid Issuance of Shares. The Shares have been duly authorized by the Company, and when the Shares are issued and delivered in
accordance with the terms of this Agreement against payment of the consideration set forth herein, the Shares will be validly issued and outstanding, fully paid and non-assessable, not subject to any
preemptive or other similar rights, except as specified in the Investor Rights Agreement, and will entitle the holders of the Shares to the rights and benefits provided therein. 

  
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 2.4 Valid Issuance of Capital Stock. All issued and outstanding shares of capital
stock of the Company outstanding prior to the issuance of the Shares are validly issued, fully paid and non-assessable and were issued in compliance in all material respects with United States federal and
applicable state securities laws. All of the Company’s options, warrants and other rights to purchase or exchange any securities for shares of the Company’s capital stock have been duly authorized and validly issued and were issued in
compliance in all material respects with United States federal and applicable state securities laws. None of the outstanding shares of capital stock was issued in violation of any preemptive rights, rights of first refusal or other similar rights to
subscribe for or purchase securities of the Company. 
 2.5 Capitalization. Other than pledges of the interest of the Subsidiaries
pursuant to the Company Credit Agreement, the membership interests, capital stock, partnership interests or other similar equity interests, as applicable, of each Subsidiary, have been duly authorized and validly issued, are fully paid and
nonassessable and, except to the extent set forth in the Company SEC Filings or would not individually or in the aggregate, be reasonably expected to have a Material Adverse Effect, are owned by the Company directly, free and clear of any claim,
lien, encumbrance, security interest, restriction upon voting or transfer or any other claim of any third party. The respective rights, preferences, privileges, and restrictions of the Company’s capital stock are as stated in the Company’s
Amended and Restated Certificate of Incorporation and Certificate of Designations and the Company SEC Filings.
 2.6 Absence of Breach or
Violation. None of (1) the execution, delivery and performance of this Agreement by the Company and (2) the issuance and sale of the Shares by the Company (with or without notice or lapse of time or both) (x) conflicts with or
results in a breach or violation of any of the terms or provisions of, constitutes a default under, gives rise to any right of termination or other right or the cancellation or acceleration of any right or obligation or loss of a benefit under or
pursuant to, any mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its Subsidiaries is a party or by which the Company or any of its Subsidiaries is bound or to which any of the property or
assets of the Company or any of its Subsidiaries is subject, (y) results in any violation of the provisions of the certificate of incorporation or bylaws (or analogous governing instruments, as applicable) of the Company or any of its
Subsidiaries, or (z) results in any violation of provisions of any law, statute, rule, regulation, judgment, order or decree of any court or governmental agency or body, domestic or foreign, having jurisdiction over the Company or any of its
Subsidiaries or any of their properties or assets; except, with respect to clauses (x) or (z), any contravention which would not reasonably be expected to have a Material Adverse Effect. 

2.7 Consents and Approvals. No consent, approval, authorization or order of, qualification with, or filing with any governmental body or
agency or self-regulatory authority is required for the performance by the Company of its obligations under this Agreement, except (1) the filing with the SEC of such reports under the Exchange Act as may be required in connection with this
Agreement and the transactions contemplated thereby, (2) as have been obtained or as may be required by the securities or blue sky laws of the various states or (3) as 

  
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required under the rules and regulations of the NYSE. Assuming that the representations of the Purchaser set forth in Section 3 are true and correct, the offer, sale,
and issuance of the Shares in conformity with the terms of this Agreement will be, exempt from the registration requirements of Section 5 of the Securities Act, and all applicable state securities laws, and neither the Company nor any
authorized agent acting on its behalf will take any action hereafter that would cause the loss of such exemptions. 
 2.8 Independent
Registered Public Accounting Firm. Deloitte & Touche LLP, who has audited certain financial statements of the Company, is, to the knowledge of the Company, an independent registered public accounting firm as required by the Securities
Act and the Rules and Regulations and the Public Company Accounting Oversight Board (United States). 
 2.9 Financial Statements. The
Company’s financial statements, together with the related notes and schedules thereto, fairly present, in all material respects, the financial position and the results of operations and changes in financial position of the Company and its
consolidated Subsidiaries and other consolidated entities at the respective dates or for the respective periods therein specified. Such statements and related notes and schedules have been prepared in accordance with GAAP, applied on a consistent
basis throughout the periods involved except as may be set forth in the related notes. The financial statements, together with the related notes and schedules, comply as to form in all material respects with Regulation
S-X under the Exchange Act. 
 2.10 Liabilities. The Company and its Subsidiaries, on a
consolidated basis, do not have any material liabilities or obligations, direct or contingent (including any off-balance sheet obligations or any “variable interest entities” within the meaning of
the Financial Accounting Standards Board’s Accounting Standards Codification Topic 810), which are not disclosed in the Company SEC Filings. 

2.11 Absence of Changes; Material Adverse Effect. Since the date of the most recent financial statements of the Company included or
incorporated by reference in the Company SEC Filings, there has not occurred any event or circumstance that has had or would reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. 

2.12 Litigation; Proceedings. Except as set forth in the Company SEC Filings, there are no legal or governmental proceedings pending to
which the Company or any of its Subsidiaries is a party or to which any property or asset of any of the Company or any of its Subsidiaries is subject that would reasonably be expected to have, individually or in the aggregate, a Material Adverse
Effect or which challenges the validity of any of this Agreement or the right of the Company to enter into this Agreement or to consummate the transactions contemplated hereby. 

2.13 Real and Personal Property. Each of the Company and its Subsidiaries has good and valid title to all real property and good title
to all personal property described in the Company SEC Filings as owned by such entity, free and clear of all liens except (a) as are described in the Company SEC Filings, (b) as are created, arise under or secure the Company Credit
Agreement, or (c) as would not, in the aggregate, reasonably be expected to have a Material Adverse Effect. 

  
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 2.14 Compliance with Environmental Laws. Except as disclosed in the Company SEC
Filings, neither the Company nor any of its Subsidiaries is in violation of any statute, rule, regulation, decision or order of any governmental agency or body or any court, relating to the use, disposal or release of hazardous or toxic substances
or relating to the protection or restoration of the environment or human exposure to hazardous or toxic substances (collectively, “Environmental Laws”), operates any real property contaminated with any substance that is subject to
any Environmental Laws, is liable for any off-site disposal or contamination pursuant to any Environmental Laws, or is subject to any claim relating to any Environmental Laws, which violation, contamination,
liability or claim would individually or in the aggregate reasonably be expected to have a Material Adverse Effect; and the Company is not aware of any pending investigation that the Company expects will lead to such a claim. 

