UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                    FORM 10-K


(Mark  One)  

[X]  ANNUAL  REPORT  PURSUANT  TO  SECTION  13 OR 15(d) OF THE SECURITIES  
     EXCHANGE  ACT OF 1934  [FEE  REQUIRED]  

     For the  fiscal  year  ended December 31, 1997 

                                       OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
    EXCHANGE ACT OF 1934

                         Commission file number 0-16225
                                      EMCON
             (Exact name of Registrant as specified in its charter)

California                                                 94-1738964
(State or other jurisdiction of                          (I.R.S. Employer
incorporation of organization)                          Identification No.)

400 South El Camino Real
Suite 1200
San Mateo, California                                        94402
(Address, of principal executive offices)                 (Zip Code)

Registrant's telephone number, including area code (650) 375-1522

Securities registered pursuant to Section 12(b) of the Act:
                                                      Name of each exchange
         Title of each class                          on which registered
         -------------------                          ---------------------
             None                                            None

Securities registered pursuant to Section 12(g) of the Act:

                                  Common Stock
                                (Title of Class)

     Indicate  by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
Registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes X No ____

                                       1




Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

The  aggregate  market  value  of the  voting  stock of the  Registrant  held by
non-affiliates of the Registrant, based on the closing price of the Registrant's
Common  Stock as quoted  by the  National  Association  of  Securities  Dealers'
Automated  Quotation  System on February 28,  1998,  was  $24,794,995  Shares of
Common Stock held by each officer and director and by each person who owns 5% or
more of the outstanding Common Stock have been excluded in that such persons may
be  deemed to be  affiliates.  This  determination  of  affiliate  status is not
necessarily a conclusive determination for other purposes.

The number of shares of the Registrant's Common Stock outstanding as of February
28, 1998, was 8,574,839.

                       DOCUMENTS INCORPORATED BY REFERENCE

Parts of the  Registrant's  definitive  proxy  statement  to be  filed  with the
Commission within 120 days of the end of Registrant's fiscal year ended December
31, 1997 are incorporated by reference in Part III of this Form 10-K.

The Index to Exhibits appears on Page 44 of this Report. This Report,  including
all exhibits and attachments, contains 91 pages.


                                       2




                                TABLE OF CONTENTS

PART I                                                                   PAGE
  Item   1:    Business  ...............................................   4

  Item   2:    Properties...............................................   9

  Item   3:    Legal Proceedings........................................  10

  Item   4:    Submission of Matters to a Vote of Security Holders......  10

PART II
  Item   5:    Market for the Registrant's Common Equity and Related 
                 Stockholder Matters....................................  11

  Item   6:    Selected Financial Data..................................  12

  Item   7:    Management's Discussion and Analysis of Financial 
               Condition and Results of Operations......................  13

  Item   8:    Financial Statements and Supplementary Data..............  18

  Item   9:    Changes in and Disagreements with Accountants on 
               Accounting and Financial Disclosure......................  40

PART III
  Item 10:     Directors and Executive Officers of the Registrant.......  40

   Item 11:    Executive Compensation...................................  40

   Item 12:    Security Ownership of Certain Beneficial Owners and
                 Management.............................................  40

   Item 13:    Certain Relationships and Related Transactions...........  40 

PART IV
    Item 14:   Exhibits, Financial Statement Schedules, and Reports 
                 on Form 8-K............................................  41

               Signatures...............................................  42

                                       3



                                     PART I

Item 1.       Business

EMCON (referred to herein as "EMCON" and the "Company")  provides  comprehensive
environmental engineering, design, construction, operations and maintenance, and
equipment fabrication services to a variety of public and private industrial and
solid waste clients.  The Company is comprised of two divisions -- the Operation
and Construction  Division (EOC) and the Professional Services Division (PSD) --
and services three key service lines: Solid Waste, Site Restoration and Facility
Services.

EMCON is a leader  in the  design,  construction  and  remediation  of solid and
hazardous waste facilities,  having participated in the design, construction and
remediation of several hundred transfer,  storage and disposal facilities in the
United  States,  as well as  Argentina,  Canada,  Hong Kong,  India,  Indonesia,
Israel,  Kuwait,  Malaysia,  Russia,  Saudi Arabia,  Mexico, Peru and Venezuela.
EMCON's waste facility services include site selection and evaluation,  facility
design,  development  of  preprocessing  and  operating  plants,  assistance  in
regulatory  compliance  and  permitting,  final  closure,  end-use  planning and
design,  construction,  and operations and maintenance.  The Company's  services
also include the development of programs dealing with environmental  assessments
and  remediation of contaminated  sites, as well as services  related to applied
sciences such as fuel spill damage assessment,  marine  fate-and-effect  studies
and  natural  resource  damage  assessment.  The  Company's  professional  staff
includes chemical, civil, geotechnical, mechanical, electrical and environmental
engineers; marine and terrestrial biologists;  oceanographers; plant ecologists;
chemists;   geologists;   hydrogeologists;   hydrologists   and   toxicologists.
References  to the  Company  and  EMCON in this  report  include  the  Company's
subsidiaries, unless the context indicates otherwise.

During  the  first  quarter  of  1997,  the  Company  completed  the sale of its
laboratory  subsidiary,  Columbia  Analytical  Services,  Inc.  ("CAS"),  to the
employees of CAS for $4,000,000 in cash,  CAS'  promissory  notes for $3,219,000
(the "CAS Notes") and a  continuing  preferred  stock  interest in CAS valued at
$500,000.  The  Company  paid to CAS  $206,000  in  cash  for  retired  employee
contracts  and for  accelerated  vesting of stock  options  and other non vested
stock rights. The principal balance of the CAS Notes are potentially  subject to
adjustment  based upon the Company's  ability to continue to provide  analytical
laboratory work to CAS.

Effective May 1, 1997,  Organic Waste  Technology,  Inc.  (OWT),  a wholly-owned
subsidiary of EMCON, acquired all of the outstanding equity interest in National
Earth  Products,  Inc.  (NEP),  a  Lancaster,  Pennsylvania-based  company  with
significant   expertise  in  landfill  civil   construction  and  related  soils
processing.  NEP was  acquired  for $933,000 in cash and the issuance of EMCON's
convertible  promissory  notes in the  aggregate  principal  amount of $800,000.
Approximately  50% of the  convertible  notes are due on May 1,  2000,  with the
balance due on May 1, 2002.  The  indebtedness  bears interest at the rate of 8%
per annum and is  convertible  into EMCON Common Stock at a conversion  price of
$6.50 per share.  The transaction was accounted for as a purchase.  Specifically
identifiable   intangible  assets  and  goodwill  of  approximately   $1,476,000
resulting from this acquisition are included in goodwill and are being amortized
over twenty-five years using the straight line method.  Accumulated amortization
as of December 31, 1997 was approximately $39,000.  Additional consideration may
be paid for the purchase of NEP subject to the  achievement  of certain earn out
goals over the next three years.  This acquisition would not have had a material
effect on net revenue, net income, or income per share, had it been effective at
January 1, 1997.

                                       4


On March  6,  1997,  the  Company  completed  the  sale of its  Marina  landfill
gas-to-energy  project for a net up front cash payment of $944,000.  The Company
earned an  additional  $200,000 at year end as a result of the  satisfaction  of
certain post-closing contingencies.

                                    Services

The Company is comprised of two operating divisions:  the Professional  Services
Division (PSD);  and the Operations and Construction  Division (EOC).  These two
divisions work in concert to address the needs of the Company's clients in three
key service lines:  Solid Waste, Site Restoration and Facility  Services.  Solid
Waste Services

The Company's  Professional  Services  Division and Operations and  Construction
Division  offer a full range of services  to  operators  of solid and  hazardous
waste transfer,  storage,  recycling, and disposal facilities;  from the design,
permitting and  construction  of the facility,  to the  fabrication of necessary
equipment and components,  to post-closure,  operations and maintenance services
and end-use  planning.  Customers may utilize the full range or a portion of the
Company's services.

Through its extensive  experience in the solid waste  industry,  the Company has
developed  expertise in several  critical areas of waste  disposal  technology -
landfill cells and related  infrastructure,  liner systems,  leachate treatment,
and gas control/recovery systems. To protect surrounding soil and water, natural
and  synthetic  liners are used to collect  and  contain  potentially  hazardous
liquids  percolating  through  the waste  that have been  deposited  at the site
("leachate").  Leachate is then collected on the surface of the liner, withdrawn
from the landfill  and treated  using  physical,  chemical,  evaporative  and/or
biological methods. Gas control and recovery systems,  which may be installed on
active or closed  landfills,  are used to control the  methane  gas  produced by
decomposing organic refuse.  Where economical,  recovery systems are designed to
extract  methane  to  generate  heat  and/or  electricity,  or in some  cases to
evaporate leachate using the Company's patented leachate evaporation technology.
Federal  regulation now requires that all new land disposal  facilities  utilize
liners and methane control  systems,  and that these systems be required to meet
increasingly stringent design standards.

EMCON's  services to its solid waste clients often begin with the  evaluation of
potential disposal facility sites. The hydrogeological and geotechnical staff of
the Professional  Services Division evaluate soils,  groundwater  occurrence and
quality,  seismic stability and potential flooding at possible locations,  while
other professionals analyze operational  considerations,  such as proximity of a
site  to  water  sources,  visibility  to the  public  and  estimated  operating
expenses. Once desirable sites are identified,  the Company assists in obtaining
regulatory  approvals  by  drafting  environmental  impact  reports  and  permit
applications, appearing at hearings and negotiating with government agencies.

EMCON performs detailed cost/benefit analyses of design alternatives,  using, if
possible,  natural  features of the site to reduce cost.  EMCON engineers design
the waste disposal facility, considering such factors as the volume and types of
material  to be  disposed  at the site,  land use and  public  policy,  physical
characteristics  of the site and regulatory  requirements.  EMCON identifies the
type of natural or synthetic  liners which are  appropriate  or required for the
site and designs  the  monitoring  systems,  landfill  gas  control  systems and
leachate  recovery and  treatment  systems.  EMCON also  monitors  statutory and
regulatory  developments,  and assists operators in implementing required design
or  operating  changes  and  preparing   additional   permit   applications  and
environmental reports.
                                       5


Throughout the construction process, the Professional Services Division performs
services  such  as  preparing  detailed  construction  documents,  assisting  in
contractor  selection,  scheduling and monitoring  work in progress,  performing
construction quality assurance review, review of contractor requests for payment
and assisting with regulatory compliance and permitting. The Company also trains
disposal facility personnel,  performs  environmental  monitoring services,  and
designs site maintenance programs and operating plans.

Where appropriate,  the Operations and Construction Division can perform a broad
range of related services,  including  construction of landfill cells,  landfill
remediation and collection systems, landfill gas flares and control systems, and
leachate  evaporation systems, as well as the capping,  closure,  development of
landfill gas recovery projects,  and long-term  operation and maintenance of old
landfills.  The  Company is also  seeing  more  opportunities  to provide  fully
integrated  design  --  build  projects,  utilizing  the  combined  solid  waste
expertise of PSD and EOC.

The Operations and  Construction  Division is complimented  by ET  Environmental
Corporation  ("ET"),  a  50/50  joint  venture  between  EMCON  and  The  Turner
Construction   Company   ("Turner").   ET's  charter  is  to  provide  primarily
above-ground  environmental,  remedial and  construction  services on a national
basis,  utilizing the regional  resources of EMCON and Turner. ET is a leader in
the development and construction of solid waste transfer  stations and materials
recovery facilities on a design build basis.

                            Site Restoration Services

EMCON's  environmental  expertise  incorporates  analytical and  risk-assessment
capabilities enabling remediation  specialists to design site-specific solutions
to environmental  compliance and  contamination  problems.  The Company is often
called upon to design and monitor  remediation  plans when corrective  action is
required  at solid or  hazardous  waste  storage or disposal  facilities  and at
commercial or industrial  plant sites.  Problems  which may require  remediation
include  leaching of  hazardous  chemicals  or wastes into  groundwater,  ground
instability  or erosion,  flooding and migration of landfill gas. Work generally
entails  site  reconnaissance,   drilling  exploratory  borings,  and  soil  and
groundwater sampling as part of the assessment program.  Using data collected in
the  assessment  phase of a project,  the  Company  then  defines the nature and
extent  of  the  problem,  develops  a  remediation  program  and  monitors  its
implementation.

The Company  generally  approaches site restoration  projects by consulting with
the client on the nature and scope of the problem.  Historical information about
the site,  if available,  is reviewed to determine  the most likely  sources and
locations of contamination. Information about the local geology and hydrogeology
is also reviewed to determine potential migration pathways. A detailed work plan
is then prepared that describes the field investigation program to be conducted,
including  the number and location of samples to be  collected  and the specific
chemical  analyses to be  performed.  Trained  personnel  then conduct the field
investigation  program,  which may include  drilling  soil  borings,  installing
groundwater  monitoring  wells,  and  collecting  samples of soil,  groundwater,
surface water and/or industrial discharges.

Following laboratory analysis of the various samples collected,  the results are
evaluated by Company engineers and scientists to determine the nature and extent
of contamination at the site.  Depending on the complexity of the site, this may
require more than one round of sampling. Site cleanup levels are then determined
based on the media that have been impacted,  the  contaminants  of concern,  the
intended use of the property, and state and federal regulations. In consultation
with the  client,  various  remediation  alternatives  are then  identified  and

                                       6



evaluated for  implementability,  effectiveness,  permanence and cost.  Remedial
alternatives  at a site may include the excavation and removal of the sources of
contamination  and  contaminated  soil, the removal and treatment of groundwater
using physical and chemical  treatment  systems,  or the installation of surface
caps and vertical hydraulic barriers.  EMCON also applies in-situ  technologies,
such  as  vapor  extraction  or  bioremediation  as  appropriate,  to  remediate
contaminated  soils  and  groundwater  as a means to  reduce  cost and  minimize
disturbance. To assure continued compliance during and after remediation,  EMCON
designs  and  provides   operations  and   maintenance   programs  for  affected
facilities.

