<PAGE>

                            ASSET PURCHASE AGREEMENT

                                 By and Between

                          AMERICAN TOWER SYSTEMS, INC.

                                       and

                           SUBURBAN CABLE TV CO. INC.

                                   Dated as of

                                  July 8, 1997



<PAGE>

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

<S>     <C>                                                                                                      <C>
ARTICLE 1  DEFINED TERMS..........................................................................................1

ARTICLE 2  SALE AND PURCHASE OF ASSETS............................................................................1


                  2.1      Agreement to Sell and Buy..............................................................1
                  2.2      Assumption of Liabilities and Obligations..............................................2
                  2.3      Closing; Purchase Price................................................................4
                  2.4      Accounts Receivable....................................................................5

ARTICLE 3  REPRESENTATIONS AND WARRANTIES OF SELLER...............................................................6


                  3.1      Organization and Business; Power and Authority; Effect of Transaction..................6
                  3.2      Financial and Other Information........................................................7
                  3.3      Changes in Condition...................................................................7
                  3.4      Materiality............................................................................7
                  3.5      Title to Properties; Leases............................................................7
                  3.6      Compliance with Private Authorizations.................................................8
                  3.7      Compliance with Governmental Authorizations and Applicable Law.........................9
                  3.8      Intangible Assets.....................................................................10
                  3.9      Related Transactions..................................................................10
                  3.10     Insurance.............................................................................10
                  3.11     Tax Matters...........................................................................11
                  3.12     Broker or Finder......................................................................11
                  3.13     Employment Arrangements...............................................................11
                  3.14     Material Agreements...................................................................12
                  3.15     Ordinary Course of Business...........................................................12
                  3.16     Material and Adverse Restrictions.....................................................13
                  3.17     Solvency..............................................................................13
                  3.18     Environmental Matters.................................................................13

ARTICLE 4  REPRESENTATIONS AND WARRANTIES OF ATS.................................................................14

                  4.1      Organization and Business; Power and Authority; Effect of Transaction.................14
                  4.2      Broker or Finder......................................................................14
                  4.3      No Legal Action.......................................................................14

ARTICLE 5  COVENANTS.............................................................................................15

                  5.1      Access to Information; Confidentiality................................................15
                  5.2      Agreement to Cooperate................................................................16
                  5.3      Public Announcements..................................................................16
                  5.4      Notification of Certain Matters.......................................................17
                  5.5      No Solicitation.......................................................................17
                  5.6      Conduct of Business by Seller Pending the Closing.....................................17
</TABLE>

                                       -i-

<PAGE>

<TABLE>
<CAPTION>


<S>               <C>                                                                                           <C>
                  5.7      Preliminary Title Reports.............................................................18
                  5.8      Environmental Site Assessments........................................................19
                  5.9      Resolution of Title and Environmental Disapproved Matters.............................20
                  5.10     Post-Closing Covenants and Agreements of the Parties..................................21

ARTICLE 6  CLOSING CONDITIONS....................................................................................21

                  6.1      Conditions to Obligations of Each Party...............................................21
                  6.2      Conditions to Obligations of ATS......................................................22
                  6.3      Conditions to Obligations of Seller...................................................23

ARTICLE 7  TERMINATION, AMENDMENT AND WAIVER.....................................................................25

                  7.1      Termination...........................................................................25
                  7.2      Effect of Termination.................................................................25

ARTICLE 8  INDEMNIFICATION.......................................................................................26

                  8.1      Survival..............................................................................26
                  8.2      Indemnification.......................................................................26
                  8.3      Limitation of Liability...............................................................27
                  8.4      Notice of Claims......................................................................27
                  8.5      Defense of Third Party Claims.........................................................27
                  8.6      Exclusive Remedy......................................................................28

ARTICLE 9  GENERAL PROVISIONS....................................................................................28

                  9.1      Amendment.............................................................................28
                  9.2      Waiver................................................................................28
                  9.3      Fees, Expenses and Other Payments.....................................................28
                  9.4      Notices...............................................................................28
                  9.5      Specific Performance; Other Rights and Remedies.......................................29
                  9.6      Severability..........................................................................29
                  9.7      Counterparts..........................................................................30
                  9.8      Section Headings......................................................................30
                  9.9      Governing Law.........................................................................30
                  9.10     Further Acts..........................................................................30
                  9.11     Entire Agreement......................................................................30
                  9.12     Assignment............................................................................30
                  9.13     Parties in Interest...................................................................30
                  9.14     Mutual Drafting.......................................................................30

APPENDIX A:                Definitions
</TABLE>

SCHEDULES:

         Seller Disclosure Schedule


                                      -ii-

<PAGE>

EXHIBITS:

         EXHIBIT A   Form of Noncompetition Agreement (Section 6.2(j)) 
         EXHIBIT B-1 Forms of Master Lease and Sublease (Section 6.2(l)) 
         EXHIBIT B-2 Form of License Agreement (section 6.2(l))




                                      -iii-

<PAGE>


                            ASSET PURCHASE AGREEMENT

         This Asset Purchase Agreement (this "Agreement") is dated as of July 8,
1997 by and between American Tower Systems, Inc., a Delaware corporation
("ATS"), and Suburban Cable TV Co. Inc., a Pennsylvania corporation ("Seller").

         WHEREAS, Seller, through its Seller Subsidiaries, owns and leases and
operates communication towers and is engaged in the businesses of managing
communication sites for third parties, domestic and international satellite
transmission, and transmitting non-residential third party point-to-point
microwave video and data signals (collectively, the "Seller Business"); and

         WHEREAS, ATS desires to purchase and Seller desires to sell, and to
cause the Seller Subsidiaries to sell, the Seller Assets and the Seller Business
on the terms and conditions hereinafter set forth;

         NOW, THEREFORE, in consideration of the above premises and the
covenants and agreements contained herein, the parties, intending to be legally
bound, do hereby covenant and agree as follows:


                                    ARTICLE 1

                                  DEFINED TERMS
                                  -------------

         As used herein, unless the context otherwise requires, the capitalized
terms defined in Appendix A shall have the respective meanings set forth
therein. Terms defined in the singular shall have a comparable meaning when used
in the plural, and vice versa, and the reference to any gender shall be deemed
to include all genders. Unless otherwise defined or the context otherwise
clearly requires, terms for which meanings are provided in this Agreement shall
have such meanings when used in the Seller Disclosure Schedule and each
Collateral Document executed or required to be executed pursuant hereto or
thereto or otherwise delivered, from time to time, pursuant hereto or thereto.
References to "hereof", "herein" or similar terms are intended to refer to the
Agreement as a whole and not a particular Section, and references to "this
Section" are intended to refer to the entire Section and not a particular
subsection thereof. The term "either party" shall, unless the context otherwise
requires, refer to Seller and ATS.


                                    ARTICLE 2

                           SALE AND PURCHASE OF ASSETS
                           ---------------------------

         2.1 Agreement to Sell and Buy. Subject to the terms and conditions set
forth in this Agreement, Seller hereby agrees to sell, assign, transfer and
deliver, and to cause the Seller Subsidiaries to sell, assign, transfer and
deliver, to ATS at the Closing, and ATS agrees to purchase at the Closing, the
Seller Assets and the Seller Business, free and clear of any Liens of any nature
whatsoever except for Permitted Liens. For purposes of this Agreement, the term
"Seller Assets" shall mean all of the Assets of Seller and the Seller
Subsidiaries, other than the Excluded Assets. For purposes of this Agreement,
the term "Excluded Assets" shall mean the following Assets:

                  (i)  all cash and cash equivalents;


<PAGE>
                  (ii)  all Accounts Receivable;
                                                     
                  (iii) all books and records which Seller or any Seller
         Subsidiary is required by Applicable Law to retain, subject to the
         right of ATS to have access and to copy for a period of three (3) years
         from the Closing Date; the records described herein shall further
         include without limitation all corporate seals, certificates of
         incorporation, minute books, stock books, Tax Returns or other records
         having to do with the corporate organization of Seller and the Seller
         Subsidiaries;

                  (iv) any pension, profit-sharing or employee benefit plans,
         including any assets in any related trusts;

                  (v) the personal assets of the officers, directors,
         shareholders and employees of Seller and the Seller Subsidiaries
         described in Section 2.1 of the Seller Disclosure Schedule;

                  (vi) the assets set forth in Section 2.1 of the Seller
         Disclosure Schedule; and

                  (vii) any and all products, profits and proceeds of, and
         including without limitation any Claims with respect to, any of the
         foregoing.

         2.2      Assumption of Liabilities and Obligations.
                  -----------------------------------------

         (a) At the Closing, ATS shall assume and agree to pay, discharge and
perform the following obligations and liabilities (collectively, the "Seller
Assumed Obligations"): (i) all of the obligations and liabilities of Seller and
the Seller Subsidiaries under the Seller Assumable Agreements, and (ii) all
obligations and liabilities of Seller and the Seller Subsidiaries with respect
to the ownership and operation of the Seller Assets and the conduct of the
Seller Business, on and after the Closing Date; provided, however, that
notwithstanding the foregoing, ATS shall not assume and agree to pay, and shall
not be obligated with respect to, the Seller Nonassumed Obligations.

         (b) ATS shall not assume or become obligated to perform any debt,
liability or obligation of Seller or any of its Subsidiaries relating to any of
the following matters (collectively, the "Seller Nonassumed Obligations"):

                  (i) the ownership or operation of the Seller Assets or the
         conduct of the Seller Business prior to the Closing Date, including
         without limitation Taxes, unfunded pension costs, any Employment
         Arrangement (including without limitation any obligation to any Seller
         Employee for severance benefits, vacation time or sick leave), and any
         of the following to the extent same arise from Events occurring prior
         to the Closing Date: products liability, Legal Actions or other Claims,
         and obligations and liabilities relating to Environmental Law;

                  (ii) any obligations or liabilities under the Seller Assumable
         Agreements relating to the period prior to the Closing Date;

                  (iii) any insurance policies of Seller or any of the Seller
         Subsidiaries;

                  (iv) those required to be disclosed in the Seller Disclosure
         Schedule which are not so disclosed or which, if disclosed, Section
         2.2(b)(iv) of the Seller Disclosure Schedule indicates that such
         obligation or liability will not be assumed;

                                       -2-


<PAGE>

                  (v) any liability or obligation from or relating to breach of
         any warranty or any misrepresentation by Seller under this Agreement or
         of Seller or any of the Seller Subsidiaries under any Collateral
         Document;

                  (vi) any liability or obligation from or relating to breach or
         violation of, or failure to perform, any of the obligations, covenants,
         agreements or undertakings of Seller set forth in this Agreement or of
         Seller or any of the Seller Subsidiaries set forth in any Collateral
         Document, including without limitation Article 5 of this Agreement;

                  (vii) any obligation or liability relating to any Excluded
         Asset;

                  (viii) any obligation or liability with respect to capitalized
         lease obligations (except as otherwise provided in this Agreement) or
         Indebtedness for Money Borrowed;

                  (ix) any Taxes, fees, expenses or other amounts required to be
         paid pursuant to the provisions of this Agreement or any Collateral
         Document by Seller or any of the Seller Subsidiaries; and

                  (x) any Contract between or among Seller and any Affiliate of
         Seller, other than those, if any, set forth in Section 2(b)(x) of the
         Seller Disclosure Schedule.

All Seller Nonassumed Obligations shall remain and be the obligations and
liabilities solely of Seller.

         (c) Anything in this Section or elsewhere in this Agreement to the
contrary notwithstanding, the term "Seller Nonassumed Obligations" shall not
include, and the term "Seller Assumed Obligations" shall include, any liability
arising out of the transfer or assignment to ATS of, or the use or enjoyment of
the benefits by ATS under, any Contract, Governmental Authorization or Private
Authorization the transfer or assignment of which (according to Section 2.2(c)
of the Seller Disclosure Schedule) requires the consent of any Authority or
other Person (collectively, the "Nonassignable Contracts"), if ATS has, on or
prior to the Closing Date, notified Seller in writing (an "Acceptance Notice")
that ATS consents to the transfer or assignment of such Nonassignable Contract
despite the failure or inability of ATS and Seller to obtain the approval or
consent of an Authority or other Person whose approval or consent is required
pursuant to the terms of such Nonassignable Contract, or elects to receive the
benefits of such Nonassumable Contract, in either of which events, if the
approval or consent of an Authority or other Person applicable to transfer of
such Nonassignable Contract is required to be obtained as a condition to ATS'
obligations at Closing pursuant to the provisions of Section 6.1(a) or 6.2(d),
ATS shall be deemed to have waived such condition with respect to such
Nonassignable Contract. With respect to any Nonassignable Contract for which the
applicable consent of any Authority or other Person is not obtained prior to the
Termination Date and for which ATS does not timely deliver an Acceptance Notice
as described in the preceding sentence, Seller and ATS shall enter into an
agreement (the "Nonassignable Contracts Agreement"), pursuant to which (i)
Seller or the applicable Seller Subsidiary will hold and, to the extent
hereinafter provided, perform services thereunder for the account of ATS, and
remit promptly to ATS all amounts received pursuant to the provisions of, all of
the Nonassignable Contracts as to which the required approval or consent to the
assignment or transfer of which was not obtained and as to which ATS has not
delivered an Acceptance Notice, and (ii) ATS will agree to (A) perform, to the
extent the same would not constitute a breach thereof or a constructive
assignment thereof without consent (in which event Seller and the applicable
Seller Subsidiary shall continue to perform), all services required to be
performed under such Nonassignable Contracts, (B) reimburse Seller or the
applicable Seller Subsidiary for all costs and expenses reasonably incurred
pursuant to the Nonassignable Contracts Agreement and 

                                      -3-

<PAGE>

(C) indemnify and hold harmless Seller and the applicable Seller Subsidiary with
respect to all actions taken by ATS thereto and all actions, if any, taken by
Seller or the applicable Seller Subsidiary pursuant thereto other than those
relating to the bad faith, gross negligence or willful misconduct of Seller or
the applicable Seller Subsidiary or its officers, directors, stockholders or
employees.

         (d) Notwithstanding anything contained in this Agreement to the
contrary, except as set forth in Section 2.2(d) of the Seller Disclosure
Schedule, all items of income and expense (including without limitation with
respect to rent, utility charges, Pro Ratable Taxes and wages, salaries and
accrued but unused vacation of Seller employees) arising from the ownership or
operation of the Seller Assets or the conduct of the Seller Business shall be
prorated as of 12:01 a.m., Eastern time, on the Closing Date, with Seller
entitled to and responsible for any such items on or prior to the Closing Date
and ATS entitled to and responsible for any such items relating to any
subsequent period. For these purposes, Pro Ratable Taxes attributable to a
period that begins before and ends after the Closing Date shall be treated on a
"closing of the books" basis as two partial periods, one ending at the close of
the Closing Date and the other beginning on the day after the Closing Date,
except that Pro Ratable Taxes (such as property Taxes) imposed on a periodic
basis shall be allocated on a daily basis. If either party shall have received
any such revenues or paid any such expenses or charges which, pursuant to the
terms hereof, the other party is entitled to or responsible for, it shall
furnish the other party with a detailed statement of any such items as soon as
practicable after receipt or payment thereof. The parties shall use their best
efforts to agree upon such items and other adjustments prior to the Closing Date
and, in any event, except as set forth in Section 2.2(c) of the Seller
Disclosure Schedule, within sixty (60) days thereafter. If the parties are
unable within such period to agree upon such items and other adjustments, Seller
and ATS shall, within the following ten (10) days, jointly designate an
independent public accounting firm to be retained to review such items and other
adjustments. The fees and other expenses of retaining such independent public
accounting firm shall be borne equally by Seller and ATS. Such firm shall report
its conclusions as to such items and other adjustments pursuant to this Section
and such report shall be conclusive on all parties to this Agreement and not
subject to dispute or review. Upon such agreement or determination by such
independent accounting firm, Seller or ATS, as the case may be, shall promptly
and, in any event, within five (5) business days reimburse the other party for
any income received or expenses paid by the other party and not previously
reimbursed or any other adjustment required by this Section.

         Nothing contained in this Section 2.2(d) is intended or shall be deemed
to amend or modify the indemnification provisions of Article 8 nor to reallocate
responsibility for the matters set forth therein.

