8 components: 100mg/l each of Benzene [CAS:71-43-2] ; 1,2-Dichloroethane [CAS:107-06-2] ; Trichloroethene [CAS:79-01-6] ; Tetrachloroethene [CAS:127-18-4] ; Chloroform [CAS:67-66-3] ; Tribromomethane [CAS:75-25-2] ; Bromodichloromethane [CAS:75-27-4] ; Dibromochloromethane [CAS:124-48-1] in Methanol