2.15 Intellectual Property. Except as described in the Company SEC Filings, to the Company’s knowledge with respect to patents and
patent applications only, the Company and its Subsidiaries own or possess, or have the right to use or can acquire on reasonable terms, adequate trademarks, trade names and other rights to inventions,
know-how, patents, copyrights, confidential information and other intellectual property (collectively, “Intellectual Property Rights”) necessary to conduct the business now operated by them,
or presently employed by them, and have not received any notice of infringement of or conflict with asserted rights of others against the Company with respect to any Intellectual Property Rights, except such as will not individually or in the
aggregate reasonably be expected to have a Material Adverse Effect. 
 2.16 Internal Controls. Except as disclosed in the Company SEC
Filings, the Company maintains a system of internal accounting controls sufficient to provide reasonable assurance that: (i) transactions are executed in accordance with management’s general or specific authorizations;
(ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general
or specific authorization; and (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences. 

2.17 Absence of Certain Relationships. No relationship, direct or indirect, exists between or among the Company or any of its
Subsidiaries, on the one hand, and the directors, officers, stockholders (or analogous interest holders), customers or suppliers of the Company or any of its Subsidiaries or any of their controlled affiliates, on the other hand, which is required to
be described under Item 404(a) of Regulation S-K in the Company SEC Filings and which is not so described. 

2.18 FCPA. Neither the Company nor any of its Subsidiaries, nor, to the knowledge of the Company and its Subsidiaries, any of its
directors, officers, agents, employees, controlled affiliates or other person acting on their behalf is aware of or has taken any action, directly or indirectly, that has violated or would result in a violation by such persons of the FCPA,
including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift,
promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in
contravention of the FCPA. The Company and its Subsidiaries have instituted and maintain policies and procedures designed to reasonably ensure, and which are reasonably expected to continue to ensure, continued compliance therewith. 

  
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 2.19 Compliance with Money Laundering Laws. The operations of the Company and its
Subsidiaries are and have been conducted at all times, in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all
applicable jurisdictions, the rules and regulations thereunder and any related or similar applicable rules, regulations or guidelines, issued, administered or enforced by any governmental agency having jurisdiction over the Company (collectively,
the “Money Laundering Laws”) except where the failure to be in such compliance would not reasonably be expected to result in a Material Adverse Effect; and no action, suit or proceeding by or before any court or governmental agency,
authority or body or any arbitrator involving the Company or any of its Subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company, threatened. 

2.20 OFAC. Neither the Company nor any of its Subsidiaries is currently subject to any U.S. sanctions administered by OFAC; and the
Company will not directly or indirectly use the proceeds from the transactions contemplated by this Agreement, or lend, contribute or otherwise make available such proceeds to any Subsidiary, joint venture partner or other person or entity, for the
purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC. 
 2.21 Registration
Rights. Except as described in the Company SEC Filings and as provided in the Investor Rights Agreement, the Company has not granted or agreed to grant, and is not under any obligation to provide, any rights to register under the Securities Act
any of its presently outstanding securities or any of its securities that may be issued subsequently. 
 2.22 Compliance with
Sarbanes-Oxley Act of 2002. The Company is in compliance in all material respects with all applicable provisions of the Sarbanes-Oxley Act of 2002 and all applicable rules and regulations promulgated thereunder or is implementing the provisions
thereof that are currently in effect. 
 2.23 Permits. Except as otherwise disclosed in the Company SEC Filings, each of the Company
and its Subsidiaries possess such valid and current certificates, authorizations or permits issued by the appropriate state, federal or foreign regulatory agencies or bodies necessary to conduct their respective businesses as described in the
Company SEC Filings, except where the failure to do so would not reasonably be expected to have a Material Adverse Effect, and neither the Company nor any Subsidiary of the Company has received any notice of proceedings relating to the revocation or
modification of, or non-compliance with, any such certificate, authorization or permit which, individually or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would reasonably be
expected to result in a Material Adverse Effect. 
 2.24 Tax Returns. Each of the Company and its Subsidiaries have filed all material
federal, state and foreign income and franchise tax returns or have properly requested extensions thereof and have paid all material taxes required to be paid by any of them and, if due and payable, any related or similar assessment, fine or penalty
levied against any of them except as may be being contested in good faith and by appropriate proceedings, except where the failure to do so would not reasonably be expected to have a Material Adverse Effect. 

  
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 2.25 NYSE. No approval of the stockholders of the Company under the rules and
regulations of the NYSE is required for the Company to issue and deliver the Shares. 
 2.26 Insurance. Except as otherwise disclosed
in the Company SEC Filings, the Company maintains or is entitled to the benefits of insurance from reputable insurers covering its properties, operations, personnel and businesses against such losses and risks as are reasonably adequate to protect
it and its businesses in a commercially reasonable manner. All such insurance is outstanding and duly in force on the date hereof, except for such insurance for which the failure to be outstanding and duly in force would not reasonably be expected
to have a Material Adverse Effect. 
 2.27 Use of Proceeds. The proceeds from the sale of Shares to the Purchaser shall be used for
the repayment of indebtedness and general corporate purposes. 
 3. Representations and Warranties of the Purchaser. The Purchaser
hereby represents and warrants to the Company that: 
 3.1 Existence; Authorization; No Breach. The Purchaser is duly organized
and validly existing and in good standing under the laws of its state of formation, with all necessary power and authority to own properties and to conduct its business as currently conducted. The Purchaser has full power and authority to enter into
this Agreement. This Agreement, when executed and delivered by the Purchaser, will constitute valid and legally binding obligations of the Purchaser, enforceable against the Purchaser in accordance with its terms, except as limited by applicable
bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance and any other laws of general application affecting enforcement of creditors’ rights generally, and as limited by laws relating to the availability of specific
performance, injunctive relief or other equitable remedies. The execution, delivery and performance of the Agreement by the Purchaser and the consummation by the Purchaser of the transactions contemplated herein will not (a) conflict with or
result in a breach or violation of any of the terms or provisions of, or constitute a default under, any agreement to which the Purchaser is a party or by which the Purchaser is bound or to which any of the property or assets of the Purchaser is
subject, (b) conflict with or result in any violation of the provisions of the organizational documents of the Purchaser, or (c) violate any statute, order, rule or regulation of any court or governmental agency or body having jurisdiction
over the Purchaser or the property or assets of the Purchaser, except in the case of clauses (a) and (c), for such conflicts, breaches, violations or defaults would not prevent the consummation of the transactions contemplated by this
Agreement. 
 3.2 Purchase Entirely for Own Account. This Agreement is made with the Purchaser in reliance upon the Purchaser’s
representation to the Company, which, by the Purchaser’s execution of this Agreement, the Purchaser hereby confirms that the Shares to be acquired by the Purchaser will be acquired for investment for the Purchaser’s own account, not as a
nominee or agent, and not with a view to the resale or distribution of any part thereof, and that the Purchaser has no present intention of selling, granting any participation in, or otherwise distributing the same. By executing this Agreement, the
Purchaser further represents that the Purchaser does not presently have any contract, undertaking, agreement or arrangement with any Person to sell, transfer or grant participations to such Person or to any third Person, with respect to any of the
Shares. The Purchaser has not been formed for the specific purpose of acquiring the Shares. 