         2.3 Closing; Purchase Price. The closing of the Transactions (the
"Closing") shall take place at Saul, Ewing, Remick & Saul, 3800 Centre Square
West, Philadelphia, Pennsylvania 19102, at 10:00 a.m., local time, on the later
of (a) October 31, 1997 and (b) the first business day after ten (10) days
following the date all authorizations, consents, waivers, orders and approvals
(and, in the case of Section 6.2(d), modifications) required to be obtained
pursuant to the provisions of Section 6.1(a) and 6.2(d) have been obtained, or
such other date, prior to the Termination Date, as the parties may agree (the
"Closing Date"). At the Closing, each of the parties shall deliver such warranty
deeds, bills of sale, assignments, assumptions of liabilities, opinions and
other instruments and documents as are described in this Agreement or as may be
otherwise reasonably requested by the parties and their respective counsel. The
purchase price for the Seller Assets and the Seller Business (the "Purchase
Price") shall be an amount equal to $70,250,000, subject to adjustment as
provided in Section 2.2(d) plus an amount equal to the Prepaid Expenses and
minus an amount equal to the sum of (a) the Seller Nonassumed Obligations, if
any, which ATS agrees to assume, and (b) Prepaid Revenues. The Purchase Price
shall be payable by wire transfer of immediately available funds to Seller for
the balance of the Purchase Price to such account (or 

                                      -4-
<PAGE>

accounts) as Seller shall designate in written instructions to ATS delivered not
later than two (2) business days prior to the Closing.

         The parties agree that BIA Consulting, Inc. shall promptly conduct and
prior to the Closing complete an appraisal of the Seller Assets which shall be
the basis for an allocation schedule (the "Tax Allocation Schedule") pursuant to
which the Purchase Price shall be allocated among the Seller Assets. Each of
Seller and ATS shall report the purchase and sale of the Seller Assets and the
Seller Business and the other Transactions in accordance with the Tax Allocation
Schedule for purposes of all federal, state and local Tax Returns and shall not
take, and shall cause their respective Affiliates, representatives, successors
and assigns not to take, any position on any federal, state or local Tax Return
or report, inconsistent with such reporting position. Each of Seller and ATS
shall promptly give the other notice of any disallowance of or challenge to such
reporting by any Taxing Authority. Notwithstanding the provisions of this
Section, the parties to this Agreement will rely solely on their own advisors in
determining the tax consequences of the transactions contemplated by this
Agreement and each party is not relying, and will not rely, on any
representations or assurances of any other party regarding such consequences
other than the representations, warranties, covenants and agreements set forth
in writing in this Agreement or furnished pursuant to the provisions hereof.

         2.4 Accounts Receivable. At the closing, Seller and its Subsidiaries
shall appoint ATS its agent for the purpose of collecting all Accounts
Receivable relating to the Seller Business (the "Seller Accounts Receivable").
Seller shall deliver to ATS on or as soon as practicable after the Closing Date
a complete and detailed statement showing the name, amount and age of each
Accounts Receivable. Subject to and limited by the following, revenues relating
to the Seller Accounts Receivable will be for the account of Seller and the
Seller Subsidiaries. ATS shall use the same procedures and efforts which it uses
with respect to its own accounts receivable to collect the Seller Accounts
Receivable for a period of one hundred twenty (120) days after the Closing Date
(the "Collection Period"). Any payment received by ATS during the Collection
Period from any customer with an account which is a Seller Accounts Receivable
shall first be applied in reduction of the Seller Accounts Receivable, unless
the customer contests the validity of such application. During the Collection
Period, ATS shall furnish Seller with a list of, and pay over to Seller, the
amounts collected with respect to the Seller Accounts Receivable on a monthly
basis and forward to Seller, promptly upon receipt or delivery, as the case may
be, copies of all correspondence relating to the Seller Accounts Receivable. ATS
shall provide Seller with a final accounting on or before the fifteenth (15th)
day following the end of the Collection Period. Upon the request of either party
at and after such time, the parties shall meet to mutually and in good faith
analyze any uncollected Seller Accounts Receivable to determine if the same, in
their reasonable business judgment, are deemed to be collectable and if ATS
desires to retain such Seller Accounts Receivable. As to each such Seller
Accounts Receivable, the parties shall negotiate a good faith value of such
Seller Accounts Receivable, which ATS shall pay to Seller if ATS, in its sole
discretion, chooses to retain such Seller Accounts Receivable. Seller shall
retain the right to collect any of the Seller Accounts Receivable as to which
the parties are unable to reach agreement as to a good faith value, and ATS
agrees to turn over to Seller any payments received against any such Seller
Accounts Receivable. ATS shall not be obligated to use any extraordinary efforts
to collect any of the Seller Accounts Receivable assigned to it for collection
hereunder or to refer any of such Seller Accounts Receivable to a collection
agency or to any attorney for collection, and ATS shall not make any such
referral or compromise, nor settle or adjust the amount of any such Seller
Accounts Receivable, except with the approval of Seller. ATS shall not incur any
liability to Seller or any of the Seller Subsidiaries for any uncollected
account unless ATS shall have engaged in willful misconduct or gross negligence
in the performance of its obligations set forth in this Section. During and
after the Collection Period, without specific agreement with ATS to the
contrary, neither Seller nor any of its Subsidiaries nor any of its or their
agents shall make any direct solicitation 

                                      -5-
<PAGE>

of the Seller Accounts Receivable for collection purposes, except for the Seller
Accounts Receivable retained by Seller or any of the Seller Subsidiaries after
the Collection Period.

                                    ARTICLE 3

                    REPRESENTATIONS AND WARRANTIES OF SELLER
                    ----------------------------------------

         Seller hereby represents, warrants and covenants to, and agrees with,
ATS as follows:

         3.1      Organization and Business; Power and Authority; Effect of
                  Transaction.

         (a) Seller and each Seller Subsidiary is a corporation or partnership
duly organized, validly existing and in good standing under the laws of its
jurisdiction of organization, has all requisite power and authority (corporate,
partnership and other) to own or hold under lease its properties and to conduct
its business as now conducted.

         (b) Seller and each Seller Subsidiary has all requisite corporate or
partnership, power and authority and has in full force and effect all
Governmental Authorizations and Private Authorizations, except for those set
forth in Section 3.1(b) of the Seller Disclosure Schedule or those the failure
of which to obtain do not and will not have, individually or in the aggregate,
any material Adverse effect on Seller or any Seller Subsidiary, necessary to
enable it to execute and deliver, and to perform its obligations under, this
Agreement and each Collateral Document executed or required to be executed by it
pursuant hereto or thereto or to consummate the Transactions; and the execution,
delivery and performance of this Agreement and each Collateral Document executed
or required to be executed by it and each Seller Subsidiary pursuant hereto or
thereto have been duly authorized by all requisite corporate, partnership or
other action on the part of Seller and each Seller Subsidiary. This Agreement
has been duly executed and delivered by Seller and each Seller Subsidiary and
constitutes, and each Collateral Document executed or required to be executed by
it pursuant hereto or thereto or to consummate the Transactions when executed
and delivered by Seller and each Seller Subsidiary will constitute, legal, valid
and binding obligations of Seller and each Seller Subsidiary, enforceable in
accordance with their respective terms, except as such enforceability may be
limited by bankruptcy, moratorium, insolvency and similar laws affecting the
rights and remedies of creditors and obligations of debtors generally and by
general principles of equity.

         (c) Except as set forth in Section 3.1(c) of the Seller Disclosure
Schedule, and except for matters which would have no material Adverse effect on
Seller or any Seller Subsidiary, neither the execution and delivery by Seller
and each Seller Subsidiary of this Agreement or any Collateral Document executed
or required to be executed by it pursuant hereto or thereto, nor the
consummation by Seller and each Seller Subsidiary of the Transactions, nor
compliance with the terms, conditions and provisions hereof or thereof by Seller
and each Seller Subsidiary:

                  (i) will conflict with, or result in a breach or violation of,
         or constitute a default under, any Organic Document of Seller or any
         Seller Subsidiary or any Applicable Law, or will conflict with, or
         result in a breach or violation of, or constitute a default under, or
         permit the acceleration of any obligation or liability in, or but for
         any requirement of giving of notice or passage of time or both would
         constitute such a conflict with, breach or violation of, or default
         under, or permit any such acceleration in, any Contractual Obligation
         of Seller or any Seller Subsidiary, other than those constituting
         Seller Nonassumed Obligations; or

                                      -6-

<PAGE>

                  (ii) will require Seller to make or obtain any Governmental
         Authorization, Governmental Filing or Private Authorization including
         without limitation under the FCA, except for filings under the
         Hart-Scott-Rodino Act and the filings described in Section 3.1(c) of
         the Seller Disclosure Schedule.

         (d) Seller and the Seller Subsidiaries are the only Persons which own
or have owned any interest in any of the Seller Assets or any aspect of the
Seller Business other than those set forth on Section 3.1(d) of the Seller
Disclosure Schedule.

         3.2 Financial and Other Information.. Seller has heretofore furnished
to ATS copies of the financial statements of the Seller Business listed in
Section 3.2 of the Seller Disclosure Schedule (the "Seller Financial
Statements"). The Seller Financial Statements, including in each case the notes
thereto, have been prepared in accordance with GAAP applied on a consistent
basis throughout the periods covered thereby, except as otherwise noted therein
or as set forth in Section 3.2 of the Seller Disclosure Schedule, are true,
accurate and complete in all material respects, do not contain any untrue
statement of a material fact or omit to state a material fact required by GAAP
to be stated therein or necessary in order to make the statements contained
therein not misleading, and fairly present the financial condition and the
results of operations and cash flow of the Seller Business, on the bases therein
stated, as of the respective dates thereof, and for the respective periods
covered thereby subject, in the case of unaudited financial statements, to
normal nonmaterial year-end audit adjustments and accruals.

         3.3 Changes in Condition. Since the date of the most recent financial
statements constituting a part of the Seller Financial Statements, except to the
extent specifically described in Section 3.3 of the Seller Disclosure Schedule,
there has been no material Adverse change in Seller or any Seller Subsidiary.
There is no Event known to Seller which materially Adversely affects, or (so far
as Seller can now reasonably foresee) is likely to materially Adversely affect,
Seller or any Seller Subsidiary, except to the extent specifically described in
Section 3.3 of the Seller Disclosure Schedule.

         3.4 Materiality. The individual materiality exceptions and
qualifications contained herein or in the Seller Disclosure Schedules do not in
the aggregate, in the reasonable business judgment of Seller, prevent the Seller
Business from operating in the ordinary course or, in the aggregate, Materially
Adversely Affect the value of Seller Assets or the Seller Business in the hands
of ATS.

         3.5      Title to Properties; Leases.
                  ---------------------------

         (a) Section 3.5(a) of the Seller Disclosure Schedule contains a true,
accurate and complete list of all real property owned by Seller or any Seller
Subsidiary that is part of the Seller Assets. Seller or the applicable Seller
Subsidiary, as the case may be, has good indefeasible, marketable and insurable
title to all real property (other than leasehold real property) and good and
merchantable title to all other assets (other than real property), tangible and
intangible, constituting a part of the Seller Assets, in each case free and
clear of all Liens, except (i) Permitted Liens, (ii) Liens set forth on Section
3.5(a) of the Seller Disclosure Schedule and (iii) Approved Title Conditions.
Except for financing statements evidencing Liens referred to in the preceding
sentence (a true, accurate and complete list of which is set forth in Section
3.5(a) of the Seller Disclosure Schedule), to Seller's knowledge, no financing
statements under the Uniform Commercial Code and no other filing which names
Seller or any Seller Subsidiary as debtor or which covers or purports to cover
any of the Seller Assets is on file in any state or other jurisdiction, and
neither Seller nor any Seller Subsidiary has signed or agreed to sign any such
financing statement or filing or any agreement authorizing any secured party
thereunder to file any such financing 

                                      -7-

<PAGE>

statement or filing. To Seller's knowledge, except as disclosed in Section
3.5(a) of the Seller Disclosure Schedule, all improvements on the real property
owned or leased by Seller and the Seller Subsidiaries and constituting a part of
the Seller Assets are in compliance with applicable zoning, wetlands and land
use laws, ordinances and regulations and applicable title covenants, conditions,
restrictions and reservations in all respects necessary to conduct the
operations as presently conducted, except for any instances of non-compliance
which do not and will not in the aggregate have a material Adverse effect on the
owner or lessee, as the case may be, of such real property. To Seller's
knowledge, except as disclosed in Section 3.5(a) of the Seller Disclosure
Statement, all such improvements comply in all material aspects with all
Applicable Laws, Governmental Authorizations and Private Authorizations. To
Seller's knowledge, except as disclosed in Section 3.5(a) of the Seller
Disclosure Statement, all of the transmitting towers, ground radials, guy
anchors, transmitting buildings and related improvements located on the real
property owned or leased by Seller and the Seller Subsidiaries and constituting
a part of the Seller Assets are located entirely on such real property. To
Seller's knowledge, there is no pending, threatened or contemplated action to
take by eminent domain or otherwise to condemn any part of any real property
owned or leased by Seller and the Seller Subsidiaries and constituting a part of
the Seller Assets. Except as set forth in Section 3.5(a) of the Seller
Disclosure Schedule, such real property (other than land), fixtures, fixed
assets and other material items of personal property, including equipment, have,
in Seller's reasonable business judgment, been maintained in a manner consistent
with sound engineering practice and currently permit the Seller Business to be
operated in all material respects in accordance with the terms and conditions of
all Applicable Laws, Governmental Authorizations and Private Authorizations.

         (b) Section 3.5(b) of the Seller Disclosure Schedule contains a true,
accurate and complete list of all Leases under which any real property used in
the Seller Business is leased. Except as otherwise set forth in Schedule 3.5(b)
of the Seller Disclosure Schedule, each Lease or other occupancy or other
agreement under which Seller and each Seller Subsidiary holds real or personal
property constituting a part of the Seller Assets has been duly authorized,
executed and delivered by Seller and each Seller Subsidiary and, to Seller's
knowledge, each of the other parties thereto, and is a legal, valid and binding
obligation of Seller and each Seller Subsidiary, and, to Seller's knowledge,
each of the other parties thereto, enforceable in accordance with its terms,
except as such enforceability may be limited by bankruptcy, moratorium,
insolvency and similar laws affecting the rights and remedies of creditors and
obligations of debtors generally and by general principles of equity. To
Seller's knowledge, Seller or the applicable Seller Subsidiary, as the case may
be, has a valid leasehold interest in and enjoys peaceful and undisturbed
possession under all Leases pursuant to which it holds any such real property or
tangible personal property. To Seller's knowledge, all of such Leases are valid
and subsisting and in full force and effect; neither Seller or the applicable
Seller Subsidiary, as the case may be, nor, to Seller's knowledge, any other
party thereto, is in material default in the performance, observance or
fulfillment of any obligation, covenant or condition contained in any such
Lease. None of the fixed assets or equipment comprising a part of the Seller
Assets is subject to contracts of sale, and none is held by Seller or any Seller
Subsidiary as lessee or as conditional sales vendee under any Lease or
conditional sales contract and none is subject to any title retention agreement,
except as set forth in Section 3.5(b) of the Seller Disclosure Schedule.

         (c) Section 3.5(c) of the Seller Disclosure Schedule contains a true,
accurate and complete list of all material items of Seller Personal Property.
Seller or the applicable Seller Subsidiary, as the case may be, owns and has
good and merchantable title to all of the Personal Property relating to the
Seller Business (the "Seller Personal Property"), in each case, free and clear
of all Liens, except (i) Permitted Liens and (ii) Liens set forth on Section
3.5(c) of the Seller Disclosure Schedule (which Liens shall be released prior to
Closing). Except as set forth in Section 3.5(c) of the Seller Disclosure
Schedule, all of 

                                      -8-

<PAGE>

the Seller Personal Property is in operating condition, has been maintained in a
manner consistent with good engineering practice, does not, to Seller's
knowledge, require any material amount of repair, maintenance or replacement and
currently permits the Seller Business to be operated in accordance with the
terms and conditions of all Applicable Laws. The Seller Personal Property is
being sold in "as is" condition.

         3.6 Compliance with Private Authorizations. Section 3.6 of the Seller
Disclosure Schedule sets forth a true, accurate and complete list of each
Private Authorization which individually is material to the Seller Assets or the
Seller Business. To Seller's knowledge, Seller and each Seller Subsidiary has
obtained all Private Authorizations which are necessary for the ownership or
operation of the Seller Assets or the conduct of the Seller Business which, if
not obtained and maintained, could, individually or in the aggregate, materially
Adversely affect Seller or any Seller Subsidiary. To Seller's knowledge, All of
such Private Authorizations are valid and in good standing and are in full force
and effect. None of Seller or any Seller Subsidiary is in breach or violation
of, or in default in the performance, observance or fulfillment of, any such
Private Authorization, and no Event exists or has occurred, which constitutes,
or but for any requirement of giving of notice or passage of time or both would
constitute, such a breach, violation or default, under any such Private
Authorization, except for such defaults, breaches or violations as do not and
will not have in the aggregate any material Adverse effect on Seller or any
Seller Subsidiary. To Seller's knowledge, no such Private Authorization is the
subject of any pending or threatened attack, revocation or termination.

