It allegedly took GHD a year from sampling groundwater to releasing their modest 34 page report titled "Bench Scale Study for Biodegradation of Chlorobenzene and NDAMA". Actually from when the project was first proposed to TRAC (Sept. 2024) it took two years although of course our beloved and besmirched MECP had to take a look at it first. What shocked me the most was the somewhat belated 37 YEARS that it took GHD or the MECP to advise citizens that chlorobenzene degrades so rapidly in shallow soils and at ground surface. I knew that it would volatolize (evaporate sort of) in the air as so many solvents do but it was only a week ago that I understood why chlorobenzene had allegedly never been found on the Varnicolor Chemical site in their Surficial Aquifer (SA) wells. It was not as I've long suspected that the Ontario Ministry of Environment actually fudged the results either by switching samples or by ordering their labs to improperly mark the results as Non Detect. It was due to the very rapid degradation of chlorobenzene by shallow soil bacteria in a well oxygenated (aerated) environment. This by the way is unusual and we were long told by Uniroyal/Crompton/Chemtura/CRA that chlorinated solvents do not degrade well by soil bacteria due to the tight chlorine bond combined with chlorine being a known bactericide (antiseptic if you will) Now as we all know here in Elmira chlorobenzene has persisted for a very long time in our deeper aquifers and continues to do so well in excess of the Ontario Drinking Water Standards (ODWS).
There likely is something else going on however as this study also claims on page 8 that chlorobenzene degrades under anaerobic (low oxygen) conditions. Indeed their Figures section seems to confirm that. If chlorobenzene degrades naturally on its own then why has nearly thirty years of pumping and treating not done the job? The answer is simple and this Susan Bryant is for you. It's called DNAPLS as I and Rich Clausi told Sylvia Berg and the APTE co-ordinators in January 1994. Esther Thur, one of the three founders of APTE (Sandra Bray, Susan RUPERT, Esther Thur), knew the truth when she heard it but the others unfortunately relied on Sylvia. Chlorobenzene DNAPLS both on and off the former Uniroyal Chemical site are doing what DNAPLS do which is slowly dissolve into groundwater at greater than the ODWS and will continue to do so likely for decades and maybe much longer.
This past Monday and Tuesday (Aug. 31 & Sept. 1/26) I informed this Blog's readers plus about sixty other authorities (MECP, TRAC, Lanxess, Woolwich Twn., RMOW etc.) and citizens that chlorobenzene rapidly degraded in shallow soils. Lo and behold TWO DAYS LATER (last evening) I get the e-mail report from GHD explaining attempts to enhance degradation of NDMA and chlorobenzene combined with the data all citizens should have had decades ago about chlorobenzenes rapid natural degradation. Coincidence? If so an absolutely amazing one.
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