My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
1998-09-21_REVISION - M1977378
DRMS
>
Day Forward
>
Revision
>
Minerals
>
M1977378
>
1998-09-21_REVISION - M1977378
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
3/12/2021 6:17:20 AM
Creation date
8/23/2012 10:37:56 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977378
IBM Index Class Name
Revision
Doc Date
9/21/1998
Doc Name
Permit Certification Modification
From
CDPHE-WQCD
To
Sunnyside Gold Corp
Type & Sequence
TR21
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
30
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
Attachment"rP4SDM <br /> Page No.TP4SDM - 3 <br /> Permit No. CO-0044768 <br /> Site Loading Estimate <br /> The site loading estimate for this project Nvas based on visual observations and weighing potential <br /> impact based on assumptions and observations using data extrapolations from tests on similar <br /> material. <br /> —Observations and Assumptions <br /> • Surface drainage from approximately 16 acres has been observed to runoff and collect along <br /> the toe of Tailings Pond No. 4 to percolate into the groundwater system or evaporate. <br /> • It is assumed that if oxygenated surface water percolates and contacts tailings material, <br /> dissoh ed metals will be picked up by the migrating water. <br /> —Nlethodolog,, for Estimation of Potential Loading <br /> • The contributing watershed area for the drainage project was measured to be approximately <br /> 16 acres It \Nas assumed that the average annual precipitation on this area would be similar <br /> to the m erage at the Silverton weather station which is nearby. It was also assumed that 60 <br /> percent of this precipitation reported as run-off to the toe of Tailings Pond No. 4 for <br /> evaporation or infiltration with a 90 percent infiltration rate with potential for contact with <br /> tailings material. <br /> • Loading was calculated based on 1:1 leach test results from similar material. Dilution was <br /> assumed at 10-1 because it is probable that at least some of the infiltrating surface runoff <br /> passes directly through tailings material with contact being less diluted (by a factor of 2) <br /> than the 20:1 dilution used for TCLP testing. <br /> —Estimation of Dissolved Zinc Loading Potential <br /> • Based on the above methodology for estimation, it is estimated that the potential exists for <br /> an annuali.ed daily loading of 12 pounds of dissolved zinc. <br /> SG Is under no obligation to defend these estimates and they should only be used as an <br /> estimate using any assumptions to obtain. SGC does not represent that its mitigation <br /> project at this si mte will remove any specific percentage of metals loading from this site: the <br /> loading estimate contained herein does not form the basis for an enforceable permit <br /> obligation <br />
The URL can be used to link to this page
Your browser does not support the video tag.