6.2sq km exploitable underground salt area exploitble storage of 200000000 tons Salt, Refined salt, PDV salt ISO 9001-2008 Salt, Refined salt, PDV salt6.2 sq ... .021SO4%0.45F(mg/kg)4.8Ba ≤15.00 IndexPurified Industrial(usage) SaltTop gradeA gradeNacl(%) >=99.1098.5water(%)<=0.300.50Water ... +,(%)<=0.250.40(SO4)2-,(%)<=0.300.50 Natural refined salt industrial grade