Laserfiche WebLink
COLORADO DEPARTMENT OF HEALTH <br /> Water Quality Control Division <br /> Rationale - Page 3 <br /> PERMIT NUMBER: CO-0000396 <br /> FACILITY DESCRIPTION (Continued) <br /> 1/ This portion of the mine is closed and no <br /> discharge is occurring. <br /> 2/ Mine dewatering <br /> 3/ Locations are shown in figure 1 , page 19 of <br /> this permit. <br /> EFFLUENT DATA: A review of the permittee' s discharge monitoring <br /> reports between 10/1/79 and 9/30/81 is outlined <br /> below. Discharge point 001 discharged between <br /> 10/1/79 and 7/l/80; 002 discharged between 4/1/80 <br /> and 7/1/80; 003 discharged between 4/1/80 and <br /> 10/1/80; 004 discharged between 4/1/80 and 9/30/81 <br /> and 005 discharged between 4/1/80 and 9/30/81 . No <br /> discharge occurred from the other points. <br /> TABLE 2 -4r 4L i.iiA. <br /> Discharge point 001 1/ Discharge Point 002 1/ <br /> Parameter x S Parameter x S <br /> TSS 1 . 5 N/A TSS 2. 4 N/A <br /> Total Iron . 105 N/A Total Iron .75 N/A <br /> pH 7. 9 N/A pH 8. 6 N/A <br /> )i ; and grease 1 . 35 N/A Oil and grease .7 N/A <br /> Discharge point 003 1/ Discharge Point 004 <br /> Parameter x S Parameter x S <br /> TSS 4. 8 N/A TSS 1 . 3 1 .2 <br /> Total Iron . 3 N/A Total Iron .24 . 34 <br /> pH 8.25 N/A pH 8. 1 N/A <br /> Oil and grease . 95 N/A Oil and grease . 22 . 33 <br /> F:r '3 ioI(- E <br /> Discharge point 005 x = mean value S = standard <br /> deviation <br /> Parameter x S 1/ sufficient data is not <br /> available to calculate the <br /> TSS 5.2 6. 3 standard deviation. <br /> Total Iron . 35 .42 <br /> pH 8. 1 N/A <br /> Oil and grease 1 .2 1 .2 <br /> These data show that the permittee has had <br /> very low values for all parameters and has <br /> not had any parameters that consistently <br /> violated limitations. The permittee has had <br /> one violation, a TSS value of 50 mg/l at 001 <br /> since October 1979, the permit limit was 45 mg/l . <br /> STREAM DATA: Since all of the discharges with an intermittent <br /> nature. 002, 003, 004 and 005, flow to Creeks <br /> with zero low flow (Q7-10) there is no need to <br /> review instream data since a mass balance <br /> calculation will not be required. <br />