Document:

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED
UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED
(THE "SECURITIES ACT") THE HOLDER HEREOF, BY PURCHASING SUCH
SECURITIES AGREES FOR THE BENEFIT OF THE COMPANY THAT SUCH
SECURITIES MAY BE OFFERED, SOLD OR OTHERWISE TRANSFERRED
ONLY (A) TO THE COMPANY, (B) PURSUANT TO AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT, OR (C) IF REGISTERED
UNDER THE SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES
LAWS. IN ADDITION, A SECURITIES PURCHASE AGREEMENT, DATED AS
OF THE DATE HERREOF, A COPY OF WHICH MAY BE OBTAINED FROM
THE COMPANY AT ITS PRINCIPAL EXECUTIVE OFFICE, CONTAINS
CERTAINADDITIONAL AGREEMENTS AMONG THE PARTIES, INCLUDING
WQITHOUT LIMITATION, PROVISIONS WHICH (A) LIMIT THE
CONVERSION RIGHTS OF THE HOLDER, (B) SPECIFY VOLUNTARY AND
MAN DATORY REPAYMENT, PREPAYMENT AND REDEMPTION RIGHTS AND
OBLIGATIONS AND (C) SPECIFY THE EVENTS OF DEFAULT FOOLLOWING
WHICH THE REMAINING BALANCE DUE AND OWING HEREUNDER MAY BE
ACCELERATED.

No.B-001
$300,000

            WORLDNET RESOURCES GROUP, INC. f/k/a
             MULTI-MEDIA INDUSTRIES CORPORATION

                  8% Note due June 16, 2000

WORLDNET RESOURCES GROUP, INC. f/k/a MULTI-MEDIA INDUSTRIES
CORPORATION, a Utah corporation (together with its
successors, the ("Company"), for value received hereby
promises to pay to H.A.A. Inc. or its registered assigns,
the principal sum Three Hundred Thousand Dollars ($300,000)
or, if less, the principal amount of this Note then
outstanding, on the Maturity Date to the Holder 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, and to pay interest, monthly in arrears,
on (i) the last day of each calendar month of each year
until the Maturity Date, commencing April 16, 2000 (unless
such day is not a Business Day, in which event on the next
succeeding Business Day) ( each an "Interest Payment Date"),
(ii) the Maturity Date, and (iii) the date the principal
amount of the Note shall be declared to be or shall
automatically become due and payable, on the principal sum
hereof outstanding in like coin or currency, at the rates
per annum set forth below, from the most recent Interest
Payment Date to which interest has been paid on this Note,
or if no interest has been paid on this Note, from the date
of this Note until payment in full of the principal sum
hereof has been made.

The interest rate shall be (8%) per annum (the "Interest
Rate") or, if less, the maximum rate by applicable law. Past
due amounts (including interest, to the extent permitted by

<PAGE>

law) will also accrue interest at the Interest Rate plus 2%
per annum or, if less, the maximum rate permitted by
applicable law, and will be able on demand ("Default
Interest"). Interest on this Note will be calculated on the
basis of a 360-day year of twelve 30-day months. All
payments of principal and interest hereunder shall be made
for the benefit of the Holder pursuant to the terms of the
Agreement (hereafter defined). Except as otherwise provided
in this Note, the interest payable on each Interest Payment
Date shall be added to the outstanding principal amount of
this Note on such date and thereafter be considered part of
the outstanding principal amount.  The Company may elect to
pay the interest payable on any Interest Payment Date in
cash, provided it gives the registered holder written notice
of such election at least five (5) Business Days prior to
the applicable Interest Payment Date and pays the same by
such date.

This Note ("Note") is the duly authorized issuance of
$300,000 original principal amount Note of the Company
referred to in that certain Securities Purchase Agreement
dated as of the date hereof between the Company and the
Purchaser named therein (the "Agreement"). The Agreement
contains certain additional agreements among the parties
with respect to the terms of this Note, including, without
limitation, provisions which (A) specify voluntary and
mandatory repayment, prepayment, and redemption rights and
obligations and (B) specify Events of Default following
which the remaining balance due and owing hereunder may be
accelerated. All such provisions are an integral part of
this Note and are incorporated herein by reference. This
Note is transferable and assignable to one or more Persons,
in accordance with the limitations set forth in the
Agreement.

