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.
The purpose of the rock outlet protection is to reduce the. depth, velocity, and energy of water, such that the flow will. not erode the receiving downstream reach. Scope. This standard applies to the planning, design, and. construction of rock riprap and gabions for protection of. downstream areas.