Results from environmental testing being conducted at Colonia High seeking to find a link to a mysterious brain tumor cluster among graduates and workers from the school are expected to be available by the end of May, according to a memo from Woodbridge superintendent Joseph Massimino and obtained by NJ Advance Media. While the probe continues, Massimino said there is “no discernible health or wellness threat to students, staff or visitors at Colonia High School and we will remain open.” The Woodbridge Municipal Council approved an emergency contract earlier this month with an environmental co…