Laserfiche WebLink
Page 2! <br />COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale -Page 25 Permit No. CO-0045675 <br />Total Radium 226+228, pCl/1 Monthly Grab <br />Total Selenium, mg/I Monthly Grab <br />Potentially Dissolved Silver, mcyl Weekly Grab <br />Total Natural Uranium, mg4 Monthly Grab <br />Potentially Dissolved Zinc, m<yl Weekly Greb <br />Total Fluoride, mcyl Weekly Grab <br />Total Sulfate, mg4 Weekly Grab <br />' 11 a visible sheen is noted, a grab sample shall be colleded and analyzed for oil and grease. fie results ara to be reported on the <br />OMR underparameter code no. 03582. <br />VI. A. 1. Eltiuent Monitodng (Cont.) <br />As indicated an page 14 o(the permit, when the most sensitive analytical method which complies with this <br />part, has a detection limit greater than or equal to the permit limrt, the permittee shall report 'less than (the <br />detectable limit),' as appropriate. Such reports shall not be considered as violations of the permk limit. The <br />present lowest method detection limits for specific parameters (which have limitations which are, in some <br />cases, less than or equal to the detection limd) are as follows: <br />Arsenic 0.01 mryl <br />Cadmium 0.0003 mg/ <br />Chromium 0.01 mgA <br />0.01 mgA <br />Chromium, Hexavalent 0.01 mgA <br />0.0002 mgA <br />Copper 0.005 mgrl <br />Cyanide 0.010 mg4 <br />Metals and WAD Cyanide must be analyzed 6y methods capable of producing calculated method detection <br />limits equal to or less than the values listed above. !n the calculation of average concenvaG'ons of these <br />parameters, those analytical results that are less than the method detection limit shall be considered to be <br />zero for calculation purposes. If all individual analytical results that would be used in the calculations are <br />below the method detection limit, the 'less than X ; where x is the method detection limit, shall be reported. <br />Otherwise, report the calculated value. <br />2. Special Monitoring: Six Times Analysis: BMRUBMGC is required to perform asix-time (monthly) analysis for <br />ammonia, meroury, nitrate, nitrite, and suKde in the 001 discharge. Also, WAD cyanide will be required semi- <br />annuallyfor atwo year pedod. This analysis is being required to verify that these parameter levels in the <br />treated wastewater discharge are at insignificant levels. Previous data indicates that these parameters have <br />been detected below minimal levels of detection or at very low levels below the water qualty standards. See <br />Part I.B.3 0(the permit /or further information related to the six-time analysis. <br />ll evaluation o/the data demonstrates a de(nite or probable vitiation of water quality standards, the permit <br />may be amended to incorporate additional monitoring and/or limtatons, as allowed under Part II.B.S of this <br />permit. Additional monitoring may also be required where the detection limit for a parameter is above the <br />appropdate water quality standards. <br />Lead 0.005 mryl <br />Total Mercury 0.00025 mgrl <br />Selenium <br />Silver <br />Zinc 0.05 mgA <br />3. Discharoe Point 002 Monltodnggequirements: Tables VI-4A, B, and C below list the mondodng requirements <br />for Discharge Point 002, including sample type and frequency. <br />Table VI-4A - <br />/or <br />Monitoring Well BF-4 <br />Monitoring Well t3F-5 <br />Monitoring Well M-16 <br />Monitoring Well M-20 <br />Weekly Elevation Measurement <br />Weeky Elevation Measurement <br />Weekly Elevation Measurement <br />Weekly Elevation Measurement <br />