Exhibit 5.2

                      PURCHASE AND SALE OF ASSETS AGREEMENT

                                     between

                       U S LIQUIDS OF PENNSYLVANIA, INC.,
                     a Pennsylvania corporation, d/b/a EMAX

                                       and

            PERMA-FIX OF PITTSBURGH, INC., a Pennsylvania corporation



                      PURCHASE AND SALE OF ASSETS AGREEMENT

      THIS PURCHASE AND SALE OF ASSETS  AGREEMENT (the  "Agreement") is executed
and  delivered  as of this 23rd day of March  2004,  by and among U S LIQUIDS OF
PENNSYLVANIA,  INC., a  Pennsylvania  corporation,  d/b/a EMAX  ("Seller"),  and
PERMA-FIX OF PITTSBURGH, INC., a Pennsylvania corporation ("Buyer").

                              W I T N E S S E T H:

      WHEREAS,  Seller is the wholly owned  subsidiary  of U S Liquids,  Inc., a
Delaware corporation ("U S Liquids"); and

      WHEREAS,  Seller owns certain,  properties,  equipment and other operating
assets  relating  to its  environmental  and  industrial  maintenance  services,
non-hazardous  liquid  waste  collection  and  processing  and  hazardous  waste
transportation business in Pennsylvania (the "Business"); and

      WHEREAS,  Buyer  desires to purchase and acquire  those assets  associated
with the Business as more  particularly set forth herein,  and Seller desires to
sell such assets to Buyer,  all in accordance  with the terms and conditions set
forth in this Agreement.

      NOW,  THEREFORE,  in  consideration  of the mutual  promises and covenants
contained  in this  Agreement  and other good and  valuable  consideration,  the
receipt and sufficiency of which are acknowledged, the parties agree as follows:

                                    ARTICLE I
                                 Sale of Assets

      Section  1.1  Purchase  and Sale of  Acquired  Assets.  Upon the terms and
subject to the  conditions  set forth in this  Agreement,  at the  Closing,  the
Seller  shall sell,  assign,  transfer,  and convey to the Buyer,  and the Buyer
shall purchase from the Seller, free and clear of all Liens, all rights,  title,
and interest in and to the Acquired Assets. For purposes of this Agreement,  the
term "Liens" means all security  interests,  liens,  mortgages,  deeds of trust,
options, claims, charges, pledges, restrictions, equitable interests, easements,
property rights or encumbrances of any nature.

      Section 1.2 Acquired Assets.  The term "Acquired  Assets" means all right,
title and interest in the  following  assets,  owned  and/or  operated by Seller
and/or used by Seller in the operation of its Business:

            (a) all  equipment  and  machinery  used or for use primarily in the
operations  of the  Business,  including  the  equipment  listed in the attached
Schedule 1.2 (a) (the "Equipment");

            (b) all motor  vehicles  and  other  rolling  stock  used or for use
primarily in the Business  (the  "Rolling  Stock"),  including the Rolling Stock
listed and more  completely  described by  manufacturer,  model number and model
year in the attached Schedule 1.2(b);


                                       1


            (c) to the extent transferable,  all permits, licenses,  franchises,
consents and other  approvals  relating to the operation of the Acquired  Assets
and/or Business,  including,  but not limited to those set forth in the attached
Schedule 1.2(e) (the "Permits");

            (d) all spare  parts,  tires,  and shop  supplies,  relating  to the
Business;

            (e) all  furnishings  and fixtures used or for use in the operations
of the Business,  including the equipment and furnishings listed in the Schedule
1.2(h) (the "Furnishings");

            (f)  to  the  extent   transferable,   all  contractual  rights  and
warranties, relating to the Acquired Assets whether or not in writing, including
those set forth in the attached Schedule 1.2(i) (the "Contractual Rights");

            (g) computer software and programs of Seller; and

            (h) all books and records, files, and other such material (including
electronically  stored  materials)  related  to  each of the  foregoing  and the
Business (the "Books and Records").

      Section  1.3  Excluded  Assets.  The  term  "Excluded  Assets"  means  the
following  assets  owned by Seller:  (a)  accounts  receivable  of  Seller;  (b)
checking  accounts  in the  name  or on  deposit  in the  name  of  Seller;  (c)
inter-company  receivables  and  inter-company  payables;  (d) all contracts and
contract rights and obligations of Seller (whether oral or in writing);  (e) all
customer lists of Seller; (f) all inventory of Seller; (g) all equipment leases,
(h)  all  trademarks,   tradenames,   service  marks,  logos,  patents;   patent
application,  and  tradenames;  (i) all cash and  certificates of deposit in the
name of Seller; (j) all commitments, leases, consents, approvals, franchises and
other  instruments not relating to the Business or the Acquired  Assets,  or not
assignable to Buyer, U S Liquids; and (k) all other assets and property, real or
personal,  tangible or  intangible,  not listed or  referred to in Section  1.2,
above. The Excluded Assets will remain the property of the Seller.

                                   ARTICLE II
                            Payment of Purchase Price

      Section 2.1 Purchase Price. At the Closing,  Buyer shall pay to Seller the
aggregate sum of  $180,000.00  (the  "Purchase  Price").  The Purchase  Price is
payable by a wire transfer made pursuant to the wiring instructions contained in
the attached Schedule 2.1.

      Section 2.2 Assumption of Liabilities. Buyer does not assume, and will not
pay or discharge any of the,  debts,  liabilities and obligations of the Seller,
trade payables arising under the permits, leases and the Business Contracts.


                                       2


      Section 2.3 Seller to Retain all Liabilities, Debts and Obligations. Buyer
is not assuming any debt,  liability or obligation  of Seller,  and Seller shall
retain and,  timely pay,  perform and  discharge,  and Seller  shall  indemnify,
defend and hold harmless Buyer from, all debts,  liabilities  and obligations of
Seller,  whether  or not  relating  to the  Business,  the  Acquired  Assets  or
otherwise, including, but not limited to, the following:

            (a) all  liabilities  and  obligations of Seller with respect to any
claim, demand, cause of action, suit,  proceeding,  judgment,  loss,  liability,
damage or expense  against  Seller,  including all  liabilities  and obligations
under Employee Benefit Plans (as defined in Section 5.1(k),  including,  but not
limited to, the Litigation listed in Schedule 5.1(j) attached hereto;

            (b) all payables, including, but not limited to, trade payables;

            (c) any other debt, liability or obligation of Seller including, but
not  limited  to,  debts,  liabilities  and  obligations  under all of  Seller's
permits, leases and business contracts;