The Company shall keep a register  (the "Register") in which
shall be entered the names and addresses of the registered
holder of this Note and particulars of this Note held by
such holder and of all transfers of this Note. References to
the Holder or "Holders" shall mean the Person listed in the
Register as the registered holder of such Notes. The
ownership of this Note shall be proven by the Register

          1.   Certain Terms Defined.  All term defined in the
               Agreement and not otherwise defined herein shall
               have for purposes hereof the meanings provided
               for in the Agreement.

          2.   Covenants. The Company covenants and agrees to observe
               and perform each of its covenants, obligations and
               undertakings contained in the Agreement, which obligations
               and undertakings are expressly assumed herein by the Company
               and made for the benefit of the holder hereof.

<PAGE>

          3.   Payments of Principal. The Company shall repay the
               remaining unpaid balance on this Note on the Maturity Date.
               The Company may, and shall be obligated to, prepay all or a
               portion of this Note on the terms specified in the
               Agreement.

               Miscellaneous. This Note shall be deemed to
               be a contract made under the laws of the
               State of New York and for all purposes shall
               be governed by and construed in accordance
               with the laws of said State. The parties
               hereto, including all guarantors or
               endorsers, hereby waive presentment, demand,
               notice, protest and all other demands and
               notices in connection with the delivery,
               acceptance, performance and enforcement of
               this Note, except as specifically provided
               herein, and assent to extensions of the time
               of payment, or forbearance or other
               indulgence without notice. The Company hereby
               submits to the exclusive jurisdiction of the
               United States District Court for the Southern
               District of New York and of any New York
               State court sitting in New York City for
               purposes of all legal proceedings arising out
               of or relating to this Note. The Company
               irrevocably waives, to the fullest extent
               permitted by law, any objection which it may
               now or hereafter have to the laying of the
               venue of any such proceeding brought in such
               a court and any claim that nay such
               proceeding brought in such a court has been
               brought in an inconvenient forum. The Company
               hereby irrevocably waives any and all right
               to trial by jury in any legal proceeding
               arising out of or relating to this Note.
               Notwithstanding anything to the contrary in
               the foregoing, at the election of the Holder,
               any dispute between the Holder and the
               Company may be arbitrated rather than
               litigated in the courts, before and in
               accordance with the rules of the American
               Arbitration Association in New York City. The
               Company agrees to submit to and participate
               in any such arbitration.

The Holder of this Note by acceptance of this Note agrees to be bound by
the provisions of this Note, which are expressly binding on such Holder.

                         {Signature page follows}

<PAGE>

IN WITNESS WHEREOF, the Company has caused this instrument
to be duly executed.

Dated: March 16, 2000

                    WORLDNET RESOURCES GROUP, INC. f/k/a
                    MULTI-MEDIA INDUSTRIES, INC.

                    BY:____________________

                    NAME:____________________

                    TITLE __________________

<PAGE>Perma-Fix Environmental Services, Inc.

Dear Mr. Strauss:

     This  letter  agreement  ("Letter  Agreement@)  is   to
provide  the  terms  and conditions  under  which  RBB  Bank
Aktiengesellschaft,  a  bank organized  under  the  laws  of
Austria  ("RBB Bank") as agent for certain of  its  clients,
shall  loan $3,000,000 to Perma-Fix Environmental  Services,
Inc., a Delaware corporation ("PESI").

Loan.
_____
     Subject  to and upon the terms and conditions contained
herein, RBB Bank agrees to make a term loan (the "Loan")  to
PESI  in the aggregate principal amount of $3,000,000.   RBB
Bank  shall deliver to PESI $3,000,000 in cash on or  before
Tuesday, August 29, 2000 (the "Closing Date").  The terms of
the loan shall be as set forth in the Promissory Note, dated
the Closing Date, executed by PESI (the "Note").

Loan Fee.
________
     In  order  to induce RBB Bank into granting  the  Loan,
PESI  has  agreed  to pay RBB Bank a fee of  $15,000,  which
shall  be  deducted from the proceeds of the Loan  prior  to
delivery of such proceeds to PESI.