         3.7    Compliance with Governmental Authorizations and Applicable Law.
                --------------------------------------------------------------

         (a) Section 3.7(a) of the Seller Disclosure Schedule contains a true,
complete and accurate list of each Governmental Authorization required, to
Seller's knowledge, under Applicable Laws (i) to own and operate the Seller
Business, as currently conducted or proposed to be conducted on or prior to the
Closing Date, all of which are in full force and effect or (ii) that is
necessary to permit Seller to execute and deliver this Agreement and to perform
its obligations hereunder. Except as set forth in Section 3.7(a) of the Seller
Disclosure Schedule, to Seller's knowledge, Seller and each Seller Subsidiary
has obtained all Governmental Authorizations which are necessary for the
ownership or operation of the Seller Assets or the conduct of the Seller
Business as now conducted and which, if not obtained and maintained, would,
individually or in the aggregate, have any material Adverse effect on Seller or
any Seller Subsidiary. To Seller's knowledge, none of the Governmental
Authorizations listed in Section 3.7(a) of the Seller Disclosure Schedule is
subject to any restriction or condition which would limit in any material
respect the ownership or operations of the Seller Assets or the conduct of the
Seller Business as currently conducted, except for restrictions and conditions
generally applicable to Governmental Authorizations of such type. To Seller's
knowledge, except as set forth in Section 3.7(a) of the Seller Disclosure
Schedule, the Governmental Authorizations listed in Section 3.7(a) of the Seller
Disclosure Schedule are valid and in good standing, are in full force and effect
and are not impaired in any material respect by any act or omission of Seller,
the Seller Subsidiaries or any of their respective officers, directors,
employees or agents, and the ownership or operation of the Seller Assets or the
conduct of the Seller Business are in accordance in all material respects with
the Governmental Authorizations. To Seller's knowledge, all material reports,
forms and statements required to be filed by Seller and each Seller Subsidiary
with all Authorities with respect to the Seller Business have been filed and are
true, complete and accurate in all material respects. To Seller's knowledge, no
such Governmental Authorization is the subject of any pending or threatened
challenge or proceeding to revoke or terminate any such Governmental
Authorization. Seller has no reason to believe that any such Governmental
Authorization would not be renewed in the name of Seller or the applicable
Seller Subsidiary by the granting Authority in the ordinary course.

                                      -9-
<PAGE>

         (b) Except as otherwise specifically described in Section 3.7(b) of the
Seller Disclosure Schedule, none of Seller, any Seller Subsidiary nor any
director or officer thereof (in connection with ownership or operation of the
Seller Assets or the conduct of the Seller Business) is in or is charged by any
Authority with or, to Seller's knowledge, at any time since January 1, 1996 has
been in or has been charged by any Authority with, or, to Seller's knowledge, is
threatened or under investigation by any Authority with respect to, breach or
violation of, or default in the performance, observance or fulfillment of, any
Governmental Authorization or any Applicable Law relating to the ownership and
operation of the Seller Assets or the conduct of the Seller Business. In
particular, but without limiting the generality of the foregoing, to Seller's
knowledge, there are no applications, complaints or Legal Actions pending or
threatened before or by any Authority (x) relating to the ownership or operation
of the Seller Assets or the conduct of the Seller Business which, individually
or in the aggregate, are reasonably likely to result in the revocation or
termination of any Governmental Authorization or the imposition of any
restriction of such a nature as would Adversely affect the ownership or
operation of the Seller Assets or the conduct of the Seller Business; (y)
involving charges of illegal discrimination by Seller or any Seller Subsidiary
under any federal or state employment Laws with respect to any of the Seller
Employees, or (z) involving Environmental Laws or zoning laws, except as
otherwise specifically described in Section 3.7(b) of the Seller Disclosure
Schedule.

         (c) Except as otherwise specifically described in Section 3.7(c) of the
Seller Disclosure Schedule, to Seller's knowledge, no Event exists or has
occurred, which constitutes, or but for any requirement of giving of notice or
passage of time or both would constitute, such a breach, violation or default,
under (i) any Governmental Authorization or any Applicable Law, except for such
breaches, violations or defaults as do not and will not have, individually or in
the aggregate, any material Adverse effect on Seller or any Seller Subsidiary or
(ii) any material requirement of any property or liability insurance carrier,
applicable to the ownership or operations of the Seller Assets or the conduct of
the Seller Business.

         (d) With respect to matters, if any, of a nature referred to in Section
3.7(a), 3.7(b) or 3.7(c) of the Seller Disclosure Schedule, except as otherwise
specifically described in Section 3.7(d) of the Seller Disclosure Schedule, all
such information and matters set forth in the Seller Disclosure Schedule, if
Adversely determined against Seller or the applicable Seller Subsidiary, will
not, individually or in the aggregate, have a materially Adversely effect on
Seller or any Seller Subsidiary.

         3.8 Intangible Assets. Section 3.8 of the Seller Disclosure Schedule
sets forth a true, accurate and complete list of all Intangible Assets (other
than Governmental Authorizations and Private Authorizations) relating to the
ownership and operation of the Seller Assets or the conduct of the Seller
Business held or used by Seller and each Seller Subsidiary, including without
limitation the nature of Seller's and each Seller Subsidiary's interest in each
and the extent to which the same have been duly registered in the offices as
indicated therein. To Seller's knowledge, except as set forth in Section 3.8 of
the Seller Disclosure Schedule, no Intangible Assets (except Governmental
Authorizations, Private Authorizations, and the Intangible Assets so set forth)
are required for the ownership or operation of the Seller Assets or the conduct
of the Seller Business as currently owned, operated and conducted or proposed to
be owned, operated and conducted on or prior to the Closing Date. Seller does
not, to its knowledge, wrongfully infringe upon or unlawfully use any Intangible
Assets owned or claimed by another, and none of Seller or any Seller Subsidiary
has received any notice of any claim or infringement relating to any such
Intangible Asset.

         3.9 Related Transactions. None of Seller or any Seller Subsidiary is a
party or subject to any Contractual Obligation relating to the ownership or
operation of the Seller Assets or the conduct of the 

                                      -10-

<PAGE>

Seller Business between Seller or the applicable Seller Subsidiary and any of
its officers, directors, shareholders, employees or, to the knowledge of Seller,
any Affiliate of any thereof, including without limitation any Contractual
Obligation providing for the furnishing of services to or by, providing for
rental of property, real, personal or mixed, to or from, or providing for the
lending or borrowing of money to or from or otherwise requiring payments to or
from, any such Person, other than (i) Employment Arrangements listed or
described in Section 3.13 of the Seller Disclosure Schedule, (ii) Contractual
Obligations between Seller or any Seller Subsidiary and any of its directors,
shareholders, officers, employees or Affiliates of Seller or any of the
foregoing, which constitute Excluded Assets or Seller Nonassumed Obligations, or
(iii) as specifically set forth in Section 3.9 of the Seller Disclosure
Schedule.

         3.10 Insurance. Seller and each Seller Subsidiary maintains, with
respect to the Seller Assets and the Seller Business, policies of fire and
extended coverage and casualty, liability and other forms of insurance in such
amounts and against such risks and losses as are set forth in Section 3.10 of
the Seller Disclosure Schedule.

         3.11     Tax Matters.
                  -----------

         (a) Except as set forth in Section 3.11(a) of the Seller Disclosure
Schedule, Seller has in accordance with all Applicable Laws filed all Tax
Returns and/or extensions which are required to be filed, and has paid, or made
adequate provision for the payment of, all Taxes which have or may become due
and payable pursuant to said Tax Returns and all other governmental charges and
assessments received to date other than those Taxes being contested in good
faith for which adequate provision has been made on the most recent balance
sheet forming part of Seller Financial Statements. The Tax Returns of Seller and
each Seller Subsidiary have been prepared in all material respects in accordance
with all Applicable Laws and generally accepted principles applicable to
taxation consistently applied. All Taxes which Seller and each Seller Subsidiary
is required by law to withhold and collect have been duly withheld and
collected, and have been paid over, in a timely manner, to the proper
Authorities to the extent due and payable. Except as set forth in Section
3.11(a) of the Seller Disclosure Schedule, adequate provision has been made on
the most recent balance sheet forming part of Seller Financial Statements for
all Taxes accrued through the date of such balance sheet of any kind, including
interest and penalties in respect thereof, whether disputed or not, and whether
past, current or deferred, accrued or unaccrued, fixed, contingent, absolute or
other, and, except as set forth in Section 3.11(a) of the Seller Disclosure
Schedule, there are, to Seller's knowledge, no past transactions or matters
which could result in additional Taxes of a material nature to Seller and each
Seller Subsidiary for which an adequate reserve has not been provided on such
balance sheet.

         (b) The information shown on the federal income Tax Returns of Seller
and each Seller Subsidiary for each of the most recent three (3) tax years (true
and complete copies of which have, to the extent requested by ATS, been
furnished by Seller to ATS) is true, accurate and complete in all material
respects and fairly and accurately reflects the information purported to be
shown. Federal and state income Tax Returns of Seller and each Seller Subsidiary
have not been examined by the IRS or applicable state Authority, and none of
Seller or any Seller Subsidiary has been notified of any proposed examination,
except as shown in Section 3.11(b) of the Seller Disclosure Schedule.

         (c) None of Seller or any Seller Subsidiary is a party to any tax
sharing agreement or arrangement.

                                      -11-

<PAGE>

         3.12  Broker or Finder.  No Person  assisted  in or  brought  about the
negotiation  of this  Agreement or the  Transactions  in the capacity of broker,
agent or finder or in any  similar  capacity  on  behalf  of Seller  other  than
Communications Equity Associates, Inc. ("CEA").

         3.13 Employment Arrangements. Section 3.13 of the Seller Disclosure
Schedule contains a true, accurate and complete list of all employees of Seller
and each Seller Subsidiary involved in the operation of the Seller Assets or the
conduct of the Seller Business (the "Seller Employees"), together with each such
employee's title or the capacity in which he or she is employed and the basis
for each such employee's compensation. None of Seller or any Seller Subsidiary
has any obligation or liability, contingent or other, under any Employment
Arrangement with any Seller Employee, other than those listed or described in
Section 3.13 of the Seller Disclosure Schedule. Except as described in Section
3.13 of the Seller Disclosure Schedule, (a) none of the Seller Employees is now,
or since January 1, 1996 has been, represented by any labor union or other
employee collective bargaining organization, and none of Seller or any Seller
Subsidiary is, or ever has been, a party to any labor or other collective
bargaining agreement with respect to any of the Seller Employees, (b) there are
no pending grievances, disputes or controversies with any union or any other
employee or collective bargaining organization of such employees, or threats of
strikes, work stoppages or slowdowns or any pending demands for collective
bargaining by any such union or other organization, (c) none of Seller, any
Seller Subsidiary or any of such employees is now, or has since January 1, 1996
been, subject to or involved in or, to Seller's knowledge, threatened with, any
union elections, petitions therefore or other organizational or recruiting
activities, in each case with respect to the Seller Employees, and (d) none of
the Seller Employees has given written notice to Seller or any Seller Subsidiary
that he or she does not intend to continue employment with Seller until the
Closing or with ATS following the Closing. Seller and each Seller Subsidiary has
performed in all material respects all obligations required to be performed
under all Plans and Benefit Arrangements and is not in material breach or
violation of or in material default or arrears under any of the terms,
provisions or conditions thereof.

         3.14 Material Agreements. Listed on Section 3.14 of the Seller
Disclosure Schedule are all Material Agreements relating to the ownership or
operation of the Seller Assets or the conduct of the business of the Seller
Business or to which Seller and each Seller Subsidiary is a party or to which it
is bound or which any of the Seller Assets is subject. True, accurate and
complete copies of each of such Material Agreements have been made available by
Seller to ATS and Seller has provided ATS with photocopies of all such Material
Agreements requested by ATS (or true, accurate and complete descriptions thereof
have been set forth in Section 3.14 of the Seller Disclosure Schedule, with
respect to Material Agreements that are oral). All of such Material Agreements
are valid, binding and legally enforceable obligations of Seller or the
applicable Seller Subsidiary and, to Seller's knowledge, all other parties
thereto, except as such enforceability may be limited by bankruptcy, moratorium,
insolvency and similar laws affecting the rights and remedies of creditors and
obligations of debtors generally and by general principles of equity. Seller and
each Seller Subsidiary has duly complied with all of the material terms and
conditions of each such Material Agreement and has not done or performed, or
failed to do or perform (and, to Seller's knowledge, there is no pending or
threatened Claim that Seller or any Seller Subsidiary has not so complied, done
and performed or failed to do and perform) any act which would invalidate or
provide grounds for the other party thereto to terminate (with or without
notice, passage of time or both) such Material Agreement or impair the rights or
benefits, or increase the costs, of Seller or any Seller Subsidiary under any of
such Material Agreements in any material respect.

         3.15 Ordinary Course of Business. Seller and each Seller Subsidiary,
from the end of its most recent fiscal year to the date hereof, except (i) as
may be described on Section 3.15 of the Seller 

                                      -12-

<PAGE>

Disclosure Schedule, or (ii) as may be required or expressly contemplated by the
terms of this Agreement, with respect to the Seller Assets and the Seller
Business:

                  (a) has operated its business in all material respects in the
         normal, usual and customary manner in the ordinary and regular course
         of business, consistent with prior practice;

                  (b) except in each case in the ordinary course of business,
         consistent with prior practice, has not sold or otherwise disposed of
         or contracted to sell or otherwise dispose of any of its properties or
         assets having a value in excess of $50,000;

                  (c) has not made or committed to make any additions to its
         property or any purchases of equipment, except in the ordinary course
         of business consistent with past practice or for normal maintenance and
         replacements;

                  (d) has not increased the compensation payable or to become
         payable to any of the Seller Employees other than in the ordinary
         course of business or otherwise materially altered, modified or changed
         the terms of their employment;

                  (e) has not suffered any material damage, destruction or loss
         (whether or not covered by insurance) or any acquisition or taking of
         property by any Authority;

                  (f) has not waived any rights of material value without fair
         and adequate consideration;

                  (g) has not experienced any work stoppage;

                  (h) except in the ordinary course of business, has not entered
         into, amended or terminated any Lease, Governmental Authorization,
         Private Authorization, Material Agreement or Employment Arrangement, or
         any transaction, agreement or arrangement with any Affiliate of Seller,
         except for Seller Nonassumed Obligations; and

                  (i) has not entered into any other transaction or series of
         related transactions which individually or in the aggregate is material
         to the Seller Assets or the Seller Business.

         3.16 Material and Adverse Restrictions. None of Seller or any Seller
Subsidiary is a party to or subject to, nor is any of the Seller Assets subject
to, any Applicable Law, Governmental Authorization, Contractual Obligation,
Employment Arrangement, Material Agreement or Private Authorization, or any
other obligation or restriction of any kind or character, which now has or, as
far as Seller can now reasonably foresee, at any time in the future,
individually or in the aggregate, is likely to have, any material Adverse effect
on the ability of Seller or any Seller Subsidiary to perform its obligations
under this Agreement, except as set forth in Section 3.16 of the Seller
Disclosure Schedule.

         3.17 Solvency. As of the execution and delivery of this Agreement,
Seller and each Seller Subsidiary is, and immediately prior to and after giving
effect to the consummation of the Transactions will be, solvent.

         3.18 Environmental Matters. Except as set forth in Section 3.18 of the
Seller Disclosure Schedule, with respect to the Seller Assets, Seller and each
Seller Subsidiary:

                                      -13-

<PAGE>

                  (a) has not been notified that it is potentially liable under,
         has not received any request for information or other correspondence
         concerning its potential liability with respect to any site or facility
         under, and, to Seller's knowledge, is not a "potentially responsible
         party" under, the Comprehensive Environmental Response, Compensation
         and Liability Act of 1980, as amended, the Resource Conservation
         Recovery Act, as amended, or any similar state law;

                  (b) has not entered into or received any consent decree,
         compliance order or administrative order issued pursuant to any
         Environmental Law;

                  (c) is not a party in interest or in default under any
         judgment, order, writ, injunction or decree of any Final Order issued
         pursuant to any Environmental Law;

                  (d) to Seller's knowledge, is in compliance in all material
         respects with all Environmental Laws, has obtained all Environmental
         Permits required under Environmental Laws, and, to Seller's knowledge,
         is not the subject of or threatened with any Legal Action involving a
         demand for damages or other potential liability including any Lien with
         respect to material violations or material breaches of any
         Environmental Law;

                  (e) has no knowledge of any past or present Event related to
         the Seller Business or the Seller Assets which Event, individually or
         in the aggregate, will interfere with or prevent continued material
         compliance with all Environmental Laws, or which, individually or in
         the aggregate, will form the basis of any material Claim for the
         release or threatened release into the environment, of any Hazardous
         Material; and

                  (f) does not own or use any underground storage tank.


