Document:

EX-4.2

 Exhibit 4.2 

NEITHER THIS SECURITY NOR THE SECURITIES FOR WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE
SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED
BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY. 

COMMON STOCK PURCHASE WARRANT 

ECM ENERGY SERVICES, INC. 
  

			
	Warrant Number: B-            	 	Issue Date:             , 20    1

 THIS COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received,
                     (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions
hereinafter set forth, at any time on or after the “Initial Exercise Date” (which is the Issue Date) and on or prior to the close of business on the fifth (5th) anniversary
of the Initial Exercise Date (the “Termination Date”) but not thereafter, to subscribe for and purchase from ECM Energy Services, Inc., a Delaware corporation (the “Company”), up to
                2 shares (the “Warrant Shares”) of Common Stock. The purchase price of one
share of Common Stock under this Warrant shall be equal to the Exercise Price, as defined in Section 2(b). 

Section 1. Definitions. 

a) “Business Day” means any day other than (a) a Saturday or Sunday and (b) any day on which banks
are required or permitted to be closed in New York, New York. 
 b) “Commission” means the United States
Securities and Exchange Commission. 
 c) “Common Stock” means the common stock of the Company, par value
$0.001 per share, and any other class of securities into which such securities may hereafter be reclassified or changed. 

d) “Person” means an individual or corporation, partnership, trust, incorporated or unincorporated
association, joint venture, limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind. 

e) “Registration Statement” means a registration statement covering the resale by the Holder of the Warrant
Shares. 
  
  

	1 	Initial Exercise Date shall be on the closing of the IPO. 

	2 	Warrant Shares to equal 25% of Principal Amount of Bridge Note divided by price per share in IPO. 

  
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 f) “Rule 144” means Rule 144 promulgated by the Commission
pursuant to the Securities Act, as such Rule may be amended from time to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule. 

g) “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated
thereunder. 
 h) “Trading Day” means a day on which the principal Trading Market is open for trading. 

i) “Trading Market” means any of the following markets or exchanges on which the Common Stock is listed or
quoted for trading on the date in question: the NYSE MKT, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, the New York Stock Exchange, the OTC Bulletin Board or the Pink Sheets (or any successors to any of the
foregoing). 
 j) “VWAP” means, for any date, the price determined by the first of the following clauses
that applies: (a) if the Common Stock is then listed or quoted on a Trading Market, the daily volume weighted average price of the Common Stock for such date (or the nearest preceding date) on the Trading Market on which the Common Stock is
then listed or quoted as reported by Bloomberg L.P. (based on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), or (b) in all other cases, the fair market value of a share of Common Stock as determined by an
independent appraiser selected in good faith by the Company, the fees and expenses of which shall be paid by the Company. 

Section 2. Exercise. 

a) Exercise of Warrant. Exercise of the purchase rights represented by this Warrant may be made, in whole or in part, at
any time or times on or after the Initial Exercise Date and on or before the Termination Date by delivery to the Company (or such other office or agency of the Company as it may designate by notice in writing to the registered Holder at the address
of the Holder appearing on the books of the Company) of a duly executed facsimile copy of the Notice of Exercise Form annexed hereto; and, within three (3) Trading Days of the date said Notice of Exercise is delivered to the Company, the
Company shall have received payment of the aggregate Exercise Price of the shares thereby purchased by wire transfer or cashier’s check drawn on a United States bank or, if available, pursuant to the cashless exercise procedure specified in
Section 2(c) below. Notwithstanding anything herein to the contrary, the Holder shall not be required to physically surrender this Warrant to the Company until the Holder has purchased all of the Warrant Shares available hereunder and the
Warrant has been exercised in full, in which case, the Holder shall surrender this Warrant to the Company for cancellation within three (3) Trading Days of the date the final Notice of Exercise is delivered to the Company, failure, however, to
deliver such certificate shall not affect the rights of the Holder herein to, among other things, exercise this Warrant and receive the Warrant Shares in accordance with this Warrant. Partial exercises of this Warrant resulting in purchases of a
portion of the total number of Warrant Shares available hereunder shall have the effect of lowering the outstanding number of Warrant Shares purchasable hereunder in an amount equal to the applicable number of Warrant Shares purchased. The Holder
and the Company shall maintain records showing the number of Warrant Shares purchased and the date of such purchases. The Company shall deliver any objection to any Notice of Exercise Form within three (3) Business Days of receipt of such
notice. In the event of any dispute or discrepancy, the records of the Holder shall be controlling and determinative in the absence of manifest error. The Holder and any assignee, by acceptance of 

  
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this Warrant, acknowledge and agree that, by reason of the provisions of this paragraph, following the purchase of a portion of the Warrant Shares hereunder, the number of Warrant Shares
available for purchase hereunder at any given time may be less than the amount stated on the face hereof. 
 b)
Exercise Price. The exercise price per share of the Common Stock under this Warrant shall be $        3, subject to adjustment hereunder (the
“Exercise Price”). 
 c) Cashless Exercise. This Warrant may also be exercised, in whole or in part,
at such time by means of a “cashless exercise” in which the Holder shall be entitled to receive a certificate for the number of Warrant Shares equal to the quotient obtained by dividing [(A-B) (X)] by (A), where: 