            (d) all  liabilities  and  obligations  to all  employees  of Seller
accrued  since its  inception  through the Closing Date for Seller's  employees,
including  accruals  reflecting  all earned but unpaid  vacations,  holidays and
bonuses;

            (e) all liabilities and obligations  relating to Employee Retirement
Income  Security  Act of 1974,  as amended  ("ERISA"),  with respect to Seller's
employees;

            (f) all income taxes,  payroll taxes,  statutory federal,  state and
local taxes and any taxes which may become due by virtue of a change in Seller's
accounting method;

            (g) all income taxes,  payroll taxes,  statutory federal,  state and
local taxes that Seller may owe  relating to or arising in  connection  with its
business   activities  or  operations  or  as  a  result  of  the   transactions
contemplated by this Agreement;

            (h) all debt and  liabilities  between  Seller and any  Affiliate of
Seller;

            (i) any  environmental or other claims,  demands,  actions,  losses,
judgments,  suits made or arising under any Environmental  Laws, toxic tort laws
or  otherwise  relating  to,  or  involving  or in  connection  with any real or
personal property or events on or prior to the Closing Date;

            (j) any present or future  environmental and/or toxic tort liability
for any past  activities,  past  practices,  or past projects  on-site or on any
customer sites,  which were performed by Seller, any Affiliate of Seller, or any
other companies or subsidiaries acquired, owned, or operated by U S Liquids; and

            (k) all other debts,  liabilities or obligations of Seller, known or
unknown, contingent on absolute or otherwise arising.


                                       3


                                   ARTICLE III
                                     Closing

      Section 3.1 Date and Place of Closing. Unless the parties otherwise agree,
this  transaction  shall be closed when all the  conditions  of this Article III
have been  satisfied  and all  documents  required by this  Agreement  have been
signed and  delivered to the  respective  parties (the  "Closing").  The Closing
shall  take  place at the  offices  of Mayer,  Brown,  Rowe and Maw in  Chicago,
Illinois at 10:00 a.m.,  on March 23, 2004  ("Closing  Date"),  or at such other
time and place mutually agreeable to Buyer and Seller.

      Section 3.2 Conditions to Buyer's Obligation to Close.

            (a) Buyer's  Review of Seller and the Assets.  Buyer shall have from
the date of the execution of this Agreement  until the Closing Date (the "Review
Period")  to  examine,  investigate  and  review (i) the  financial  statements,
balance sheets and books and records of Seller and (ii) the Acquired  Assets for
the purpose of  determining  whether the Business  and the  Acquired  Assets are
suitable for Buyer's  intended use. Seller has provided Buyer with all documents
and materials relating to Seller, the Business and the Acquired Assets which are
in the  possession  and control of Seller,  which are  reasonably  available  to
Seller or Seller's Affiliates, in addition to such documents and materials which
have been  requested  by Buyer.  During the Review  Period,  Buyer,  its agents,
contractors  and  subcontractors  shall  have the  right to enter  upon the Real
Property,  at reasonable  times during ordinary  business hours, to make any and
all inspections and tests as Buyer deems desirable and which may be accomplished
without causing any alteration or material damage to the Acquired Assets. At any
time during the Review  Period,  Buyer may  terminate  this  Agreement,  with or
without cause, by written notice to Seller;

            (b) Approval by Lender.  Buyer's lenders under all credit facilities
shall have been consented to the transactions contemplated by this Agreement;

            (c)  Financing.  Buyer  shall have  secured the funds  necessary  to
enable Buyer to fund the Purchase Price,  with such funding on the terms and the
conditions satisfactory to Buyer in Buyer's sole discretion;

            (d)  Representations  and  Warranties  of  Seller  to  be  True  and
Compliance  With  Covenants.  Except to the  extent  waived in  writing by Buyer
hereunder,  (i) the  representations  and warranties of Seller herein  contained
shall be true in all material  respects on the Closing Date with the same effect
as  though  made  at such  time;  and  (ii)  Seller  shall  have  performed  all
obligations  and  complied  with  all  covenants,  obligations,  and  agreements
required by this  Agreement  to be  performed  or complied  with by Seller on or
prior  to the  Closing  Date.  Seller  shall  also  have  delivered  to  Buyer a
certificate of Seller (in form and substance  satisfactory to Buyer),  dated the
Closing Date and signed by Seller, to both of the aforementioned effects;


                                       4


            (e) Third Party Consents. Seller shall have obtained (i) consents to
the  transactions  contemplated  by  this  Agreement  from  the  parties  to all
contracts, permits, agreements, debt instruments and other documents referred to
in the Schedules  delivered by Seller to Buyer in accordance with this Agreement
or  otherwise,   which  require  such  consents  and  (ii)  consents   from,  or
notification to, all  Governmental  Authorities (as defined below) which require
such  consents  or  notifications.  For  purposes  of the  Agreement,  the  term
"Governmental   Authority"  means  any  agency,   instrumentality,   department,
commission,  court,  tribunal  or board of any  government,  whether  foreign or
domestic and whether national, federal, state, provincial, or local;

            (f) No Material  Adverse  Change.  There shall not have occurred (i)
any  material   adverse  change  since  February  29,  2004,  in  the  business,
properties,  assets,  results of operations or financial condition of Seller, or
(ii) any loss or  damage to any of the  properties  or  assets  (whether  or not
covered  by  insurance)  of Seller  which will  materially  affect or impair the
ability  of  Seller  to  conduct,   after   consummation  of  the   transactions
contemplated hereby, the business of Seller as now being conducted by Seller;

            (g) Statutory Requirements;  Litigation. In a manner satisfactory to
Buyer,   all   authorizations,   consents  and  approvals  of  all  Governmental
Authorities required to be obtained in order to permit consummation by Seller of
the  transactions  contemplated  by this  Agreement  and to permit the  business
presently conducted by Seller to continue unimpaired  immediately  following the
Closing  shall have been  obtained.  Between the date of this  Agreement and the
Closing, no Governmental Authority,  whether federal, state or local, shall have
instituted (or threatened to institute either orally or in a writing directed to
Seller or Seller's  Affiliates) an investigation which is pending on the Closing
relating to this Agreement and the transactions contemplated hereby, and between
the date of this  Agreement and the Closing no action or  proceeding  shall have
been  instituted  or, to the  knowledge  of Seller,  shall have been  threatened
before a court or other governmental body or by any public authority to restrain
or prohibit the transactions contemplated by this Agreement or to obtain damages
in respect thereof;