                                    ARTICLE 4

                      REPRESENTATIONS AND WARRANTIES OF ATS
                      -------------------------------------

         ATS represents, warrants and covenants to, and agrees with, Seller as
follows:

         4.1      Organization and Business; Power and Authority; Effect of 
                  Transaction.
                  ---------------------------------------------------------

         (a) ATS is a corporation duly organized, validly existing and in good
standing under the laws of its jurisdiction of incorporation and has all
requisite power and authority (corporate and other) to own or hold under lease
its properties and to conduct its business as now conducted.

         (b) ATS has all requisite corporate power and corporate authority
necessary to enable it to execute and deliver, and to perform its obligations
under, this Agreement and each Collateral Document executed or required to be
executed by it pursuant hereto or thereto or to consummate the Transactions; and
the execution, delivery and performance of this Agreement and each Collateral
Document executed or required to be executed by it pursuant hereto or thereto
have been duly authorized by all requisite corporate or other action on the part
of ATS. This Agreement has been duly executed and delivered by ATS and
constitutes, and each Collateral Document executed or required to be executed by
it pursuant hereto or thereto or to consummate the Transactions when executed
and delivered by ATS will constitute, legal, valid and binding obligations of
ATS, enforceable in accordance with their respective terms, except as such
enforceability may be limited by bankruptcy, moratorium, insolvency and similar
laws affecting 

                                      -14-

<PAGE>

the rights and remedies of creditors and the obligations of debtors generally
and by general principles of equity.

         (c) Except for matters which would have not material Adverse effect on
ATS, neither the execution and delivery by ATS of this Agreement or any
Collateral Document executed or required to be executed by it pursuant hereto or
thereto, nor the consummation by ATS of the Transactions, nor compliance with
the terms, conditions and provisions hereof or thereof by ATS:

                  (i) will conflict with, or result in a breach or violation of,
         or constitute a default under, any Organic Document of ATS or any
         Applicable Law on the part of ATS, or will conflict with, or result in
         a breach or violation of, or constitute a default under, or permit the
         acceleration of any obligation or liability in, or but for any
         requirement of giving of notice or passage of time or both would
         constitute such a conflict with, breach or violation of, or default
         under, or permit any such acceleration in, any Contractual Obligation
         of ATS; or

                  (ii) will require ATS to make or obtain any Governmental
         Authorization, Governmental Filing or Private Authorization including
         without limitation under the FCA, except for filings under the
         Hart-Scott-Rodino Act and filings listed in Section 3.1(c) of the
         Seller Disclosure Schedule which will be made jointly with Seller.

         4.2 Broker or Finder. No Person assisted in or brought about the
negotiation of this Agreement or the Transactions in the capacity of broker,
agent or finder or in any similar capacity on behalf of ATS.

         4.3 No Legal Action. There are no Legal Actions pending or, to the
knowledge of ATS, threatened against ATS or any of its Affiliates, officers or
directors, that question or may affect the validity of this Agreement or the
right or obligation of ATS to consummate the transactions contemplated
hereunder.

                                    ARTICLE 5

                                    COVENANTS
                                    ---------

         5.1      Access to Information; Confidentiality.
                  --------------------------------------

         (a) Seller shall afford to ATS and its accountants, counsel, lenders,
financial advisors and other representatives (the "Representatives") full access
during normal business hours throughout the period prior to the Closing Date to
all of Seller's and each Seller Subsidiary's properties, books, contracts,
commitments and records (including without limitation Tax Returns) relating to
the Seller Assets and the Seller Business and, during such period, shall furnish
promptly upon request (i) a copy of each report, schedule and other document
filed or received by any of them pursuant to the requirements of any Applicable
Law or filed by it with any Authority in connection with the Transactions or
which may have an Adverse effect on the Seller Assets or the Seller Business or
the businesses, operations, properties, prospects, personnel, condition
(financial or other), or results of operations thereof, (ii) all financial
records, ledgers, work papers and other sources of financial information
possessed and controlled by Seller or its accountants reasonably deemed by ATS
or its Representatives necessary or useful for the purpose of performing an
audit of the Seller Assets and the Seller Business and certifying financial
statements and financial information, and (iii) such other information in the
possession or control of Seller or its 

                                      -15-

<PAGE>

accountants concerning any of the foregoing as ATS shall reasonably request;
provided, however, that Seller shall not be required to permit any such access
to the extent same would unreasonably interfere with Seller's normal business
operations. All non-public information relating to the Seller Assets or the
Seller Business furnished prior to the execution, or pursuant to the provisions,
of this Agreement, including without limitation this Section, will be kept
confidential and shall not, without the prior written consent of Seller, be
disclosed by ATS in any manner whatsoever, in whole or in part, and shall not be
used for any purposes, other than in connection with the Transactions. In no
event shall ATS or any of its Representatives use such information to the
detriment of Seller. ATS agrees to reveal such information only to those of its
Representatives or other Persons who need to know such information for the
purpose of evaluating the Transactions, who are informed of the confidential
nature of such information and who shall undertake to act in accordance with the
terms and conditions of this Agreement. From and after the Closing for a period
of five (5) years, Seller shall not, without the prior written consent of ATS,
disclose any information with respect to the Seller Assets or the Seller
Business, other than in connection with the Transactions or to the extent
required by Applicable Law.

         (b) Subject to the terms and conditions of Section 5.1(a), ATS may,
subject to prior consultation with Seller, disclose such information as may be
necessary in connection with seeking all Governmental and Private Authorizations
or that is required by Applicable Law to be disclosed. In the event that this
Agreement is terminated for any reason, ATS shall promptly redeliver all
non-public written material provided pursuant to this Section or any other
provision of this Agreement or otherwise in connection with the Transactions and
shall not retain any copies, extracts or other reproductions in whole or in part
of such written material, other than, in the event mutual releases are not
exchanged upon such termination, one copy thereof which shall be delivered to
independent counsel for ATS.

         (c) Anything in this Section or elsewhere in this Agreement to the
contrary notwithstanding, either party may disclose information received or
retained by it in accordance with the provisions of this Agreement if it can
demonstrate (i) such information is generally available to or known by the
public from a source other than the party seeking to disclose such information
or (ii) was obtained by the party seeking to disclose such information from a
source other than the other party, provided that such source was not bound by a
duty of confidentiality to the other party or another party with respect to such
information.

         (d) No investigation pursuant to this Section or otherwise shall affect
any representation or warranty in this Agreement of either party or any
condition to the obligations of the parties hereto, except as set forth in
Section 8.3(d).

         (e) The provisions of this Section shall apply to each Seller
Subsidiary.

         5.2      Agreement to Cooperate.
                  ----------------------

         (a) Each of the parties hereto shall use reasonable business efforts
(x) to take, or cause to be taken, all actions and to do, or cause to be done,
all things necessary, proper or advisable under Applicable Law to consummate the
Transactions, and (y) to refrain from taking, or causing to be taken, any action
and to refrain from doing or causing to be done, any thing which could impede or
impair the consummation of the Transactions, including, in all cases, without
limitation, using its reasonable business efforts (i) to prepare and file with
the applicable Authorities as promptly as practicable after the execution of
this Agreement all requisite applications and amendments thereto, together with
related information, data and exhibits, necessary to request issuance of orders
approving the Transactions by all such applicable Authorities, each of which
must be obtained or become final to the extent provided in Section 6.1(a), (ii)
to obtain all necessary or appropriate waivers, consents and approvals,
including without limitation those 

                                      -16-

<PAGE>

referred to in Section 6.2(d), (iii) to effect all necessary registrations,
filings and submissions (including without limitation filings under the
Hart-Scott-Rodino Act and all filings necessary for ATS to own and operate the
Seller Assets and conduct the Seller Business) (the parties agreeing to use
commercially reasonable efforts to make all required filings under the
Hart-Scott-Rodino Act within sixty (60) days after the date hereof, each such
filing to request early termination), (iv) to lift any injunction or other legal
bar to the Transactions (and, in such case, to proceed with the Transactions as
expeditiously as possible), and (v) to obtain the satisfaction of the conditions
specified in Article 6, including without limitation the truth and correctness
as of the Closing Date as if made on and as of the Closing Date of the
representations and warranties of such party and the performance and
satisfaction as of the Closing Date of all agreements and conditions to be
performed or satisfied by such party.

         (b) The parties shall cooperate with one another in the preparation,
execution and filing of all Tax Returns, questionnaires, applications, or other
documents regarding any real property transfer or gains, sales, use, transfer,
value added, stock transfer and stamp Taxes, any transfer, recording,
registration and other fees, and any similar Taxes which become payable in
connection with the Transactions that are required or permitted to be filed on
or before the Closing Date.

         (c) Seller shall cooperate and use its reasonable business efforts to
cause its independent accountants to reasonably cooperate with ATS, and at ATS'
expense, in order to enable ATS to have its independent accountants prepare
audited financial statements for the Seller Business described in Section
6.2(g). Seller represents and warrants that any such financial statements will
be true, accurate and complete in all material respects, and will fairly present
the financial condition and results of operation of the Company on the basis
therein stated, as of the respective dates thereof and for the respective
periods covered thereby. Without limiting the generality of the foregoing,
Seller agrees that after the Closing Date it will (x) consent to the use of such
audited financial statements in any registration statement or other document
filed by ATS or any Affiliate of ATS under any applicable federal or state
securities Law the Securities Act or the Exchange Act and (y) execute and
deliver, and cause its directors and officers to execute and deliver, such
"representation" letters as are customarily delivered in connection with audits
and as ATS' independent accountants may reasonably request under the
circumstances.

         5.3 Public Announcements. Until the Closing, or in the event of
termination of this Agreement, Seller and ATS shall consult with the other
before issuing any press release or otherwise making any public statements with
respect to this Agreement or the Transactions and shall not issue any such press
release or make any such public statement without the prior written consent of
the other. Notwithstanding the foregoing, each party acknowledges and agrees
that Seller and ATS may, without its prior consent, issue such press releases or
make such public statements as may be required by Applicable Law, in which case,
the party proposing to make such press release or public statement will consult
with the other regarding the nature, extent and form of such press release or
public statement. In addition, subject to the terms and conditions hereof, ATS
may disclose, with Seller's prior consent, not to be unreasonably withheld,
delayed or conditioned, the subject matter of this Agreement to Persons with
whom Seller has a business or contractual relationship in connection with ATS'
due diligence investigation of Seller.

         5.4 Notification of Certain Matters. Each party shall give prompt
notice to the other, of the occurrence or non-occurrence of any Event the
occurrence or non-occurrence of which would be likely to cause (i) any
representation or warranty made by it contained in this Agreement to be untrue
or inaccurate in any material respect such that one or more of the conditions of
Closing might not be satisfied, or (ii) any covenant, condition or agreement
made by it contained in this Agreement not to be complied with or satisfied, or
(iii) any change to be made in the Seller Disclosure Schedule in any respect

                                      -17-

<PAGE>

such that one or more of the conditions of Closing might not be satisfied, and
any failure made by it to comply with or satisfy, or be able to comply with or
satisfy, any covenant, condition or agreement to be complied with or satisfied
by it hereunder in any respect such that one or more of the conditions of
Closing might not be satisfied; provided, however, that the delivery of any
notice pursuant to this Section shall not limit or otherwise affect the remedies
available hereunder to the party receiving such notice.

         5.5 No Solicitation. During the term of this Agreement, none of Seller
or any Seller Subsidiary shall, nor shall it knowingly permit any of its
Representatives to, initiate, solicit or facilitate, directly or indirectly, any
inquiries or the making of any proposal with respect to any Alternative
Transaction, engage in any discussions or negotiations concerning, or provide to
any other Person any information or data relating to, it or any Subsidiary for
the purposes of, or otherwise cooperate in any way with or assist or participate
in, or facilitate any inquiries or the making of any proposal which constitutes,
or may reasonably be expected to lead to, a proposal to seek or effect any
Alternative Transaction, or agree to or endorse any Alternative Transaction.
"Alternative Transaction" means a transaction or series of related transactions
(other than the Transactions) resulting in (i) any merger or consolidation,
regardless of whether Seller or any Seller Subsidiary is the surviving Entity
unless the surviving Entity remains obligated under this Agreement to the same
extent as it was, or (ii) any sale or other disposition of all or any
substantial part of the Seller Assets or the Seller Business. The provisions of
this Section shall apply to each Seller Subsidiary. If Seller or any of its
Representatives receives any inquiry with respect to an Alternative Transaction
while this Agreement is in effect, Seller shall inform the inquiring party that
it is not entitled to enter into discussions or negotiations relating to an
Alternative Transaction.

         5.6 Conduct of Business by Seller Pending the Closing. Except as
otherwise contemplated by this Agreement, after the date hereof and prior to the
Closing Date or earlier termination of this Agreement, unless ATS shall
otherwise agree in writing, Seller shall, and shall cause each Seller
Subsidiary, to the extent relating to the Seller Business or the Seller Assets:

                  (a) conduct its business in the ordinary and usual course of
         business and consistent with past practice, including without
         limitation the performance of such maintenance, repairs or replacements
         with respect to communication towers, fixtures and Personal Property
         comprising the Seller Assets as is consistent with past practice
         (except that the foregoing shall not be construed to require Seller or
         any Seller Subsidiary to make capital expenditures other than those set
         forth in Section 5.6(a) of the Seller Disclosure Schedule unless ATS
         shall first agree in writing to reimburse Seller the cost therefor in
         which event Seller or the applicable Seller Subsidiary shall be
         obligated to make such capital expenditure);

                  (b) use all reasonable business efforts to preserve intact its
         business organizations and goodwill, keep available the services of its
         present key employees, and preserve the goodwill and business
         relationships with customers and others having business relationships
         with it;

                  (c) confer, as and when reasonably requested, on a regular and
         frequent basis with one or more representatives of ATS to report
         material operational matters and the general status of ongoing
         operations;

                  (d) maintain with financially responsible insurance companies
         insurance on its assets and its business in such amounts and against
         such risks and losses as are consistent with past practice;

                                      -18-

<PAGE>

                  (e) use reasonable business efforts to (i) operate the Seller
         Business in conformity in all material respects with all Governmental
         and Private Authorizations, Leases and Material Agreements on a basis
         consistent with past practice and Applicable Law and the rules and
         regulations of any Authority with jurisdiction over the Seller Assets
         or the Seller Business, and (ii) maintain in full force and effect all
         such Governmental and Private Authorizations, Leases and Material
         Agreements relating to the Seller Business;

                  (f) not (i) dispose of any of the Seller Assets owned by
         Seller or any Seller Subsidiary or used in the operation of the Seller
         Business (other than for the disposition in the ordinary course of
         business of immaterial assets that are of no further use to the Seller
         Business) or (ii) modify or change in any material respect, or enter
         into, any Material Agreement relating to the Seller Business; and

                  (g) not voluntarily take any action which if taken between the
         end of its most recent fiscal year and prior to the date of this
         Agreement would have been required to be noted as an exception on
         Section 3.15 of the Seller Disclosure Schedule.

With respect to any transaction or act proposed to be entered into or performed
by Seller which, pursuant to paragraphs (a) through (g) of this section,
requires the prior approval of ATS, ATS shall be deemed to have approved same
unless written notice of disapproval is received by Seller within ten (10)
business days after receipt by ATS of a written request for approval made by
Seller.

         5.7 Preliminary Title Reports. As promptly as practicable after the
execution of this Agreement, Seller shall, at its sole cost and expense, deliver
or cause to be delivered to ATS a standard preliminary title report dated on or
after the date of this Agreement issued by such title company or companies as
Seller and ATS shall mutually reasonably agree (collectively, the "Title
Company") with respect to those Seller Assets comprised of the parcels of real
property described in Section 5.7 of the Seller Disclosure Schedule (the
"Insured Real Property"). Such reports, as same may be amended or supplemented
from time to time to reflect additional title matters, are referred to herein as
the "Title Reports". The rights and obligations of the parties shall thereafter
be as follows:

                  (a) On or before fifteen (15) business days after ATS' receipt
         of each of the Title Reports, ATS shall give to Seller written notice
         ("ATS' Title Notice") of ATS' disapproval of any matters shown in the
         Title Reports. ATS' failure to give ATS' Title Notice shall be deemed
         to constitute ATS' approval of all matters disclosed by the Title
         Reports.

                  (b) If ATS disapproves any title matters pursuant to ATS'
         Title Notice, Seller shall deliver written notice ("Seller's Title
         Notice") to ATS within fifteen (15) business days after Seller's
         receipt of ATS' Title Notice, stating whether Seller agrees to
         eliminate or cause the Title Company to insure over such disapproved
         title matters from title to the Insured Real Property prior to the
         Closing or, if elimination is not feasible prior to the Closing, to
         effect such elimination thereafter and to indemnify and hold harmless
         ATS with respect to such remedy. If Seller fails to timely deliver
         Seller's Title Notice, or if Seller delivers Seller's Title Notice but
         states therein that Seller is unwilling or unable to eliminate such
         disapproved title matters, ATS and Seller shall negotiate in good faith
         in an attempt to resolve such matters which resolution may, without
         limitation, take the form of eliminating one or more of the sites with
         disapproved title matters (the "Disapproved Title Sites" and,
         collectively with the "Disapproved Environmental Sites", the
         "Disapproved Sites") from the Seller Assets, a reduction of the
         Purchase Price or an indemnification (or escrow) from Seller (subject
         to the limitations as to time or amount specified 

                                      -19-

<PAGE>

         in Section 5.9 and Article 8). If within twenty (20) business days of
         such negotiations (or such longer period as ATS and Seller shall
         agree), the parties have been unable to resolve such matters, the
         provisions of Section 5.9 shall govern.

