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2010-08-02_REVISION - M1977300 (25)
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2010-08-02_REVISION - M1977300 (25)
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Last modified
6/15/2021 3:06:16 PM
Creation date
8/4/2010 8:44:44 AM
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Template:
DRMS Permit Index
Permit No
M1977300
IBM Index Class Name
REVISION
Doc Date
8/2/2010
Doc Name
New Amend.- EPP- Surface Water Quality Data.
From
Cotter Corp.
To
DRMS
Type & Sequence
AM2
Media Type
D
Archive
No
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Environmental Protection Plan, Schwartzwalder Mine 11-6 <br />• Table 11-4. Water Quality Standards for Ralston Creek Stream Segment 17b <br />STREAM SEGMENT DESCRIPTION <br />REGION: 3 <br />BASIN: Clear Creek <br />STREAM SEGMENT: 176. Mainstem of Ralston Creek from the source to the inlet of Arvada Reservoir, including Ralston Reservoir, and Upper Long Lake. <br />DESIGNATION: <br />QUALIFIERS: Water +Fish <br />CLASSIFICATIONS: Aq Life Cold 2, Recreation U, Water Supply, Agriculture <br />NUMERIC STANDARDS <br />Basis of calculated standards: <br />pH = 7.06 s.u., low-flow average at SW-BPL, post sump shut-off <br />T = 1.25 °C, low-flow average at SW-BPL, post sump shut-off <br />Hardness = 163 mg/L, low-flow average at SW-BPL, post sump shut-off <br /> Physical and Biological acute chronic <br /> D.O.* 6.0 mg/L <br /> D.O. (sp)* 7.0 mg/L <br /> pH* 6.5-9.0 S.U. <br /> F. Coli* 200/100mL count <br /> E. Coli* 126/100mL count <br /> Inorganic <br /> Ammonia* 22.8 5.77 (elsp) mg/L as N total <br /> Chlorine* 0.019 0.011 mg/L total residual <br /> Cyanide* 0.005 mg/L free <br /> Sulfur* 0.002 mg/L <br /> Boron* 0.75 mg/L <br /> Nitrite* 0.05 mg/L <br /> Nitrate* 10 mg/L <br /> Chloride* 250 mg/L <br /> Sulfate (ws)* 250 mg/L <br /> Metals <br /> Aluminum 750 87 ug/L total recoverable <br /> Arsenic, * 340 0.02 (t rec) ug/L dissolved <br /> Cadmium(* 2.60(1) (tr) 0.61(2) ug/L dissolved <br /> Chromium III* 50 --- ug/L total recoverable <br /> Chromium VI* 16 11 ug/L dissolved <br /> Copper* 21.3 13.6 ug/L dissolved <br />. Iron, dissolved (ws)* 300 ug/L dissolved <br /> Iron, t rec* --- 1000 ug/L total recoverable <br /> Lead* 109.5131 4.27(4) ug/L dissolved <br /> Manganese* 3513 1941 ug/L dissolved <br /> Manganese (ws)* --- 50 ug/L dissolved <br /> Mercury, Total* --- 0.01 ug/L total <br /> Nickel* 707.9 78.6 ug/L dissolved <br /> Selenium* 0.0184 0.0046 ug/L dissolved <br /> Silver* 4.70(s) 0.74 ug/L dissolved <br /> Thallium --- 15.00 ug/L dissolved <br /> Uranium, biota 4116 2571 ug/L dissolved <br /> Uranium, humans 0.03 mg/I, dissolved <br /> Zinc* 217.4(6) 188.5(7) ug/L dissolved <br /> Radionuclides <br /> Americium 241 0.15 pCi/L total <br /> Cesium 134 80 pCi/L dissolved <br /> Plutonium 239 and 240 0.15 pCi/L total <br /> Radium 226 and 228 5 pCi/L total <br /> Strontium 90 8 pCi/L total <br /> Thorium 230 and 232 60 pCi/L total <br /> Tritium 20,000 pCi/L dissolved <br /> NOTES: <br /> Standards from Colorado Administrative Code SCCR 1002-31 and SCCR 1002-38 (effective July 1, 2007) <br /> Values in this table calculated using a water effect ratio (WER) of 1.0 unl ess otherwise noted <br /> *Required by site-specific standards <br /> (sp) - spawning standard <br /> (elsp) - early life stages present <br /> (ws) - water supply standard <br /> (tr) - trout standard <br /> (1) Cadmium KA = 1.136672 - (ln(hardness) x 0.041838) = 0.924 <br /> (2) Cadmium KC = 1.101672 - (In(hardness) x 0.041839) = 0.889 <br /> (3) Lead KA = 1.46203 - (In(hardness) x 0.145712) = 0.720 <br /> (4) Lead KC = 1.46203 - (In(hardness) x 0.145712) = 0.720 <br /> (5) Silver KA = 0.5 <br /> (6) Zinc KA = 0.978 <br /> (7) Zinc KC = 0.986 <br /> Equation for Ammonia acute standard is based on "salmonids present:" = 0.275/(1+10'30'PH) + 39.0/(1+l OPH-1.24) <br /> Equation for Ammonia chronic standard is based on elsp = 2.85 x [0.0577/(1+10'?6s8-pH) + 39.0/(1+10PH - 1.111 )) when T < 22.15 <br /> Note: Colorado began adopting new designations for recreational water quality classifications in 2005. Under the new nomenclature, Category E is existing primary contact <br /> recreation (formerly Category la). <br /> 4109C.100731 Whetstone Associates
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