            (h) Opinions of Delaware  Counsel.  Buyer shall have  received  from
counsel  licensed  and  regularly  practicing  in  the  State  of  Delaware  and
acceptable to Buyer and its counsel, an opinion, dated the Closing Date, stating
that the approval of the  shareholders  of U S Liquid is not required  under the
Delaware   General   Corporation  Law  in  order  to  lawfully   consummate  the
transactions contemplated by this Agreement, in the form reasonably satisfactory
to Buyer and its counsel;

            (i) Environmental Audit. Buyer shall have conducted and completed an
environmental  audit of Seller, and shall have determined to the satisfaction of
Buyer that,  (i) Seller has been and is currently in  compliance in all material
respects with all applicable  Environmental  Laws, except as otherwise disclosed
herein;  (ii) none of the assets  (including,  but not limited to, the soils and
groundwater on or under the Real Property)  owned,  leased,  operated or used by
Seller are  contaminated  with any  hazardous  substance  (as defined in Section
101(14) of CERCLA or any analogous state or local Laws) or petroleum (as defined
in  Subtitle I of RCRA or any  analogous  state or local  Laws) in a manner that
might have a material adverse


                                       5


effect on Seller,  except as otherwise disclosed herein; and (iii) Seller is not
or would not be  subject  to any  liability  in any  material  amount  under any
provision,  or as a result of any past or present  violation,  of any applicable
Environmental  Laws.  For purposes of this  Agreement,  the term  "Environmental
Laws" means any federal or state laws  applicable  to the  Business or Seller in
effect  as of the  date of this  Agreement  and the  Closing  Date  relating  to
Hazardous  Substances (as defined  below) or the  protection of the  environment
under the Comprehensive Environmental Response,  Compensation, and Liability Act
of 1980, 42 U.S.C.  ss.9601 et seq. as amended by the Superfund  Amendments  and
Reauthorization Act ("CERCLA");  the Resource  Conservation and Recovery Act, 42
U.S.C.  ss.6901 et seq.; the Hazardous  Material  Transportation  Act, 42 U.S.C.
ss.1801 et seq.; the Federal Water Pollution  Control Act, 33 U.S.C.  ss.1251 et
seq.; the Toxic Substances Control Act, 15 U.S.C. ss.2601 et seq.; the Clean Air
Act, 42 U.S.C. ss.7401 et seq.; and all analogous laws of the State of Maryland;
each as amended or supplemented as of the date of this Agreement and the Closing
and any rules or  regulations  promulgated  under any of the foregoing as of the
date of this Agreement and the Closing.  The term "Hazardous  Substances"  means
hazardous substances subject to regulation under CERCLA;

            (j) Permits and Licenses.  All permits and licenses (including,  but
not limited to, all permits issued or issuable by Governmental Authorities under
all Environmental Laws) which Buyer deems necessary to conduct Seller's business
after the Closing Date as currently conducted by Seller shall have been duly and
validly  transferred,  or approved  for  transfer to Buyer,  effective  upon the
Closing,  in a manner  satisfactory  to Buyer  by all  appropriate  Governmental
Authorities;

            (k) No Liens on Acquired  Assets.  Seller's debts and obligations to
lenders under all existing credit  facilities  shall have been paid in full, and
such lenders shall have  released all liens and security  interest in and to the
assets of Seller, all in form and substance  satisfactory to Buyer. All Acquired
Assets shall be free and clear of any and all Liens;

            (l)  Financial  Statements.  Buyer  shall  have  received  from  BDO
Siedman,  LLP, a letter  stating that Buyer is not required to provide to and/or
file with, the Securities and Exchange  Commission audited financial  statements
of the Business  pursuant to Rule 3-05 of Regulation  S-X (17 CFR Part 210) as a
result of consummation of this Agreement;

            (m) Good Standing Certificates. Seller shall have delivered to Buyer
good standing and tax certificates (or analogous  documents),  dated as close as
practicable  to  the  Closing,   from  the   appropriate   authorities  in  each
jurisdiction of incorporation of Seller and in each jurisdiction in which Seller
is qualified to do business,  showing  Seller to be in good standing and to have
paid all taxes due in the applicable jurisdiction;

            Closing of A&A Acquisition.  The Buyer shall have acquired, on terms
and conditions  satisfactory  to Buyer,  substantially  all of the assets of USL
Environmental  Services,  Inc., a Maryland corporation,  d/b/a A&A Environmental
("A&A"), which is a wholly owned subsidiary of U S Liquids;


                                       6


            (o) Release. Chaparral Group LLC, Wiley O Orr and William A. Rothrok
shall have executed a release releasing U S Liquids,  the Seller,  the Buyer and
their affiliates from any and all claims,  demands,  liabilities or actions as a
result of or in  connection  with or relating to that  certain  letter of intent
dated November 19, 2003, between Chaparral Group LLC and U S Liquids, more fully
described in that certain  letter dated March 5, 2004, to counsel for the Seller
and Dr. Louis F.  Centofanti  of Perma-Fix  Environmental  Services,  Inc.  from
Slovak  Baron and  Empey  LLP,  with  such  release  containing  such  terms and
provisions that are satisfactory to Buyer.

            (p) Trade Payables. Seller shall have paid all of its trade payables
outstanding as of the Closing Date.

            (q)  Deliveries.  Seller shall have delivered to Buyer the items set
forth as Seller's deliveries in Section 3.4 of this Agreement.

            (r) Lease Payment.  The Buyer shall have received from each landlord
under  the  lease  agreements  described  in  attached  Schedule  8.16 a written
acknowledgment  that all amounts  due and owing by Seller  pursuant to each such
lease have been paid in full as of the Closing Date.

      Section 3.3 Conditions to Seller's Obligation to Close.

            (a)  Approval by  Lenders.  The  execution  of this  Agreement,  and
consummation of the transactions contemplated by this Agreement, shall have been
approved by U S Liquid's lenders under all credit facilities in effect as of the
Closing Date.

            (b)  Deliveries.  Buyer shall have delivered to Seller the items set
forth as Buyer's deliveries in Section 3.5 of this Agreement.

      Section 3.4  Deliveries  by Seller.  At Closing,  Seller shall  deliver to
Buyer, duly executed originals of the following:

            (a) A Bill of Sale for the Acquired Assets, including the Equipment,
Rolling Stock,  Furnishings and Inventory,  in form  substantially  identical to
that set forth in the attached Exhibit A;

            (b)  An  Assignment  and  Assumption   Agreement  for  the  Customer
Accounts,  Permits, accounts receivables,  Business Contracts, and other assets,
in form substantially identical to that set forth in the attached Exhibit B;

            (c) An Assignment and Assumption, Consent to Assignment and Estoppel
Agreement for the Real Estate Lease, in form substantially identical to that set
forth in the attached Exhibit C;

            (d)  A  certified  copy  of  resolutions  of  the  shareholders  and
directors of Seller,


                                       7


in form and substance  satisfactory  to Buyer (i)  authorizing the execution and
delivery of this  Agreement,  the sale of the  Acquired  Assets to Buyer and the
consummation of the transactions contemplated by this Agreement, along with true
and correct copies of the articles of  incorporation  and bylaws of Seller;  and
(ii) an incumbency certificate for the officers of Seller.

