|
Technical Revision to
<br />Henderson Mine Permit Ido. 77-342
<br />Page 4
<br />8. Page 6-6,~first paragraph, original permit, change,
<br />"Vegetation is analyzed for F, Mo and Cu every third yeas- in
<br />conjunction with chemical analyses of soils (discussed later)",
<br />to read, "Vegetation will be analyzed periodically for F, Mo
<br />and Cu in conjunction with chemical analysis of soils
<br />(discussed later)."
<br />Discussion: Chemical analyses of vegetation were
<br />performed during 1976 and 1979 and it appeared that, as
<br />with IR photography, a longer interval was warranted.
<br />9. Page 6-12, original permit, change the third sentence
<br />under Soils Monitoring which states, "Soil samples from
<br />selected locations surrounding the mill and tailing area (with
<br />a control) will continue to be collected (Figure 6-3) every
<br />third year and analyzed for pH, conductivity, organic matter,
<br />Pd03, P, K, A1, Fe, Mn, Cu, F, As, Cd, Pb, Mo, and CN." to read,
<br />"Soil samples from selected locations surrounding the mill and
<br />tailing area (with a control) will be collected (Figure 6-3) as
<br />necessary and analyzed for pH, conductivity, organic matter,
<br />NO , P, K, A1, Fe, Mn, Cu, F, As, Cd, Pb, Mo, and CN." In
<br />ad~ition, delete the fifth sentence which states, "If
<br />significant differences are not evident after five samplings
<br />(15 years), the sampling frequency might be reduced."
<br />Discussion: As with the vegetation monitoring, baseline
<br />data were collected in 1976 and a follow-up study was
<br />conducted in 1979 after three years of production. ,gain,
<br />comparison of the two samplings produced no overall
<br />significant differences and it was felt that a three-year
<br />sampling cycle was too frequent. We do not expect tl~e
<br />tailing to affect the soils or the vegetation of the
<br />surrounding area. The Climax Mine has been in operation
<br />for approximately 65 years and no observable detrimental
<br />effects are evident on the vegetation surrounding thfa
<br />Climax tailing ponds.
<br />10. Page 6-29, original permit, the first sentence at thc~ top
<br />of the page states, "Large mammals are monitored semiannu~illy
<br />in the Williams Fork Valley by Dr. Fred Glover." Please change
<br />to read, "Large mammal utilization of the general area
<br />surrounding the mill is monitored periodically."
<br />Discussion: As with other aspects of the environment:, we
<br />do not wish to commit to a rigid monitoring schedule, nor
<br />do we wish to commit to a specific consultant in
<br />perpetuity. Weather permitting, we have performed
<br />semiannual large mammal monitoring near the mill since
<br />1974, but did not originally intend that the statement on
<br />monitoring frequency be construed as a commitment. Nye
<br />
|