EXHIBIT 99.4

EMCON
PRO FORMA CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
(Unaudited)


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

                                                              Three months ended March 31, 1996
                                           -------------------------------------------------------------------------
                                                                       Pro Forma                  Pro Forma
                                                 EMCON         OWT    Adjustments               Consolidated
(In thousands, except share amounts)           (Unaudited) (Unaudited) (Unaudited)               (Unaudited)
- --------------------------------------------------------------------------------------------------------------------
                                                                                          
Gross revenue ................................   $ 26,889    $  4,574    $   --                    $ 31,463
Outside services, at cost ....................      3,957        --          --                       3,957
                                                 --------    --------    --------                  --------

         Net revenue .........................     22,932       4,574        --                      27,506

Costs and expenses:
     Direct expenses .........................      8,544       3,385        --                      11,929
     Indirect expenses .......................     14,459       1,181          66          (1)       15,706
                                                 --------    --------    --------                  --------

         Income (loss) from
         operations ..........................        (71)          8         (66)                     (129)

Interest income (expense), net ...............          3         (79)       (186)     (2,3,4)         (262)

Equity in loss of affiliates .................        (41)         (2)       --                         (43)
                                                 --------    --------    --------                   --------

Loss before benefit for income taxes .........       (109)        (73)       (252)                     (434)

Benefit for income taxes .....................        (38)        (39)        (75)         (5)         (152)
                                                 --------    --------    --------                   --------

Net loss .....................................   $    (71)   $    (34)   $   (177)                 $   (282)
                                                 ========    ========    ========                   ========

Loss per share ...............................                                                     $  (0.03)
                                                                                                    ========




See accompanying notes to pro forma consolidated condensed financial statements.




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EMCON
PRO FORMA CONSOLIDATED CONDENSED STATEMENTS OF INCOME
(Unaudited)


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

                                                                  Twelve months ended December 31, 1995
                                              ----------------------------------------------------------------------------

                                                                             Pro Forma                         Pro Forma
                                                     EMCON         OWT      Adjustments                      Consolidated
 (In thousands, except share amounts)              (Audited)    (Audited)   (Unaudited)                      (Unaudited)
 -------------------------------------------------------------------------------------------------------------------------
                                                                                                   
Gross revenue ..........................          $ 122,542    $  17,519    $    --                             140,061
Outside services, at cost ..............             19,133         --           --                              19,133
                                                  ---------    ---------    ---------                         ---------

         Net revenue ...................            103,409       17,519         --                            120,928

Costs and expenses:
     Direct expenses ...................             39,473       13,590         --                             53,063
     Indirect expenses .................             61,481        2,199        408              (1)            64,088
                                                  ---------    ---------    ---------                        ---------

         Income from operations ........              2,455       1,730        (408)                             3,777

Interest income (expense), net .........                188        (349)     (1,032)         (2,3,4)            (1,193)

Equity in loss of affiliates ...........                (74)        (39)        --                                (113)
                                                  ---------    ---------    ---------                         ---------

Income before provision for income taxes              2,569       1,342      (1,440)                             2,471

Provision for income taxes .............                783         567        (485)             (5)               865
                                                  ---------    ---------    ---------                         ---------

Net income .............................          $   1,786   $     775   $    (955)                         $   1,606
                                                  =========    =========    =========                         =========

Income per share .......................                                                                     $    0.20
                                                                                                              =========



See  accompanying   notes  to  pro  forma   consolidated   condensed   financial
statements..







                                       31



EMCON
NOTES TO PRO FORMA CONSOLIDATED CONDENSED FINANCIAL STATEMENTS
(Unaudited)
- --------------------------------------------------------------------------------

The  pro  forma  consolidated   statements  of   operations/income   assume  the
acquisition  took place as of the  beginning of each period  presented.  The pro
forma statements of operations/income  for the three months ended March 31, 1996
and twelve months ended  December 31, 1995 reflect the  combination of the EMCON
and Organic  Waste  Technologies,  Inc.,  and  Subsidiaries  ("OWT")  historical
consolidated financial statements of income/operations for those periods.

This pro forma  financial  information  should be read in  conjunction  with the
accompanying notes and historical audited  consolidated  financial statements of
the  Registrant  included  in its  Annual  Report  on Form  10-K for year  ended
December 31, 1995, the historical audited  consolidated  financial statements of
OWT and the unaudited  condensed  consolidated  statement of operations  for the
three  months  ended  March  31,  1996  included   herein,   and  the  unaudited
consolidated  financial  statements of the Registrant  included in its Quarterly
Report on Form 10-Q for the three  months  ended March 31,  1996.  The pro forma
adjustments  are  based on  currently  available  information;  however,  actual
adjustments  will be based on management's  further  evaluation and estimates of
fair values.  It is expected that certain of the actual  adjustments will differ
from the pro forma adjustments contained herein.

The above pro forma  results do not  purport to  reflect  the actual  results of
operations  had the Company  actually  acquired  OWT as of the  beginning of the
periods presented.



                                                                                 Three months ended       Twelve months ended
                       Statements of Operations                                    March 31, 1996          December 31, 1995
                       ------------------------                                  --------------          -----------------
                            (in thousands)
                                                                                                           
(1)     Represents amortization expense of
        purchased intangibles ................................................       $  66                    $ 408

(2)     To recognize interest expense on a
        $10,000,000 bank note, incurred in ...................................         128                      684
        conjunction with the acquisition of OWT

(3)     To recognize interest income lost due to
        use of cash in the purchase of OWT ...................................          34                      204

(4)     To reflect interest expense on notes
        payable to certain OWT officers ......................................          24                      144

(5)     To reflect income tax benefits due to
        the above pro forma adjustments ......................................         (75)                    (485)






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