Warrants.
________
     Initial  Warrants.  In order to induce  RBB  Bank  into
granting  the  Loan, PESI has agreed to issue  to  RBB  Bank
certain warrants, having a term of three (3) years, allowing
the  purchase of up to 150,000 shares of PESI Common  Stock,
par  value  $.001  per  share (the "Common  Stock"),  at  an
exercise  price of $1.50 per share and containing a cashless
exercise provision.

     Two  Month Warrants.  If all principal and accrued  and
unpaid  interest under the Loan is not paid in full by  5:00
p.m.  New  York  time on October 30, 2000, then  PESI  shall
issue  to RBB Bank certain warrants, having a term of  three
(3)  years,  allowing the purchase of up  to  an  additional
5,000  shares of Common Stock for each $100,000 of principal
remaining  unpaid under the Note at 5:00 p.m. New York  time
on  October  30,  2000, or a maximum of  150,000  shares  of
Common Stock if no principal has been repaid under the Note,
at  an  exercise price equal to the closing market price  of
the  Common  Stock on the National Association of Securities
Dealers   Automated   Quotation   System   SmallCap   Market
("NASDAQ") on October 30, 2000.

     Collectively, the warrants are hereinafter referred  to
as  the "Warrants," the shares of Common Stock which may  be
issued  upon  exercise  of  such  Warrants  are  hereinafter
referred to as the "Warrant Shares."

Common Stock.
____________
     If  all principal and accrued and unpaid interest under
the  Loan is not paid in full by 5:00 p.m. New York time  on
November  29,  2000, then PESI shall issue  to  RBB  Bank  a
certain number of shares of Common Stock, with the number of
shares determined by dividing $300,000 by the closing market

                               -1-
<PAGE>
price  of  the Common Stock on the NASDAQ on such  date,  if
shares  of  Common Stock have been traded on the  NASDAQ  on
such date, or on the most recent trading date, if shares  of
Common  Stock  have not been traded on the  NASDAQ  on  such
date.

     If  all principal and accrued and unpaid interest under
the  Loan is not paid in full by 5:00 p.m. New York time  on
the 29th day of each month thereafter, then PESI shall issue
to  RBB Bank a certain additional number of shares of Common
Stock,  with  the  number of shares determined  by  dividing
$300,000 by the closing market price of the Common Stock  on
the NASDAQ on such date, if shares of Common Stock have been
traded  on  the NASDAQ on such date, or on the  most  recent
trading date, if shares of Common Stock have not been traded
on the NASDAQ on such date.

     Collectively, the shares of Common Stock which  may  be
issued  under  this "Common Stock" Section  are  hereinafter
referred to as the "Issuable Shares."

     The  Warrants  shall be executed by both PESI  and  RBB
Bank    and    shall    contain    appropriate    investment
representations, warranties and covenants.  The issuance  of
the Warrants, Warrant Shares and Issuable Shares are subject
to  appropriate  corporate, NASDAQ and regulatory  authority
approval.

Use of Proceeds.
________________
     PESI  may  use  the  proceeds  of  the  Loan  for   the
acquisition of Diversified Scientific Services, Inc. and for
any  other purposes which it deems appropriate in  the  best
interest of PESI.

Reporting Company.
_________________
     Although  the  Warrants,  the Warrant  Shares  and  the
Issuable  Shares (collectively, the "Securities") shall  not
be  registered under federal or state securities laws or any
rules  or  regulations  promulgated thereunder.  PESI  is  a
reporting company under the Securities Exchange Act of 1934,
as  amended  (the  "Exchange Act") and has  filed  with  the
Securities  and Exchange Commission (the "SEC") all  reports
required  to be filed by PESI under Section 13 or  15(d)  of
the  Exchange  Act.   RBB Bank has had  the  opportunity  to
review,  and  has reviewed, all such reports and information
which  RBB  Bank  deemed material to an investment  decision
regarding the purchase of the Securities.

