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COLORADO DEPARTMENT OF PUBLlC HEALTH AND THE ENVIRONMENT, Water Qualiry Control Division <br />Rationale -Page 7, Permit No. CO-0045225 <br />Table II/-l Metals Standards Summary -Cripple Creek, Segment 21 of [he Upper <br />Arkansas Sub-basin of the Arkansas River Basin, AU Concentrations Are ug/! <br />.Stream Standard, ug/l <br />Me.[al Acute ... Chronic Analytical Method <br />Selenium 135 17 Dissolved <br />Silver <br />Zinc <br />1.2 0.044 <br />90 8/ <br />Dissolved <br />Dissolved <br />Iron <br />Manganese <br />Iron <br />Manganese <br />Temoorarv Modifications -Effective Through 12/3//97 <br />- 2,200 Total Recoverable <br />2, 300 <br />Dissolved <br />Underlying Standards - F,fjective Through I/1 /98 <br />- 1,000 Total Recoverable <br />1,000 <br />Dissolved <br />8. Receiving Water Data <br />1. Quality - Qualiry data for Cripple Creek are available jot stations that have been operated by [he permittee. <br />Station CCOI is located in Cripple Creek above Squaw Gulch, and Station 0002 is located below Squaw <br />Gulch. ALso, two samples were collected from the Squaw Gulch drainage, below the /ronclad Overburden <br />Storage Area, from standing water that was left after storms in a settling pond. <br />The data collected from these stations is summarized in the jollawing tables. <br />Table III - 3a Quality of Standing Water in Squaw Gulch Settling Pond <br />Paiameler ::. .-: Sample Date 4/22/96' Sample Date 7/27/96 <br />Total Hardness, mg/f as CaCO3 44.9 118 <br />Nitrate, mg/f as N 0.75 3.2 <br />Total Cyanide, mg/1 <0.01 <0.01 <br /> For.Metals-T e.of.Analysis <br />YP :For Metals.-: <br />Pe o .. np <br />yst;.. .< <br /> D... PD TR . , D PD TR T.:.. <br />Aluminum, mg/l 2.18 0.355 1.65 163 408 <br />Arsenic, mg/1 <.005 <.005 6.005 <.005 <.005 0.095 <br />Cadmium, mg/l 6.001 <.001 <.001 0.002 0.0030 0.003 <br />Chromium, mgA <.001 <.001 0.012 <0.001 0.013 0.236 <br />Copper, mg/l 0.006 0.021 0.016 0.011 0.084 0.288 <br />Iron, mg/f 0.078 0.095 0.103 0.117 0.391 10.4 303 <br />Lead,mg/1 0.026 0.006 0.002 0.004 0.0040 0.048 <br />Manganese, mg/1 0.091 0.09 0.371 2.08 3.26 4.22 <br />Mercury, mg/1 <.0002 <.0002 0.0005 <br />Nickel, mg/[ <.005 <.005 0.008 0.009 0.021 0.078 <br />Selenium, mg/1 <.005 <.005 <.0005 <.005 <.005 <.005 <0.010 <br />Silver, mg/1 <.001 <.001 <.001 6.001 <.001 0.007 <br />Zinc, mgR <.OS <.OS 0.103 0.103 0.366 0.513 <br />D -Dissolved PD - Potemially Dissolved <br />TR -Total Recoverable T -Total <br />