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U.S. Department of Energy
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Lysimeter study on the disposal of Paraho retorted oil shale. Final report, July 1975-July 1978

Technical Report ·
OSTI ID:5143108
This study used lysimeters to develop both a low-elevation (dry site) and a high-elevation (moist site) disposal scheme for Paraho (direct-heated) retorted shale. The objectives were to investigate: (1) vegetative stabilization of the surface of Paraho retorted shale and retorted shale covered with various soil depths; and (2) water and salt movement through both uncompacted and compacted Paraho retorted shale. The lysimeters were constructed in western Colorado in 1976 and filled in March 1977. Only a sparse vegetation cover (5% to 15) was established on retorted shale following fertilization, mulching, and irrigation. In contrast, adequate plant cover (55% to 85%) was established on the soil cover over retorted shale and on soil control treatment areas. Water balance calculations and drainage below the compacted zone indicated that water had moved into and through the compacted zone in the leached treatment areas. Further study is needed on the permeability of the compacted shale.
Research Organization:
Colorado State Univ., Fort Collins (USA). Dept. of Agronomy
OSTI ID:
5143108
Report Number(s):
PB-80-102924
Country of Publication:
United States
Language:
English