If outside the pH and turbidity parameters, what action must the discharger take?

If outside the pH and turbidity parameters, what action must the discharger take?

• A. Notify the Regional Water Board
• B. Conduct a construction run-on and pollutant source evaluation to determine whether pollutant sources contributed to the exceedance and implement corrective actions
• C. Immediately stop construction
• D. Ignore until next monitoring period

Answer: (B)

When a parameter like pH or turbidity falls outside its permitted range, the next necessary step is to conduct a construction run-on and pollutant source evaluation to determine whether pollutant sources contributed to the exceedance and to implement corrective actions. This evaluation helps pinpoint where pollutants are coming from—whether from site runoff, erosion, failed BMPs, or upgradient sources—and guides adjustments to controls such as stabilization, sediment barriers, and drainage management to bring measurements back into compliance. Notifying the Regional Water Board, stopping construction, or waiting until the next monitoring period aren’t automatically required actions in this scenario; the focus is on identifying sources and applying corrective measures to address the exceedance.

When a parameter like pH or turbidity falls outside its permitted range, the next necessary step is to conduct a construction run-on and pollutant source evaluation to determine whether pollutant sources contributed to the exceedance and to implement corrective actions. This evaluation helps pinpoint where pollutants are coming from—whether from site runoff, erosion, failed BMPs, or upgradient sources—and guides adjustments to controls such as stabilization, sediment barriers, and drainage management to bring measurements back into compliance. Notifying the Regional Water Board, stopping construction, or waiting until the next monitoring period aren’t automatically required actions in this scenario; the focus is on identifying sources and applying corrective measures to address the exceedance.