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).
Steelhead (Rainbow Trout). Oncorhynchus mykiss. Other names: steelhead trout, sea-run rainbow trout Average size: 8-11 lbs, up to 40 lbs. Steelhead and rainbow trout are the same species, but rainbow are freshwater only, and steelhead are anadromous, or go to sea.Unlike most salmon, steelhead can survive spawning, and can spawn in multiple years.Spawning. Steelhead spawn in the spring.teelhead (Rainbow Trout). Oncorhynchus mykiss. Other names: steelhead trout, sea-run rainbow trout Average size: 8-11 lbs, up to 40 lbs. Steelhead and rainbow trout are the same species, but rainbow are freshwater only, and steelhead are anadromous, or go to sea.