EXHIBIT 10.8
                                      LEASE

                                 BY AND BETWEEN

                                  MB ASSOCIATES

                                       AND

                BBI - NORTH AMERICAN CLINICAL LABORATORIES, INC.

                             75 NORTH MOUNTAIN ROAD
                            NEW BRITAIN, CONNECTICUT

                            DATED AS OF JULY 28, 1995







                                    CONTENTS
                                    --------


SECTION           CAPTION                                                                                 PAGE
- -------           -------                                                                                 ----
                                                                                                     

1.                Demise - Premises - Term ........................................................................
2.                Rent ............................................................................................
3.                Renewal Options .................................................................................
4.                Construction by the Landlord ....................................................................
5.                Use .............................................................................................
6.                Signs ...........................................................................................
7.                Subordination of Lease ..........................................................................
8.                Quiet Enjoyment .................................................................................
9.                Assignments and Subleases .......................................................................
10.               No Nuisance; Compliance with Laws and Requirements of Public Authorities.........................
11.               Insurance .......................................................................................
12.               Rules and Regulations ...........................................................................
13.               Alterations and Improvements ....................................................................
14.               Tenant's Property ...............................................................................
15.               Tenant's Repairs ................................................................................
16.               Landlord's Repairs, Maintenance, ................................................................
17.               Access to Demised Premises ......................................................................
18.               Damage or Destruction ...........................................................................
19.               Condemnation ....................................................................................
20.               Surrender .......................................................................................
21.               Default and Damages .............................................................................
22.               Parking .........................................................................................
23.               Unperformed Covenants ...........................................................................
24.               Holding Over ....................................................................................
25.               Certain Rights Reserved by the Landlord .........................................................
26.               Waiver of Notice ................................................................................






27.               Notices .........................................................................................
28.               Estoppel Certificate ............................................................................
29.               Limitation of Liability .........................................................................
30.               Rights of Landlord; Non-Waiver ..................................................................
31.               Broker ..........................................................................................
32.               Notice of Lease .................................................................................
33.               Prior Agreements ................................................................................
34.               Captions; Sections; Gender ......................................................................
35.               Benefit and Burden ..............................................................................
36.               Applicable Law ..................................................................................
                  Signatures ......................................................................................



EXHIBITS
- --------
Exhibit A - Plan of Demised Premises
Exhibit B - Schedule of Landlord's Work
Exhibit C - Rules and Regulations








                                      LEASE
                                      -----

         THIS LEASE  made as of the 28th day of July,  1995,  by and  between MB
ASSOCIATES,   a  Connecticut   partnership  having  its  office  at  Plainville,
Connecticut  (the  "Landlord",  and BBI- NORTH AMERICAN  CLINICAL  LABORATORIES,
INC., a Massachusetts  corporation  having an address of 75 North Mountain Road,
New Britain, Connecticut (the "Tenant").

         1.       Demise - Premises - Term.

         (a) The  Landlord  hereby  demises  and leases to the  Tenant,  and the
Tenant  hereby  takes  and hires  from the  Landlord,  for the term  hereinafter
stated,  for  the  rent  hereinafter  reserved,  and  upon  and  subject  to the
covenants,   agreements,   terms,   conditions,   limitations,   exceptions  and
reservations  of this lease,  the building  known as 75 North Mountain Road, New
Britain,  Connecticut,  together  with the exclusive use of the parking area and
land shown and  described in Exhibit A,  attached  hereto and made a part hereof
(the "Demised Premises).

         (b) The term of this lease and the estate hereby granted  (collectively
the "term of this Lease") shall commence on the Commencement Date (as defined in
section  1(c))  and  shall  end on the last day of the  calendar  month in which
occurs the day preceding the fifth (5th)  anniversary of the Commencement  Date,
which ending date, unless the context otherwise requires,  is hereinafter called
the "Expiration  Date", or shall end on such earlier date upon which the term of
this lease may expire or be terminated pursuant to any of the provisions of this
lease or pursuant to law.

         (c) The term  "Commencement  Date:  shall be that date when the Demised
Premises are ready for occupancy by the Tenant, or on August 1, 1995,  whichever
date  shall  occur  later,  and all of the  following  conditions  are met:  (i)
temporary or final  certificate of occupancy  shall have been issued by the City
of New Britain permitting the activities  specified in Section 5 to be conducted
in the Demised Premises;  (ii) the contractor engaged by the Landlord has issued
a certificate  attesting that the  Landlord's  Work (as defined in section 4(b))
has  been  substantially  completed;  and  (iii)  the  Landlord's  Work has been
substantially  completed,  and it shall be deemed to be substantially  completed
notwithstanding  the fact that minor or  insubstantial  details of construction,
mechanical adjustment or decoration remain to be performed, the noncompletion of
which does not interfere  materially  with the Tenant's normal use and occupancy
of the Demised Premises,  provided,  however, that if substantial  completion of
the Landlord's Work shall be delayed beyond July 31, 1995, because of changes in
the  Landlord's  Work at the request of the Tenant as  provided in Section  4(c)
(within  fifteen  (15) days after the delivery of any such change  request,  the
Landlord shall notify the Tenant


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                                       -1-





whether or not such change  request is likely to cause a delay in the completion
of the Landlord's Work beyond July 31, 1995) then the Commencement Date shall be
deemed to be August 1,  1995,  provided  all other  work has been  substantially
completed,  even though the  conditions set forth in this Section 1(c) shall not
have been satisfied.

         2.  Rent.

         (a) The rent reserved under this lease (the "Rent") for the term hereof
shall commence to accrue on the Commencement Date and shall be:



                      
                  (i)      Annual Fixed Rent For the First Year, [Language Deleted Due To Confidential Treatment Request.]

                  (ii)     Annual Fixed Rent For the Second Year, [Language Deleted Due To Confidential Treatment Request.] 

                  (iii)    Annual Fixed Rent For the Third Year, [Language Deleted Due To Confidential Treatment Request.]

                  (iv)     Annual Fixed Rent For the Fourth Year, [Language Deleted Due To Confidential Treatment Request.]

                  (v)      Annual Fixed Rent For the Fifth Year, [Language Deleted Due To Confidential Treatment Request.]

                  (vi)     such  other  sums of money as  shall  become  due and
                           payable by the Tenant to the  Landlord as provided in
                           this lease,  such other sums of money to be deemed to
                           be additional  rent whether or not such sums of money
                           are designated as such hereunder.


         (b) The Rent shall be paid to the Landlord at its address  specified in
Section  27,  or at such  other  place as the  Landlord  may  from  time to time
designate, in lawful money of the United States of America, as and when the same
shall become due and payable and without  abatement or offset and without notice
or demand therefor.

         (c) The annual Fixed Rent for each lease year shall be payable in equal
monthly  installments  in  advance  on the first day of each and every  calendar
month during each lease year. If the  Commencement  Date is other than the first
day of the calendar month, the first monthly installment of the Fixed Rent shall
include  a  pro  rata  installment  of  Fixed  Rent  for  the  period  from  the
Commencement  Date to the last day of the month in which the  Commencement  Date
occurs based upon the Fixed Rent payable during the term hereof.



                                                             Initials
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                                                            _________ (Tenant)



                                       -2-





         (d) If the  Tenant  fails to pay within ten (10) days after the same is
due and payable any  installment of Fixed Rent or any additional rent to be paid
by the Tenant to the  Landlord as provided  in this  lease,  such unpaid  amount
shall bear interest from the due date thereof to the date of payment at the rate
equal to the lesser of (i) twelve  percent (12%) per annum,  or (ii) the maximum
rate  permitted by applicable  law. Such interest shall be paid by the Tenant to
the  Landlord  on the earlier to occur of A) at the time that the Tenant pays to
the Landlord the  installment  of Fixed Rent or the  additional  rent upon which
such  interest  shall have  accrued or (B) five (5) days  after  written  demand
therefor.

         (e) As used  herein,  the term  "lease  year"  shall  mean  the  period
commencing on the  Commencement  Date and ending on the last day of the calendar
month in which  occurs the day  preceding  the first  (1st)  anniversary  of the
Commencement  Date, and each period of twelve (12)  consecutive  calendar months
thereafter.

         (f) If, on the Grand Lists of 10/1/95,  10/1/96,  10/1/97,  10/1/98 and
10/1/99,  as a result of Tenant's use of the Demised  Premises,  the City of New
Britain provides real property tax abatement for the Demised Premises,  the rent
reserved  in Section  2(a),  above,  will be  reduced by an amount  equal to the
amount of tax abatement received, but in no event less than Six Thousand Dollars
($6,000.00) per year for the 2nd through the 5th year of the Term, and the first
year of the first renewal term of this Lease.

