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CRAPTERFOUR Responses to Public and I~lency Comments <br />Letter and • <br />Comment No. Response <br />F-2.19 The Agency Preferred Alternative incorporates mitigation measures to <br />protect water quality from spills and runoff. Refer to the :Pipeline Plan of <br />Development (Appendix E) for protection and monitorin@; measures for the <br />pipelines. The evaporation pond and MVR pond would be visually <br />inspected on a daily basis as discussed in Section 2.2.5.4 ~~f the Draft EIS. <br />Refer to the Groundwater and Surface Water Monitoring Plan (Appendix <br />G) for measures to prevent contamination and monitor w<der quality. The <br />ROD will also include conditions of approval to protect water quality from <br />spills and runoff. <br />F-2.20 Figures 2-1 a through 2-1 b of the Draft and Final EIS show the proposed <br />pipeline route. From these figures, it is appazent that alluvial aquifers most <br />likely impacted by a potential pipeline spill or leak include two crossings of <br />Piceance Creek, pipeline traverses along ephemeral streazns -Hatch Gulch, <br />Collins Gulch, a short traverse along Stewart Gulch, and :final traverse <br />south along the middle fork and main branch of Pazachute Creek. <br />Figure C-1 (modified) of the Final EIS provides locations of water wells <br />along the pipeline route. According to the Colorado Division of Water <br />Resources, the agency does not require submittal of water quality analyses <br />from well permittees. Therefore, acquiring groundwater quality data from <br />the public domain is problematic. The requirement to place monitoring <br />wells along the pipeline mute to establish water quality iri the alluvial <br />aquifers appeazs to be excessive since this has not typically been a <br />requirement of other pipeline companies proposing to traivsport more <br />hazardous substances through their pipelines (e.g., petroleum products) in <br />this region. <br />F-2.21 Refer to response to Comment F-2.20. Additionally, the Groundwater and <br />Surface Water Monitoring Plan presented in Appendix G, when <br />implemented, would provide baseline groundwater quality information at <br />the Piceance and Parachute sites prior to project start-up. <br />F-2.22 Refer to the Reclamation Plan (Appendix H) and Pipelinc: Plan of <br />Development (Appendix E) for specifics on soil erosion smd sediment <br />control measures to be implemented. These plans aze part of the Agency <br />Preferred Alternative. <br />F-2.23 The previous Soil Conservation, Erosion, and Sediment (:ontrol Plan has <br />been revised and is included (entire document) as Appendix H in the Final <br />EIS. A discussion of Best Management Practices (BMPs) is provided in <br />Section 3.3 of Appendix H, and descriptions of BMPs aze: provided in <br />Appendix A through E of Appendix H. BMPs would be selected and used <br />on asite-specific basis and would be tailored to meet the site-specific <br />requirements to which they are applied. <br />4-8 <br />