Clean Harbors Announces Second Quarter Earnings.

BRAINTREE, Mass.--(BUSINESS WIRE)--July 22, 1999--

Clean Harbors, Inc. (NASDAQ:CLHB) today announced its results for the second quarter and first half ended June 30, 1999.

Revenues for the second quarter were $51,118,000 with net income of $705,000 or $0.06 per basic and diluted share, as compared to revenues of $53,591,000 with net income of $776,000 or $0.06 per basic and diluted share for the same quarter of last year.

First half revenues were $95,766,000 with a net loss of $(2,137,000) or $(0.22) per basic and diluted share as compared to revenues of $93,967,000 with a net loss of $(2,803,000) or $(0.30) per basic and diluted share for the same period last year.

Alan S. McKim, Chairman and Chief Executive Officer said: "Our financial results continue to demonstrate that our ongoing cost control and profitability measures continue to be effective and allowed us to report a profit of $705,000 for the quarter despite lower revenues than those reported for the same quarter last year. We are also encouraged that for the first 6 months of 1999 compared to the prior year, we have reduced the net loss by $666,000 while improving EBITDA by $540,000."

Clean Harbors Inc., is a national environmental services corporation providing a wide range of industrial waste management services and environmental clean-up services to a diversified customer base including 300 of the Fortune 500 companies and numerous Federal and State government agencies across the United States.

The Company currently has service and sales offices located in 22 states and operates 12 waste management facilities strategically located throughout the country. -0-

                          CLEAN HARBORS, INC
                 CONSOLIDATED STATEMENTS OF OPERATIONS
                               Unaudited
                 (in thousands, except per share data)

                             Three Months Ended     Six Months Ended
                                  June 30,              June 30,
                               1999       1998       1999      1998
Revenues                     $51,118    $53,591    $95,766   $93,967
Cost of revenues              37,215     38,975     70,907    70,319
Selling, general
 and administrative
 expenses                      8,635      9,180     17,748    17,077
Depreciation and
 amortization                  2,273      2,252      4,639     4,536
Income from
 operations                    2,995      3,184      2,472     2,035
Interest expense,
 net                           2,200      2,318      4,429     4,658
Income (loss) before
 provision for
 income taxes                    795        866     (1,957)   (2,623)
Provision for
 income taxes                     90         90        180       180
  Net income (loss)             $705       $776    $(2,137)  $(2,803)
Diluted earnings (loss)
 per share                     $0.06      $0.06     $(0.22)   $(0.30)
Weighted average common
 shares outstanding plus
 potentially dilutive common
 shares                       10,515     10,385     10,563    10,229
Financial data:
Earnings before interest,
 income taxes, depreciation
 and amortization (EBITDA)    $5,268     $5,436     $7,111    $6,571