Claimant asserts he developed peripheral neuropathy from exposure to toxic chemicals at work. Employer contends there is no evidence Claimant was exposed to chemicals at work that would cause peripheral neuropathy, and Claimant has other conditions which are known to cause the condition.
Claimant's favor in the temporary proceeding. To modify a temporary award, the ALJ in the final award must find there was "additional significant evidence" not before the ALJ at the temporary award. Jennings v. Station Casino St. Charles, 196 S.W.3d 552, 558 (Mo.App. 2006) (citations omitted). As discussed below, Employer has not met his burden of proof to modify the prior findings.
Claimant has the burden of proving all essential elements of a claim, including causation. Decker v. Square D Co., 974 S.W.2d 667, 670 (Mo.App. 1998). Claimant bears the burden of proving a direct causal relationship between the conditions of employment and the occupational disease. Id. Generally, a claimant's medical expert in an occupational disease case must establish within a "reasonable probability" that the disease was caused by conditions in the work place. Pippin v. St. Joe Minerals Corp., 799 S.W.2d 898, 902. (Mo.App. 1999) (citations omitted) (abrogated). Courts have defined probable to mean that which is founded in reason and experience and inclines the mind to believe, but leaves room for doubt. Id. In any event, the mere "possibility" that other factors could have contributed to cause the illness does not necessarily defeat a claim based on occupational disease. Sheehan v. Springfield Seed \& Floral, Inc., 733 S.W.2d 795, 797 (Mo. App. 1987).
I find Claimant's testimony credible that he was exposed to chemical products during his thirty-three year career with Employer. Furthermore, MSDS reflect of these products.
I find the opinions of Drs. Peeples, Sultan, Martinez, and Volarich more credible than the opinions of Drs. Heutel, Long, and Parent. Dr. Peeples found a connection between Benzene, Trimethylbenzene and hydrocarbons, and development of demyelinating peripheral neuropathy, despite the absence of this side effect being listed on MSDS. Dr. Peeples testified not all side effects were listed on MSDS. Dr. Sultan, found four times the average amount of Trimethylbenzene in Claimant's bloodstream and opined it can cause peripheral neuropathy. Trimethylbenzene was found in at least three of the chemicals Claimant testified he used frequently for a number of years. Dr. Martinez found Claimant's exposure to chemicals at work was a significant factor which caused peripheral neuropathy, based on Benzene being an ingredient of Trimethylbenzene and the elimination of other causative factors. Benzene is known to cause peripheral neuropathy, according to Dr. Martinez.
Dr. Volarich concluded Trimethylbenzene did not cause peripheral neuropathy, but found Xylene, Toluene, Hexane, Dyna-Clean, and halogenated hydrocarbons do cause the condition. MSDS and expert testimony establish Claimant used these chemicals as well.
I find Employer presented no additional significant evidence regarding causation at the second hearing. Dr. Heutel is not a toxicologist; he failed the exam three times to become board certified in toxicology, and remained uncertified when deposed. Dr. Heutel is not board certified in neurology, and did not examine Claimant. I find Dr. Heutel's opinion is not credible that no connection exists between use of Trimethylbenzene, Toluene and Xylene, and the development of peripheral neuropathy.
I find Dr. Long's testimony is not credible. Dr. Long, Employer's first toxicologist, initially found support for Dr. Peeple's causation opinion, and refused to say the chemicals did not cause peripheral neuropathy. Later during deposition, Dr. Long did not remember reaching that conclusion in a letter sent to Employer's former counsel eight years ago. Dr. Long's recent opinion that there is no evidence Claimant was exposed to Benzene, Xylene, Toluene or Trimethylbenzene at work is not credible. Nor is his opinion credible that chemical exposure affects the central nervous system, not peripheral nerves.
I find Dr. Parent's opinion is not credible that it was necessary to know the amount of chemical exposure to link the medical condition to symptoms. According to Dr. Martinez, not all ingredients are listed in industrial strength chemicals; therefore, it is not possible to know the amount of exposure a person has over a thirty-three year period.
Furthermore, Drs. Peeples, Sultan, Pearlman, and Volarich ruled out heredity, diabetes, thyroid, B-12 deficiency, and autoimmune conditions as the source of Claimant's neuropathy.
Based on credible testimony by Claimant, expert opinions of Drs. Peeples, Sultan, Martinez, and Volarich, medical records, reports, and MSDS, I find Claimant was exposed to chemicals at work including Prestige Step 1, Dyna Clean, Emerald JRZ, ARS-F, Feboclean Yellow, and Feboclean Blue.
Based on credible testimony of Claimant, Drs. Peeples, Sultan, Martinez, and Volarich, medical records and reports, I find the development of peripheral neuropathy was medically causally related to prolonged chemical exposure at work. I find Claimant met his burden to establish he sustained an occupational disease which arose out of and in the course of his employment with Employer.