  
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 3.3 Disclosure of Information. The Purchaser has had an opportunity to discuss the
Company’s business, management, financial affairs and the terms and conditions of the offering of the Shares with the Company’s management and has had access to the Company SEC Filings and to certain financial and other information to
inform its decision to purchase the Shares. The Purchaser understands that its purchase of the Shares involves a high degree of risk. The Purchaser is a sophisticated investor and knows that the Company may have material non-public information concerning the Company and its condition (financial and otherwise), results of operations, businesses, properties, plans and prospects and that such information could be material to the
Purchaser’s decision to purchase the Shares or otherwise materially adverse to the Purchaser’s interests. The Purchaser is not relying on the disclosure or omission of any such information. The Purchaser acknowledges and agrees that the
Company shall have no obligation to disclose to it any such information and hereby waives and releases, to the fullest extent permitted by applicable law, any and all claims and causes of action it has or may have against the Company and its
affiliates, officers, partners, directors, employees, agents and representatives based upon, relating to or arising out of nondisclosure of such information or the purchase of the Shares hereunder. The Purchaser has adequate information concerning
the business and financial condition of the Company to make an informed decision regarding the purchase of the Shares and has, independently and without reliance upon the Company, made its own analysis and decision to purchase the Shares. With
respect to legal, tax, accounting, financial and other considerations involved in the transactions contemplated by this Agreement, including the purchase of the Shares, the Purchaser is not relying on the Company (or any agent or representative
thereof). The Purchaser has carefully considered and, to the extent it believes such discussion is necessary, discussed with professional legal, tax, accounting, financial and other advisors the suitability of the transactions contemplated by this
Agreement, including the purchase of the Shares. The Purchaser acknowledges that it has not relied upon any express or implied representations or warranties of any nature made by or on behalf of the Company, whether or not any such representations,
warranties or statements were made in writing or orally, except as expressly set forth for the benefit of the Purchaser in this Agreement. The foregoing, however, does not limit or modify the representations and warranties of the Company in
Section 2 of this Agreement or the right of the Purchaser to rely thereon. 
 3.4 Restricted Securities. The
Purchaser understands that the Shares have not been, and will not be, registered under the Securities Act, by reason of a specific exemption from the registration provisions of the Securities Act which depends upon, among other things, the bona fide
nature of the investment intent and the accuracy of the Purchaser’s representations as expressed herein. The Purchaser understands that the Shares are “restricted securities” under applicable U.S. federal and state securities laws and
that, pursuant to these laws, the Purchaser must hold the Shares indefinitely unless they are registered with the SEC and qualified by state authorities, or an exemption from such registration and qualification requirements is available. The
Purchaser acknowledges that the Company has no obligation to register or qualify the Shares for resale, except as set forth in the Investor Rights Agreement. The Purchaser further acknowledges that if an exemption from registration or qualification
is available, it may be conditioned on various 

  
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requirements including, but not limited to, the time and manner of sale, the holding period for the Shares, and on requirements relating to the Company which are outside of the Purchaser’s
control, and which the Company is under no obligation and may not be able to satisfy. The Purchaser represents that it is familiar with SEC Rule 144, as presently in effect, and understands the resale limitations imposed thereby and by the
Securities Act. 
 3.5 RESERVED. 

3.6 Legends. The Purchaser understands that the Shares and any securities issued in respect of or exchange for the Shares, may be
notated with one or all of the following legends: 
 (a) “THE SHARES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933 AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH TRANSFER MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL
IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT OF 1933.” and 
 (b) Any legend
required by the securities laws of any state to the extent such laws are applicable to the Shares represented by the certificate, instrument, or book entry so legended. 

3.7 Accredited Investor. The Purchaser is an accredited investor as defined in Rule 501(a) of Regulation D promulgated under the
Securities Act and is able to bear the risk of its investment in the Shares. The Purchaser acknowledges that it is able to fend for itself, can bear the economic risk of its investment and has such knowledge and experience in financial and business
matters that it is capable of evaluating the merits and risks of the purchase of the Shares. 
 3.8 No General Solicitation. Neither
the Purchaser, nor any of its officers, directors, employees, agents, stockholders or partners has either directly or indirectly, including, through a broker or finder (a) engaged in any general solicitation, or (b) published any
advertisement in connection with the offer and sale of the Shares. 
 3.9 Residence. The office or offices of the Purchaser in which
its principal place of business is identified in the address or addresses of the Purchaser set forth on Exhibit A. 

4. Conditions to The Purchaser’s Obligations at Closing. The obligations of the Purchaser to
purchase Shares at the Closing are subject to the fulfillment, on or before the Closing, of each of the following conditions, unless otherwise waived: 

4.1 Representations and Warranties. The representations and warranties of the Company contained in
Section 2 shall be true and correct in all respects as of the Closing, except for any inaccuracies that could not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. 

  
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 4.2 Performance. The Company shall have performed and complied with all covenants,
agreements, obligations and conditions in all material respects contained in this Agreement that are required to be performed or complied with by the Company on or before the Closing. 

4.3 Compliance Certificate. The President of the Company shall deliver to the Purchaser at the Closing a certificate certifying that the
conditions specified in Sections 4.1 and 4.2 have been fulfilled. 
 4.4 Qualifications. All
authorizations, approvals or permits, if any, of any governmental authority or regulatory body of the United States or of any state that are required in connection with the lawful issuance and sale of the Shares pursuant to this Agreement shall be
obtained and effective as of the Closing. No Law, injunction, judgment or ruling enacted, promulgated, issued, entered, amended or enforced by any governmental authority shall be in effect enjoining, restraining, preventing or prohibiting
consummation of the transactions contemplated by this Agreement. 
 4.5 Investor Rights Agreement. The Company shall have executed and
delivered the Investor Rights Agreement to the Purchaser. 
 4.6 Secretary’s Certificate. The Secretary of the
Company shall have delivered to the Purchaser at the Closing a certificate in the form and substance satisfactory to the Purchaser. 
 4.7
Legal Opinion. The Purchaser shall have received the opinion of Vinson & Elkins LLP, counsel to the Company in form and substance satisfactory to the Purchaser. 