Through its ET joint venture with Turner,  the Company is also able to provide a
complete turnkey package to clients,  combining  planning and  implementation of
facility/plant   decommissioning;    remediation   of   soil   and   groundwater
contamination, and lead based paint and asbestos abatement.

                                Facility Services

In the last several years the market has seen a significant  trend among many of
the  larger  industrial  clients  to  outsourcing  many of their  environmental,
regulatory,  and  health  and  safety  compliance  requirements.   EMCON  offers
responsive  assistance  to the  regulated  community  in a broad  range of areas
including air quality  regulatory  compliance  through  provision of air quality
assessment and engineering services. Company personnel have direct experience in
air  quality  permitting  under  the New  Source  Review  (NSR),  Prevention  of
Significant  Deterioration  (PSD) and added requirements under the Clean Air Act
Amendments of 1990,  preparing emission  inventories (for criteria and toxic air
pollutants),   performing  risk  assessment  to  evaluate  potential  human  and
ecological risk, evaluating emission control technologies (BACT/RACT/LAER/MACT),
dispersion  modeling,  ambient  air  quality  and  meteorological  measurements,
pollution prevention and waste minimization,  indoor air, litigation support and
expert  testimony,  and compliance  audits.  EMCON's air quality staff are fully
integrated  with  staff in  other  environmental  disciplines  to  provide  cost
effective  evaluations  and  compliance  solutions to  situations  which involve
multiple media contamination.

                              Clients and Marketing

EMCON's  principal clients are industrial  concerns,  predominantly in the solid
waste,  petroleum,  wood products,  aerospace,  power generation,  chemicals and
manufacturing  industries.  The Company  also  provides  services to  utilities,
non-regulatory  government  entities,  and financial  institutions.  The Company
often enters into master service agreements with major clients,  which set forth
the general  terms and  conditions  under which EMCON will perform  services and
which facilitate repeated use of the Company's services.

EMCON focuses significant efforts on providing high quality services in a timely
manner and developing long-term relationships with its clients. EMCON assigns an
experienced project manager to each project to coordinate work undertaken by the
numerous  professionals  from  different  disciplines  within the Company.  This
approach  reduces the time and cost  required to complete a project and relieves
the client of the  responsibility  of  coordinating  the efforts of  independent
consultants.  Because  the  Company  provides a broad  range of  services,  work
performed  for a  client  in one  technical  area  often  leads to work in other
technical areas.

In the last  several  years,  an  increasing  amount  of work has been done on a
competitive  bid basis in response to client  requests for  proposals.  This has
required the dedication of significantly  greater  resources to proposal writing
and  general  business  development,  and the  implementation  of a more  formal
marketing program to share leads and coordinate resources nationwide.

                                       7



To further  promote its  services,  the Company takes an active role in industry
trade associations to enhance its national  reputation for technical  expertise.
Similarly, EMCON provides services to a wide variety of local, state and federal
government  agencies and  contractors.  Participation  in such contracts  allows
EMCON to remain on the leading  edge of new  technological  developments  and to
publicize its expertise.
                                   Regulation

Public  concern over health,  safety and  preservation  of the  environment  has
resulted in the enactment of a broad range of environmental laws and regulations
by  local,  state  and  federal  lawmakers  and  agencies.  These  laws  and the
implementing  regulations affect nearly every industry,  as well as the agencies
of  federal,  state  and  local  governments  charged  with  their  enforcement.
Recently,   the  level  of  enforcement  has  waned  given  governmental  budget
constraints and a number of environmental laws set for renewal have been allowed
to lapse.  Nonetheless,  those laws and regulations still in force will continue
to  stimulate  demand  for the kinds of  services  offered  by EMCON.  They also
subject the Company to stringent regulation in the conduct of its operations.

                        Potential Liability and Insurance

The Company's work involves assisting clients in handling, storing and disposing
of  hazardous  materials,  toxic  wastes  and other  pollutants,  as well as the
remediation  of existing  contamination.  The Company  therefore is exposed to a
significant risk of professional liability for environmental damage and personal
injury.

EMCON maintains health and safety and quality assurance/quality control programs
to  reduce  the  risk of  potential  damage  to  persons  and  property  and the
associated   potential  liability.   In  addition,   EMCON  currently  maintains
professional  liability  insurance  (covering  damages  resulting from negligent
acts,  errors,  mistakes  or  omissions  in  rendering  or failing to render its
professional  services)  as  well  as  commercial  general  liability  insurance
(covering bodily injury and property damage).

EMCON endeavors contractually to limit its potential liability to the amount and
terms of its  insurance  policies,  and to be  indemnified  by its clients  from
potential liability to third parties. However, the Company is not always able to
obtain such  limitations on liability or  indemnification,  and such provisions,
when  obtained,   may  not  adequately   shelter  the  Company  from  liability.
Consequently,  a partially or completely  uninsured  claim, if successful and of
sufficient  magnitude,  could have a material  adverse effect on the Company and
its financial condition and results of operations.

Although the  liabilities  arising out of  environmental  laws are more directly
applicable  to the Company's  clients,  such laws could,  under certain  factual
circumstances,  apply to some of the  activities  pursued by the  Company in the
course of business,  including failure to properly design a cleanup,  removal or
remedial  action  plan or failure  to  achieve  required  cleanup  standards  in
compliance  with  such laws and  standards.  Such  liabilities  can be joint and
several where other parties are involved. Because much of the Company's business
is  generated  either  directly or  indirectly  as a result of federal and state
governmental   programs  and  regulations,   changes  in  governmental  policies
affecting such programs, or regulations or administrative  actions affecting the
funding or sponsorship of such programs, could have a material adverse effect on
the Company's business. See Item 3 - Legal Proceedings.

                                       8

                                   Competition

EMCON competes  directly with a wide variety of national and local  engineering,
consulting,  construction,  equipment,  and operations and maintenance companies
which offer services similar to those provided by the Company.  However, many of
these  competitors  are only  engaged  in  certain  segments  of the  applicable
industry and do not provide the broad range of services provided by the Company.
In addition,  the Company competes  indirectly with remediation  companies which
offer   environmental   consulting  and   engineering   services,   as  well  as
transportation,  storage or  disposal  capabilities  generally  not  provided by
EMCON.  The  Company  believes  that the  principal  competitive  factors in its
industry are price, reputation, technical proficiency, management experience and
breadth of services  offered.  The industry has also  experienced  a significant
amount of consolidation activity.  Management anticipates that these trends will
continue for the foreseeable future.

                                    Employees

As of December 31, 1997,  the Company had a total of 972  employees,  including:
520 professionals;  144 technical personnel;  and 308 administrative and support
personnel.   The  Company's   professional  staff  includes   chemical,   civil,
geotechnical,  mechanical,  electrical and environmental  engineers;  marine and
terrestrial biologists;  oceanographers; plant ecologists; chemists; geologists;
hydrogeologists;  hydrologists  and  toxicologists.  The  Company's  ability  to
attract and retain qualified engineers, scientists and other professionals is an
important factor in determining its future success. EMCON's employees have never
been  represented  by a union,  and the Company  believes its relations with its
employees are good.

                                   Seasonality

EMCON's business has experienced an increase in seasonality in recent years, due
in part to the increase in on-site  investigation,  construction and other field
work.  Consequently,  the  financial  results in its  second and third  quarters
(ending June 30 and  September 30,  respectively)  tend to be stronger than such
results in its first and fourth quarters.

                                     Backlog

The Company  estimates  that at  December  31,  1997,  the backlog of future net
revenue from contracts in existence and orders believed to be firm was in excess
of $75 million,  all of which is expected to be received  within the next twelve
months,  compared to $80 million  backlog  (including CAS) at December 31, 1996.
However,  there can be no  assurance  that this  work will not be  postponed  or
canceled.  Furthermore, a substantial portion of the Company's work is performed
pursuant to agreements by which the Company is compensated for time and expenses
devoted to projects with indefinite lives.

Item 2.       Properties

The  Company's  corporate  office,  located in San Mateo,  California,  occupies
approximately  3,000 square feet and is leased through July, 2001. The Company's
accounting center,  located in Sacramento,  California,  occupies  approximately
4,000 square feet and is leased through December 31, 2000.

                                       9



The  Company  owns 4.4 acres of real  property in Kelso,  Washington,  including
37,000  square  feet of office and  analytical  lab space.  The  facilities  are
currently  leased to CAS under a long term lease  expiring  April 3,  2007.  The
Company owns a 4.9 acre piece of property in New Concord, Ohio, including 25,000
square feet of office and equipment fabrication facilities.

The  Company  leases  office  and  warehouse  space in a total of 50  facilities
located in Alaska, Arizona, California, Connecticut, Florida, Georgia, Illinois,
Maine,   Massachusetts,   Michigan,   New  Jersey,   New  York,  Ohio,   Oregon,
Pennsylvania,  Puerto Rico, Texas, Vermont, Virginia and Washington under leases
expiring  at various  times  through  December  2002.  These  facilities  have a
combined area of approximately 337,000 square feet.

Item 3.       Legal Proceedings

As a firm  engaged in  environmental-related  matters,  the  Company  encounters
potential liability,  including claims for significant  environmental damage, in
the normal course of business.  The Company is party to lawsuits and is aware of
potential  exposure related to certain claims.  In the opinion of management the
resolution  of all known  lawsuits/claims  at amounts  in excess of  established
reserves  will not have a material  adverse  affect on the  Company's  financial
position, results of operations or cash flows.

Item 4.       Submission of Matters to a Vote of Security Holders

There were no matters  submitted  to a vote of the security  holders  during the
fourth quarter of the fiscal year ended December 31, 1997.

                                       10



                                     PART II

Item 5.       Market for the Registrant's Common Equity and Related Stockholder 
              Matters

The Company's  common stock is traded on the NASDAQ National Market System under
the symbol MCON. The following  table sets forth the quarterly range of high and
low bid quotations per quarter for 1997 and 1996:

- -------------------------------------------------------------------------------
                                                High              Low
- -------------------------------------------------------------------------------
January 1 - March 31, 1996                     $4.88             $4.00
April 1 - June 30, 1996                         5.13              4.13
July 1 - September 30, 1996                     4.13              3.19
October 1 - December 31, 1996                   4.25              3.50

January 1 - March 31, 1997                      3.75              3.00
April 1 - June 30, 1997                         4.06              2.88
July 1 - September 30, 1997                     5.50              3.13
October 1 - December 31, 1997                   6.88              4.63
- -------------------------------------------------------------------------------

On February 28, 1998,  there were 509  shareholders  of record of the  Company's
common stock.

Although the Company does make annual distributions to a minority shareholder of
one of OWT's  subsidiaries,  the  Company  did not pay cash  dividends  to EMCON
shareholders  in 1997 or 1996 and does  not  plan to pay cash  dividends  to its
shareholders in the near future.  Furthermore,  the payment of cash dividends is
restricted  by the  Company's  bank  line of  credit  arrangement.  The  Company
presently intends to retain earnings for further development of its business.

                                       11




Item 6.       Selected Financial Data

Five Year Financial Highlights



- -----------------------------------------------------------------------------------------------------------------
                                                                       Years Ended December 31,
                                                -----------------------------------------------------------------
(In thousands, except per share amounts)            1997         1996         1995         1994         1993
- -----------------------------------------------------------------------------------------------------------------
                                                                                          
Operations Statement Data (a)
Gross revenue                                     $139,343     $137,626     $122,542     $115,638    $ 98,612
Net revenue                                        109,502      117,705      103,409       95,926      83,062
Direct expenses                                     56,134       52,608       39,473       37,307      32,201
Indirect expenses                                   49,782       65,844       61,498       59,302      47,528
Restructuring/other charges                         (1,612)       8,197         (17)        1,958          --
Loss on disposition of laboratory                      333        3,327           --           --          --
Income (loss) from operations                        4,865      (12,271)       2,455       (2,641)      3,333
Interest income                                        516          317          369          348         313
Interest expense                                     1,251        1,112          181           66          57
Equity in income/(loss) of affiliates                   (2)         227          (74)         (58)         --
Minority interest expense                              810          188           --           --          --
Income (loss) before provision (benefit) for
   income taxes                                      3,318      (13,027)       2,569       (2,417)      3,589
Provision (benefit) for income taxes                 1,161       (2,936)         783         (500)      1,165
Net income (loss)                                    2,157      (10,091)       1,786       (1,917)      2,424
- -----------------------------------------------------------------------------------------------------------------
Per Share Data (a)
Basic earnings (loss) per share                   $   0.25      $ (1.19)    $   0.22      $ (0.24)    $  0.33
Diluted earnings (loss) per share                 $   0.25           --     $   0.21           --     $  0.33
Shares used in computing basic earnings (loss)
   per share                                         8,549        8,485        8,274        7,919       7,296
Shares used in computing diluted earnings
   (loss) per share                                  8,693          --         8,338          --        7,455
- -----------------------------------------------------------------------------------------------------------------
Balance Sheet Data (a)
Total assets                                       $93,075     $ 90,912     $ 78,636     $ 80,989    $ 68,852
Working capital                                     32,583       34,601       36,313       32,582      36,200
Noncurrent obligations and deferred income
   taxes                                            14,177       16,799        1,700        1,348         882
Shareholders' equity                                58,100       55,812       65,306       63,059      58,997
- -----------------------------------------------------------------------------------------------------------------


(a)      The  Company  was  involved  in  several  acquisitions,   mergers,  and
         divestitures  during the five year period presented.  See Notes 4 and 6
         to the Company's consolidated financial statements.

