THE CHEMTURA DNAPL PICTURE UNFOLDS

The blanks are slowly being filled in as I complete the Tables for six different compounds over a twenty-three year time span with seventeen different monitoring wells. Benzothiazole is one of the lower concentration compounds but it is astoundingly counterbalanced by Toluene whose concentrations are repeatedly in the 100,000 to 200,000 ppb. area over several wells.

The depth, breadth and length of the strings of concentrations over the years are awesome. I have essentially finished three of the chemicals with the middle years still being done on three others. While concentration reductions can be seen in some wells, others go up and down with irregularity. The majority of concentrations of Toluene, Chlorobenzene, Carboxin and Mercaptobenzothiazole are well above 1% of their solubility in a litre of pure water. In this chemical cocktail masking as groundwater their effective solubilities are much lower. Keep in mind that at the moment I am only focusing on six chemicals in seventeen wells. I would estimate that there are results indicating between twelve and thirty different chemical compounds in each well depending on proximity to the discharge into the pit.