                  (c) If, at any time following ATS' approval of the Title
         Reports, Seller or the Title Company notifies ATS of any additional
         matter affecting title to the Insured Real Property, the parties shall
         have substantially the same rights and obligations as are set forth in
         paragraphs (a) and (b) above with respect to the affected parcel.

         5.8 Environmental Site Assessments. Not later than sixty (60) days
after the execution of this Agreement, ATS may obtain, and deliver to Seller
full and complete copies of, Phase I environmental site assessment reports (the
"Environmental Reports") on any or all of those certain parcels of real property
described on Section 5.8 of the Seller Disclosure Schedule. Site assessments
shall be conducted by such consultants and professionals as ATS and Seller shall
mutually agree (collectively, the "Environmental Company"), and shall be
arranged at times mutually convenient to the parties. Each of Seller and ATS
shall be entitled to have representatives present at the time such site
assessments are conducted, and to have copies of all correspondence with the
Environmental Company.

                  (a) On or before fifteen (15) business days after ATS' receipt
         of each of the Environmental Reports, ATS shall give to Seller written
         notice ("ATS' Environmental Notice") of ATS' disapproval of any matters
         shown in the Environmental Reports. ATS' failure to give ATS'
         Environmental Notice shall be deemed to constitute ATS' approval of all
         matters disclosed by the Environmental Reports.

                  (b) If ATS disapproves any environmental matters pursuant to
         ATS' Environmental Notice, Seller shall deliver written notice
         ("Seller's Environmental Notice") to ATS within fifteen (15) business
         days after Seller's receipt of ATS' Environmental Notice, stating
         whether Seller agrees to eliminate and remedy such matter prior to the
         Closing or, if such elimination or remedy is not feasible prior to the
         Closing, to effect such elimination and remedy thereafter and to
         indemnify and hold harmless ATS with respect to such remedy. If Seller
         fails to timely deliver Seller's Environmental Notice, or if Seller
         delivers Seller's Environmental Notice but states therein that Seller
         is unwilling or unable to eliminate and remedy such environmental
         matters, ATS and Seller shall negotiate in good faith in an attempt to
         resolve such matters which resolution may, without limitation, take the
         form of eliminating one or more of the sites with disapproved
         environmental matters (the "Disapproved Environmental Sites") from the
         Seller Assets, a reduction of the Purchase Price or an indemnification
         (or escrow) from Seller (subject to the limitations as to time or
         amount specified in Section 5.9 and Article 8). If within twenty (20)
         business days of such negotiations (or such longer period as ATS and
         Seller shall agree), the parties have been unable to resolve such
         matters, the provisions of Section 5.9 shall govern.

                  (c) If, at any time following ATS' approval of the
         Environmental Reports, ATS or the Environmental Company notifies Seller
         of any additional environmental matter, the parties shall have
         substantially the same rights and obligations as are set forth in
         paragraphs (a) and (b) above with respect to the affected site.

         5.9 Resolution of Title and Environmental Disapproved Matters. In the
event ATS and Seller are unable to resolve matters with respect to disapproved
title matters pursuant to the provisions of Section 5.7 and/or with respect to
disapproved environmental matters pursuant to the provisions of Section 5.8, the
rights and obligations of the parties with respect to such matters shall
thereafter be as follows:

                                      -20-

<PAGE>

                  (a) In the event that the aggregate cost reasonably estimated
         by the parties (or, in the event they are unable to agree, the Title
         Company and the Environmental Company) to eliminate the disapproved
         title matters and eliminate and remedy the disapproved environmental
         matters with respect to the Disapproved Sites (the "Disapproved Cost
         Amount") is not greater than $500,000 with respect to any particular
         Disapproved Site (the "Maximum Site Disapproved Cost Amount") and not
         greater than $2,000,000 for all Disapproved Sites (the "Maximum
         Disapproved Cost Amount"), then ATS shall have the right to require
         Seller to remedy all such matters (including, at ATS' election, after
         the Closing in which event Seller shall indemnify and hold harmless ATS
         with respect to such remedy and shall place in escrow with the Title
         Company a sum sufficient to effect such remedy but not in excess of the
         limitations set forth in this paragraph) and to proceed with the
         Closing;

                  (b) In the event that the Disapproved Cost Amount is greater
         than the Maximum Disapproved Cost Amount, then ATS shall have the right
         to require Seller to remedy all such matters (including, at ATS'
         election, after the Closing in which event Seller shall indemnify and
         hold harmless ATS with respect to such remedy and shall place in escrow
         with the Title Company a sum sufficient to effect such remedy but not
         in excess of the limitations set forth in paragraph (a) of this
         Section) and to proceed with the Closing; provided, however, that under
         such circumstances, Seller shall have the right to elect not to effect
         such remedy with respect to (i) any particular Disapproved Site if the
         Disapproved Cost Amount for such Disapproved Site exceeds the Maximum
         Site Disapproved Cost Amount and (ii) one or more of the Disapproved
         Sites (to the extent there is a choice, selected by Seller with the
         approval of ATS, such approval not to be unreasonably withheld), the
         aggregate Disapproved Cost Amount of which is not greater than the
         excess of the Disapproved Cost Amount over the Maximum Disapproved Cost
         Amount, in which event, unless Seller or ATS shall, in its sole and
         absolute discretion, have agreed to bear the excess determined pursuant
         to clause (i) and/or (ii) of this paragraph or the parties shall have
         otherwise agreed in writing, such Disapproved Site or Sites shall be
         eliminated from the Seller Assets and the Purchase Price shall be
         reduced in accordance with the provisions of paragraph (c) below; and

                  (c) In the event one or more Disapproved Sites is eliminated
         from the Seller Assets, the parties shall negotiate in good faith in an
         attempt to agree upon the fair market value of such Disapproved Sites,
         which value shall be based on the Purchase Price and shall assume that
         there were no disapproved title and/or environmental matters with
         respect to such Disapproved Sites. In the event the parties are unable
         within twenty (20) business days to agree upon such fair market value,
         the matter shall be submitted to binding, nonappealable arbitration in
         accordance with the federal commercial arbitration rules of the
         American Arbitration Association before the Philadelphia chapter, with
         each party paying its own legal and other expenses.

         Anything in this Section or elsewhere in this Agreement to the contrary
notwithstanding, the costs required to be expended by Seller pursuant to the
provisions of this Section (whether prior or subsequent to the Closing) shall
not affect the obligations of Seller pursuant to the provisions of Article 8.

         5.10 Post-Closing Covenants and Agreements of the Parties. From and
after the consummation of the Transactions, ATS and Seller covenant and agree as
follows:

                  (a) ATS shall afford to Seller, and Seller shall afford to
         ATS, access to each of their (and, in the case of Seller, any of the
         Seller Subsidiaries) respective employees who were (or in 

                                      -21-

<PAGE>

         the case of Seller who remain) employees of Seller (or any of the
         Seller Subsidiaries) on the Closing Date to the end that such employees
         are available to provide assistance, consultation and historical
         background to the requesting party; provided, however, that neither ATS
         nor Seller shall have any such obligation after the expiration of one
         (1) year from the Closing Date or to the extent that it would unduly
         interfere with the continuing conduct by ATS or Seller of their
         respective businesses; and

                  (b) ATS shall afford to Seller, and Seller shall afford to
         ATS, access to all books and records delivered to ATS or retained by
         Seller (or any of the Seller Subsidiaries), as the case may be,
         relating to periods prior to the Closing Date, in order to enable
         Seller or ATS, as the case may be, to prepare all necessary Tax
         Returns, deal with Legal Actions or other Claims (including without
         limitation those of the Internal Revenue Service) or personnel matters
         or for any other reasonable purposes, subject, however, in all events,
         to the provisions of Section 5.1 with respect to confidentiality.


                                    ARTICLE 6

                               CLOSING CONDITIONS
                               ------------------

         6.1 Conditions to Obligations of Each Party. The respective obligations
of each party to effect the Transactions shall, except as hereinafter provided
in this Section, be subject to the satisfaction at or prior to the Closing Date
of the following conditions, any or all of which may be waived in writing, in
whole or in part, to the extent permitted by Applicable Law:

                  (a) As of the Closing Date, no Legal Action shall be pending
         before or threatened in writing by any Authority seeking to enjoin,
         restrain, prohibit or make illegal or to impose any materially Adverse
         conditions in connection with, the consummation of the Transactions, it
         being understood and agreed that a written request by any Authority for
         information with respect to the Transactions, which information could
         be used in connection with such Legal Action, shall not in itself be
         deemed to be a threat of any such Legal Action; and

                  (b) All authorizations, consents, waivers, orders or approvals
         required to be obtained from all Authorities, and all filings,
         submissions, registrations, notices or declarations required to be made
         by ATS and Seller with any Authority, prior to the consummation of the
         Transactions, shall have been obtained from, and made with, all such
         Authorities, except for such authorizations, consents, waivers, orders,
         approvals, filings, registrations, notices or declarations, if any, as
         are set forth in Section 6.1(b) of the Seller Disclosure Schedule or
         the failure to obtain or make would not, in the reasonable business
         judgment of ATS, have a material Adverse effect on the Seller Assets or
         the Seller Business.

         6.2 Conditions to Obligations of ATS. The obligation of ATS to effect
the Transactions shall be subject to the satisfaction of the following
conditions, any or all of which may be waived in writing, in whole or in part,
to the extent permitted by Applicable Law:

                  (a) All agreements, certificates, opinions and other documents
         required to be delivered pursuant to the provisions of this Agreement
         shall be reasonably satisfactory in form, scope and substance to ATS
         and its counsel, and ATS and its counsel shall have received all
         information and copies of all documents, including records of corporate
         proceedings, which they may reasonably 

                                      -22-
<PAGE>

         request in connection therewith, such documents where appropriate to be
         certified by proper Authorities or corporate officers;

                  (b) Seller shall have furnished ATS and, at ATS' request, any
         bank or other financial institution providing credit to ATS, with a
         favorable opinion, dated the Closing Date of Saul, Ewing, Remick &
         Saul, counsel for Seller and the Seller Subsidiaries, with respect to
         the matters set forth in Sections 3.1 and 3.7, and such other matters
         arising after the date of this Agreement and incident to the
         Transactions, as ATS or its counsel or its counsel may reasonably
         request or which may be reasonably requested by any such bank or
         financial institution or their respective counsel;

                  (c) The representations and warranties of Seller contained in
         this Agreement shall be true and correct in all material respects at
         and as of the Closing Date with the same force and effect as though
         made on and as of such date except those which speak as of a certain
         date which shall continue to be true and correct in all material
         respects as of such date on the Closing Date (including without
         limitation giving effect to any later obtained knowledge of Seller or
         ATS, except as otherwise specifically provided herein); each and all of
         the agreements and conditions to be performed or satisfied by Seller
         hereunder at or prior to the Closing Date shall have been duly
         performed or satisfied in all material respects; and Seller shall have
         furnished ATS with such certificates and other documents evidencing the
         truth of such representations, warranties, covenants and agreements and
         the performance of such agreements or conditions as ATS or its counsel
         shall have reasonably requested;

                  (d) Except for such authorizations, consents, waivers, orders
         or approvals the failure of which to obtain would not, in the
         reasonable business judgment of ATS, have a material Adverse effect on
         the Seller Assets or the Seller Business, all authorizations, consents,
         waivers, orders or approvals required by the provisions of this
         Agreement to be obtained from all Persons (other than Authorities)
         prior to the consummation of the Transactions, including without
         limitation those required by the provisions of this Agreement in order
         to vest fully in ATS all right, title and interest in and to all of the
         Seller Assets and the Seller Business (including without limitation all
         Private Authorizations, Leases and Material Agreements of Seller and,
         at the cost and expense of Seller, all modifications of Leases and
         other Contractual Obligations which ATS shall within ten (10) business
         days of the date hereof advise Seller in writing are a requirement of
         Closing) and the full enjoyment thereof shall have been obtained,
         without the imposition, individually or in the aggregate, of any
         condition or requirement which could materially Adversely affect ATS;

                  (e) Between the date of this Agreement and the Closing Date,
         there shall not have occurred and be continuing any material Adverse
         change in Seller from that reflected in the most recent Seller
         Financial Statements which Materially and Adversely effects the
         transactions contemplated hereby except for events affecting the tower
         rental and video transmission industry generally; as of the Closing
         Date, the Governmental Authorizations with respect to the ownership or
         operation of the Seller Assets or the conduct of the Seller Business
         shall not have been materially and Adversely affected by any act, or
         failure to act, of Seller;

                  (f) Seller and each Seller Subsidiary shall have delivered or
         cause to be delivered to ATS all of the Collateral Documents and other
         agreements, documents and instruments required to be delivered by
         Seller and each Seller Subsidiary to ATS at or prior to the Closing
         pursuant to the terms of this Agreement;

                                      -23-

<PAGE>

                  (g) ATS shall have received from its independent accountants
         (i) an unqualified report (as to the scope of the audit, access to the
         books and records and the cooperation of management) on the financial
         statements (consisting of balance sheets for each of the fiscal years
         ended December 31, 1995 and 1996 and statements of operations and cash
         flow for each of the three years in the period ended December 31, 1996)
         of the Seller Business, which financial statements shall have been
         prepared in conformity with GAAP and Regulation S-X under the
         Securities Act, or (ii) such other documentation as shall be reasonably
         satisfactory to ATS indicating that such an unqualified report could be
         issued if requested by ATS;

                  (h) As of the Closing Date, except as otherwise set forth in
         Section 3.7(a) of the Seller Disclosure Schedule, no Legal Action shall
         be pending before or threatened in writing by any Authority which
         might, in the reasonable business judgment of ATS, based upon the
         advice of counsel, have a material Adverse effect on the Seller Assets
         and the Seller Business, it being understood and agreed that a written
         request by any Authority for information with respect to the
         Transactions, which information could be used in connection with such
         Legal Action, shall not be deemed to be a threat of any such Legal
         Action;

                  (i) All Environmental Reports obtained by the parties prior to
         the Closing Date pursuant to the provisions of Section 5.8 hereof shall
         be approved or deemed approved by ATS in the manner described in
         Section 5.8;

                  (j) Seller and each of the individuals named therein shall
         have executed and delivered to ATS an agreement substantially in the
         form of Exhibit A attached hereto and made a part hereof (the "ATS
         Noncompetition Agreements");

                  (k) ATS shall have received standard CLTA title insurance
         policies insuring ATS' fee or leasehold interests in all Insured Real
         Property, subject only to Approved Title Conditions; and

                  (l) Seller or the applicable Seller Subsidiary shall have
         delivered to ATS leases, subleases and license agreements with respect
         to certain of the Seller towers or tower sites as indicated in Section
         6.2(l) of the Seller Disclosure Schedule, all on the terms and
         conditions set forth in the applicable document included as part of
         Exhibit B attached hereto and made a part hereof (collectively, the
         "Collateral Real Estate Documents").

