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82. Page 8-24, fourth paragraph. What happens to the dissolved sodium carbonate input into <br />the pond? Does it precipitate? Is there any information on expected long-term salinities? <br />(Wyoming trona mine ponds have 270,000-310,000 ppm - Is this likely here?) <br />To be addressed later. <br />Cultural Resources <br />83. It is assumed the Cultural Resources Survey Report will provide all information needed. <br />The 1998 Cultural Resources Survey Report was delivered to Woodward-Clyde on <br />September 4, 1998. This report summarizes all existing information for the Piceance <br />Site, including historical survey information and the results of the 1996 and 1997 <br />cultural resources surveys. The report also provides cultural resources information <br />for the portion of the project pipeline corridor surveyed in 1998. Information <br />collected in 1994 on the remainder of the pipeline corridor (Barrett 1994, CIG 1995) <br />was determined by the BLM to be adequate and has been presented in the <br />Commercial Mine Plan. <br />Noise <br />84. reference/backup data/calculations refemng to Table 8-2, Estimated Noise Levels 50 Feet <br />From Source <br />Source of noise levels measured at a distance of 50 feet for Table 8-2: <br />Hatano, M. M. 1980. Caltrans Noise Manual. FHWA/CA/TL- <br />80107. State Department of Transportation, Sacramento, California. <br />In addition, the complete reference for Table 7-8 is: <br />U.S. Environmental Protection Agency (EPA). 1974. Information <br />on Noise Levels Identified as Requisite to Protect Public Health and <br />Welfare with an Adequate Margin of Safety. EPA-500/9-74-004, <br />Arlington, Virginia. <br />85. reference to background level of 4~ db(A) cited in Section 8.12 Noise, Background Noise <br />Levels <br />Baseline noise data for the Piceance Site came from the BLM's Environmental <br />Assessment for the Yankee Gulch Joint Venture Sodium Leases, cited in the <br />Commercial Mine Plan as BLM 1932. <br />32 <br />