The NFPA 70E Standard details multiple levels of Hazard Risk Categories (HRC) [see table 1.1], also called Levels. The greater the risk: the higher the HRC. Arc Rating is the factor that indicates which HRC is necessary, and can be measured in either ATPV or EBT.
The optimal pH range for brook trout appears to be 6.5-8.0,with a tolerance range of 4.0-9.5.Brook trout occur in waters with a wide range of alkalinity and specificconductance, although high alkalinity and high specific conductance usuallyincrease brook trout production (Cooper and Scherer 1967).
State Record: 4 lbs, 12 oz. Fishing Tips: Brook Trout are aggressive feeders eating insects, crayfish, salamanders, and other fish. Food is typically in short supply in headwater streams so Brook Trout rely heavily prey that falls into the stream (e.g., ants, caterpillars, inchworms).