Testing the leaching solution once or twice a day is adequate. Monitoring the difference in gold content between rich and poor solutions indicates the adsorption by the activated carbon; a significant difference suggests effective adsorption. The leaching solution should be tested diligently, with tests conducted 1-2 times daily for pH, reagent concentration, and gold-silver content. […]

In theory, the solution can be circulated indefinitely. However, in special cases where harmful substances are present in the ore, it is advisable to replace the solution regularly.

The water usage for pit leaching is approximately 1:10 with the ore, while for heap leaching, it depends on the actual situation. Consumption mainly consists of daily evaporation and rainfall. Excess recovered water can be stored in reserve ponds.

 Uniform spraying of the leaching solution and continuous monitoring are used for assessment. The heap is also usually overturned in the later stages to ensure uniform leaching.

Spraying should be frequent, but intermittent, and not continuous. It should not be done continuously.