                                       12


Item 7.       Management's Discussion and Analysis of Financial Condition
              and Results of Operations

Results of Operations

The following  table sets forth (i) certain items in the Company's  Consolidated
Statements of Operations as a percentage of net revenue and (ii) the  percentage
increase  (decrease)  in the  dollar  amount  of  those  items  for  the  period
indicated.  Net  revenue  is  determined  by  subtracting  the costs of  outside
subcontractor services,  largely drilling contractors and specialized consultant
services,  from gross revenue. Since EMCON's use of subcontractors can vary from
period to period  and the costs of these  services  are passed  directly  to the
Company's  clients,  the Company  believes  that net revenue is a more  accurate
measure of the value of its services.



- --------------------------------------------------------------------------------------------------------------------
                                                          Percentage of                          Percentage
                                                           Net Revenue                       Increase (Decrease)
                                               ---------------------------------         ---------------------------
                                                                                              1997          1996
                                                                                              vs.           vs.
Years Ended December 31,                          1997        1996         1995               1996          1995
- --------------------------------------------------------------------------------------------------------------------
                                                                                                 
Net revenue                                       100.0%      100.0%       100.0%             (7.0%)         13.8%
Direct expenses                                    51.3%       44.7%        38.2%              6.7%          33.3%
Indirect expenses                                  45.5%       55.9%        59.4%            (24.4%)          7.1%
Restructuring/other charges                        (0.5%)       7.0%          --            (107.1%)            --
Loss on disposition of laboratory                   0.3%        2.8%          --             (90.0%)            --
Gain on disposition of assets                      (1.0%)        --           --                --              --
Income (loss) from operations                       4.4%      (10.4%)        2.4%            139.6%        (599.8%)
Interest income (expense), net                     (0.7%)      (0.7%)        0.2%              7.5%        (522.9%)
Equity in income/(loss) of affiliates               --          0.2%        (0.1%)          (100.9%)            --
Minority interest expense                          (0.7%)      (0.2%)         --            (330.9%)            --
Income (loss) before provision (benefit) for
   income taxes                                     3.0%      (11.1%)        2.5%            125.5%        (607.1%)
Provision (benefit) for income
  taxes                                             1.0%       (2.5%)        0.8%            139.5%         475.0%
Net income (loss)                                   2.0%       (8.6%)        1.7%            121.4%        (665.0%)
- --------------------------------------------------------------------------------------------------------------------

Net Revenue:

Net revenue for 1997 totaled $109,502,000,  a 7.0% decrease from $117,705,000 in
1996.  The  decrease  was  due in  part  to  the  divestiture  of the  Company's
laboratory subsidiary,  Columbia Analytical Services,  Inc. (CAS), at the end of
the first quarter of 1997 (CAS contributed net revenue of $4,904,000 in 1997 and
$20,505,000 in 1996), as well as lower demand for the Company's  services within
the Company's  Professional Services Division (PSD). The decrease in net revenue
was offset in part by the growth of the Company's  Operations  and  Construction
(EOC)  Division  from  net  revenue  of  $22,167,000  in  1996   (following  the
acquisition of OWT on February 29, 1996) to $41,386,000 in 1997.

Net revenue for 1996  increased  by 13.8% over net  revenue of  $103,409,000  in
1995.  Excluding  net  revenue  of  $20,596,000  contributed  by  Organic  Waste
Technologies,  Inc.  (OWT),  following its acquisition on February 29, 1996, net

                                       13



revenue in 1996 totaled $97,109,000, a 6.1% decrease from 1995. The decrease was
primarily   attributable  to  significant   underperformance  of  the  Company's
Professional  Services  Division  combined  with a general  decrease  in revenue
following reductions in work force throughout the Professional Services Division
during the year.  The decrease was, to a lesser  extent,  also  attributable  to
particularly  difficult weather  conditions in the Northeast and Northwest areas
during the first quarter of 1996.

Direct Expenses:

Direct expenses include all project related expenses, including compensation for
billable hours for technical and  professional  staff and other project  related
expenses,  as well as direct  labor  and  materials  for  in-house  testing  and
construction  activities.  Direct expenses for 1997 totaled $56,134,000,  a 6.7%
increase compared to direct expenses of $52,608,000 for 1996. Direct expenses as
a percent of net  revenue  increased  to 51.3% in 1997 from  44.7% in 1996.  The
increase  was due in large part to a shift in business  mix  resulting  from the
divestiture  of CAS and the continued  expansion of the EOC  Division,  combined
with higher utilization of professional  staff within the Professional  Services
Division.

Direct  expenses  in  1996  increased  33.3%  over  direct  expenses  in 1995 of
$39,473,000.   Excluding  the  direct  expenses  incurred  by  OWT  in  1996  of
$14,744,000,  direct expenses in 1996 totaled $37,864,000,  a 4.1% decrease from
1995. Excluding the effects of OWT, direct expenses, as a percent of net revenue
in  1996,  increased  to 39.0%  from  38.2% in 1995;  due  largely  to  relative
increases in the cost of labor and materials within the laboratory division.

Indirect Expenses:

Indirect expenses include  compensation for non-billable  hours of professional,
technical and administrative staff, and general administrative  expenses such as
rent, bonuses,  benefits,  insurance,  marketing,  legal fees,  depreciation and
amortization.  Indirect expenses for 1997 totaled $49,782,000,  a 24.4% decrease
compared to indirect  expenses of $65,844,000 for 1996.  Indirect  expenses as a
percent  of net  revenue  decreased  to 45.5% in 1997 from  55.9% for 1996.  The
decrease was due in part to the above-noted  shift in business mix following the
divestiture of CAS, the expansion of the EOC Division and the planned short-term
contraction of the Professional  Services  Division,  combined with the positive
impact of cost containment and restructuring measures put in place at the end of
1996.

Indirect  expenses  in 1996  increased  7.1%  over  1995  indirect  expenses  of
$61,498,000. Excluding indirect expenses of $3,173,000 incurred by OWT, indirect
expenses in 1996 totaled  $62,671,000,  a 1.9% increase over 1995. Excluding the
impact of OWT,  indirect  expenses as a percent of net revenue in 1996 increased
to 64.5%  from 59.4% in 1995;  due in part to the  above-noted  decrease  in net
revenue,  combined with the effect of significant  severance  costs and expenses
related to the closing of several small offices during 1996. In addition, during
the fourth quarter of 1996, the Company  increased  reserves relating to pending
litigation matters by an additional $1,553,000.

Restructuring/Other Charges:

In the  fourth  quarter  of  1996,  senior  management  reviewed  the  Company's
operational and  administrative  functions for the purpose of further  improving
the Company's  competitiveness and overall profitability.  Based on this review,

                                       14



the  Company's  Board of Directors  approved a strategic  restructuring  plan in
December,  1996 to reposition the Company to fully exploit its core strengths in
engineering,  design,  construction,  operations and maintenance. As a result of
these actions in 1996, the Company  recognized  pre-tax  restructuring and other
charges  of   $1,237,000   and   $6,960,000,   respectively.   Included  in  the
restructuring  charge were  $604,000  relating to the closure or  downsizing  of
several underperforming offices,  $628,000 related to employee severance and the
write-off  of  employment  contracts  for former  employees  no longer  actively
participating  in the  Company's  affairs,  and a $5,000  adjustment to the 1994
restructuring  plan.  Included in other charges were  $4,768,000  related to the
write-down  in the  carrying  value of goodwill  associated  with the  Company's
continuing  operating  units in  accordance  with  the  Statement  of  Financial
Accounting  Standards  No. 121,  "Accounting  for the  Impairment  of Long-Lived
Assets and for Long-Lived Assets to Be Disposed Of",  $1,529,000  related to the
write-off of idle or disposed of assets,  $368,000  related to the write-down of
the Company's  landfill gas  production  rights and related  fixed  assets,  and
$156,000 related to the buyout and cancellation of outstanding  stock options to
purchase  approximately  743,000  shares of the  Company's  common stock held by
employees  of the Company.  Also,  included in other  charges were  $139,000 for
various other operational costs.

As of December 31, 1997,  $328,000 of the 1996  restructuring  charges have been
incurred and $318,000 remains in other accrued  liabilities.  A net reduction of
$586,000 to the reserve was  recorded to reflect  lower than  anticipated  costs
associated with the abandonment and subsequent  sublease of certain office space
and lower than anticipated  severance costs due to retaining certain  previously
identified personnel.

In October,  1994,  as a result of changes in senior  management,  the Company's
Board of Directors  approved a corporate  restructuring  plan that  included the
write-off  of  employment  contracts  with  no  future  value,   termination  of
personnel,  and the  elimination or  abandonment of excess and under  performing
assets and facilities. During the twelve months ended December 31, 1997, $27,000
of cash  charges  related to the 1994  restructuring  were  incurred and charged
against the established reserve, bringing the 1994 reserve to a zero balance. To
date,  $1,169,000 of  restructuring  costs have been incurred with no additional
cost anticipated.

Loss on Disposition of Laboratory:

In December 1996, the Company executed a letter of intent to sell its laboratory
division,  Columbia Analytical Services,  Inc. (CAS), to the employees of CAS by
the first quarter of 1997. In anticipation  of the sale, the Company  recognized
an impairment in its investment in CAS of $3,327,000;  including a write-down in
the carrying value of goodwill associated with previous laboratory  acquisitions
of $1,426,000. For the year ended December 31, 1996, CAS had a loss before taxes
of $142,000.

During the first quarter of 1997,  the Company  completed the sale of CAS to the
employees of CAS for $4,000,000 in cash,  CAS'  promissory  notes for $3,219,000
("CAS  Notes")  and a  continuing  preferred  stock  interest  in CAS  valued at
$500,000.  The  Company  paid  $206,000  in  cash to CAS  for  retired  employee
contracts  and for  accelerated  vesting of stock  options and other  non-vested
stock rights. As a result of several closing adjustments, the Company recognized
an  additional  loss  on  disposition  of CAS in the  first  quarter  of 1997 of
$333,000.  CAS and the Company  also  entered  into a Master  Service  Agreement
relating to the continued  provision of laboratory  services to the Company (the
"MSA").  The CAS Notes are subject to offset,  in certain  circumstances,  based
upon the levels of future  revenues to CAS  accruing  under the MSA. The Company
currently  does not  anticipate  that any  material  offset will occur under the
terms of the MSA.

                                       15


Gain on Sale of Assets:

During the first quarter of 1997,  the Company  completed the sale of one of its
landfill  gas-to-energy  projects,  including the related  leasehold  production
rights and associated machinery and equipment.  The Company recognized a gain on
disposition of the project of $1,026,000.

Interest Income:

The Company recorded interest income of $516,000 in 1997 compared to $317,000 in
1996 and $369,000 in 1995.  The increase in interest  income in 1997 compared to
1996 and 1995 was primarily due to the recognition of interest income on the CAS
Notes.

Interest Expense:

The  Company  incurred  interest  expense  of  $1,251,000  in 1997  compared  to
$1,112,000 in 1996.  The increase in interest  expense was a due primarily to an
increase in debt by OWT in connection with (i) the acquisition of National Earth
Products,  Inc.  and  (ii)  the  acquisition  and  expansion  of  its  equipment
fabrication  facility.  This was offset by the $3,000,000  prepayment on the OWT
secured term loan.

The increase in interest expense in 1996, compared to 1995, was due primarily to
increases in long-term  debt of  $11,747,000  incurred for purposes of financing
the  acquisition  of OWT in  February  of 1996 and  $5,000,000  for  purposes of
financing the subsequent expansion of OWT's 5.3 megawatt landfill  gas-to-energy
project.

Income Taxes Provision (Benefit):

The  provision  (benefit)  for income taxes in 1997 was  $1,161,000  compared to
($2,936,000)  in 1996 and $783,000 in 1995.  The effective tax rate for 1997 was
35.0%  versus  (22.5%)  in 1996 and  30.5%  for 1995.  The 1996 tax  benefit  is
primarily  due to  the  alternative  minimum  tax  credits  generated  from  the
Company's landfill  gas-to-energy  project and from temporary timing differences
consisting of the restructuring charges,  impairment of assets held for sale and
the increase in the legal reserve.

Included in the Company's  consolidated  balance sheet at December 31, 1997, are
total  current and  long-term  net deferred tax assets of  $5,263,000.  The full
utilization of such assets is dependent  upon a number of factors  including the
Company's ability to generate future profits,  the successful  implementation of
the Company's  restructuring plan and the anticipated  reduction in the level of
new tax credits  generated from the Company's  existing  landfill  gas-to-energy
project.  Based on these  factors,  the Company  believes that it is more likely
than not that the full  benefit of the net  deferred tax assets will be realized
by the Company in due course.

Liquidity and Capital Resources

Working Capital:

Cash  provided  by  operating  activities  for  fiscal  1997,  1996 and 1995 was
$6,189,000,  $1,583,000  and  $5,232,000,  respectively.  The  changes  in  cash
provided  by  operating  activities  in  1997,  1996  and  1995  were  primarily
attributed to changes in the Company's net income (loss),  accounts  receivable,

                                       16



accounts  payable,  depreciation  and  amortization,  bad debt expense,  gain on
disposition  of assets,  prepaid  expense and other current tax assets and other
accrued  liabilities.  During 1997, the Company's uses of cash for non-operating
activities primarily consisted of repayment of debt in the amount of $5,731,000,
and additions to property and equipment in the amount of  $5,325,000;  comprised
of computers,  field  equipment  and the expansion of its equipment  fabrication
facilities.  This  was  partially  offset  by net  cash  provided  by  operating
activities during 1997 of $6,189,000 and from net cash due to the disposition of
CAS. Cash and cash  equivalents  increased to $6,106,000 in 1997 from $5,331,000
in 1996.