 

					
	 (A)
	 	=	 	the VWAP on the Trading Day immediately preceding the date on which Holder elects to exercise this Warrant by means of a “cashless exercise,” as set forth in the applicable Notice of Exercise;
			
	 (B)
	 	=	 	the Exercise Price of this Warrant, as adjusted hereunder; and
			
	 (X)
	 	=	 	the number of Warrant Shares that would be issuable upon exercise of this Warrant in accordance with the terms of this Warrant if such exercise were by means of a cash exercise rather than a cashless exercise.

 d) Mechanics of Exercise. 

i. Delivery of Certificates Upon Exercise. Certificates for shares purchased hereunder shall be transmitted by the
Transfer Agent to the Holder by physical delivery to the address specified by the Holder in the Notice of Exercise by the date that is three (3) Trading Days after the latest of (A) the delivery to the Company of the Notice of Exercise
Form, (B) surrender of this Warrant (if required), and (C) payment of the aggregate Exercise Price as set forth above (including by cashless exercise) (such date, the “Warrant Share Delivery Date”). This Warrant shall be
deemed to have been exercised on the first date on which all of the foregoing have been delivered to the Company. The Warrant Shares shall be deemed to have been issued, and Holder or any other person so designated to be named therein shall be
deemed to have become a holder of record of such shares for all purposes, as of the date the Warrant has been exercised, with payment to the Company of the Exercise Price (or by cashless exercise) and all taxes required to be paid by the Holder, if
any, having been paid. 
 ii. Delivery of New Warrants Upon Exercise. If this Warrant shall have been exercised in
part, the Company shall, at the request of a Holder and upon surrender of this Warrant certificate, at the time of delivery of the certificate or certificates representing Warrant Shares, deliver to Holder a new Warrant evidencing the rights of
Holder to purchase the unpurchased Warrant Shares called for by this Warrant, which new Warrant shall in all other respects be identical with this Warrant. 
  

 

	3 	The Exercise Price shall be equal to 125% of the price per share in the IPO. 

  
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 iii. Failure to Deliver Certificates. If, in the case of any Notice of
Exercise, such certificate or certificates are not delivered to or as directed by the applicable Holder by the Share Delivery Date, the Holder shall be entitled to elect by written notice to the Corporation at any time on or before its receipt of
such certificate or certificates, to rescind such Notice of Exercise, in which event the Corporation shall promptly return to the Holder any Warrant certificate delivered to the Corporation and the Holder shall promptly return to the Corporation the
Common Stock certificates issued to such Holder pursuant to the rescinded Notice of Exercise. 
 iv. No Fractional Shares
or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this Warrant. As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such exercise, the Company
shall, at its election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Exercise Price or round up to the next whole share. 

v. Closing of Books. The Company will not close its stockholder books or records in any manner which prevents the timely
exercise of this Warrant, pursuant to the terms hereof. 
 e) Call Provision. Subject to the provisions of this
Section 2(e), if, after the earlier of the effective date of the Registration Statement “Effective Date”), (i) the VWAP for each of 30 consecutive Trading Days (the “Measurement Period,” which 30
consecutive Trading Day period shall not have commenced until after the Effective Date) exceeds 250% of the then Exercise Price, and (ii) the Common Stock is listed on any of the Nasdaq Global Market, Nasdaq Capital Market, Nasdaq Global Select
Market, NYSE or NYSE MKT (or any successor exchanges), then the Company may, within 1 Trading Day of the end of such Measurement Period, call for cancellation of all or any portion of this Warrant for which a Notice of Exercise has not yet been
delivered (such right, a “Call”) for consideration equal to $.001 per Warrant Share. To exercise this right, the Company must deliver to the Holder an irrevocable written notice (a “Call Notice”), indicating therein
the portion of unexercised portion of this Warrant to which such notice applies. If the conditions set forth below for such Call are satisfied from the period from the date of the Call Notice through and including the Call Date (as defined below),
then any portion of this Warrant subject to such Call Notice for which a Notice of Exercise shall not have been received by the Call Date will be cancelled at 6:30 p.m. (New York City time) on the tenth (10th) calendar day after the date the
Call Notice is received by the Holder (such date and time, the “Call Date”). Any unexercised portion of this Warrant to which the Call Notice does not pertain will be unaffected by such Call Notice. In furtherance thereof, the
Company covenants and agrees that it will honor all Notices of Exercise with respect to Warrant Shares subject to a Call Notice that are tendered through 6:30 p.m. (New York City time) on the Call Date. The parties agree that any Notice of Exercise
delivered following a Call Notice which calls less than all the Warrants shall first reduce to zero the number of Warrant Shares subject to such Call Notice prior to reducing the remaining Warrant Shares available for purchase under this Warrant.
For example, if (A) this Warrant then permits the Holder to acquire 100 Warrant Shares, (B) a Call Notice pertains to 75 Warrant Shares, and (C) prior to 6:30 p.m. (New York City time) on the Call Date the Holder tenders a Notice of
Exercise in respect of 50 Warrant Shares, then (x) on the Call Date the right under this Warrant to acquire 25 Warrant Shares will be automatically cancelled, (y) the Company, in the time and manner required

