Table 3

Table 1. Dissolved Zinc and Cadmium Concentration Summary Upstream and Downstream of SMC, mg/L.

Study	Date	Upstream zinc range	Downstream zinc range	Upstream Cd range	Downstream Cd range
USGS	April 1987-1988	0.007-0.17	0.27-0.59	<0.001-0.002	<0.001-0.004
USGS	July 1988	3.4	2.3	0.013-0.017	0.006-0.007
Weston	July 1988	NA	NA	0.007	<0.005
EPA	May 2000	0.092	0.47	<0.001	<0.001
EPA	September 2000	0.64	0.46	<0.005	<0.005
USGS	March 2000	0.25	0.97	0.0037	0.0024
USGS	August 2000	0.90	1.65	<0.001	0.0029
USGS	May 2002	0.36^a	1.57	0.0035	0.0013
BLM	July 2002	0.32^b			<0.005
Utah water quality standard^c		0.39	0.39	0.00076	0.00076

^a west fence line, ^b at main beaver pond, ^chardness @400 mg/L

shaded areas exceed or potentially exceed Utah water quality standards

Table 2. XRF Analytical Results, Silver Maple Claims Surface Grid, mg/kg

(Note: 25 mg/kg substituted for non-detects to compute means; background (Weston, 1989))