Restrictive Legends.
___________________
     RBB Bank agrees that, subject to the provisions herein,
all  certificates representing the Securities shall  bear  a
restrictive legend which shall include, but not  be  limited
to,   a  legend  to  the  effect  that  (a)  the  Securities
represented  by  such certificate have not  been  registered
under   the   Securities  Act  of  1933,  as  amended   (the
"Securities  Act"),  and (b) unless there  is  an  effective
registration  statement  relating  to  the  Securities,  the
Securities may not be offered, sold, transferred, mortgaged,
pledged   or   hypothecated  without   an   exemption   from
registration and an opinion of counsel to PESI with  respect
thereto,  or  an  opinion from counsel for RBB  Bank,  which
opinion  is  satisfactory  to  PESI,  to  the  effect   that
registration  under the Securities Act is  not  required  in

                             -2-
<PAGE>
connection  with  such  sale or  transfer  and  the  reasons
therefor.   The legend on all such certificates  shall  make
reference to the registration rights set forth herein.

Representations, Warranties and Covenants of RBB Bank.
______________________________________________________
     RBB  Bank hereby represents, warrants and covenants  to
PESI as follows:

     Investment Intent.
     _________________
         RBB   Bank   represents  and  warrants   that   the
          Securities are being purchased or acquired  solely
          to be held by RBB Bank as agent for certain of its
          clients   who  have  provided  to  RBB  Bank   the
          $3,000,000  described  in this  Letter  Agreement.
          RBB  Bank=s  own account, for investment  purposes
          only  and  not with a view toward the distribution
          or  resale  to  others.   RBB  Bank  acknowledges,
          understands  and appreciates that  the  Securities
          have not been registered under the Securities  Act
          by   reason  of  a  claimed  exemption  under  the
          provisions of the Securities Act which depends, in
          large part, upon RBB Bank=s representations as  to
          investment invention, investor status, and related
          and other matters set forth herein.

     Certain Risk.
     _____________
          RBB  Bank  recognizes  that the  purchase  of  the
          Securities involves a high degree of risk in  that
          (a) PESI has sustained losses from its operations,
          and  may require substantial funds in addition  to
          the  proceeds of this private placement; (b)  that
          PESI has a substantial accumulated deficit; (c) an
          investment in PESI is highly speculative and  only
          investors who can afford the loss of their  entire
          investment should consider investing in  PESI  and
          the Securities; (d) an investor may not be able to
          liquidate  his investment; (e) transferability  of
          the  Securities is extremely limited; (f)  in  the
          event  of a disposition an investor could  sustain
          the   loss  of  his  entire  investment;  (g)  the
          Warrants  represent  the  right  to  exercise  and
          purchase shares of voting equity securities  in  a
          corporate entity that has an accumulated  deficit;
          (h)  no  return  on  investment,  whether  through
          distributions,  appreciation,  transferability  or
          otherwise,  and no performance by, through  or  of
          PESI,  has been promised, assured, represented  or
          warranted  by  PESI, or by any director,  officer,
          employee,  agent or representative  thereof;  and,
          (i) while the Common Stock is presently quoted and
          traded on the Boston Stock Exchange and the NASDAQ
          and  while  RBB Bank is a beneficiary  of  certain
          registration   rights   provided    herein,    the
          Securities  subscribed for and that are  purchased
          under   this   Letter  Agreement   (i)   are   not
          registered  under applicable federal  (U.  S.)  or
          state  securities laws, and thus may not be  sold,
          conveyed,    assigned   or   transferred    unless
          registered under such laws or unless an  exemption
          from registration is available under such laws, as
          more   fully  described  herein,  and   (ii)   the
          Securities  subscribed for  and  that  are  to  be
          purchased  under  this Letter  Agreement  are  not
          quoted,  traded or listed for trading or quotation
          on  the  NASDAQ, or any other organized market  or

                                -3-
<PAGE>
          quotation  system,  and  there  is  therefore   no
          present public or other market for the Securities,
          nor  can  there be any assurance that  the  Common
          Stock  of PESI will continue to be quoted,  traded
          or  listed for trading or quotation on the  Boston
          Stock  Exchange  or the NASDAQ  or  on  any  other
          organized market or quotation system.

     Prior Investment Experience.
     ____________________________
          RBB Bank acknowledges that it has prior investment
          experience, including investment in non-listed and
          non-registered  securities, or  has  employed  the
          services  of  an investment advisor,  attorney  or
          accountant to read all of the documents  furnished
          or  made  available by PESI to it and to  evaluate
          the  merits and risks of such an investment on its
          behalf,   and  that  it  recognizes   the   highly
          speculative nature of this investment.