4.8 Proceedings and Documents. All corporate and other proceedings in connection with the transactions contemplated at the Closing and
all documents incident thereto shall be reasonably satisfactory in form and substance to the Purchaser, and the Purchaser (or its counsel) shall have received all such counterpart original and certified or other copies of such documents as
reasonably requested. Such documents may include good standing certificates. 
 4.9 Cross Receipt. The Company shall have delivered to
the Purchaser a cross-receipt executed by the Company certifying that it has received from the Purchaser an amount in cash equal to the Purchase Price. 

4.10 Backstop Agreement. The Company shall have executed and delivered the Backstop Agreement to B. Riley Securities, Inc., an
affiliate of the Purchaser. 
 5. Conditions of the Company’s Obligations at Closing. The obligations of the
Company to sell Shares to the Purchaser at the Closing are subject to the fulfillment, on or before the Closing, of each of the following conditions, unless otherwise waived: 

5.1 Representations and Warranties. The representations and warranties of the Purchaser contained in Section 3
shall be true and correct in all respects as of the Closing. 

  
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 5.2 Performance. The Purchaser shall have performed and complied with all covenants,
agreements, obligations and conditions contained in this Agreement that are required to be performed or complied with by them on or before the Closing. 

5.3 Compliance Certificate. An authorized officer of the Purchaser shall deliver to the Company at the Closing a certificate certifying
that the conditions specified in Sections 5.1 and 5.2 have been fulfilled. 
 5.4 Qualifications. All
authorizations, approvals or permits, if any, of any governmental authority or regulatory body of the United States or of any state that are required in connection with the lawful issuance and sale of the Shares pursuant to this Agreement shall be
obtained and effective as of the Closing. No Law, injunction, judgment or ruling enacted, promulgated, issued, entered, amended or enforced by any governmental authority shall be in effect enjoining, restraining, preventing or prohibiting
consummation of the transactions contemplated by this Agreement. 
 5.5 Investor Rights Agreement. The Purchaser and B. Riley
Financial, Inc. shall have executed and delivered the Investor Rights Agreement to the Company. 
 5.6 Cross Receipt. The Purchaser
shall have delivered to the Company a cross-receipt executed by the Purchaser certifying that it has received from the Company the number of shares of Stock set forth opposite the Purchaser’s name on Exhibit A. 

5.7 Funding. The Purchaser shall have delivered to the Company payment of the Purchase Price by wire transfer of immediately available
funds to an account designated in advance of the Closing by the Company. 
 5.8 Backstop Agreement. B. Riley Securities, Inc., an
affiliate of the Purchaser, shall have executed and delivered the Backstop Agreement to the Company. 
 6. Miscellaneous. 

6.1 Survival of Warranties. Unless otherwise set forth in this Agreement, the representations and warranties of the Company and the
Purchaser contained in or made pursuant to this Agreement shall survive the execution and delivery of this Agreement and the Closing and shall in no way be affected by any investigation or knowledge of the subject matter thereof made by or on behalf
of the Purchaser or the Company. 
 6.2 Successors and Assigns. The terms and conditions of this Agreement shall inure to the benefit
of and be binding upon the respective successors and assigns of the parties. Nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective successors and assigns any rights,
remedies, obligations or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement. 
 6.3
Governing Law. This Agreement shall be governed by the internal law of the State of Delaware, without regard to conflict of law principles that would result in the application of any law other than the law of the State of Delaware. 

  
 12 

 6.4 Counterparts. This Agreement may be executed in two (2) or more
counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Counterparts may be delivered via electronic mail (including pdf or any electronic signature complying with the U.S.
federal ESIGN Act of 2000, e.g., www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes. 

6.5 Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement. 
 6.6 Notices. 

(a) General. All notices and other communications given or made pursuant to this Agreement shall be in writing and shall be deemed
effectively given upon the earlier of actual receipt, or (a) personal delivery to the party to be notified, (b) when sent, if sent by electronic mail during normal business hours of the recipient, and if not sent during normal business
hours, then on the recipient’s next business day, (c) five (5) days after having been sent by registered or certified mail, return receipt requested, postage prepaid, or (d) one (1) business day after deposit with a
nationally recognized overnight courier, freight prepaid, specifying next business day delivery, with written verification of receipt. All communications shall be sent to the respective parties at their address as set forth below, or to such e-mail address, or address as subsequently modified by written notice given in accordance with this Section 6.6. 

 

			
	if to the Company:	  	 Charah Solutions, Inc.
 12601 Plantside
Drive
 Louisville, KY 40299
 Facsimile No:

Attention: Steve Brehm
 Email:

		
	with a copy to (which shall not constitute notice):	  	 Vinson & Elkins LLP
 2001 Ross Avenue,
Suite 3900
 Dallas, TX 75201
 Facsimile No:

Attention: Robert L. Kimball
 Email:

		
	if to the Purchaser:	  	 c/o B. Riley Securities, Inc.
 11100 Santa
Monica Blvd., Suite 800
 Los Angeles, CA 90025
 Attention: Alan
Forman, Esq.

		
	with a copy to (which shall not constitute notice):	  	 Duane Morris LLP
 1540 Broadway

New York, NY 10036
 Attention: Dean Colucci

  
 13 

 (b) Consent to Electronic Notice. The Purchaser consents to the delivery of any
stockholder notice pursuant to Section 232 of the DGCL (or any successor thereto) at the e-mail address set forth below the Purchaser’s name on the signature page or
Exhibit A, as updated from time to time by notice to the Company. To the extent that any notice given by means of electronic transmission is returned or undeliverable for any reason, the foregoing consent shall be deemed to
have been revoked until a new or corrected e-mail address has been provided, and such attempted electronic notice shall be ineffective and deemed to not have been given. The Purchaser agrees to promptly notify
the Company of any change in its e-mail address, and that failure to do so shall not affect the foregoing. 

6.7 Fees and Expenses. At the Closing, the Company shall reimburse the Purchaser for reasonable documented fees and expenses of the
counsel for the Purchaser in an amount not to exceed $35,000. 
 6.8 Attorneys’ Fees. If any action at law or in
equity (including, arbitration) is necessary to enforce or interpret the terms of this Agreement, the prevailing party shall be entitled to reasonable attorneys’ fees, costs and necessary disbursements in addition to any other relief to which
such party may be entitled. 
 6.9 Amendments and Waivers. Any term of this Agreement may be amended, terminated or waived only with
the written consent of the Company and the holders of at least a majority of the then-outstanding Shares. Any amendment or waiver effected in accordance with this Section 6.9 shall be binding upon the Purchaser and each
transferee of the Shares (or any securities issued in exchange for such Shares), each future holder of all such securities, and the Company. 