            (e) A certificate pursuant to Section 3.2(d).

            (f) The opinions of Delaware counsel pursuant to Section 3.2(h).

            (g) Good standing and tax certificates pursuant to Section 3.4(m).

            (h) If any of the  Acquired  Assets are  encumbered  by any Lien,  a
release of all such Liens in form and substance acceptable to Buyer.

            (i) executed consents to assignment from each of the parties to each
of the Contracts  other than Seller to the extent a consent to the assignment of
such Contract by Seller to Buyer is required by the terms of such Contract or is
otherwise required by law;

            (j) Such other  documents  as are  reasonably  requested by Buyer in
connection with the consummation of the transactions contemplated hereto.

      Section  3.5  Deliveries  by Buyer.  At Closing,  Buyer  shall  deliver to
Seller:

            (a) The  Purchase  Price in cash,  by wire  transfer  to Seller,  as
provided in Section 2.1, above.

            (b) Certified  copies of the  resolutions  of the  shareholders  and
directors of Buyer authorizing the execution and delivery of this Agreement, the
purchase  of the  Acquired  Assets  from  Seller  and  the  consummation  of the
transactions contemplated by this Agreement,  along with true and correct copies
of the articles of incorporation and bylaws of Buyer.

            (c) Such other  documents as are  reasonably  requested by Seller in
connection with the consummation of the transactions contemplated hereto.

                                   ARTICLE IV
                                    Covenants

      Section 4.1  Transition.  Between  the date  hereof and the Closing  Date,
Seller  will not take any  action  designed  or  intended  to have the effect of
discouraging  any customer or business  associate of Seller from maintaining the
same business relationships with Buyer after the Closing that it maintained with
Seller  before the  Closing,  and will use good faith  efforts to preserve  such
customers and business associates.  In addition,  Seller will cause the Business
to be  operated  in its normal  course  from the date of the  execution  of this
Agreement to the Closing Date.

      Section 4.2  Inventory;  Disposal  Responsibility.  Buyer and Seller agree
that any waste


                                       8


materials   stored  at  the  Real   Property   shall  become  the  property  and
responsibility of Buyer at the time of Closing. Seller shall not be obligated to
empty or clean any storage  tanks or dispose of any waste  materials or residual
contents  existing on the Real Property on the Closing Date. Buyer covenants and
agrees that  following  the Closing it will assume full  responsibility  for the
proper  disposal  of any waste  materials  and of any  residual  contents of the
storage tanks then located on the Real Property.

      Section 4.3  Employees.  On or prior to the  Closing  Date,  Seller  shall
terminate  all  of its  employees  associated  with  the  Business  ("Terminated
Employees").  Buyer  shall have the  option,  but not the  obligation,  to offer
employment  to any of the  Terminated  Employees  upon  conditions of employment
established  by Buyer in its sole  discretion.  Seller  shall be liable  for all
liabilities  and  responsible for all obligations to its employees and shall pay
all  expenses  relating  to  Terminated   Employees  through  the  Closing  Date
(including the Closing Date). These expenses shall include,  but are not limited
to, all salary  and  wages,  accrued  vacation  leave,  accrued  personal  days,
commissions,   employee  incentives,  severance  packages,   reimbursements  for
reasonable  and  necessary  business  expenses,  union  dues,  contributions  to
employee  savings  and  pension  plans,  employer  payroll  taxes,  unemployment
compensation  charges,  workers' compensation claims based on injuries initially
occurring  prior to or on the Closing Date  (regardless of the date on which the
claim was filed or whether subsequent injuries occurred), ERISA obligations, and
all similar expenses. The fact that Buyer may offer employment to certain of the
Terminated  Employees and may actually hire certain of the Terminated  Employees
shall not affect Seller's obligations under this Section 4.3.

      Section  4.4  Access  to  Server.  For a period of 90 days  following  the
Closing,  and subject to the terms of the Software  License and Support Services
Agreement,  Buyer shall have right to on-line access to Seller's computer system
server and to the server of U S Liquids for the purpose of facilitating  Buyer's
operation of its intended business which will utilize the Assets.

      Section  4.5 Buyer shall be  responsible  for payment of sales or transfer
taxes required to be paid by the State of  Pennsylvania  in connection  with the
transfer  of  title  from  Seller  to Buyer of the  tangible  personal  property
included in the Acquired Assets.

                                    ARTICLE V
                    Representations and Warranties of Seller

      Section 5.1 Seller represents and warrants to Buyer that as of the Closing
Date:

            (a)  Organization.  Seller is a  corporation  duly  formed,  validly
existing and in good standing  under the laws of the State of  Pennsylvania  and
qualified to conduct the Business in all  jurisdictions in which the Business is
currently being conducted.

            (b)  Authority.  The execution and delivery of this  Agreement,  the
consummation  of the  transactions  contemplated  hereby and the  compliance  by
Seller with the terms of this  Agreement  do not and will not  conflict  with or
result in a breach of any terms of, or


                                       9


constitute a default under,  the Articles of  Incorporation or Bylaws of Seller,
or any  instruments  or other  agreement  to which Seller is a party or by which
Seller  is  bound.  This  Agreement  constitutes  a valid  obligation  of Seller
enforceable  against  Seller in  accordance  with its terms except as limited by
bankruptcy, insolvency,  reorganization or other such laws concerning the rights
of creditors.

            (c) Title to  Acquired  Assets.  At Closing,  title to all  Acquired
Assets shall be good and  marketable,  free and clear of all Liens.  The parties
agree that Buyer shall not assume any  monetary  Lien  relating to any  Acquired
Asset.

            (d) Real Property.  All Real Property  (including  the  improvements
thereon) (i) is in usable  condition,  (ii) is available to Seller for immediate
use in the conduct of the Business,  and (iii) complies in all material respects
with  all  applicable  building  or  zoning  codes  and the  regulations  of any
Governmental  Authority  having  jurisdiction  except for such  noncompliance as
would not have a material adverse effect on the operation of the Business at the
Real Property.(d)

            (e) Financial  Statements.  Except as set forth on Schedule  5.1(e),
all  financial  statements,  balance  sheets  and  other  financial  information
delivered  by Seller to Buyer are true and  accurate  and have been  prepared in
accordance with GAAP, applied on a consistent basis.

