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Well completion records are summarized in appendix C. <br /> 7.3 SURFACE AND GROUNDWATER QUALITY <br /> Site water quality grab sampling commenced in 2007 with quarterly sampling commencing in <br /> 2010. Surface water sampling was collected from five stations in 2010 Two sampling sites <br /> were located on the La Plata River and another two were located on Little Deadwood Gulch a <br /> tributary to the La Plata River. The fifth sample location was established (May, 2011) in a <br /> historic tailings pond less than 10 feet from the LaPlata River. <br /> Four groundwater wells were installed and sampled in 2012. A well was located in the La Plata <br /> River alluvium and the others were located near the Idaho building, May Day No. 1 portal and <br /> the May Day No. 2 portal <br /> 7.3.1 Surface Water Quality <br /> The water quality reference information follows: <br /> • Table 3a Analyte list; <br /> • Table 3b Analytical methods used and laboratory detection limits; <br /> • Table 3c Groundwater quality standards; <br /> • Table 3d Sampling frequency summary. <br /> Surface water samples were taken in accordance with the following Operators Standard <br /> Operating Procedures (SOPs): <br /> • Surface Water and Seep Sampling(SOPs) ; <br /> • Stream Flow Measurements(SOPs); and <br /> • Sample Chain of Custody(SOPs) <br /> Surface water samples have been obtained from the La Plata upstream (SW-1-Table 4) and La <br /> Plata downstream of the mine site (SW-2-Table 5); Deadwood Gulch above (DG-1 Table 6), <br /> below(DG-2-Table 7)the mine site on Deadwood Gulch and samples from the Wetlands <br /> (Wetlands Table 8). Surface water sampling sites were established in May of 2010 with the <br /> exception of the wetland sampling site. The wetland sampling site was established in May 2011 <br /> at the request of CDRMS. It is important to note that samples were not obtained from a <br /> sampling site if there were no flows, or if the site was snow covered as noted in the November, <br /> 2010 through 2016 sampling results. <br /> The Colorado Division of Public Health and the Environment Water Quality Control Division <br /> (CDPHE) stream classification associated with the May Day Idaho Mine Complex is CosJLP01 <br /> with a"temporary use" water quality designation. The segment is described as the "main stem <br /> of the La Plata River, including all wetlands and tributaries from the source to the Hay Gulch <br /> diversion south of Hesperus" Colorado. The surface water quality standards pertaining to the <br /> May Day Idaho Mine Complex <br /> M-1981-185 <br /> January 19, 2017 <br /> Page I - 12- <br />