December 15, 2022

Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549

        Re: Registration Statement on Form F-4 (Registration No. 333-268795)

To whom it may concern:

    Reference is made to the above-referenced registration statement (the
Registration Statement   ) of
Ambipar Emergency Response (the    Issuer   ) under the Securities Act of 1933,
as amended (the    Securities
Act   ) with respect to a proposed business combination involving a merger,
consolidation, exchange of
securities, acquisition of assets, or similar transaction involving a special
purpose acquisition company and one
or more target companies (the    Transaction   ). The Registration Statement
has not yet been declared effective
as of the date of this letter.

    This letter is to advise you that, effective as of July 5, 2022, our firm
has resigned from, or ceased or
refused to act in, every capacity and relationship in which we were described
in the Registration Statement as
acting or agreeing to act with respect to the Transaction.

    Therefore, we hereby advise you and the Issuer, pursuant to Section
11(b)(1) of the Securities Act, that
none of our firm, any person who controls it (within the meaning of either
Section 15 of the Securities Act or
Section 20 of the Securities Exchange Act of 1934, as amended) or any of its
affiliates (within the meaning of
Rule 405 under the Securities Act) will be responsible for any part of the
Registration Statement. This notice is
not intended to constitute an acknowledgment or admission that we have been or
are an underwriter (within the
meaning of Section 2(a)(11) of the Securities Act or the rules and regulations
promulgated thereunder) with
respect to the Transaction.
                                                  Sincerely,

                                                 CREDIT SUISSE SECURITIES (USA)
LLC

                                                 By:   Ryan Kelley
Digitally signed by Ryan Kelley
                                                                       Date:
2022.12.15 12:44:19 -05'00'



                                                 Name: 5\DQ .HOOH\
                                                 Title: 'LUHFWRU



cc: Thiago da Costa Silva, Ambipar Emergency Response
    Carlos Piani, HPX Corp.
    Ilir Mujalovic, Shearman & Sterling LLP
    Harald Halbhuber, Shearman & Sterling LLP
    Roberta Berliner Cherman, Shearman & Sterling LLP
    Grenfel S. Calheiros, Simpson Thacher & Barlett LLP
    J. Mathias von Bernuth, Skadden, Arps, Slate, Meagher & Flom LLP