     No Review by the SEC.
     ____________________
          RBB Bank hereby acknowledges that this offering of
          the  Securities has not been reviewed by  the  SEC
          because this private placement is intended to be a
          nonpublic  offering  pursuant  to  Sections   4(2)
          and/or   3(b)   of  the  Securities   Act   and/or
          Regulation D promulgated under the Securities Act.

     Not Registered.
     _______________
          RBB  Bank understands that the Securities have not
          been registered under the Securities Act by reason
          of a claimed exemption under the provisions of the
          Securities  Act which depends, in part,  upon  RBB
          Bank's  investment intention.  In this connection,
          RBB  Bank  understands that it is the position  of
          the   SEC  that  the  statutory  basis  for   such
          exemption   would   not   be   present   if    its
          representation  merely  meant  that  its   present
          intention was to hold such securities for a  short
          period,  such as the capital gains period  of  tax
          statutes,  for a deferred sale, for a market  rise
          (assuming  that  a market develops),  or  for  any
          other fixed period.

     No Public Market.
     ________________
          RBB  Bank  understands that  there  is  no  public
          market  for  the  Warrants.  RBB Bank  understands
          that  although there is presently a public  market
          for the Common Stock, including the Warrant Shares
          and  the  Issuable Shares, Rule 144  (the  "Rule")
          promulgated  under  the Securities  Act  requires,
          among  other conditions, a one-year holding period
          following   full  payment  of  the   consideration
          therefor  prior to the resale (in limited amounts)
          of  securities  acquired in a  nonpublic  offering
          without   having   to  satisfy  the   registration
          requirements under the Securities Act.   RBB  Bank
          understands  that PESI makes no representation  or
          warranty  regarding its fulfillment in the  future
          of  any  reporting requirements under the Exchange
          Act,  or  its dissemination to the public  of  any
          current  financial or other information concerning
          PESI,  as  is required by the Rule as one  of  the
          conditions   of   its  availability.    RBB   Bank
          understands and hereby acknowledges that  PESI  is
          under no obligation to register the Securities  or

                                 -4-
<PAGE>
          under  the  Securities Act, except  as  set  forth
          herein.   RBB  Bank agrees to hold  PESI  and  its
          directors,  officers and controlling  persons  and
          their     respective    heirs,    representatives,
          successors  and assigns harmless and to  indemnify
          them  against all liabilities, costs and  expenses
          incurred   by   them   as   a   result   of    any
          misrepresentation  made  by  RBB  Bank   contained
          herein or any sale or distribution by RBB Bank  in
          violation  of the Securities Act or any applicable
          state securities or "blue sky" laws (collectively,
          "Securities Laws").

     Sophisticated Investor.
     ______________________
          RBB  Bank hereby acknowledges and asserts that (a)
          RBB  Bank has adequate means of providing for  RBB
          Bank's   current  financial  needs  and   possible
          contingencies and has no need for liquidity of RBB
          Bank's investment in the Securities; (b) RBB  Bank
          is  able to bear the economic risks inherent in an
          investment in the Securities and that an important
          consideration bearing on its ability to  bear  the
          economic  risk  of the purchase of  Securities  is
          whether RBB Bank can afford a complete loss of RBB
          Bank's  investment in the Securities and RBB  Bank
          represents  and warrants that RBB Bank can  afford
          such  a  complete loss; and (c) RBB Bank has  such
          knowledge  and experience in business,  financial,
          investment and banking matters (including, but not
          limited  to, investments in restricted, non-listed
          and  non-registered securities) that RBB  Bank  is
          capable  of  evaluating  the  merits,  risks   and
          advisability of an investment in the Securities.

     Tax Consequences.
     _________________
          RBB  Bank  acknowledges  that  PESI  has  made  no
          representation regarding the potential  or  actual
          tax  consequences for RBB Bank which  will  result
          from  entering  into and consummating  the  Letter
          Agreement.   RBB Bank acknowledges that  it  bears
          complete responsibility for obtaining adequate tax
          advice regarding the Letter Agreement.