         The parties  agree to execute an amendment  to this Lease  establishing
the fixed annual rent in the event of such tax  abatement  and to establish  the
annual fixed rent for the renewal terms set forth in Sections 3 (a) and (b).

         3.       Renewal Options:

         (a) Tenant shall have the option to renew this Lease for a term of five
(5) years on the same terms and  conditions  as provided  herein except that the
annual  fixed rent for each year  during  said first  renewal  term shall be the
greater of (i) [Language Deleted Due To Confidential Treatment Request.] or (ii)
[Language  Deleted Due To Confidential  Treatment  Request.] plus the cumulative
percentage of increase, if any, in the Consumer Price Index All Item Figures for
Urban Wage Earners and Clerical Workers (N.Y.,  Northern N.J., Long Island, N.Y,
NJ,  CT)  (1982-94 = 100)  published  by the  Bureau of Labor  Statistics,  U.S.
Department  of Labor as of the date of the  commencement  of the  first  renewal
period  over the said Index as of the date of the  commencement  of the  initial
term of this Lease,  which  increase shall not exceed  [Language  Deleted Due To
Confidential Treatment Request.].

         (b)  Tenant  shall  have a further  option to renew  this  Lease for an
additional term of five


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                                       -3-



(5) years on the same terms and conditions as provided  herein except that there
shall be no  further  right of renewal  and that the annual  fixed rent for each
year of said second  renewal term shall be the greater of (i) an amount equal to
the annual fixed rent during said first renewal term plus [Language  Deleted Due
To  Confidential  Treatment  Request.] or (ii) the annual fixed rent during said
first renewal term plus the  cumulative  percentage of increase,  if any, in the
Consumer  Price  Index All Item  Figures  for Urban Wage  Earners  and  Clerical
Workers  (N.Y.,  Northern  N.J.,  Long  Island,  N.Y,  NJ,  CT)  (1982-94 = 100)
published by the Bureau of Labor Statistics,  U.S. Department of Labor as of the
date of the  commencement of the second renewal period over the said Index as of
the date of the  commencement  of the first renewal period of this Lease,  which
increase  shall not  exceed  [Language  Deleted  Due To  Confidential  Treatment
Request.].

         (c) The Tenant's right to exercise its options to renew hereunder shall
be  contingent  upon (i) the  Tenant's  giving  to the  Landlord  notice  of the
Tenant's election to exercise its option to renew not later than nine (9) months
prior to the  expiration  date of the initial term or first renewal term, as the
case may be, of this Lease and (ii) the term of this  lease  being in full force
and  effect  on the date  that the  Landlord  receives  notice  of the  Tenant's
election  to  exercise  its  option to renew and on the  expiration  date of the
initial  term or first  renewal  term as the case may be of this lease.  If such
contingencies  shall be  satisfied  in respect to the  exercise of the  Tenant's
options to renew hereunder, then the renewal period shall be added to and become
part of the term of this lease and any  reference in this lease to "term of this
lease";  the "term hereof" or any similar  expression shall be deemed to include
such renewal period.

         (d) If at any time the  Landlord  shall be  restricted  or prevented by
virtue  of any  law,  rule,  regulation  or  order,  such as a  "Wage-Price-Rent
Freeze",  from obtaining the full amount of the Rent for such renewal term, then
on any occasion  upon which it becomes  lawful to obtain and receive the balance
(or any part thereof) of the full rent payable, the Fixed Rent payable hereunder
shall be  increased  by the  maximum  amount  lawful  until the full Fair Market
Rental Value for such renewal period is received by the Landlord.

         (e) A  memorandum  recording  the amount of the rent  payable  for such
renewal period shall be annexed hereto and signed by the Landlord and the Tenant
promptly upon the same being agreed or  determined in accordance  with the terms
hereof.

         4. Construction by the Landlord.

         (a) The Landlord may make such improvements or additions to the Demised
Premises and its  appurtenances  as the  Landlord  shall see fit except that the
Landlord shall secure the prior written  approval of the Tenant,  which approval
shall not be unreasonably withheld or delayed, in the


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                                       -4-




case of any change,  addition or deletion which materially and adversely affects
the  visibility,  access of or to Tenant's  use of the Demised  Premises for the
purposes  set forth in Section 5 or any other  rights of the  Tenant  under this
lease.

         (b) The  Landlord  shall  perform  work and make  installations  in the
Demised  Premises in a good and  workmanlike  manner and in accordance  with the
plans and  specifications  set forth in Exhibit B attached  hereto.  (All of the
work to be performed  by the Landlord  pursuant to this Section 4(b) is referred
to as the "Landlord's Work").

         (c) The Tenant may make written  requests for changes in the Landlord's
Work, and the Landlord shall comply with any such request that in the Landlord's
judgment is not  unreasonable.  Any change in the scope of the  Landlord's  Work
which would  result from such a request and which would  unreasonably  interfere
with or delay the work of the Landlord's  contractors and  subcontractors in the
Demised  Premises or elsewhere in or about the  building  shall be  conclusively
deemed unreasonable.  Any increase in the Landlord's cost of construction of the
Landlord's  Work resulting from such a request shall be  acknowledged in writing
by the Tenant prior to the performance of the change in the Landlord's Work. Any
net increase  arising from all such changes in the Landlord's Work shall be paid
by the Tenant to the Landlord,  as additional  rent,  within ten (10) days after
the Landlord's  written demand.  The Tenant shall not be entitled to any payment
from the Landlord, or to any credit against or reduction in the Rent, on account
of any net decrease arising from all such changes in the Landlord's Work.

         (d) The Tenant, by entering into actual possession of any part or parts
of the Demised Premises, shall be deemed to have agreed that the Landlord, up to
the time of such possession, has performed all of its obligations hereunder with
respect to  preparation  of such part or parts of the Demised  Premises  for the
Tenant's  possession,  except  for (i)  latent  defects  and  (ii)  minor  items
remaining incomplete.  The Tenant, within sixty (60) days after the Commencement
Date,   shall  give  the  Landlord  written  notices  of  any  incomplete  work,
unsatisfactory  conditions or defects,  and the Landlord shall repair or replace
all materials  and  workmanship,  fixtures,  systems,  facilities  and equipment
installed by the Landlord in or serving the Demised  Premises  which prove to be
defective,  and shall prosecute  those items remaining  incomplete to completion
with reasonable diligence.

         5. Use.  The Tenant  shall have the right to occupy and use the Demised
Premises   for   a   medical   laboratory,   clinical   laboratory,   biomedical
manufacturing,  biomedical repository, research and general office purposes, and
the Tenant shall not use or permit the use of the Demised Premises for any other
purpose.



                                                            Initials
                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                       -5-





         6.  Signs.  Unless the  Landlord  shall  have  given its prior  written
consent,  which consent shall not be unreasonably withheld, the Tenant shall not
install,  paint,  inscribe or  maintain  any  lettering,  name,  sign,  business
designation,  advertising  or  publicity  device on the Land or on any  exterior
window or on any other  interior  or  exteriors  portion  of the  building.  All
signage shall be consistent with a comprehensive  sign plan for the planned area
development  of this North  Mountain Road area and is  contingent  upon approval
from all appropriate governmental agencies.

         7. Subordination of Lease.

         Tenant  agrees  that upon the  request of  Landlord  in writing it will
subordinate  this Lease and the lien hereof from time to time to the lien of any
present or future  mortgage to a bank,  insurance  company or similar  financial
institution,  irrespective  of the time of execution or time of recording of any
such mortgage or mortgages,  provided that the holder of any such mortgage shall
enter into an agreement with Tenant,  in recordable  form,  that in the event of
foreclosure  or other  right  asserted  under the  mortgage by the holder or any
assignee  thereof,  this Lease and the rights of Tenant hereunder shall continue
in full force and  effect and shall not be  terminated  or  disturbed  except in
accordance with the provisions of this Lease. Tenant agrees that if requested by
the holder of any such  mortgage it will be a party to said  agreement  and will
agree in  substance  that if the  mortgagee  or any  person  claiming  under the
mortgagee  shall  succeed to the  interest of  Landlord  in this Lease,  it will
recognize  said  mortgagee  or  person as its  landlord  under the terms of this
Lease.  Tenant  agrees  that it will  upon the  request  of  Landlord,  execute,
acknowledge and deliver any and all  instruments  necessary or desirable to give
effect to or notice of such  subordination.  The word  "mortgage" as used herein
includes   mortgages,   deeds  of  trust  or  other  similar   instruments   and
modifications,    consolidations,   extensions,   renewals,   replacements   and
substitutes thereof.

