1 EXHIBIT 11 Statement Re Computation of Per Share Earnings OHM CORPORATION COMPUTATION OF PER SHARE EARNINGS (In Thousands, Except Per Share Data) Three Months Ended Nine Months Ended September 30, September 30, ------------------ ------------------ 1996 1995 1996 1995 ------- ------- ------- ------- PRIMARY: Average Shares Outstanding 26,862 26,557 26,774 20,819 Net effect of dilutive stock options and warrants-- based on the treasury stock method -- 507 13 307 ------- ------- ------- ------- Total 26,862 27,064 26,787 21,126 ------- ======= ======= ======= Net Income $ 3,996 $ 3,187 $ 7,705 $ 4,708 ======= ======= ======= ======= Per Share Amount $ 0.15 $ 0.12 $ 0.29 $ 0.22 ======= ======= ======= ======= FULLY DILUTED: (1) Average Shares Outstanding 26,862 26,557 27,774 20,819 Net effect of dilutive stock options and warrants-- based on the treasury stock method 38 507 38 307 ------- ------- ------- ------- Total 26,900 27,064 26,812 21,126 ======= ======= ======= ======= Net Income $ 3,996 $ 3,187 $ 7,705 $ 4,708 ======= ======= ======= ======= Per Share Amount $ 0.15 $ 0.12 $ 0.29 $ 0.22 ======= ======= ======= ======= <FN> (1) Fully dilutive effect of stock options and warrants on per share amounts for the three and nine months ended September 30, 1996 and 1995, has not been presented in the statement of income since any reduction of less than 3% in the aggregate need not be considered as dilution.