589 



carrying Dangerous Chemicals in Bulk adopted by the Assembly 

 of the Organization in Kesolution A.212 ( VII) and as may be amended 

 by the Organization, provided that the amendments to that Code are 

 adopted and brought into force in accordance with the provisions of 

 Article 17 of the present Convention for amendment procedures to an 

 Appendix to an Annex. 



Appendix I 



GUIDELINES FOK THE CATEGORIZATION OF NOXIOUS LIQUID SUBSTANCES 



Category A. — Substances which are bioaccumulated and liable to 

 produce a hazard to aquatic life or human health ; or which are highly 

 toxic to aquatic life (as expressed by a Hazard Rating 4, defined by a 

 TLm less than 1 ppm) ; and additionally certain substances which 

 are moderately toxic to aquatic life (as expressed by a Hazard Rating 

 3, defined by a TLm of 1 or more, but less than 10 ppm) when particu- 

 lar weight is given to additional factors in the hazard profile or to 

 special characteristics of the substance. 



Category B. — Substances which are bioaccumulated with a short 

 retention of the order o,f one week or less ; or which are liable to pro- 

 duce tainting of the sea food ; or which are moderately toxic to aqua- 

 tic life (as expressed by a Hazard Rating 3, defined by a TLm of 1 

 ppm or more, but less than 10 ppm) ; and additionally certain sub- 

 stances which are slightly toxic to aquatic life (as expressed by a 

 Hazard Rating 2, defined by a TLm of 10 ppm or more, but less than 

 100 ppm) when particular weight is given to additional factors in 

 the hazard profile or to special characteristics of the substance. 



Category C. — Substances which are slightly toxic to aquatic life 

 (as expressed by a Hazard Rating 2, defined by a TLm of 10 or more, 

 but less than 100 ppm) ; and additionally certain substances which 

 are practically non-toxic to aquatic life (as expressed by a Hazard 

 Rating 1, defined by a TLm of 100 ppm or more, but less than 1,000 

 ppm) when particular weight is given to additional factors in the 

 hazard profile or to special characteristics of the substance. 



Category D. — Substances which are practically non-toxic to aquatic 

 life, (as expressed by a Hazard Rating 1, defined by a TLm of 100 

 ppm or more, but less than 1,000 ppm) ; or causing deposits blanket- 

 ing the seafloor with a high biochemical oxygen demand (BOD) ; or 

 highly hazardous to human health, with an LD50 of less than 5 mg/ 

 kg ; or produce moderate reduction of amenities because of persistency, 

 smell or poisonous or irritant characteristics, possibly interfering with 

 use of beaches: or moderately hazardous to human health, with an 

 LD50 of 5 mg/kg or more, but less than 50 mg/kg and produce slight 

 reduction of amenities. 



Other Liquid Substances (for the purposes of Regulation 4 of this 

 Annex). — Substances other than those categorized in Categories A,. 

 B. C and D above. 



