Aroclor 1242: A Case Study
My understanding is that all parties knew, or at least could have learned about PCBs in CCP and broke paper destined for recycle. NCR did not keep their use of Aroclor 1242 a secret: for example, this fact was published in the form of patents. Recycling paper mills were aware that CCP and broke paper needed de-inking before they could be re-sold as recycled paper. What is important is not whether NCR or the mills knew PCBs were being released to the River through that process but rather implications of the releases. At the time there were no PCB discharge regulations and no information that would lead to a concern for health impacts. Unfortunately, wastewater discharge of many substances to rivers and streams was common practice by industry
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Kittrell above and in many instances in his report many instances loosely describes NCRs knowledge that “PCBs” were “toxic”. Routinely both Dr. Rodricks and Dr. Kittrell lump all Aroclors under the one term, PCBs, when the focus in this matter should be on Aroclor 1242 and its differential toxicity and the evolving scientific information available over time for this product. Although there were well-known hazards associated with some PCBs in occupational settings, NCR’s investigations of possible toxicity of its CCP containing Aroclor 1242 (the Hill Top studies) had shown low to negligible toxicity, especially at lower concentrations. As described in my earlier reports, NCR had no scientifically credible reason to conclude that the potential toxicity of CCP and its components would likely result in risks at environmental levels of exposure.
Similarly, when stating that NCR knew that PCBs were “stable”, this relative term is generally true for some PCBs in many applications but not necessarily in environmental settings. In my earlier reports, I describe how from the time Jensen presented his findings through the 1960s and into the early 1970s, numerous researchers collected and analyzed environmental samples – they identified higher chlorinated Aroclors (or European equivalent higher chlorinated commercial PCB mixtures), not the lower chlorinated mixtures as were used by
Kittrell above and in many instances in his report many instances loosely describes NCRs knowledge that “PCBs” were “toxic”. Routinely both Dr. Rodricks and Dr. Kittrell lump all Aroclors under the one term, PCBs, when the focus in this matter should be on Aroclor 1242 and its differential toxicity and the evolving scientific information available over time for this product. Although there were well-known hazards associated with some PCBs in occupational settings, NCR’s investigations of possible toxicity of its CCP containing Aroclor 1242 (the Hill Top studies) had shown low to negligible toxicity, especially at lower concentrations. As described in my earlier reports, NCR had no scientifically credible reason to conclude that the potential toxicity of CCP and its components would likely result in risks at environmental levels of exposure.
Similarly, when stating that NCR knew that PCBs were “stable”, this relative term is generally true for some PCBs in many applications but not necessarily in environmental settings. In my earlier reports, I describe how from the time Jensen presented his findings through the 1960s and into the early 1970s, numerous researchers collected and analyzed environmental samples – they identified higher chlorinated Aroclors (or European equivalent higher chlorinated commercial PCB mixtures), not the lower chlorinated mixtures as were used by