            (f) Tax Matters. All tax returns and all similar filings required to
be filed on or before the Closing  Date with  respect to any tax  obligation  of
Seller have been timely filed with the appropriate  governmental agencies in all
jurisdictions  in which such tax returns are required to be filed,  and all such
tax returns  correctly  reflect  the  liability  of Seller for taxes  during the
periods and the events covered by these tax returns.  Further, all taxes payable
with  respect  to these tax  returns  will  have been paid in full  prior to the
Closing  Date or an  adequate  accrual in  accordance  with GAAP shall have been
provided  with respect to these taxes.  No  deficiency  in respect to any taxes,
which  have  been  assessed  against  Seller,  remains  unpaid  and there are no
unassessed  tax  deficiencies  or  any  audits  or  investigations   pending  or
threatened  against  it with  respect  to any taxes.  For the  purposes  of this
Agreement,  the term "taxes" means taxes, duties,  assessments,  fees or levies,
together  with any  interest,  penalties  and  additions to tax,  imposed by any
taxing  authority,   wherever  located  (i.e.  whether  federal,  state,  local,
municipal  or  foreign),  including  without  limitation  all net income,  gross
income,  gross  receipts,  net  receipts,   sales,  use,  transfer,   franchise,
privilege,   profits,  social  security,   disability,   withholding,   payroll,
unemployment,  employment,  excise, severance, real property,  windfall profits,
value added, ad valorem,  occupation or any other similar governmental charge or
imposition.

            (g) No Default Under Business  Contracts.  Seller is not in material
default under any of the Business Contracts.

            (h) Permits.  Seller has all permits  necessary  for or customary in
connection with the operation of the Business.  Seller has delivered to Buyer an
accurate list and summary  description as of the date of this Agreement,  of all
permits,   entitlements,   fuel   permits,   licenses,   franchises   and  other
certificates, owned or held by Seller, to the extent such relate to the Business


                                       10


or operation  thereof,  and all of which are now valid,  in good standing and in
full force and effect. All such permits,  entitlements,  fuel permits, licenses,
franchises  and  certificates  required by law have been  obtained,  are in good
standing and are adequate for the  operation of the  Business.  No third parties
have asserted claims against Seller  alleging that any of such permits,  titles,
fuel permits, licenses, franchises and other certificates infringe on the rights
of said third parties.

            (i) Applicable Laws; Compliance.  Seller is not in default (i) under
any  applicable  federal,   state  or  local  laws,  ordinances  or  regulations
(including, but not limited to all environmental, health and safety laws and the
Americans  with  Disabilities  Act) or (ii)  under  any  order  of any  court or
governmental  administrative  body having  jurisdiction  over  Seller,  the Real
Property, or any related operations or activities. Further, there are no claims,
actions,  suits or  proceedings,  pending or  threatened,  against or  affecting
Seller, the Acquired Assets or the Business at law or in equity, or before or by
any administrative  body having  jurisdiction;  no notice of any claim,  action,
suit or proceeding, whether pending or threatened, has been received; and to the
best of Seller's knowledge, there are no facts or circumstances which would give
rise to the same.

            (j) Litigation. Except as set forth on the attached Schedule 5.1(j),
Seller is not currently a party to, nor has been  threatened  with any lawsuits,
actions or investigations which would adversely affect the Acquired Assets.

            (k) Employee  Benefit Plans.  Except as set forth in the immediately
succeeding  sentence,  Seller  (i)  does  not  now,  and  has  not in the  past,
maintained,  contributed  to or been  required to  contribute  to any  "employee
benefit  plan"  (as  such  term is  defined  in  Section  3(3)  of the  Employee
Retirement  Income  Security Act of 1974,  as amended  ("ERISA"),  or any profit
sharing, deferred compensation, bonus, retirement, severance, health, welfare or
incentive plan or  arrangement  (ii) is not required to contribute to and has no
withdrawal  liability  with  respect to any  "multiemployer  plan" as defined in
Section 414(f) of the Code or ERISA section 3(37) or 4001(a)(3),  (iii) does not
now, and has not in the past,  maintained,  contributed  to or been  required to
contribute  to any plan which is part of a  multiple  employer  plan  within the
remaining of Section 413(c) of the Code or ERISA  sections  4063,  4064 and 4066
and (iv)  does not own any  assets  that are  subject  to any Lien  under  ERISA
section  302(f)  or  Section  412(n) of the  Code.  The  plans and  arrangements
described in this Section  5.15(b) are referred to as "Employee  Benefit Plans."
Set  forth on  Schedule  5.1(k)  is a true,  complete  and  correct  list of all
Employee Benefit Plans that Seller has maintained or to which Seller is required
to contribute and Seller has provided or made available to Buyer true,  complete
and correct copies of all such Employee Benefit Plans.

            (l)  Collective  Bargaining  Agreements.  Except as set forth in the
attached  Schedule  5.1(l),  Seller is not a party to any collective  bargaining
agreements. To the knowledge of Seller, there is no intention on the part of its
employees to seek union representation.

            (m) Violation of Law and  Contamination of Real Property.  Seller is
not in  violation  of any laws,  (including,  but not limited to,  environmental
laws) which  violation  might have a material  adverse effect on the Business or
the Acquired Assets or the financial condition


                                       11


or  operations  of the Business or the Acquired  Assets,  except as disclosed in
Schedule  5.1(m)  attached hereto and none of the Real Property leased by Seller
is  contaminated  or  requires  remediation  of any  kind as a  result  of being
contaminated,  except as disclosed in Schedule 5.1(m).  Seller does not have any
knowledge  of any past,  present,  or future  events,  actions or plans that may
interfere with or prevent full  compliance or continued full compliance with all
laws, or that may be reasonably expected to give rise to any common law or legal
liability  or  otherwise  form the basis of any  claim,  action,  demand,  suit,
proceeding,   hearing,   study  or  investigation  related  to  the  processing,
recycling,   reclamation,   distribution,  use,  treatment,  storage,  disposal,
transport, release or threatened release of any pollutant, contaminant, chemical
or industrial or solid or toxic waste or radioactive materials.

            (n) No  Violation  of  Other  Agreements.  The  consummation  of the
transactions  contemplated  by this  Agreement  and the  operation of a business
enterprise by Buyer similar to the Business  currently  conducted by Seller will
not violate any agreement to which Seller or U S Liquids is a party,  including,
but not limited to, existing covenants-not-to-compete.