     SEC Filing.
     __________
          RBB  Bank acknowledges that it has been previously
          furnished  with true and complete  copies  of  the
          following documents which have been filed with the
          SEC  pursuant to Sections 13(a), 14(a),  14(c)  or
          15(d) of the Exchange Act, and that such have been
          furnished to RBB Bank a reasonable time  prior  to
          the date hereof: (a) PESI's Form 10-K for the year
          ended December 31, 1999, (b) PESI's Form 10-Q  for
          the  quarter ended March 31, 2000, and (c)  PESI's
          Form 10-Q for the quarter ended June 30, 2000.

     Documents, Information and Access.
     __________________________________
          RBB Bank's decision to purchase the Securities  is
          not  based on any promotional, marketing or  sales
          materials,  and  RBB Bank and its  representatives
          have been afforded, prior to purchase thereof, the
          opportunity  to ask questions of, and  to  receive
          answers from, PESI and its management, and has had
          access to all documents and information which  RBB
          Bank deems material to an investment decision with
          respect to the purchase of Securities hereunder.

     No Registration, Review or Approval
     ____________________________________
                RBB  Bank acknowledges and understands  that
          the   private  offering  and  sale  of  Securities
          pursuant  to  this Letter Agreement has  not  been
          reviewed  or approved by the SEC or by  any  state
          securities commission, authority or agency, and is
          not  registered  under the Securities  Laws.   RBB
          Bank acknowledges, understands and agrees that the
          Shares  are being offered and exchanged  hereunder
          pursuant to a private placement exemption  to  the
          registration  provisions  of  the  Securities  Act
          pursuant  to Section 3(b) and/or Section  4(2)  of
          such   Securities   Act   and/or   Regulation    D
          promulgated under the Securities Act.

     Transfer Restrictions.
     _____________________
         RBB   Bank   will   not  transfer  any   Securities
          purchased under this Letter Agreement unless  such
          Securities  are  registered under  the  Securities
          Laws,  or  unless an exemption is available  under
          such Securities Laws, and PESI may, if it chooses,
          where an exemption from registration is claimed by
          RBB Bank, condition any transfer of Securities out
          of  RBB  Bank's  name upon an  opinion  of  PESI's
          counsel,  to the effect that the proposed transfer
          is being effected in accordance with, and does not
          violate, an applicable exemption from registration
          under  the  Securities  Laws,  or  an  opinion  of
          counsel to RBB Bank, which opinion is satisfactory
          to PESI, to the effect that registration under the
          Securities Act is not required in connection  with
          such sale or transfer and the reasons therefor.

     Reliance.
     _________
          RBB Bank understands and acknowledges that PESI is
          relying   upon   all   of   the   representations,
          warranties,       covenants,       understandings,
          acknowledgments and agreements contained  in  this
          Letter  Agreement in determining whether to accept
          this  subscription  and  to  sell  and  issue  the
          Securities to RBB Bank.

     Accuracy or Representations and Warranties.
     ___________________________________________
                 All  of  the  representations,  warranties,
          understandings and acknowledgments that  RBB  Bank
          has  made  herein  are true  and  correct  in  all
          material  respects  as of the  date  of  execution
          hereof.  RBB Bank will perform and comply fully in
          all  material  respects  with  all  covenants  and
          agreements   set  forth  herein,  and   RBB   Bank
          covenants and agrees that until the acceptance  of
          this  Letter  Agreement by PESI,  RBB  Bank  shall
          inform  PESI immediately in writing of any changes
          in   any  of  the  representations  or  warranties
          provided or contained herein.

                                  -6-
<PAGE>
     Indemnity.
     __________
                RBB Bank hereby agrees to indemnify and hold
          harmless  PESI,  and its successors  and  assigns,
          from,  against and in all respects of any demands,
          claims,  actions or causes of action, assessments,
          liabilities,  losses, costs,  damages,  penalties,
          charges,  fines  or  expenses (including,  without
          limitation, interest, penalties, and attorney  and
          accountants'  fees, disbursements  and  expenses),
          arising  out of or relating to any breach  by  RBB
          Bank of any representations, warranty, covenant or
          agreement   made  by  RBB  Bank  in  this   Letter
          Agreement.  Such right to indemnification shall be
          in  addition to any and all other rights  of  PESI
          under  this Letter Agreement or otherwise, at  law
          or in equity.