6.10 Severability. The invalidity or unenforceability of any provision hereof shall in no way affect the validity or enforceability of
any other provision. 
 6.11 Delays or Omissions. No delay or omission to exercise any right, power or remedy accruing to any party
under this Agreement, upon any breach or default of any other party under this Agreement, shall impair any such right, power or remedy of such non-breaching or
non-defaulting party nor shall it be construed to be a waiver of any such breach or default, or an acquiescence therein, or of or in any similar breach or default thereafter occurring; nor shall any waiver of
any single breach or default be deemed a waiver of any other breach or default theretofore or thereafter occurring. Any waiver, permit, consent or approval of any kind or character on the part of any party of any breach or default under this
Agreement, or any waiver on the part of any party of any provisions or conditions of this Agreement, must be in writing and shall be effective only to the extent specifically set forth in such writing. All remedies, either under this Agreement or by
law or otherwise afforded to any party, shall be cumulative and not alternative. 
 6.12 Entire Agreement. This Agreement (including
any Exhibits hereto) constitute the full and entire understanding and agreement between the parties with respect to the subject matter hereof, and any other written or oral agreement relating to the subject matter hereof existing between the parties
are expressly canceled. 

  
 14 

 6.13 Dispute Resolution. The parties (a) hereby irrevocably and unconditionally
submit to the jurisdiction of the state courts of Delaware and to the jurisdiction of the United States District Court for the District of Delaware for the purpose of any suit, action or other proceeding arising out of or based upon this Agreement,
(b) agree not to commence any suit, action or other proceeding arising out of or based upon this Agreement except in the state courts of Delaware or the United States District Court for the District of Delaware, and (c) hereby waive, and
agree not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject personally to the jurisdiction of the above-named courts, that its property is exempt or immune from
attachment or execution, that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that this Agreement or the subject matter hereof may not be enforced in or by such
court. 
 WAIVER OF JURY TRIAL: TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, EACH PARTY HEREBY WAIVES ITS RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE
OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT, THE OTHER TRANSACTION DOCUMENTS, THE SECURITIES OR THE SUBJECT MATTER HEREOF OR THEREOF. THE SCOPE OF THIS WAIVER IS INTENDED TO BE ALL-ENCOMPASSING OF
ANY AND ALL DISPUTES THAT MAY BE FILED IN ANY COURT AND THAT RELATE TO THE SUBJECT MATTER OF THIS TRANSACTION, INCLUDING, WITHOUT LIMITATION, CONTRACT CLAIMS, TORT CLAIMS (INCLUDING NEGLIGENCE), BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW AND
STATUTORY CLAIMS. THIS SECTION HAS BEEN FULLY DISCUSSED BY EACH OF THE PARTIES HERETO AND THESE PROVISIONS WILL NOT BE SUBJECT TO ANY EXCEPTIONS. EACH PARTY HERETO HEREBY FURTHER WARRANTS AND REPRESENTS THAT SUCH PARTY HAS REVIEWED THIS WAIVER WITH
ITS LEGAL COUNSEL, AND THAT SUCH PARTY KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL. 

6.14 No Commitment for Additional Financing. The Company acknowledges and agrees that the Purchaser has not made any representation,
undertaking, commitment, or agreement to provide or assist the Company in obtaining any financing, investment, or other assistance, other than the purchase of the Shares as set forth herein and subject to the conditions set forth herein and other
than the Backstop Agreement. In addition, the Company acknowledges and agrees that (i) no statements, whether written or oral, made by the Purchaser or its representatives on or after the date of this Agreement shall create an obligation,
commitment, or agreement to provide or assist the Company in obtaining any financing or investment, (ii) the Company shall not rely on any such statement by the Purchaser or its representatives, and (iii) an obligation, commitment, or
agreement to provide or assist the Company in obtaining any financing or investment may only be created by a written agreement, signed by the Purchaser and the Company, setting forth the terms and conditions of such financing or investment and
stating that the parties intend for such writing to be a binding obligation or agreement. The Purchaser shall have the right, in its sole and absolute discretion, to refuse or decline to participate in any other financing of or investment in the
Company, and shall have no obligation to assist or cooperate with the Company in obtaining any financing, investment, or other assistance. 

[Signature Page Follows] 

  
 15 

 IN WITNESS WHEREOF, the parties have executed this Stock Purchase Agreement as of the date
first written above. 
  

			
	
	COMPANY:
	
	CHARAH SOLUTIONS, INC.
		
	By:	 	 /s/ Scott Sewell

	Name:	 	Scott Sewell
	Title:	 	President and Chief Executive Officer

 [SIGNATURE PAGE TO STOCK
PURCHASE AGREEMENT] 

 IN WITNESS WHEREOF, the parties have executed this Stock Purchase Agreement as of the date
first written above. 
  

			
	PURCHASER:
	
	B. RILEY SECURITIES, INC.
		
	By:	 	 /s/ Andy Moore

	Name:	 	Andy Moore
	Title:	 	Chief Executive Officer

 [SIGNATURE PAGE TO STOCK
PURCHASE AGREEMENT] 

 EXHIBITS 

 

			
	Exhibit A	  	SCHEDULE OF PURCHASERS

 EXHIBIT A 

SCHEDULE OF PURCHASERS 
  

									
	 Name, Address and Email of
Purchaser
	  	Shares of Common Stock Purchased for
Cash	 	  	Cash Purchase
Price	 
	 B. Riley Securities, Inc.
 11100 Santa
Monica Blvd., Suite 800
 Los Angeles, CA 90025
	  	 	2,888,889	 	  	$	13,000,000.50	 
	 TOTAL
	  	 	2,888,889	 	  	$	13,000,000.50	 

  
 A-1EX-10.2

 Exhibit 10.2 

EXECUTION VERSION 

AMENDMENT NO. 5 TO CREDIT AGREEMENT AND WAIVER 

This AMENDMENT NO. 5 TO CREDIT AGREEMENT AND WAIVER (this “Amendment”) dated as of August 3, 2021, is made
among CHARAH SOLUTIONS, INC., a Delaware corporation (the “Borrower”), BANK OF AMERICA, N.A., in its capacity as administrative agent for the Lenders (as defined below) (in such capacity, the “Administrative
Agent”), the Lenders party hereto (each, a “Consenting Lender”), and the undersigned Guarantors. Each capitalized term used and not otherwise defined in this Amendment has the definition specified in the Credit Agreement
described below. 
 RECITALS: 

A. The Borrower, the Guarantors, the Administrative Agent and certain financial institutions party thereto from time to time (the
“Lenders”) have entered into that certain Credit Agreement dated as of September 21, 2018 (as amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement”), pursuant to which
the Lenders have made available to the Borrower a Revolving Facility and a Term Facility. 
 B. The Borrower has requested that
Administrative Agent and the Lenders waive compliance with the financial covenants set forth in Sections 7.11(a) and (b) of the Credit Agreement for the measurement period ended June 30, 2021 and amend such financial covenants for the
measurement period ending September 30, 2021, and the Administrative Agent and the Consenting Lenders are willing to do so on the terms and conditions set forth herein. 

