Donald Christ, Individually and as Special Administrators of the Estate of Gail P. Christ, Deceased, Jacqueline Radosevich, Individually and as Special Administrator of the Estate of Gary Radosevich, Deceased, Mary Jane Beaulieu, Individually and as Special Administrator of the Estate of William Beaulieu, Deceased, Paul Clark, Individually and as Special Administrator of the Estate of Sharon A. Clark, Deceased, Betty Grosvold, Individually and as Special Administrator of the Estate of Victor M. Grosvold, Deceased, Dianne Pederson, Individually and as Special Administrator of the Estate of Mae H. Heath, Deceased, Carrie Duss, Individually and as Special Administrator of the Estate of Mary Henneman, Deceased and Arlene Christ, Plaintiffs-Appellants-Cross-Respondents, Deborah Sherwood, Individually and as Special Administrator of the Estate of Gerald F. Conley, Deceased, Randy S. Hermundson, Individually, Darlene Insteness, Individually and as Special Administrator of the Estate of Robert A. Insteness, Deceased, Joyce Jensen, Individually, Jean M. Leskinen, Individually,, Paul T. Manny, Anita Manny, Douglas Winrich, Individually and as Special Administrator of the Estate of Barbara Winrich, Deceased, Barbara Nelson, Individually and as Special Administrator of the Estate of Terry Nelson, Deceased, Faye Reiter, Individually, Donald Schindler, Individually and Jean Ruf, Individually and as Special Administrator of the Estate of Richard R. Ruf, Deceased, Plaintiffs,
v.
Exxon Mobil Corporation, Sunoco, Inc., Texaco Downstream Properties, Inc., Four Star Oil and Gas Company, BP Products North America, Inc. and Ashland Chemical Company Division of Ashland, Inc., Defendants-Respondents-Cross-Appellants-Petitioners, Shell Chemical, L.P., Cornerstone Natural Gas Company and Shell Oil Company, Defendants