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).
12 water temperature dictates when trout will feed and it should dictate when the angler will fish 13 water has its greatest density at 38 to 39 degrees and trout seldom hit when the water temperature is below 40 degreesfrequently taking the water temperature tells you if it s rising or falling one degreehe immediate effect of water temperature going down in the spring is trout quit feeding after the spring flood when the stream returns to normal flow the angler can find the best fishing for big trout