Clean Harbors Announces Second Quarter Results.

BRAINTREE, Mass.--(BUSINESS WIRE)--July 23, 1997--Clean Harbors Inc. (NASDAQ:CLHB) today announced its results for the second quarter ended June 30, 1997.

Revenues for the second quarter were $47,363,000 with a net loss of $(883,000) or $(.10) loss per common and common equivalent share, as compared to revenues of $49,638,000 with a net loss of $(2,605,000) or $(.28) per common and common equivalent share for the second quarter of last year.

Six-month revenues were $87,737,000 with a net loss of $ $(2,866,000) or $(.31) loss per common and common equivalent share as compared to revenues of $95,374,000 with a net loss of $(4,247,000) or $(.47) per common and common equivalent share for the comparable six month period last year.

Alan S. McKim, chairman & CEO and David A. Eckert, president & COO said in a joint statement: "The figures we are announcing today encourage us that the significant losses of the past two difficult years have been stabilized. While we remain disappointed that industry conditions have led us to report any loss at all, we are able to report that our cost reduction efforts, improved system efficiencies, and enhanced marketing programs have provided us with our best operating results in 8 quarters. We have reduced our quarterly loss by nearly two-thirds compared to the same period last year. More important, the trend we see is very positive and leads us to believe that our overall efforts at a turnaround are beginning to show strong results."

McKim and Eckert went on to say: "We are continuing our efforts to reduce costs in all areas. We believe that our systems and the efficiencies we have gained will allow us to consistently set the standard for customer service in our industry."

Clean Harbors Inc. provides a wide range of industrial waste management services and environmental clean-up services to a diversified customer base across the nation. The Company currently has service and sales offices in 24 states and Puerto Rico, and operates 12 waste management facilities throughout the country. -0-

                            Clean Harbors Inc.
                    Consolidated Statements of Income
                               Unaudited
                  (in thousands, except per share data)

                             Three Months ended    Six months ended
                                  June 30,              June 30,
                               1997      1996       1997        1996

Revenues                     $47,363   $49,638   $ 87,737   $ 95,374
Cost of revenues              34,885    38,936     66,373     73,818
Selling, general and
 administrative expenses       8,631     9,306     16,830     18,480
Depreciation and amortization  2,346     2,489      4,709      5,016
Income (loss) from operations  1,501    (1,093)      (175)    (1,940)
Other income (net)              --        --          800        --
Interest expense (net)         2,314     2,369      4,573      4,508
Loss before provision for
 income taxes                   (813)   (3,462)    (3,948)    (6,448)
Provision (benefit) from income
 taxes                            70      (857)    (1,082)    (2,201)
    Net loss                  $ (883) $ (2,605)  $ (2,866)  $ (4,247)
Loss per common and common
 equivalent share              $(.10)    $(.28)     $(.31)     $(.47)
Weighted average common and
 common equivalent shares
 outstanding (000's)           9,911     9,624       9,866     9,592

CONTACT: Clean Harbors Inc.

David A. Eckert

617-849-1800, ext. 4240