1 EXHIBIT 11 2 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 Six Months Ended June 30, June 30, -------------------------- ------------------------- 1997 1996 1997 1996 --------- --------- --------- -------- PRIMARY: Average shares outstanding 27,141 26,772 27,092 26,729 Net effect of dilutive stock options and warrants-- based on the treasury stock method -- (1) 58 -- (1) 28 --------- --------- --------- --------- Total 27,141 26,830 27,092 26,757 ========= ========= ========= ========= Net income (loss) $ (31,609) $ 2,379 $ (30,171) $ 3,709 ========= ========= ========= ========= Per share amount $ (1.16) $ 0.09 $ (1.11) $ 0.14 ========= ========= ========= ========= FULLY DILUTED: Average shares outstanding 27,141 26,772 27,092 27,729 Net effect of dilutive stock options and warrants-- based on the treasury stock method -- (1) 58 (2) -- (1) 28 (2) --------- --------- --------- --------- Total 27,141 26,830 27,092 27,757 ========= ========= ========= ========= Net income (loss) $ (31,609) $ 2,379 $ (30,171) $ 3,709 ========= ========= ========= ========= Per share amount $ (1.16) $ 0.09 $ (1.11) $ 0.14 ========= ========= ========= ========= (1) Primary and fully diluted earnings per share computations for the three and six months ended June 30, 1997 do not give effect to stock options and warrants since their inclusion would have the effect of decreasing the net loss per share. (2) Fully dilutive effect of stock options and warrants on per share amounts for the three and six months ended June 30, 1996, has not been presented in the statement of operations since any reduction of less than 3% in the aggregate need not be considered as dilution.