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Technology Stocks : Geo2 Ltd. Green technologies -- Ignore unavailable to you. Want to Upgrade?

To: IngotWeTrust who wrote (30)	5/21/2000 4:44:00 PM
From: richard badauskas	Respond to of 70

I am attempting to find the answers to three points you raised earlier (1) How does the leach time of the sodium thiosulfate compare to cyanide. (2) In the GeoTech venture does "plastics" cover "fiberglass" in the extraction process. (3) What is the leachate in the Enviroclean process. As soon as I get an answer I will post. I will respond to your fresh posting tomorrow.

To: IngotWeTrust who wrote (30)	5/22/2000 1:24:00 PM
From: richard badauskas	Read Replies (1) \| Respond to of 70

I have been told that the relative speed of gold dissolution in thiosulfate and cyanide solutions depends on the conditions. However, gold dissolution rates at ambient temperatures are roughly equal. At elevated teperatures after fine milling, gold dissolution in thiosulfate can occur in a matter of minutes. Of course, dissolution in a heap leach is much slower than this as it depends on gold size and liberation. The next field test at Lian will be based on a 10 tonne sample size with a grade of approximately 10 g/t. If this test continues the success seen in the trial conducted late last year Geo2 will begin the small scale production of 4,000 tonnes at 10 g/t. The larger trial is the necessary first step in the conversion of the project into full scale production mode where it is envisaged that approximately 100,000 tonnes per annum at 4-5 g/t will be treated. I understand that there are several several hundred thousand tonnes of high grade oxide ore available. The ore is contained in a surface deposit which is very easy to mine. There are other small high grade deposits available in the Lian area. It is hoped that the production experience will allow the process to be further tweaked so that economic production from lower grade ores can take place. We must watch to see how the next test proceeds and then see if the first 100,000 tonnes of ore can be treated economically. Your next query relates to the recovery of fiberglass and plastic. The first project is aimed at the recycling of plastic in optical media, that is CD's which are made only of plastic. Geotech has developed a process to remove all the metal from a CD and preserve the plastic quality. I understand that there is a very high defect rate when CD's have audio/video burned onto them them during a mass production process (I understand that the same applies to DVD's). The process has been run at the 150 kg scale and a trial will soon take place on a 500 kg size. Proposed production is 100 tonnes per week. The proposed plan is to have the plant operating at 50 tonnes per week in November of this year. Understand that discussions for contracts are currently underway. Cannot comment about the value of those contracts, this will become known in due course. Recovery of metals from circuit boards will be the second phase of Geotech development. Understand that the focus will be the recovery of metals. You are right about the amount of fiberglass in a circuit board, but the emphasis will be on the metals. The enviroclean process uses sulfuric acid (not sodium thiosulfate). An alliance has been struck with Electrometals to utilize a new type of electrowinning technology. I will address Electrometals and this process in a new post tomorrow as it will probably be a little detailed. The process is now commercial and we are seeking to run trials in the USA with a JV partner. I will also post other links for more information tomorrow. Right now I am out of time and my phone is ringing.