         Such  subordination  agreement  shall  include,  but not be limited to,
statements  that if the lender or ground  lessor  succeeds  to the  interest  of
Landlord under this Lease, lender or ground lessor shall not be:


                  (i)  liable  for any act or  omission  of any  prior  landlord
                  (including  Landlord) except for those acts or omissions which
                  are continuing  after lender succeeds to landlord's  interest;
                  or

                  (ii)subject to any offsets or defenses which Tenant might have
                  against any prior landlord (including Landlord); or



                                                            Initials
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                                       -6-





                  (iii) bound by any rent or additional  rent which Tenant might
                  have  paid  for  more  than the  current  month  to any  prior
                  landlord (including Landlord).

         (b) If, in connection with the procurement, amendment or renewal of any
financing  of the Demised  Premises,  the  mortgagee  shall  request  reasonable
modifications  of this lease as a condition of such financing,  the Tenant shall
not withhold or delay its consent to such  modifications  provided  that they do
not increase the obligations of the Tenant under this lease or adversely  affect
the rights of the Tenant under this lease.

         8. Quiet Enjoyment.  The Landlord  covenants and agrees that so long as
the Tenant pays the Rent and performs the remainder of the Tenant's  obligations
under this lease,  the Tenant shall peaceably and quietly have,  hold, and enjoy
the Demised Premises without  interference by any person claiming by, through or
under the Landlord.

         9. Assignments and Subleases.

         (a) Except as otherwise  provided in this Section 9, the Tenant  agrees
not to assign or in any way  encumber  this  lease,  nor to sublet  the  Demised
Premises,  or any part thereof, nor to permit the Demised Premises,  or any part
thereof,  to be used by others,  without  obtaining the prior written consent of
the Landlord in each instance,  which consent shall not be unreasonably withheld
or delayed.

         (b)  So  long  as no  event  of  default  shall  have  occurred  and be
continuing  hereunder,  the Tenant may assign this lease to any  corporation  or
other entity into which the Tenant may be merged or with which the Tenant may be
consolidated,  or to which all or substantially all of the Tenant's assets shall
be transferred,  provided that such corporation or other entity shall have a net
worth at least  equal to that of the Tenant  immediately  prior to such  merger,
consolidation  or transfer.  The Tenant shall give notice to the Landlord of any
assignment  under  this  Section  9(b),  and shall  deliver to the  Landlord  an
executed counterpart of the instrument effecting such assignment,  together with
an undertaking  by any such  corporation or other entity to agree to be bound by
and to perform all of the Tenant's obligations hereunder.

         (c) (Left Intentionally Blank)

         (d) No  assignment or subletting of this lease shall relieve the Tenant
of any of the Tenant's  obligations under this lease, unless otherwise agreed to
in writing by Landlord.


                                                            Initials
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                                                            _________ (Tenant)



                                       -7-





         (e) Notwithstanding  Subparagraph 9(a) above, until such time as Tenant
is able to  utilize  the  entire  floor  space of the  building  of the  Demised
Premises,  Tenant may sublet that portion of the building  which it does not use
for its business  purposes,  with Landlord's  prior written approval which shall
not be  unreasonably  withheld or delayed,  subject,  however,  to the following
conditions:

         1.  Sublessee shall be of good reputation and financial responsibility.

         2.  Character of business to be conducted  by such  sublessee  shall be
reasonably  acceptable  to Landlord,  and the premises  shall be used only for a
purpose  allowed in Section 5 above and shall be in keeping with the  character,
standing, and quality of the building.

         3. Any assignee or subleasee shall be bound by the terms of this Lease,
including Schedule C hereto.

         4. Tenant shall not be released by reason of such  subletting  from the
due,  prompt,  and  punctual  performance  of all of the terms,  covenants,  and
conditions  contained  in this  lease to be  performed  on its part and from the
payment of the rents and additional rents herein reserved.

         5. Landlord's  consent to such subletting shall not constitute a waiver
of any  provision  of this  agreement  and no further  subletting  shall be made
without  Lessor's  written  consent.  The  sublessee  shall not further  assign,
sublet, or underlet the premises without  Landlord's prior written consent,  and
then only on compliance with all of the provisions contained in this Paragraph.

         10.  No  Nuisance;  Compliance  with  Laws and  Requirements  of Public
Authorities.  The Tenant  agrees (a) not to create or permit any  nuisance in or
about the  Demised  Premises,  (b) to comply  with and conform to (i) all of the
laws and  regulations  of the  State  of  Connecticut,  and  (ii)  the  by-laws,
ordinances,  rules  and  regulations  of the City of New  Britain  so far as the
Tenant's  use of the  Demised  premises  may be  concerned,  and (c) to save the
Landlord harmless from all damages,  fines, penalties and costs for violation of
or non-compliance  by the Tenant or the Tenant's  servants,  employees,  agents,
customers,  invitees, licensees, or visitors with the provisions of this Section
10 and obtain and keep in effect all permits  required by governmental  agencies
for the operation of a medical laboratory,  including, but not limited to, waste
discharge permits from the Connecticut Department of Environmental Protection.

         11.      Insurance.

         (a) At all times  during the term of this  lease,  the  Landlord  shall
insure the building


                                                            Initials
                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                       -8-





against  loss or damage by fire,  and such other  casualties  as may be included
within the extended coverage clauses of policies which are then standard for use
in the State of Connecticut, in such amount as the Landlord in its sole judgment
shall deem appropriate.

         (b) The Tenant shall not commit or permit any violation of the policies
carried by the Landlord  pursuant to Section 11(a),  or do or permit anything to
be done, or keep or permit  anything to be kept, on or in the Demised  Premises,
which, in case of any of the foregoing (i) would result in termination of any of
such policies,  (ii) would  adversely  affect the  Landlord's  right of recovery
under any of such  policies,  or (iii) would  result in the refusal by reputable
and  independent  insurance  companies to insure the building or the property of
the Landlord therein in amounts reasonably  satisfactory to the Landlord. If any
such  action by the  Tenant,  or any  failure by the  Tenant to comply  with the
reasonable requirements of insurance policies with respect to the building or to
perform any of the  Tenant's  obligations  under this  lease,  or the use of the
Demised  Premises by the  Tenant,  shall  result in any  increase in the rate of
premiums  payable with respect to such  policies  carried by the  Landlord,  the
Tenant shall pay to the Landlord, as additional rent, within ten (10) days after
demand therefor,  the resulting  additional  premiums which shall be paid by the
Landlord,  it being  understood  that such  policies  obtained by Landlord  will
permit without extra cost the uses described in Paragraph 5 above.

         (c) At all times  during the term of this lease,  the Tenant  shall (i)
insure the Tenant's  Improvements  (as defined in Section 13), but excluding all
fixtures and real property and the Tenant's  Property (as defined in Section 14)
against  loss or damage by fire and such  other  casualties  as may be  included
within the extended coverage clauses of policies which are then standard for use
in  the  State  of  Connecticut  in  amounts  at all  times  equal  to the  full
replacement value of the Tenant's  Improvements and the Tenant's  Property,  and
(ii) keep in full force and  effect a policy of public  liability  and  property
damage insurance with respect to the Demised Premises, the building and the Land
in  which  the  limits  initially  shall be not less  than One  Million  Dollars
($1,000,000.00)  for each person and Three Million Dollars  ($3,000,000.00)  for
each accident, and in which the limit for property damage initially shall not be
less than Two Hundred Fifty Thousand  Dollars  ($250,000.00),  such limits to be
increased  from  time  to time  as  reasonably  specified  by the  Landlord.  In
addition,  for and  during  any time when the Tenant  shall be  constructing  or
making Tenant's  Improvements,  the Tenant shall keep in full force and effect a
policy  of  completed  value  builder's  risk  insurance  (or an  "installations
floater")  for  the  Demised  Premises,  covering  loss  or  damage  from  fire,
lightning,  extended  coverage,  perils,  vandalism and  malicious  mischief and
perils in an amount not less than the final cost, as reasonably estimated by the
Tenant, of such Tenant's Improvements.

