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4 • • <br />leachate. However, the leachate was not analyzed for Cu and Zn. <br />Please supply the Cu and Zn numbers for the leachate. <br />The Humidity Cell test results for the head sample indicate with <br />the low acidity, low sulfate and near neutral pH numbers that acid <br />generation is unlikely. However, there are not. metals analyses of <br />the leachates included. This data will be important in determining <br />if any of the metals of concern are generated by surface leaching <br />conditions. <br />The Division is not particularly concerned about the barium levels <br />in the the head sample. <br />Composite Tails Sample <br />Only a portion of the whole rock data was supplied for the Cross <br />Mine composite tails sample. The results, not surprisingly, look <br />very similar to the head sample. The Division looks forward to <br />obtaining the bulk of the geochemical data on this sample. Perhaps <br />the Division comments on the head sample could be taken into <br />account when directing the lab on the information required for the <br />tails sample. <br />Please contact me if you should have any questions regarding this <br />preliminary review. I do feel a meeting with you to discuss the <br />current testing and results would be a good idea. <br />Sinc ely, <br />1 <br />William C. Y rk- eirn <br />Environmental Protection Specialist <br />cc: John Henderson, Vranesh and Raisch, LLC <br />C:\wp51\Cross.geo <br />