"Q" sand

"O" sand

Leaching period

Oct. 1981–Nov. 1984

Aug. 1984–Jan. 1991

Restoration period

Nov. 1984–May 1986

–

Restoration certified

Aug. 1987

–

Pilot flow rate

378 l/m (100 gpm)

568 l/m (150 gpm)

5-Spot pattern size

30 m x 30 m (100 ft x 100 ft)

36 m x 36 m (120 ft x 120 ft)

Ore depth

152 m (500 ft)

230 m (750 ft)

In-place reserves (U₃O₈)

61 200 kg (135 000 lbs)

103 500 kg (228 000 lbs)

Production

35 400 kg (78 000 lbs)

96 600 kg (213 000 lbs)

Recovery

58%

93%

Fluid processed

Pore volume

11 700 m³

45 800 m³

Pore volume — production

42

45

Pore volume — restoration

20

–

Days/pore volume

22

56