ROY F. WESTON INC <WSTNA> 4TH QTR NET Shr 15 cts vs 11 cts Net 900,334 vs 482,705 Revs 28.7 mln vs 18.8 mln Avg shrs 6,195,527 vs 4,551,105 Shr 51 cts vs 31 cts Net 2,713,912 vs 1,402,696 Revs 98.7 mln vs 67.9 mln Avg shrs 5,369,833 vs 4,551,105 NOTE: Share adjusted for three-for-two stock split effecitive March 2, 1987. Weston said earnings for the firstg quarter will be about flat due to the recent substantial addition of management and technical staff and an expansion in the Southeastern and Northwestern U.S. The company said full-year earnings and revenues are expected to be higher. The company today reported 1986 earnings of 2,713,912 dlrs, up from 1,402,696 dlrs in 1985, and revenues of 98.7 mln dlrs, up from 67.9 mln dlrs. Weston earned 492,000 dlrs in last year's first quarter.