      Section 5.2 Disclaimer of Warranties.  Except for the  representations and
warranties of Seller expressly set forth in this Agreement,  (i) Seller makes no
warranties,  express or implied, with respect to the quality,  design,  physical
condition,  fitness  for a  particular  purpose or  capacity  of any of the Real
Property  or the  Acquired  Assets;  (ii) all such  Acquired  Assets  are  being
transferred to the Buyer "AS IS" and "WITH ALL FAULTS" in the condition existing
on the Closing Date; and (iii) SELLER  EXPRESSLY  DISCLAIMS AND NEGATES TO BUYER
AND ALL THIRD PARTIES ANY AND ALL WARRANTIES  CONCERNING  SUCH ACQUIRED  ASSETS,
EXPRESS OR IMPLIED,  BY STATUTE OR  OTHERWISE,  OTHER THAN THOSE  EXPRESSLY  SET
FORTH IN THIS  AGREEMENT,  INCLUDING  WITHOUT  LIMITATION  (A) ANY  WARRANTY  OF
QUALITY,  CONDITION  OR  MERCHANTABILITY;  (B) ANY  WARRANTY  OF  FITNESS  FOR A
PARTICULAR PURPOSE; OR (C) ANY WARRANTY OF HABITABILITY.

      Section 5.3 Survival. Each of the representations and warranties set forth
in this Article V shall survive the Closing and the transfer of the Assets.

                                   ARTICLE VI
                     Representations and Warranties of Buyer

      Section  6.1.  Buyer  represents  and  warrants  to Seller  that as of the
Closing Date:

            (a)  Organization.  Buyer is a corporation  duly organized,  validly
existing and in good standing under the laws of the State of Pennsylvania.


                                       12


            (b)  Authorization.  Buyer has all requisite  power and authority to
enter into this  Agreement,  perform its  respective  obligations  hereunder and
consummate the transactions  contemplated  hereby. The execution and delivery of
this Agreement, the consummation of the transactions contemplated hereby and the
compliance  by  Buyer  with  the  terms  of this  Agreement  do not and will not
conflict  with or result in a breach  of any terms of, or  constitute  a default
under,  Buyer's  Articles of  Incorporation  or Bylaws or any other agreement or
instrument  to which Buyer is a party or by which Buyer is bound.  All necessary
corporate  action has been taken by each Buyer with respect to the execution and
delivery of this Agreement, and this Agreement constitutes a valid obligation of
Buyer  enforceable in accordance with its terms except as limited by bankruptcy,
insolvency,   reorganization  or  other  such  laws  concerning  the  rights  of
creditors.

      Section 6.2.  Disclaimer  of  Warranties.  BUYER  EXPRESSLY  DISCLAIMS AND
NEGATES TO SELLER AND ALL THIRD PARTIES ANY AND ALL WARRANTIES  CONCERNING  SUCH
ACQUIRED  ASSETS,  EXPRESSED  OR IMPLIED,  BY STATUTE OR  OTHERWISE,  OTHER THAN
EXPRESSLY SET FORTH IN THIS AGREEMENT.

      Section 6.3.  Survival.  Each of the  representations  and  warranties set
forth in this  Article VI shall  survive  the  Closing  and the  transfer of the
Assets.

                                   ARTICLE VII
                                 Indemnification

      Section 7.1 Indemnification by Seller. Seller agrees to defend,  indemnify
and  hold  harmless  Buyer,  its  officers,  partners,   managers,   affiliates,
employees,  agents,  and their  successors  and  assigns,  from and  against all
losses, claims, actions, causes of action,  damages,  liabilities,  expenses and
other costs of any kind or amount  whatsoever  (including,  without  limitation,
reasonable  attorneys' fees), whether equitable or legal, matured or contingent,
known or unknown, foreseen or unforeseen,  ordinary or extraordinary,  patent or
latent, which result, either before or after the date of this Agreement, from:

            (a) Any  inaccuracy in or breach of any  representation  or warranty
made by Seller in this Agreement;

            (b) Any  failure of Seller  duly to perform  and  observe  any term,
provision, covenant, agreement or condition under this Agreement;

            (c) Any liability, debt or obligation of the Seller;

            (d) Any claim by a third  party  that,  if true,  would  mean that a
condition for  indemnification set forth in this Section 7.1 had been satisfied;
or,

            (e)  The  inaccuracy  of  or a  material  misrepresentation  in  any
documents provided by Seller to Buyer during Buyer's due diligence investigation
of the Business.

      Buyer shall be deemed to have suffered such loss, claim,  action, cause of
action, damage,


                                       13


liability, expense or other cost, or to have paid or to have become obligated to
pay any sum on account,  of, the matters referred to in subparagraphs  (a) - (e)
of this Section 7.1 if the same shall be suffered,  paid or incurred by Buyer or
any parent, subsidiary, Affiliate, or successor of Buyer.

      Section 7.2  Indemnification by Buyer.  Buyer agrees to defend,  indemnify
and hold harmless  Seller,  its officers,  shareholders,  directors,  divisions,
subdivisions, affiliates, parent, employees, agents, successors, assigns and the
Assets from and against all losses, claims,  actions, causes of action, damages,
liabilities,  expenses  and  other  costs  of  any  kind  or  amount  whatsoever
(including,  without limitation,  reasonable attorneys' fees), whether equitable
or legal,  matured or  contingent,  known or unknown,  foreseen  or  unforeseen,
ordinary or  extraordinary,  patent or latent,  which  result,  either before or
after the date of this Agreement, from:

            (a) Any  inaccuracy in or breach of any  representation  or warranty
made by Buyer in this Agreement;

            (b) Any  failure  of Buyer  duly to perform  and  observe  any term,
provision, covenant, agreement or condition under this Agreement;

            (c) Any  liability of Buyer  imposed upon Seller  arising out of the
conduct of the Business by the Buyer  following  the  Closing,  except for those
obligations which Seller retains under this Agreement; or,

            (d) Any claim by a third  party  that,  if true,  would  mean that a
condition for indemnification set forth in this Section 7.2 had been satisfied.

      Seller shall be deemed to have suffered such loss, claim, action, cause of
action,  damage,  liability,  expense or other cost,  or to have paid or to have
become  obligated  to pay any sum on  account,  of, the  matters  referred to in
subparagraphs (a) - (d) of this Section 7.2 if the same shall be suffered,  paid
or incurred by Seller or any parent,  subsidiary,  Affiliate,  or  successor  of
Seller.  The  amount  of the  loss,  claim,  action,  cause of  action,  damage,
liability,  expense or other cost  deemed to be  suffered,  paid or  incurred by
Seller shall be an amount  equal to the loss,  claim,  action,  cause of action,
damage,  liability,  expense or other cost  suffered,  and/or  incurred  by such
parent, subsidiary, affiliate, or successor.

