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REP37449
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REP37449
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Entry Properties
Last modified
8/25/2016 12:16:18 AM
Creation date
11/27/2007 7:46:18 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981008
IBM Index Class Name
Report
Doc Date
2/5/1992
Doc Name
ANNUAL HYDROLOGY REPORT FOR THE 1991 WATER YEAR
From
GARY W WENDT
To
MLRD
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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parameters whose historic maximums were exceeded during 1991. Note [hat the September, <br />• 1991 sample was collected at a maximum historic discharge level, which agrees with <br />elevated water levels in the surrounding monitoring cells. Spoil Spring p2 did not <br />produce sufficient flow for collection of water quality samples during 1991. <br />Water Suitability <br />A discussion of the suitability of both the ground and surface water monitored at the <br />Nucla Mine was presented in Tab 7 of the 1988 Nucla PAP, and reviewed in the 1990 Nucla <br />Annual Hydrologic Report. The suitability of both ground and surface eater was assessed <br />using the most stringent recommended standards published by various agencies for domestic <br />eater, agriculture or irrigation, and livestock drinking eater. <br />In summary, the quality of water in all aquifers monitored was found to be unsuitable far <br />both drinking water end agricultural uses. Ground water in the vicinity of the Nucla Nine <br />was determined to be suitable for livestock drinking water, although only marginally so, <br />due to the relatively low yield of ell aquifers monitored. All surface water monitored <br />ues deemed suitable only for livestock drinking water, es was the spring water monitored <br />• at Spoil Spri n9 #1. <br />Using the list of parameters and associated limits for livestock drinking water (see Tab <br />7, Nucla PAP), a review of chemical analyses performed on sampL es collected at monitoring <br />wells (see Appendix E) and at surface water sites (see Appendix C) was made in order to <br />determine whether chose water sources found in the Nucla PAP and in [he 1990 Nucle ANR to <br />be suitable for livestock drinking Water remained suitable during [he 1991 water year. <br />Based on the review, the overburden (GW-N9), underbu rd en (Gw-N3), and spoils (Gw-N27) <br />aquifers were found to be chemically suitable for livestock drinking water during the 1991 <br />water year. The review also determined that water sampled at Spoils Spring tt1 remained <br />suitable for Livestock drinking cafe r. The Dakota coal aquifer (GW-NAR) Was found to <br />exceed livestock drinking water standards in the September, 1991 sample for the following <br />dissolved constituents: lead, magnesium, sulfate, and total dissolved solids (TDS). <br />Analysis for dissolved lead performed on this sample resulted in a value of 110 ug/l <br />which indicates a probable analytical error. Review of previous chemical data for well <br />GW-N4R shows [hat livestock drinking water standards for magnesium, su(fat e, and total <br />. dissolved solids have historically been exceeded in every sample collected. Although the <br />17 <br />
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