Cheryl Andrea et al., Respondents, v. E.I. du Pont de Nemours & Co. et al., Defendants, and Arnone, Hedin, Casker, Kennedy and Drake Architects and Landscape Architects, P. C. (Habiterra Associates), et al., Appellants. (Action No. 1.); Shirley Dietz, Individually and as Parent and Natural Guardian of Scott Frost, et al., Respondents, v. Jamestown Public Schools et al., Appellants, et al., Defendants. (Action No. 2.); Elden J. Francisco et al., Individually and as Parents and Natural Guardians of Christy Francisco, et al., Respondents, v. Jamestown Public Schools et al., Appellants, et al., Defendants. (Action No. 3.); Karen Seekings, Individually and as Parent and Natural Guardian of Christina Terry, Respondent, v. Jamestown City School District et al., Defendants, and Nichter Construction Co., Inc., et al., Appellants. (Action No. 4.)