 But, in 1994, samples of the riverbed taken next to the former chemical plant site revealed that it was still 4% DDT.A local task force pressured the EPA into cleaning up the adjacent waterway, an effort that was still ongoing in 2017, 70 years after Dr. Robinson had published his warning.He was a member of the Baptist church, a Knight Templar, a 32nd degree Scottish Rite Mason, a Knight of Pythias, an Odd Fellow, and a post commander of the American Legion.