      Section 7.3 Procedure for  Indemnification.  Promptly after a party hereto
(hereinafter the "Indemnified Party") has received notice of or has knowledge of
any claim by a person  not a party to this  Agreement  ("Third  Person")  or the
commencement  of any action or  proceeding by a Third  Person,  the  Indemnified
Party shall, as a condition precedent to a claim with respect thereto being made
against  any  party  obligated  to  provide  indemnification  pursuant  to  this
Agreement  (hereinafter the "Indemnifying  Party"),  give the Indemnifying Party
written  notice of such claim or the  commencement  of such action or proceeding
(the  "Notice").  The Notice  shall state the nature and the basis of such claim
and a reasonable  estimate of the amount thereof.  The Indemnifying Party, after
receipt of the Notice,  shall  defend and settle,  at its own expense and by its
own counsel, each such matter so long as the Indemnifying Party pursues the same
diligently  and in good  faith  and the claim  does not  involve  injunction  or
equitable relief or involve criminal


                                       14


penalties. The Indemnified Party shall cooperate with the Indemnifying Party and
its  counsel  in  the  defense  thereof  and  in any  settlement  thereof.  Such
cooperation  shall  include,  but  shall  not  be  limited  to,  furnishing  the
Indemnifying Party with any books,  records or information  reasonably requested
by the  Indemnifying  Party that are in the  Indemnified  Party's  possession or
control.  Notwithstanding  the foregoing,  the Indemnified  Party shall have the
right to participate  in any matter  through  counsel of its own choosing at its
own expense, provided that the Indemnifying Party's counsel shall always be lead
counsel and shall  determine all litigation and settlement  steps,  strategy and
the like. After the Indemnifying Party has received the Notice, the Indemnifying
Party  shall not be liable for any  additional  legal  expenses  incurred by the
Indemnified  Party in connection with any defense or settlement of such asserted
liability,  except  to  the  extent  such  participation  is  requested  by  the
Indemnifying  Party, in which event the Indemnified Party shall be reimbursed by
the Indemnifying Party for reasonable  additional legal expenses,  out-of-pocket
and allocable  share of employee  compensation  incurred in connection with such
participation  for  any  employee  whose  participation  is  so  requested.  The
foregoing notwithstanding,  if the Indemnifying Party fails diligently to defend
any such matter to which the  Indemnified  Party is entitled to  indemnification
hereunder or if the claim involves criminal penalties, the Indemnified Party may
undertake  such defense  through  counsel of its choice and at the  Indemnifying
Party's expense.  In each case where the Indemnifying  Party is obligated to pay
the costs and expenses of the Indemnified  Party, the  Indemnifying  Party shall
pay the costs and expenses of the  Indemnified  Party as such costs and expenses
are incurred.  If the Indemnifying  Party desires to accept a final and complete
settlement of any such Third Person claim and the  Indemnified  Party refuses to
consent to such settlement,  then the Indemnifying  Party's liability under this
Section  with  respect to such Third Person claim shall be limited to the amount
so offered in  settlement by said Third Person and the  Indemnified  Party shall
reimburse the  Indemnifying  Party for any additional  costs of defense which it
subsequently incurs with respect to such claim.

      Section  7.4 Sole  Remedy.  Except  in the  case of  fraud or  intentional
misrepresentation,  and except for violations of the  non-competition  agreement
referred to in Section 3.4(b), above,  indemnification  pursuant to this Article
VII is the sole and  exclusive  remedy  of the  parties  after the  Closing  for
matters arising out of the representations, warranties, covenants and agreements
of Seller or Buyer set forth in this Agreement  (without  limiting the rights of
the parties under any other agreement).

                                  ARTICLE VIII
                                     General

      Section 8.1 Further Assurance.  From time to time after the Closing,  each
of the parties will,  without  further  consideration,  execute and deliver such
other instruments of conveyance and transfer,  and take such other action as the
other party may reasonably request: (i) to more effectively convey,  transfer to
and vest in Buyer and to put Buyer in  possession  of the Acquired  Assets to be
transferred  hereunder,  and in the case of contracts and rights,  if any, which
cannot  be  transferred  to Buyer  effectively  without  the  consents  of third
parties,  to  endeavor  to  obtain  such  consents  promptly,   and  if  any  be
unobtainable,  to use  reasonable  efforts  to provide  Buyer with the  benefits
thereof in some other manner; and (ii) to more effectively transfer to


                                       15


Seller the consideration identified herein.

      Section 8.2 Waiver.  Except as otherwise  provided herein,  no delay of or
omission in the exercise of any right,  power or remedy accruing to any party as
a result of any breach or default by any other party under this Agreement  shall
impair any such right, power or remedy, nor shall it be construed as a waiver of
or acquiescence in any such breach or default, or of or in any similar breach or
default occurring later; nor shall any waiver of any single breach or default be
deemed a waiver of any other  breach or default  occurring  before or after that
waiver.

      Section 8.3 Time of the Essence. Time is of the essence of this Agreement.

      Section 8.4 Notice.  All notices or  communications  required or permitted
under this  Agreement  shall be given in writing  and served  either by personal
delivery,  overnight courier or by deposit in the United States mail and sent by
first class  registered or certified  mail,  return receipt  requested,  postage
prepaid:

                  If to the Seller:

                  U S Liquids of Pennsylvania, Inc.
                  411 N. Sam Houston Parkway East, Suite 400
                  Houston, TX  77060
                  Attn: President

                  With a copy to:

                  Law Office of Gary Van Rooyan, P.C.
                  1201 Prince Street
                  Houston, Texas 77008
                  Attn:  Gary J. Van Rooyan

                  If to the Buyer:

                  Perma-Fix of Pittsburg, Inc.
                  1940 N.W. 67th Place
                  Suite A
                  Gainesville, Florida 32653
                  Attn:  Richard T. Kelecy

                  With a copy to:

                  Irwin H. Steinhorn, Esquire
                  Conner & Winters, P.C.
                  211 North Robinson, Suite 1700
                  Oklahoma City, OK  73102


                                       16


      Notice shall be deemed given and effective the day  personally  delivered,
the  day  after  being  sent  by   overnight   courier,   subject  to  signature
verification,  and three days after deposit in the U.S. mail as provided  above,
or when actually received,  if earlier.  Either party may change the address for
notices or communications to be given to it by written notice to the other party
given as provided in this Section.

      Section 8.5 Entire Agreement. This Agreement, the Schedules hereto and the
other  agreements  referred  to  herein  constitute  the  entire  agreement  and
understanding  of the parties with  respect to the subject  matter  hereof,  and
supersede   all   prior   and   contemporaneous   agreements,    understandings,
representations and covenants, oral or written, relative to said subject matter.
Any recitals above, and any exhibits or schedules referred to and/or attached to
this Agreement, are incorporated by reference.