         6.3 Conditions to Obligations of Seller. The obligation of Seller to
effect the Transactions shall be subject to the satisfaction of the following
conditions, any or all of which may be waived in writing, in whole or in part,
to the extent permitted by Applicable Law:

                  (a) All agreements, certificates, opinions and other documents
         required to be delivered pursuant to the provisions of this Agreement
         shall be reasonably satisfactory in form, scope and substance to Seller
         and its counsel, and Seller and its counsel shall have received all
         information and copies of all documents, including records of corporate
         proceedings, which they may reasonably request in connection therewith,
         such documents where appropriate to be certified by proper Authorities
         or corporate officers;

                  (b) ATS shall have furnished Seller and, at Seller's request,
         any bank or other financial institution providing credit to Seller,
         with favorable opinions, dated the Closing Date of Sullivan & Worcester
         LLP, counsel for ATS, with respect to the matters set forth in Section
         4.1 and 4.3 and with respect to such other matters arising after the
         date of this Agreement and 

                                      -24-
<PAGE>

         incident to the Transactions, as Seller or its counsel may reasonably
         request or which may be reasonably requested by any such bank or
         financial institution or their respective counsel;

                  (c) The representations and warranties of ATS contained in
         this Agreement or otherwise made in writing by it or on its behalf
         pursuant hereto or otherwise made in connection with the Transactions
         shall be true and correct in all material respects at and as of the
         Closing Date with the same force and effect as though made on and as of
         such date except those which speak as of a certain date which shall
         continue to be true and correct in all material respects as of such
         date on the Closing Date (including without limitation giving effect to
         any later obtained knowledge of Seller or ATS, except as otherwise
         specifically provided herein); each and all of the agreements and
         conditions to be performed or satisfied by ATS hereunder at or prior to
         the Closing Date shall have been duly performed or satisfied in all
         material respects; and ATS shall have furnished Seller with such
         certificates and other documents evidencing the truth of such
         representations, warranties, covenants and agreements and the
         performance of such agreements or conditions as Seller or its counsel
         shall have reasonably requested;

                  (d) ATS shall have delivered or cause to be delivered to
         Seller all of the Collateral Documents and other agreements, documents
         and instruments required to be delivered by ATS to Seller at or prior
         to the Closing pursuant to the terms of this Agreement;

                  (e) Except to the extent, if any, specifically set forth in
         Section 6.2(d) of the Seller Disclosure Schedule, all authorizations,
         consents, waivers, orders or approvals required by the provisions of
         this Agreement to be obtained from all Persons (other than Authorities)
         prior to the consummation of the Transactions, including without
         limitation those required by the provisions of this Agreement in order
         to vest fully in ATS all right, title and interest in and to all of the
         Seller Assets and the Seller Businesses (including without limitation
         all Private Authorizations, Leases and Material Agreements of Seller
         and, at the cost and expense of Seller, all modifications of Leases and
         Contractual Obligations heretofore requested by ATS and set forth in
         Section 6.2(d) of the Seller Disclosure Schedule) and the full
         enjoyment thereof shall have been obtained, without the imposition,
         individually or in the aggregate, of any condition or requirement which
         could materially and Adversely affect Seller;

                  (f) ATS shall have delivered to Seller or the applicable
         Seller Subsidiary the Collateral Real Estate Documents;

                  (g) The Purchase Price shall have been paid as set forth in
         Section 2.3; and

                  (h) As of the Closing Date, no Legal Action shall be pending
         before or threatened in writing by any Authority which might, in the
         reasonable business judgment of Seller, based upon the advice of
         counsel, have a material adverse effect on ATS, it being understood and
         agreed that a written request by any Authority for information with
         respect to the Transactions, which information could be used in
         connection with such Legal Action, shall not be deemed to be a threat
         of any such Legal Action.

                                      -25-
<PAGE>

                                    ARTICLE 7

                        TERMINATION, AMENDMENT AND WAIVER
                        ---------------------------------

         7.1      Termination.  This Agreement may be terminated at any time 
                  prior to the Closing Date:

                  (a) by mutual written consent of Seller and ATS;

                  (b) by either ATS or Seller if any permanent injunction,
         decree or judgment by any Authority preventing the consummation of the
         Transactions shall have become final and nonappealable; or

                  (c) by Seller in the event (i) Seller is not in material
         breach of this Agreement and none of its representations or warranties
         shall have become and continue to be untrue in any material respect,
         and (ii) ATS is in material breach of this Agreement or any of its
         representations or warranties shall have become and continue to be
         untrue in any material respect, and such a breach or untruth exists and
         is not capable of being cured by and will prevent or delay consummation
         of the Transactions by or beyond the Termination Date; or

                  (d) by ATS in the event (i) ATS is not in material breach of
         this Agreement and none of its representations or warranties shall have
         become and continue to be untrue in any material respect, and (ii)
         Seller is in material breach of this Agreement or any of its
         representations or warranties shall have become and continue to be
         untrue in any material respect, and such a breach or untruth exists and
         is not capable of being cured by and will prevent or delay consummation
         of the Transactions by or beyond the Termination Date; or

                  (e) by ATS in the event of a failure of the condition set
         forth in Section 6.2(i) or 6.2(k).

         The term "Termination Date" shall mean March 31, 1998 or such other
date as the parties may, from time to time, mutually agree.

         The right of ATS or Seller to terminate this Agreement pursuant to this
Section shall remain operative and in full force and effect regardless of any
investigation made by or on behalf of either party, any Person controlling any
such party or any of their respective Representatives whether prior to or after
the execution of this Agreement.

         7.2      Effect of Termination.
                  ---------------------

         (a) Except as provided in Sections 5.1 (with respect to
confidentiality), 5.3, 9.3 and 9.5 and this Section, in the event of the
termination of this Agreement pursuant to Section 7.1, or in the event the
Transactions shall not have been consummated prior to the end of business on the
Termination Date, this Agreement shall forthwith become void, there shall be no
liability on the part of either party, or any of their respective shareholders,
officers or directors, to the other and all rights and obligations of either
party shall cease; provided, however, that such termination shall not relieve
either party from liability for any misrepresentation or breach of any of its
warranties, covenants or agreements set forth in this Agreement.

         (b) Each of Seller and ATS agrees that, in the event either party shall
seek specific performance of this Agreement in accordance with the provisions of
Section 9.5, (i) any breach by it shall 

                                      -26-
<PAGE>

be deemed to be detrimental to the other, (ii) it will not oppose any temporary
restraining order or other form of injunctive relief sought by the other party,
and (iii) in the case of the Seller, it will hold the proceeds of any sale or
other disposition of all or any part of the Seller Assets or the Seller Business
in constructive trust for the benefit of ATS.

         (c) In the event this Agreement is terminated pursuant to the
provisions of Section 7.1(a), 7.1(b) or 7.1(e), except as provided in Section
7.2(a), neither of the parties shall have any further rights, obligations or
remedies.


                                    ARTICLE 8

                                 INDEMNIFICATION
                                 ---------------

         8.1 Survival. The representations and warranties of the parties
contained in or made pursuant to this Agreement or any Collateral Document shall
survive the Closing and shall remain operative and in full force and effect for
a period of (a) one (1) year after the Closing Date or (b) the applicable
statute of limitations in the case of matters of a nature referred to in
Sections 3.1, 3.7(a), 3.11, 3.18 and 4.1, regardless of any investigation or
statement as to the results thereof made by or on behalf of any party hereto.
The covenants and agreements of the parties contained in or made pursuant to
this Agreement or any Collateral Document shall survive the Closing and shall
remain operative and in full force and effect for one (1) year unless otherwise
herein expressly provided to the contrary. The term "Indemnity Period" shall
mean the applicable period with respect to which a representation, warranty,
covenant or agreement survives the Closing as provided in this Section. No claim
for indemnification, other than with respect to fraud or intentional or willful
breach or misrepresentation, may be asserted after the expiration of the
Indemnity Period. Notwithstanding anything herein to the contrary, any
representation, warranty, covenant and agreement which arises and is the subject
of a Claim which is asserted in writing prior to the expiration of the
applicable Indemnity Period shall survive with respect to such Claim or any
dispute with respect thereto until the final resolution thereof.

         8.2 Indemnification. Each of Seller and ATS (the "indemnifying party")
agrees that on and after the Closing it shall indemnify and hold harmless the
other (the "indemnified party") from and against any and all damages, claims,
losses, expenses, costs, obligations and liabilities, including without
limitation liabilities for all reasonable attorneys', accountants' and experts'
fees and expenses including those incurred to enforce the terms of this
Agreement or any Collateral Document executed by it (collectively, "Loss and
Expense"), suffered, directly or indirectly, by the indemnified party by reason
of, or arising out of:

                  (a) any material breach of representation or warranty made by
         the indemnifying party pursuant to this Agreement or any Collateral
         Document executed by it or any failure by the indemnifying party to
         perform or fulfill any of its respective covenants or agreements set
         forth in this Agreement or any Collateral Document executed by it; or

                  (b) in the case of Seller as the indemnifying party, the
         failure of Seller or any Seller Subsidiary to comply with Bulk Sales
         law of any applicable jurisdiction; or

                  (c) in the case of Seller as the indemnifying party, by reason
         of, or arising out of, (i) Seller Nonassumed Obligations and/or (ii)
         the ownership and operation of the Seller Assets and the Seller
         Business prior to the Closing Date; or

                                      -27-


<PAGE>

                  (d) in the case of ATS as the indemnifying party, by reason
         of, or arising out of, (i) Seller Assumed Obligations and/or (ii) the
         ownership and operation of the Seller Assets and the Seller Business
         from and after the Closing Date, except for Events arising prior to or
         existing on the Closing Date, unless they are part of the Seller
         Assumed Obligations, and/or (iii) Section 5.2(c) financial statements,
         except to the extent Seller is liable to ATS pursuant to the provisions
         of paragraph (a) of this Section.

         8.3      Limitation of Liability.
                  -----------------------

         (a) Notwithstanding the provisions of Section 8.2, after the Closing,
except as otherwise provided in Section 8.6, each indemnified party's rights to
indemnification shall be subject to the following limitations: (i) the
indemnified party shall be entitled to recover its Loss and Expense in respect
of any Claim only in the event that the aggregate Loss and Expense for all
Claims exceeds, in the aggregate, $50,000, in which event the indemnified party
shall be entitled to recover all such Loss and Expense (including without
limitation such $50,000), and (ii) in no event shall the aggregate amount
required to be paid by each indemnifying party pursuant to the provisions of
this Article exceed the greater of (x) $1,000,000 or (y) the excess of (I)
$2,500,000 over the (II) the amount paid by such indemnifying party pursuant to
the provisions of Section 5.9, except for any Loss or Expense arising out of
matters of a nature referred to in Sections 3.1 and 4.1 as to which the
limitations set forth in this clause (ii) shall not apply.

         (b) In the case any event shall occur which would otherwise entitle
either party to assert a claim for indemnification hereunder, no Loss and
Expense shall be deemed to have been sustained by such party to the extent of
any proceeds received by such party from any insurance policies with respect
thereto.

         8.4 Notice of Claims. If an indemnified party believes that it has
suffered or incurred any Loss and Expense, it shall notify the indemnifying
party promptly in writing, and in any event within the applicable time period
specified in Section 8.1, describing such Loss and Expense, all with reasonable
particularity and containing a reference to the provisions of this Agreement in
respect of which such Loss and Expense shall have occurred. If any Legal Action
is instituted by a third party with respect to which an indemnified party
intends to claim any liability or expense as Loss and Expense under this
Article, such indemnified party shall promptly notify the indemnifying party of
such Legal Action, but the failure to so notify the indemnifying party shall not
relieve such indemnifying party of its obligations under this Article, except to
the extent such failure to notify materially prejudices such indemnifying
party's ability to defend against such Claim.

         8.5 Defense of Third Party Claims. The indemnifying party shall have
the right to conduct and control, through counsel of their own choosing,
reasonably acceptable to the indemnified party, any third party Legal Action or
other Claim, but the indemnified party may, at its election, participate in the
defense thereof at its sole cost and expense; provided, however, that if the
indemnifying party shall fail to defend any such Legal Action or other Claim,
then the indemnified party may defend, through counsel of its own choosing, such
Legal Action or other Claim, and (so long as it gives the indemnifying party at
least fifteen (15) days' notice of the terms of the proposed settlement thereof
and permits the indemnifying party to then undertake the defense thereof) settle
such Legal Action or other Claim and to recover the amount of such settlement or
of any judgment and the reasonable costs and expenses of such defense. The
indemnifying party shall not compromise or settle any such Legal Action or other
Claim without the prior written consent of the indemnified party, which consent
shall not unreasonably be withheld, delayed or conditioned if the terms and
conditions of such compromise or settlement proposed 

                                      -28-
<PAGE>

by the indemnifying party and agreed to in writing by the claimant in such Legal
Action or other Claim (the "Settlement Proposal") (a) include a full release of
the indemnified party from the Legal Action or other Claim which is the subject
of the Settlement Proposal, and (b) if the indemnified party is ATS, do not
include any term or condition which would restrict in any material manner the
continued ownership or operations of the Seller Assets or the conduct of the
Seller Business in substantially the manner then being theretofore owned,
operated and conducted by ATS.

         8.6 Exclusive Remedy. Except for fraud or willful or intentional
misrepresentation or breach of warranty, covenant or agreement or as otherwise
provided in Section 9.5, the indemnification provided in this Article shall be
the sole and exclusive post-Closing remedy available to either party against the
other party for any Claim under this Agreement.


                                    ARTICLE 9

                               GENERAL PROVISIONS
                               ------------------

         9.1 Amendment. This Agreement may be amended from time to time by the
parties hereto at any time prior to the Closing Date but only by an instrument
in writing signed by the parties hereto.

         9.2 Waiver. At any time prior to the Closing Date, except to the extent
not permitted by Applicable Law, ATS or Seller may extend the time for the
performance of any of the obligations or other acts of the other, subject,
however, to the provisions with respect to the Termination Date, waive any
inaccuracies in the representations and warranties of the other contained herein
or in any document delivered pursuant hereto, and waive compliance by the other
with any of the agreements, covenants or conditions contained herein. Any such
extension or waiver shall be valid only if set forth in an instrument in writing
signed by the party or parties to be bound thereby.

         9.3 Fees, Expenses and Other Payments. All costs and expenses incurred
in connection with any transfer taxes, sales taxes, recording or documentary
taxes, stamps or other charges levied by any Authority in connection with this
Agreement and the consummation of the Transactions shall be borne equally by
Seller and ATS. All costs of preliminary title reports for Real Property
constituting a part of the Seller Assets shall be borne by Seller. All costs of
title insurance and environmental studies shall be borne by ATS. All other costs
and expenses incurred in connection with this Agreement and the consummation of
the Transactions, including without limitation Hart-Scott-Rodino filing fees,
fees and disbursements of counsel, financial advisors and accountants incurred
by the parties hereto, shall be borne solely and entirely by the party which has
incurred such costs and expenses.

         9.4 Notices. All notices and other communications which by any
provision of this Agreement are required or permitted to be given shall be given
in writing and shall be (a) mailed by first-class or express mail, or by
recognized courier service, postage prepaid, (b) sent by telecopy or other form
of rapid transmission, confirmed by mailing (by first class or express mail, or
by recognized courier service, postage prepaid) written confirmation at
substantially the same time as such rapid transmission, or (c) personally
delivered to the receiving party (which if other than an individual shall be an
officer or other responsible party of the receiving party). All such notices and
communications shall be mailed, sent or delivered as follows:

                                      -29-
<PAGE>

     (a)      If to ATS:

              116 Huntington Avenue
              Boston, Massachusetts 02116
              Attention:   Joseph L. Winn, Chief Financial Officer
              Telecopier No.:  (617) 375-7575

              with a copy to:

              Sullivan & Worcester LLP
              One Post Office Square
              Boston, Massachusetts 02109
              Attention:  Norman A. Bikales, Esq.
              Telecopier No.:  (617) 338-2880

     (b)      If to Seller:

              200 Cresson Boulevard
              P.O. Box 989
              Oaks, Pennsylvania 19456-0989
              Attention: Samuel W. Morris, Jr., Vice President-General Counsel
              Telecopier No.:  (616) 650-3061

              with a copy to:

              Saul, Ewing, Remick & Saul
              3800 Centre Square West
              Philadelphia, Pennsylvania  19102
              Attention: Thomas K. Pasch, Esq.
              Telecopier No.: (215) 972-7725

or to such other person(s), telex or facsimile number(s) or address(es) as the
party to receive any such communication or notice may have designated by written
notice to the other party.

         9.5 Specific Performance; Other Rights and Remedies. Each party
recognizes and agrees that in the event the other party should refuse to perform
any of its obligations under this Agreement or any Collateral Document, the
remedy at law would be inadequate and agrees that for breach of such provisions,
each party shall, in addition to such other remedies as may be available to it
at law or in equity or as provided in Article 7, be entitled to injunctive
relief and to enforce its rights by an action for specific performance to the
extent permitted by Applicable Law. Each party hereby waives any requirement for
security or the post ing of any bond or other surety in connection with any
temporary or permanent award of injunctive, mandatory or other equitable relief.
Nothing herein contained shall be construed as prohibiting each party from
pursuing any other remedies available to it pursuant to the provisions of, and
subject to the limitations contained in, this Agreement for such breach or
threatened breach.

         9.6 Severability. If any term or provision of this Agreement shall be
held or deemed to be, or shall in fact be, invalid, inoperative, illegal or
unenforceable as applied to any particular case in any jurisdiction or
jurisdictions, or in all jurisdictions or in all cases, because of the
conflicting of any provision with any constitution or statute or rule of public
policy or for any other reason, such 

                                      -30-
<PAGE>

circumstance shall not have the effect of rendering the provision or provisions
in question invalid, inoperative, illegal or unenforceable in any other
jurisdiction or in any other case or circumstance or of rendering any other
provision or provisions herein contained invalid, inoperative, illegal or
unenforceable to the extent that such other provisions are not themselves
actually in conflict with such constitution, statute or rule of public policy,
but this Agreement shall be reformed and construed in any such jurisdiction or
case as if such invalid, inoperative, illegal or unenforceable provision had
never been contained herein and such provision reformed so that it would be
valid, operative and enforceable to the maximum extent permitted in such
jurisdiction or in such case. Notwithstanding the foregoing, in the event of any
such determination the effect of which is to affect materially and Adversely
either party, the parties shall negotiate in good faith to modify this Agreement
so as to effect the original intent of the parties as closely as possible to the
fullest extent permitted by Applicable Law in an acceptable manner to the end
that the Transactions are fulfilled and consummated to the maximum extent
possible.