In  conjunction  with  the  acquisition  of  OWT,  the  Company  entered  into a
$20,000,000   secured  credit  agreement  with  its  existing  commercial  bank,
replacing  its  previous  $10,000,000  unsecured  line of credit.  Under the new
agreement,  the  Company  borrowed  $10,000,000  on a term  loan  basis  with an
interest  at a managed  rate not to exceed the prime  rate.  Principal  is to be
amortized  over seven years,  but with any unpaid amount finally due and payable
on June 30,  2001.  The  remaining  $10,000,000  under the Credit  Agreement  is
available  for  working  capital  purposes  (with up to  $5,000,000  also  being
available for non-working capital purposes). The line of credit component of the
Credit Agreement  expires on May 31, 1998. The Company expects to renew the line
of credit component of the Credit Agreement following its expiration. The Credit
Agreement  contains  provisions with respect to the payment of dividends and the
level of capital expenditures and requires the maintenance of specific levels of
working capital,  tangible net worth and continued quarterly  profitability.  In
April 1997,  following  the  infusion of cash upon the  divestiture  of CAS, the
Company  prepaid,  on an accelerated  basis,  $3,000,000 of the then outstanding
principal balance of the secured loan.

Capital Expenditures:

The Company invested  $5,325,000 in 1997 in additions to property and equipment,
mainly computers, field equipment and the expansion of its equipment fabrication
facilities.  The Company is currently  exploring several sources of financing to
fund the anticipated expansion of its leachate evaporation system (LES) business
which is currently being offered on the equivalent of a design,  build,  operate
and finance basis. That  notwithstanding,  the Company believes that its cash on
hand and cash  generated  from  operations,  together  with its  available  bank
financing  will be sufficient  to meet the Company's  capital needs for at least
the next twelve months.

Year 2000:

The  Company  continues  to review  and  modify its  information  technology  to
recognize  the  Year  2000,  for its  critical  data  processing  systems,  both
internally and externally.  We currently  expect the project to be substantially
complete by early 1999,  with  minimal  costs.  We do not expect this project to
have a significant effect on operations.

                                       17





Item 8.       Financial Statements and Supplementary Data

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

                                                                          Page
                                                                         ------
Consolidated Statements of Operations for each of the 
   three years ended December 31, 1997, 1996, and 1995...........          19

Consolidated Balance Sheets as of December 31, 1997 and 1996.....          20

Consolidated Statements of Shareholders' Equity for each of 
   the three years ended December 31, 1997, 1996, and 1995.......          21

Consolidated Statements of Cash Flows for each of the three 
   years ended December 31, 1997, 1996, and 1995.................          22

Notes to Consolidated Financial Statements.......................          23

Report of Ernst & Young LLP, Independent Auditors................          39


                                       18



EMCON
CONSOLIDATED STATEMENTS OF OPERATIONS



 ---------------------------------------------------------------------- ------------------------------------------------
                                                                                   Years Ended December 31,
                                                                        ------------------------------------------------
 (In thousands, except per share amounts)                                    1997            1996             1995
 ---------------------------------------------------------------------- --------------- ---------------- ---------------
                                                                                                        
 Gross revenue                                                              $139,343        $137,626         $122,542
 Outside services at cost                                                     29,841          19,921           19,133
                                                                            --------        --------         --------

          Net revenue                                                        109,502         117,705          103,409

 Costs and expenses:
      Direct expenses                                                         56,134          52,608           39,473
      Indirect expenses                                                       49,782          65,844           61,498
      Restructuring/other charges                                               (586)          8,197              (17)
      Loss on disposition of laboratory                                          333           3,327               --
      Gain on sale of assets                                                  (1,026)             --               --
                                                                            ---------       --------         --------

          Income (loss) from operations                                        4,865         (12,271)           2,455

 Interest income                                                                 516             317              369
 Interest expense                                                             (1,251)         (1,112)            (181)
 Equity in income (loss) of affiliates                                            (2)            227              (74)
 Minority interest expense                                                      (810)           (188)              --
                                                                           ----------     -----------      -----------

 Income (loss) before provision (benefit) for
    income taxes                                                               3,318         (13,027)           2,569
 Provision (benefit) for income taxes                                          1,161          (2,936)             783
                                                                           ---------      -----------      ----------

 Net income (loss)                                                         $   2,157        $(10,091)       $   1,786
                                                                           =========        =========       =========

 Basic earnings (loss) per share                                           $    0.25        $  (1.19)       $    0.22
                                                                           =========        =========       =========

 Diluted earnings (loss) per share                                         $    0.25              --        $    0.21
                                                                           =========        =========       =========
                                                                                              
 Shares used in computing basic earnings (loss) per share                      8,549           8,485            8,274
                                                                           ==========       =========       =========

 Shares used in computing diluted earnings per share                           8,693              --            8,338
                                                                           ==========      ==========       =========


  See accompanying notes.

                                       19






EMCON 
CONSOLIDATED BALANCE SHEETS
- --------------------------------------------------------------------------------------------- --------------------------
                                                                                                    December 31,
                                                                                              ------------- ------------
 (In thousands, except share amounts)                                                             1997         1996
 -------------------------------------------------------------------------------------------- ------------- ------------
                                                                                                           
 ASSETS
 Current Assets:
 Cash and cash equivalents                                                                     $  6,106      $  5,331
 Accounts Receivable:
     Billed accounts receivable, net of allowance for doubtful accounts
       of $634 and $515 at December 31, 1997 and 1996, respectively                              31,413        24,697
     Unbilled accounts receivable, net of allowance for doubtful accounts
       of $295 and $436 at December 31, 1997 and 1996, respectively                               5,310         8,163
 Costs and estimated earnings in excess of billings on
     uncompleted contracts                                                                          678           904
 Prepaid expenses and other current assets                                                        3,401         1,908
 Inventory                                                                                        2,238           879
 Deferred taxes, current portion                                                                  4,235         1,638
 Assets held for sale                                                                                --         9,382
                                                                                              ----------     --------
     Total Current Assets                                                                        53,381        52,902

 Net property and equipment, at cost                                                             16,182        14,722
 Notes receivable                                                                                 2,811           600
 Cash surrender value of insurance policies                                                       2,346         1,707
 Other assets                                                                                     2,597         2,493
 Deferred tax assets                                                                              1,028         4,818
 Goodwill, net of amortization                                                                   13,916        12,716
 Other intangible assets, net of amortization                                                       814           954
                                                                                              ---------     ---------
     Total Assets                                                                               $93,075       $90,912
                                                                                                =======       =======
 LIABILITIES AND SHAREHOLDERS' EQUITY
 Current Liabilities:
 Accounts payable                                                                              $  8,391      $  5,483
 Accrued payroll and related benefits                                                             4,356         6,020
 Other accrued liabilities                                                                        2,969         4,454
 Billings in excess of costs and estimated earnings
     on uncompleted contracts                                                                     2,732            94
 Long-term obligations due within one year                                                        2,350         2,250
                                                                                               --------      --------
     Total Current Liabilities                                                                   20,798        18,301
 
 Long-term debt                                                                                   11,441        14,667
 Other noncurrent obligations                                                                    2,736         2,132
 Commitments and contingencies                                                                      --            --
 Shareholders' Equity:
 Preferred stock, no par value, 5,000,000 shares authorized;
     no shares issued or outstanding                                                                --            --
 Common stock, no par value, 15,000,000 shares authorized;
     8,571,764 and 8,512,688 shares issued and outstanding at
     December 31, 1997 and 1996, respectively                                                    42,184        42,001
 Retained earnings                                                                               15,916        13,811
                                                                                                -------       -------
     Total Shareholders' Equity                                                                  58,100        55,812
                                                                                                -------       -------
     Total Liabilities and Shareholders' Equity                                                 $93,075       $90,912
                                                                                                =======       =======


See accompanying notes.

                                       20





EMCON
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
 ---------------------------------------------------------------------------------------------------------------------------
                                                                                             Unrealized
                                                                                             Gain (Loss)
                                                                                                 on             Total
                                                         Common Stock          Retained      Marketable     Shareholders'
 (In thousands)                                       Shares      Amount       Earnings      Securities         Equity
 ---------------------------------------------------------------------------------------------------------------------------
                                                                                                    
Balance at December 31, 1994                            8,186     $40,958       $22,132      $   (31)          $63,059
 Issuance of common stock upon exercise of
   options, net of redemptions                             30          35            --                             35
 Income tax benefits of employee stock option
   exercises                                               --          50            --                             50
 Issuance of common stock under the Employee Stock
   Purchase Plan                                          114         369            --                            369
 Issuance of restricted stock, net of cancellation         (1)        (11)           --                            (11)
 Net change in unrealized losses on marketable
   securities                                              --          --            --           18                18
 Net income                                                --          --         1,786                          1,786
                                                     ----------------------------------------------------------------------

 Balance at December 31, 1995                           8,329      41,401        23,918          (13)           65,306
 Issuance of common stock upon exercise of
   options, net of redemptions                              5          15            --                             15
 Issuance of common stock under the Employee Stock
   Purchase Plan                                           88         258            --                            258
 Issuance of restricted stock, net of cancellation         91         327            --                            327
 Net change in unrealized losses on marketable
   securities                                              --          --            --           13                13
 Dividends paid                                            --          --           (16)                           (16)
 Net loss                                                  --          --       (10,091)                       (10,091)
                                                     -----------------------------------------------------------------------

 Balance at December 31, 1996                           8,513      42,001        13,811            0            55,812
 Issuance of common stock upon exercise of
   options, net of redemptions                             42         151            --                            151
 Issuance of common stock under the Employee Stock
   Purchase Plan                                           36          99            --                             99
 Cancellation of restricted stock                         (19)        (67)           --                            (67)
 Dividends paid                                            --          --           (52)                           (52)
 Net income                                                --          --         2,157                          2,157
                                                     -----------------------------------------------------------------------

 Balance at December 31, 1997                           8,572     $42,184       $15,916     $      0           $58,100
                                                     -----------------------------------------------------------------------


See accompanying notes.

                                       21





EMCON
CONSOLIDATED STATEMENTS OF CASH FLOWS

 ------------------------------------------------------------------------------- ------------------------------------------
                                                                                         Years Ended December 31,
 Increase (decrease) in cash and cash equivalents (in thousands)                      1997         1996           1995
 ------------------------------------------------------------------------------ ------------- --------------- -------------
                                                                                                            
 Cash flow from operating activities:
 Net income (loss)                                                                    $2,157      $(10,091)      $ 1,786
 Adjustments to reconcile net income (loss) to net cash
 provided by operating activities:
    Depreciation                                                                       3,808         7,330         4,487
    Amortization                                                                         652         1,034           613
    Bad debt expense                                                                   1,424           717         1,022
    Loss on sale/disposal of property and equipment                                      227           474           129
    Loss on disposition of laboratory                                                    333            --            --
    Gain on disposition of assets                                                     (1,026)           --            --
    Write-down of gas production rights                                                   --           247            --
    Impairment of goodwill                                                                --         6,194            --
    Increase in salary continuation plan                                                 102           133            62
    Changes in operating assets and liabilities:
        Accounts receivable                                                           (3,971)          509         2,376
        Costs in excess of billings                                                      226          (421)           --
        Inventory                                                                     (1,359)         (102)           --
        Prepaid expenses and other assets                                             (1,015)         (782)          302
        Notes receivable                                                              (2,211)         (257)         (206)
        Cash surrender value, insurance policies                                        (639)         (381)         (531)
        Other assets                                                                   2,425        (1,238)          (49)
        Deferred tax assets                                                            1,193        (3,616)          267
        Accounts payable                                                               2,912          (351)       (4,672)
        Accrued payroll and related benefits                                            (562)          661          (605)
        Billings in excess of costs                                                    2,638          (217)           --
        Other accrued liabilities                                                     (1,125)        1,740           251
 ------------------------------------------------------------------------------- ------------- --------------- ------------

           Net cash provided by operating activities                                   6,189         1,583         5,232
 ------------------------------------------------------------------------------- ------------- --------------- ------------
 Cash flow from investing activities:
    Additions to property and equipment                                               (5,325)       (2,484)       (4,082)
    Maturities of available for sale securities                                           --           514         1,953
    Net cash on disposition of laboratory                                              3,794            --            --
    Net cash from dispositions of assets                                               1,040            --            --
    Cash portion of assets held for sale                                                  --          (593)           --
    Acquisitions, net of cash acquired                                                  (858)      (13,827)           --
    Proceeds from sale of property and equipment                                         203           508           327
 ------------------------------------------------------------------------------- ------------- --------------- ------------

           Net cash used for investing activities                                     (1,146)      (15,882)       (1,802)
 ------------------------------------------------------------------------------- ------------- --------------- ------------
 Cash flow from financing activities:
    Proceeds of new debt obligation                                                    1,314        17,526           476
    Payments of current and noncurrent obligations                                    (5,731)       (7,931)           --
    Issuance of common stock for cash, net of cancellations                              201           600           393
    Dividend payments                                                                    (52)          (16)           --
 ------------------------------------------------------------------------------- ------------- --------------- ------------

           Net cash provided by (used for) financing activities                       (4,268)       10,179           869
 ------------------------------------------------------------------------------- ------------- --------------- ------------
 Increase (decrease) in cash and cash equivalents                                        775        (4,120)        4,299
 Cash and cash equivalents, beginning of year                                          5,331         9,451         5,152
 ------------------------------------------------------------------------------- ------------ --------------- -------------
 Cash and cash equivalents, end of year                                               $6,106       $ 5,331       $ 9,451
 ------------------------------------------------------------------------------- ------------ --------------- -------------

See accompanying notes.

                                       22



NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Summary of Significant Accounting Policies

Basis of Presentation:

The accompanying  consolidated  financial statements include the accounts of the
Company and its wholly owned  subsidiaries  after elimination of all significant
intercompany  accounts and  transactions.  Certain  amounts in the 1996 and 1995
financial statements have been reclassified to conform to the 1997 presentation.

In 1994,  the Company  converted  to a  fifty-two/fifty-three  week fiscal year,
resulting in a fifty-two week year in 1997 and a fifty-three  week year in 1996.
The  Company's  year end  falls  on the  Friday  closest  to the last day of the
calendar  quarter.  The Company also  follows a  five-four-four  week  quarterly
cycle.  While the actual  period  ends for the  fiscal  years 1997 and 1996 were
January 2, 1998 and January 3, 1997,  respectively,  for  convenience,  the date
shown on accompanying consolidated financial statements is December 31, the last
day of the calendar periods.