  
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under this Warrant, will have issued and delivered to the Holder 50 Warrant Shares in respect of the exercises following receipt of the Call Notice, and (z) the Holder may, until the
Termination Date, exercise this Warrant for 25 Warrant Shares (subject to adjustment as herein provided and subject to subsequent Call Notices). Subject again to the provisions of this Section 2(e), the Company may deliver subsequent Call
Notices for any portion of this Warrant for which the Holder shall not have delivered a Notice of Exercise. Notwithstanding anything to the contrary set forth in this Warrant, the Company may not deliver a Call Notice or require the cancellation of
this Warrant (and any such Call Notice shall be void), unless, from the beginning of the Measurement Period through the Call Date, (1) the Company shall have honored in accordance with the terms of this Warrant all Notices of Exercise delivered
by 6:30 p.m. (New York City time) on the Call Date, and (2) the Registration Statement shall be effective as to all Warrant Shares and the prospectus thereunder available for use by the Holder for the resale of all such Warrant Shares, and
(3) the Common Stock shall be listed or quoted for trading on the Nasdaq Global Market, Nasdaq Capital Market, Nasdaq Global Select Market, NYSE or NYSE MKT (or any successor exchanges), and (4) there is a sufficient number of authorized
shares of Common Stock for issuance of all Warrant Shares. The Company’s right to call the Warrants under this Section 2(e) shall be exercised ratably among the Holders based on each Holder’s initial purchase of Warrants. 

Section 3. Certain Adjustments. 

a) Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding: (i) pays a stock
dividend or otherwise makes a distribution or distributions on its shares of Common Stock or any other equity or equity equivalent securities payable in shares of Common Stock (which, for avoidance of doubt, shall not include any shares of Common
Stock issued by the Company upon exercise of this Warrant), (ii) subdivides outstanding shares of Common Stock into a larger number of shares, (iii) combines (including by way of reverse stock split) outstanding shares of Common Stock into
a smaller number of shares or (iv) issues by reclassification of shares of the Common Stock any shares of capital stock of the Company, then in each case the Exercise Price shall be multiplied by a fraction of which the numerator shall be the
number of shares of Common Stock (excluding treasury shares, if any) outstanding immediately before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event, and the number of
shares issuable upon exercise of this Warrant shall be proportionately adjusted such that the aggregate Exercise Price of this Warrant shall remain unchanged. Any adjustment made pursuant to this Section 3(a) shall become effective immediately
after the record date for the determination of stockholders entitled to receive such dividend or distribution and shall become effective immediately after the effective date in the case of a subdivision, combination or
re-classification. 
 b) Subsequent Rights Offerings. If the Company, at any
time while the Warrant is outstanding, shall issue rights, options or warrants to all holders of Common Stock (and not to the Holders) entitling them to subscribe for or purchase shares of Common Stock at a price per share less than the VWAP on the
record date mentioned below, then, the Exercise Price shall be multiplied by a fraction, of which the denominator shall be the number of shares of the Common Stock outstanding on the date of issuance of such rights, options or warrants plus the
number of additional shares of Common Stock offered for subscription or purchase, and of which the numerator shall be the number of shares of the Common Stock outstanding on the date of issuance of such rights, options or warrants plus the number of
shares which the aggregate offering price of the total number of shares so offered (assuming receipt by the Company in full of all consideration payable upon exercise of such rights, options or warrants) would purchase at

