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GENERAL47733
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Last modified
8/24/2016 8:23:03 PM
Creation date
11/23/2007 3:44:24 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1988112
IBM Index Class Name
General Documents
Doc Date
11/22/1999
Doc Name
SAN LUIS MINE PROJECT BMRI
From
KELLY HAGLUND GARNSEY & KAHN
To
DMG
Media Type
D
Archive
No
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Ms. Lori Potter <br />November 3, 1999 <br />Page 4 <br />Figure 2-1 <br />Inc <br />Flow lines are shown from the Filter Press and the Concentrate Liquid-Solid Separator to the <br />Discharge Effluent. Is this correct? <br />Please describe "reinjection" of concentrate. A separate flow line is show connectint; the Filter <br />Press and the Concentrate Liquid-Solid Separator back to the influent, so it is not clew r what is <br />meant by reinjection. <br />Appendix A, Section 2.2, Page 3, Paragraph 2, Lines 2 and 3 <br />Wells BF-1 and BF-2 are located within the source area and typically have the highest levels of the <br />proposed performance program water quality parameters at the site. Wells M-19 and M-20 are in <br />the area most impacted by the West Pit seepage, and also have very high concentrati ins of the <br />water quality parameters. All four wells are located in the area that will be behind th=slurry wall <br />(see Figure 2-3). We feel that it is improper to include these four wells in the "perforrnance- <br />monitoring zone". The chemistry of these four wells should be separately tracked. <br />Appendix A, Section 2.2, Page 4, Paragraph 1, Line 3 <br />By "MW-wells", does BMRI mean "M-Wells"? As previously discussed, wells M-19 and M-20, are <br />located in an area that will be behind the slurry wall. We feel that it is improper to include these <br />two wells with the downgradient alluvial wells, M-21, M-22, M-23, M-24, M-11 R, M-31, and M-26, <br />when calculating the performance-monitoring zone statistics. The chemistry of wells BF-1, BF-2, M- <br />19, and M-20 should be separately tracked. <br />Aaaendix A, Section 2.2, Page 4, Second Bullet <br />Wells BF-1 and BF-2 are located within the source area. Wells M-19 and M-20 are located in an <br />area that will be behind the slurry wall. Once again, we feel that it is improper to include these <br />four wells in the "performance-monitoring zone". The chemistry of these four wells s could be <br />separately tracked. <br />~endix A, Section 2.3, Page 6, List of Parameters <br />The water quality standards for the Rio Grande Basin Stream Segment No. 28, Mainsh~m of the Rito <br />Seco from the source to the outlet of Salazar Reservoir, are provided in the CDPHE Water Quality <br />Control Commission Regulation No. 36, Classification and Numeric Standards for Ric• Grande <br />Basin, last updated on December 30, 1998. Please note the following discrepancies Between the <br />list provided by BMRI, and that published by the CDPHE: <br />The manganese standard is for the dissolved form, not the total recoverable form; <br />The chromium III standard is for the total recoverable form, not the dissolved form; <br />
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