Use of Estimates in the Preparation of Financial Statements:

The preparation of financial  statements,  in conformity with generally accepted
accounting  principles,  requires  management to make estimates and  assumptions
that affect the reported  amounts of assets and  liabilities  and  disclosure of
contingent  assets and  liabilities at the date of the financial  statements and
the reported amounts of revenue and expenses during the reporting period. Actual
results could differ from those estimates.

Revenue Recognition and Expenses:

Revenue  from  engineering  service  contracts  is  recognized  as services  are
provided and revenue from construction projects is recognized on a percentage of
completion basis. The Company routinely subcontracts for outside services,  such
as drilling  and  specialized  laboratory  services.  These costs are  generally
passed through to the Company's customers. The Company believes net revenue is a
more accurate  measure of the value of its services than gross  revenue.  Direct
costs include  compensation  for billable hours for  professional  and technical
staff and other project expenses  reimbursed by clients.  Indirect costs include
compensation  for  non-billable  professional  and  technical  staff hours,  all
employee fringe benefits,  marketing,  and general and  administrative  expenses
such as rent, insurance, depreciation and amortization.

Cash and Cash Equivalents and Marketable Securities:

The Company considers all investment  instruments and marketable securities with
an original  maturity date of 90 days or less at the date of purchase to be cash
equivalents.  Management  determines  the  appropriate  classifications  of debt
securities  held as investments as either held to maturity or available for sale
at the time of purchase  and  reevaluates  such  designation  as of each balance
sheet date.  Investments  consisting primarily of high grade U.S. government and
corporate marketable debt securities are classified as  available-for-sale,  and
are carried at fair value,  based on quoted market  prices,  with the unrealized
gains and losses,  net of tax, reported in a separate component of shareholders'
equity. The cost of debt securities is adjusted for amortization of premiums and
accretion  of  discounts  to  maturity,  which is included  in interest  income.
Realized   gains   and   losses   and   declines   in   value   judged   to   be

                                       23



other-than-temporary,  as well as any interest on these securities, are included
in  interest  income.  The cost of  securities  sold is  based  on the  specific
identification  method.  There  were  no  debt  securities  held  as  investment
as of December 31, 1997.

Supplemental Cash Flow Information:

Cash paid for income taxes was  approximately  $1,673,000,  $659,000 and $58,000
for the years ended December 31, 1997,  1996 and 1995,  respectively.  Cash paid
for interest was approximately  $1,210,000,  $951,000 and $181,000 for the years
ended December 31, 1997, 1996 and 1995, respectively.

In 1995,  the Company sold certain land and buildings in exchange for $1,100,000
in marketable trade credits which will be used to reduce cash payments of future
recurring  corporate  expenses.  No significant gain or loss was incurred on the
transaction. The trade credits expire in eight years, and the Company expects to
utilize such credits prior to expiration. To date, $280,000 of the trade credits
have been applied to payments. The Company has agreements for the utilization of
an  additional  $400,000 of the trade  credits.  $225,000  and $175,000 of these
credits are  included on the  December 31, 1997  consolidated  balance  sheet in
other current assets and other assets,  respectively.  The remaining  balance of
$420,000 is included on the  December  31, 1997  consolidated  balance  sheet in
other assets.

Inventories:

Inventories  are  recorded  at the lower of cost using the  first-in,  first-out
method, or market.

Property and Equipment:

Property and equipment, net of assets held for sale, consists of (in thousands):
- --------------------------------------------------------------------------------
Years Ended December 31,                            1997          1996
- --------------------------------------------------------------------------------
Land and buildings                               $  4,683      $  2,808
Machinery and equipment                            19,895        18,886
Furniture and fixtures                              3,685         4,130
Vehicles                                            2,362         2,871
Leasehold improvements                              1,074         1,328
- --------------------------------------------------------------------------------
     Total                                         31,699        30,023
Less accumulated depreciation and amortization     15,517        15,301
- --------------------------------------------------------------------------------
Net property and equipment                        $16,182       $14,722
- --------------------------------------------------------------------------------
Property and equipment are stated at cost.  Depreciation  and  amortization  are
provided  on the  straight-line  basis over the lesser of the  estimated  useful
lives of the  assets or the term of the lease  (lives  range  from 3-31  years).
Amortization of property and equipment acquired under capital leases is included
with  depreciation  expense.  

Approximately  $3,963,000  and  $7,058,000  of fixed  assets net of  accumulated
depreciation  of $3,533,000 and $6,236,000  were sold or disposed of in 1997 and
1996, respectively.


                                       24

Basic and Diluted Net Income (Loss) per Share:

In 1997,  the Financial  Accounting  Standards  Board issued  Statement No. 128,
Earnings per Share.  Statement 128 replaced the calculation of primary and fully
diluted  earnings per share with basic and diluted  earnings  per share.  Unlike
primary  earnings  per share,  basic  earnings  per share  excludes any dilutive
effects of options,  warrants and convertible  securities.  Diluted earnings per
share is very similar to fully diluted earnings per share as previously computed
under  APB 15.  Income  (loss)  per  share  amounts  for all  periods  have been
presented, and where appropriate,  the presentation has been restated to conform
to the requirements under Statement 128.

Business Segment and Concentration of Credit Risk:

The Company operates within one business segment,  which provides  comprehensive
environmental  engineering,  consulting,  construction facilities operations and
maintenance,  and services to  industrial,  private and  governmental  concerns,
predominantly  in the waste  disposal,  petroleum,  wood products,  chemical and
manufacturing  industries;  as well as to utilities,  non-regulatory  government
entities,  financial  institutions  and real  estate  developers.  There  are no
significant  operations or revenues  generated from non United States locations.
Ongoing credit evaluations of its customers'  financial  condition are performed
by the Company, generally requiring no collateral.

In 1997, one customer accounted for approximately 10% of gross revenue; however,
excluding  subcontractor  fees,  this  customer  represented  approximately  one
percent of net revenue.  In 1996 and 1995,  no customer  accounted for more than
10% of gross revenue.

Recent Accounting Pronouncements:

In June 1997, the Financial Accounting Standards Board ("FASB") issued Statement
of Financial Accounting Standards No. 130, Reporting Comprehensive Income ("SFAS
130") and Statement of Financial Accounting Standards No. 131, Disclosures About
Segments  of an  Enterprise  and  Related  Information  ("SFAS  131").  SFAS 130
establishes  standards for the reporting and display of comprehensive income and
its components in the financial statements. Comprehensive income is comprised of
net income  (loss),  changes in the value of  available-for-sale  securities and
foreign currency translation adjustments,  and other such items disclosed in the
statement of stockholders'  equity.  SFAS 131 revises the manner in which public
companies report segment information in annual financial statements. The Company
will  adopt  SFAS 130 and SFAS 131 in the first  quarter  of 1998,  and based on
current  circumstances,  does  not  believe  the  effect  of  adoption  will  be
significant.

2. Contracts in Progress

Information related to contracts in progress (in thousands):
- --------------------------------------------------------------------------------
Years Ended December 31,                                1997         1996
- --------------------------------------------------------------------------------
Costs incurred on uncompleted contracts               $12,995        $4,181
Estimated earnings on uncompleted contracts             2,187           940
                                                     --------       -------
                                                       15,182         5,121
Less billings to date on uncompleted contracts         17,236         4,311
- --------------------------------------------------------------------------------
       Total                                         $ (2,054)        $ 810
- --------------------------------------------------------------------------------


                                       25



Included  in the  accompanying  consolidated  balance  sheets  on an  individual
contract basis are (in thousands):
- --------------------------------------------------------------------------------
Years Ended December 31,                                     1997        1996
- --------------------------------------------------------------------------------
Costs and estimated earnings in excess of billings
    on uncompleted contracts.                             $   678     $   904
Billings in excess of costs and estimated earnings
    on uncompleted contracts                               (2,732)        (94)
- --------------------------------------------------------------------------------
        Total                                             $(2,054)    $   810
- --------------------------------------------------------------------------------

3. Restructuring/Other Charges

In the  fourth  quarter  of  1996,  senior  management  reviewed  the  Company's
operational and  administrative  functions for the purpose of further  improving
the Company's  competitiveness and overall profitability.  Based on this review,
the  Company's  Board of Directors  approved a strategic  restructuring  plan in
December,  1996 to reposition the Company to fully exploit its core strengths in
engineering,  design,  construction,  operations and maintenance. As a result of
these actions, the Company recognized pre-tax restructuring and other charges of
$1,237,000 and $6,960,000,  respectively.  Included in the restructuring  charge
were $604,000  related to the closure or  downsizing of several  underperforming
offices,  $628,000 related to employee severance and the write-off of employment
contracts for former employees no longer actively participating in the Company's
affairs,  and a $5,000 adjustment to the 1994  restructuring  plan.  Included in
other charges were $4,768,000 related to the write-down in the carrying value of
goodwill associated with the Company's  continuing operating units in accordance
with the Statement of Financial  Accounting  Standards No. 121,  "Accounting for
the  Impairment of Long-Lived  Assets and for  Long-Lived  Assets to Be Disposed
Of", $1,529,000 related to the write-off of idle or disposed of assets, $368,000
related to the write-down of the Company's  landfill gas  production  rights and
related fixed assets,  and $156,000  related to the buyout and  cancellation  of
outstanding  stock  options  to  purchase  approximately  743,000  shares of the
Company's common stock held by employees of the Company. Also, included in other
charges were $139,000 for various  other  operational  costs.  Fair value of the
goodwill associated with the Company's  continuing  operating units was based on
each operating unit's expected future discounted cash flows.

As of December 31, 1997,  $328,000 of the 1996  restructuring  charges have been
incurred and $318,000 remains in other accrued  liabilities.  A net reduction of
$586,000 to the reserve was  recorded to reflect  lower than  anticipated  costs
associated with the abandonment and subsequent  sublease of certain office space
and lower than anticipated  severance costs due to retaining certain  previously
identified personnel.

In October,  1994,  as a result of changes in senior  management,  the Company's
Board of Directors  approved a corporate  restructuring  plan that  included the
write-off  of  employment  contracts  with  no  future  value,   termination  of
personnel,  and the  elimination or  abandonment of excess and under  performing
assets and facilities. During the twelve months ended December 31, 1997, $27,000
of cash  charges  related to the 1994  restructuring  were  incurred and charged
against the  established  reserve,  bringing the reserve to a zero  balance.  To
date,  $1,169,000 of  restructuring  costs have been incurred with no additional
cost anticipated.

                                       26



4. Impairment of Assets Held for Sale/Loss on Disposition of Laboratory

In December 1996, the Company executed a letter of intent to sell its laboratory
division, Columbia Analytical Services, Inc. ("CAS"), to the employees of CAS by
the first quarter of 1997. In anticipation  of the sale, the Company  recognized
an impairment in its investment in CAS of $3,327,000;  including a write-down in
the carrying value of goodwill associated with previous laboratory  acquisitions
of $1,426,000. For the year ended December 31, 1996, CAS had a loss before taxes
of $142,000.

During the first quarter of 1997,  the Company  completed the sale of CAS to the
employees of CAS for $4,000,000 in cash,  CAS'  promissory  notes for $3,219,000
("CAS  Notes")  and a  continuing  preferred  stock  interest  in CAS  valued at
$500,000.  The  Company  paid  $206,000  in  cash to CAS  for  retired  employee
contracts  and for  accelerated  vesting of stock  options and other  non-vested
stock rights. As a result of several closing adjustments, the Company recognized
an  additional  loss  on  disposition  of CAS in the  first  quarter  of 1997 of
$333,000.  CAS and the Company  also  entered  into a Master  Service  Agreement
relating to the continued  provision of laboratory  services to the Company (the
"MSA").  The CAS Notes are subject to offset,  in certain  circumstances,  based
upon the levels of future  revenues to CAS  accruing  under the MSA. The Company
currently  does not  anticipate  that any  material  offset will occur under the
terms of the MSA.

5.  Other Dispositions

During the first quarter of 1997,  the Company  completed the sale of one of its
landfill  gas-to-energy  projects,  including the related  leasehold  production
rights and associated machinery and equipment.  The Company recognized a gain on
disposition of the project of $1,026,000.

6. Acquisitions

Goodwill

Effective May 1, 1997,  Organic Waste  Technology,  Inc.  (OWT),  a wholly-owned
subsidiary of EMCON, acquired all of the outstanding equity interest in National
Earth  Products,  Inc.  (NEP),  a  Lancaster,  Pennsylvania-based  company  with
significant   expertise  in  landfill  civil   construction  and  related  soils
processing.  NEP was  acquired  for $933,000 in cash and the issuance of EMCON's
convertible  promissory  notes in the  aggregate  principal  amount of $800,000.
Approximately  50% of the  convertible  notes are due on May 1,  2000,  with the
balance due on May 1, 2002.  The  indebtedness  bears interest at the rate of 8%
per annum and is  convertible  into EMCON Common Stock at a conversion  price of
$6.50 per share.  The transaction was accounted for as a purchase.  Specifically
identifiable   intangible  assets  and  goodwill  of  approximately   $1,476,000
resulting from this acquisition are included in goodwill and are being amortized
over twenty-five years using the straight line method.  Accumulated amortization
as of December 31, 1997 was approximately $39,000.  Additional consideration may
be paid for the purchase of NEP subject to the  achievement  of certain earn out
goals over the next three years.  This acquisition would not have had a material
effect on net revenue, net income, or income per share, had it been effective at
January 1, 1997.