      Section 8.6 Binding  Effect;  Assignment.  This  Agreement and the various
rights and  obligations  arising  hereunder shall inure to the benefit of and be
binding upon the parties hereto and their respective executors,  administrators,
heirs,  legal  representatives,  successors  and  permitted  assigns.  The Buyer
entities may assign their rights in this Agreement, either jointly or severally,
to an entity either  controlled  by the assigning  Buyer entity or controlled by
the principals of the assigning Buyer entity.

      Section  8.7  Expenses  of  Transaction.  Seller  shall  pay all costs and
expenses   incurred  by  Seller  in  connection  with  this  Agreement  and  the
transactions contemplated hereby and thereby, including, without limitation, the
fees and  expenses  of  Seller's  attorneys  and  accountants  and will make all
necessary  arrangements  so that the Acquired Assets will not be charged with or
diminished  by any such cost or expense.  Buyer shall pay all costs and expenses
incurred  by  it  in  connection  with  this  Agreement  and  the   transactions
contemplated  hereby and thereby,  including  without  limitation,  the fees and
expenses of its attorneys and accountants.

      Section 8.8 Broker's  Commission.  Seller represents and warrants to Buyer
and Buyer represents and warrants to Seller that the warranting party has had no
dealing with any dealer, broker or agent so as to entitle such dealer, broker or
agent to a commission or fee in connection  with the sale of the Acquired Assets
to Buyer.  If for any reason any  commission  or fee shall become due, the party
dealing with such dealer,  broker or agent shall pay such  commission or fee and
agrees to indemnify  and save the other party  harmless from all claims for such
commission  or fee and from all  attorneys'  fees,  litigation  costs  and other
expense relating to such claim.

      Section 8.9 Modification;  Remedies Cumulative.  This Agreement may not be
changed,  amended,  terminated,  augmented,  rescinded or otherwise altered,  in
whole or in part,  except by a writing executed by all of the parties hereto. No
right,  remedy or election given by any term of this  Agreement  shall be deemed
exclusive  but each shall be  cumulative  with all other  rights,  remedies  and
elections available at law or in equity.


                                       17


      Section 8.10  Severability.  In case any provision of this Agreement shall
be invalid,  illegal or  unenforceable,  it shall,  to the extent  possible,  be
modified in such manner as to be valid,  legal and enforceable but so as to most
nearly retain the intent of the parties.  If such  modification is not possible,
such  provision  shall be  severed  from  this  Agreement.  In  either  case the
validity,  legality  and  enforceability  of the  remaining  provisions  of this
Agreement shall not in any way be affected or impaired thereby.

      Section  8.11  Governing  Law.  This  Agreement  shall in all  respects be
governed by and construed in  accordance  with the internal laws of the State of
Pennsylvania,  without  giving effect to any choice or conflict of law provision
or rule (whether of the State of  Pennsylvania or any other  jurisdiction)  that
would cause the application of the laws of any jurisdiction other than the State
of Pennsylvania.

      Section 8.12 Counterparts and Facsimile Signatures.  This Agreement may be
executed  simultaneously  in  counterparts,  each of which  shall be  deemed  an
original,  but  all  of  which  shall  together  constitute  one  and  the  same
instrument.  A signature of a party  transmitted by facsimile  shall be as valid
and as binding on the signer as an original signature.

      Section 8.13 Authority.  Each party signing this Agreement on behalf of an
entity  warrants  that he or she has the  authority  to sign on  behalf  of said
entity.

      Section  8.14 Certain  Definitions.  For  purposes of this  Agreement,  in
addition to any other terms defined herein,  the following terms will have their
respective meanings set forth below:

            (a) "Affiliate" means a person that directly or indirectly,  through
one or more  intermediaries,  controls,  or is controlled by, or is under common
control with the person  specified  whether or not such is an  Affiliate  now or
becomes an Affiliate after the date hereof.

            (b) "Control" means the possession, directly or indirectly, alone or
in  concert  with  other,  of the power to direct or cause the  management  of a
person, whether through the ownership of securities, by contract or otherwise.

            (c)  "Person"  means any  individual,  partnership,  joint  venture,
corporation,  trust,  limited liability  company,  unincorporated  organization,
government, or department or agency thereof or other entity.

      Section 8.15 Rules of Construction. Unless otherwise expressly provided in
this  Agreement:  (i)  accounting  terms used in this  Agreement  shall have the
meaning  ascribed to them under U.S.  GAAP;  (ii) words used in this  Agreement,
regardless  of the gender  used,  shall be deemed and  construed  to include any
other gender, masculine, feminine, or neuter, as the context requires; (iii) the
word "including" is not limiting,  and the word "or" is not exclusive;  (iv) the
capitalized term "Section" refers to sections of this Agreement;  (v) references
to a particular  Section include all subsections  thereof;  (vi) references to a
particular  statute or  regulation  include all  amendments  thereto,  rules and
regulations thereunder and any successor statute, rule or


                                       18


regulation, or published clarifications or interpretations with respect thereto,
in each  case as from  time to time in  effect;  (vii)  references  to a  Person
include such  Person's  successors  and assigns to the extent not  prohibited by
this  Agreement;  and (viii)  references to a "day" or number of "days" shall be
interpreted as a reference to a calendar day or number of calendar days.

      Section 8.16 Lease.  Buyer agrees to use  reasonable  efforts to negotiate
(a) a new lease on its behalf with respect to the real  property that is subject
to the leases described in the attached Schedule 8.16 (the "Lease") on terms and
conditions  satisfactory to Buyer and, in connection therewith,  (b) the release
of Seller by the landlord from all payment  obligations  arising under the Lease
which arise on and after the Closing Date. Buyer is not assuming any obligations
or liabilities under the Lease.  Buyer acknowledges that Buyer will be occupying
the premises subject to the Leases immediately after Closing.

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                                       19


      IN WITNESS  WHEREOF,  the parties  hereto have caused this Agreement to be
executed effective as of the day and year first above written.

                                                BUYER:

                                                PERMA-FIX OF PITTSBURG, INC.

                                                By: /s/ Richard T. Kelecy
                                                    -----------------------
                                                Name:  Richard T. Kelecy
                                                Title: Vice President

                                                SELLER:

                                                U S LIQUIDS OF PENNSYLVANIA INC.

                                                By: /s/James Jackson
                                                    -----------------------
                                                Name:  James Jackson
                                                Title: Vice President


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