  
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such VWAP. Such adjustment shall be made whenever such rights, options or warrants are issued, and shall become effective immediately after the record date for the determination of stockholders
entitled to receive such rights, options or warrants. 
 c) Fundamental Transaction. If, at any time while this
Warrant is outstanding, (i) the Company, directly or indirectly, in one or more related transactions effects any merger or consolidation of the Company with or into another Person, (ii) the Company, directly or indirectly, effects any
sale, lease, license, assignment, transfer, conveyance or other disposition of all or substantially all of its assets in one or a series of related transactions, (iii) any, direct or indirect, purchase offer, tender offer or exchange offer
(whether by the Company or another Person) is completed pursuant to which holders of Common Stock are permitted to sell, tender or exchange their shares for other securities, cash or property and has been accepted by the holders of 50% or more of
the outstanding Common Stock, (iv) the Company, directly or indirectly, in one or more related transactions effects any reclassification, reorganization or recapitalization of the Common Stock or any compulsory share exchange pursuant to which
the Common Stock is effectively converted into or exchanged for other securities, cash or property, (v) the Company, directly or indirectly, in one or more related transactions consummates a stock or share purchase agreement or other business
combination (including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than 50% of the outstanding shares of Common Stock (not including any
shares of Common Stock held by the other Person or other Persons making or party to, or associated or affiliated with the other Persons making or party to, such stock or share purchase agreement or other business combination) (each a
“Fundamental Transaction”), then, upon any subsequent exercise of this Warrant, the Holder shall have the right to receive, for each Warrant Share that would have been issuable upon such exercise immediately prior to the occurrence
of such Fundamental Transaction, at the option of the Holder, the number of shares of Common Stock of the successor or acquiring corporation or of the Company, if it is the surviving corporation, and any additional consideration (the
“Alternate Consideration”) receivable as a result of such Fundamental Transaction by a holder of the number of shares of Common Stock for which this Warrant is exercisable immediately prior to such Fundamental Transaction. For
purposes of any such exercise, the determination of the Exercise Price shall be appropriately adjusted to apply to such Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one share of Common Stock in such
Fundamental Transaction, and the Company shall apportion the Exercise Price among the Alternate Consideration in a reasonable manner reflecting the relative value of any different components of the Alternate Consideration. If holders of Common Stock
are given any choice as to the securities, cash or property to be received in a Fundamental Transaction, then the Holder shall be given the same choice as to the Alternate Consideration it receives upon any exercise of this Warrant following such
Fundamental Transaction. The Company shall cause any successor entity in a Fundamental Transaction in which the Company is not the survivor (the “Successor Entity”) to assume in writing all of the obligations of the Company under
this Warrant in accordance with the provisions of this Section 3(c) prior to such Fundamental Transaction. Upon the occurrence of any such Fundamental Transaction, the Successor Entity shall succeed to, and be substituted for (so that from and
after the date of such Fundamental Transaction, the provisions of this Warrant referring to the “Company” shall refer instead to the Successor Entity), and may exercise every right and power of the Company and shall assume all of the
obligations of the Company under this Warrant with the same effect as if such Successor Entity had been named as the Company herein. 

d) Calculations. All calculations under this Section 3 shall be made to the nearest cent or the nearest 1/100th of
a share, as the case may be. For purposes of this Section 3, the 

  
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number of shares of Common Stock deemed to be issued and outstanding as of a given date shall be the sum of the number of shares of Common Stock (excluding treasury shares, if any) issued and
outstanding. 
 e) Notice to Holder. 

i. Adjustment to Exercise Price. Whenever the Exercise Price is adjusted pursuant to any provision of this
Section 3, the Company shall mail to the Holder a notice setting forth the Exercise Price after such adjustment and setting forth a brief statement of the facts requiring such adjustment. 

ii. Notice to Allow Exercise by Holder. If (A) the Company shall declare a dividend (or any other distribution in
whatever form) on the Common Stock, excluding a stock dividend as contemplated in Section 3(a), (B) the Company shall declare a special nonrecurring cash dividend on or a redemption of the Common Stock, (C) the Company shall authorize
the granting to all holders of the Common Stock rights or warrants to subscribe for or purchase any shares of capital stock of any class or of any rights, (D) the approval of any stockholders of the Company shall be required in connection with
any reclassification of the Common Stock, any consolidation or merger to which the Company is a party, any sale or transfer of all or substantially all of the assets of the Company, or any compulsory share exchange whereby the Common Stock is
converted into other securities, cash or property (in each case, excluding any event contemplated in Section 3(a)), or (E) the Company shall authorize the voluntary or involuntary dissolution, liquidation or winding up of the affairs of
the Company, then, in each case, the Company shall cause to be mailed to the Holder at its last address as it shall appear upon the Warrant Register of the Company, at least 10 calendar days prior to the applicable record or effective date
hereinafter specified, a notice stating (x) the date on which a record is to be taken for the purpose of such dividend, distribution, redemption, rights or warrants, or if a record is not to be taken, the date as of which the holders of the
Common Stock of record to be entitled to such dividend, distributions, redemption, rights or warrants are to be determined or (y) the date on which such reclassification, consolidation, merger, sale, transfer or share exchange is expected to
become effective or close, and the date as of which it is expected that holders of the Common Stock of record shall be entitled to exchange their shares of the Common Stock for securities, cash or other property deliverable upon such
reclassification, consolidation, merger, sale, transfer or share exchange; provided that the failure to mail such notice or any defect therein or in the mailing thereof shall not affect the validity of the corporate action required to be specified
in such notice. The Holder shall remain entitled to exercise this Warrant during the period commencing on the date of such notice to the effective date of the event triggering such notice, except as may otherwise be expressly set forth herein. 