On February  29,  1996,  EMCON  acquired all the  outstanding  capital  stock of
Organic  Waste  Technologies,  Inc.  ("OWT"),  a Cleveland  based  construction,
equipment and operations and maintenance  company with significant  expertise in
solid waste  management.  The Company purchased OWT for $13,859,000 in cash plus

                                       27



the issuance of convertible  notes and other  contractual  indebtedness  held by
certain  senior  OWT  management  in the  principal  amount of  $1,747,000.  The
transaction was accounted for as a purchase.  The indebtedness bears interest at
the rate of 8% per annum with all  principal due and payable in full on March 1,
2001. The  indebtedness may be converted into shares of OWT common stock upon an
underwritten  public  offering of OWT's  common  stock in an amount in excess of
$10,000,000.  In the  event the  indebtedness  has not been  converted  into OWT
shares,  it may instead be  converted  into shares of EMCON  common  stock for a
period of ninety days after November 30, 2001 at a conversion price of $6.50 per
share. Goodwill of approximately $11,382,000, which included a $253,000 increase
resulting  from the  establishment  of a  deferred  tax  asset  related  to this
acquisition,  is being  amortized  over  thirty  years using the  straight  line
method. Related accumulated amortization at December 31, 1997, was approximately
$689,000.

     The following  summarizes  the unaudited pro forma net revenue,  net income
(loss),  and income  (loss) per share of the combined  company for the unaudited
twelve  months ended  December 31, 1996  compared to the audited  twelve  months
ended December 31, 1997 (in thousands):
- --------------------------------------------------------------------------------
                                                                 Pro Forma
                                                1997               1996
Twelve months ended December 31,             (audited)          (unaudited)
- -------------------------------------------------------------- -----------------
Net revenue                                    $109,502          $120,738
Net income (loss)                                 2,157           (10,407)
Income (loss) per share                           $0.25            ($1.23)
- --------------------------------------------------------------------------------
The above pro forma  results of  operations do not purport to reflect the actual
results of operations had the Company actually  acquired OWT as of the beginning
of 1996.

Effective April 1, 1994, the Company acquired all of the capital stock of Wehran
Envirotech,  Inc. ("Wehran"),  an environmental consulting company headquartered
in Middletown,  New York, in exchange for 410,000 shares of the Company's common
stock  valued at  $2,818,000  and  $439,000  in direct  acquisition  costs.  The
transaction was accounted for as a purchase. An additional 80,000 shares, valued
at $290,000, were issued to Wehran shareholders in December, 1994 as a result of
their attaining certain  predetermined  operating performance goals. Goodwill of
approximately $1,896,000 resulting from this acquisition is being amortized over
twenty years using the  straight  line method.  Accumulated  amortization  as of
December 31, 1997,  was  approximately  $348,000.  Subsequent to the purchase of
Wehran,  the Company issued an additional  425,000 shares of its common stock to
retire approximately  $5,000,000 of Wehran's convertible  subordinated notes. In
addition,  the Company  also paid  approximately  $6,100,000  in cash to satisfy
amounts  borrowed  against  Wehran's  revolving  credit  line  ($5,000,000)  and
obligations due to settlement of certain litigation ($1,100,000).

Acquisitions  made by the  Company  from  1992  through  1993 have  resulted  in
goodwill of approximately  $1,216,000  which is included with intangible  assets
and is being amortized over a period of 20 years using the straight-line method.
Related  accumulated  amortization  was  approximately  $979,000 at December 31,
1997.

Other Intangible Assets:

Intangible  assets included  $879,000 at December 31, 1996,  representing  gross
costs incurred to obtain landfill gas production rights. The related accumulated
amortization was approximately $798,000 at December 31, 1996. In December, 1996,
the  Company  reduced  the  value of these  landfill  gas  production  rights by

                                       28



$247,000 to their  estimated  fair value,  and, at December 31, 1997,  they were
fully amortized.

Other   intangible   assets  at  December  31,  1997,  also  include   $888,000,
representing the gross cost to reacquire  certain patent rights  associated with
the Company's  proprietary leachate  evaporation system technology.  Accumulated
amortization at December 31, 1997, was  approximately  $74,000 and the patent is
being amortized over the 15 year life of the patent.

7. Other Noncurrent Obligations

Certain employees  participate in a salary  continuation plan which will provide
the employees with a 10-year  benefit from the Company.  Monthly  benefits range
from $600 to $4,500, and the employees vest in varying amounts from the fifth to
the tenth  anniversary  date of their  contracts.  Such  amounts will be paid in
addition to those payments due specifically as  consideration  for the employees
meeting the non-competition provisions of their contracts.

Included in other  noncurrent  obligations are the Company's  liabilities  under
salary continuation agreements. Liabilities under salary continuation agreements
were $1,088,000 and $939,000 at December 31, 1997 and 1996, respectively.  These
liabilities have been funded through insurance policies.

Capital lease obligations are included in property and equipment with a cost and
accumulated depreciation of $87,000 and $44,000,  respectively,  at December 31,
1997, and $324,000 and $80,000, respectively, at December 31, 1996.

8. Retirement Plan

The Company  sponsors a qualified  retirement plan,  generally  available to all
employees,  which is based on Section 401(k) of the Internal Revenue.  Employees
may elect to contribute up to 20% of their annual compensation to the plan up to
the Internal Revenue Service annual contribution limit of $9,500 for 1997. Prior
to 1997,  the Company  voluntarily  matched  the  employee's  contribution  to a
maximum of 3% of annual  compensation.  In 1997, the Company  elected to suspend
the Company  match.  The Company's  contributions  to the  retirement  plan were
$1,146,000,  and  $1,177,000  for the years  ended  December  31, 1996 and 1995,
respectively.

                                       29




9. Commitments

The Company leases its office  facilities,  as well as office  equipment,  under
operating leases in various  locations.  Until 1995,  certain office  facilities
were leased from  partnerships in which certain officers and shareholders of the
Company had controlling interests. Lease arrangements with the partnerships were
terminated  in 1995.  The  annual  rents  under  leases  from  partnerships  was
approximately  $473,000 for 1995. The Company's minimum annual lease commitments
under all operating leases are approximately (in thousands):
- --------------------------------------------------------------------------------
Years Ending December 31,
- --------------------------------------------------------------------------------
1998                                                                     $4,808
1999                                                                      3,921
2000                                                                      2,748
2001                                                                      1,623
2002                                                                        961
- --------------------------------------------------------------------------------
Rent expense was  approximately  $5,523,000,  $5,263,000 and $4,429,000 for
the years ended December 31, 1997, 1996 and 1995, respectively.

Certain employees have signed non-competition agreements which will provide them
with  monthly  payments  from  $400 to $3,000  for a period of up to ten  years,
commencing on the tenth anniversary date of the agreements. (See note 7.)

10. Litigation

As a firm  engaged in  environmental-related  matters,  the  Company  encounters
potential liability,  including claims for significant  environmental damage, in
the normal course of business.  The Company is party to lawsuits and is aware of
potential exposure related to certain claims. In the fourth quarter of 1996, the
Company agreed to settlement terms on a number of outstanding legal matters.  At
the same time, the Company assessed the potential exposure relative to all other
known pending matters.  Based on the foregoing,  the Company increased its legal
reserve by an additional  $1,553,000 at December 31, 1996. No increases to legal
reserves  occurred in 1997. In the opinion of management,  the resolution of all
known lawsuits/claims at amounts in excess of established reserves will not have
a material  adverse  affect on the Company's  consolidated  financial  position,
results of operations or cash flows.

                                       30



11. Long-term Debt



Long-term debt consists of the following (in thousands):
- ---------------------------------------------------------------------------------------- --------------- -------------
Years Ended December 31,                                                                        1997           1996
- ---------------------------------------------------------------------------------------- --------------- -------------
                                                                                                       
Variable-rate note payable to bank
     (effective  rate at 12/31/97  was 7.46%).  Payable in  quarterly  installments  of       $4,857         $ 9,286
     $357  with a final  payment  of $3,214 in 2001.  Collateralized  by the  assets of
     EMCON.
8.00%  unsecured  notes  payable  to  certain  former  OWT  shareholders.   Payable  on        1,747           1,747
     termination  date in 2001.  This debt may be converted  into common  stock
     at $6.50 per share.  Conversion of debt, if it occurs,  would be within ninety days 
     after November 30, 2001.
7.99% note payable to bank in monthly installments  through 2006.  Cross-collateralized        4,285           4,661
     by the assets of OWT with a net book value of $7,823.
8.49% note payable to bank in monthly  installments  through  2001.  Collateralized  by          284             374
     equipment of OWT with a net book value of $337.
8.99% note payable to bank in monthly installments  through 2000.  Cross-collateralized          206             296
     by the assets of OWT with a net book value of $7,823.
7.89% note payable to bank in monthly installments  through 2012.  Cross-collateralized        1,158              --
     by the assets of OWT with a net book value of $7,823.
8.00% unsecured notes payable to former NEP shareholders.  Approximately                         800              --
     50% of the  convertible  notes are due on May 1, 2000 with the  balance due on May
     1,  2002.  This  debt may be  converted  into common stock at $6.50  per
     share.  Conversion of debt, if it occurs,  would be 50% on May 1, 2000, and 50% on
     May 1, 2002.
9.07%  note  payable  to  finance  company  in  monthly   installments   through  2001.          142              --
     Collateralized by equipment of NEP with a net book value of $88.
Other  indebtedness,  interest  rates vary from 5.3% to 15.9%  payable in  installments          312             553
    through 2000.  (Primarily lease obligations)
                                                                                         --------------- -------------
Total Long-term Debt                                                                         $13,791         $16,917
Less current portion                                                                         $ 2,350         $ 2,250
- ---------------------------------------------------------------------------------------- --------------- -------------
Long-term Debt, net of current portion                                                       $11,441         $14,667
- ---------------------------------------------------------------------------------------- --------------- -------------


Interest  paid on all  outstanding  debt  amounted  to  $1,135,000  in 1997  and
$951,000 in 1996.

Aggregate  principal  payments for the next five years for years ending December
31,
- --------------------------------------------------------------------------------
1998                                                                $  2,350
1999                                                                   2,173
2000                                                                   2,937
2001                                                                   2,899
2002 and thereafter                                                    3,432
- --------------------------------------------------------------------------------

In  conjunction  with  the  acquisition  of  OWT,  the  Company  entered  into a
$20,000,000   secured  Credit  Agreement  with  its  existing  commercial  bank,

                                       31



replacing  its  previous  $10,000,000  unsecured  line of credit.  Under the new
agreement,  the Company borrowed  $10,000,000 on a term loan basis with interest
at a managed  rate not to exceed the prime rate.  Principal  is to be  amortized
over seven years, but with any unpaid amount finally due and payable on June 30,
2001.  The  remaining  $10,000,000  under the Credit  Agreement is available for
working  capital  purposes  (with up to  $5,000,000  also  being  available  for
non-working  capital  purposes).  The line of  credit  component  of the  Credit
Agreement  expires on May 31,  1998.  The  Company  expects to renew the line of
credit  component of the Credit Agreement  following its expiration.  The Credit
Agreement  contains  provisions with respect to the payment of dividends and the
level of capital expenditures and requires the maintenance of specific levels of
working capital, tangible net worth and continued quarterly profitability. As of
December 31, 1997, the Company was in compliance with all debt covenants.

12. Shareholders' Equity

Preferred Stock:

The Board of Directors of the Company has the authority to determine the rights,
preferences, privileges and restrictions of the authorized preferred stock.

Stock Option and Restricted Stock Plans:

The Company has issued  options to purchase  shares of common stock  pursuant to
its 1986 and 1988  Incentive  Stock Option Plans (both  expired in 1997).  These
options were granted with option  exercise  prices which are equal to 100%, 105%
or 110% of fair market value on the date of grant, and expire over terms ranging
from five to ten years.  Options  generally vest ratably over a two year or four
year period.

The Company's  Restricted  Stock Plan was approved by its  shareholders  in May,
1991. A total of 225,000 shares of the Company's  Common Stock were reserved for
issuance under the Restricted Stock Plan.  Shares granted to employees under the
Restricted Stock Plan generally vest in equal annual  installments  over periods
ranging  from three to four years.  At December 31,  1997,  118,361  shares were
available for issuance.


                                       32





A summary of activity of the Plans follows:
 --------------------------------------------------------- --------------------------------------------------------
                                                                             Options Outstanding
                                                           -------------- ---------------------- ------------------
                                           Available          Number              Price              Aggregate
                                           for Grant         of Shares          Per Share              Value
 ------------------------------------ -------------------- -------------- ---------------------- ------------------
                                                                                            

Balance at December 31, 1994                838,284           2,226,337      $1.15 - $11.25         $17,446,023
Options granted                            (386,650)            386,650      $3.50 - $ 4.88           1,545,537
Options canceled                             72,629             (72,629)     $3.33 - $10.00            (591,701)
Options exercised                             --                (30,000)          $1.15                 (34,666)
- ------------------------------------- -------------------- -------------- ---------------------- ------------------

Balance at December 31, 1995                524,263           2,510,358      $3.33 - $11.25         $18,365,193
Options granted                            (192,448)            192,448      $3.25 - $ 4.88             728,144
Options canceled                          1,518,674          (1,518,674)     $3.33 - $ 11.25        (12,357,381)
Options exercised                             --                 (4,700)     $3.33 - $ 3.50             (15,698)
- ------------------------------------- -------------------- -------------- ---------------------- ------------------

Balance at December 31, 1996              1,850,489           1,179,432      $3.25 - $11.25         $ 6,720,258
Options granted                          (1,261,500)          1,261,500      $3.13 - $ 5.00           5,250,375
Options canceled                            534,043            (534,043)     $3.25 - $11.25          (3,030,431)
Options exercised                             --                (42,374)     $3.33 - $ 3.75            (150,621)
Options expired                          (1,004,671)              --                   --                --
                                                                                   --
- ------------------------------------- -------------------- -------------- ---------------------- ------------------

Balance at December 31, 1997                118,361           1,864,515      $3.13 - $10.00         $ 8,789,581
- ------------------------------------- -------------------- -------------- ---------------------- ------------------


Employee Stock Purchase Plan:

The EMCON Employee Stock Purchase Plan (ESPP)  provided that  substantially  all
employees  could purchase the Company's  common stock at a price equal to 85% of
its fair value on  certain  specified  dates via a payroll  deduction  plan.  At
December 31, 1996,  248,338  shares were  available  for  issuance.  The Company
discontinued the ESPP effective February 1, 1997.

