REP06591

• Permit No: C1980003
• IBM Index Class Name: Report
• Doc Date: 2/12/1999
• Doc Name: 1998 ARR TABLE OF CONTENTS, EXHIBIT 1 THRU 3
• Permit Index Doc Type: ANNUAL RECLAMATION REPORT
• Media Type: D
• Archive: No

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5.0 SPRING AND SEEP MONITORING
• 5.1 REQUIREMENT
HGCC has committed to annually monitoring six spoil springs on the reclaimed azea between April 1
and May 15. These springs will be sampled for field water-quality parameters including pH,
condutiviry, temperature and estimate of flow. As pazt of the seep monitoring plan, springs with a
flow rate greater than 75 gallons per minute (gpm) will be anaiyted fora "full-suite" fist of 25
pazameters. If no flow exceeds 75 gpm, an annual full-suite analysis for the single largest spring will
be completed.
5.2 RESPONSE
Three mine site-wide spring and seep surveys were conduced during 1998. The first survey was
conducted on May 7, 1998 in conjunction with the semi-annual surface water monitoring even[. A
second survey was conducted on June 18, 1998 and the third survey was conducted June 23, 1998 in
conjunction with the Phase II/Phase III bond release application inspetion tour. Several of the
springs were also monitored opportunistically at other times of the year. Summaries of the field water
quality measurements and laboratory analyses of collected samples are presented in Exhibit 5, Spring
and Seep Monitoring Data.
Spoil Springs RSP-1, RSP-2, RSP-3 and RSP-4 were each monitored during the three springtime site-
wide surveys. Spring RSP-4 was sampled for laboratory analyses on May 7, 1998 and again on
November 24, 1998. Laboratory results of the RSP-4 samples indicate that all constituent
concentrations were within the range of previously reported values. Only Geld parameters were
recorded for the ocher seeps. 77te field data from the other seeps was also generally within previously
reported ranges.
RSP-1: Field measurements were recorded on May 7 and June 18. The pH values were within the
range of previously reported values. The May 7 condutiviry value of 3610 µs/cm was less
then any previously reported conductivity measurements. The June 18 conductivity value
was within the range of previously reported measurements. This seep was not monitored on
June 23.
RSP-2: Field measurements were recorded on May 7 and June 18. The pH and conductivity values
were within the range of previously reported values. Only conductivity was recorded on June
23 and the measured value was within the range of previously repotted values.
RSP-3: Field measurements were recorded on May 7, June 18, June 23 and November 24. The pH
and conduciviry values were within the range of previously reported values. Seepage flow
rates appeared similar to previous observations.
RSP-4: Field measurements were recorded on January 22, February 27, March 17, April 29, May 7,
June 18 and 23, and November 24. The pH and conduciviry values were within the range of
previously reported values with the exception of pH on March 17. The field pH value of
8.11 is the highest reported pH value. Samples were colleted on May 7 and November 24
for laboratory analyses in conjuntion with the semi-annual surface water samples. Resulu of
the laboratory analyses are included in Exhibit 4. A flow rate of 75 gpm was calculated on
May 7 by measuring flow in Hayden Gulch immediately upstream and downstream of the
seep discharge area. The November 24 flow rate of 18 gpm was also calculated by measuring
. flow in Hayden Gulch immediately upstream and downstream of the seep area.
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