2009-10-23_PERMIT FILE - M2009076 ‎(19)‎

• Permit No: M2009076
• IBM Index Class Name: PERMIT FILE
• Doc Date: 10/23/2009
• Doc Name: Appl. Items Corrected & Resubmitted
• From: Venture Resources, Inc.
• To: DRMS
• Email Name: ACS
• Media Type: D
• Archive: No

R7
Permit Compliance Limits. Based on Historic & Current Big 5 Tunnel Discharge*
Metal Limit
(micrograms/liter) Limit, m
(milligrams/liter) Justification
Arsenic, As 10 0.01 Historic Big 5
Barium, Ba 2000 ??? 2 Domestic Water Std.
Cadmium, Cd 48 0.048 Historic Big 5
Chromium, Cr 100 0.1 Domestic Water Std.
Copper, Cu 2960 2.96 Historic Big 5
Lead, Pb 91 0.091 Historic Big 5
Manganese, Mn 32,200 32.2 Historic Big 5
Mercury, Hg 2 0.002 Domestic Water Std.
Selenium, Se 50 0.05 Domestic Water Std.
Silver, Ag 50 0.05 Domestic Water Std.
Zinc, Zn 9770 9.77 Historic Big 5
*Note: It is necessary to apply a dilution factor of 1:3 to lab analysis of pilot plant samples in order to correlate the
data to proposed Mobile Mill operations. Refer to the explanation in the attached Waste Stream Characterization.
See 6.3.3(2)(b) for a detailed explanation of Points of Compliance.
6.4.20(10)(a)(i)
There are no Designated Chemicals to be used in this operation. Refer to Exhibit C, 6.3.3(2)(a) for a list of non-
designated chemicals to be used. There is also a complete collection of MSDS for these chemicals at the end of
Exhibit C.
There are no extractive metallurgical processes proposed as part of this operation, only gravity and flotation
concentration methods.
6.4.20(10)(a)(ii)
The stormwater management design has been performed by a CO licensed professional engineer. See this design in
Exhibit C and Exhibit E.
6.4.20(10)(a)(iii)
The stormwater management design has been performed by a CO licensed professional engineer. See this design in
Exhibit C and Exhibit E.
A Colorado Discharge Permit is not required because there is zero process water discharge to surface waters and the
process water is nearly 100% recycled back to the mill.
6.4.20(10)(b)
The stormwater management design has been performed by a CO licensed professional engineer. See this design in
Exhibit C and Exhibit E.
6.4.20(11)(a)
Clear Creek is located 2,800' to the south and 1,000' in elevation below the Tailings Impoundment affected area.
Drainage from this area follows down Hukill Gulch. Historically, the drainage from this vicinity contains acid-
runoff/drainage from the numerous abandoned mine waste rock piles and adits located throughout this normally dry
gulch. Many of these sources are not within the control of Venture Resources (ie Colorado School of Mines owns
over a dozen properties downgradient in this vicinity; one of which, the Edgar Union Lode, contains three large
dumps that is 350' downgrade from the proposed Tailings Impoundment).
A Colorado Discharge Permit is not required because there is zero process water discharge to surface waters and the
process water is nearly 100% recycled back to the mill.
However, DRMS has requested surface water quality data and analysis.
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