Laserfiche WebLink
plan are a summary of the sampling/monitoring events, a list of sampling protocols, and the <br /> quality assurance and quality control measures. Appendix A includes the well location maps <br /> and sampling requirements table. Appendix B includes procedural guidelines for sample <br /> preparation in the field. Appendix C contains sample datasheet examples for the groundwater <br /> sampling project. Appendix D is the NS Quality Assurance Project Plan. The contents of this <br /> document will be updated periodically as necessary. <br /> Groundwater monitoring is conducted to ensure that the NS mining operations do not <br /> significantly affect the groundwater quality of Underground Sources of Drinking Water <br /> (USDWs). The objective of groundwater monitoring is to record and track the groundwater <br /> conditions of various aquifers. This objective is accomplished by collecting water level <br /> measurements (manually and/or by transducers, as appropriate), field measurements <br /> (conductivity, pH and temperature) and samples of groundwater from monitoring wells for <br /> analysis by an independent laboratory. Tables of results, statistical analysis tables, and <br /> graphical representation of the sampling results are compiled. <br /> Groundwater monitoring wells are sampled on a monthly, quarterly, and/or annual basis per <br /> the schedule indicated in Appendix A, Table 4. Quarterly injectate sampling requirements are <br /> also included in Appendix A. Water levels are measured, and field parameters are collected for <br /> the wells. Samples are collected for laboratory evaluation of major and/or minor constituents. <br /> The results of periodic groundwater sampling and monitoring, in addition to statistical analysis <br /> of analytes are presented in monthly, quarterly, and / or annual reports. Groundwater <br /> monitoring wells must be labeled, covered to prevent migration of surface contaminants to the <br /> groundwater, and secured to restrict access. <br /> 2.1 Background Information <br /> 2.1.1 Site Location and Description <br /> The NS sodium bicarbonate processing plant is in Township 1 South, Range 98 West, Section 26, <br /> in Rio Blanco County, Colorado. A general location map is presented in Figure 1. NS operations <br /> are currently permitted to occur on four sodium leases, encompassing approximately 8,378.9 <br /> acres. The four individual sodium leases (C-0118326, C-0118327, C-0119986, and C-37474) are <br /> unitized under the C-0118326 designation (the Lease). <br /> No drinking water wells are located within a one-mile radius of the site. The four major surface <br /> water drainages on or near the site are measured and sampled at four locations annually by the <br /> USGS. These locations include the Piceance Creek below Ryan Gulch (USGS Station #6200), <br /> Piceance Creek at White River (USGS Station #6222), Corral Gulch near Rangely <br /> Daub &Associates, Inc. 2 NS LLC 2022 SAP <br />