         9.7 Counterparts. This Agreement may be executed in several
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument, binding upon all of the
parties. In pleading or proving any provision of this Agreement, it shall not be
necessary to produce more than one of such counterparts.

         9.8 Section Headings. The headings contained in this Agreement are for
reference purposes only and shall not in any way affect the meaning or
interpretation of this Agreement.

         9.9 Governing Law. The validity, interpretation, construction and
performance of this Agreement shall be governed by, and construed in accordance
with, the applicable laws of the United States of America and the laws of the
State of Delaware applicable to contracts made and performed in such State and,
in any event, without giving effect to any choice or conflict of laws provision
or rule that would cause the application of domestic substantive laws of any
other jurisdiction.

         9.10 Further Acts. Each party agrees that at any time, and from time to
time, before and after the consummation of the transactions contemplated by this
Agreement, it will do all such things and execute and deliver all such
Collateral Documents and other assurances, as any other party or its counsel
reasonably deems necessary or desirable in order to carry out the terms and
conditions of this Agreement and the transactions contemplated hereby or to
facilitate the enjoyment of any of the rights created hereby or to be created
hereunder.

         9.11 Entire Agreement. This Agreement (together with the Seller
Disclosure Schedule and the other Collateral Documents delivered in connection
herewith), constitutes the entire agreement of the parties and supersedes all
prior agreements and undertakings, both written and oral, between the parties,
with respect to the subject matter hereof, including without limitation that
certain letter of intent, dated May 16, 1997, between the parties.

         9.12 Assignment. This Agreement shall not be assignable by either party
and any such assignment shall be null and void, except that it shall inure to
the benefit of and by binding upon any successor to any party by operation of
law, including by way of merger, consolidation or sale of all or substantially
all of its assets, and ATS may assign its rights and remedies hereunder to any
bank or other financial institution which has loaned funds or otherwise extended
credit to it.

         9.13 Parties in Interest. This Agreement shall be binding upon and
inure solely to the benefit of each party, and nothing in this Agreement,
express or implied, is intended to or shall confer upon any 

                                      -31-
<PAGE>

Person any right, benefit or remedy of any nature whatsoever under or by reason
of this Agreement, except as otherwise provided in Section 9.12.

         9.14 Mutual Drafting. This Agreement is the result of the joint efforts
of Seller and ATS, and each provision hereof has been subject to the mutual
consultation, negotiation and agreement of the parties and there shall be no
construction against either party based on any presumption of that party's
involvement in the drafting thereof.

         9.15 Consent. Whenever this Agreement affords to a party the right to
consent to any act or request of another, such party shall not unreasonably
withhold, delay or condition such consent.

         IN WITNESS WHEREOF, ATS and Seller have caused this Agreement to be
executed as of the date first written above by their respective officers
thereunto duly authorized.

                                      American Tower Systems, Inc.


                                      By:  /s/ James S. Eisenstein
                                         --------------------------------------
                                           Name: James S. Eisenstein
                                           Title:   Chief Operating Officer

                                      Suburban Cable TV Co. Inc.


                                      By:  /s/ Harry F. Brooks
                                         --------------------------------------
                                           Name: Harry F. Brooks
                                           Title:   Executive Vice President


                                      -32-
<PAGE>

                                                                    APPENDIX A

                                   DEFINITIONS

         As used in this Agreement, unless the context otherwise requires, the
following capitalized terms (or any variant in the form thereof) have the
following respective meanings. Terms defined in the singular shall have a
comparable meaning when used in the plural, and vice versa, and the reference to
any gender shall be deemed to include all genders. Unless otherwise defined or
the context otherwise clearly requires, terms for which meanings are provided
herein shall have such meanings when used in the Seller Disclosure Schedule, and
each Collateral Document executed or required to be executed pursuant hereto or
thereto or otherwise delivered, from time to time, pursuant hereto or thereto.
References to "hereof", "herein" or similar terms are intended to refer to the
Agreement as a whole and not a particular Section, and references to "this
Section" are intended to refer to the entire Section and not a particular
subsection thereof. The term "either party" shall, unless the context otherwise
requires, refer to Seller and ATS.

         Acceptance Notice shall have the meaning given to it in Section 2.2(c).

         Accounts Receivable shall mean (a) any and all rights to the payment of
money or other forms of consideration of any kind at any time now or hereafter
owing or to be owing to Seller attributable to the ownership or operation of the
Seller Business (whether classified under the Uniform Commercial Code of any
state as accounts, contract rights, chattel paper, general intangibles or
otherwise), including without limitation accounts receivable, letters of credit
and the right to receive payment thereunder, chattel paper, insurance proceeds,
contract rights, notes, drafts, instruments, documents, acceptances, and all
other debts, obligations and liabilities in whatever form now or hereafter owing
from any other Person, all guarantees, security and Liens for the payment of any
thereof, and all of Seller's rights to goods, now owned or hereafter acquired,
sold (delivered, undelivered, in transit or returned) which may be represented
thereby; and (b) all proceeds of any of the foregoing.

         Adverse, Adversely, when used alone or in conjunction with other terms
(including without limitation "affect," "change" and "effect") shall mean any
Event which is reasonably likely to (a) adversely affect the validity or
enforceability of this Agreement or the likelihood of consummation of the
Transactions, or (b) adversely affect the business, operations, management,
properties or prospects, or the financial condition or results of operation of
the Seller Business, or (c) impair Seller's ability to fulfill its obligations
under the terms of this Agreement, or (d) adversely affect the aggregate rights
and remedies of ATS under this Agreement. Notwithstanding the foregoing, and
anything in this Agreement to the contrary notwithstanding, any Event generally
affecting the economy or the tower communications business or the video business
shall not be deemed to constitute such a change, affect or effect.

         Additional Title Matter shall have the meaning given to it in Section
5.7.

         Affiliate, Affiliated shall mean, with respect to any Person, (a) any
other Person at the time directly or indirectly controlling, controlled by or
under direct or indirect common control with such Person, (b) any other Person
of which such Person at the time owns, or has the right to acquire, directly or
indirectly, twenty percent (20%) or more of any class of the capital stock or
beneficial interest, (c) any other Person which at the time owns, or has the
right to acquire, directly or indirectly, twenty percent (20%) or more of any
class of the capital stock or beneficial interest of such Person, (d) any
executive officer or director of such Person, (e) with respect to any
partnership, joint venture or similar Entity, any general partner thereof, and
(f) when used with respect to an individual, shall include any member of such
individual's immediate family or a family trust; provided, however, that for
purposes of this Agreement, 

                                       A-1

<PAGE>


Tele-Communications, Inc. and its direct and indirect Subsidiaries shall not be
treated as an Affiliate of Seller.

         Agreement shall mean this Agreement as originally in effect, including,
unless the context otherwise specifically requires, this Appendix A, the Seller
Disclosure Schedule and all exhibits hereto, and as any of the same may from
time to time be supplemented, amended, modified or restated in the manner herein
or therein provided.

         Applicable Law shall mean any Law of any Authority, whether domestic or
foreign, including without limitation the FCA and Environmental Laws, to which a
Person is subject or by which it or any of its business or operations is subject
or any of its property or assets is bound.

         Approved Title Conditions shall mean any one or more of the following:
(a) Liens for real property taxes and assessments not then delinquent; (b)
matters of title approved by ATS or deemed approved in accordance with the
provisions of Section 5.7; and (c) matters of title created following the date
of this Agreement by or with the written consent of ATS.

         Assets shall mean the business and the tangible and intangible assets
used in connection with the conduct of the Seller Business, which business and
assets are being exchanged, transferred or otherwise conveyed hereunder,
including without including without limitation the following:

                  (a) the Personal Property;

                  (b) the Real Property;

                  (c) the Governmental Authorizations;

                  (d) the Private Authorizations;

                  (e) the Contracts (other than the Seller Nonassumed 
         Obligations);

                  (f) all Intellectual Property and other proprietary
         information, which relate to the Seller Business, including without
         limitation, technical information and data, machinery and equipment
         warranties, maps, computer discs and tapes, plans, diagrams, blueprints
         and schematics, including filings with all Authorities which relate to
         the Seller Business;

                  (g) all claims, choses in action and rights under warranties 
         relating to the Seller Business or any of the Seller Assets;

                  (h) all books and records relating to the ownership or
         operation of the Seller Assets or the conduct of the Seller Business,
         including executed copies of Leases, Material Agreements and other
         written Contracts, and all records required by Applicable Law to be
         kept, subject to the right of the conveying party to have such books
         and records made available to it for such time as may be reasonably
         required in connection with audits, defense or prosecution of lawsuits,
         or other legitimate business purposes. The records described herein
         shall not include corporate seals, certificates of incorporation,
         minute books, stock books, tax returns or other records having to do
         with the corporate organization of Seller; and

                                      A-2
<PAGE>

                  (i) any and all products, profits and proceeds of, and
         including without limitation any Claims with respect to, any of the
         foregoing;

provided, however, that notwithstanding the foregoing, the term Assets shall not
include any of the Excluded Assets.

         ATS shall have the meaning given to it in the Preamble.

         ATS' Environmental Notice shall have the meaning given to it in Section
5.8.

         ATS' Noncompetition Agreements shall have the meaning given to it in
Section 6.2(j).

         ATS' Title Notice shall have the meaning given to it in Section 5.7.

         Authority shall mean any governmental or quasi-governmental authority,
whether administrative, executive, judicial, legislative or other, or any
combination thereof, including without limitation any federal, state,
territorial, county, municipal or other government or governmental or
quasi-governmental agency, arbitrator, authority, board, body, branch, bureau,
central bank or comparable agency or Entity, commission, corporation, court,
department, instrumentality, master, mediator, panel, referee, system or other
political unit or subdivision or other Entity of any of the foregoing, whether
domestic or foreign., including without limitation the FCC.

         Benefit Arrangement shall mean any material benefit arrangement that is
not a Plan, including (a) any employment or consulting agreement (b) any
arrangement providing for insurance coverage or workers' compensation benefits,
(c) any incentive bonus or deferred bonus arrangement, (d) any arrangement
providing termination allowance, severance or similar benefits, (e) any equity
compensation plan, (f) any deferred compensation plan, and (g) any compensation
policy and practice, but only to the extent that it covers or relates to any
officer, employee or other Person involved in the ownership and operation of the
Assets or the conduct of the business of the Seller Business.

         CEA shall have the meaning given to it in Section 3.12.

         Claims shall mean any and all debts, liabilities, obligations, losses,
damages, deficiencies, assessments and penalties, together with all Legal
Actions, pending or threatened, claims and judgments of whatever kind and nature
relating thereto, and all fees, costs, expenses and disbursements (including
without limitation reasonable attorneys' and other legal fees, costs and
expenses) relating to any of the foregoing.

         Closing shall have the meaning given to it in Section 2.3.

         Closing Date shall have the meaning given to it in Section 2.3.

         COBRA shall mean the Consolidated Omnibus Budget Reconciliation Act of
1985, as amended, as set forth in Section 4980B of the Code and Part 6 of
Subtitle B of Title I of ERISA.

         Code shall mean the Internal Revenue Code of 1986, and the rules and
regulations thereunder, all as from time to time in effect, or any successor
law, rules or regulations, and any reference to any statutory or regulatory
provision shall be deemed to be a reference to any successor statutory or
regulatory provision.

                                      A-3
<PAGE>

         Collateral Documents shall mean the Collateral Real Estate Documents,
the ATS Noncompetition Agreements, the Nonassignable Contracts Agreement,
warranty deeds, bills of sale, assignments of intangibles, assumption agreements
with respect to the Seller Assumed Obligations, other instruments of conveyance
and assignment sufficient to vest in ATS title to all of the other Seller Assets
and the Seller Business, and any other agreement, certificate, contract,
instrument, notice, opinion or other document delivered pursuant to the
provisions of this Agreement or any Collateral Document.

         Collateral Real Estate Documents shall have the meaning given to it in
Section 6.2(m).

         Collection Period shall have the meaning given to it in Section 2.4.

         Contract, Contractual Obligation shall mean any agreement, arrangement,
commitment, contract, covenant, indemnity, undertaking or other obligation or
liability which involves the ownership or operation of the Seller Assets or the
conduct of the Seller Business.

         Control (including the terms "controlled," "controlled by" and "under
common control with") means the possession, directly or indirectly or as trustee
or executor, of the power to direct or cause the direction of the management or
policies of a Person, or the disposition of such Person's assets or properties,
whether through the ownership of stock, equity or other ownership, by contract,
arrangement or understanding, or as trustee or executor, by contract or credit
arrangement or otherwise.

         Disapproved Cost Amount shall have the meaning given to it in Section
5.9.

         Disapproved Environment Sites shall have the meaning given to it in
Section 5.8.

         Disapproved Sites shall have the meaning given to it in Section 5.7.

         Disapproved Title Sites shall have the meaning given to it in Section
5.7.

         Employment Arrangement shall mean, with respect to Seller, any
employment, consulting, retainer, severance or similar contract, agreement,
plan, arrangement or policy (exclusive of any which is terminable within thirty
(30) days without liability, penalty or payment of any kind by Seller or any
Affiliate), or providing for severance, termination payments, insurance coverage
(including any self-insured arrangements), workers compensation, disability
benefits, life, health, medical, dental or hospitalization benefits,
supplemental unemployment benefits, vacation or sick leave benefits, pension or
retirement benefits or for deferred compensation, profit-sharing, bonuses, stock
options, stock purchase or appreciation rights or other forms of incentive
compensation or post-retirement insurance, compensation or post-retirement
insurance, compensation or benefits, or any collective bargaining or other labor
agreement, whether or not any of the foregoing is subject to the provisions of
ERISA, but only to the extent that it covers or relates to any officer, employee
or other Person involved in the ownership or operation of the Seller Assets or
the conduct of the Seller Business.

         Encumber shall mean to suffer, accept, agree to or permit the
imposition of a Lien.

         Entity shall mean any corporation, firm, unincorporated organization,
association, partnership, limited liability company, trust (inter vivos or
testamentary), business trust, joint stock company, joint venture or other
organization, entity or business, whether acting in an individual, fiduciary or
other capacity, or any Authority.

                                      A-4
<PAGE>

         Environmental Company shall have the meaning given to it in Section
5.8.

         Environmental Law shall mean any Law relating to or otherwise imposing
liability or standards of conduct concerning pollution or protection of the
environment, including without limitation Laws relating to emissions,
discharges, releases or threatened releases of Hazardous Materials or other
chemicals or industrial pollutants, substances, materials or wastes into the
environment (including, without limitation, ambient air, surface water, ground
water, mining or reclamation or mined land, land surface or subsurface strata)
or otherwise relating to the manufacture, processing, generation, distribution,
use, treatment, storage, disposal, cleanup, transport or handling of pollutants,
contaminants, chemicals or industrial, toxic or hazardous substances, materials
or wastes. Environmental Laws shall include without limitation the Comprehensive
Environmental Response, Compensation and Liability Act (42 U.S.C. Section 6901
et seq.), the Hazardous Material Transportation Act (49 U.S.C. Section 1801 et
seq.), the Resource Conservation and Recovery Act (42 U.S.C. Section 6901 et
seq.), the Federal Water Pollution Control Act (33 U.S.C. Section 1251 et seq.),
the Clean Air Act (42 U.S.C. Section 7401 et seq.), the Toxic Substances Control
Act (15 U.S.C. Section 2601 et seq.), the Occupational Safety and Health Act (29
U.S.C. Section 651 et seq.), the Federal Insecticide Fungicide and Rodenticide
Act (7 U.S.C. Section 136 et seq.), and the Surface Mining Control and
Reclamation Act of 1977 (30 U.S.C. Section 1201 et seq.), and any analogous
federal, state, local or foreign, Laws, and the rules and regulations
promulgated thereunder all as from time to time in effect, and any reference to
any statutory or regulatory provision shall be deemed to be a reference to any
successor statutory or regulatory provision.

         Environmental Permit shall mean any Governmental Authorization required
by or pursuant to any Environmental Law.

         Environmental Reports shall have the meaning given to it in Section
5.8.

         ERISA shall mean the Employee Retirement Income Security Act of 1974,
and the rules and regulations thereunder, all as from time to time in effect, or
any successor law, rules or regulations, and any reference to any statutory or
regulatory provision shall be deemed to be a reference to any successor
statutory or regulatory provision.

         ERISA Affiliate shall mean any Person that is treated as a single
employer with Seller under Sections 414(b), (c), (m) or (o) of the Code or
Section 4001(b)(1) of ERISA.

