When PEN will be $1 again, page-521

and this from the latest quarterly activity report

LANCE PROJECT – MU1A FIELD DEMONSTRATION• Field operations continue to run consistently with improvements across all key focus areas o Oxygen Reduction Potential level approximately 400 mv supporting higher uraniumproduction gradeso Recovery composite stream uranium grade at approximately 40 ppmo Rate of acid addition reduced to a rate sufficient to maintain current pH levelso Performance of ion exchange uranium recovery processes improved with theupward trending uranium concentration, achieving loading results that areconsistent with typical levels for low pH lixiviant applications• Continued evaluation of several alternative uranium capture/recovery process optionswhich may improve upon standard ion exchange performance

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why is it do you think that they are still continuing to evaluate several alternative recovery process options