Section 4. Transfer of Warrant. 

a) Transferability. Subject to compliance with any applicable securities laws and the conditions set forth in
Section 4(d) hereof, this Warrant and all rights hereunder are transferable, in whole or in part, upon surrender of this Warrant at the principal office of the Company or its designated agent, together with a written assignment of this Warrant
substantially in the form attached hereto duly executed by the Holder or its agent or attorney and funds 

  
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sufficient to pay any transfer taxes payable upon the making of such transfer. Upon such surrender and, if required, such payment, the Company shall execute and deliver a new Warrant or Warrants
in the name of the assignee or assignees, as applicable, and in the denomination or denominations specified in such instrument of assignment, and shall issue to the assignor a new Warrant evidencing the portion of this Warrant not so assigned, and
this Warrant shall promptly be cancelled. The Warrant, if properly assigned in accordance herewith, may be exercised by a new holder for the purchase of Warrant Shares without having a new Warrant issued. 

b) New Warrants. This Warrant may be divided or combined with other Warrants upon presentation hereof at the aforesaid
office of the Company, together with a written notice specifying the names and denominations in which new Warrants are to be issued, signed by the Holder or its agent or attorney. Subject to compliance with Section 4(a), as to any transfer
which may be involved in such division or combination, the Company shall execute and deliver a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided or combined in accordance with such notice. All Warrants issued on transfers
or exchanges shall be dated the original issue date and shall be identical with this Warrant except as to the number of Warrant Shares issuable pursuant thereto. 

c) Warrant Register. The Company shall register this Warrant, upon records to be maintained by the Company for that
purpose (the “Warrant Register”), in the name of the record Holder hereof from time to time. The Company may deem and treat the registered Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or
any distribution to the Holder, and for all other purposes, absent actual notice to the contrary. 
 d) Transfer
Restrictions. If, at the time of the surrender of this Warrant in connection with any transfer of this Warrant, the transfer of this Warrant shall not be eligible for resale without volume or manner-of-sale restrictions or current public
information requirements pursuant to Rule 144, the Company may require, as a condition of allowing such transfer, that the Holder or transferee of this Warrant, as the case may be, provide to the Company an opinion of counsel selected by the Holder
or transferee and reasonably acceptable to the Company, the form and substance of which opinion shall be reasonably satisfactory to the Company, to the effect that such transfer does not require registration of such transferred Securities under the
Securities Act. 
 e) Representation by the Holder. The Holder, by the acceptance hereof, represents and warrants that
it is acquiring this Warrant and, upon any exercise hereof, will acquire the Warrant Shares issuable upon such exercise, for its own account and not with a view to or for distributing or reselling such Warrant Shares or any part thereof in violation
of the Securities Act or any applicable state securities law, except pursuant to sales registered or exempted under the Securities Act. 

Section 5. Miscellaneous. 

a) No Rights as Stockholder Until Exercise. This Warrant does not entitle the Holder to any voting rights, dividends or
other rights as a stockholder of the Company prior to the exercise hereof as set forth in Section 2(d)(i). 
 b)
Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that upon receipt by the Company of evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of this Warrant or any stock certificate
relating to the Warrant Shares, and in case of loss, theft or destruction, of indemnity or security reasonably satisfactory to it (which, in the case of the Warrant, shall not include the posting of any bond), and upon surrender

  
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and cancellation of such Warrant or stock certificate, if mutilated, the Company will make and deliver a new Warrant or stock certificate of like tenor and dated as of such cancellation, in lieu
of such Warrant or stock certificate. 
 c) Saturdays, Sundays, Holidays, etc. If the last or appointed day for the
taking of any action or the expiration of any right required or granted herein shall not be a Business Day, then, such action may be taken or such right may be exercised on the next succeeding Business Day. 

d) Authorized Shares. The Company covenants that, during the period commencing on the Initial Exercise Date and through
the date that the Warrant is outstanding, it will reserve from its authorized and unissued Common Stock a sufficient number of shares to provide for the issuance of the Warrant Shares upon the exercise of any purchase rights under this Warrant. The
Company further covenants that its issuance of this Warrant shall constitute full authority to its officers who are charged with the duty of executing stock certificates to execute and issue the necessary certificates for the Warrant Shares upon the
exercise of the purchase rights under this Warrant. The Company will take all such reasonable action as may be necessary to assure that such Warrant Shares may be issued as provided herein without violation of any applicable law or regulation, or of
any requirements of the Trading Market upon which the Common Stock may be listed. The Company covenants that all Warrant Shares which may be issued upon the exercise of the purchase rights represented by this Warrant will, upon exercise of the
purchase rights represented by this Warrant and payment for such Warrant Shares in accordance herewith, be duly authorized, validly issued, fully paid and nonassessable and free from all taxes, liens and charges created by the Company in respect of
the issue thereof (other than taxes in respect of any transfer occurring contemporaneously with such issue). 
 e)
Governing Law, Jurisdiction, Etc. This Warrant shall be governed by and construed solely and exclusively under and pursuant to the laws of the State of Delaware as applied to agreements among Delaware residents entered into and to be
performed entirely within Delaware. Each of the parties hereto expressly and irrevocably (1) agrees that any legal suit, action or proceeding arising out of or relating to this Agreement will be instituted exclusively in a court of competent
jurisdiction in Wilmington, Delaware; (2) waives any objection they may have now or hereafter to the venue of any such suit, action or proceeding; and (3) consents to the in personam jurisdiction of such courts in any such suit,
action or proceeding. 
 f) Restrictions. The Holder acknowledges that the Warrant Shares acquired upon the exercise
of this Warrant, if not registered, will have restrictions upon resale imposed by state and federal securities laws. 
 g)
Nonwaiver. No course of dealing or any delay or failure to exercise any right hereunder on the part of Holder shall operate as a waiver of such right or otherwise prejudice Holder’s rights, powers or remedies, notwithstanding the fact
that all rights hereunder terminate on the Termination Date. 
 h) Notices. Any notice, request or other document
required or permitted to be given or delivered to the Holder by the Company at the address set forth in the Company’s records. 