         (d) Each  party  hereto  shall  procure  an  appropriate  clause in, or
endorsement on, each of


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                                       -9-





its  policies  for fire and  extended  coverage  insurance  covering the Demised
Premises,  the  Tenant's  Improvements,  or the  building or personal  property,
fixtures  or  equipment  located  thereon  or  therein,  pursuant  to which  the
insurance  company  waives  subrogation  or  consents  to a  waiver  of right of
recovery  against the other party, and if such a clause or endorsement of waiver
of  subrogation  or consent to a waiver of right of recovery is  obtained,  such
party hereby  agrees that it will not make any claim  against or seek to recover
from the other for any loss or damage to its  property or the property of others
covered by such fire or extended coverage insurance; provided, however, that the
release,  discharge,  exoneration and covenant not to sue herein contained shall
be limited by the terms and  provisions of the waiver of  subrogation  clause or
endorsement  or the  clause or  endorsement  consenting  to a waiver of right of
recovery and shall be co-extensive therewith.

         (e) All  insurance  provided by the Tenant  pursuant to this Section 11
shall be effected  under valid and  enforceable  policies in form and  substance
then  standard in the State of  Connecticut,  issued by  insurers of  recognized
responsibility  licensed to do business  in the State of  Connecticut.  Upon the
Commencement  Date,  and  thereafter not less than thirty (30) days prior to the
expiration  dates of expiring  policies  provided by the Tenant pursuant to this
Section  11, the Tenant  shall  deliver to the  Landlord  copies of  policies or
certificates  with  respect  to the  insurance  being  maintained  by the Tenant
pursuant to the terms of this lease.  All such  policies or  certificates  shall
contain an agreement by the insurers  that such  policies  will not be canceled,
amended or otherwise  modified  without at least thirty (30) days prior  written
notice to the Landlord,  and that the Landlord's rights and interests under such
polices shall not be subject to cancellation by reason of any act or omission of
the Tenant.  All  insurance  policies  provided  by the Tenant  pursuant to this
Section  11 shall  name the  Landlord  and the  Landlord's  mortgage  lenders as
additional insureds as their interests may appear.

         (f) The Tenant shall indemnify and hold the Landlord  harmless  against
and from any liability or expense,  including,  without  limitation,  reasonable
attorney's  fees,  on account of (i) any  accident or injury to the Tenant,  the
Tenant's  servants,  employees,  agents,  customers,   invitees,  licensees,  or
visitors who may be injured or suffer an accident in the Demised Premises unless
the same is caused by the  negligence  or willful  act of the  Landlord,  or the
Landlord's servants, agents or employees, and (ii) the Tenant's activities in or
use of the Demised Premises or elsewhere on the Land or in the building.

         12. Rules and Regulations.  The Tenant and its officers,  employees and
agents  shall  conform  to and aide by such  reasonable  rules and  regulations,
including  those  Rules and  Regulations  as are set forth on Exhibit C attached
hereto,  as shall be established from time to time by the Landlord in connection
with the operation, maintenance, safety and security of the Demised


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                                      -10-





Premises.  The Landlord  shall not be liable to the Tenant for violation of such
rules and regulations by others.

         13.  Alterations and Improvements.

         (a)  The   Tenant   may  make  or  have  made   interior   alterations,
improvements,  decorations, installations and substitutions (collectively called
"Tenant's  Improvements"),  to the Demised  premises  without the prior  written
consent of the Landlord,  but shall make no structural  alterations  or exterior
improvements  or additions  without the prior written  consent of Landlord.  Any
improvements  or  alterations  in  the  Demised  Premises  made  by  the  Tenant
(including, without limitation, permanent partitions, wall paneling and lighting
fixtures,  but excepting the Tenant's Property (as defined in Section 14)) shall
be and remain the  property of the Landlord  and,  except as provided in Section
20,  shall  remain  upon and be  surrendered  with the  Demised  Premises at the
termination  of the term of this  lease.  If the  Landlord  consents to any such
alterations,  improvements  or  additions,  it may impose such  conditions  with
respect thereto as the Landlord reasonably deems appropriate, including, without
limitations,  requiring the Tenant to furnish the Landlord with security for the
payment of all costs to be  incurred  in  connection  with such work,  insurance
against  liabilities which may arise out of such work and plans,  specifications
and permits  necessary  for such work.  Upon  completion of such work the Tenant
shall  deliver to the  Landlord,  if payment is made  directly  to  contractors,
evidence of payment,  contractors'  affidavits and full and final waivers of all
liens for labor, services of materials.

         (b) The Tenant, at its expense, shall obtain all necessary governmental
permits and  certificates  for the  commencement and prosecution of the Tenant's
improvements  (other than the Landlord's  Work) and for final  approval  thereof
upon  completion,  and shall  cause the  Tenant's  Improvements  (other than the
Landlord's Work) to be performed in compliance therewith and with all applicable
laws and  requirements  of  public  authorities,  and in a good and  workmanlike
manner using only good grades of materials.

         (c) The  Tenant's  Improvements  shall not  constitute  the basis for a
claim  against  the  Landlord,  nor a lien or charge upon or against the Demised
Premises,  and if at any time  any such  claim,  lien or  charge  shall be filed
against the Demised Premises,  the Tenant shall cause such claim, lien or charge
to be properly  released of record within  forty-five (45) days after the filing
thereof,  and if the Tenant shall fail to do so, then the Landlord may discharge
the same. The Tenant shall defend, indemnify and save harmless the Landlord from
and  against  any and all such  claims,  liens  and  charges,  and all costs and
expenses,  including  reasonable  attorney's  fees,  incurred by the Landlord in
procuring the discharge of any such claim,  lien or charge or in connection with
any


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                                      -11-




action or proceeding brought thereon.

         (d)  The  Tenant  shall  pay  for  all  materials,  excluding  Tenant's
equipment and personal  property  constituting  Tenant's  Improvements,  and the
Tenant agrees that none of such materials that are incorporated  into and made a
part  of the  building  or  real  estate  shall  be at any  time  subject  to or
encumbered by any lien,  security  interest,  encumbrance,  charge,  installment
sales contract or the interest of any other person,  firm or corporation whether
created voluntarily or involuntarily.

         14. Tenant's Property.

         (a) Except for  Tenant's  Improvements  and those  items  furnished  or
installed by the Landlord as part of the Landlord's  Work as provided in Section
4(b), all movable partitions,  business machinery and equipment,  communications
equipment  and all other  property  which is not  attached  to or built into the
Demised  Premises and which is  installed in the Demised  Premises by or for the
account of the Tenant at its sole expense,  and all furniture,  furnishings  and
other  articles  of  personal  property  owned by the Tenant and  located in the
Demised Premises (all of which are collectively called the "Tenant's Property"),
shall be and shall remain the property of the Tenant, and shall be removed by it
at the termination of the term of this lease. The Tenant shall repair or pay the
cost  of  repairing  any  damage  to the  Demised  Premises  or to the  building
resulting from such removal.

         (b) The Landlord  shall not be liable to the Tenant or any other person
for any loss or damage to the Tenant's Property or the Tenant's Improvements, or
to any  property  of any  other  person,  from  any  cause,  including,  without
limitation,  theft, vandalism, illegal entry, or by steam, gases or electricity,
or by water,  rain or snow,  whether the same may leak into,  issue or flow from
any part of the building, or from the pipes or plumbing work of the building, or
from any other place or quarter,  unless caused by the negligence or willful act
of the Landlord, its servants, agents or employees.

         15. Tenant's Repairs, Cleaning & Utilities.

         (a) Except for the  maintenance  for which the  Landlord  is  expressly
responsible  pursuant to the  provisions  of Section 16, the Tenant  agrees that
throughout the term of this lease,  the Tenant,  at its expense,  shall (i) keep
the  interior  of Demised  Premises in a clean  condition  and in clean and neat
condition,  and (ii) not do or suffer  any  waste,  damage in or to the  Demised
Premises or the Tenant's Improvements.

         (b)  Except  for loss or damage by  reason of the  causes  set forth in
Section 11(a), the


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Tenant shall  reimburse  the Landlord for all costs and expense  incurred by the
Landlord  to repair all damage to the  Demised  Premises as shall be required by
reason of the fault or neglect of the Tenant, or any of its officers, employees,
contractors,  agents or  invitees,  such payment to be made within ten (10) days
after written demand therefor.

         (c) Tenant shall provide its own janitorial services within the Demised
Premises and shall pay for all utility  charges  related to the provision of hot
and cold running water,  electricity,  heat, air conditioning and ventilation in
the building on the Demised  Premises.  At the end of the first Lease year,  the
parties agree to review the costs of janitorial and utility services paid for by
Tenant.  Upon the signing of this Lease, the Tenant has estimated its janitorial
costs to be $7,800.00 per year and Landlord has estimated the utility costs, for
a 5-day,  14-hour per day week,  and a 1/2 day Saturday,  to be  $42,000.00  per
year. If the actual costs for utility  services vary from the above  estimate by
more  than five  percent  (5%),  the  parties  agree to  discuss  in good  faith
modifying the amount of rent payable under this Lease in light of such variance.
The parties shall consider  splitting the cost of purchasing and installing such
energy saving measures as they may mutually agree upon, but are not obligated to
do so.

