Aroclor 1242 Case Study

5. In his expert report, Dr. Rodricks faults NCR for not assuming that Aroclor 1242 posed a risk comparable to the higher chlorinated Aroclors. An examination of the state of science in the late 1960s and early 1970s refutes this view. At that time, the scientific community believed that increased chlorination was associated with increased toxicity. Further, early toxicity studies and occupational threshold limit values supported this conclusion. NCR should not have been expected to conclude that Aroclor 1242 was in the environment because higher chlorinated compounds had been found in ecological samples, nor that its toxicity was equivalent to those of higher chlorinated compounds.