PERMFILE46723

• Permit No: M1988112
• IBM Index Class Name: Permit File
• Doc Date: 11/8/1988
• Section_Exhibit Name: APPENDIX Q ADEQUACY REVIEW QUESTIONS AND RESPONSES
• Media Type: D
• Archive: No

82. Please submit analysis of the pond solution qu ality following batch
experimentation involving sulfuric acid addition such that this method
of pH adjustment may be eva luated. These analyses will require Division
review prior to a decision being made regarding the final handling of
pond solutions.
' Response: All pond solutions will be trucked to the new heap leach
facilities. Section E.3.4 of the permit application has been
' revised to include
facilities. transfer of the solution to the new heap
Exhibit E, Section E.4.3 revised 2/15/89.

EXHIBIT G -WATER INFORMATIOM
Section G.2 Surface Water
Section G.2.1 Site Description
83. The interpretation is made on page G-73 and G-50 th at no measurable
1 gains or losses in streamflow occur through the mining property. A
comparison of Tables G.2-2 and G.2-3 indicate there to be predominantly
Tosses of varying magnitude occurring along the reach. The data
indicate on the occasions of a gain that the amounts are generally of
' lesser magnitude. Please evaluate and discuss.
' Response: The Rito Seco does not experience measurable gains or losses
through the mining property. The data presented in Tables G.2-2
and G.2-3 were based on two different types of flow measurements,
theoretical stage-discharge measurements and instantaneous flow
measurements using a current meter. Using the more reliable
instantaneous flow data, tfie gains and losses experienced are
within allowable reading error for the instruments and no
measurable gains or losses are occurring.
The theuretical stage-discharge relationship was developed to
estimate daily stream flows. Because a theoretical rating curve
used in conjunction with a rated cross-section is not a primary
device, these flow values can be judged as estimates only and not
precise flow measurements.
f The evaluation of relative gains and losses in the stream was not
based upon these theoretical stage-discharge relationships, but
rather was booed upon instantaneous discharge measurements made
by the use of a current meter.
Exhibit G, Section G.2.2 revised 2/15/89.
' 84. No statement is made concerning the probable hydrologic impacts to
surface water due to the mining operations. Although the continuing
surface water monitoring program is designed to denote any changes,
please discuss whether any changes in streamflow, water quality or
sediment loading are expected during the mining and reclamation phases
of the operation.