Stock-Based Compensation:

As  permitted  under  FASB  Statement  No.  123,   "Accounting  for  Stock-Based
Compensation"   (FASB  123),  the  Company  has  elected  to  follow  Accounting
Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees" (APB
25) in accounting for stock-based awards to employees. Under APB 25, the Company
generally recognizes no compensation expense with respect to such awards.

Pro Forma information  regarding net income (loss) and earnings (loss) per share
is required by FASB 123 for awards  granted  after  December 31, 1994, as if the
Company had accounted  for its  stock-based  awards to employees  under the fair
value method of FASB 123. For these  purposes,  the fair value of the  Company's
stock-based  awards to employees  was  estimated  using a  Black-Scholes  option
valuation model. The Black-Scholes  option valuation model was developed for use
in  estimating   the  fair  value  of  traded  options  which  have  no  vesting
restrictions and are fully  transferable.  In addition,  the Black-Scholes model
requires the input of highly subjective assumptions including the expected stock
price  volatility.  Because the Company's  stock-based  awards to employees have
characteristics  significantly  different  from  those of  traded  options,  and
because changes in the subjective  input  assumptions can materially  affect the
fair  value  estimate,  in  management's  opinion,  the  existing  models do not
necessarily  provide  a  reliable  single  measure  of  the  fair  value  of its
stock-based  awards to employees.  The fair value of the  Company's  stock-based
awards to  employees  was  estimated  assuming  no  expected  dividends  and the
following weighted-average assumptions.

                                       33



- --------------------------------------------------------------------------------
                                     Options                      ESPP
                                     -------                      ----
                           1997       1996      1995     1997    1996     1995
- --------------------------------------------------------------------------------
Expected life (years)       4.5        6.6       7.0      --      0.5      0.5
Expected volatility         .66        .49       .49      --      .32      .42
Risk-free interest rate     6.1%       6.1%      6.3%     --      5.5%     6.1%
- --------------------------------------------------------------------------------

For pro forma  purposes,  the estimated fair value of the Company's  stock-based
awards to employees is amortized over the options'  vesting period (for options)
and the six-month  purchase  period (for stock  purchases  under the ESPP).  The
Company's pro forma information follows:



- ----------------------------------------------------------------------- ------------ -------------- -----------------

In thousands except for earnings (loss) per share information             1997           1996             1995
- ----------------------------------------------------------------------- ------------ -------------- -----------------
                                                                                                    
Net income (loss)
     As reported                                                        $2,157          $(10,091)          $1,786
     Pro forma                                                          $1,710          $(10,393)          $1,688
Basic (loss) earnings per share
     As reported                                                        $ 0.25          $  (1.19)          $ 0.22
     Pro forma                                                          $ 0.20          $  (1.27)          $ 0.20
- ----------------------------------------------------------------------- ------------ -------------- -----------------


Because FASB 123 is applicable only to awards granted subsequent to December 31,
1994, its pro forma effect will not be fully reflected until approximately 1999.

The weighted  average fair value of options  granted during 1997,  1996 and 1995
was $2.11, $2.14 and $2.30 per share, respectively.

The following  summarizes  information about fixed stock options  outstanding at
December 31, 1997:



- ----------------------------------------------------------------------------------- ---------------------------------
                               Options Outstanding                                        Options Exercisable
                                                                      Weighted                            Weighted
                             Number          Weighted Average          Average                            Average
   Range of Exercise     Outstanding at    Remaining Contractual   Exercise Price   Number Exercisable    Exercise
        Prices              12/31/97               Life                                                    Price
- ------------------------ ---------------- ------------------------ ---------------- ------------------- -------------
                                                                                                              
    $9.25 - $10.00             172,750             4.6                  $9.31             172,750           $9.31
    $6.50 - $ 8.83              72,950             5.6                  $6.98              62,700           $6.98
    $5.00 - $ 6.00             669,125             5.0                  $5.01              12,750           $5.28
    $3.13 - $ 4.88             949,690             5.3                  $3.50             166,953           $3.93
- ------------------------ ---------------- ------------------------ ---------------- ------------------- -------------
    $3.13 - $10.00           1,864,515             5.2                  $4.71             415,153           $6.67
- ------------------------ ---------------- ------------------------ ---------------- ------------------- -------------


December 31, 1996,  673,400 shares were exercisable at an average exercise price
of $6.93 per share.

In December,  1996 employees  (other than officers and  directors)  with options
having  exercise  prices of $5.00 per share or  greater  were given the right to
either sell back their options to the Company, to exchange their options for new
options,  to retain their original  options or elect a combination of the three.
The rates at which the  outstanding  options  could be exchanged or sold back to
the Company varied depending on the original option exercise price. Participants
could  exchange  their  outstanding  stock options for newly granted  options at
rates  ranging  from one new share for every three old option  shares to one new
share for every five old option shares.  Alternatively,  participants could sell
back their options at prices ranging from $0.10 to $0.40 per option share.  This
resulted in options of 743,319 shares being  canceled for a cash  settlement of

                                       34


approximately  $156,000,  and an additional  203,727 shares canceled in exchange
for the grant of new options  covering  47,247  shares  with an option  exercise
price of $3.68 per share.

13.  Earnings Per Share



- ------------------------------------------------------------------- ----------------------------------------------
                                                                                 Years Ended December 31,
 (In thousands, except for earnings per share)                             1997             1996           1995
- ------------------------------------------------------------------- ----------------- --------------- --------------
                                                                                                    
 Numerator:
     Net income (loss)                                                    $ 2,157         $(10,091)        $ 1,786
                                                                          -------         ---------        -------
     Numerator for basic earnings per share -
         income (loss) available to common stockholders                   $ 2,157         $(10,091)        $ 1,786

     Effect of dilutive securities:
         8% convertible debentures                                            N/A(1)            --             N/A
                                                                         --------         ----------       -------

     Numerator for diluted earnings per share -
         income (loss) available to common stockholders
         after assumed conversions                                        $ 2,157         $(10,091)        $ 1,786
                                                                          -------         ---------        -------

  Denominator:
     Denominator for basic earnings (loss) per share -
       weighted-average shares                                              8,549            8,485           8,274

     Effect of dilutive securities:
         Employee stock options                                               144               --              64
         8% convertible debentures                                            N/A(1)            --             N/A
                                                                          -------         ---------        --------

     Dilutive potential common shares
     Denominator for diluted earnings per share -
         adjusted weighted average shares and assumed
         conversions                                                        8,693               --           8,338
                                                                        =========         ==========       =========

     Basic earnings (loss) per share                                    $    0.25         $  (1.19)        $  0.22
                                                                        =========         ==========       =========

     Diluted earnings per share                                         $    0.25               --         $  0.21
                                                                        =========         ==========       =========

 ------------------------------------------------------------------- ---------------- ----------------- -------------


(1)Excluded from the above  reconciliations were approximately 269,000 shares of
common  stock  that may be issued at $6.50 per share to  convert  $1,747,000  of
indebtedness to certain senior  management of OWT because they were antidilutive
at December 31, 1997.  Conversion of debt, if it occurs,  would be within ninety
days after November 30, 2001.

Also excluded from the above  reconciliations were approximately  123,000 shares
of common  stock  that may be issued at $6.50 per share to convert  $800,000  of
indebtedness to certain senior  management of NEP because they were antidilutive
at December 31, 1997.  Conversion of debt, if it occurs,  would be 50% at May 1,
2000, and 50% at May 1, 2002.


                                       35



14.  Income Taxes

The  provision  (benefit)  for  income  taxes  consists  of  the  following  (in
thousands):


- ------------------------------------------------------------------------- ------------ ------------- --------------
Years Ended December 31,                                                     1997          1996          1995
- ------------------------------------------------------------------------- ------------ ------------- --------------
                                                                                                       
Federal:
   Current                                                                   $   43     $    607           $438
   Deferred                                                                     832       (3,358)            61
- ------------------------------------------------------------------------- ------------ ------------- --------------
        Total Federal                                                           875       (2,751)           499
- ------------------------------------------------------------------------- ------------ ------------- --------------
State:
   Current                                                                      179           73             78
   Deferred                                                                     107         (258)           206
- ------------------------------------------------------------------------- ------------ ------------- --------------
        Total State                                                             286         (185)           284
- ------------------------------------------------------------------------- ------------ ------------- --------------
        Total Federal and State                                              $1,161      $(2,936)          $783
- ------------------------------------------------------------------------- ------------ ------------- --------------


A  reconciliation  between the  Company's  effective  tax rate of 35.0% in 1997,
(22.5%) in 1996 and 30.5% in 1995 and the U.S.  statutory rate is as follows (in
thousands):


- ------------------------------------------------------------------------- ------------ -------------- --------------
Years Ended December 31,                                                     1997          1996           1995
- ------------------------------------------------------------------------- ------------ -------------- --------------
                                                                                                    
Tax at U.S. statutory rate                                                   $1,128      $(4,559)           $899
State taxes, net of federal benefit                                             189         (280)            149
Fuel tax credits                                                               (416)        (454)           (515)
Goodwill amortization                                                           180        2,306             150
Meals and entertainment                                                          90           94             105
Other individually immaterial items                                             (10)         (43)             (5)
- ------------------------------------------------------------------------- ------------ -------------- --------------
        Total Federal and State                                              $1,161      $(2,936)           $783
- ------------------------------------------------------------------------- ------------ -------------- --------------

As of December 31, 1997, the Company has federal  alternative minimum tax credit
carryforwards of approximately $1,980,000 which have no expiration date.


                                       36



Deferred  income  taxes  reflect  the net tax effects of  temporary  differences
between the carrying  amounts of assets and liabilities for financial  reporting
purposes and the amounts used for income tax purposes. Significant components of
the Company's deferred tax assets and liabilities  consisted of the following at
(in thousands):


- -------------------------------------------------------------------------------------------- ---------- ------------
Years Ended December 31,                                                                       1997        1996
- -------------------------------------------------------------------------------------------- ---------- ------------
                                                                                                    
Deferred tax assets:
     Alternative minimum tax credit carryforwards                                              $1,980     $2,327
     Deferred compensation                                                                        342        340
     Allowance for doubtful accounts                                                              318        403
     Vacation accruals                                                                            582        636
     Restructuring accruals                                                                     2,330      3,145
     Other individually immaterial items                                                          221        424
- -------------------------------------------------------------------------------------------- ---------- ------------
         Total deferred tax assets                                                             $5,773     $7,275
- -------------------------------------------------------------------------------------------- ---------- ------------
Deferred tax liabilities:
     Tax over book depreciation                                                               $   436    $   532
     Tax accounting method changes                                                                 72         70
     Payment liabilities deducted                                                                   2        108
     Supplies                                                                                      --        110
- -------------------------------------------------------------------------------------------- ---------- ------------
         Total deferred tax liabilities                                                       $   510    $   820
- -------------------------------------------------------------------------------------------- ---------- ------------
Total net deferred tax assets                                                                  $5,263     $6,455
- -------------------------------------------------------------------------------------------- ---------- ------------

15.  Related Party Transactions

The Company's Chief Financial Officer, currently serves as a member of the Board
of  Directors  of  Columbia  Analytical  Services,  Inc.  (CAS),  an  analytical
laboratory company in which the Company retains a minority interest. CAS remains
a significant outside vendor of laboratory services to the Company.


                                       37




16.  Quarterly Data (unaudited)

 -----------------------------------------------------------------------------------------------------------------
 (In thousands                                             First           Second          Third           Fourth
 except per share amounts)                                Quarter         Quarter         Quarter         Quarter
 -----------------------------------------------------------------------------------------------------------------
                                                                                               
 1996
 Gross revenue                                            $28,564          $35,881         $36,416        $36,765
 Net revenue                                               24,607           30,542          31,560         30,996
 Income (loss) from operations                                119              790             582        (13,762)
 Net income (loss)                                             34              365             259        (10,749)
 Basic earnings (loss) per share                          $  0.00          $  0.04         $  0.03        $ (1.26)
 Diluted earnings per share                               $  0.00          $  0.04         $  0.03           --
 -----------------------------------------------------------------------------------------------------------------
 1997
 Gross revenue                                            $31,363          $33,114         $40,764        $34,102
 Net revenue                                               27,581           24,467          29,899         27,555
 Income from operations                                     1,317            1,084           1,789            675
 Net income                                                   691              494             943             29
 Basic earnings per share                                 $  0.08          $  0.06         $  0.11        $  0.00
 Diluted earnings per share                               $  0.08          $  0.06         $  0.11        $  0.00
 -----------------------------------------------------------------------------------------------------------------


Historically,  the Company's net revenue is adversely  affected in the first and
fourth quarters of each year, primarily as a result of restricted field work due
to weather conditions.

                                       38


                         REPORT OF INDEPENDENT AUDITORS

The Board of Directors and Shareholders
EMCON

We have  audited the  accompanying  consolidated  balance  sheets of EMCON as of
December  31,  1997  and  1996,  and  the  related  consolidated  statements  of
operations,  shareholders' equity, and cash flows for each of the three years in
the period  ended  December  31, 1997.  Our audits also  included the  financial
statement schedule listed in the Index at Item 14(a). These financial statements
and  schedule  are  the   responsibility  of  the  Company's   management.   Our
responsibility  is to  express  an opinion  on these  financial  statements  and
schedule based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated  financial statements referred to above present
fairly, in all material respects,  the consolidated  financial position of EMCON
at December 31, 1997 and 1996,  and the  consolidated  results of its operations
and its cash flows for each of the three years in the period ended  December 31,
1997, in conformity with generally accepted accounting principles.  Also, in our
opinion,  the related financial statement schedule,  when considered in relation
to the  basic  financial  statements  taken as a whole,  presents  fairly in all
material respects the information set forth therein.

