My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP09832
CWCB
>
Water Supply Protection
>
Backfile
>
9001-10000
>
WSP09832
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/26/2010 2:56:05 PM
Creation date
10/12/2006 3:58:07 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.114.J
Description
Dolores Participating Project
State
CO
Basin
San Juan/Dolores
Water Division
7
Date
8/1/1960
Author
USDOH Ed. & Welfare
Title
Stream Surveys in Vicinity of Uranium Mills - III. Area of Uravan-Slick Rock-and Gateway Colorado - August 1960
Water Supply Pro - Doc Type
Report/Study
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
37
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).
Show annotations
View images
View plain text
<br />- l3 - <br /> <br />Redcake tailing liquor and Plaut 5 overflow are quite acid as they <br />enter the San Miguel River, Two factors apparently combine to reduce the <br />effect of these acid streams on the river. One is dilution; the acid <br />streams were diluted 64:1 in the river on the average over the survey. <br />Barium carbonate or barium chloride was being added to the Plant 5 over- <br />flow during the survey. Unreacted barium salts which did not settle in <br />the tailings ponds may have helped neutralize some of the effluent acidity <br />as the various effluents were mixed with each other and water in the river. <br /> <br />River water both upstream and downstream from Uravan is very hard, <br />with typical concentrations ranging from 630 to 900 mg/l as CaC03' Water <br />of this hardness generally requires softening before industrial use. The <br />Uravan mill has a softening plant for boiler feed water. <br /> <br />Passing along the river from above Uravan to 1.6 miles below town, <br />there were three places where chemical measurements were made. One is <br />above town, the second may be visualized as the sum total of all chemical <br />discharges from the mill and the third is below town. With this considera- <br />tion in mind, one would expect that the measurement below Uravan would <br />reflect both of the other two. In terms of a weight of some specific <br />chemical, the weight measured passing a point upstream from Uravan plus <br />the weight of chemical added in all mill discharges would be equal to <br />the weight measured passing a point downstream from Uravan. <br /> <br />There are two very striking exceptions to the pattern just described. <br />Neither the iron nor the vanadium analyses of samples collected 1.6 miles <br />downstream from Uravan reflects directly the amounts of these chemicals in <br />solution upstream from town and added in the mill discharge. In the case <br />of iron, 1800 pounds/day were added to the river by the effluents and <br />ditch drainage from Uravan during cycle I. At the station 1.6 miles down- <br />stream from Uravan, l7 pounds/day of dissolved iron passed during cycle I, <br />while 15 pounds/day of dissolved iron discharged by the mill during cycle <br />II were not found in solution l.6 river miles below the mill. The largest <br />part of this iron is discharged in Plant 5 overflow. The red-brown color <br />of the river below Plant 5 pond effluent entry has been mentioned and is <br />probably due largely to formation of colloidal and floc particles of <br />hydrous ferric oxide. Some floc is formed in the ponds through which <br />Plant 5 overflow passes on its way to the river; floc particles probably <br />continue forming, growing and settling as the Plant 5 effluent mixes with <br />the river until nearly all of the iron has settled out or gone into sus- <br />pension by the time the river reaches the downstream sampling station. <br /> <br />In a similar manner, it was found that more vanadium was added <br />to the river than was reflected in dissolved vanadium analyses of samples <br />
The URL can be used to link to this page
Your browser does not support the video tag.