James and Irene Blom, Lawrence, will celebrate their 40th wedding anniversary today with a private family dinner. James Blom and Irene Roberman were married Oct. 18, 1964, in Lawrence. Jim retired from Telecordia as a member of the technical staff. He is a master gardener. Irene retired from Middlesex High School, Middlesex, N.J., where she worked in library science. The couple's children are Jamie Blom, Hamilton, N.J., and Douglas Blom, Knoxville, Tenn. They have one grandchild.