46. To determine the suspended matter reduction performance of 2 storm water management works of a different nature installed in series, equation 3-12 must be used. Note that no reduction performance is recognized for a pretreatment work unless such a work is listed in Table 3.17.Equation 3-12: P = A + B – [(A × B)/100]
where: | P | = | Suspended matter reduction performance for 2 storm water management works installed in series (%); minimum value of 80%; |
| A | = | Reduction performance of the storm water management work situated upstream in accordance with Table 3.17 (%); |
| B | = | Reduction performance of the storm water management work situated downstream in accordance with Table 3.17 (%). |