River Boyne Water Quality Management Plan - EPA

Rivrr Boyar Walrr Qualily Managrrnmr PlanCritical Flows and DischargesIn general, the specified water quality standards will be taken to apply only at flows equal to orgreater than the 95 percentile flow. In the case of dissolved oxygen (D.O.), the 99.9 percentile limitof 4 mgll 02 for salmonid waters will apply at all flows including the dry weather flow. Similar flowconditions will apply to the 99.9 percentile limit for oxidised nitrogen of 11 mgll N. Standards fortoxic substances such as heavy metals apply for all flows including the dry weather flow.In calculnting the impact of a waste discharge, the objective should be not to exceed a BOD limit of 4mgll, in order to allow a margin for cany-over from other discharges. An effluent discharge shouldnot result in a BOD increment of more than 2 mg/l02 in the receiving water.6.4 Other Sources of Waste DischargeThe plan must have regard to the existing and potential pollution from waste discbarges other thandomestic or industrial effluent. Such discharges can derive from :-mAgricc~Iture ; including animal manures and silage liqzror cnd fertiliser run-offDomestic Septic Tanks ; organic and nutrient discharges caq prise from unsatisfactory septiclanh and small package systems associated with inadPc.&ate design, poor maintenancc.u~isotisfactory percolation arecs and bypassing direct to$atercourses\3. ,$09.iPeat SiItdion ;[here is evidence of pearsilt&~?n the upper section of [he main channel.7 .\iand it S hlporfant tributaries. This caqbie rise to increased coloirr nrrd possib!yeutrophicatiorz arisi~gjko~io,,l the huniic c&&&'xes associated with pear silt+& 0. S'.-,.\' ..\'Forestry ; areas zoned for affore6;&t+% should have nio17itori1ig of ivater quality ptlrarneterstto aysoss the possible effects on yder quality, particularly where lakes and rivers ore usedfor abstractionFor inspection purposes only.Consent of copyright owner required for any other use.LarrJfrII Sites ; firture public arid private IandfiN sites will be required to conform with strictsiting and leachate control criteria to prevent migration of pollution to the watercourses.Monitoring of existing sites is required to assess possible groundwater and surface waterimpacts and to determine whether control measures ore necessaryPetrol and Diesel Storage ; overground tanks containing diesel fuel, heating oil or othersiniilar products, other than doniestic installations, should be bunded to contain the liquids incase of spillage. AN discharges from filling stations should be firred with petrol interceptorsto prevent contamination of water courses.Surveys should be carried out to identify and map sources of waste from agriculture. Field surveyshave indicated unsatisfactory effluent storage facilities and lack of control of soiled water from openyard systems. Comprehensive farm surveys are required to establish catchment farm records to beintegrated to the G.I.S. system, together with records of monitoring and pollution incidents. Thissystem should provide the basis for undertaking measures, where necessary, to protect water qualityEPA E\m~ll ,, ..~-2ll~lX~l~ .-,EPA Export 26-07-2013:17:27:02