Document:

EX-10.19(a)

 Exhibit 10.19(a) 

SIXTH AMENDMENT TO LOAN AGREEMENT 

THIS SIXTH AMENDMENT TO LOAN AGREEMENT (herein called this “Sixth Amendment”) is made as of May 9, 2014 by and between
QUEST RESOURCE MANAGEMENT GROUP, LLC, a Delaware limited liability company (formerly known as QUEST RECYCLING SERVICES, LLC) (“Borrower”), and REGIONS BANK (“Lender”). 

W I T N E S S E T H: 
 WHEREAS,
Borrower and Lender have entered into that certain Loan Agreement dated as of December 15, 2010, (said Loan Agreement, as amended, restated, or otherwise modified from time to time, the “Loan Agreement”), for the purposes and
consideration therein expressed; and 
 NOW, THEREFORE, in consideration of the premises and the mutual covenants and agreements contained
herein and in the Loan Agreement and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto do hereby agree as follows: 

ARTICLE I. 
 Definitions and
References 
 1.1 Terms Defined in the Loan Agreement. Unless the context otherwise requires or unless otherwise expressly
defined herein, the terms defined in the Loan Agreement shall have the same meanings whenever used in this Sixth Amendment. 
 ARTICLE II.

 Amendment to Loan Agreement 

2.1 Amendments to Section 1.1. 

(a) The definition of “Applicable Margin” set forth in Section 1.1 of the Loan Agreement is hereby
amended and restated to read in its entirety as follows: 
 “Applicable Margin” means (a) 2.50% per annum with
respect to Eurodollar Rate Loans and (b) 1.50% per annum with respect to Base Rate Loans. 
 (b) The definition of
“Borrowing Base” set forth in Section 1.1 of the Loan Agreement is hereby amended and restated to read in its entirety as follows: 

“Borrowing Base” means an amount equal to (a) 80% of Eligible Wal-Mart Accounts plus (b) 85% of Eligible Accounts.

  
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AMENDMENT TO LOAN AGREEMENT – PAGE 1 

 (c) Section 1.1 of the Loan Agreement is hereby amended to add the
following definition in alphabetical order to read in its entirety as follows: 
 “Dividends and Distributions” means
(a) cash dividends or any other distributions of property, or otherwise, on, or in respect of, any class of equity interests of any Person, (b) any and all funds, cash or other payments made in respect of the redemption, repurchase or
acquisition of such equity interests or (c) any other dividend or distribution made by such Person. 
 (d) The
definition of “EBITDA” set forth in Section 1.1 of the Loan Agreement is hereby deleted in its entirety. 

(e) Section 1.1 of the Loan Agreement is hereby amended to add the following definition in alphabetical order to
read in its entirety as follows: 
 “EBITDAS” means, for any period of determination, for the Borrower and its
Subsidiaries, the sum of consolidated Net Income for such period, as determined in accordance with GAAP, plus (to the extent that such items were deducted in the calculation of consolidated Net Income for the period) the sum of (a) Interest
Expense, (b) Taxes, (c) depreciation, (d) amortization, (e) charges related to the impairment of goodwill and (f) non-cash stock-based compensation expense. 

(f) Section 1.1 of the Loan Agreement is hereby amended delete the definition of the term “Eligible
Accounts” and to replace it to read in its entirety as follows: 
 “Eligible Accounts” means, at any time, all
Accounts of the Borrower or any of its Subsidiaries created in the ordinary course of business and satisfying the following conditions: 

(a) The Account complies with all applicable laws, rules, and regulations, including, without limitation, usury laws, the Federal Truth in
Lending Act, and Regulation Z of the Board of Governors of the Federal Reserve System; 
 (b) The Account has not been outstanding for more
than ninety (90) days past the original date of invoice; 
 (c) The Account does not represent a commission, and the Account is owed as
a result of (i) the sale of goods by the Borrower or any of its Subsidiaries in the ordinary course of business and such sale has been consummated and such goods have been shipped and delivered and received by the Account Debtor, or
(ii) services performed or to be performed by the Borrower or any of its Subsidiaries in the ordinary course of business; 

  
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 (d) The Account arises from an enforceable contract; 

(e) The Account does not arise from the sale of any good that is on a
bill-and-hold, guaranteed sale, sale-or-return, sale on approval, consignment, progress
billing, COD, or any other repurchase or return basis; 
 (f) The Borrower or any of its Subsidiaries has good and indefeasible title to the
Account and the Account is not subject to any Lien except Liens in favor of the Lender; 
 (g) The Account does not arise out of a contract
with or order from an Account Debtor that, by its terms, prohibits or makes void or unenforceable the grant of a security interest by the Borrower or any of its Subsidiaries to the Lender in and to such Account; 

(h) The Account is not subject to any setoff, counterclaim, defense, dispute, recoupment, or adjustment other than normal discounts for prompt
payment; 
 (i) The Account Debtor is not insolvent or the subject of any bankruptcy or insolvency proceeding and has not made an assignment
for the benefit of creditors, suspended normal business operations, dissolved, liquidated, terminated its existence, ceased to pay its debts as they become due, or suffered a receiver or trustee to be appointed for any of its assets or affairs; 

(j) The Account is not evidenced by chattel paper or an instrument; 

(k) No default exists under the Account by any party thereto; 

(l) The Account Debtor has not returned or refused to retain, or otherwise notified the Borrower or any of its Subsidiaries of any dispute
concerning, or claimed nonconformity of, any of the goods from the sale of which the Account arose; 
 (m) The Account is not owed by an
Affiliate, employee, officer, or director of the Borrower or any of its Subsidiaries; 

  
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 (n) The Account is payable in Dollars by the Account Debtor; 

(o) The Account Debtor is domiciled in the United States of America or if the Account Debtor is domiciled outside of the United States of
America, the Accounts of such Account Debtor have been approved by the Lender or are backed by letters of credit in form and substance reasonably satisfactory to the Lender; 

(p) Not more than 20% of the aggregate balances then outstanding on Accounts owed by such Account Debtor and its Affiliates to the Borrower or
any of its Subsidiaries are more than 90 days past the dates of their original invoices; 
 (q) The Account Debtor is any Person other
than the United States of America, or any state, department, agency, or instrumentality thereof, unless the Borrower or the applicable Subsidiary has assigned such Account to Lender in accordance with any applicable assignment of claims act; 

(r) The aggregate of all Accounts owed by the Account Debtor and its Affiliates to which the Account relates does not exceed 20% of all
Accounts owed by all of the Borrower’s and its Subsidiaries’ Account Debtors; provided, however, that this subsection shall not apply to any Accounts for which Wal-Mart/Sam’s is the Account Debtor; and further provided,
that if such Accounts exceeds 20% of all Accounts owed by all of the Account Debtors of the Borrower and its Subsidiaries, such portion of such Accounts not in excess of 20% shall be eligible; and 

(s) The Account is otherwise acceptable in the reasonable discretion of the Lender; provided that the Lender shall have the right to create
and adjust eligibility standards and related reserves with respect to such Account from time to time in its good faith credit judgment. 

The amount of the Eligible Accounts owed by an Account Debtor to the Borrower and its Subsidiaries shall be reduced by the amount of all
“contra accounts” (not including Accounts owed to the Borrower or any Subsidiary by the Lender) and other obligations owed by the Borrower or any Subsidiary to such Account Debtor. 

  
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AMENDMENT TO LOAN AGREEMENT – PAGE 4 

 (g) The definition of “Eligible Wal-Mart Accounts” set forth in
Section 1.1 of the Loan Agreement is hereby amended and restated to read in its entirety as follows: 
 “Eligible
Wal-Mart Accounts” means Eligible Accounts for which Wal-Mart/Sam’s is the Account Debtor. 
 (h) The
definition of “Fixed Charge Coverage Ratio” set forth in Section 1.1 of the Loan Agreement is hereby amended and restated to read in its entirety as follows: 

“Fixed Charge Coverage Ratio” means, for the Borrower and its Subsidiaries on a consolidated basis, and on any date of
determination, the ratio of (a) the sum of (i) EBITDAS minus (ii) Capital Expenditures minus (iii) the amount of all Dividends and Distributions permitted under this Agreement (including Permitted Distributions) to
(b) the sum of (i) all scheduled principal payments with respect to all Debt (including, without limitation, any Debt incurred pursuant to Section 8.5(f)) plus (ii) Interest Expense (including, without limitation,
any Interest Expense related to any Debt incurred pursuant to Section 8.5(f)), in all cases for the 12 months then ending. 

