67. The total storage capacity for the accumulation of sediments and water of all pretreatment cells if sand or other aggregate is used in winter as abrasive in the territory draining to the dry retention system or the permanent volume retention system is established using equation 3-17:Equation 3-17: Vcell2 = 1.20 × Vcell1
where: | Vcell2 | = | Total storage capacity for the accumulation of sediments and water of all pretreatment cells if sand of other aggregate is used in winter as abrasive in the territory draining to the dry retention system or the permanent volume retention system (m3); |
| Vcell1 | = | Total storage capacity for the accumulation of sediments and water of all pretreatment cells established using equation 3-16 (m3). |