View Document Here - Hanford Site

J. L. Westcott
Page 3
June 1, 1992
10. Sand Blast Grit
WHC-SD-W100-TI-003 Rev. 0
CPE-WOG-002
The grit is expected to be at least 90% grit, the balance being a
mixture of basin salt, sludge, dirt and sand, and liner material. This
is not expected to be designated hazardous from the contents, but if
designated it would probably be by association.
11. C-018 LETF Facility ( Stabilized Distillate Residue)
Ammonium Sulfate (in dry form) > 95%
Volatile Radionuclides - Trace levels
12. C-018 LETF Facility
Spent ion exchange resin
13. C-045 LETF Facility (300 Area Process Sewer Treatment)
Ferric Hydroxide Sludge ( on Occasion)
14. C-045 LETF Facility
Spent ion exchange resin (Duolite) - on Occasion
15. LLMW Incineration or Destruction Facility
Ash Residue
RECDMMEnDATIUnS
_The-foll3wing recommended methods will made and the appropriate waste forms
tested in the laboratory:
A. Cement is recommended and will be tested on the basin wastes numbered 1
through 10. Slag cement appears from the literature search to provide
the best waste product performance in regards to leachability and EPA
toxicity testing. Therefore, it is the prime candidate; however,
portland cement type I-II, or type III will be used as back-up if any
of the basin mixes appear to yield a poor product with slag cement. In
addition, a cement modifier suggested by E. W. McDaniel of ORNL will be
obtained and tested for its ability to increase retention of salt
materials such as nitrates.
B. Gypsum cement is recommended for ammonium sulfate listed as waste
no. 11. Slag and portland cements exhibit strongly basic slurries in
the mixing stage, this would release ammonia gas. Gypsum cement
however is neutral during mixing and stabilizes the ammonium sulfate in
the ammonium ion form. Laboratory screening experiments will be used
to determine whether plaster of paris or a modified gypsum cement is
used. Gypsum cement can be handled in the same type equipment as slag
cement if the set is retarded. Either a slow setting material or a
retarder will be added to provide a reasonable set time.
D-21