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, ----------------- ----------------- 1995 1994 1995 1994 ---- ---- ---- ---- PRIMARY: Average Shares Outstanding 26,557 15,597 20,819 15,572 Net effect of dilutive stock options and warrants -- based on the treasury stock method 507 448 307 604 ------ ------ ------ ------ Total 27,064 16,045 21,126 16,176 ====== ====== ====== ====== Net Income $3,187 $2,615 $4,708 $5,489 ====== ====== ====== ====== Per Share Amount $ 0.12 $ 0.16 $ 0.22 $ 0.34 ====== ====== ====== ====== FULLY DILUTED:(1) Average Shares Outstanding 26,557 15,597 20,819 15,572 Net effect of dilutive stock options and warrants -- based on the treasury stock method 507 448 307 604 ------ ------ ------ ------ Total 27,064 16,045 21,126 16,176 ====== ====== ====== ====== Net Income $3,187 $2,615 $4,708 $5,489 ====== ====== ====== ====== Per Share Amount $ 0.12 $ 0.16 $ 0.22 $ 0.34 ====== ====== ====== ====== (1) Fully dilutive effect of stock options and warrants on per share amounts for the three and nine months ended September 30, 1995 and 1994, 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.