Waste Rock Storage Area Seepage Survey, Ekati Diamond Mine (BHP Billiton, November 1999)

BHP Diamonds Inc. 1999 Waste Rock Area Seepage Survey "Book #10" — transmittal November 17 1999 to Gordon Wray, Chairman, NWT Water Board. Same survey as "#13 1999" with additional appendix material: Appendix A Test Methodologies (ETL EnviroTest sub-contracted labs in Edmonton, Calgary, Saskatoon, Thunder Bay, Winnipeg, Grande Prairie; analytical methods for Beryllium, Boron, Cadmium, Calcium, Chromium, Cobalt, Copper, Iron, Sulphate by Ion Chromatography), and weekly leachate test results from February-October 1995 (pH, acidity/alkalinity as CaCO3, conductivity, sulphate SO4) on the Panda waste rock pile draining to Beartooth Lake, with pH-below-6.0 trigger threshold for seepage controls.