Fixed Air Sampling Program

Through the week of Monday, May 08, 2006, operational monitoring results for gross alpha and beta emitting radionuclides are consistent with the baseline results.

Through the week of Thursday, June 01, 2006, operational monitoring results for gamma emitting radionuclides are consistent with the baseline results.

Through the week of Thursday, June 08, 2006, operational monitoring results for elemental constituents are consistent with the baseline results.

Through the 2^nd Quarter 2004, operational monitoring results for actinide quarterly composites are consistent with the baseline results.

Based on these data, there is no evidence that radioactive or elemental constituents have been released to the environment, since WIPP began receipt of radioactive waste on March 26, 1999. The first shipment of mixed radioactive and hazardous waste was received by WIPP on September 9, 2000.