REP24228

• Permit No: C1981044
• IBM Index Class Name: Report
• Doc Date: 3/30/1984
• Doc Name: ANNUAL HYDROLOGIC REPORT text
• From: EMPIRE ENERGY CORP
• To: MLRD
• Permit Index Doc Type: HYDROLOGY REPORT 1983
• Media Type: D
• Archive: No

-6-
No detectable water quality change is noted with time for water
from the Twentymile Sandstone (Tables 10 and 11). The water is
predominantly Ca - HC03 in chemical type with a mean TDS
concentration of 371 mg/L over the period of record (Table 10).
hen pH is 7.76 with a range from 1.0 to 8.41 (Table 10). Minor
constituents and trace elements are all low and within acceptable
limits for most uses.
1.2.4 White Sandstone
Three wells completed in the White Sandstone (Wells 81-03a, 81-04a,
81-19) were sampled for water quality parameters during 1983. A
summary of 14 field parameter samples collected during 1983 is
given in Table 5. A summary of the 1983 full suite analyses is
presented in Table 13 and a cumulative summary of water quality
data is presented in Table 12.
Again, little change in water quality over time is noted for the
White Sandstone (Tables 12 and 13). The water is Na-HC03 in
prevalent chemical type with a mean TDS concentration of 859 mg/L
and range from 265 to 1260 mg/L for the period of record from 9/81
to 6/83 (Table 12). The pH of water from this unit is somewhat
higher than other ground water sources with a mean value of 9.05
and a range from 8.13 to 11.09 (Table 12). Several trace elements
(aluminum, boron, fluoride) are somewhat higher than other bedrock
ground water sources.
1.2.5 Williams Fork Alluvium
Monitoring occurred at six wells completed in the Williams Fork
alluvium within the permit area. In September of 1983, monitoring
was reduced to three of these wells (Wells AVF-3, AVF-5 and
AVF-6). Monitoring of these wells for field parameters occurred
monthly and full site water quality analyses were performed
quarterly. A summary of the 1983 field parameters from the
Williams Fork alluvial wells is shown in Table 19. A summary of
the 1983 full suite water quality analyses is presented in Table 21
and a cumulative summary of water quality data since 6/81 is
presented in Table 20.
No significant changes in overall water quality are detectable over
the period of record for water from the Williams Fork alluvium
(Tables 20 and 21). Water from the Williams Fork alluvium is of
poorer quality than that from bedrock sources in the mine area.
Mean TDS concentration of Williams Fork alluvial wells is 1042 mg/L
with a range from 605 to 1890 mg/L (Table 20). The prevalent
chemical character of the water is Na-HC03 type. Concentrations