Laserfiche WebLink
<br />U.S. Bureau of Mines' test holes was also determined to be in a suitable location to monitor <br />the amount and quality of the ground water below the tailings impoundment area. <br />Ground water monitoring operations will follow a quarterly chronological sequence for <br />~ the life of the milling project unless it can be demonstrated that potential ground water <br />contaminants are not migrating downgradient from the tailings impoundment area. A sample <br />of mill tailings will be analyzed and the results will be submitted to the Mined Land <br />Reclamation Division as soon as milling operations commence. If the type of flotation <br />reagents aze changed during the life of the project, additional mill tailings water samp]es will <br />be analyzed and the results forwarded to the Mined Land Reclamation Division for comparison <br />with the water samples taken from the monitoring wells. <br />Colina Oro Molino, Inc. will sample these three wells for the following parameters: <br />field parameters of water level, pH, temperature, total dissolved solids; and laboratory <br />parameters of sulfate, iron, copper, lead, zinc, silver, mercury, azsenic, cadmium, and pine <br />oil. <br />The U.S. Bureau of Mines test well located closest to the Cash mine access road was <br />selected for the purpose of monitoring the ground water level and chemistry of the water that <br />will be stored in the Hazel A mine adit. Colina Oro Molino, Inc. will sample this monitoring <br />well on a quarterly basis for the following pazameters: field parameters of water level, pH, <br />temperature, and total dissolved solids; and laboratory parameters of sulfate, iron, copper, <br />lead, zinc, silver, mercury, arsenic, cadmium, and pine oil. <br />The water monitoring samples will be reported on a total dissolved basis, and will <br />include the suspended material contained in the sample. Standard sampling procedures will be <br />followed in accordance with the instructions of the receiving analytical laboratory in order to <br />obtain proper quality control of the water samples. Colina Oro Molino, Inc. will also collect <br />duplicate samples which will be sent to separate laboratories for comparative analysis from at <br />least one monitoring well each year during milling operations. <br />3 <br />