Document: NRC Regulatory Guide
Document ID: eb3f5778-b26b-4ba0-9962-f7101bddfff7
Document Type: regulatory_guide
Title: (Rev. 3005)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML0037/ML003739900.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.8
CFR Part: 
CFR Title: 

Content:
issolved and particulate materials released by the plant to the receiving waters at concentrations in the effluent above ambient and may include biocides, corrosion inhibitors, heavy metals, corrpsion products, and in-plant treatment chemicals. (2) Dissolved Gases. Monitor aqueous concentra tions of dissolved gases such as oxygen and nitrogen in the vicinity of the plant. (3) Thermnal Measurments. Monitor the thermal characteristics of the receiving waters upstream and downstream of the plant discharge. (4) Erosion and Sedimentation. Monitor erosion and sedimentation processes in the vicinity of the plant. b. Terrestrial (1) Soil Chemistry. Monitor changes in soil chemistry at facilities with cooling towers, or where existing surface water runoff patterns have been modified. (2) Ground Water. Monitor changes of ground water levels and/or the artesian properties of existing ground water sources at facilities where consumptive use of ground water and other plant-related activities may adversely affect ground water resources in the site environs. (3) Other Program Elements. Monitor unique plant or sitp features to evaluate potential adverse terrestrial impacts. This activity may include monitoring the effects of herbicides used to maintain transmission lUne rights of way, measuring noise, monitoring effects of onsite or nehrsite solid waste disposal operations, and measuring physical effects of fogging, icing, and drift contaminants from closed-cycle cooling systems. 3.1.2 Biotic a. Aquatic (I) General Ecological Survey. Determine the effects of plant operation by comparing operational and preoperational values of selected ecological parameters that can adequately gauge changes in the distribution and abundance of species populations identified in baseline studies or control area studies as particularly vulnerable to impact. Key indicator organisms should be identified prior to plant startup. Endangered or threatened species should receive special attention. (2)