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4. Recommendations for Water Quality Management


4.1 Remediation

· Efforts to reduce fecal coliforms, non-filterable residues, turbidity, and periphyton chlorophyll-a levels in this river should continue as outlined in the B.C. Water Quality Status report, including rehabilitating streamside vegetation, and preventing direct access to the water by cattle (Ministry of Environment, Lands and Parks, 1996).

4.2 Monitoring

· Monitoring should continue for the following variables related to agriculture, forestry and urbanisation: flow, hardness, periphyton chlorophyll-a, fecal coliforms, true colour, E. coli, ammonia, total dissolved nitrogen, pH, total dissolved phosphorus, non-filterable residue, sulphate, turbidity and specific conductivity.
· The following metals have had levels exceeding criteria within the past two years, and thus should be monitored (total and dissolved): aluminium, chromium, copper, iron, manganese, and titanium.
· Minimum detectable limits (MDLs) should be lowered for antimony, arsenic, cadmium, chromium, copper, lead, selenium, silver, thallium and zinc. MDLs should be at least 10 times below the water quality criteria for all variables.
· Increased sampling of 5 samples in 30 days should be employed for copper, E. coli and fecal coliforms to compare to criteria and objectives more precisely.

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