         Event shall mean the existence or occurrence of any act, action,
activity, circumstance, condition, event, fact, failure to act, omission,
incident or practice, or any set or combination of any of the foregoing.

         Exchange Act shall mean the Securities Exchange Act of 1934, and the
rules and regulations thereunder, all as from time to time in effect, or any
successor law, rules or regulations, and any reference to any statutory or
regulatory provision shall be deemed to be a reference to any successor
statutory or regulatory provision.

         Excluded Assets shall have the meaning given to it in Section 2.1.

         FCA shall mean the Communication Act of 1934, and the rules and
regulations thereunder, all as from time to time in effect, or any successor
law, rules or regulations, and any reference to any statutory or regulatory
provision shall be deemed to be a reference to any successor statutory or
regulatory provision.

                                      A-5
<PAGE>

         FCC shall mean the Federal Communications Commission and shall include
any successor Authority.

         Final Order shall mean, with respect to any Authority, including
without limitation the FCC, one with respect to which no appeal, no stay, no
petition or application for rehearing, reconsideration, review or stay, whether
on motion of the applicable Authority or other Person or otherwise, and no other
Legal Action contesting such consent or approval, is in effect or pending and as
to which the time or deadline for filing any such appeal, petition or
application or other Legal Action has expired or, if filed, has been denied,
dismissed or withdrawn, and the time or deadline for instituting any further
Legal Action has expired.

         GAAP shall mean means, except to the extent that a deviation therefrom
is expressly required by this Agreement, such principles applied on a consistent
basis, (i) as set forth in Opinions of the Accounting Principles Board of the
American Institute of Certified Public Accountants ("AICPA") and/or in
statements of the Financial Accounting Standards Board that are applicable in
the circumstances as of the date in question, (ii) when not inconsistent with
such opinions and statements, as set forth in other AICPA publications and
guidelines and/or (iii) that otherwise arise by custom for the particular
industry, all as the same shall exist on the date of this Agreement.

         Governmental Authorizations shall mean all approvals, concessions,
consents, franchises, licenses, permits, plans, registrations and other
authorizations of all Authorities, including without limitation the Federal
Aviation Administration, in connection with the ownership or operation of the
Seller Assets or the conduct of the Seller Business.

         Governmental Filings shall mean all filings, including franchise and
similar Tax filings, and the payment of all fees, assessments, interest and
penalties associated with such filings, with all Authorities.

         Hart-Scott-Rodino Act shall mean the Hart-Scott-Rodino Improvement Act
of 1976, as from time to time in effect, or any successor law, and any reference
to any statutory provision shall be deemed to be a reference to any successor
statutory provision.

         Hazardous Materials shall mean and include any substance, material,
waste, constituent, compound, chemical, natural or man-made element or force (in
whatever state of matter): (a) the presence of which requires investigation or
remediation under any Environmental Law, or (b) that is defined as a "hazardous
waste" or "hazardous substance" under any Environmental Law; or (c) that is
toxic, explosive, corrosive, etiologic, flammable, infectious, radioactive,
carcinogenic, mutagenic or otherwise hazardous and is regulated by any
applicable Authority or subject to any Environmental Law.

         Indebtedness shall mean, with respect to any Person, (a) all items,
except items of capital stock or of surplus or of general contingency or
deferred tax reserves or any minority interest in any Subsidiary of such Person
to the extent such interest is treated as a liability with indeterminate term on
the consolidated balance sheet of such Person, which in accordance with GAAP
would be included in determining total liabilities as shown on the liability
side of a balance sheet of such Person, (b) all obligations secured by any Lien
to which any property or asset owned or held by such Person is subject, whether
or not the obligation secured thereby shall have been assumed, and (c) to the
extent not otherwise included, all Contractual Obligations of such Person
constituting capitalized leases and all obligations of such Person with respect
to Leases constituting part of a sale and leaseback arrangement.

                                      A-6
<PAGE>

         Indebtedness for Money Borrowed shall mean, with respect to Seller,
money borrowed and Indebtedness represented by notes payable and drafts accepted
representing extensions of credit, all obligations evidenced by bonds,
debentures, notes or other similar instruments, the maximum amount currently or
at any time thereafter available to be drawn under all outstanding letters of
credit issued for the account of such Person, all Indebtedness upon which
interest charges are customarily paid by such Person, and all Indebtedness
(including capitalized lease obligations) issued or assumed as full or partial
payment for property or services, whether or not any such notes, drafts,
obligations or Indebtedness represent Indebtedness for money borrowed, but shall
not include (a) trade payables, (b) expenses accrued in the ordinary course of
business, (c) customer advance payments and customer deposits received in the
ordinary course of business, or (d) conditional sales agreements not prohibited
by the terms of this Agreement.

         Insured Real Property shall have the meaning given to it in Section
5.7.

         Intangible Assets shall mean all assets and property lacking physical
properties the evidence of ownership of which must customarily be maintained by
independent registration, documentation, certification, recordation or other
means, and shall include, without limitation, concessions, copyrights,
franchises, license, patents, permits, service marks, trademarks, trade names,
and applications with respect to any of the foregoing, technology and know-how.

         Intellectual Property shall mean any and all research, information,
inventions, designs, procedures, developments, discoveries, improvements,
patents and applications therefor, trademarks and applications therefor, service
marks, trade names (including without limitation MicroNet and all variations
thereof), copyrights and applications therefor, logos, trade secrets, drawing,
plans, systems, methods, specifications, computer software programs, tapes,
discs and related data processing software (including without limitation object
and source codes) owned by such Person or in which it has an ownership interest
and all other manufacturing, engineering, technical, research and development
data and know-how made, conceived, developed and/or acquired by such Person,
which relate to the manufacture, production or processing of any products
developed or sold by such Person or which are within the scope of or usable in
connection with such Person's business as it may, from time to time, hereafter
be conducted or proposed to be conducted.

         Law shall mean any (a) administrative, judicial, legislative or other
action, code, consent decree, constitution, decree, directive, enactment,
finding, guideline, law, injunction, interpretation, judgment, order, ordinance,
policy statement, proclamation, promulgation, regulation, requirement, rule,
rule of law, rule of public policy, settlement agreement, statute, or writ of
any Authority, domestic or foreign; (b) the common law, or other legal or
quasi-legal precedent; or (c) arbitrator's, mediator's or referee's award,
decision, finding or recommendation; including, in each such case or instance,
any interpretation, directive, guideline or request, whether or not having the
force of law including, in all cases, without limitation any particular section,
part or provision thereof.

         Lease shall mean any lease of property, whether real, personal or
mixed, and all amendments thereto.

         Legal Action shall mean, with respect to any Person, any and all
litigation or legal or other actions, arbitrations, counterclaims,
investigations, proceedings or suits, at law or in arbitration, equity or
admiralty, whether or not purported to be brought on behalf of such Person,
affecting such Person or any of such Person's business, property or assets.

                                      A-7
<PAGE>
         Lien shall mean any of the following: mortgage; lien (statutory or
other); or other security agreement, arrangement or interest; hypothecation,
pledge or other deposit arrangement; assignment; charge; levy; executory
seizure; attachment; garnishment; encumbrance (including any easement,
exception, reservation or limitation, right of way, and the like); conditional
sale, title retention or other similar agreement, arrangement, device or
restriction; preemptive or similar right; any financing lease involving
substantially the same economic effect as any of the foregoing; the filing of
any financing statement under the Uniform Commercial Code or comparable law of
any jurisdiction; restriction on sale, transfer, assignment, disposition or
other alienation; or any option, equity, claim or right of or obligation to, any
other Person, of whatever kind and character.

         Loss and Expense shall have the meaning given to it in Section 8.2.

         Material Agreement shall mean, with respect to Seller, any Contractual
Obligation which (a) was not entered into in the ordinary course of business,
(b) was entered into in the ordinary course of business which (i) involved the
purchase, sale or lease of goods or materials, or purchase of services,
aggregating more than $50,000 during the last fiscal year, (ii) extends for more
than three (3) months, or (iii) is not terminable on thirty (30) days or less
notice without penalty or other payment, (c) involves a capitalized lease
obligation (d) is or otherwise constitutes a written agency, broker, dealer,
license, distributorship, sales representative or similar written agreement, (e)
accounted for more than three percent (3%) of the revenues of the Seller
Business in the last year or is likely to account for more than three percent
(3%) of revenues of the Seller Business during the current fiscal year, (f) is
with the United States Forest Service or any other Authority, or (g) involves
the management by Seller of any communication tower of any other Person.

         Maximum Disapproved Cost Amount shall have the meaning given to it in
Section 5.9.

         Maximum Site Disapproved Cost Amount shall have the meaning given to it
in Section 5.9.

         MicroNet L.P. shall mean MicroNet Delmarva Associates, L.P., a Delaware
limited partnership.

         Multiemployer Plan shall mean a Plan which is a "multiemployer plan"
within the meaning of Section 4001(a)3 of ERISA.

         Nonassignable Contracts shall have the meaning given to it in Section
2.2(c).

         Nonassignable Contracts Agreement shall have the meaning given to it in
Section 2.2(c).

         Organic Document shall mean, with respect to a Person which is a
corporation, its charter, its by-laws and all shareholder agreements, voting
trusts and similar arrangements applicable to any of its capital stock and, with
respect to a Person which is a partnership, its agreement and certificate of
partnership, any agreements among partners, and any management and similar
agreements between the partnership and any general partners (or any Affiliate
thereof).

         PBGC shall mean the Pension Benefit Guaranty Corporation and any Entity
succeeding to any or all of its functions under ERISA.

         Permitted Liens shall mean (a) Liens for current taxes not yet due and
payable, (b) such imperfections of title, easements, encumbrances and mortgages
or other Liens, if any, as are not, individually or in the aggregate,
substantial in character, amount or extent and do not materially detract 

                                      A-8
<PAGE>

from the value, or materially interfere with the present use, of the property
subject thereto or affected thereby, or otherwise materially impair the conduct
of the Seller Business, and (c) such other Liens as are permitted by the
provisions of this Agreement to be in place on the Closing Date.

         Person shall mean any natural individual or any Entity.

         Personal Property shall mean all of the machinery, equipment, tools,
vehicles, furniture, leasehold improvements, office equipment, plant, inventory,
spare parts and other tangible personal property which are owned or leased by
Seller or any Seller Subsidiary and used as of the date hereof in the conduct of
the Seller Business, plus such additions thereto and deletions therefrom arising
in the ordinary course of business between the date hereof and the Closing Date.

         Plan shall mean, with respect to any Person and at a particular time,
any employee benefit plan which is covered by ERISA and in respect of which such
Person or an ERISA Affiliate is (or, if such plan were terminated at such time,
would under Section 4069 of ERISA be deemed to be) an "employer" as defined in
Section 3(5) of ERISA, but only to the extent that it covers or relates to any
officer, employee or other Person involved in the ownership and operation of the
Assets or the conduct of the business of the Seller Business.

         Prepaid Expense shall mean any item which in accordance with GAAP would
be treated as an expense and which has been paid by Seller prior to the Closing
and relates to a period subsequent to the Closing.

         Prepaid Revenue shall mean any item which in accordance with GAAP would
be treated as revenue and which has been received by Seller prior to the Closing
and relates to a period subsequent to the Closing.

         Private Authorizations shall mean all approvals, concessions, consents,
franchises, licenses, permits, and other authorizations of all Persons (other
than Authorities) including without limitation those with respect to
Intellectual Property relating to the ownership or operation of the Seller
Assets or the conduct of the Seller Business.

         Pro Ratable Taxes shall mean real estate and other property Taxes, ad
valorem Taxes, gross receipts Taxes and similar Taxes, but shall not include
federal, state or local income Taxes, franchise Taxes or other Taxes measured by
or based upon income or gain on sale or other disposition of property or assets.

         Purchase Price shall have the meaning given to it in Section 2.3.

         Real Property shall mean all of the fee estates and buildings and other
fixtures and improvements thereon, leasehold interest, easements, licenses,
rights to access, right-of- way, and other real property interest which are
owned or used by Seller or any Seller Subsidiary as of the date hereof in the
conduct of the Seller Business, plus such additions thereto and deletions
therefrom arising in the ordinary course of business between the date hereof and
the Closing Date.

         Regulations shall mean the federal income tax regulations promulgated
under the Code, as such Regulations may be amended from time to time. All
references herein to specific sections of the Regulations shall be deemed also
to refer to any corresponding provisions of succeeding Regulations, and 

                                      A-9
<PAGE>

all references to temporary Regulations shall be deemed also to refer to any
corresponding provisions of final Regulations.

         Representatives shall have the meaning given to it in Section 5.1(a).

         Securities Act shall mean the Securities Act of 1933, and the rules and
regulations thereunder, all as from time to time in effect, or any successor
law, rules or regulations, and any reference to any statutory or regulatory
provision shall be deemed to be a reference to any successor statutory or
regulatory provision.

         Seller shall have the meaning given to it in the Preamble.

         Seller Accounts Receivable shall have the meaning given to it in
Section 2.4.

         Seller Assets shall have the meaning given to it in Section 2.1.

         Seller Assumable Agreements shall mean all obligations and liabilities
of Seller under all Leases, Material Agreements, Governmental Authorizations,
Private Authorizations and other Contractual Obligations not required to be
listed on Section 3.15 of the Seller Disclosure Schedule entered into in the
ordinary course of business and relating to the ownership or operation of any of
the Seller Assets or the conduct of the Seller Business.

         Seller Assumed Liabilities shall have the meaning given to it in
Section 2.2(b).

         Seller Business shall have the meaning given them in the first Whereas
paragraph.

         Seller Disclosure Schedule shall mean the Seller Disclosure Schedule
dated as of the date of this Agreement delivered by Seller to ATS.

         Seller Employees shall have the meaning given it in the Section 3.14.

         Seller Financial Statements shall have the meaning given to it in
Section 3.2(b).

         Seller Nonassumed Obligations shall have the meaning given to it in
Section 2.2(b).

         Seller Subsidiaries shall mean, collectively, Lenfest Atlantic, Inc., a
New Jersey corporation, MicroNet, Inc., a Delaware corporation, MicroNet
Diversified Investments, Inc., a Delaware corporation, MicroNet Delmarva, Inc.,
a Delaware corporation, MicroNet, L.P, a Delaware limited partnership, and
Lenfest New Castle County, a Delaware general partnership.

         Seller's Environmental Notice shall have the meaning given to it in
Section 5.8.

         Seller's knowledge means the actual knowledge of any Seller officer or
senior manager, as such knowledge exists on the date of this Agreement and no
later date, after reasonable review of appropriate Seller records.

         Seller's Title Notice shall have the meaning given to it in Section
5.7.

         Settlement Proposal shall have the meaning given to it in Section 8.5.

                                      A-10
<PAGE>

         Subsidiary shall mean, with respect to a Person, any Entity a majority
of the capital stock ordinarily entitled to vote for the election of directors
of which, or if no such voting stock is outstanding, a majority of the equity
interests of which, is owned directly or indirectly, legally or beneficially, by
such Person or any other Person Controlled by such Person.

         Tax (and "Taxable", which shall mean subject to Tax), shall mean, with
respect to any Person, (a) all taxes (domestic or foreign), including without
limitation any income (net, gross or other including recapture of any tax items
such as investment tax credits), alternative or add-on minimum tax, gross
income, gross receipts, gains, sales, use, leasing, lease, user, ad valorem,
transfer, recording, franchise, profits, property (real or personal, tangible or
intangible), fuel, license, withholding on amounts paid to or by such Person,
payroll, employment, unemployment, social security, excise, severance, stamp,
occupation, premium, environmental or windfall profit tax, custom, duty or other
tax, or other like assessment or charge of any kind whatsoever, together with
any interest, levies, assessments, charges, penalties, addition to tax or
additional amount imposed by any Taxing Authority, (b) any joint or several
liability of such Person with any other Person for the payment of any amounts of
the type described in (a), and (c) any liability of such Person for the payment
of any amounts of the type described in (a) as a result of any express or
implied obligation to indemnify any other Person.

         Tax Allocation Schedule shall have the meaning given to it in Section
2.3.

         Tax Claim shall mean any Claim which relates to Taxes, including
without limitation the representations and warranties set forth in Section 3.11.

         Tax Return or Returns shall mean all returns, consolidated or otherwise
(including without limitation information returns), required to be filed with
any Authority with respect to Taxes.

         Taxing Authority shall mean any Authority responsible for the
imposition of any Tax.

         Title Company shall have the meaning given to it in Section 5.7.

         Title Reports shall have the meaning given to it in Section 5.7.

         Termination Date shall have the meaning given to it in Section 7.1.

         Transactions shall mean the transactions contemplated to be consummated
on or prior to the Closing Date, including without limitation the purchase and
sale of the Seller Assets and the Seller Business and the execution, delivery
and performance of the Collateral Documents.

                                      A-11