(i) The definition of “Guarantor” set forth in Section 1.1 of the Loan Agreement is hereby amended and
restated to read in its entirety as follows: 
 “Guarantor” means (a) Quest Resource Holding Corporation, a Nevada
corporation, (b) Earth 911, Inc., a Delaware corporation and (c) each other Person who from time to time guarantees all or any part of the Obligations. 

(j) Section 1.1 of the Loan Agreement is hereby amended to add the following definition in alphabetical order to
read in its entirety as follows: 
 “Permitted Acquisition” means any acquisition by Borrower, whether by purchase, merger
or otherwise, of all or substantially all of the assets of, all of the equity interests of, or a business line or unit or a division of, any Person; provided, 

(a) immediately prior thereto, and after giving effect thereto, no Default or Event of Default shall have occurred and be continuing or would
result therefrom; 
 (b) all transactions in connection therewith shall be consummated, in all material respects, in accordance with all
applicable laws; 

  
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AMENDMENT TO LOAN AGREEMENT – PAGE 5 

 (c) the Borrower shall be in compliance with the financial covenants set forth in Article
IX on a pro forma basis after giving effect to such acquisition as of the last day of the fiscal quarter most recently ended for which financial statements and other documentation have been, or were required to be, delivered in accordance with
Section 7.1(b); 
 (d) the Borrower shall have delivered to the Lender at least ten (10) Business Days prior to such
proposed acquisition, all available relevant financial information with respect to such acquired assets, a certificate confirming compliance with the requirements set forth herein, details regarding the aggregate consideration for such acquisition
and any other information reasonably requested by the Lender; 
 (e) any Person, assets or division acquired in accordance herewith shall be
in same business or lines of business in which the Borrower and/or its Subsidiaries are permitted to engage in pursuant to Section 8.10 or a business reasonably related or ancillary thereto; 

(f) the Borrower shall have a minimum liquidity consisting of available cash or cash equivalents plus availability under the Revolving Credit
Commitment of at least $3,000,000 after giving effect to such acquisition; and 
 (g) for any acquisition to qualify as a Permitted
Acquisition, the aggregate purchase price for all Permitted Acquisitions (after giving effect to such acquisition) during the life of this Agreement shall not exceed $4,500,000. 

(k) Section 1.1 of the Loan Agreement is hereby amended to add the following definition in alphabetical order to
read in its entirety as follows: 
 “Permitted Distributions” means, with respect to the Borrower or any Subsidiary of the
Borrower so long as such entity is taxable as a partnership for United States federal income tax purposes, tax distributions to any of the direct or indirect members of the Borrower or any Subsidiary of the Borrower, as applicable, in an aggregate
amount equal to (a) the sum of the highest marginal federal state and local income tax rates applicable to such member on ordinary income, multiplied by (b) the income from operations of the Borrower or any of the Subsidiaries, as
applicable (without taking into account any deductions or income allocated pursuant to Section 704(c) and Section 743 of the Code). 

  
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 (l) Section 1.1 of the Loan Agreement is hereby amended to add the
following definition in alphabetical order to read in its entirety as follows: 
 “Pledge Agreement” means that certain
Pledge Agreement, dated as of May 9, 2014, made by Earth911, Inc., a Delaware corporation, in favor of the Lender, as the same may be amended, restated, supplemented, modified, or changed from time to time. 

(m) The definition of “Revolving Credit Maturity Date” set forth in Section 1.1 of the Loan Agreement is
hereby amended and restated to read in its entirety as follows: 
 “Revolving Credit Maturity Date” means May 31,
2015, or such earlier date on which the Revolving Credit Commitment terminates and such amounts thereunder become due and payable as provided in this Agreement. 

(n) Section 1.1 of the Loan Agreement is hereby amended to add the following definition in alphabetical order to
read in its entirety as follows: 
 “Sixth Amendment Effective Date” means May 9, 2014. 

(o) The definition of “Total Funded Debt to EBITDA Ratio” set forth in Section 1.1 of the Loan Agreement
is hereby deleted in its entirety. 
 (p) Section 1.1 of the Loan Agreement is hereby amended to add the
following definition in alphabetical order to read in its entirety as follows: 
 “Total Funded Debt to EBITDAS Ratio”
means, with respect to the Borrower and its Subsidiaries on a consolidated basis, for any period of determination, the ratio of (a) Funded Debt to (b) EBITDAS for the 12-month period then ending. 

2.2 Amendment to Section 2.3. Section 2.3 of the Loan Agreement is hereby amended and restated in its entirety to read
as follows: 
 2.3 Use of Proceeds. The proceeds of the Revolving Credit Advances shall be used by the Borrower for working capital
purposes, Capital Expenditures, Permitted Acquisitions and general corporate purposes of the Borrower and its Affiliates in the ordinary course of business. 

  
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 2.3 Amendment to Article II. 

(a) Article II of the Loan Agreement is hereby amended to add a new Section 2.6 to read in its entirety as
follows: 
 2.6 Unused Fee. The Borrower agrees to pay to the Lender an unused fee on the daily average unused amount of the
Revolving Credit Commitment for the period from and including the Sixth Amendment Effective Date to and including the Revolving Credit Maturity Date, at the rate of one quarter of one percent (0.25%) per annum based on a 360 day year and the actual
number of days elapsed. For the purpose of calculating the commitment fee hereunder, the Revolving Credit Commitment shall be deemed utilized by the amount of all outstanding Revolving Credit Advances. Accrued commitment fee shall be payable in
arrears on the last Business Day of each March, June, September and December and on the Revolving Credit Maturity Date. 

(b) Article II of the Loan Agreement is hereby amended to add a new Section 2.7 to read in its entirety as
follows: 
 2.7 Increase in Commitments. 

(a) Request for Increase. Provided there exists no Default, upon notice to the Lender, the Borrower may on a one time basis, request an
increase in the Revolving Credit Commitment by an amount not exceeding $5,000,000, which shall be subject to the Lender’s sole reasonable discretion. 

(b) Notification by Lender. The Lender shall notify the Borrower of the Lender’s response to any request made by Borrower
hereunder within 60 days of the Borrower’s request, which request is subject to Lender’s approval in its sole reasonable discretion. 

(c) Effective Date. If the Revolving Credit Commitment is increased in accordance with this Section, the Lender and the Borrower shall
determine the effective date of such increase (the “Increase Effective Date”). 

  
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 (d) Conditions to Effectiveness of Increase. As a condition precedent to such increase,
the Borrower shall deliver to the Lender a certificate of each Loan Party signed by a responsible officer of such Loan Party and dated as of the Increase Effective Date (i) certifying and attaching the resolutions adopted by such Loan Party
approving or consenting to such increase and (ii) in the case of the Borrower, certifying that, before and after giving effect to such increase, (A) the representations and warranties contained in Article VI and in the other Loan
Documents are true and correct on and as of the Increase Effective Date with the same force and effect as if such representations and warranties had been made on and as of such date, except to the extent that such representations and warranties
speak to a specific date, and (B) no Default exists. In addition, the Borrower shall execute a new Note that amends and restates the existing Note evidencing the amount of such increase. 

