Crews complete tricky operation at 560-sq-mile legacy site in Washington state to expedite removal of long stored wastes in leak-prone tanks, while regulators agree, despite concerns, to integrate limited grouting and offsite disposal .
Crews complete tricky operation at 560-sq-mile legacy site in Washington state to expedite removal of long stored wastes in leak-prone tanks, while regulators agree, despite concerns, to integrate limited grouting and offsite disposal .