Assuming rapid reaction rate, calculate the minimum PH necessary to reduce these metal concentrations to acceptable levels. Is this Ph consistent with what you might expect of the LAKE. Reclaimed wastewater in the storage tanks neat Lake BERRYESSA hadcu2+ and has Fe2+ concentrations in of 100mg/l well in excess of the limits of .3mg/? for Cu2+ and 15mg/L for Fe2+ required ford is charge.