HYDRO20858

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 7/12/1988
• Doc Name: WATER SAMPLES - REFUSE PILE - POWDERHORN
• From: MLRD
• To: TOM GILLIS
• Permit Index Doc Type: DMG SAMPLING
• Media Type: D
• Archive: No

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STATE OF COLORADO
Roy Romer, Govei
DEPARTMENT OF NATURAL RESOURCES
MINED LAND RECLAMATION DIVISION
FRED R. BANTA, Director
DATE: July 12, 1988
T0: Tom Gillis
FROM: David Berry~~
RE: Water Samples - Refuse Pile - Powderhorn
I have reviewed the water quality data for the samples collected during our
May 24, 1988 inspection of the Powderhorn site. Some of the data are compiled
in the attached table for general comparison to applicable water quality
standards. The standards apply to irrigation waters and they are derived from
either the Division's material damage paper or from standards published by the
National Academy of Sciences (1974);
Please note that some of the analysis results are not directly comparable to
the standards because the standards are usually expressed as the total
recoverable amount and many of the analysis numbers are for disso ve
amounts. The dissolved component of a constituent in a camp el-1s usually much
less than the total recoverable component. Also, because pile water will
probably not be used to directly irrigate a reclamation stand, it is not
possible to predict impacts of the pile water on the vegetation based solely
on this data. The contaminants may be concentrated in or washed away from the
effective root zone, depending upon the depth of topsoil, total precipitation,
(soil moisture/soil hydrology regime), etc. Some of the sample parameters are
not reflected in the table because apparently no applicable standard exists.
The following constituents are present at levels higher than the respective
irrigation standard:
electrical conductivity;
total dissolved solids;
alkalinity;
boron;
manganese; and
molybdenum.
We can examine the issue in more detail if it becomes necessary. Let me know
if you have any questions.
cc: Mike Savage
215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203.2273 Tel. [phone]