||Alaska placer mining metals study
||Environmental Protection Agency, Seattle, WA. Region X.
||United States Environmental Protection Agency, Region 10,
||PB98-145998 ; EPA 910-R-98-003
Placer mining ;
Environmental effects ;
Water quality ;
Metalliferous mineral deposits ;
Ore deposits ;
Mine wastes ;
Surface waters ;
Water smapling ;
Water chemistry ;
Dissolved solids ;
Suspended solids ;
Water temperature ;
Electric conductivity ;
pH factor ;
||Region 10 Library/Seattle,WA
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 v. (various pagings) : ill., maps ; 28 cm.
Thirty-one placer mine sites were visited by EPA and State personnel during August 1997 as the first phase of a study of the occurrence of metals in surface water above and below mines, and in effluent. Field measurements were made of temperature, pH, electrical conductivity and settleable solids. One-time grab samples were collected for laboratory analysis of total suspended, sediment, total recoverable metals, dissolved metals and hardness.
"April 10, 1998." "EPA 910-R-98-003"