2008-09-19_REVISION - M1997032

• Permit No: M1997032
• IBM Index Class Name: REVISION
• Doc Date: 9/19/2008
• Doc Name: Address designated mining operation status
• From: Denison Mines
• To: DRMS
• Type & Sequence: AD1
• Email Name: RCO
• Media Type: D
• Archive: No

Table 3
CDPHE Regulation Number 41- The Basic Standards for Groundwater
3a. Domestic Water Supply - Human Health Standards
Anal e' Standard 2
Antimony Sb d.M 0.006 m /I
Arsenic As d,M 0.01 m /I
Barium Ba d,M 2.0 m /I
Beryllium Be d.M 0.004 m' /I
Cadmium Cd d.M 0.005 m `/I
Chromium Cr IAM 0:1 m /I
Fluoride F d.M 4.0m /I
Lead Pb d 0.05 m /I
Mercury [inorganic]
H d'M
0.002 m /I
Molybdenum Mod 0.035 m /I
Nickel Ni d 0.1 m /I
Nitrate N03 d.M 10.0 m /I as N
Nitrite NOz d,M 1.0 m /L as N
Total Nitrate+Nitrite N02+NO3-N d.f 10.0 m /I as N
Selenium Se d.f 0.05 m /I
Silver A d 0.05`m /I
Thallium TI d.M 0.002 m /I
Uranium U d,M 0.03 m /I
Gross Alpha Particle Activity 15 DCi/I
Beta and Photon Emitters e 4 mrem/ ear
3b. Domestic Water Supply - Drinking Water Standards
Anal a Standard
Chloride CI d 250 m /I
Copper Cu d 1 m /I
Iron Fe d 0.3 m /I
Manganese Mn d 0.05 m /I
H 6.5-8.5
Sulfate (S04 )'I 250 m /I
Zinc Zn ° 5 m /I
3c. Agricultural Standards
Anal a Standard
Aluminum AI d•f 5 m /I
Arsenic As d 0.1 m /I
Beryllium Be d 0.1 m /I
Boron B dig 0.75 m /I