Last March 2008, an environmentalist researcher forwarded to us the following data:
From Mines and Geosciences Bureau V:
Total haul of Lafayette from 2005 to date (March 3, 2008):
Gold - 159.80 kg
Silver - 488.84 kg
Copper concentrate - 8,841.60 dry metric tons
Zinc concentrate - 17,148.50 dmt
Total excise tax paid - PhP 36,118,555.54
Using the following hedge prices cited in Lafayette's Interim Report dated --
Gold - $ 405.74
Silvwr - $ 5.87
Copper conc - $ 1817
Zinc conc - $ 946
The toal Lafayette income is estimated at US$ 32.355 million. The exchange rate went as high as PhP 51 to the
rate of PhP 40 to the
This implies that the excise tax is a measly 2.79%.
If we use average market prices of the metals between 2005 and 2007:
Gold - $ 550
Silver - $ 10
Copper conc - $ 5000
Zinc conc - $ 2500
The excise tax would then be a more measly 0.93%.
Let us estimate the waste produced by
Every ton of gold-silver ore has 2 grams of the precious metals.
The total mass of gold ans silver produced is 648.64 kilograms or 648,640 grams.
Therefore, the estimate of total waste from gold and silver production is 324,320 tons. This is a very conservative estimate again.
A cubic meter of solid waste is heavier than a cubic meter of water. It is safe to assume that a cubic meter of solid waste weighs more than a ton. Let us be conservative again by assuming that every cubic meter of solid waste weighs 3 tons.
This means that the 324,320 tons of
What about the liquid waste?
From http://en.wikipedia.org/wiki/Cyanide: "Low grade ores are stacked into heaps and sprayed with cyanide solution (concentration about one kilogram NaCN per ton)."
If there are 324,320 tons of solid waste, then 324,320 kilograms or 324,320 liters of water was used.
This is equal to 324 cubic meters. This is something like a pond 10 m x 10 m in floor area filled with water 3.24 meters high.
These are all conservative estimates I can quite confidently say.
I also obtained data from the Bureau of Internal Revenue on the top ten tax-paying corporations in the Bicol Region.
I wrote the Department of Labor and Employment to know if
If you think this next one is outdated, remember, this was forwarded in early March...
There is unpublicized report that Reynulfo Juan has been removed as DENR chief. One report says he was transferred to Region 3 (