CSR

FY March 2016 Data on Water and Atmosphere

Water Pollutants

Hiroshima Plant

Wastewater Drainage Destination: Enko River and Kaita Bay

Water Pollutants Unit Regulation Actual
Max. Min. Avg.
pH (freshwater) - 5.8~8.6 7.4 6.8 7.0
pH (seawater) - 5.5~9.0 7.7 6.9 7.2
BOD mg/L 160 9.4 ND <2
COD mg/L 20 11 1.4 4.6
SS mg/L 200 9.6 0.8 4.4
Oil mg/L 5 ND ND ND
Fluorine (freshwater) mg/L 8 0.2 ND <0.1
Fluorine (seawater) mg/L 15 10 0.1 3.4
Copper mg/L 3 0.01 ND <0.01
Zinc mg/L 2 0.3 ND <0.1
Soluble iron mg/L 10 0.1 ND <0.1
Soluble manganese mg/L 10 0.7 ND <0.2
Chromium mg/L 2 0.01 ND <0.01
Total nitrogen mg/L 120 9.6 1.3 4.1
Total phosphorus mg/L 16 1.2 ND <0.22
Coliform groups colonies/cm3 3,000 520 ND <38
Boron (freshwater) mg/L 10 0.4 0.4 0.4
Boron (seawater) mg/L 230 2.4 0.2 1.5
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 3.4 1.2 2.5

The following substances were not detected: cadmium, cyanogen, organic phosphorus, lead, hexavalent chromium, arsenic, mercury, alkyl mercury, PCBs, trichloroethylene, tetrachloroethylene, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, 1,2-dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3-dichloropropene, thiuram, simazine, thiobencarb, benzene, selenium, 1,4-dioxane, and phenol.

Miyoshi Plant

Wastewater Drainage Destination: Basen River

Water Pollutants Unit Regulation Actual
Max. Min. Avg.
pH - 5.8~8.6 7.6 6.9 7.3
BOD mg/L 90 6.5 0.7 1.8
SS mg/L 90 7.7 0.9 2.5
Oil mg/L 5 ND ND ND
Fluorine mg/L 8 0.2 0.2 0.2
Zinc mg/L 2 0.02 0.02 0.02
Soluble manganese mg/L 10 0.2 ND <0.1
Total nitrogen mg/L 120 1 1 1
Total phosphorus mg/L 16 0.03 0.03 0.03
Coliform groups colonies/cm3 3,000 310 ND <35
Boron mg/L 10 ND ND ND
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 0.4 0.4 0.4

The following substances were not detected: cadmium, cyanogen, organic phosphorus, lead, hexavalent chromium, arsenic, mercury, alkyl mercury, PCBs, trichloroethylene, tetrachloroethylene, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, 1,2- dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3-dichloropropene, thiuram, simazine, thiobencarb, benzene, selenium, 1,4-dioxane, phenol, copper, soluble iron, and chromium.

Nishinoura District, Hofu Plant

Wastewater Drainage Destination: Oumi Bay

Water Pollutants Unit Regulation Actual
Max. Min. Avg.
pH - 5.0~9.0 7.0 6.5 6.8
COD mg/L 50 12 1.6 7.8
SS mg/L 40 5.3 0.7 3
Oil mg/L 2 ND ND ND
Zinc mg/L 2 0.3 0.1 0.2
Lead mg/L 0.1 ND ND ND
Soluble manganese mg/L 3 ND ND ND
Total nitrogen mg/L 120 10.5 0.8 3.5
Total phosphoru mg/L 16 3.8 0.1 1.7
Coliform groups colonies/cm3 3,000 42 0 21
Boron mg/L 230 0.8 ND <0.4
Fluorine mg/L 15 4.5 4.1 4.3
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 2.9 0.6 1.8

The following substances were not detected: cadmium, cyanogen, organic phosphorus, hexavalent chromium, arsenic, mercury, alkyl mercury, PCBs, trichloroethylene, tetrachloroethylene, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, 1,2- dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3-dichloropropene, thiuram, simazine, thiobencarb, benzene, selenium, 1,4-dioxane, phenol, copper, soluble iron, and chromium.

Nakanoseki District, Hofu Plant

Wastewater Drainage Destination: Oumi Bay

Water Pollutants Unit Regulation Actual
Max. Min. Avg.
pH - 5.0~9.0 7.7 6.6 7.5
COD mg/L 50 6.3 2.6 4.4
SS mg/L 40 4.2 ND <1.7
Oil mg/L 2 ND ND ND
Zinc mg/L 2 0.1 0.04 0.1
Copper mg/L 3 0.01 ND <0.01
Total nitrogen mg/L 120 13.9 4.1 7.8
Total phosphorus mg/L 16 1.2 0.1 0.5
Coliform groups colonies/cm3 3,000 ND ND ND
Boron mg/L 230 ND ND ND
Fluorine mg/L 15 ND ND ND
Ammonia, ammonium, nitrous acid, and nitrous acid compounds mg/L 100 5.9 4.2 5.1

The following substances were not detected: cadmium, cyanogen, organic phosphorus, lead, hexavalent chromium, arsenic, mercury, alkyl mercury, PCBs, trichloroethylene, tetrachloroethylene, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, 1,2- dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3-dichloropropene, thiuram, simazine, thiobencarb, benzene, selenium, 1,4-dioxane, phenol, chromium, soluble iron, and soluble manganese.

Atmospheric Pollutants

Hiroshima Plant
Atmospheric Pollutants Unit Regulation Actua(l Max.)
NOx Boilers ppm 150 72
Drying ovens ppm 250 58
230 46
Melting furnaces ppm 180 74
Diesel engines ppm 950 510
Heating furnaces ppm 200 34
180 29
150 110
130 70
Dust Boilers g/m3N 0.25 0.0024
0.1 0.0019
Drying ovens g/m3N 0.4 0.0032
0.35 0.0022
0.2 0.0078
0.15 0.0076
Melting furnaces g/m3N 0.4 0.0073
0.20 0.053
0.10 0.0011
Diesel engines g/m3N 0.10 0.02
Heating furnace g/m3N 0.4 0.006
0.20 0.0031
0.10 0.12
SOx K-value regulation - 7 0.91
VOC Painting facilities ppm 700 336
Washing facilities ppm 400 232
Miyoshi Plant
Atmospheric Pollutants Unit Regulation Actua(l Max.)
NOx Boilers ppm 250 160
Diesel engines ppm 950 450
ばいじん Boilers g/m3N 0.30 0.043
Diesel engines g/m3N 0.10 0.091
Nishinoura District, Hofu Plant
Atmospheric Pollutants Unit Regulation Actua(l Max.)
NOx Boilers ppm 150 53
130 62
Drying ovens ppm 230 39
Dust Boilers g/m3N 0.10 0.003
Drying ovens g/m3N 0.35 0.008
0.30 0.002
0.20 0.006
SOx K-value regulation - 4.5 0.001
Total pollutant load control m3N/h 36.16 0.04
VOC Painting facilities ppm 700 300
Nakanoseki District, Hofu Plant
Atmospheric Pollutants Unit Regulation Actua(l Max.)
NOx Melting furnaces ppm 180 38
Dust Heating furnaces g/m3N 0.25 0.002
0.20 0.002
Melting furnaces g/m3N 0.20 0.05
SOx K-value regulation - 4.5 0.014
Total pollutant load control m3N/h 17.47 0.76