On June 14th, 2001,
the University was issued with a Trade Effluent Discharge
Licence (TEDL) by Dun Laoghaire Rathdown County Council.
This is a licence to discharge trade effluent or other
matter to a sewer, under the Local Government (Water
Pollution) Acts, 1977 and 1990. This licence is subject
to certain conditions which the University must observe.
It is therefore important that you think before you
put anything down the sink!
In accordance to Section 1.2 of the TEDL, no substance
shall be present in the trade effluent in such concentration
as would constitute a danger to personnel working in
the sewer or to the sewer fabric or would interfere
with the operation of downstream wastewater treatment
works.
Representative samples are taken every second month
and results for the following parameters measured: Temperature,
pH, Oils, Fats and Grease, Total Phenols, Total Suspended
Solids, BOD, COD, Lead, Nickel, Copper, Chromium, Arsenic
and Detergents in accordance with Section 4 of the TEDL.
The University is subject to random sampling and analysis
for the criteria listed below by the County Council.
As set down in Section 2 of the TEDL the trade effluent
discharge must not exceed the following parameters:
- Temperature: Will not
exceed 42 degrees centigrade
- pH: Will lie in the range
6.0 to 10.0
- BOD (Biochemical Oxygen Demand):
Over any 24 hour period the mean concentration of
BOD in the trade effluent shall not exceed 600mg/l
O2 and the total maximum concentration of BOD shall
not exceed 1000mg/l O2. The total quantity of biochemical
oxygen demand discharged in this period shall not
exceed 1200 Kgs.
- COD (Chemical Oxygen Demand):
Over any 24 hour period the mean concentration of
COD in the trade effluent shall not exceed 1200mg/l
and the total maximum concentration of COD shall not
exceed 2000mg/l. The total quantity of chemical oxygen
demand discharged in this period shall not exceed
2400 Kgs.
- Suspended Solids: Over
any 24 hour period the mean concentration of suspended
solids in the trade effluent shall not exceed 800mg/l
and the total maximum concentration of suspended solids
shall not exceed 1000mg/l . The total quantity of
suspended solids discharged in this period shall not
exceed 1600 Kgs.
- Detergents: Will not
exceed 100mg/l and the total quantity of detergents
discharged per day shall not exceed 200 Kgs.
- Oils, Greases and Fats:
Will not exceed 200mg/l. The total quantity of oils
greases and fats discharged per day will not exceed
400 Kg.
- Petroleum Hydrocarbons or Organic Solvents:
The trade effluent will not contain petroleum hydrocarbons
or organic solvents (including chlorinated solvents)
which would give rise to flammable or explosive vapours
in the sewer.
- Phenols: Will not exceed
1mg/l. The total quantity of phenols discharged per
day shall not exceed 2 Kgs.
- Chromium* (Cr): Will
not exceed 1mg/l
- Copper* (Cu): Will not
exceed 1mg/l
- Lead* (Pb): Will not
exceed 1mg/l
- Nickel* (Ni): Will not
exceed 1mg/l
- Zinc* (Zn): Will not
exceed 1mg/l
*The total quantity of each of the above metals discharged
per day shall not exceed 2.0 Kgs.
- Arsenic** (As): Will
not exceed 0.1mg/l
**The total quantity of Arsenic (As) discharged per
day shall not exceed 0.2 Kgs.
These parameters are monitored by an external analytical
group every two months, and randomly by Dun Laoghaire
Rathdown County Council. |