         16. Landlord's Repairs, Maintenance

         The  Landlord  shall keep,  maintain  and repair the Demised  Premises,
including  without  limitation,   its  fixtures,   appurtenances,   systems  and
facilities,  sidewalks, exterior, roof, structural elements, foundation, parking
lot, exterior lighting and other  appurtenances  thereto,  in good working order
and condition and will obtain and pay for maintenance  service contracts for the
Landlord's systems. The Landlord shall not be required to maintain or repair the
Tenant's Improvements.

         17. Access to Demised Premises.

         (a) The Landlord and the  Landlord's  agents shall have the right,  but
not the obligation,  to enter and pass through the Demised  Premises or any part
or parts  thereof  during  business  hours and at such other times as such entry
shall be required by circumstances  of emergency  affecting the Demised Premises
(i)  to  examine  the  Demised  Premises  and to  show  them  to any  mortgagee,
prospective  mortgagees or purchasers of the Demised Premises,  and (ii) for the
purpose of performing such  maintenance and making such repairs or changes in or
to the Demised Premises or its facilities as may be provided for or permitted by
this lease or as may be mutually  agreed upon by the parties or as the  Landlord
may be  required to make by laws and  requirements  of public  authorities.  The
Landlord  shall be  allowed  to take  all  materials  into and upon the  Demised
Premises that may be required for such repairs, changes or maintenance. Landlord
agrees to abide by Tenant's


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restricted access policies and written safety procedures. Tenant shall cooperate
with  Landlord in making  access  available  consistent  with such  policies and
procedures.

         (b) During the period of six (6) months prior to the  Expiration  Date,
the Landlord may, unless the Tenant shall have  theretofore  given notice to the
Landlord of its election to exercise its option to renew the term of this lease,
exhibit the Demised Premises to prospective tenants.

         18. Damage or Destruction.

         (a) In the  event  that  the  Demised  Premises  (other  than  Tenant's
Improvements),  or any part  thereof,  or access  thereto,  shall be  damaged or
destroyed by fire or other insured  casualty,  but the Tenant shall  continue to
have reasonably  convenient access to the Demised Premises and no portion of the
Demised  Premises (other than Tenant's  Improvements)  shall thereby be rendered
unfit for use and  occupancy by the Tenant for the purposes set forth in Section
5, the Landlord shall promptly and diligently  repair such damage or destruction
(except damage or destruction  to Tenant's  Property or Tenant's  Improvements).
During the period when such repair work is being  conducted,  the Rent shall not
be abated or suspended.

         (b) In the  event  that  the  Demised  Premises  (other  than  Tenant's
Improvements),  or any part thereof,  or access thereto,  shall be so damaged or
destroyed  by fire or other  insured  casualty  that the  Tenant  shall not have
reasonably  convenient  access to the  Demised  Premises  or any  portion of the
Demised Premises (other than Tenant's Improvements),  or so that part of but not
more than 25% of the Demised  Premises' square footage then in use by the Tenant
shall  thereby  be  rendered  unfit for use or  occupancy  by the Tenant for the
purposes set forth in Section 5, and if in Landlord's  determination  reasonably
exercised  the damage or  destruction  may be repaired  within  ninety (90) days
after the  occurrence of the damage or  destruction,  then the Landlord shall so
notify the Tenant within thirty (30) days after the  occurrence of the damage or
destruction and shall promptly and diligently  repair such damage or destruction
(except damage or destruction to Tenant's Property or Tenant's Improvements). In
the event that the Landlord  shall not complete such repairs  within ninety (90)
days after the  occurrence of the damage or  destruction,  then the Tenant shall
have the right to terminate the term of this lease by giving  written  notice of
such  termination  to the  Landlord  within then (10) days after the end of such
ninety (90) day period. If in the Landlord's  determination reasonably exercised
the Demised  Premises  (other than  Tenant's  Improvements),  or means of access
thereto,  cannot be repaired within ninety (90) days after the occurrence of the
damage  or  destruction  or, if more than 25% of the  Demised  Premises'  square
footage then in use by the Tenant should be rendered unfit for use and occupancy
by Tenant,  then either party shall have the right to terminate the term of this
lease by giving written notice of such termination to the other party within the
period


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                                      -14-





of thirty (30) to  forty-five  (45) days after the  occurrence of such damage or
destruction.  If neither  party give such notice of intention  to terminate  the
term of this lease,  then the Landlord shall promptly and diligently  repair the
damage or destruction.

         (c) If any  casualty  results  in the  suspension  of  business  in the
Demised Premises,  all rents and additional charges shall abate from the date of
such suspension of business until the date business is resumed.  If the casualty
or restoration results in a partial suspension of business,  rent and additional
charges shall be equitably  abated during any such period.  If Landlord fails to
begin or complete the restoration  within a reasonable time period,  then Tenant
may, in addition to any other remedies it may have,  perform all or a portion of
such restoration, and Landlord shall pay to Tenant the reasonable costs incurred
by Tenant to restore the Demised Premises.

         (d) In  addition  to and apart from the  foregoing  provisions  of this
Section,  (i) if more than twenty-five  percent (25%) of the Gross Rentable Area
of the Demised  Premises shall be totally or almost totally damaged or destroyed
by fire or other cause at any time during the last six (6) months of the term of
this  lease,  or during  the last six (6)  months of any  renewal  or  extension
thereof,  either the Landlord or the Tenant may terminate the term of this lease
by giving written notice of such  termination to the other party within ten (10)
days  after  the  occurrence  of such  damage  or  destruction,  and (ii) if the
building on the Demised  Premises is damaged or destroyed by fire or other cause
to such extent that the cost of repair the damage or destruction,  as reasonably
estimated by the Landlord,,  will be more than twenty-five  percent (25%) of the
replacement  value of the building  immediately  prior tot he occurrence of such
damage or destruction, then either party may terminate the term of this lease by
giving written notice of such  termination to the Tenant within thirty (30) days
after the occurrence of such damage or destruction.

         (e) Except as provided in this  Section,  no damages,  compensation  or
claim shall be payable by the  Landlord to the  Tenant,  or any other  person by
reason of  inconvenience,  loss of business or annoyance arising from any damage
or destruction, or any repair thereof, as if referred to in this Section.

         19. Condemnation.

         (a) If all of the  building,  or so much of the building or the Demised
Premises as is  necessary  for the  Tenant's  use and  occupancy  of the Demised
Premises for the purposes set forth in Section 5, or for  reasonably  convenient
access to the Demised  Premises,  shall be taken by condemnation or in any other
manner for any public or  quasi-public  use and  purpose,  then the term of this
lease  shall  forthwith  terminate  as of the date  title  vests  in the  taking
authority and the Rent


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shall be apportioned as of such date.

         (b) In addition to and apart from the  foregoing  provisions of Section
20(a), if more than twenty-five  percent (25%) of the Gross Rentable Area of the
building  shall be so taken,  then either party may  terminate  the term of this
lease by giving  written  notice of such  termination to the other within thirty
(30) days after the date title vests in the taking authority.

         (c) The Tenant shall have the exclusive  right in any  proceeding  with
respect to any taking  referred to in this  Section 20 to any award  payable for
the Tenant's  moving expenses and the then value of the Tenant's  Property,  but
the Tenant shall have no other right to any award for either a total taking or a
partial taking of the land, the building or the Demised Premises,  including any
right for the contract value of this lease, and any such award shall be retained
by the Landlord as the Landlord's sole property.

         (d) In the event of any taking  which does not result in a  termination
of the term of this lease,  the Rent shall be equitably  suspended or abated and
the Landlord, at its expense,  shall proceed with reasonable diligence to repair
and restore  the  remaining  part of the  building  and the Demised  Premises to
substantially  its former condition to the extent that the same may be feasible.
Any suspension or abatement of Rent shall cease upon  substantial  completion of
such repairs or restoration.

         20.  Surrender.  On the  Expiration  Date, or on the  expiration of the
final  renewal  period to which the  Tenant  exercises  its  right,  or upon any
earlier  termination  of the  term of this  lease,  the  Tenant  shall  quit and
surrender the Demised Premises, including Tenant's Improvements, to the Landlord
in good order,  condition and repair,  except for (a) Ordinary wear and tear and
(b)  Conditions  requiring  repairs  which  are not  required  to be made by the
Tenant.  The  Tenant  shall  remove  all of the  Tenant's  Property,  and at the
Landlord's request,  shall remove those portions of the Tenant's Improvements as
shall  be  designated  by the  Landlord  for  Tenant's  removal  at the time the
Landlord approves the plans therefor, and shall repair any damage to the Demised
Premises on account of such removal.

