石狩東部広域� �道企業団水質� ��査結果: PFOSおよびPFOA濃 度管理.pdf

On August 17, 2023, at 6:08 AM, the air temperature was 20.5℃ and the water temperature was 16.2℃. The concentrations of certain substances in the water were as follows:
1. Antimony and its compounds: < 0.0002 mg/L
2. Uranium and its compounds: < 0.0002 mg/L (temporary)
3. Nickel and its compounds: 0.002 mg/L
4. 1,2-Dichloroethane: < 0.0004 mg/L
5. Turbidity: < 0.001 mg/L
6. Furaldehyde (2-ethylhexyl) : < 0.005 mg/L
7. Calcium, Magnesium and hardness: 15.9 mg/L
8. Dissolved oxygen: 2.3 mg/L
9. 1,1,1-Trichloroethane: < 0.001 mg/L
10. Methyl-t-butyl ether: < 0.001 mg/L
11. Organic matter (KMnO4 consumption): 7.6 mg/L
12. Odor intensity (TON): 10-3 below
13. Turbidity: 1 degree below
14. pH value: 7.30-7.5 degree
15. Corrosivity (Lange index): -2.5
16. Belonging bacteria (colony-forming units per mL): 25,000-2000 (temporary)
17. 1,1-Dichloroethane: < 0.002 mg/L
18. Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA): < 0.000002 mg/L (except items 6 and 18, which should be 10-100 mg/L)

The water quality was checked by the Fisheries Research Institute of Hokkaido and the Hokkaido Pharmaceutical Association Public Health Examination Center. The target values for the water quality were set as follows:
- PFOS and PFOA: 0.00005 mg/L (temporary)

Note: The concentrations of certain substances are given in mg/L, and the target values are given in mg/L.