2007-11-23_HYDROLOGY - M1977300 (7)

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Cotter Schwartzwalder Mine Hydrology Study All Analytes-- Surface Water Analytical Results Whetstone Associates Parameter 3/29107 6127107 915107 pH (Std. Units) ---------------- ----------------------- 8.06 ----------------------------------------------------------------------------------------------------------------------------------------- --------------- Conductivity, specific (uS/cm) --------------- 453 --------------------- -- - -_- - ---------------- ----------------------------_----------------------------------------------------------------------------------------- Totaldissolved solids(mg/L) 252 ------------------ ------------------------------ - ---------------------------------------------------------------------------------------------- Bicarbonate (mg/L) 142 -------------------------------------------------- Alkalinity, total (mg/L) ------- 119 -----------------------------------------------------------------------'------------------------------------------------------------------------------------------ Calcium, dissolved (mg/L) 48.9 -_- - --- - -------------------- - --- - ------------------- - -----'------------------------ - ----- - - ---------- - ---------- - ------------------------ - --------- Sodium, dissolved (mg/L) 18 -.2 ------------------------------------------------------------------------------------------------------------------------------------------------------ Potassium,dissolved(mg/L) --------------- ---------------------_ 3.3------------- -------------------------------------------------------------------------------------------------------------------------------------- Sulfate (mg/L) 68 ---------- ----------------------------------------------------------- Chloride(mg/L) ------------------32--------------------------------------------------------------------------------------------------------------------------------------- Aluminum, dissolved (mg/L) <0.2 ------------------------------------------------------------------------- ----------------------- Aluminum, total (mg/L) <0.2 Antimony, dissolved (mg/L) 0.001 --------------------------------------------------------------------------------------------------------------------------------------------- -- Antimony,total(mg/L) - ------------- -------------------------------------------- ---- ---------------------------------------------------------------------------------------------------------------- ----- Arsenic, total (mg/L) <0.1 ------------------------ Chromium, total (mg/L) Copper, dissolved (mg/L) ------------------- Copper,total(mg/L) - - - - - - - - -- - - - - - - <0.005 -------- - --------------------------------------------- - --'------------------------------------------------------------------- ----------------- Iron, dissolved (mg/L) <0.03 Iron, total (mg/L) ---------------- ------------------------ 0-.2 Ferrous (Fe2+) (mg/L) <0.03 ----------------------'--- ------------------------ Lead, total (mg/L) <0.005 ------------------ - ---------------------------- - - ------------------------------------------- - -- - ----------------------- - --- - ----------------- -------- ----- dissolved (mg/L) Magnesium, 14.9 -----------------------------------_--- ------------------------------------------------------------------ - - -------------------- - -- - ------- Manganese, dissolved ( mg/L) 0.02 Manganese,total( mg/L) ----------------------- 0.03---------_ Mercury, total (mg/L) <OA001 -------------------------- - --- ------------------------------------------- Molybdenum, dissolved (mg(L) 0.023 Silver, dissolved (mg/L) Silver, total (mg/L) <0.001 Thallium, dissolved (mg/L) ----------------- <0.00t ------------------------------------------------ ------------------------------------------------------------------------------------ ------------ Thalfium, total (mg/L) <0.5 Zinc, dissolved (mg/L) _--<70 ----------------------------------------------------------_-------------------------------------------------------------------------------- Zinc, total (mg/L) ----- ---- 0.008 --------_ _ ------ ------- ------------ Uranium,dissolved(pCi/L) 0.0081 0.145 0.031 Uranium, suspended (pCi/L) 0.0032 0.0005 Uranium, total (pCi/L) 0.0113 Radium-226, dissolved (pCi/L) <0.2 --------------- 0.7 <0.2 ------' ----------------- - ----------------_-- -- - ------------------------------------------------------------------------------------------- Radium-226, suspended (pCi/L) <0.2 --------------- 0.6 -------------------------------------------- - -------------------------------- --------------------------------------------------------------------------------------- Radium-226, total (pCVL) <0.2 Printed 11/ 7 5:28:36 AM age 8 of 74