2.4 Amendment to Section 7.1. Section 7.1 of the Loan Agreement is hereby amended and restated in its entirety to read
as follows: 
 7.1 Reporting Requirements. The Borrower will furnish to the Lender: 

(a) Annual Financial Statements of Borrower. As soon as available, and in any event within one hundred twenty (120) days after the
end of each fiscal year of the Borrower, beginning with the fiscal year ending December 31, 2013, a copy of an unaudited annual report of the Borrower and its Subsidiaries for such fiscal year containing, on a consolidated basis, balance sheets
and statements of income, retained earnings, and cash flow as at the end of such fiscal year and for the annual period then ended, in each case setting forth in comparative form the figures for the preceding fiscal year, all in reasonable detail and
certified by the chief financial officer, treasurer or comparable officer of Borrower to have been prepared in accordance with GAAP and to fairly and accurately present (subject to year-end audit adjustments) the financial condition and results of
operations of the Borrower and its Subsidiaries, on a consolidated basis, at the date and for the periods indicated therein; 
 (b)
Quarterly Financial Statements. As soon as available, and in any event within forty-five (45) days after the end of each calendar quarter, a copy of an unaudited financial report of the Borrower
and its Subsidiaries as of the end of such calendar quarter and for the portion of the fiscal year then ended, containing, on a consolidated basis, balance sheets and statements of income, and retained earnings, all in reasonable detail certified by
the chief financial officer, treasurer or comparable officer of Borrower to have been prepared in accordance with GAAP and to fairly and accurately present (subject to year-end audit adjustments) the financial
condition and results of operations of the Borrower and its Subsidiaries, on a consolidated basis, at the date and for the periods indicated therein; 

  
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 (c) Accounts Receivable Aging. As soon as available, and in any event no later than the
last day of each calendar month, an account receivable aging (as of the last day of the prior month), classifying the accounts receivable of the Borrower and any of its Subsidiaries in categories of 0-30, 31-60, 61-90 and over 90 days from date of invoice, reconciled to the general ledger account, and in such form and detail as the Lender shall reasonably require; 

(d) Accounts Payable Report. As soon as available, and in any event no later than the last day of each calendar month, an account
payable aging (as of the last day of the prior month), classifying the accounts payable of the Borrower and any of its Subsidiaries in categories of 0-30, 31-60, 61-90 and over 90 days from date of invoice, reconciled to the general ledger account, and in such form and detail as the Lender shall reasonably require; 

(e) Compliance Certificate. Concurrently with the delivery of the financial statements referred to in Section 7.1(a) and
7.1(b), a duly completed Compliance Certificate; 
 (f) Borrowing Base Report. For each calendar month, as soon as available,
and in any event no later than the last day of each calendar month, a duly completed Borrowing Base Report, in a form acceptable to the Lender, certified by the chief financial officer or comparable officer of the Borrower; 

(g) Notice of Litigation. Promptly after the commencement thereof, notice of all actions, suits, and proceedings before any
Governmental Authority or arbitrator affecting the Borrower or any Subsidiary which, if determined adversely to the Borrower or such Subsidiary, could have a Material Adverse Effect on the Borrower or such Subsidiary; 

  
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 (h) Notice of Default. As soon as possible and in any event within ten (10) days
after the occurrence of each Default, a written notice setting forth the details of such Default and the action that the Borrower has taken and proposes to take with respect thereto; 

(i) ERISA Reports. Promptly after the filing or receipt thereof, copies of all reports, including annual reports, and notices which the
Borrower or any Subsidiary files with or receives from the PBGC or the U.S. Department of Labor under ERISA; and as soon as possible and in any event within five (5) days after Borrower or any Subsidiary knows or has reason to know that any
Reportable Event or Prohibited Transaction has occurred with respect to any Plan or that the PBGC or Borrower or any Subsidiary has instituted or will institute proceedings under Title IV of ERISA to terminate any Plan, a certificate of the
chief financial officer or comparable officer of the Borrower setting forth the details as to such Reportable Event or Prohibited Transaction or Plan termination and the action that Borrower proposes to take with respect thereto; 

(j) Reports to Other Creditors. Promptly after the furnishing thereof, copies of any statement or report furnished to any other party
pursuant to the terms of any indenture, loan, or credit or similar agreement and not otherwise required to be furnished to the Lender pursuant to any other clause of this Section; 

(k) Notice of Material Adverse Effect. As soon as possible and in any event within five days after the occurrence thereof, written
notice of any matter that could have a Material Adverse Effect on the Borrower or any Subsidiary; 
 (l) Financial Reporting of
Guarantors. As soon as available, and in any event when required under the terms of each Guaranty, the financial information that each Guarantor is required to provide under the terms of such Guarantees, including the annual consolidated audited
financial statements of Quest Resource Holding Corporation and its Subsidiaries within 120 days after the end of each fiscal year and the quarterly company-prepared financial statements of Quest Resource Holding Corporation and its Subsidiaries,
within 45 days after the end of each calendar quarter, each as set forth in the Guaranty in more detail; and 

  
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 (m) General Information. Promptly, such other information concerning the Borrower, any
Subsidiary or any other Obligated Party as the Lender may from time to time reasonably request. 
 2.5 Amendment to Section 7.6.
Section 7.6 of the Loan Agreement is hereby amended and restated in its entirety to read as follows: 
 7.6 Inspection
Rights. At any reasonable time and from time to time, upon reasonable notice, the Borrower will permit, and will cause each Subsidiary to permit, representatives of the Lender to examine the Collateral and conduct Collateral audits and/or field
examinations, to examine, copy, and make extracts from its books and records, to visit and inspect its Property, and to discuss its business, operations, and financial condition with its officers, employees, and independent certified public
accountants. Such Collateral audits and /or field examinations shall be at the expense of the Borrower, and shall be conducted at least once during each calendar year, and may be conducted at the Lender’s discretion to the extent a Default
exists and is continuing. 
 2.6 Amendment to Section 8.3. Section 8.3 of the Loan Agreement is hereby amended and
restated in its entirety to read as follows: 
 8.3 Mergers, Etc. Without prior written consent of the Lender, Borrower will not, and
will not permit any Subsidiary to, become a party to a merger or consolidation, or purchase or otherwise acquire all or substantially all of the assets of any Person, or any shares or other evidence of beneficial ownership of any Person, or wind-up, dissolve, or liquidate, except that (a) Borrower may merge with any of its Subsidiaries so long as the Borrower is the survivor of such merger, (b) Subsidiaries may be merged with and into each
other and (c) the Borrower may consummate Permitted Acquisitions. 
 2.7 Amendment to Section 8.4. Section 8.4
of the Loan Agreement is hereby amended and restated in its entirety to read as follows: 
 8.4 Restricted Payments. The Borrower
will not declare or pay any Dividends and Distributions, or make any other payment or distribution (in cash, Property, or obligations) on account of its equity interests, or redeem, purchase, retire, or otherwise acquire any of its equity interests,
or permit any of its Subsidiaries to purchase or otherwise acquire any equity interest of the Borrower or another Subsidiary, or set apart any money for a sinking or other analogous fund for any dividend or other distribution on its equity interests
or for any redemption, purchase, retirement, or other acquisition of any of its equity interests; provided, however, that the Borrower may make Permitted Distributions so long as no Event of Default exists or would result therefrom. 

  
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 2.8 Amendment to Section 8.5. Section 8.5 of the Loan Agreement is hereby
amended and restated in its entirety to read as follows: 
 8.5 Loans and Investments. The Borrower will not make, and will not
permit any Subsidiary to make, any advance, loan, extension of credit, or capital contribution to or investment in, or purchase, or permit any Subsidiary to purchase, any stock, bonds, notes, debentures, or other securities of, any Person, except:

 (a) Readily marketable direct obligations of the United States of America or any agency thereof with maturities of one year or less from
the date of acquisition; 
 (b) Fully insured certificates of deposit with maturities of one year or less from the date of acquisition
issued by (i) the Lender or (ii) any commercial bank operating in the United States of America having capital and surplus in excess of $50,000,000; 

(c) Commercial paper of a domestic issuer if at the time of purchase such paper is rated in one of the two highest rating categories of
Standard and Poor’s Corporation, or Moody’s Investors Service; 
 (d) Investments in Subsidiaries in effect as of the Closing Date
and Investments made in connection with Permitted Acquisitions; 
 (e) Money market accounts substantially all of the assets of which are
invested in investments of the type described in clauses (a) through (c) above; 
 (f) loans and advances made to
the Borrower or to a Guarantor; and 
 (g) Extensions of trade credit in the ordinary course of business consistent with historical
practice. 

