impressive flooding kuantan, page-24

cafa,

That's funny, Jade Lee just posted a similar comment on the PDNHP facebook page.

Jade Lee
"Is Lynas prepared for the kind of flash flood in Kuantan? NO - in its waste management plan, it mentioned 100 year events but its Residue Retention Facility - ie the waste retention ponds - are NOT designed for this kind of deluge!!"

Reply:

From LAMP EIA

Surface water runoff (including rainfall runoff) and supernatant liquor from the RSF will be segregated from the main plant site drainage system and managed separately. This is to ensure that these sources of water pollution do not mix with uncontaminated surface water from other parts of the plant site. Any supernatant liquors and surface runoff associated with RSF cells will be conveyed to dedicated RSF retention ponds prior to return to the waste water treatment facility (WWTF), or to the cracking and separation process in the case of the WLP storage cells.
During the operational phase, the surface of active FGD, NUF and WLP residue containment cells will be continuously contoured by earthmoving equipment to a slope of approximately 100H:1V as the residue are placed within the respective cells. The residue will then be compacted to direct surface water towards a single supernatant/surface runoff retention pond within the RSF cells. The FGD and NUF cells will share a common pond whilst the WLP containment cell will have a separate dedicated retention pond due to its physio-chemical properties.
The retention ponds will be lined with high density polyethylene (HDPE) and the capacity designed to cater for the 1 in 100 year storm event based on climatic data for the region. Water from this pond will be discharged to the nearest pipeline access point for return to the Wastewater Treatment Plant (WWTP) located within the plant process area.
The composition of surface water runoff and supernatant liquors from the WLP residue is not expected to be suitable for release back into the environment. Instead this water stream will be recycled into the cracking and separation process stream and as such, surface water runoff will be directed or pumped to a separate HDPE-lined surface water retention pond with capacity for the 1 in 100 year storm event based on climatic data for the region. From the retention pond, the effluent will be pumped via pipeline to the nearest pipeline access point for return to the cracking and separation facility.