Table 9.2 Summary of Water Quality Objectives for Marine Waters of Western Buffer Water Control Zone

Parameter	Objective	Part(s) of Zone
E. coli	annual geometric mean not to exceed 610/100 ml	secondary contact recreation subzones; fish culture subzones
Dissolved Oxygen within 2 m of bottom	not less than 2 mg/L for 90% samples	marine waters
Depth averaged Dissolved Oxygen	not less than 4 mg/L for 90% samples	marine waters
pH value	within the range 6.5 to 8.5; change due to waste discharge not to exceed 0.2	marine waters
Salinity	change due to waste discharge not to exceed 10% of natural ambient level	whole zone
Temperature	change due to waste discharge not to exceed 2^oC	whole zone
Suspended solids	waste discharge not to raise the natural ambient level by 30%, nor cause the accumulation of suspended solids which may adversely affect aquatic communities	marine waters
Nutrients	not to be present in quantities that cause excessive growth of algae or other aquatic plants annual mean depth-averaged inorganic nitrogen not to exceed 0.4 mg/L	marine waters marine waters
Unionized Ammonia	annual level should not exceed 0.021 mg/L	whole zone