  
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AMENDMENT TO LOAN AGREEMENT – PAGE 13 

 2.9 Amendment to Section 8.7. Section 8.7 of the Loan Agreement is hereby
amended and restated in its entirety to read as follows: 
 8.7 Transactions With Affiliates. The Borrower will not enter into, and
will not permit any Subsidiary to enter into, any transaction, including, without limitation, the purchase, sale, or exchange of property or the rendering of any service, with any Affiliate of the Borrower or such Subsidiary, except
(a) transactions among Obligated Parties, (b) in the ordinary course of and pursuant to the reasonable requirements of the Borrower’s or such Subsidiary’s business and upon fair and reasonable terms no less favorable to the
Borrower or such Subsidiary than would be obtained in a comparable arm’s-length transaction with a Person not an Affiliate of the Borrower or such Subsidiary or (c) transactions permitted under
Section 8.5. 
 2.10 Amendment to Section 9.1. Section 9.1 of the Loan Agreement is hereby amended and
restated in its entirety to read as follows: 
 9.1 Fixed Charge Coverage Ratio. The Borrower shall not permit the Fixed Charge
Coverage Ratio, tested at the end of each fiscal quarter, to be less than 1.25 to 1.00. 
 2.11 Amendment to Section 9.2.
Section 9.2 of the Loan Agreement is hereby amended and restated in its entirety to read as follows: 
 9.2 Total Funded Debt
to EBITDAS Ratio. The Borrower shall not permit the Total Funded Debt to EBITDAS Ratio to be more than 3.0 to 1.00, tested at the end of each fiscal quarter. 

2.12 Deletion of Sections 9.3 and 9.4. Section 9.3 and Section 9.4 of the Loan Agreement are each deleted in
their entirety. 
 2.13 Release of Guaranty. The Guaranty of Brian Dick previously executed in favor of the Lender is hereby released
in its entirety and shall have no further effect. 

  
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AMENDMENT TO LOAN AGREEMENT – PAGE 14 

 ARTICLE III. 

Conditions Precedent 
 3.1
Effective Date. This Sixth Amendment shall become effective as of the date first above written when and only when Lender shall have received, at Lender’s office, (i) counterparts of this Sixth Amendment duly executed by Borrower,
(ii) counterparts of the Guaranty duly executed by each Guarantor, (iii) a counterpart of the Pledge Agreement duly executed by Earth 911, Inc., (iv) resolutions of the Board of Directors (or other governing body) of each Loan Party
certified by the Secretary or Assistant Secretary (or other custodian of records) of such Loan Party, which authorize the execution, delivery and performance of this Sixth Amendment and each of the other Loan Documents to which each Loan Party is or
is to be a party, and which certification include incumbency certificates demonstrating the authorized signatories for each Loan Party, (v) certificates of the appropriate government officials of the state of incorporation or organization of
each Loan Party, as to the existence and good standing of such Loan Party, (vi) copies of the articles of organization, bylaws or partnership agreement of each Loan Party, (vii) such other documents as Lender or its legal counsel may
reasonably request and (viii) all costs and expenses incident to the preparation hereof and the consummation of the transaction contemplated hereby, including, but not limited to, reasonable fees and expenses of Winstead PC, legal counsel to
Lender (which fees and expenses, as to legal counsel of Lender, shall be paid directly to Winstead PC immediately upon presentation of a bill for legal services rendered). 

ARTICLE IV. 
 Miscellaneous

 4.1 Acknowledgment. As modified herein, the terms and provisions of the Loan Agreement are ratified and confirmed and shall
remain in full force and effect, enforceable in accordance with their terms. Borrower hereby acknowledges, agrees and represents that (i) contemporaneously with the effectiveness of this Sixth Amendment, the representations and warranties of
Borrower contained in the Loan Agreement are true and correct representations and warranties, and (ii) Borrower has no set-offs, counterclaims, defenses or other causes of action against Lender arising
out of the Loan Agreement, this Sixth Amendment or otherwise, and to the extent any such set-offs, counterclaims, defenses or other causes of action may exist, whether known or unknown, such items are hereby
waived by Borrower. This Sixth Amendment is a “Loan Document” as referred to in the Loan Agreement. 
 4.2 CHOICE OF
LAW; VENUE. THIS SIXTH AMENDMENT SHALL BE GOVERNED BY THE LAWS OF THE STATE OF TEXAS. BORROWER HEREBY AGREES THAT THE OBLIGATIONS CONTAINED HEREIN ARE PERFORMABLE IN DALLAS COUNTY, TEXAS. ALL PARTIES HERETO AGREE THAT (I) ANY ACTION
ARISING OUT OF THIS TRANSACTION SHALL BE FILED IN DALLAS COUNTY, TEXAS, (II) VENUE FOR ENFORCEMENT OF ANY OF THE OBLIGATIONS CONTAINED IN THIS SIXTH AMENDMENT SHALL BE IN DALLAS COUNTY, (III) PERSONAL JURISDICTION SHALL BE IN
DALLAS COUNTY, TEXAS, (IV) ANY ACTION OR PROCEEDING UNDER THIS SIXTH AMENDMENT SHALL BE COMMENCED AGAINST BORROWER IN DALLAS COUNTY, (V) SUCH ACTION SHALL BE INSTITUTED IN THE COURTS OF THE STATE OF TEXAS LOCATED IN DALLAS
COUNTY, TEXAS OR IN THE UNITED STATES DISTRICT COURT FOR THE NORTHERN DISTRICT OF TEXAS LOCATED IN DALLAS COUNTY, TEXAS, AT THE OPTION OF LENDER AND (VI) BORROWER HEREBY WAIVES ANY OBJECTION TO THE VENUE OF ANY SUCH SUIT, ACTION OR
PROCEEDING AND ADDITIONALLY WAIVES ANY RIGHT IT MAY HAVE TO BE SUED ELSEWHERE. NOTHING HEREIN SHALL AFFECT THE RIGHT OF LENDER TO ACCOMPLISH SERVICE OF PROCESS IN ANY MANNER PERMITTED BY LAW. 

  
 SIXTH
AMENDMENT TO LOAN AGREEMENT – PAGE 15 

 4.3 WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO WAIVES, TO THE MAXIMUM
EXTENT PERMITTED BY APPLICABLE LAW, ITS RESPECTIVE RIGHTS TO A TRIAL BY JURY OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF OR RELATED TO THIS SIXTH AMENDMENT, THE LOAN AGREEMENT, THE OTHER LOAN DOCUMENTS OR THE TRANSACTIONS
CONTEMPLATED HEREBY OR THEREBY IN ANY ACTION, PROCEEDING OR OTHER LITIGATION OF ANY TYPE BROUGHT BY ANY OF THE PARTIES AGAINST ANY OTHER PARTY, WHETHER WITH RESPECT TO CONTRACT CLAIMS, TORT CLAIMS, OR OTHERWISE. EACH OF THE PARTIES HERETO AGREES
THAT ANY SUCH CLAIM OR CAUSE OF ACTION SHALL BE TRIED BY A COURT TRIAL WITHOUT A JURY. WITHOUT LIMITING THE FOREGOING, THE PARTIES FURTHER AGREE THAT THEIR RESPECTIVE RIGHT TO A TRIAL BY JURY IS WAIVED BY OPERATION OF THIS SECTION AS TO ANY ACTION,
COUNTERCLAIM OR OTHER PROCEEDING WHICH SEEKS, IN WHOLE OR IN PART, TO CHALLENGE THE VALIDITY OR ENFORCEABILITY OF THIS SIXTH AMENDMENT, THE LOAN AGREEMENT OR ANY OTHER LOAN DOCUMENT OR ANY PROVISION HEREOF OR THEREOF. THIS WAIVER SHALL APPLY TO ANY
SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT AND ANY OTHER LOAN DOCUMENTS. 
 4.4 Time. Time is
of the essence in the performance of the covenants contained herein and in the Loan Documents. 
 4.5 Binding Agreement. This Sixth
Amendment shall be binding upon the heirs, executors, administrators, personal representatives, successors and assigns of the parties hereto; provided, however, the foregoing shall not be deemed or construed to (i) permit, sanction, authorize
or condone the assignment of all or any part of any interest in and to Borrower except as expressly authorized in the Loan Documents, or (ii) confer any right, title, benefit, cause of action or remedy upon any person or entity not a party
hereto, which such party would not or did not otherwise possess. 
 4.6 Headings. The section headings hereof are inserted for
convenience of reference only and shall in no way alter, amend, define or be used in the construction or interpretation of the text of such section. 