     Survival.
     ________
          RBB  Bank  expressly acknowledges and  agrees  that
          all of its representations, warranties, agreements
          and  covenants set forth in this Letter  Agreement
          shall  be of the essence hereof and shall  survive
          the execution, delivery and closing of this Letter
          Agreement,   the   sale  and   purchase   of   the
          Securities, the exercise of the Warrants, and  the
          sale of the Warrant Shares.

Securities Legends and Notices.
_______________________________
     Subscriber  represents and warrants that it  has  read,
considered and understood the following legends, and  agrees
that  such  legends, substantially in the form and substance
set  forth below, shall be placed on all of the certificates
representing  the  Warrants, Warrant  Shares,  and  issuable
shares as indicated:

     Warrant Legends
     _______________
     NEITHER  THIS  WARRANT NOR ANY SHARES OF  COMMON  STOCK
     ISSUABLE  UPON THE EXERCISE OF THIS WARRANT, HAVE  BEEN
     REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED
     (THE  "SECURITIES  ACT") OR QUALIFIED UNDER  APPLICABLE
     STATE  SECURITIES LAWS.  THIS WARRANT  AND  THE  COMMON
     STOCK ISSUABLE UPON EXERCISE OF THIS WARRANT MAY NOT BE
     OFFERED,   SOLD,  PLEDGED,  HYPOTHECATED  OR  OTHERWISE
     TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
     STATEMENT  AND  QUALIFICATION IN  EFFECT  WITH  RESPECT
     THERETO   UNDER  THE  SECURITIES  ACT  AND  UNDER   ANY
     APPLICABLE  STATE SECURITIES LAW OR WITHOUT  THE  PRIOR
     WRITTEN  CONSENT  OF PERMA-FIX ENVIRONMENTAL  SERVICES,
     INC.  (THE  ACOMPANY@) AND AN OPINION OF THE  COMPANY=S
     COUNSEL,  OR  AN  OPINION FROM COUNSEL FOR  THE  HOLDER
     HEREOF,  WHICH OPINION IS SATISFACTORY TO THE  COMPANY,
     THAT   SUCH  REGISTRATION  AND  QUALIFICATION  IS   NOT
     REQUIRED  UNDER APPLICABLE FEDERAL AND STATE SECURITIES
     LAWS OR AN EXEMPTION THEREFROM.

                                -7-
<PAGE>
     NOTWITHSTANDING THE FOREGOING, THE SHARES ISSUABLE UPON
     EXERCISE  ARE  SUBJECT TO THE TERMS SET FORTH  IN  THAT
     CERTAIN    LETTER    AGREEMENT   BETWEEN    RBB    BANK
     AKTIENGESELLSCHAFT AND THE COMPANY, DATED AS OF OCTOBER
     29,  2000,  A COPY OF WHICH IS ON FILE AT THE COMPANY'S
     PRINCIPAL EXECUTIVE OFFICE.

     Warrant Shares and Issuable Shares Legends
     __________________________________________
     THESE  SHARES OF COMMON STOCK, HAVE NOT BEEN REGISTERED
     UNDER  THE  SECURITIES  ACT OF 1933,  AS  AMENDED  (THE
     "SECURITIES  ACT") OR QUALIFIED UNDER APPLICABLE  STATE
     SECURITIES LAWS.  THIS COMMON STOCK MAY NOT BE OFFERED,
     SOLD, PLEDGED, HYPOTHECATED OR OTHERWISE TRANSFERRED IN
     THE  ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AND
     QUALIFICATION IN EFFECT WITH RESPECT THERETO UNDER  THE
     SECURITIES   ACT   AND  UNDER  ANY   APPLICABLE   STATE
     SECURITIES LAW OR WITHOUT THE PRIOR WRITTEN CONSENT  OF
     PERMA-FIX  ENVIRONMENTAL SERVICES, INC. (THE ACOMPANY@)
     AND  AN OPINION OF THE COMPANY=S COUNSEL, OR AN OPINION
     FROM  COUNSEL FOR THE HOLDER HEREOF, WHICH  OPINION  IS
     SATISFACTORY TO THE COMPANY, THAT SUCH REGISTRATION AND
     QUALIFICATION IS NOT REQUIRED UNDER APPLICABLE  FEDERAL
     AND STATE SECURITIES LAWS OR AN EXEMPTION THEREFROM.

