|
Table 1.Proposed Quarterly Sampling Suite
<br /> Surface Water Quality Standard,
<br /> Domestic Water
<br /> Segment 17b,
<br /> Included in Current Ralston Creek CDPHE 2018 Included in Current Supply-Drinking
<br /> Surface Water Groundwater Sample Water Standards
<br /> �ARALM A04s Sam e, 'te s ? Acute Chronic Suite? CDPHE 2016
<br /> Copper µg/L Yes,Table 1 21.3 13.6 Yes,Table 2 1,000
<br /> Cyanide(weak acid dissociable) µg/L Yes,Table 1 5 --- No 200
<br /> Iron µg/L Yes,Table 1 --- 300 Yes,Table 2 300
<br /> Lead mg/L No 109.46 4.27 No 50
<br /> Manganese µg/L Yes,Table 1 3,513.36 1,941.14 Yes,Table 2 50
<br /> Mercury mg/L No -- 0.01 Yes,Table 2 2
<br /> Yes,Table 5(Mine
<br /> Silver µg/L Yes,Table 1 4.7 0.17 Pool Only,Sample ID= 50
<br /> RAW FEED
<br /> Thallium µg/L Yes,Table 1 none none Yes,Table 2 2
<br /> Table 1,Code 1, 4,115.95 2,570.93
<br /> Uranium µg/L Yes,Table 2 30
<br /> Code 3
<br /> USEPA MCL=30 USEPA MCL=30
<br /> Zinc µg/L Yes,Table 1 249.51 188.98 Yes,Table 2 5,000
<br /> Radionuclides
<br /> Gross Alpha pCi/L Yes,Table 1 none none Yes,Table 2 15
<br /> Gross Beta pCi/L Yes,Table 1 none none Yes,Table 2 --
<br /> Radium-226,Total pCi/L Yes,Code 3 none none Yes,Table 2
<br /> Radium-226,Dissolved pCi/L Yes,Table3 and Code none none No --
<br /> Combined Radium(Radium pCi/L Yes,Table 1 none none No 5
<br /> 226+228)
<br /> References:
<br /> Colorado department of Public Health and Environment(CDPHE). 2018. 5 CCR 1002-38,Regulation Number 38,Classification and Numeric Standards
<br /> for South Platte Basin,Laramie River Basin,Republican River Basin,Smoky Hill River Basin,Appendix 38-1:Stream Classifications and Water Quality
<br /> Standards Tables. Water Quality Control Division. June.
<br /> CDPHE.2006. 5 CCR 1002-41,Regulation No.41.-The Basic Standards for Ground Water. Water Quality Control Division. December.
<br /> CDPHE. 2011.Notice of Violation(NOV)/Cease and Desist Order(CDO),Number I0-100601-1.Water Quality Control Division. September.
<br /> Wheatstone Associates(Whetstone).2016. Schwartzwalder Mine,Environmental Protection Plan,Revision 1.0. Table 11-6 Comparison of Water Quality
<br /> in Ralston Creek to Aquatic Toxicity Standards. September.
<br /> PAGE 7 OF 24
<br />
|