i) Successors and Assigns. Subject to applicable securities laws, this Warrant and the rights and obligations evidenced
hereby shall inure to the benefit of and be binding upon the successors and permitted assigns of the Company and the successors and permitted assigns of 

  
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Holder. The provisions of this Warrant are intended to be for the benefit of any Holder from time to time of this Warrant and shall be enforceable by the Holder or holder of Warrant Shares. 

j) Amendment. This Warrant may be modified or amended or the provisions hereof waived with the written consent of the
Company and the Holder. 
 k) Severability. Wherever possible, each provision of this Warrant shall be interpreted in
such manner as to be effective and valid under applicable law, but if any provision of this Warrant shall be prohibited by or invalid under applicable law, such provision shall be ineffective to the extent of such prohibition or invalidity, without
invalidating the remainder of such provisions or the remaining provisions of this Warrant. 
 l) Headings. The
headings used in this Warrant are for the convenience of reference only and shall not, for any purpose, be deemed a part of this Warrant. 

******************** 

(Signature Pages Follow) 

  
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 IN WITNESS WHEREOF, the Company has caused this Warrant to be executed by its officer thereunto
duly authorized as of the date first above indicated. 
  

			
	ECM ENERGY SERVICES, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	

  
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 NOTICE OF EXERCISE 

TO: ECM ENERGY SERVICES, INC. 
 (1) The
undersigned hereby elects to purchase                  Warrant Shares of the Company pursuant to the terms of the attached Warrant (only if exercised in full), and
tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if any. 
 (2) Payment shall take the
form of (check applicable box): 
  ̈ in lawful money of the United States; or 

 ̈ the cancellation of such number of Warrant Shares as is necessary, in accordance with the
formula set forth in subsection 2(c), to exercise this Warrant with respect to the maximum number of Warrant Shares purchasable pursuant to the cashless exercise procedure set forth in subsection 2(c). 

(3) Please issue a certificate or certificates representing said Warrant Shares in the name of the undersigned or in such other name as is
specified below: 
  

                       
                                  

The Warrant Shares shall be delivered by physical delivery of a certificate to: 
  

                       
                                  

 

                       
                                  

 

                       
                                  

(4) Accredited Investor. The undersigned is an “accredited investor” as defined in Regulation D promulgated under the
Securities Act of 1933, as amended. 
 [SIGNATURE OF HOLDER] 
  

			
	 Name of Investing Entity:
	 	  

			
	 Signature of Authorized Signatory of Investing Entity:
	 	  

			
	 Name of Authorized Signatory:
	 	  

			
	 Title of Authorized Signatory:
	 	  

			
	 Date:
	 	  

 ASSIGNMENT FORM 

(To assign the foregoing warrant, execute 

this form and supply required information. 

Do not use this form to exercise the warrant.) 

FOR VALUE RECEIVED, [        ] all of or
[                ] shares of the foregoing Warrant and all rights evidenced thereby are hereby assigned to 

                          
                                         
                    whose address is     

                          
                                         
                                         
         . 
  

                          
                                         
                                         
          

                          
                                         
                                 Dated:
            ,          
  

							
		 	Holder’s Signature:  	 	  
	 	
				
		 	Holder’s Address:	 	  
	 	
				
		 		 	  
	 	

 Signature Guaranteed:
                                         
                                         
                   
 NOTE: The signature to this Assignment
Form must correspond with the name as it appears on the face of the Warrant, without alteration or enlargement or any change whatsoever, and must be guaranteed by a bank or trust company. Officers of corporations and those acting in a fiduciary or
other representative capacity should file proper evidence of authority to assign the foregoing Warrant.EX-4.3

 Exhibit 4.3 

THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT PURPOSES ONLY AND MAY NOT BE TRANSFERRED UNTIL (i) A REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE “ACT”) SHALL HAVE BECOME EFFECTIVE WITH RESPECT THERETO OR (ii) RECEIPT BY THE COMPANY OF AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE COMPANY TO THE EFFECT THAT REGISTRATION UNDER THE ACT IS NOT
REQUIRED IN CONNECTION WITH SUCH PROPOSED TRANSFER NOR IS IN VIOLATION OF ANY APPLICABLE STATE SECURITIES LAWS. 
 ECM ENERGY
SERVICES, INC. 
 12% UNSECURED CONVERTIBLE PROMISSORY NOTE 

 

