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ent~ei- ~ <br />July 17, 2006 <br />Russ Means <br />Colorado Division of Reclamation, Mining, and Safety <br />Grand Junction Field Office <br />101 S. Third St, Room 301 <br />Grand Junction, Colorado 81501 <br />~~n <br />RECEIVED <br />JUN 1. ~ 206 '~ <br />GRAND JUNCTION FIELD OFFICE <br />DIVISION OF <br />RF,CMMATION MINING & SAFETY <br />t/ <br />RB: Permit No. M-1978-116, SM-18 Mine, Lysimeter Sampling in Accord with Non- <br />DMO Determination <br />Mr. Means: <br />Attached is information pertaining to the soil moisture sampler (lysimeter) installed at <br />Cotter Corporation's SM-18 mine. <br />The lysimeter was installed in December 2006. It is located just northwest of the mine <br />waste pile at the SM-18 mine, the site agreed upon in a field meeting with Division of <br />Reclamation, Mining, and Safety (DAMS) personnel- A map showing the location of <br />the lysimeter is included as Figure 1. <br />Following the installation of the lysimeter attempts to collect samples were begun on a <br />regulaz basis. To date there has been no success in collecting any water samples from <br />this lysimeter. On two separate occasions a couple of drops of water collected on the end <br />of the lysimeter tubing, but not enough water has been collected to sample. A <br />spreadsheet showing the dates of sampling and the results of those sampling efforts is <br />also included as Table I. <br />In summazy to date there has been no leachate showing up in the lysimeter located <br />adjacent to the SM-18 mine waste dump. Consequently T feel that the ultra conservative <br />appzoach that has been taken by Cotter Corporation shows that there is minimal potential <br />for contamination of the lower groundwater in this azea. <br />If you have further questions regarding these issues, please call meat Cotter's Nucla <br />office, 970-864-7347. <br />Respectfully, <br />~~ ~~~ <br />Glen Williams <br />Manager of Mining <br />Cotter Corporation <br />dmoSM-IA - 1 - <br />CotferCorporation • West Slope Operations <br />P.O. Box 700, 25151 DD Road, Nucla, CO 81424 USA <br />RECrI~`~~ <br />JUN 'L5 2007 <br />Division of Reclamation, <br />Mining and Safety <br />Telephone (9701 864-7347 <br />FaX 197 01 864-7 287 <br />60/L0 39dd tY~~IIN dJO~ 213110C L9LLC980L6 t£~tt L00L/9T/90 <br />