     NOTWITHSTANDING THE FOREGOING, THESE SHARES  OF  COMMON
     STOCK  ARE  SUBJECT  TO THE TERMS  SET  FORTH  IN  THAT
     CERTAIN    LETTER    AGREEMENT   BETWEEN    RBB    BANK
     AKTIENGESELLSCHAFT AND THE COMPANY, DATED AS OF OCTOBER
     29,  2000,  A COPY OF WHICH IS ON FILE AT THE COMPANY'S
     PRINCIPAL EXECUTIVE OFFICE.

Miscellaneous.
_____________
     a.   Amendment; Waiver.  Neither this Letter  Agreement
          nor  the  Warrants shall be changed,  modified  or
          amended  in  any  respect  except  by  the  mutual
          written  agreement  of the  parties  hereto.   Any
          provision of this Letter Agreement or the Warrants
          may  be  waived in writing by the party  which  is
          entitled  to the benefits thereof.  No  waiver  of
          any  provision  of  this Letter Agreement  or  the
          Warrants shall be deemed to, or shall constitute a
          waiver  of, any other provision hereof or  thereof
          (whether  or  not  similar), nor  shall  nay  such
          waiver constitute a continuing waiver.

     b.   Binding  Effect; Assignment.  Except as stated  in
          this  Section,  neither this Letter Agreement  nor
          the   Warrants,  nor  any  rights  or  obligations

                                  -8-
<PAGE>
          hereunder  or  thereunder, are assignable  by  RBB
          Bank.   It is understood and acknowledged by  PESI
          that  the Securities shall be held by RBB Bank  as
          agent for certain of its clients who have provided
          to  RBB  Bank  the  $3,000,000 described  in  this
          Letter  Agreement.  Therefore, the Securities  may
          be  proportionately assigned to such  clients  who
          qualify  as  an accredited investor as defined  in
          Rule 501 of Regulation D under the Securities  Act
          of 1933, as amended.

     c.   Governing  Law;  Litigation  Costs.   This  Letter
          Agreement  and  its  validity,  construction   and
          performance  shall be governed in all respects  by
          the internal laws of the State of Delaware without
          giving  effect to such State's conflicts  of  laws
          provisions.

     d.   Counterparts.   This  Letter  Agreement   may   be
          executed  in  one  or more original  or  facsimile
          counterparts,  each of which shall  be  deemed  an
          original and all of which shall be considered  one
          and  the  same agreement, binding on  all  of  the
          parties  hereto, notwithstanding that all  parties
          are not signatories to the same counterpart.  Upon
          delivery of an executed counterpart by RBB Bank to
          PESI,  which in turn is executed and delivered  by
          PESI,  this  Letter Agreement shall be binding  as
          one original agreement between RBB Bank and PESI.

     e.   Entire  Agreement.  This Letter  Agreement,  along
          with  the Warrants, merges and supersedes any  and
          all prior agreements, understandings, discussions,
          assurances,    promises,    representations     or
          warranties among the parties with respect  to  the
          subject  matter  hereof, and contains  the  entire
          agreement  among the parties with respect  to  the
          subject matter set forth herein and therein.

     f.   No   Third   Party  Beneficiaries.   This   Letter
          Agreement  and  the rights, benefits,  privileges,
          interests,  duties  and obligations  contained  or
          referred to herein shall be solely for the benefit
          of  the  parties hereto and no third  party  shall
          have  any rights or benefits hereunder as a  third
          party beneficiary or otherwise hereunder.

             THE NEXT PAGE IS THE SIGNATURE PAGE

      THE REMAINDER OF THIS PAGE IS INTENTIONALLY BLANK

                                 -9-
<PAGE>

                           PERMA-FIX ENVIRONMENTAL
                           SERVICES, INC.

                           By  /s/ Louis Centofanti
                             ______________________________
                                 Dr. Louis F. Centofanti
                                 Chief Executive Officer

Accepted and agreed to by RBB Bank this 29th day of August,
2000.

                           RBB BANK AKTIENGESELLSCHAFT

                           By /s/ Herbert Strauss
                             ______________________________
                                 Herbert Strauss
                                 Headtrader

g:\ball\pesi\rbb loans\3m\letter5.doc

                                  10

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