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                                   EXHIBIT 15


                   Letter  Re Unaudited Financial Information


Board of Directors and Stockholders
OHM Corporation

We are aware of the incorporation by reference into the Registration Statements
(Form S-8 No. 33-24953 and Form S-8 No. 33-28025) of OHM Corporation of our
report dated May 4, 1995, relating to the unaudited consolidated interim
financial statements of OHM Corporation which are included in its Form 10-Q for
the quarter ended March 31, 1995.

Pursuant to Rule 436(c) of the Securities Act of 1933, our report is not a part
of the registration statement prepared or certified by accountants within the
meaning of Section 7 or 11 of the Securities Act of 1933.



                                                              Ernst & Young  LLP

Columbus, Ohio
May 4, 1995