Tumors going back decades. about half of them cancerous. health experts calling the rate concerning. environmental engineers are testing the grounds for radiation. here s zachary kiesch. reporter: tonight, questions surrounding this new jersey high school and a possible link to brain tumors. i want answers. i want to know that there is something or there is nothing there. reporter: al lupiano wondered if there is a possible connection after he, his wife, and his sister, all former students, were diagnosed with brain tumors. al s tumor discovered 20 years ago. his wife and sister receiving their diagnoses last august. angela died this year. i had recalled two family friends, the black sisters, had also passed of these brain tumors. that started setting off bells and whistles in my head. reporter: lupiano made a plea on facebook searching for anyone else in the area who had a similar experience. so far 105 former students and