         21. Default and Damages.

         (a) Any of the following  occurrences or acts shall constitute an event
of default  under this  lease:  (i)  whenever  the Tenant  shall  default in the
payment of any Rent or any other charge  payable by the Tenant to the  Landlord,
on any day upon which the same is due, and such default shall  continue for five
(5) days after written notice thereof from Landlord; or (ii) whenever the


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Tenant  shall do, or fail to do,  or  permit  to be done,  whether  by action or
inaction, anything contrary to any of the Tenant's obligations hereunder, and if
such situation shall continue and shall not be remedied by the Tenant within

                    (A) Five (5) days after notice in the case of any  voluntary
situation within the Tenant's reasonable control, or

                    (B)  Thirty  (30)  days  in  the  case  of  any  involuntary
situation not within the Tenant's reasonable  control,  after the Landlord shall
have  given to the  Tenant a notice  specifying  the same,  or, in the case of a
situation  which cannot with due  diligence be cured within a period of five (5)
or thirty (30) days, as the case may be, if the Tenant shall not (1) within such
5-day or 30-day period,  as the case may be, advise the Landlord of the Tenant's
intention duly to institute all steps  necessary to remedy such  situation,  and
(2) duly institute  within such 5-day or 30-day period,  as the case may be, and
thereafter diligently prosecute to completion, all steps necessary to remedy the
same;  (iii)  whenever the Tenant is  dissolved  (other than in the contest of a
corporate  reorganization  where the business  enterprise is  continued),  makes
assignment  for  the  benefit  of  creditors,  files  a  voluntary  petition  in
bankruptcy,  is adjudicated a bankrupt or insolvent,  files a petition or answer
seeking   for  the  Tenant   any   reorganization,   arrangement,   composition,
readjustment,  liquidation, dissolution or similar relief under any statute, law
or regulation, files an answer or other pleading admitting or failing to contest
material allegations of a petition filed against the Tenant in any proceeding of
this  nature,  or seeks,  consents to, or  acquiesces  in the  appointment  of a
trustee, receiver, or liquidator of the Tenant or of all or any substantial part
of the  Tenant's  properties;  or (iv) if  within  sixty  (60)  days  after  the
commencement  of any  proceeding  against  the  Tenant  seeking  reorganization,
arrangement,  composition,  readjustment,  liquidation,  dissolution  or similar
relief  under any  statute,  law, or  regulation,  the  proceeding  has not been
dismissed;  or if within  sixty  (60) days  after the  appointment  without  the
Tenant's  consent or acquiescence of a trustee,  receiver,  or liquidator of the
Tenant  or of all or any  substantial  part  of  the  Tenant's  properties,  the
appointment  is not  vacated  or  stayed;  or if within  sixty  (60) days  after
expiration of any such stay, the appointment is not vacated; or (v) the event of
an  occurrence  of default  beyond any  applicable  grace period in that certain
$87,000 Promissory Note from Tenant to Landlord of even date herewith.

         (b) If an event of default shall have happened and be  continuing,  the
Landlord  shall have the  immediate  right at its election (i) to terminate  the
term of this  lease by giving  the  Tenant  not less than five (5) days  written
notice of the  Landlord's  election to  terminate,  and (ii)  whether or not the
Landlord  shall have  terminated the term of this lease pursuant to this Section
21(b), and without demand or notice whatever, to re-enter and take possession of
the Demised  Premises,  removing  all persons and property  therefrom  either by
summary  process  proceedings  or by other action,  without being liable for any
damages therefor.

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                                      -17-





         (c) If the  Landlord  elects to  re-enter  and take  possession  of the
Demised  Premises  pursuant to Section 21 (b),  and whether or not the  Landlord
shall have  terminated  the term of this lease  pursuant to Section 21 (b),  the
Landlord may (but shall be under no obligation  to) re-let the whole or any part
of the  Demised  Premises  on behalf  of the  Tenant  for a period  equal to, or
greater or less than, the remainder of the term of this lease,  at such rent and
upon such terms and conditions as the Landlord shall  determine  reasonable,  to
any tenant the  Landlord  may  consider  suitable and for any use or purpose the
Landlord may deem appropriate in the Demised Premises. The Landlord shall not be
liable for failure to re-let the Demised  Premises,  and the  Landlord  shall be
entitled to receive and retain the rent received upon such  re-letting,  whether
or not such rent is in excess of the Rent.

         (d) Should  Landlord elect to re-enter as herein  provided or should it
take possession pursuant to legal proceedings or pursuant to any notice provided
for by law,  it may either  terminate  this Lease or make such  alterations  and
repairs  as may be  necessary  in order to relet the  premises,  and relet  said
premises  or any part  thereof  for such term or terms  (which may be for a term
extending  beyond the term of this Lease) and at such rental or rentals and upon
such  other  terms  and  conditions  as  Landlord  in its  discretion  may  deem
advisable;  and upon each such  reletting  all rentals  received by the Landlord
from such reletting shall be applied first,  to the payment of any  indebtedness
other than rent due hereunder from Tenant to Landlord; second, to the payment of
any  costs  and  expenses  of  such  reletting,  including  brokerage  fees  and
attorneys' fees and of costs and expenses of such reletting, including the costs
of recovering possession of the Demised Premises,  brokerage fees and attorneys'
fees and of costs of such  alterations and repairs;  third, all utility expenses
and expenses of maintaining the Demised  Premises while vacant,  fourth,  to the
payment of rent due and unpaid hereunder, and the residue, if any, shall be held
by Landlord and applied in payment of future rent as the same may become due and
payable hereunder. If such rentals received from such reletting during any month
be less than that to be paid during that month by Tenant hereunder, Tenant shall
pay any  deficiency to Landlord.  Such  deficiency  shall be calculated and paid
monthly.  No such re-entry or taking  possession of Demised Premises by Landlord
shall be construed  as an election on its part to terminate  this Lease unless a
written  notice of such  intention be given to Tenant or unless the  termination
thereof be decreed by a court of competent jurisdiction.

         22.  Parking.  The Landlord  shall  provide to the Tenant  seventy (70)
parking spaces in the parking area provided and maintained by the Landlord.

         23.  Unperformed  Covenants.   If  the  Tenant  shall  default  in  the
performance of any of the Tenant's obligations hereunder, the Landlord,  without
thereby waiving such default,  may, at the Landlord's  option,  by reason of any
default of the Tenant hereunder, perform the same for the


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                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                





account of the Tenant.  If the  Landlord  makes any  expenditures  or incurs any
obligations for the payment of money,  including attorneys' fees, such sums paid
or obligations incurred shall be paid by the Tenant to the Landlord on the first
day of the  calendar  month next  following  the  rendition to the Tenant of the
Landlord's bill therefor to the Tenant.

         24.  Holding  Over.  The Tenant  shall pay to the Landlord an amount as
Rent equal to one hundred  fifty  percent  (150%) of  one-twelfth  (1/12) of the
Fixed Rent required to be paid by the Tenant  during the previous  Lease Year as
herein  provided  for each month or portion  thereof for which the Tenant  shall
retain  possession  of the  Demised  Premises,  or any part  thereof,  after the
termination  of the term of this lease,  whether by lapse of time or  otherwise,
and also shall pay all damages  sustained  by the  Landlord,  whether  direct or
consequential,  on account thereof.  The provisions of this Section 24 shall not
be deemed to limit or constitute a waiver of any other rights or remedies of the
Landlord  provided herein or at law.  Without limiting any rights or remedies of
the Landlord  resulting by reason of the wrongful holding over by the Tenant, or
creating  any right in the  Tenant to  continue  in  possession  of the  Demised
Premises, all of the Tenant's obligations with respect to the use, occupancy and
maintenance  of the  Demised  Premises  shall  continue  during  such  period of
unlawful retention.

         25.  Certain Rights  Reserved by the Landlord.  The Landlord shall have
the following rights, each of which the Landlord may exercise with notice to the
Tenant but  without  liability  to the Tenant for damage or injury to  property,
person or business on account of the exercise  thereof,  and the exercise of any
such rights shall not be deemed to constitute an eviction or  disturbance of the
Tenant's use or  possession  of the Demised  Premises and shall not give rise to
any claim for set-off or abatement of rent or any other claim, provided that the
Landlord  agrees that in the exercise of such rights it shall not do or cause to
be done  anything  which  is, in any  material  respect,  inconsistent  with the
operation of the Demised Premises as a first-class/laboratory office building:

         (a) To change the building's  street  address,  if required by the U.S.
Postal Service.