In consideration of the premises and further valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties
hereto agree as follows: 
 Section 1. Amendments to Credit Agreement. Subject to the terms and
conditions set forth herein and in reliance upon the representations and warranties set forth herein, as of the date on which this Amendment becomes effective, the parties hereto hereby agree that the Credit Agreement shall be amended as follows:

 (a) Section 7.11(a) of the Credit Agreement is amended and restated in its entirety to read as follows: 

(a) Consolidated Net Leverage Ratio. Permit the Consolidated Net Leverage Ratio at any time during the periods set forth
below to be greater than the ratio set forth below opposite such period: 
  

			
	 Period
	  	Maximum Consolidated
Net Leverage Ratio
	 December 31, 2020 through September 30, 2021
	  	5.50 to 1.00
	 October 1, 2021 through December 30, 2021
	  	4.50 to 1.00
	 December 31, 2021 and thereafter
	  	3.50 to 1.00

 (b) Section 7.11(b) of the Credit Agreement is amended and restated in its entirety to read as follows: 

(b) Consolidated Fixed Charge Coverage Ratio. Permit the Consolidated Fixed Charge Coverage Ratio as of the end of the
Measurement Period ending March 31, 2021 to be less than 1.00 to 1.00, as of the end of the Measurement Period ending June 30, 2021 to be less than 1.20 to 1.00, as of the end of the Measurement Period ending September 30, 2021 to be
less than 1.10 to 1.00 and as of the end of each Measurement Period ending thereafter to be less than 1.20 to 1.00. 

 Section 2. Waiver. Subject to the terms and
conditions set forth herein, and in reliance upon the representations and warranties of the Borrower made herein, the Lenders hereby waive compliance with Sections 7.11(a) and (b) of the Credit Agreement for the four fiscal quarter period ended
June 30, 2021. The waiver set forth in this Section 2 is limited to the extent specifically set forth above and shall in no way serve to waive any other terms, covenants or provisions of the Credit Agreement or any other Loan Document, or
any obligations of the Borrower, other than as expressly set forth above. The Borrower hereby consents, acknowledges and agrees to the waiver set forth herein and hereby confirms and ratifies in all respects the Credit Agreement as amended hereby
and the enforceability of such Credit Agreement against the Borrower in accordance with its terms. 
 Section 3.
Effectiveness; Conditions Precedent. This Amendment shall become effective on the date when the following conditions shall have been satisfied or waived (such date, the “Effective Date”): 

(a) the Administrative Agent’s receipt of this Amendment, duly executed by the Borrower, the Administrative Agent, and the Required
Lenders (which counterparts may be delivered by facsimile, electronic email or other electronic means (including PDF) with originals to follow) in form and substance reasonably satisfactory to the Administrative Agent; 

(b) the Borrower shall have prepaid not less than $5,000,000 of the principal balance of the Closing Date Term Loans outstanding under the
Credit Agreement as of July 29, 2021 (together with accrued interest thereon and other amounts payable in connection therewith as provided in Section 2.05(a) of the Credit Agreement) and shall have instructed the Administrative Agent to
apply such prepayment to the principal installments of the Closing Date Term Loans in inverse order of maturity; and 
 (c) the
Administrative Agent’s receipt of the work fee in the amount of $2,000,000 earned in connection with Amendment No. 3 to the Credit Agreement, to be paid to each Lender that consented to Amendment No. 3 on a pro rata basis in
proportion to the Total Credit Exposure (at the time of execution of Amendment No. 3) of such Lender (or its assignees) to the aggregate Total Credit Exposure (at the time of execution of Amendment No. 3) of all such consenting Lenders (or
their assignees), it being understood and agreed that the Borrower’s payment of such work fee in accordance with this Amendment shall satisfy in full the Borrower’s corresponding payment obligations with respect thereto arising under the
fee letter executed in connection with Amendment No. 3 to the Credit Agreement. 
 Section 4.
Representations and Warranties. In order to induce the Administrative Agent and the Consenting Lenders to enter into this Amendment, the Borrower and each Guarantor represents and warrants to the Administrative Agent and the Lenders as
follows: 
 (a) The representations and warranties made by it in Article V of the Credit Agreement, and by each Loan Party in each of
the Loan Documents to which such Loan Party is a party, or in any document furnished at any time under or in connection therewith, are (i) with respect to representations and warranties that contain a materiality qualification, true and correct
in all respects as of the date hereof and (ii) with respect to representations and warranties that do not contain a materiality qualification, true and correct in all material respects on and as of the date hereof, except in each case
(A) to the extent that such representations and warranties expressly relate to an earlier date, in which case such representations and warranties are true and correct in all material respects as of such earlier date and (B) the
representations and warranties contained in Sections 5.05(a) and (b) of the Credit Agreement shall be deemed to refer to the most recent statements furnished pursuant to Sections 6.01(a) and (b) thereof,
respectively; 

  
 2 

 (b) Since the date of the most recent financial reports of the Borrower and its Subsidiaries
delivered pursuant to Section 6.01(a) of the Credit Agreement, no act, event, condition or circumstance has occurred or arisen which, singly or in the aggregate with one or more other acts, events, occurrences or conditions
(whenever occurring or arising), has had or could reasonably be expected to have a Material Adverse Effect; 
 (c) This Amendment has been
duly authorized, executed and delivered by the Borrower and each Guarantor and constitutes a legal, valid and binding obligation of the Borrower and each Guarantor, except as may be limited by general principles of equity or by the effect of any
applicable bankruptcy, insolvency, reorganization, moratorium or similar law affecting creditors’ rights generally; and 
 (d) As of the
date hereof, after giving effect to this Amendment, no Default or Event of Default has occurred that is continuing. 