                                                               ERNST & YOUNG LLP

San Francisco, California
February 18, 1998

                                       39



Item 9.       Changes in and  Disagreements  with  Accountants on Accounting and
              Financial Disclosure

None
                                    PART III


Item 10.      Directors and Executive Officers of the Registrant

       The  information  required under this Item is  incorporated  by reference
from the  Registrant's  definitive  proxy  statement for the  Registrant's  1998
Annual Meeting of Shareholders  to be filed with the Commission  within 120 days
of the end of Registrant's fiscal year ended December 31, 1997.

Item 11.      Executive Compensation

       The  information  required under this Item is  incorporated  by reference
from the  Registrant's  definitive  proxy  statement for the  Registrant's  1998
Annual Meeting of Shareholders  to be filed with the Commission  within 120 days
of the end of Registrant's fiscal year ended December 31, 1997.

Item 12.      Security Ownership of Certain Beneficial Owners and Management

       The  information  required under this Item is  incorporated  by reference
from the  Registrant's  definitive  proxy  statement for the  Registrant's  1998
Annual Meeting of Shareholders  to be filed with the Commission  within 120 days
of the end of Registrant's fiscal year ended December 31, 1997.

Item 13.      Certain Relationships and Related Transactions

       The  information  required under this Item is  incorporated  by reference
from the  Registrant's  definitive  proxy  statement for the  Registrant's  1998
Annual Meeting of Shareholders  to be filed with the Commission  within 120 days
of the end of Registrant's fiscal year ended December 31, 1997.

                                       40




                                     PART IV

Item 14.  Exhibits, Financial Statement Schedules, 
          and Reports on Form 8-K                                      Page
                                                                      
(a)(1)    Financial Statements                                          18

(a)(2)    Schedule II - Valuation and Qualifying Accounts               43

(b)       Reports on Form 8-K                                           --

          No  reports  on Form 8-K were  filed  during  the  
          quarter  ended December 31, 1997.

(c)       Index to Exhibits                                             44

            Exhibits filed  herewith and attached  hereto under
            separate cover or incorporated by reference  herein
            will  be  furnished  to  security  holders  of  the
            Registrant  upon  written  request and payment of a
            fee of $.30  per page  which  fee  covers  only the
            Registrant's reasonable expenses in furnishing such
            exhibits.




                                       41



                                   SIGNATURES

       Pursuant  to the  requirements  of Section 13 or 15(d) of the  Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                      EMCON

Dated:    3/27/97            By     /s/ Eugene M. Herson
        -----------                 --------------------
                                    Eugene M. Herson
                                    President and Chief Executive Officer

       Pursuant to the requirements of the Securities Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
Registrant in the capacities and on the dates indicated.

       Signature                     Title                            Date
       ---------                     -----                            ----
/s/ Douglas P. Crane       Chairman of the Board and Director     March 27, 1998
- --------------------
Douglas P. Crane

/s/ Eugene M. Herson       President, Chief Executive Officer     March 27, 1998
- --------------------       and Director (Principal Executive 
Eugene M. Herson           Officer)
                       

/s/ R. Michael Momboisse   Chief Financial Officer, 
- ------------------------   Vice President - Legal and             March 27, 1998
R. Michael Momboisse       Secretary (Principal Financial 
                           and Accounting Officer)

/s/ Donald R. Andres       Vice President and Director            March 27, 1998
- --------------------        
Donald R. Andres

/s/ Richard A. Peluso      Vice President and Director            March 27, 1998
- ---------------------
Richard A. Peluso

/s/ Donald R. Kerstetter   Director                               March 27, 1998
- ------------------------
Donald R. Kerstetter

/s/ Jack M. Marzluft       Director                               March 27, 1998
- --------------------
Jack M. Marzluft

/s/ Peter Vardy            Director                               March 27, 1998
- ---------------
Peter Vardy

                                       42




                                   SCHEDULE II

                                      EMCON
                        VALUATION AND QUALIFYING ACCOUNTS

                                 (In Thousands)





                                               Additions
                            Balance           Charged to                         Balance
                          at Beginning         Costs and                         at End
                           of Period           Expenses        Write-Offs       of Period
Allowance for
Doubtful Accounts:

                                                                          
Year Ended
December 31, 1995          $  975            $  765            $  (688)         $1,052

Year Ended
December 31, 1996          $1,052            $1,985            $(2,086)         $  951

Year Ended
December 31, 1997          $  951            $1,295            $(1,317)         $  929




                                       43



                                INDEX TO EXHIBITS
                                                                   Sequentially
Exhibit                                                              Numbered
Number                                                                 Page
- --------------                                                     ------------
2.1       Stock Purchase Agreement dated January 30, 1996,              * 
          among Organic Waste Technologies, Inc. ("OWT"), 
          Registrant and the selling shareholders and option
          holders of OWT, incorporated by reference from 
          Exhibit 2.1 of the Current Report on Form 8-K dated 
          March 14, 1996, (the "March 1996 8-K").

2.2       Asset Purchase Agreement between Yolo Energy Partners,        *
          Inc., Yolo Landfill Gas Corporation, EMCON, Yolo Neo 
          LLC, and Minnesota Methane LLC dated December 31,
          1996, incorporated by reference from Exhibit 10.20 
          of the Annual Report on Form 10-K for the fiscal year 
          ended December 31, 1996 (the "1996 10-K").

2.3       Acquisition Agreement  between EMCON and its wholly           *
          owned subsidiary, Monterey Landfill Gas Corporation, 
          and Biomass Energy Partners V, L.P., dated March 6,
          1997, incorporated by reference from Exhibit 10.22 
          of the 1996 10-K.

2.4       Stock Purchase Agreement dated April 4, 1997 among            *
          Registrant, Columbia Analytical Services, Inc. (`CAS"),
          Northwest Trust as trustee of the CAS Employee Stock 
          Ownership Trust and certain senior management employees 
          of CAS, incorporated by reference from Exhibit 2.4 of 
          the Registrant's Quarterly Report on Form 10-Q for the 
          fiscal quarter ended March 31, 1997 (the "March 1997 
          10-Q").

2.5       Stock Purchase Agreement dated April 30, 1997 among           *
          Registrant, OWT, National Earth Products, Inc. ("NEP")
          and the selling stockholders of NEP, incorporated
          by reference from Exhibit 2.5 of the March 1997 10-Q.

3.1       Articles of Incorporation, as amended, incorporated by        *
          reference from Exhibit 3.1 of the Registrant's 
          Registration Statement on Form S-1 (File No. 
          33-16337) effective September 16, 1987 (the "Form S-1 
          Registration Statement").

3.2       Certificate of Amendment of Restated Articles of              *
          Incorporation as filed on May 24, 1988, incorporated 
          by reference from Exhibit 3.2 of the Annual Report on
          Form 10-K for the fiscal year ended December 31, 1988 
          (the "1988 10-K").

3.3       Certificate of Amendment of Restated Articles of              *
          Incorporation as filed on  June 4, 1991, incorporated 
          by reference from Exhibit 4.1 of the Quarterly Report
          on Form 10-Q for the fiscal quarter ended June 30, 
          1991 (the "June 1991 10-Q").

3.4       Bylaws, as amended, incorporated by reference from            *
          Exhibit 4.2 of the June 1991 10-Q.

                                       44


                                                                    Sequentially
Exhibit                                                               Numbered
Number                  INDEX TO EXHIBITS (Continued)                  Page
- --------------                                                      ------------
10.1       EMCON  1986   Incentive   Stock   Option   Plan              *(1)
           and   Amendment, incorporated by reference
           from Exhibit 10.15 of the Form S-1 Registration 
           Statement.

10.2       Form  of  Agreement   pursuant  to  Salary                   *(1)
           Continuation   Plan, incorporated by  reference 
           from Exhibit 10.17 of the Form S-1
           Registration Statement.

10.3       Schedule identifying Agreements pursuant to Salary         48*(1)
           Continuation Plan between Registrant and certain 
           employees, incorporated by reference from Exhibit
           10.3 of the March 1997 10-Q.

10.4       Form of Indemnity Agreement between the Registrant           *
           and each of the Registrant's officers and directors, 
           incorporated by reference from Exhibit 10.20 of the
           Registrant's Annual Report on Form 10-K for the fiscal 
           year ended December 31, 1988 (the "1988 10-K").

10.5       EMCON 1988 Stock Option Plan, amended by shareholder         *(1) 
           approval on May 25,1994,    including form of  
           Nonqualified  Stock Option Agreement  (Outside  
           Directors),  incorporated  by reference from
           Exhibit 10.9 of  Registrant's  Quarterly  Report 
           on Form 10-Q for the  fiscal  quarter  ended  
           June 30,  1994 (the  "June 30,  1994 10-Q").

10.6       EMCON Employee Stock Purchase Plan incorporated by           *(1)
           reference from Exhibit 10.10 of the Registrant's 
           Quarterly Report on Form 10-Q for the fiscal quarter
           ended June 30, 1995.

10.7       EMCON Restricted Stock Plan incorporated by reference        *(1)
           from Exhibit 10.15 of the Annual Report on Form 10-K 
           for the fiscal year ended December 31, 1990.

10.8       EMCON Deferred Compensation Plan effective January 1,        *(1)
            1994, incorporated by reference from Exhibit 10.12 
           of the Registrant's Annual Report on Form 10-K for
           the fiscal year ended December 31, 1993 (the "1993 10-K").

10.9       Trust  Agreement for the EMCON Deferred Compensation         *(1)
           Plan and Salary  Continuation Plan Trust dated  
           February 19, 1994, between  Registrant and Wells 
           Fargo Bank,  N.A.  incorporated  by reference from 
           Exhibit 10.13 of the 1993 10-K.

10.10      Agreement between Eugene M. Herson and Registrant            *(1)
           dated November 30, 1995, incorporated by reference 
           from Exhibit 10.21 of Registrant's Annual Report on
           Form 10-K for the fiscal year ended December 31, 1995 
           (the "1995 10-K").


                                       45




                                                                    Sequentially
Exhibit                                                               Numbered
Number               INDEX TO EXHIBITS (Continued)                     Page
- ---------                                                           ------------
10.12     Credit Agreement between The Bank of California, N.A.          *
          and Registrant dated February 29, 1996, incorporated
          by reference from Exhibit 10.2 of the March 1996 8-K.

10.13     Security Agreement between The Bank of California, N.A.        *
          and Registrant dated February 29, 1996, incorporated by 
          reference from Exhibit 10.3 of the  March 1996 8-K.

10.14     Pledge Agreement between The Bank of California, N.A.          *
          and Registrant dated February 29, 1996, incorporated 
          by reference from Exhibit 10.4 of the March 1996 8-K.

10.15     Eurodollar Rate Option Agreement between The Bank of           *
          California, N.A. and Registrant dated February 29, 
          1996, incorporated by reference from Exhibit 10.5
          of the March 1996 8-K.

10.16     Fixed Rate Amortization Option Agreement between The           *
          Bank of California, N.A. and Registrant dated February 
          29, 1996, incorporated by reference from Exhibit 10.6 
          of the March 1996 8-K.

10.17     Note Agreement among the Registrant, OWT, and certain          *
          employees of OWT, incorporated  by  reference  from 
          Exhibit 10.1 of the March 1996 8-K.

10.18     Rescission and Reformation Agreement dated effective           *
          November 1, 1996 among EMCON, OWT, and certain 
          employees of OWT, incorporated by reference from 
          Exhibit 10.18 of the 1996 10-K.

10.19     New Note Agreement dated effective November 1, 1996            *
          among EMCON, OWT and certain employees of OWT,  
          incorporated  by  reference from Exhibit 10.19 of 
          the 1996 10-K.

10.20     Second Amendment to Credit Agreement dated effective           *
          January 27, 1997 among EMCON and Union Bank of
          California, N.A. (formerly known as The Bank of
          California, N.A.), incorporated by reference from 
          Exhibit 10.21 of the 1996 10-K.

10.21     Third Amendment to Credit Agreement dated effective            *
          March 27, 1997 among EMCON and Union Bank of California, 
          N.A. (formerly known as The Bank of California,
          N.A.), incorporated by reference from Exhibit 10.23 
          of the 1996 10-K.

10.22     Convertible Notes dated April 30, 1997 issued by EMCON         *
          to Dennis Grimm and Charles Gearhart in the principal 
          amounts of $400,798.40 and $399,201.60, respectively, 
          incorporated by reference from Exhibit 10.22 of the 
          March 1997 10-Q.

                                       46




                                                                    Sequentially
Exhibit                                                               Numbered
Number                      INDEX TO EXHIBITS (Continued                Page
- --------------                                                      ------------

10.23     Lease Agreement dated April 4, 1997, between EMCON              *
          and Columbia Analytical Services, Inc., incorporated
          by reference from Exhibit 10.23 of the March 1997
          10-Q.

10.24     Amendment 1997-I to EMCON Deferred Compensation Plan            *(1)
          dated effective February 22, 1997, incorporated by 
          reference from Exhibit 10.24 of the Registrant's
          Quarterly Report on Form 10-Q for the fiscal quarter 
          ended June 30, 1997 (the "June 30, 1997 10-Q").

10.25     Fourth Amendment to Credit Agreement dated effective            *
          June 24, 1997 among EMCON and Union Bank of California, 
          N.A., incorporated by reference from Exhibit 10.25
          of the June 30, 1997 10-Q.

10.26     Amended and Restated Agreement between Eugene M.              49*
          Herson and Registrant dated November 3, 1997.

10.27     Amended and  Restated  Agreement  between R.                  56*
          Michael   Momboisse  and  Registrant   dated
          November 3, 1997.
 
10.28     Deferred Compensation Plan, Amended and Restated              63*
          effective January 1, 1998.  
             
 27       Financial Data Schedule, included herein.                     91

* Incorporated  by reference 
(1) Management contract or compensatory plan or arrangement required to be filed
as an exhibit to this form  pursuant to Item 14(c) of the  instructions  to Form
10-K.

                                       47