			
	$        .00	 	            , 2013

 FOR VALUE RECEIVED, ECM Energy Services, Inc., a Delaware corporation (the “Company”)
with its principal executive office at                             , promises to pay to the order of
                    (the “Payee” or the “Holder”) or registered assigns, on the earlier of:
(i) the 18-month anniversary of the date hereof, or (ii) a completion by the Company of a Qualified Offering (as defined below), unless accelerated due to the occurrence of an Event of Default (the earlier of such dates is referred to as
the “Maturity Date”), the principal amount of             Dollars ($        .00) (the “Principal
Amount”) and interest on the Principal Amount (as set forth in Section 3), in such coin or currency of the United States of America as at the time of payment shall be legal tender for the payment of public and private debts.
Interest on this Note shall accrue on the Principal Amount outstanding from time to time at a rate per annum computed in accordance with Section 3 hereof. This Note may be prepaid by the Company without penalty. This
“Note” is part of an offering of up to $3,000,000.00 in principal amount of “Notes” being made by the Company. 

1. Qualified Offering. A “Qualified Offering” means the completion of the initial public offering of the
Company’s common stock (“Common Stock”) pursuant to which the Common Stock becomes registered pursuant to Section 12(b) of the Securities Exchange Act of 1934, as amended. 

2. Conversion Upon a Qualified Offering. 

A. Offer Notice; Election of Full Conversion. If the Company commences a Qualified Offering prior to or on the Maturity Date, the
Company will deliver to the Holder a notice (the “Offer Notice”), stating that such a Qualified Offering has been commenced no earlier than 45 business days prior to the expected closing date of the Qualified Offering. The
Holder will thereafter have the right to notify the Company that such Holder will convert all, but not less than all, of the Principal Amount of this Note into the Common Stock issuable in the Qualified Offering at a conversion price equal to the
price per share in the Qualified Offering (the “Conversion Price”), calculated as of the date the Qualified Offering is completed, by completion of the Notice of Full Conversion set forth as Annex A delivered not later
than ten (10) days after receipt of the Offer Notice. 
 B. Automatic Conversion. If the Company does not receive the
Notice of Full Conversion as set forth in Section 2.A. above, if the Qualified Offering is completed, without further action from the Holder, 50% of the Principal Amount of this Note shall be converted into shares of Common Stock

  
 1 

 
at the Conversion Price with the remaining 50% of the Principal Amount of this Note being repaid from proceeds received from the Qualified Offering. 

3. Computation of Interest. 

A. Base Interest Rate; Payment of Interest. Subject to subsection 3.B., the outstanding Principal Amount shall bear interest at the rate
of 12.0% per annum, provided that in no event shall the interest rate exceed the Maximum Rate provided in Section 3.B. below. Interest shall be based on a 360 day year. Accrued interest will be due and payable on the last day of each
calendar month commencing on the last day of the first full month after the date of issuance of this Note with any remaining unpaid interest to be paid on the Maturity Date. 

B. Additional Interest. Upon the conversion or repayment of this Note due to the completion of a Qualified Offering, the Company shall
pay any accrued and unpaid interest on this Note in cash through the date of the Qualified Offering; provided that if the Qualified Offering occurs prior to the 12-month anniversary of the issuance of this Note, the Company shall pay interest in
amount equal to 12 months of interest (less any interest amounts previously paid). 
 C. Maximum Rate. In the event that it is
determined that, under the laws relating to usury applicable to the Company or the indebtedness evidenced by this Note (“Applicable Usury Laws”), the interest charges and fees payable by the Company in connection herewith or
in connection with any other document or instrument executed and delivered in connection herewith cause the effective interest rate applicable to the indebtedness evidenced by this Note to exceed the maximum rate allowed by law (the
“Maximum Rate”), then such interest shall be recalculated for the period in question and any excess over the Maximum Rate paid with respect to such period shall be credited, without further agreement or notice, to the
Principal Amount outstanding hereunder to reduce said balance by such amount with the same force and effect as though the Company had specifically designated such extra sums to be so applied to principal and the Payee had agreed to accept such extra
payment(s) as a premium-free prepayment. All such deemed prepayments shall be applied to the principal balance payable at maturity. In no event shall any agreed-to or actual exaction as consideration for this Note exceed the limits imposed or
provided by Applicable Usury Laws in the jurisdiction in which the Company is resident applicable to the use or detention of money or to forbearance in seeking its collection in the jurisdiction in which the Company is resident. 

4. Covenants of Company 

A. Affirmative Covenants. The Company covenants and agrees that, so long as this Note shall be outstanding, it will perform the
obligations set forth in this Section 4.A.: 
 (i) Maintenance of Existence. The Company will do or cause to be done all things
reasonably necessary to preserve and keep in full force and effect its corporate existence, rights and franchises and comply with all laws applicable to the Company, except where the failure to comply would not have a material adverse effect on the
Company; and 
 (ii) Books and Records. The Company will at all times keep true and correct books, records and accounts reflecting
its business affairs. Such books and records shall be open at reasonable times and upon reasonable notice to the inspection of the Payee or its agents. 

