Shigella sonnei (the most common species in the U.S.) Shigella flexneri; Shigella boydii; Shigella dysenteriae; The transmission of most Shigella infections is caused by the bacterium passing from stools or soiled fingers of one person to
System maintenance. One advantage of the septic tank/absorption field system is that it has no moving parts, but it does require maintenance. Annual inspections of your septic system are recommended to ensure that it is working properly and to determine when scum and sludge in the septic tank should be cleaned out.
OSHA standards related to lockout/tagout. What must employers do to protect employees? The standards establish requirements that employers must follow when employees are exposed to hazardous energy while servicing and maintaining equipment and machinery. Some of the most critical requirements from these standards are outlined below: