1993-09-24_REVISION - M1977378

• Permit No: M1977378
• IBM Index Class Name: REVISION
• Doc Date: 9/24/1993
• Doc Name: Adequancy Items
• From: Sunnyside Gold Corp
• To: DMG
• Type & Sequence: TR14
• Media Type: D
• Archive: No

Responses to Division Concerns
Page 7
The time available where meaningful information can be
gathered due to snow cover , saturated ground conditions and
sheet runoff from snowmelt is limited to approximately the
third quarter of the year (mid-July through September) .
Additional flow and metals data exists from SGC sampling
records and the CDH Upper Animas River Study (1991 - 1992)
that can also be used to evaluate main-stem creeks and a few
of the inventoried adits. This data will be included in the
initial water survey inventory report.
SGC requests that the Poughkeepsie Gulch area be dropped from
the area of study. This request is based on the distance from
the Sunnyside Mine (down gradient from probable mine pool
elevations) and a lack of geologic evidence that any conduits
may exist in that directio- from the Sunnyside Mine.
SGC also requests that the Division' s position that four
quarters of inventory data be collected before valve closure
be reconsidered due to the limited time available for
collecting meaningful data as explained above and because of
additional confidence that water that has passed through the
Sunnyside Mine can be found due to the proposed use of a
tracer as explained below.
As suggested by the Division, a tracer feasibility study
was performed for SGC by Simon Hydro-Search, Inc . This
study evolved into a work plan after identification of
bromide as a feasible tracer element. For additional
assurance, this plan underwent peer review by Tracer
Research Corporation. The work plan is entitled Work
Plan to Perform a Tracer Test - September 3, 1993 and is
attached for your review.
i a,•.
The key elements of the study and SGC' s proposal to use
bromide as a tracer to detect waters that have passed
through the Sunnyside Mine and appeared on the surface as
seeps, spring, etc. are presented below.
Y ` ,
Bromide is not significantly affected by precipitation,
' absorption or biological activity. It can be detected at
levels of 0. 01 ppm and is not a regulated ground-water
constituent. It is considered benign at the proposed
concentrations (page 6 - Work Plan to Perform a Tracer
Test) .
Analysis for bromide has been included in the water
survey. Background levels for all analysis received to
date have been less than the detection limit of 0. 01 ppm.