4.7 Construction. Whenever the context hereof so required, reference to the singular shall include the plural and likewise, the plural
shall include the singular; words denoting gender shall be construed to mean the masculine, feminine or neuter, as appropriate; and specific enumeration shall not exclude the general but shall be construed as cumulative of the general recitation.

 4.8 Counterparts; Fax. This Sixth Amendment may be separately executed in counterparts and by the different parties hereto in
separate counterparts, each of which when so executed shall be deemed to constitute one and the same Sixth Amendment. This Sixth Amendment may be duly executed by facsimile or other electronic transmissions. 

  
 SIXTH
AMENDMENT TO LOAN AGREEMENT – PAGE 16 

 4.9 No Reliance. In executing this Sixth Amendment, Borrower warrants and represents that
Borrower is not relying on any statement or representation other than those in this Agreement and is relying upon its own judgment and advice of its attorneys. 

THIS SIXTH AMENDMENT, THE LOAN AGREEMENT AND THE LOAN DOCUMENTS COLLECTIVELY REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. 

[Signature Pages Follow] 

  
 SIXTH
AMENDMENT TO LOAN AGREEMENT – PAGE 17 

 IN WITNESS WHEREOF, this Sixth Amendment is executed effective as of the date first above
written. 
  

			
	BORROWER:
	
	 QUEST RESOURCE MANAGEMENT

GROUP, LLC,

	a Delaware limited liability company
		
	By:	 	/s/ Laurie L. Latham
		 	Name: Laurie L. Latham
		 	Title: CFO

 SIXTH AMENDMENT TO LOAN AGREEMENT –
SIGNATURE PAGE 

 
			
	LENDER:
	
	 REGIONS BANK

		
	By:	 	/s/ Catherine M. Young
		 	Name: Catherine M. Young
		 	Title: SVP

 SIXTH AMENDMENT TO LOAN AGREEMENT –
SIGNATURE PAGEEX-10.19(b)

 Exhibit 10.19(b) 

GUARANTY 
 THIS
GUARANTY (this “Guaranty”) is executed as of May 9, 2014, by each of the undersigned entities, and their respective successors and permitted assigns (each, a “Guarantor” and collectively, the
“Guarantor”), whose addresses for notice purposes are set forth on the signature page hereto, for the benefit of REGIONS BANK (“the Lender”), and its Affiliates (the Lender and its Affiliates, together with their
successors and assigns, herein sometimes collectively called “Beneficiaries”). Unless otherwise defined herein, all capitalized terms have the meanings given to such terms in the Loan Agreement (as defined herein). 

INTRODUCTORY PROVISIONS: 

A. Quest Resource Management Group, LLC, a Delaware limited liability company (formerly known as Quest Recycling Services, LLC)
(“Quest” or “Borrower”) and the Lender have previously executed a Loan Agreement. 
 B. It is expressly
understood among Quest, each Guarantor, and the Lender that the execution and delivery of this Guaranty is a condition precedent to the Lender’s continued obligation to make loans or extend credit under the Loan Agreement and is an integral
part of the transactions contemplated thereby. 
 C. Each Guarantor is an Affiliate of Quest and the extension of credit to Quest is a
substantial and direct benefit to each Guarantor. 
 NOW, THEREFORE, for valuable consideration, the receipt and adequacy of which are
hereby acknowledged, each Guarantor hereby guarantees to Beneficiaries the prompt payment and performance of the Guaranteed Obligations, this Guaranty being upon the following terms and conditions: 

Section 1 DEFINITIONS. As used in this Guaranty, the following terms have the following meanings:

 Applicable Law: As to any Guarantor, each statute, law, ordinance, regulation, order, judgment, injunction or decree of the United
States or any state or commonwealth, any municipality, any foreign country, or any territory, possession or tribunal applicable to the Guarantor. 

Borrower: Quest, and without limitation, its successors and assigns (regardless of whether such successor or assign is formed by or
results from any merger, consolidation, conversion, sale or transfer of assets, reorganization, or otherwise) including Borrower as a debtor-in-possession, and any receiver, trustee, liquidator, conservator, custodian, or similar party hereafter
appointed for Borrower or all or substantially all of its assets pursuant to any liquidation, conservatorship, bankruptcy, moratorium, rearrangement, receivership, insolvency, reorganization, or similar Debtor Relief Laws (hereinafter defined) from
time to time in effect. 
 GUARANTY– Page 1 

 Debtor Relief Laws: Title 11 of the United States Code, as now or hereafter in effect, or
any other Applicable Law, domestic or foreign, as now or hereafter in effect, relating to bankruptcy, insolvency, liquidation, receivership, reorganization, arrangement or composition, extension or adjustment of debts, or similar laws affecting the
rights of creditors. 
 Dispute: Any action, dispute, claim or controversy of any kind, whether in contract or tort, statutory or
common law, legal or equitable, now existing or hereafter arising under or in connection with, or in any way pertaining to, this Guaranty and each other document, contract and instrument required hereby or now or hereafter delivered to the Lender in
connection herewith, or any past, present or future extensions of credit and other activities, transactions or obligations of any kind related directly or indirectly to any of the foregoing documents, including without limitation, any of the
foregoing arising in connection with the exercise of any self-help, ancillary or other remedies pursuant to any of the foregoing documents. 

Obligations: All obligations, indebtedness, and liabilities of Borrower, each Guarantor and any other Obligated Party to the Lender or
Affiliates of the Lender, or both, now existing or hereafter arising, whether direct, indirect, related, unrelated, fixed, contingent, liquidated, unliquidated, joint, several, or joint and several, which relate to the obligations, indebtedness, and
liabilities under this Agreement, the Loan Agreement, any Swap Contract, the other Loan Documents (as defined in the Loan Agreement), any cash management or treasury services agreements and all interest accruing thereon (whether a claim for
post-filing or post-petition interest is allowed in any insolvency, reorganization or similar proceeding) and all attorneys’ fees and other expenses incurred in the enforcement or collection thereof. 

Guaranteed Obligations: The Obligations and the Guaranteed Performance Obligations. 

Guaranteed Performance Obligations: All of the obligations of Borrower and each Guarantor under the Loan Documents other than an
obligation to pay money. 
 Loan Agreement: That certain Loan Agreement dated as of December 15, 2010, by and between Quest and
Lender, as renewed, extended, restated, amended, supplemented, waived or replaced from time to time. 

  
 - 2 - 

 Section 2 PAYMENT. Each Guarantor hereby
unconditionally and irrevocably guarantees to Beneficiaries the punctual payment when due, whether by lapse of time, by acceleration of maturity, or otherwise, and at all times thereafter, of the Guaranteed Obligations. This Guaranty covers the
Guaranteed Obligations, whether presently outstanding or arising subsequent to the date hereof, including all amounts advanced by any Beneficiary in stages or installments. The guaranty of each Guarantor as set forth in this Section 2 is
a continuing guaranty of payment and not a guaranty of collection. Each Guarantor acknowledges and agrees that each Guarantor may be required to pay and perform the Guaranteed Obligations in full without assistance or support from Borrower or any
other party. Each Guarantor agrees that if all or any part of the Guaranteed Obligations shall not be punctually paid when due, whether on the scheduled payment date, by lapse of time, by acceleration of maturity or otherwise, each Guarantor shall,
immediately upon demand by a Beneficiary, pay the amount due on the Guaranteed Obligations to such Beneficiary at Beneficiary’s address as set forth herein. Such demand(s) may be made at any time coincident with or after the time for payment of
all or part of the Guaranteed Obligations, and may be made from time to time with respect to the same or different items of Guaranteed Obligations. Such demand shall be made, given and received in accordance with the notice provisions hereof. 

