Officials from the Pennsylvania Department of Environmental Protection are spending the week looking for metals, arsenic and other harmful chemicals.
Last year, the Reading Eagle reported more than a dozen residents younger than 30 were diagnosed with cancer. All but one reportedly attended the high school.
Lawsuits have been filed by several cancer victims, mostly male athletes.
Muhlenberg High School graduate Michelle Sabatucci says she underwent three surgeries herself before conquering a malignant melanoma last year.
Test results are expected in August, just before students return for the new school year.