         (b) To install,  affix and maintain any and all reasonable  directional
signs on the land of the Demised Premises.

         (c) Upon reasonable notice to Tenant, to make repairs, or improvements,
whether structural or otherwise,  in an about the building, or any part thereof,
and for such purposes to enter upon the Demised Premises, Landlord agrees to use
reasonable  efforts  to cause  minimal  disruption  to the  Tenant's  use of the
Demised Premises.



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                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                
                                      -19-





         (d) The Tenant shall not install or operate machinery or any mechanical
devices of a nature not  directly  related to the  Tenant's  ordinary use of the
Demised Premises without the prior written consent of the Landlord. The Tenant's
movements of property into or out of the building or Demised Premises and within
the building are entirely at the risk and responsibility of the Tenant.

         26. Waiver of Notice. The Tenant hereby waives any notice to quit under
the statutes  relating to summary  process  which,  were it not for this waiver,
might otherwise be necessary in obtaining possession of the Demised Premises.

         27. Notices. Any notice, approval, request, consent, bill, statement or
other communication required or permitted to be given, rendered,  served or made
by either  party  hereto,  shall be in writing and shall be sent by certified or
registered United Stated Mail,  postage prepaid,  return receipt  requested,  or
federal express, or hand delivery or over night carrier:

                  (a)      addressed to the Tenant at:

                           BBI - North American Clinical Laboratories, Inc.
                           C/O Boston Biomedica, Inc.
                           375 West Street
                           West Bridgewater, MA 02379
                           Attn:  Treasurer
                           Fax No.  508-580-1110
                           Telephone No. 508-580-1900

                  (b)      addressed to the Landlord at:

                           MB Associates
                           414 New Britain Road
                           P.O. Box 99
                           Plainville, CT 06062
                           Attn:  Property Management Department
                           Fax No.  203-747-5299
                           Telephone No.  203-229-4853

Either party may, from time to time, by written notice to the other, designate a
different mailing address for notices, bills, statements or other communications
intended for it.


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                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                
                                      -20-





         28. Estoppel  Certificate.  The Tenant shall, from time to time, within
ten (10) days after the Landlord's  written  request,  deliver to the Landlord a
written certificate, in recordable form, ratifying this lease, and stating

         (a) the Commencement Date and the Expiration Date,

         (b)  that  this  lease is in full  force  and  effect  and has not been
assigned, modified, supplemented or amended (except by such writings as shall be
stated),

         (c)  that all  conditions  under  this  lease  to be  performed  by the
Landlord have been satisfied,

         (d) that there are no defenses or offsets  against the  enforcement  of
this lease by the Landlord, or stating those claimed by the Tenant,

         (e) the amount of advance rental, if any (or none if such is the case),
paid by the Tenant,

         (f) the date to which rental has been paid, and

         (g) the  amount of  security  deposited  with the  Landlord,  provided,
however,  that the Tenant shall not be required to make written  declarations as
to any matters  which to its  knowledge  are  inaccurate  or not true.  Any such
certificate  may be relied upon by any  mortgagee of the Land and the  building,
any assignee of such mortgagee,  and any  prospective  purchaser of the Land and
the building. Landlord agrees to provide written confirmation of the Lease terms
and status upon Tenant's written request.

         29.  Limitation  of  Liability.  Anything in this lease to the contrary
notwithstanding,  the Tenant  agrees that it shall look solely to the estate and
property of the  Landlord  in the Demised  Premises  for the  collection  of any
judgment  (or other  judicial  process)  requiring  the  payment of money by the
Landlord in the event of any default or breach by the  Landlord  with respect to
any of the terms,  covenants  and  conditions  of this lease to be  observed  or
performed by the Landlord, and no other assets of the Landlord or of any partner
in the Landlord shall be subject to levy,  execution or other procedures for the
satisfaction of the Tenant's remedies.

         30. Rights of Landlord; Non-Waiver. No right or remedy herein conferred
upon or reserved to the  Landlord is intended to be exclusive of any other right
or remedy, and every right and remedy shall be cumulative and in addition to any
other right or remedy given hereunder or now or


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                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                





hereafter  existing.  The  failure  of the  Landlord  to insist  upon the strict
performance of any provision hereof or to exercise any option,  right,  power or
remedy  contained  herein shall not be  construed as a waiver or  relinquishment
thereof  for  the  future.  Receipt  by the  Landlord  of any  Fixed  Rent,  any
additional rent or any other sum payable  hereunder with knowledge of the breach
of any  provision  hereof  shall not be deemed a waiver of such  breach,  and no
waiver by the Landlord of any provision hereof shall be deemed to have been made
unless  expressed  in writing and signed by the  Landlord.  In addition to other
remedies  provided  herein,  the Landlord  shall be entitled,  to the extent not
prohibited by law, to injunctive  relief in case of the violation,  or attempted
or  threatened  violation,  of any  of the  provisions  hereof,  or to a  decree
compelling  performance of any of the provisions  hereof, or to any other remedy
allowed to the Landlord by law.

         31. Broker.  The Tenant  represents  that no broker or agent other than
Grubb & Ellis  participated  with the  Tenant in this  transaction.  The  Tenant
agrees to indemnify and hold the Landlord harmless from and against any claim or
demand of any other  broker or agent who claims  that he  participated  with the
Tenant in this  transaction.  Landlord  represents  that it has only  dealt with
Grubb & Ellis in connection with this lease.

         32. Notice of Lease.

         (a) This lease shall not be recorded in the New Britain  Land  Records.
Upon the request of either  party,  the other  party  shall  execute a Notice of
Lease, in recordable  form,  satisfying the requirements of Section 47-19 of the
Connecticut General Statutes, Rev. 1958, as amended.

         (b) The parties shall also enter into recordable  supplementary notices
setting forth, among other proper matters, such items as the termination of this
lease and the exercise of any options afforded by this lease.

         33. Prior  Agreements.  This lease and the exhibits and Notice of Lease
constitute the entire  agreement by and between the parties hereto affecting the
Demised  Premises and  supersedes  any and all previous  agreements,  written or
oral, between the parties and affecting the Demised Premises.

         34. Captions; Sections; Gender. The captions contained herein have been
inserted  for  convenience  only and  shall not have the  effect  of  modifying,
amending  or changing  the  express  terms and  provisions  of this  lease.  All
references  to a  "Section"  shall  refer to a Section of this lease  unless the
context otherwise requires. Whenever used, the singular number shall include the
plural,  the  plural  the  singular,  and use of any gender  shall  include  all
genders.


                                                            Initials
                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                
                                      -22-





         35. Benefit and Burden. The covenants, conditions, agreements and terms
of this  lease  shall be  binding  upon and shall  inure to the  benefit  of the
parties hereto and their successors and permitted assigns.

         36.  Applicable  Law.  This Lease shall be governed by and construed in
accordance with the laws of the State of Connecticut.

         37. Signatures. This Lease may be signed in counterparts and any number
of counterparts signed in the aggregate by the parties shall constitute a single
original  document.   Additionally,   a  facsimile  signature  shall  be  deemed
equivalent to an original signature.

         TENANT  ACKNOWLEDGES  THAT THIS LEASE IS A COMMERCIAL  TRANSACTION  AND
THAT IT HAS THE RIGHT UNDER CHAPTER 903a of the  CONNECTICUT  GENERAL  STATUTES,
SUBJECT TO CERTAIN  LIMITATIONS,  TO NOTICE OF, AND HEARING ON, THE RIGHT OF THE
LANDLORD TO OBTAIN A PREJUDGMENT  REMEDY, SUCH AS ATTACHMENT OR GARNISHMENT UPON
COMMENCING ANY LITIGATION AGAINST IT. NOTWITHSTANDING,  TENANT HEREBY WAIVES ALL
RIGHTS TO NOTICE,  JUDICIAL  HEARING OR PRIOR COURT ORDER IN CONNECTION WITH THE
ASSERTION BY THE LANDLORD OF ANY  PREJUDGMENT  REMEDY TO COLLECT THE OBLIGATIONS
OR TO ENFORCE LANDLORDS RIGHTS HEREUNDER.



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                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                






         IN WITNESS WHEREOF, the Landlord and the Tenant have hereunto caused to
be set their hands and seals as of the day and year first above written.