Section 3 PERFORMANCE. Each Guarantor hereby unconditionally and irrevocably guarantees to
Beneficiaries the timely performance of the Guaranteed Performance Obligations. If any of the Guaranteed Performance Obligations of Borrower are not satisfied or complied with in any respect whatsoever, and without the necessity of any notice from a
Beneficiary to any Guarantor, each Guarantor agrees to indemnify and hold Beneficiaries harmless from any and all loss, cost, liability or expense that Beneficiaries may suffer by any reason of any such non-performance or non-compliance, other than
those matters expressly caused by the gross negligence or willful misconduct of any of the Beneficiaries. The obligations and liability of each Guarantor under this Section 3 shall not be limited or restricted by the existence of, or any
terms of, the guaranty of payment under Section 2 of this Guaranty. 
 Section 4 PRIMARY
LIABILITY OF EACH GUARANTOR. 
 (a) This
Guaranty is an absolute, irrevocable and unconditional guaranty of payment and performance. Each Guarantor is and shall be jointly and severally liable for the payment and performance of the Guaranteed Obligations, as set forth in this Guaranty, as
a primary obligor. 
 (b) In the event of default in payment or performance of the Guaranteed Obligations, or any part
thereof, when such Guaranteed Obligations become due, whether by its terms, by acceleration, or otherwise, each Guarantor shall promptly pay the amount due thereon to Beneficiaries without notice or demand, of any kind or nature, in lawful money of
the United States of America or perform the obligations to be performed hereunder, and it shall not be necessary for any Beneficiary in order to enforce such payment and performance by each Guarantor first, or contemporaneously, to institute suit or
exhaust remedies against Borrower or others liable on the Guaranteed Obligations, including any other guarantor, or to enforce any rights, remedies, powers, privileges or benefits of any Beneficiary against any Collateral, or any other security or
collateral which shall ever have been given to secure the Guaranteed Obligations. 
 (c) Suit may be brought or demand may be
made against all parties who have signed this Guaranty or any other guaranty in favor of Beneficiaries covering all or any part of the Guaranteed Obligations, or against any one or more of them, separately or together, without impairing the rights
of any Beneficiary against any party hereto. Any time that a Beneficiary is entitled to exercise its rights or remedies hereunder, such Beneficiary may in its discretion elect to demand payment and/or performance. If a Beneficiary elects to demand
performance, it shall at all times thereafter have the right to demand payment until all of the Guaranteed Obligations have been paid and performed in full. If a Beneficiary elects to demand payment, it shall at all times thereafter have the right
to demand performance until all of the Guaranteed Obligations have been paid and performed in full. 

  
 - 3 - 

 (d) Notwithstanding any provision of this Guaranty or any other Loan Document, no
Guarantor hereunder shall be deemed to be a guarantor of any Obligations that arise pursuant to a Swap Contract if such Guarantor is not an “Eligible Contract Participant” as defined in § 1(a)(18) of the Commodity Exchange Act and the
applicable rules issued by the Commodity Futures Trading Commission and/or the Securities and Exchange Commission (collectively, and as now or hereafter in effect, the “ECP Rules”) to the extent that the providing of such guaranty
by such Guarantor would violate the ECP Rules or any other applicable Law or regulation. This Section 4(d) shall not affect any Guaranteed Obligations of such Guarantor other than Obligations that arise pursuant to a Swap Contract, nor
shall it affect the Guaranteed Obligations of any Guarantor who qualifies as an “Eligible Contract Participant”. 
 Section 5
OTHER GUARANTEED DEBT. If any Guarantor becomes liable for any indebtedness owing by Borrower to Beneficiaries, or any or some of them, by endorsement or otherwise, other than under
this Guaranty, such liability shall not be in any manner impaired or affected hereby, and the rights and remedies hereunder shall be cumulative of any and all other rights and remedies that Beneficiaries may ever have against any Guarantor. The
exercise by Beneficiary of any right or remedy hereunder or under any other instrument, or at law or in equity, shall not preclude the concurrent or subsequent exercise of any other right or remedy by such Beneficiary or any other Beneficiary. 

Section 6 SUBROGATION. Until the Guaranteed Obligations have been paid, in full, each Guarantor
hereby covenants and agrees that it shall not assert, enforce, or otherwise exercise (a) any right of subrogation to any of the rights, remedies or Liens of Beneficiaries or any other beneficiary against Borrower or its Affiliates or any other
guarantor of the Guaranteed Obligations or any collateral or other security, or (b) unless such rights are expressly made subordinate to the Guaranteed Obligations (in form and upon terms acceptable to the Lender) and the rights or remedies of
Beneficiaries under this Guaranty and the Loan Documents, any right of recourse, reimbursement, contribution, indemnification, or similar right against Borrower or its Affiliates or any other guarantor of all or any part of the Guaranteed
Obligations. 
 Section 7 SUBORDINATED DEBT. All principal of and interest on all
indebtedness, liabilities, and obligations of Borrower or its Affiliates to each Guarantor (the “Subordinated Debt”) now or hereafter existing, due or to become due to each Guarantor, or held or to be held by any Guarantor, whether
created directly or acquired by assignment or otherwise, and whether evidenced by written instrument or not, shall be expressly subordinated to the Guaranteed Obligations. Until such time as the Guaranteed Obligations are paid and performed in full
and all commitments to lend under the Loan Documents have terminated, each Guarantor agrees not to receive or accept any payment from Borrower with respect to the Subordinated Debt at any time an Event of Default has occurred and is continuing; and,
in the event any Guarantor receives any payment on the Subordinated Debt in violation of the foregoing, such Guarantor will hold any such payment in trust for Beneficiaries and forthwith turn it over to Beneficiaries in the form received, to be
applied to the Guaranteed Obligations. 

  
 - 4 - 

 Section 8 OBLIGATIONS NOT TO
BE DIMINISHED. Each Guarantor hereby agrees that its obligations under this Guaranty shall not be released, discharged, diminished, impaired, reduced, or affected for any reason or by the occurrence
of any event, including, without limitation, one or more of the following events, whether or not with notice to or the consent of each Guarantor: (a) the taking or accepting of collateral as security for any or all of the Guaranteed Obligations
or the release, surrender, exchange, or subordination of any collateral now or hereafter securing any or all of the Guaranteed Obligations; (b) any partial release of the liability of Borrower, any other Guarantor, or the full or partial
release of any other guarantor or obligor from liability for any or all of the Guaranteed Obligations; (c) any disability of Borrower, or the dissolution, insolvency, or bankruptcy of Borrower, any Guarantor or any other guarantor, or any other
party at any time liable for the payment of any or all of the Guaranteed Obligations; (d) any renewal, extension, modification, waiver, amendment, or rearrangement of any or all of the Guaranteed Obligations or any instrument, document, or
agreement evidencing, securing, or otherwise relating to any or all of the Guaranteed Obligations; (e) any adjustment, indulgence, forbearance, waiver, or compromise that may be granted or given by any Beneficiary to Borrower, any Guarantor,
any other guarantor or any other party ever liable for any or all of the Guaranteed Obligations; (f) any neglect, delay, omission, failure, or refusal of any Beneficiary to take or prosecute any action for the collection of any of the
Guaranteed Obligations or to foreclose or take or prosecute any action in connection with any instrument, document, or agreement evidencing, securing, or otherwise relating to any or all of the Guaranteed Obligations; (g) the unenforceability
or invalidity of any or all of the Guaranteed Obligations or of any instrument, document, or agreement evidencing, securing, or otherwise relating to any or all of the Guaranteed Obligations; (h) any payment by Borrower or any other party to
any Beneficiary is held to constitute a preference under applicable bankruptcy or insolvency law or if for any other reason any Beneficiary is required to refund any payment or pay the amount thereof to someone else; (i) the settlement or
compromise of any portion of the Guaranteed Obligations; (j) the non-perfection of any security interest or Lien securing any or all of the Guaranteed Obligations; (k) any impairment of any collateral securing any or all of the Guaranteed
Obligations; (l) the failure of any Beneficiary to sell any collateral securing any or all of the Guaranteed Obligations in a commercially reasonable manner or as otherwise required by law; (m) any change in the corporate existence,
structure, or ownership of Borrower; or (n) any other circumstance which might otherwise constitute a defense available to, or discharge of, Borrower or any Guarantor other than payment. 

