December 7, 2010
Michael Colomb, Site Vice President
320 Governor Hunt Rd
CC: Gregory Jaczko, NRC Chairman
Dear Mr. Colomb,
As Governor elect, the integrity of Vermont’s aquifer is of the highest concern to me. I respectfully request that Entergy return its extraction wells to service and repeat my earlier request to increase the number of wells to prevent tritiated water from entering Vermont’s precious and irreplaceable aquifers.
It appears that ENVY made the decision to arbitrarily terminate the process of extracting tritiated ground water from the Vermont Yankee site as soon as 300,000-gallons of water had been removed. The tritium concentration level of the remaining on site tritiated water after the 300,000-gallon cutoff was never provided to justify that decision.
On February 25, 2010, ENVY also made the decision to close its Construction Office Building (COB) well, which had been leaking tritiated water into the underlying aquifer. ENVY’s February press release stated that if the well continued to operate, there was a “small possibility” that its operation would draw tritium into the aquifer and cause “cross contamination”. Therefore, shutting down the COB well was an appropriate precaution to avoid contaminating the aquifer.
However, the October 8, 2010 hydrological COB well test results showed that the tritiated water had indeed contaminated the COB well even though it had been shut down seven months earlier. This October 2010 discovery suggests that the likelihood of cross contamination of the COB well water was more significant than ENVY engineers had estimated in February. The evidence shows that cross contamination of bedrock has apparently been occurring even after the COB well was shut down. At that time, I recommended that the extraction wells remain in operation and their number be increased to avoid contamination of our aquifer.
On October 13, 2010, Dr. William Irwin with the State Department of Health said, …the 300,000- gallon mark shouldn’t be an end point for the extraction process. He said cold weather is an impediment, but Entergy should continue to pump and store tritiated water through the winter. Irwin described the “extraction” wells as “critical.”… “(Entergy) should make an effort to continue the extraction as long as tritium is in the water,” Irwin said. (Vermont Digger)
Yet despite my suggestion and Dr. Irwin’s recommendation that the extraction wells remain operational, ENVY went ahead and on November 18, 2010 shut down these vital water safety devices.
The following day Entergy detected 500,000 pCi/l of tritium near the COB well and at bedrock. This high radioactive concentration near the COB well and at bedrock is a further indication that the aquifer may be in serious jeopardy of contamination from tritium and other radioactive isotopes.
Furthermore, I have been informed that since detecting tritium at a depth of 220 feet in the COB well in October, Entergy has not taken any radiation samples from the bedrock or aquifer via the COB well. The COB well is the only source of data about what is happening in the aquifer under the site, so I also respectfully request that additional samples be taken regularly to allow the State of Vermont and Entergy to ascertain if one of Vermont’s essential aquifers has been or is being contaminated by tritiated water from this newest expansion of the tritium plume. I also request that a formal schedule of testing of water, Connecticut River fish, and on-site vegetation be conducted for tritium, strontium and cesium.
None of these requests should take any extensive effort and I would anticipate that recommended actions could be completed by the end of the week. I would hope you would support these actions which I believe are in the public interest. I look forward to hearing from you and to a productive working relationship.