COMMITTEE TO SAVE OUR ENVIRONMENT, FRANK H. BISCHOFF, LILLIAN BISCHOFF, JANET I. ZANDER, FRANK N. HOSTERT, MARY A. BEAVER, LASALLE NATIONAL BANK, AS TRUSTEE UNDER TRUST AGREEMENT DATED MARCH 15, 1963, AND KNOWN AS TRUST NO. 30789, ROBERT C. HEMPLE, DORIS A. HEMPLE, BRUCE NELSON, RALPH L. AGATE, M. ERIC GARDINER, KAREN GARDINER, B. JOHN ROOTH, FANSA ROOTH, JOHN O’DONNELL, DANIEL O’DONNELL, ROBERT J. RUSNAK, and PATRICIA RUSNAK v. HARRY A. CARLSON and DONALD F. KREGER, d/b/a SOUTH SUBURBAN LAND DEVELOPMENT CO., and the ENVIRONMENTAL PROTECTION AGENCY OF THE STATE OF ILLINOIS