  
 - 5 - 

 Section 9 WAIVERS. Each Guarantor waives (a) any
right to revoke this Guaranty with respect to future indebtedness; (b) any right to require any Beneficiary to do any of the following before any Guarantor is obligated to pay the Guaranteed Obligations or before any Beneficiary may proceed
against any Guarantor: (i) sue or exhaust remedies against Borrower and other guarantors or obligors, (ii) sue on an accrued right of action in respect of any of the Guaranteed Obligations or bring any other action, exercise any other
right, or exhaust all other remedies, or (iii) enforce rights against Borrower’s assets or the collateral pledged by Borrower to secure the Guaranteed Obligations; (c) any right relating to the timing, manner, or conduct of such
Beneficiary’s enforcement of rights against Borrower’s assets or the collateral pledged by Borrower to secure the Guaranteed Obligations; (d) if any Guarantor and Borrower (or a third-party) have each pledged assets to secure the
Guaranteed Obligations, any right to require any Beneficiary to proceed first against the other collateral before proceeding against collateral pledged by any Guarantor; (e) except as expressly required hereby or by any Applicable Law,
promptness, diligence, notice of any default under the Guaranteed Obligations, notice of acceleration or intent to accelerate, demand for payment, notice of acceptance of this Guaranty, presentment, notice of protest, notice of dishonor, notice of
the incurring by Borrower of additional indebtedness, notice of any suit or other action by any Beneficiary against Borrower or any other Person, any notice to any party liable for the obligation which is the subject of the suit or action, and all
other notices and demands with respect to the Guaranteed Obligations and this Guaranty; (f) each of the foregoing rights or defenses regardless whether they arise under (i) Section 34.01 et seq. of the Texas Business and Commerce
Code, as amended, (ii) Section 17.001 of the Texas Civil Practice and Remedies Code, as amended, (iii) Rule 31 of the Texas Rules of Civil Procedure, as amended, (iv) common law, in equity, under contract, by statute, or
otherwise; and (g) any and all rights under Sections 51.003, 51.004 and 51.005 of the Texas Property Code, as amended. 

Section 10 INSOLVENCY. Should any Guarantor become insolvent, or fail to pay such Guarantor’s
debts generally as they become due, or voluntarily seek, consent to, or acquiesce in the benefit or benefits of any Debtor Relief Law, or become a party to (or be made the subject of) any proceeding provided for by any Debtor Relief Law (other than
as a creditor or claimant) that could suspend or otherwise adversely affect the rights and remedies of Beneficiaries granted hereunder, then, in any such event, the Guaranteed Obligations shall be, as between such Guarantor and Beneficiaries, a
fully matured, due, and payable obligation of such Guarantor to Beneficiaries (without regard to whether Borrower is then in default under the Loan Agreement or whether the Guaranteed Obligations, or any part thereof is then due and owing by
Borrower to Beneficiaries), payable in full by such Guarantor to Beneficiaries upon demand, which shall be the estimated amount owing in respect of the contingent claim created hereunder. 

Section 11 TERMINATION. Each Guarantor’s obligations hereunder shall remain in full force and
effect until all commitments to lend under the Loan Documents have terminated, and the Guaranteed Obligations have been paid in full. If at any time any payment of the principal of or interest or any other amount payable by Borrower under the Loan
Documents is rescinded or must be otherwise restored or returned upon the insolvency, bankruptcy, or reorganization of Borrower or otherwise, each Guarantor’s obligations hereunder with respect to such payment shall be reinstated as though such
payment had been due but not made at such time. 
 Section 12 REPRESENTATIONS AND
WARRANTIES. Each Guarantor represents and warrants as follows (each as to themselves only): 

(a) Guarantor has the power and authority and legal right to execute, deliver, and perform its obligations under this Guaranty
and this Guaranty constitutes the legal, valid, and binding obligation of Guarantor, enforceable against Guarantor in accordance with its terms, except as limited by Debtor Relief Laws or other laws of general application relating to the enforcement
of creditor’s rights. 

  
 - 6 - 

 (b) The execution, delivery, and performance by Guarantor of this Guaranty do not
and will not violate or conflict with any law, rule, or regulation or any order, writ, injunction, or decree of any court, Governmental Authority or agency, or arbitrator and do not and will not conflict with, result in a breach of, or constitute a
default under, or result in the imposition of any Lien (as defined in the Loan Agreement) upon any assets of Guarantor pursuant to the provisions of any indenture, mortgage, deed of trust, security agreement, franchise, permit, license, or other
instrument or agreement to which Guarantor or its properties are bound. 
 (c) No authorization, approval, or consent of, and
no filing or registration with, any court, Governmental Authority, or third party is necessary for the execution, delivery, or performance by any Guarantor of this Guaranty or the validity or enforceability thereof that has not been obtained. 

(d) Guarantor has, independently and without reliance upon any Beneficiary and based upon such documents and information as
Guarantor has deemed appropriate, made its own analysis and decision to enter into this Guaranty, and Guarantor has adequate means to obtain from Borrower on a continuing basis information concerning the financial condition and assets of Borrower,
and Guarantor is not relying upon any Beneficiary to provide (and no Beneficiary shall have duty to provide) any such information to Guarantor either now or in the future. 

Section 13 MUTUAL BENEFIT. The value of the consideration received and to be received
by each Guarantor is reasonably worth at least as much as the liability and obligation of each Guarantor hereunder, and such liability and obligation may reasonably be expected to benefit each Guarantor directly or indirectly. 

Section 14 COVENANTS. To the extent not already required by the Loan Agreement, so long as this
Guaranty remains in full force and effect, each Guarantor shall, unless Beneficiaries shall otherwise consent in writing: 

(a) Furnish to Beneficiaries written notice of the occurrence of any Default (as defined in the Loan Agreement) promptly upon
obtaining knowledge thereof. 
 (b) Furnish to Beneficiaries such additional information concerning any Guarantor, Borrower
or any other Person under the control of any Guarantor as Beneficiaries may reasonably request. 
 (c) Obtain at any time and
from time to time all authorizations, licenses, consents or approvals as shall now or hereafter be necessary or desirable under all Applicable Laws or regulations or otherwise in connection with the execution, delivery and performance of this
Guaranty and will promptly furnish copies thereof to Beneficiaries. 

  
 - 7 - 

 Section 15 REPORTING REQUIREMENTS. To
the extent not already required by the Loan Agreement, so long as this Guaranty remains in full force and effect, each applicable Guarantor shall, unless Beneficiaries shall otherwise consent in writing: 

(a) Furnish to Beneficiaries as soon as available, and in any event within one hundred twenty (120) days after the end of
each fiscal year of Quest Resource Holding Corporation, a copy of the annual audited report of Quest Resource Holding Corporation and its Subsidiaries for such fiscal year containing, on a consolidated basis, balance sheets and statements of income,
retained earnings, and cash flow as at the end of such fiscal year and for the annual period then ended, in each case setting forth in comparative form the figures for the preceding fiscal year, all in reasonable detail and certified by independent
certified public accountants of recognized standing acceptable to the Lender, to have been prepared in accordance with GAAP and containing no material qualifications or limitations on scope and to fairly and accurately present (subject to year-end
audit adjustments) the financial condition and results of operations of Quest Resource Holding Corporation and its Subsidiaries, on a consolidated basis, at the date and for the periods indicated therein. 

