2020 MS4 General Permit Appendix A: Alum or Ferric Chloride Phosphorus Treatment Systems 2020 MS4 General Permit Appendix A: Alum or Ferric Chloride Phosphorus Treatment Systems

Appendix A. Alum or Ferric Chloride Phosphorus Treatment Systems

Table 1:
Monitoring parameters during operation

Station	Alum parameters	Ferric parameters	Units	Frequency
Upstream- background	Total Phosphorus Dissolved Phosphorus Total Aluminum Dissolved Aluminum pH Flow	Total Phosphorus Dissolved Phosphorus Total Aluminum Dissolved Aluminum pH Flow	mg/L mg/L mg/L mg/L SU Mgd	1 x week 1 x week 1 x month 1 x week 1 x week Daily
Alum or Ferric Chloride Feed	Alum	Ferric	Gallons	Daily total dosed in gallons
Discharge from treatment	Total Phosphorus Dissolved Phosphorus Total Aluminum Dissolved Aluminum pH Flow	Total Phosphorus Dissolved Phosphorus Total Aluminum Dissolved Aluminum pH Flow	mg/L mg/L mg/L mg/L SU Mgd	1 x week 1 x week 1 x month 1 x week 1 x week Daily