Section 5. Entire Agreement. This Amendment, together with all the Loan Documents (collectively, the
“Relevant Documents”), sets forth the entire understanding and agreement of the parties hereto in relation to the subject matter hereof and supersedes any prior negotiations and agreements among the parties relating to such subject
matter. No promise, condition, representation or warranty, express or implied, not set forth in the Relevant Documents shall bind any party hereto, and no such party has relied on any such promise, condition, representation or warranty. Each of the
parties hereto acknowledges that, except as otherwise expressly stated in the Relevant Documents, no representations, warranties or commitments, express or implied, have been made by any party to the other in relation to the subject matter hereof or
thereof. None of the terms or conditions of this Amendment may be changed, modified, waived or canceled orally or otherwise, except in writing and in accordance with Section 11.01 of the Credit Agreement. 

Section 6. Full Force and Effect of Agreement. Except as hereby specifically amended, modified or
supplemented, the Credit Agreement and all other Loan Documents are hereby confirmed and ratified in all respects and shall be and remain in full force and effect according to their respective terms. This Amendment shall not be deemed (i) to be
a waiver of, or consent to, or a modification or amendment of, any other term or condition of the Credit Agreement or any other Loan Document other than as expressly set forth herein, (ii) to prejudice any right or rights which the
Administrative Agent or the Lenders may now have or may have in the future under or in connection with the Credit Agreement or the other Loan Documents or any of the instruments or agreements referred to therein, as the same may be amended,
restated, supplemented or modified from time to time other than as expressly set forth herein, or (iii) to be a commitment or any other undertaking or expression of any willingness to engage in any further discussion with the Borrower, any Loan
Party or any other Person with respect to any other waiver, amendment, modification or any other change to the Credit Agreement or the Loan Documents or any rights or remedies arising in favor of the Lenders or the Administrative Agent, or any of
them, under or with respect to any such documents. References in the Credit Agreement to “this Agreement” (and indirect references such as “hereunder”, “hereby”, “herein”, “hereof” or other words of
like import) and in any Loan Document to the “Credit Agreement” shall be deemed to be references to the Credit Agreement as modified hereby. 

Section 7. Counterparts. This Amendment may be executed in any number of counterparts, each of which
shall be deemed an original as against any party whose signature appears thereon, and all of which shall together constitute one and the same instrument. Delivery of an executed counterpart of a signature page of this Amendment by telecopy or other
electronic means shall be effective as delivery of a manually executed counterpart of this Amendment. 

Section 8. Governing Law; Jurisdiction, Etc. This Amendment shall in all respects be governed by, and
construed in accordance with, the laws of the State of New York, and shall be further subject to the provisions of Sections 11.14 and 11.15 of the Credit Agreement. 

  
 3 

 Section 9. Enforceability. Should any one or more of
the provisions of this Amendment be determined to be illegal or unenforceable as to one or more of the parties hereto, all other provisions nevertheless shall remain effective and binding on the parties hereto. 

Section 10. Successors and Assigns. This Amendment shall be binding upon and inure to the benefit of
the Borrower, each Guarantor, the Administrative Agent and each Lender, and their respective successors and assignees to the extent such assignees are permitted assignees as provided in Section 11.06 of the Credit
Agreement. 
 Section 11. Costs and Expenses. In accordance with
Section 11.04(a) of the Credit Agreement, the Borrower hereby agrees to pay on demand all reasonable and documented out-of-pocket expenses of
the Administrative Agent (including the reasonable and documented fees and expenses of counsel for the Administrative Agent) in connection with the preparation, execution and delivery of this Amendment and any other related documents. 

Section 12. Release; Indemnification. 

(a) Release. In further consideration of the Administrative Agent’s and the Consenting Lenders’ execution of this Amendment,
the Borrower and the Guarantors, individually and on behalf of their successors (including any trustees or any debtor-in-possession acting on behalf of the Borrower or a
Guarantor), assigns, subsidiaries and affiliates, hereby forever release the Administrative Agent, the Lenders and their successors, assigns, parents, subsidiaries, and affiliates and their officers, employees, directors, agents and attorneys
(collectively, the “Releasees”) from any and all debts, claims, demands, liabilities, responsibilities, disputes, causes, damages, actions and causes of actions (whether at law or in equity), and obligations of every nature whatsoever
(other than any obligations to advance Loans under and in accordance with the Credit Agreement), whether liquidated or unliquidated, whether matured or unmatured, whether fixed or contingent that the Borrower or any Guarantor has or may have against
the Releasees, or any of them, in each case which arise from or relate to any actions which the Releasees, or any of them, have or may have taken or omitted to take in connection with the Credit Agreement or the other Loan Documents prior to the
date hereof (including with respect to the Obligations, any Collateral and any third parties liable in whole or in part for the Obligations); provided that neither the Borrower nor any Guarantor is waiving any defense to expense reimbursement or
indemnification expressly set forth in Section 11.04 of the Credit Agreement. This provision shall survive and continue in full force and effect whether or not the Borrower shall satisfy all other provisions of the Credit
Agreement or the other Loan Documents. 
 (b) Related Indemnity. The Borrower and each Guarantor hereby agree that its release of the
Releasees set forth in Section 11(a) shall include an obligation to indemnify and hold the Releasees, or any of them, harmless with respect to any and all liabilities, obligations, losses, penalties, actions, judgments,
suits, costs, expenses or disbursements of any kind or nature whatsoever incurred by the Releasees, or any of them, whether direct, indirect or consequential, as a result of or arising from or relating to any proceeding by, or on behalf of any
Person, including officers, directors, agents, trustees, creditors, partners or shareholders of the Borrower or any Guarantor or any parent, subsidiary or affiliate of the Borrower or such Guarantor, whether threatened or initiated, asserting any
claim for legal or equitable remedy under any statutes, regulation, common law principle or otherwise arising from or in connection with the negotiation, preparation, execution, delivery, performance, administration and enforcement of this Amendment
or any other document executed in connection herewith; provided, that the Borrower shall not be liable for any indemnification to a Releasee to the extent that any such liability, obligation, loss, penalty, action, judgment, suit, cost, expense or
disbursement results from (i) the applicable Releasee’s gross negligence, willful misconduct or breach in bad faith, as finally determined by a court of competent jurisdiction, (ii) a claim brought by the Borrower or any other
Guarantor against an Indemnitee for a material breach in bad faith of such Releasee’s obligations under the Credit Agreement or under any other Loan Document if the Borrower 

  
 4 

 
or such Guarantor has obtained a final, non-appealable judgment in its favor on such claim as determined by a court of competent jurisdiction, or
(iii) a dispute solely among the Releasees and not arising out of any act or omission of the Borrower or any of its Subsidiaries or Affiliates (other than any claim against an Indemnitee in its capacity or in fulfilling its role as an Arranger,
the Administrative Agent, the Swingline Lender or an L/C Issuer under the Credit Agreement). The foregoing indemnity shall survive the payment in full of the Obligations and the termination of the Credit Agreement and the other Loan Documents. 

