The water in the tank may not only get contaminated en route or at an inadequate source (Fig. 5.2), but the tank itself may be contaminated after being used to transport toxic substances. SEWAGE DISPOSAL In addition to the water supply, the disaster may also affect the sewerage system, either by structural damage, breaks in the network, electric power failures, main blockage from debris, or flooding of the mains and septic pits with consequent sewage overflow.
El agua del tanque no solo se puede contaminar durante el recorrido o proceder de una fuente inadecuada (figura 5.2), sino también porque el propio tanque haya sido utilizado con anterioridad para transportar substancias tóxicas. Figura 5.2. Fuentes de agua contaminada.