Laserfiche WebLink
. • . ~ + Al <br />STANDARD METALS CORPORATION <br />Mr. Don Simpson, Permits and Enforcement <br />Water Quality Control Division <br />Colorado Department of Health <br />4210 East Eleventh Avenue <br />Denver, Colorado 80220 <br />Dear Don: <br />P.O. Box 247 <br />Silverton, Colorado 81433 <br />(303) 387 -5533 <br />X <br />July 20, 1983 <br />Re: Tailings Pond No. 4 Seepage <br />Control Plans <br />As suggested during our recent telephone conversation, I am submitting the <br />following information detailing the status of seepage control plans de- <br />veloped for Tailings Pond No. 4. <br />Seepage control plans developed for Tailings Pond No. 4 and submitted in <br />February 1983 proposed the following actions: <br />1. Installation of water quality and phreatic monitoring <br />wells in the tailing pond embankment to determine seepage <br />water quality. <br />2. Modification of tailings depositional methods to increase <br />the interior pond beach area and move ponded water away <br />from embankment. <br />3. Installation of a bentonite seal at the northeast tailings <br />embankment - roadbed abutment. <br />4. Installation of a gravity drain and sump collection system <br />at the toe of the pond embankment to capture and retain <br />seepage waters if the above procedures failed to eliminate <br />visible seepage occurring at the embankment toe. <br />Water quality monitoring wells have been installed around the embankment <br />perimeter; however, adequate data has not been obtained to date to ascertain <br />seepage water quality and subsequent impact to adjacent surface and ground <br />water systems. Seepage quality data will be submitted as soon as sufficient <br />data is obtained, which is anticipated by August 31. <br />