April 11, 2001

1,4-Dioxane Found in Deepest Aquifer (Continued)

The belated discovery and confirmation of 1,4-dioxane in the deepest aquifer at the Pall-Gelman contamination site raises a number of questions about the scope and effectiveness of the company's cleanup activities:

-Why is deep E aquifer contaminated so far from the core?

-What is the contamination of the E aquifer at the core & elsewhere?

-Why is so little monitoring is being done at that depth at all areas on the site?

-Why did the DEQ allow the company to suspend monitoring of certain wells in the E aquifer?

-Where is the contamination in the E aquifer coming from and why isn't the purging stopping it?

-Is similar leaching from one level to another going on from the shallow aquifers and soil layers to the C3 and D2 aquifers?

-Why aren't some of the shallow aquifer wells being monitored?

-Why are concentrations going up in all 4 current core purge wells?

-Why are there so few monitoring wells in the core area between the wells with the highest concentrations?

-What if the assumptions used in their groundwater model are wrong?

-Why does it take so long for new well data and monitoring data to be made public?

1,4-Dioxane Pollutes Ann Arbor Municipal Supply Well

(more on this in the next installment!)