Dechakanee Leranon from the Rassada Municipality, which is currently monitoring the site for any health problems, told The Phuket News that 200 fish had died from pollution in the canal.
The pollution was under control and there were were several main reasons for it, he said.
The bad smell coming from the site was mostly coming from the burnt goods – including 430 tonnes of spoiled fresh fruit and produce, meat and seafood, and toxic chemicals such as insecticide and chemicals that had been burnt in the fire, he said.
SuperCheap now have control of the site back from the forensic scientists, and the cleanup is due to begin.
To help reduce the smell on the site, Mr Dechakanee said staff at the Municipality would use lime (calcium hydroxide) mixed with water to spray around the burnt building, which would hopefully reduce the smell.
Authorities also plan to use Effective Micro-organisms (EM) balls to reduce water pollutants and improve the water quality in the canal and also in pools of stagnant water at the SuperCheap site. These EM balls were used extensively during the Bangkok floods of 2011. One EM ball can disinfect four cubic metres of polluted water.