GENERAL38945

• Permit No: M1990057
• IBM Index Class Name: General Documents
• Doc Date: 10/18/2001
• Doc Name: CHEMICAL STORES AT THE MILL LEADVILLE MINING AND MILLING PN M-1990-057
• From: DMG
• To: ERICA CROSBY
• Media Type: D
• Archive: No

• III IIIIIIIIIIIII III ~
STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Deparlmenl of Natural Resources
1313 Sherman SL, Room 215
Dem-er, Colorado 80?03
Phone: [phone]
FAX: [phone]
DATE: October 18, 2001
TO: Erica Crosby /
FROM: Allen Sorenson ~ `,
DIVISION OF
MINERALS
GEOLOGY
RECLAMATION
MINING•BAFETY
Bil I Owens
Governor
Greg E VValcher
EKeculivc Direrlur
Michael B. Long
Division Dneaor
RE: Chemical Stores at the Mil[, Leadville Mining and Milling, Pennit No. M-7990-057
The reagent inventory provided by the operator with a letter dated October I, 2001 demonstrates that there
are no particularly problematic hazardous chemicals stored at the mill. Included in this memo are some
facts about the chemicals onsite gleaned from material safety data sheets. Also included are some
recommendations for continued storage. If the reclamation costs for the mill are [o be recalculated, certain
recommendations for [he costs to properly dispose of these chemicals are also included.
Where ratings are included in the information on each chemical discussed below, the following rating scale
applies:
In each o}}our hazard categories:
Nwhb - The Ranger a toxiclry me substance presents
it hrhak*tl, Ingoslod. or ab5orbe0, h1cWd:'frg mo potonlial
elleG on Iwmarvanunal reprotluGlw prooessos.
Flammoblllly -The tontlency of me substance to burn.
t7oaetNNy -TTw potan11a10l me subslarlce to exploao
or read vlolonlly vAa1 afr, vraMr or oUror subslarxx±s.
Contact -The Ganger Ne substarrco plesonts vmwr
axposutl Io skin, apes. aril mucalu membranes.
Copper Sulfate:
Health Rating: 2 -Moderate
Flammability Rating: 0 -None
Reactivity Rating: 0 -None
Contact Rating: 2 -Moderate
Storage Considerations: Keep in a tightly closed container, stored in a coal, dry, ventilated area. Protect
against physical damage. Isolate from incompatible substances. Containers of this material may be
hazardous when empty since they retain product residues (dust, solids); observe all warnings and
precautions listed for the product.