The amount of harmful petrochemicals leaked in a major incident Fujian this month is more than many thought – much more.

The amount of C9 aromatic hydrocarbon leaked into the sea in southern China was 10 times higher than the original amount reported, according to the results of a government investigation announced at a press conference on Sunday.

The investigation found that a total of 69.1 metric tons of the chemical, a substance frequently used as a solvent in pain and rubber products, was leaked during the spill, which occurred when an aging pipe broke as the chemical was being transferred onto a tanker. Fujian Donggang Petrochemical, the owner of the terminal, originally reported that only 6.9 metric tons had been spilled. The government put Donggang Petrochemical at fault for neglecting to maintain its equipment, failing to adequately follow safety procedures, and deliberately concealing the amount of chemical spilled.

After the spill, more than 50 villagers were hospitalized due to exposure to the chemical, which causes nausea, vomiting and cramps. Many complained that their fishing livelihoods had been ruined as the chemical killed much of the fish stock, tainted what remained, and destroyed equipment. Seven people have been arrested in relation to the spill.

Related: Police Barged Into My Room While I Was Covering the Fujian Chemical Spill