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USE OF THE SOUTH AFRICAN NATIONAL WATER ACT, 1998 (ACT 36 OF 1998) TO REGULATE PACKAGE PLANTS Department of Water Affairs and Forestry.

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Presentation on theme: "USE OF THE SOUTH AFRICAN NATIONAL WATER ACT, 1998 (ACT 36 OF 1998) TO REGULATE PACKAGE PLANTS Department of Water Affairs and Forestry."— Presentation transcript:

1 USE OF THE SOUTH AFRICAN NATIONAL WATER ACT, 1998 (ACT 36 OF 1998) TO REGULATE PACKAGE PLANTS Department of Water Affairs and Forestry

2 Increasing risk of impacts Licences High potential risk if impact uncontrolled Must register General Authorisations Common use – low risk of impacts Registration in most cases Schedule one water use Widespread use – minimal or no risk of impacts No registration required

3 General Authorisations Published in Govt Gazette, 26 March 2004 Reviewed every 5 years Objectives: authorise water use that exceeds Schedule One definitions, but does not impact on a water resource or any other persons water use, property or land and exceed the capacity of that resource or the needs of other users alleviate burden of issuing licenses to certain minor water users

4 Irrigation of wastewater can only take place: above the 1:100 floor line of a water resource or alternatively, more than 100 metres from the edge of a water resource or a borehole which is utilised for drinking water or stock watering, which ever is further; and on land that is not, or does not, overlie a Major Aquifer General Authorisations – 21 (e) (irrigation of wastewater) Registration of the water use

5 General Authorisations – 21 (e) (irrigation of wastewater) Wastewater quality requirements for irrigation of up to 2000 m 3 /per day : Faecal coliforms≤1000 per 100 ml Chemical oxygen demand≤ 75 mg/l pH5.5 – 9.5 Ammonia≤ 3mg/l Nitrate/nitrite≤ 15 mg/l Chlorine≤ 0.25 mg/l Suspended solids≤ 25mg/l Orthophosphate≤ 10 mg/l Electrical conductivity70 mS/m above intake to maximum 150 mS/m Soap, oil & grease≤ 2.5 mg/l Fluoride≤ 1 mg/l

6 Monitoring requirements for irrigation with wastewater the quantity must be metered and the total recorded weekly the quality must be monitored monthly as at the last day of each month by grab sampling, at the point at which the wastewater enters the irrigation system map demarcating the area utilised for irrigation details of crops under irrigation irrigation management techniques management/control of contaminated runoff from the irrigation area, odour & nuisance control

7 General Authorisations – 21 (f)) Discharge to a water resource "domestic wastewater" means wastewater arising from domestic and commercial activities and premises, and may contain sewage "domestic wastewater discharge" means a wastewater discharge consisting of 90% or more domestic wastewater, by volume, that is collected, treated and subsequently disposed of Does not apply to a person who discharges wastewater: through sea outfalls; to an aquifer; any other groundwater resource; or any water resource with a closed drainage system

8 May discharge up to 2000 m3/per day of wastewater to a water resource that is not a listed water resource, provided the General Limit Values (GLV’s) are compiled to. May discharge up to 2000 m3/per day of wastewater to a water resource that is a listed water resource, provided the Special Limit Values (SLV’s) are compiled to. General Authorisations – 21 (f)) Discharge to a water resource Must register the water use with DWAF

9 SUBSTANCE/PARAMETERGENERAL LIMITSPECIAL LIMIT Faecal Coliforms (per 100 ml)≤ Chemical Oxygen Demand (mg/l)≤ 75 (i)≤ 30(i) pH5,5-9,55,5-7,5 Ammonia (ionised and un-ionised) as Nitrogen (mg/l) ≤ 6≤ 2 Nitrate/Nitrite as Nitrogen (mg/l)≤ 15≤ 1,5 Chlorine as Free Chlorine (mg/l)≤ 0,250 Suspended Solids (mg/l)≤ 2510 Electrical Conductivity (mS/m)70 mS/m above intake to a maximum of 150 mS/m 50 mS/m above background receiving water, to a maximum of 100 mS/m Ortho-Phosphate as phosphorous (mg/l)≤ 101 (median) and 2,5 (maximum) Fluoride (mg/l)≤ 1 Soap, oil or grease (mg/l)≤ 2,50

10 SUBSTANCE/PARAMETERGENERAL LIMITSPECIAL LIMIT Dissolved Arsenic (mg/l)≤ 0,02≤ 0,01 Dissolved Cadmium (mg/l)≤ 0,005≤ 0,001 Dissolved Chromium (VI) (mg/l)≤ 0,05≤ 0,02 Dissolved Copper (mg/l)≤ 0,01≤ 0,002 Dissolved Cyanide (mg/l)≤ 0,02≤ 0,01 Dissolved Iron (mg/l)≤ 0,3 Dissolved Lead (mg/l)≤ 0,01≤ 0,006 Dissolved Manganese (mg/l)≤ 0,1 Mercury and its compounds (mg/l)≤ 0,005≤ 0,001 Dissolved Selenium (mg/l)≤ 0,02 Dissolved Zinc (mg/l)≤ 0,1≤ 0,04 Boron (mg/l)≤ 1≤ 0,5

11 Monitoring requirements for discharge of wastewater to a water resource the quantity of the discharge must be metered and the total recorded weekly details of failures and malfunctions in the discharge system and details of measures taken the quality of domestic wastewater discharges must be monitored monthly by grab sampling and analysed for specific substances and parameters as per the table below:

12 1 000 to cubic metrespH Electrical Conductivity (mS/m) Faecal Coliforms (per 100 ml) Chemical Oxygen Demand (mg/l) Ammonia as Nitrogen (mg/l) Nitrate/Nitrite as Nitrogen (mg/l) Free Chlorine (mg/l) Suspended Solids (mg/l) Ortho-Phosphate as Phosphorous (mg/l) DISCHARGE VOLUME ON ANY GIVEN DAY MONITORING REQUIREMENTS 10 to 100 cubic metrespH Electrical Conductivity (mS/m) Faecal Coliforms (per 100 ml) 100 to 1000 cubic metrespH Electrical Conductivity (mS/m) Faecal Coliforms (per 100 ml) Chemical Oxygen Demand (mg/l) Ammonia as Nitrogen (mg/l) Suspended Solids (mg/l)

13 Some problems experienced with package plants Consistent non-compliance to the General Limit Values (GLV’s) contained in the General Authorisations. Particularly ammonia and E. coli and occasionally COD Excessive use of detergents and other cleaning agents Operational and maintenance problems Monitoring requirements – results not submitted to DWAF regularly

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15 Translation: Norwegian to English BLONDIN

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