(b) Furnish to Beneficiaries as soon as available, and in any event within forty five (45) days after the end of each
calendar quarter, a copy of an unaudited financial report of Quest Resources Holding Corporation and its Subsidiaries as of the end of such calendar quarter and for the portion of the fiscal year then ended, containing, on a consolidated basis,
balance sheets and statements of income, and retained earnings, all in reasonable detail certified by the chief financial officer, treasurer or comparable officer of Quest Resources Holding Corporation to have been prepared in accordance with GAAP
and to fairly and accurately present (subject to year-end audit adjustments) the financial condition and results of operations of such entities, on a consolidated basis, at the date and for the periods indicated therein. 

Section 16 NO FRAUDULENT TRANSFER. It is the intention of each
Guarantor and Beneficiaries that the amount of the Guaranteed Obligations guaranteed by each Guarantor by this Guaranty shall be in, but not in excess of, the maximum amount permitted by fraudulent conveyance, fraudulent transfer, or similar laws
applicable to each Guarantor. Accordingly, notwithstanding anything to the contrary contained in this Guaranty or any other agreement or instrument executed in connection with the payment of any of the Guaranteed Obligations, the amount of the
Guaranteed Obligations guaranteed by each Guarantor by this Guaranty shall be limited to that amount which after giving effect thereto would not (a) render any Guarantor insolvent, (b) result in the fair saleable value of the assets of any
Guarantor being less than the amount required to pay its debts and other liabilities (including contingent liabilities) as they mature, or (c) leave any Guarantor with unreasonably small capital to carry out its business as now conducted and as
proposed to be conducted, including its capital needs, as such concepts described in clauses (a), (b) and (c) of this Section 16, are determined under Applicable Law, if the obligations of any Guarantor hereunder would
otherwise be set aside, terminated, annulled or avoided for such reason by a court of competent jurisdiction in a proceeding actually pending before such court. 

  
 - 8 - 

 Section 17 SUCCESSORS AND
ASSIGNS. This Guaranty is for the benefit of Beneficiaries and their successors and assigns, and, in the event of an assignment of the Guaranteed Obligations in accordance with the provisions of the Loan Agreement,
or any part thereof, the rights and remedies hereunder, to the extent applicable to the indebtedness so assigned, may be transferred with such indebtedness. This Guaranty is binding on each Guarantor, and its successors and permitted assigns;
provided that, no Guarantor may assign its obligations under this Guaranty without obtaining the prior written consent of the Lender, and any assignment purported to be made without the prior written consent of the Lender shall be null
and void. 
 Section 18 LOAN AGREEMENT. The Loan Agreement, and all of the terms
thereof, is incorporated herein by reference, the same as if stated verbatim herein, and each Guarantor agrees that Beneficiaries may exercise any and all rights granted to it under the Loan Agreement and the other Loan Documents without affecting
the validity or enforceability of this Guaranty. 
 Section 19 AMENDMENTS. No amendment or waiver
of any provision herein nor consent to any departure therefrom by each Guarantor shall be effective unless the same shall be in writing and signed by Beneficiaries, and then, such amendment, waiver, or consent shall be effective only in the specific
instance and for the specific purpose for which given. 
 Section 20 SETOFF RIGHTS.
Beneficiaries shall have the right to set off and apply against this Guaranty or the Guaranteed Obligations or both, at any time and without notice to any Guarantor, any and all deposits (general or special, time or demand, provisional or final) or
other sums at any time credited by or owing from any Beneficiary to any Guarantor whether or not the Guaranteed Obligations are then due and irrespective of whether or not such Beneficiary shall have made any demand under this Guaranty. As security
for this Guaranty and the Guaranteed Obligations, each Guarantor hereby grants Beneficiaries a security interest in all money, instruments, certificates of deposit, and other property of each Guarantor now or hereafter held by Beneficiaries,
including, without limitation, property held in safekeeping. In addition to Beneficiaries’ right of setoff and as further security for this Guaranty and the Guaranteed Obligations, each Guarantor hereby grants Beneficiaries a security interest
in all deposits (general or special, time or demand, provisional or final) and all other accounts of each Guarantor now or hereafter on deposit with or held by Beneficiaries or any or some of them and all other sums at any time credited by or owing
from each Beneficiary to each Guarantor. The rights and remedies of Beneficiaries hereunder are in addition to other rights and remedies (including, without limitation, other rights of setoff) which Beneficiaries may have. 

Section 21 TIME OF ESSENCE. Time shall be of the essence in this
Guaranty with respect to each Guarantor’s obligations hereunder. 
 Section 22 GOVERNING LAW;
VENUE; SERVICE OF PROCESS. This Agreement shall be governed by and construed in accordance with the laws of the State of Texas and the Applicable Laws of the United
States of America. This Agreement has been entered into in Dallas County, Texas, and it shall be performable for all purposes in Dallas County, Texas. Any action or proceeding against Borrower or any Guarantor under or in connection with any of the
Loan Documents may be brought in any state or federal court in Dallas County, Texas. Each of Borrower and Guarantor hereby irrevocably (a) submits to the nonexclusive jurisdiction of such courts, and (b) waives any objection it may now or
hereafter have as to the venue of any such action or proceeding brought in any such court or that any such court is an inconvenient forum. Borrower and each Guarantor agree that service of process upon it may be made by certified or registered mail,
return receipt requested, at its address specified or determined in accordance with the provisions of the Loan Agreement. Nothing herein or in any of the other Loan Documents shall affect the right of the Lender to serve process in any other manner
permitted by law or shall limit the right of the Lender to bring any action or proceeding against Borrower or any Guarantor or with respect to any of its Property in courts in other jurisdictions. Any action or proceeding by Borrower or any
Guarantor against the Lender shall be brought only in a court located in Dallas County, Texas. 

  
 - 9 - 

 Section 23 COUNTERPARTS. This Guaranty may be executed
in multiple counterparts, each of which, for all purposes, shall be deemed an original (including electronic copies), and all of which taken together shall constitute but one and the same instrument. 

Section 24 WAIVER OF RIGHT TO TRIAL
BY JURY. EACH GUARANTOR HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, SUIT, PROCEEDING, OR COUNTERCLAIM THAT RELATES TO OR ARISES OUT OF THIS
GUARANTY OR ANY OF THE LOAN DOCUMENTS OR THE ACTS OR FAILURE TO ACT OF OR BY ANY BENEFICIARY IN THE ENFORCEMENT OF ANY OF THE TERMS OR PROVISIONS OF THIS GUARANTY OR THE OTHER LOAN DOCUMENTS. 

Section 25 NO ORAL AGREEMENTS. THIS GUARANTY REPRESENTS THE FINAL
AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS BY THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. 

Section 26 THE LENDER ACTS FOR
BENEFICIARIES. The Lender shall (absent written notification by a Beneficiary to the contrary) act for all Beneficiaries for the purposes of making demands hereunder, obtaining information, amending or waiving
provisions hereof and otherwise taking action on behalf of the Beneficiaries, and (absent written notice to the contrary) each Guarantor shall be entitled to rely on the authority of the Lender to act for all Beneficiaries without further
investigation. 
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Signature page to follow. 

  
 - 10 - 

 EXECUTED as of the date first above written. 

 

			
	GUARANTOR:
	
	QUEST RESOURCE HOLDING CORPORATION, a Nevada corporation
		
	By:	 	 /s/ Laurie L. Latham

		 	Name: Laurie L. Latham
		 	Title: CFO
	
	Address for Notices:
	
	6175 Main Street, Suite 420
	Frisco, Texas 75034
	Attn: Laurie L. Latham
	
	with a copy to:
	
	Greenberg Traurig, LLP
	2375 E. Camelback Road, Suite 700
	Phoenix, Arizona 85016
	Attn: Robert S. Kant

 Signature Page to Guaranty 

 
			
	EARTH911, INC.,
	a Delaware corporation
		
	By:	 	 /s/ Laurie L. Latham

		 	Name: Laurie L. Latham
		 	Title: CFO
	
	Address for Notices:
	
	6175 Main Street, Suite 420
	Frisco, Texas 75034
	Attn: Laurie L. Latham
	
	with a copy to:
	
	Greenberg Traurig, LLP
	2375 E. Camelback Road, Suite 700
	Phoenix, Arizona 85016
	Attn: Robert B. Kant

  
 Signature Page to
Guaranty

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