B. Negative Covenants. The Company covenants and agrees that, so long as this Note shall be outstanding, it will perform the
obligations set forth in this Section 4.B. (unless waived by or on behalf of the Holder): 

  
 2 

 (i) Dividends. The Company will not declare or pay any cash dividends or distributions on
its outstanding capital stock. 
 5. Events of Default 

A. The term “Event of Default” shall mean any of the events set forth in this Section 5.A.: 

(i) Non-Payment of Obligations. The Company shall default in the payment of the Principal Amount or accrued interest of this Note as
and when the same shall become due and payable, whether by acceleration or otherwise. 
 (ii)
Non-Performance of Affirmative Covenants. The Company shall materially default in the due observance or performance of any covenant set forth in Section 4.A. 

(iii) Non-Performance of Negative Covenants. The Company shall materially default in the due
observance or performance of any covenant set forth in Section 4.B. 
 (iv) Bankruptcy, Insolvency, etc. The Company shall:

 (a) apply for, consent to, or acquiesce in, the appointment of a trustee, receiver, sequestrator or other custodian for the Company, or
make a general assignment for the benefit of creditors; or 
 (b) permit or suffer to exist the commencement of any bankruptcy,
reorganization, debt arrangement or other case or proceeding under any bankruptcy or insolvency law, or any dissolution, winding up or liquidation proceeding, in respect of the Company, and, if such case or proceeding is not commenced by the Company
or converted to a voluntary case, such case or proceeding shall be consented to or acquiesced in by the Company or shall result in the entry of an order for relief. 

B. Action if Bankruptcy. If any Event of Default described in clause (iv) of Section 5.A. shall occur, the outstanding
Principal Amount of this Note and all other obligations hereunder shall automatically be and become immediately due and payable, without notice or demand. 

C. Action if Other Event of Default. If any Event of Default (other than any Event of Default described in clause (iv) of
Section 5.A.) shall occur for any reason, whether voluntary or involuntary, and be continuing, for thirty (30) days after written notice thereof by Holder to the Company, during which period such Event of Default is not cured, the Holder
may, upon notice to the Company, declare all or any portion of the outstanding Principal Amount of the Note, together with interest accrued thereon, to be due and payable and any or all other obligations hereunder to be due and payable, whereupon
the full unpaid principal amount hereof, such accrued interest and any and all other such obligations which shall be so declared due and payable shall be and become immediately due and payable, without further notice, demand, or presentment. 

6. Miscellaneous. 
 A.
Parties in Interest. All covenants, agreements and undertakings in this Note binding upon the Company or the Payee shall bind and inure to the benefit of the successors and permitted assigns of the Company and the Payee, respectively, whether
so expressed or not. 
 B. Governing Law. This Note shall be governed by the laws of the State of Delaware as applied to contracts
entered into and to be performed entirely within the State of Delaware. Any action 

  
 3 

 
arising out of this Note shall be brought exclusively in a court of competent jurisdiction in Wilmington, Delaware, and the parties hereby irrevocably waive any objections they may have to venue
in Wilmington, Delaware. 
 C. Waiver of Jury Trial. THE PARTIES HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE ANY RIGHTS
THEY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED HEREON, OR ARISING OUT OF, UNDER, OR IN CONNECTION WITH, THIS NOTE OR ANY OTHER DOCUMENT OR INSTRUMENT EXECUTED AND DELIVERED IN CONNECTION HEREWITH, OR ANY COURSE OF CONDUCT,
COURSE OF DEALING, STATEMENTS (WHETHER VERBAL OR WRITTEN), OR ACTIONS OF THE PAYEE OR THE COMPANY. THIS PROVISION IS A MATERIAL INDUCEMENT FOR THE PAYEE’S PURCHASING THIS NOTE. 

D. Notice. All notices shall be in writing, and shall be deemed given when actually delivered to a party at its address set forth
herein personally, by a reputable overnight messenger. 
 E. No Waiver. No delay in exercising any right hereunder shall be deemed a
waiver thereof, and no waiver shall be deemed to have any application to any future default or exercise of rights hereunder. 
 IN WITNESS
WHEREOF, this Note has been executed and delivered on the date specified above by the duly authorized representative of the Company. 
  

	
	ECM ENERGY SERVICES, INC.
	
	By:                                     
                                         
   
	                    , President

  
 4 

 ANNEX A 

NOTICE OF FULL CONVERSION 
 (TO BE
EXECUTED BY THE REGISTERED HOLDER IN ORDER TO FULLY CONVERT THE NOTE UPON A QUALIFIED OFFERING) 
 The undersigned hereby elects to convert 100% of the
outstanding Principal Amount of the promissory note (the “Note”), of ECM Energy Services, Inc., a Delaware corporation (the “Company”), as of the date written below. If securities are to be issued in the name of a
person other than the undersigned, the undersigned will pay all transfer taxes payable with respect thereto. No fee will be charged to the Holder for any conversion, except for any such transfer taxes. 

 

			
	Address for Delivery:	 	                                     
                                         
      
		 	                                     
                                         
      
		 	                                     
                                         
      

  

			
	[HOLDER]
		
	By:	 	  

	Name:	 	
	Title:	 	

  
 5

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