PERMFILE118984

• Permit No: M1999069
• IBM Index Class Name: Permit File
• Doc Date: 8/30/1999
• Doc Name: REVIEW PASTE PH TEST JAKE KAUFMANN & SON INC WAGNER KAUFMANN PIT NO 3 M-99-069
• From: DMG
• To: ERICA CROSBY
• Media Type: D
• Archive: No

~ ~ III IIIIIIIIIIIIIIII
STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1373 Sherman St., Rootn 215
Denver, Colorado 80203
Phone: [phone]
FA%: [phone]
Date: August 30, 1999
To: Erica Crosby
From: Harry Posey>~~ .
Subject: Review: Paste pH test; Jake aufmann & Son, Inc.;
M-99-069
D I~ISION OF
MINERALS
GEOLOGY
RECLAMATION
MI NING•SAFETY
B~II Owens
Governor
Geg E. Walther
Executive Director
Michael B. long
Division Dirertor
Wagner/Kaufmann Pit No. 3;
The captioned operation seeks to place what is called "lime" waste in existing and proposed open
gravel cuts. The "lime" waste occurs extensively on the property and is a byproduct of a former
beet sugar operation which operated in the azea. Whether the "lime" might cause environmental
problems when excavated and deposited below the local water table was of concern to the
Division. Lime should yield a very high pH in water. To evaluate the situation further, I visited
the operation with you on August 6.
After reviewing the operations and considering the apparent chemical procedures related to beet
sugar processing, it appears that what is locally called "lime" waste is actually calcium carbonate
(CaC03) or powdered limestone, rather than lime (Ca0) or hydrated lime. Limestone, which
was trucked to the property, was slaked on site and lime and carbon dioxide were recovered for
processing. The lime was then re-carbonated and disposed of as limestone. What appears as
layers and beds of white material discharged from the sugar beet processing is evidently CaCO,.
While on site, I collected a sample of the limestone beet waste and gave it to Pam Acre of Tuttle
Applegate. This sample yielded a paste pH of 7.8. A value of this sort is consistent with a paste
pH of limestone from this area and climate.
Thus, it appears that pH will not be an issue with the waste limestone backfill. Groundwater
monitoring does not appear to be necessary for this site.
cc: Cazl Mount (e-mail)
Jim Pendleton (e-mail)