Section 13. Reaffirmation. 

(a) Each Loan Party hereby acknowledges that it expects to realize substantial direct and indirect benefits as a result of this Amendment. 

(b) Each Loan Party hereby acknowledges its receipt of this Amendment and its review of the terms and conditions hereof, and consents to the
terms and conditions of this Amendment and the transactions contemplated herein. 
 (c) Each Loan Party hereby (i) affirms and confirms
each of its guarantees, pledges, grants and other agreements under each Collateral Document, (ii) affirms that it has the right, power and authority and has taken all necessary corporate and other action to authorize the execution, delivery and
performance of this Amendment and (iii) agrees that, notwithstanding the effectiveness of this Amendment, each Security Document and all guarantees, pledges, grants and other agreements thereunder shall continue to be in full force and effect
in respect of, and to secure, the Secured Obligations. 
 [Signature pages follow] 

 

  
 5 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be made, executed and
delivered by their duly authorized officers as of the day and year first above written. 
  

					
	BORROWER:
	
	CHARAH SOLUTIONS, INC., a Delaware corporation
		
	By:	 	 /s/ Scott Sewell

	Name:	 	Scott Sewell
	Title:	 	President & CEO
	
	GUARANTORS:
	
	ASH MANAGEMENT SERVICES, LLC, a Kentucky limited liability company
		
	By:	 	Charah, LLC
		 	its sole member and sole manager
			
		 	By:	 	 /s/ Scott Sewell

		 	Name:	 	Scott Sewell
		 	Title:	 	President & CEO
	
	CHARAH MANAGEMENT LLC, a Delaware limited liability company
		
	By:	 	Charah Solutions, Inc.,
		 	its sole member and sole manager
			
		 	By:	 	 /s/ Scott Sewell

		 	Name:	 	Scott Sewell
		 	Title:	 	President & CEO
	
	CHARAH PLANT SERVICES, LLC, a Delaware limited liability company
		
	By:	 	Allied Power Management, LLC,
		 	its sole member
		
	By:	 	Allied Power Holdings, LLC,
		 	its sole member
		
	By:	 	Charah Solutions, Inc.,
		 	its sole member and sole manager
			
		 	By:	 	 /s/ Scott Sewell

		 	Name:	 	Scott Sewell
		 	Title:	 	President & CEO

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
					
	CHARAH SOLE MEMBER LLC, a Delaware limited liability company
		
	By:	 	Charah Management LLC,
		 	its sole member and managing member
		
	By:	 	Charah Solutions, Inc.,
		 	its sole member and sole manager
			
		 	By:	 	 /s/ Scott Sewell

		 	Name:	 	Scott Sewell
		 	Title:	 	President & CEO
	
	CHARAH, LLC, a Kentucky limited liability company
		
	By:	 	Charah Sole Member LLC,
		 	its sole member and sole manager
		
	By:	 	Charah Management LLC,
		 	its sole member and managing member
		
	By:	 	Charah Solutions, Inc.,
		 	its sole member and sole manager
			
		 	By:	 	 /s/ Scott Sewell

		 	Name:	 	Scott Sewell
		 	Title:	 	President & CEO
	
	MERCURY CAPTURE BENEFICIATION, LLC, a Delaware limited liability company
		
	By:	 	Charah, LLC its sole manager
			
		 	By:	 	 /s/ Scott Sewell

		 	Name:	 	Scott Sewell
		 	Title:	 	President & CEO
	
	MERCURY CAPTURE INTELLECTUAL PROPERTY, LLC, a Delaware limited liability company
		
	By:	 	Charah, LLC its sole manager
			
		 	By:	 	 /s/ Scott Sewell

		 	Name:	 	Scott Sewell
		 	Title:	 	President & CEO

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	NUTEK MICRO-GRINDING, LLC, a Connecticut limited liability company
	
	By: Charah, LLC its sole manager
		
	        By:	 	 /s/ Scott Sewell

	        Name:	 	Scott Sewell
	        Title:	 	President & CEO
	
	SCB INTERNATIONAL HOLDINGS, LLC, a Delaware limited liability company
	
	By: Charah, LLC its sole member and sole manager
		
	        By:	 	 /s/ Scott Sewell

	        Name:	 	Scott Sewell
	        Title:	 	President & CEO
	
	SCB TRADING, LLC, a Connecticut limited liability company
	
	By: Charah, LLC its sole manager
		
	        By:	 	 /s/ Scott Sewell

	        Name:	 	Scott Sewell
	        Title:	 	President & CEO

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	ADMINISTRATIVE AGENT:
	
	BANK OF AMERICA, N.A.,
	as Administrative Agent
		
	By:	 	 /s/ Denise Jones

	Name:	 	Denise Jones
	Title:	 	Vice President

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	LENDERS:
	
	BANK OF AMERICA, N.A.,
	as a Lender, L/C Issuer and Swingline Lender
		
	By:	 	 /s/ G. Christopher Miller

	Name:	 	G. Christopher Miller
	Title:	 	Senior Vice President

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	 REGIONS BANK,
 as a
Lender

		
	By:	 	 /s/ Arthur E. Cutler

	Name:	 	Arthur E. Cutler
	Title:	 	Senior Vice President

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	FIRST HORIZON BANK, a Tennessee banking corporation, successor by conversion to First Tennessee Bank National Association, a national banking, as a Lender
		
	By:	 	 /s/ Jim Hennigan

	Name:	 	Jim Hennigan
	Title:	 	Senior Vice President

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	 PINNACLE BANK,
 as a
Lender

		
	By:	 	 /s/ William L. Fuson

	Name:	 	William L. Fuson
	Title:	 	Senior Vice President

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	 U.S. BANK NATIONAL ASSOCIATION,

as a Lender

		
	By:	 	 /s/ David C. Heyson

	Name:	 	David C. Heyson
	Title:	 	Senior Vice President

  
 Charah Solutions, Inc.

 Amendment No. 5 to Credit Agreement 

Signature Page 

 
			
	ALCOF II NUBT, L.P., as a Lender
	
	By: Arbour Lane Fund II GP, LLC
	
	Its: General Partner
		
	        By:	 	 /s/ Dan Galanter

	        Name: Dan Galanter
	        Title:   Manager

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