WITNESSES:                                  LANDLORD: MB ASSOCIATES

___________________________                 By_______________________________

___________________________                      A Partner, Duly Authorized

                                             TENANT:  BBI - NORTH
                                             AMERICAN CLINICAL LABORATORIES,
                                             INC.

____________________________                 By_________________________________
                                              Kevin Quinlan
                                              Its Sr. Vice President & Treasurer
____________________________                  Duly Authorized




                                                            Initials
                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                 
                                      -24-





STATE OF CONNECTICUT)
                    )  ss:                                         July 28, 1995
COUNTY OF HARTFORD  )

         Personally  appeared  ____________________,  __________________  of  MB
Associates,  signer and sealer of the foregoing  instrument and acknowledged the
same to be his free act and deed and the free act and deed of said  partnership,
before me.

                                                 -------------------------------
                                                 Commissioner, Superior Court
                                                 Notary Public
                                                 My Commission Expires:

STATE OF                          )
                                  )  ss:                           July 28, 1995
COUNTY OF                         )

         Personally appeared  ____________________,  __________________ of BBI -
North American Clinical  Laboratories,  Inc., signer and sealer of the foregoing
instrument  and  acknowledged  the same to be his free act and deed and the free
act and deed of said corporation, before me.

                                                 -------------------------------
                                                 Commissioner, Superior Court
                                                 Notary Public
                                                 My Commission Expires:



                        GUARANTY OF TENANT'S PERFORMANCE
                        --------------------------------

         In consideration of Landlord's having executed said Lease a the request
of the undersigned and in further  consideration of One Dollar ($1.00) and other
valuable  considerations paid, the receipt whereof is hereby  acknowledged,  the
undersigned  (Guarantor) hereby  unconditionally  guarantees to Landlord and its
successors and assigns,  the payment of the rents and other sums provided for in
said Lease and the  performance  and observance of all agreements and conditions
contained in said Lease on the part of Tenant to be performed or observed.

         Guarantor  hereby waives  presentment for payment,  demand for payment,
notice of  nonpayment or dishonor,  protest and notice of protest,  diligence in
collection, and any and all


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                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                





formalities  which may be legally required to charge it with liability;  and the
Guarantor does further agree that its liability as Guarantor  shall in nowise be
impaired or affected by any renewals,  waivers,  or extensions which may be made
from time to time, with or without its knowledge and consent,  of any default or
the  time of  payment  or  performance  required  under  said  Lease,  or by any
forbearance  or delay in enforcing any obligation  thereof,  or by assignment of
said Lease or subletting of the demised premises,  neglect or refusal to enforce
or to realize  upon any security  which may have been given or may  hereafter be
given  thereunder  or  hereunder,  or by  any  modifications  of  the  terms  or
provisions of the Lease.

         The  Guarantor  further  covenants  and agrees to pay all  expenses and
fees,  including  attorney's  fees which may be incurred by the  landlord or its
successors  and  assigns in  enforcing  any of the terms or  provisions  of this
Guaranty.

         This Guaranty shall be binding upon the successors,  and assigns of the
Guarantors,  shall not be  discharged  or  affected,  in whole or in part by the
bankruptcy, or insolvency of the Tenant.

         This Guaranty is absolute, unconditional, and continuing and payment of
the sums for which the undersigned  become liable shall be made at the office of
the  Landlord or its  successors  or assigns  from time to time on demand as the
same become or are declared due.

         Dated:  July 28, 1995               BOSTON BIOMEDICA, INC.

                                          BY:_____________________________
                                              Kevin Quinlan
                                              Its Sr. Vice President & Treasurer
                                              Duly Authorized


                                                            Initials
                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                
                                      -26-





                                    EXHIBIT A
                                    ---------

                                 LEASED PREMISES


                                  EXHIBIT 'A'

                                LEASED PREMISES


A certain piece or parcel of land with all buildings  and  improvements  thereon
situated  northerly  of  North  Mountain  Road  in  the  City  of  New  Britain,
Connecticut  and being more  particularly  shown on a map entitled  "Map Showing
Location  Of  Proposed  Leasing  Agreement  For  BBI - North  American  Clinical
Laboratories,  Inc. Located At #75 North Mountain Road, New Britain, Connecticut
Map  Prepared  By: MBA  Engineering,  Inc.,  211 New  Britain  Road,  Suite 103,
Kensington,  Connecticut 06037 (203) 827-0222 Job Number: 95068, Scale 1" = 50'
Drawn By: BNB Checked By LJM Date: July 13, 1995" and containing 4.081 +/- acres
and being more particularly bounded and described as follows:

Beginning at a point  located in the westerly line of Lot No. 206 which point is
the southeast corner of the within described premises;  thence running N 89o 07'
53" W.  417.53 feet to a point as shown on said map;  thence  running N 06o 75'
26" E, 66.77 feet to a point as shown on said map; thence running N 31o 03' 55"
W, 35.15 feet to a point as shown on said map;  thence running N 00o 09' 15" W.
276.41 feet,  to a point as shown on said map;  thence  running N 77o 44' 24" E,
291.54 feet,  to a point as shown on said map;  thence  running S 86o 44' 06" E,
152.84 feet to a point as shown on said map;  thence  running S O1o 07' 17" W.
426.62 feet to the point and place of beginning.

Said premises are leased  together with a 30 foot wide  right-of-way  from North
Mountain  Road to the leased  premises,  in common with the Landlord and others,
for motor vehicle and pedestrian ingress and egress.  Said right-of-way is shown
on said map as "Minimum 30 Ft. Wide Driveway  Right-of-Way  From North  Mountain
Road to Leased Portion of Site.  R.O.W. to be centered of 24 Ft. BIT.  Driveway"
and "Minimum 30 Ft. Wide  Right-of-Way From Driveway R.O.W. To Front Entrance of
Site. R.O.W. to be centered over aisle portion of existing BIT. Parking Lot."


                                                            Initials
                                                            _________ (Landlord)
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                                    EXHIBIT B
                                    ---------

                           SCHEDULE OF LANDLORD'S WORK

The  Improvement  list below is a detailed list subject to minor  modifications.
These  "modifications"  must be finalized  immediately.  Both parties understand
that this final plan directly correlates to the Landlord's Performance Schedule.

Improvements

1.  Existing  cafeteria  to be  subdivided  and used as an  employee  lounge and
soundproofed conference room.

2. One existing Lab area,  as specified in the front left area of the  facility,
to be renovated into 3 or 4 offices,  to be located as reasonably  determined by
Tenant.

3.  One  existing  lab  area  to be  refurbished  as a  client  service/specimen
processing, as determined by Tenant.

4. all existing computer and phone wiring to be removed.

5. Floor areas, as designated by Tenant, to be sealed.

6. All carpets, as designated by Tenant, to be replaced.

7. Any damaged ceiling tiles to be replaced.

8. Interior to be cleaned and painted.

9.  Landlord to warrant  that  electrical  systems HVAC and plumbing are in good
working order, including all Emergency Lighting,  exterior  building/parking lot
lighting and the existing security camera in the parking area is operational.

10. New driveway and parking area adjacent to Tenant's building.

11. Lab furniture to be in good working  order as  reasonably  determined by the
parties.



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                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                
12. Landlord to warrant that the electric circuits are fully operational via the
back-up generator or will identify which  circuits/outlets  are operational from
this generator.




                                                            Initials
                                                            _________ (Landlord)
                                                            _________ (Tenant)



                                                                                




                                    EXHIBIT C
                                    ---------

                              RULES AND REGULATIONS


1. The sidewalks, entrances, passages, courts, elevators, vestibules, stairways,
corridors and public parts of the Building shall not be obstructed or encumbered
by Tenant or used by Tenant for any purpose other than ingress and egress to and
from the Demised Premises.

2. No awnings,  air conditioning units or other projections shall be attached to
the outside walls or windowsills  of the Building or otherwise  project from the
Building, without the prior written consent of landlord.

3. All signs or  lettering  affixed by Tenant on any part of the  outside of the
Demised  Premises  shall be approved by landlord,  which  approval  shall not be
unreasonably withheld or delayed.

4. No bottles,  parcels or other articles be placed on the windowsills or in any
other part of the Building,  nor shall any article be thrown out of the doors or
windows of the Demised Premises.

5. Tenant shall not make, or permit to be made, unseemly or disturbing noises or
interfere with other tenants or those having business with them.

6. Tenant  shall not put any covering of any type or nature upon the exterior of
windows in the Demised Premises.



                                                            Initials
                                                            _________ (Landlord)
                                                            _________ (Tenant)