Administration, Environmental Licensing Programme, Office of Climate, Licensing & Resource Use, Environmental Protection Agency Headquarters, PO Box 3000, Johnstown Castle Estate, Co. Wexford. Date 6 th August 2010 0409-011 RE: Regulation 16 Compliance for Camplie and Environs Waste Water Discharge Licence Application. Dear Mr. Higgins, I am to refer to letter of the 27 th July 2010 regarding the above, the requested clarification and additional information is outlined in the attached document. A pdf copy of this letter is included on the attached CD- along with the additional information. Yours truly, _____________________ Leonard Poole Sewage operations Office Wexford County Council For inspection purposes only. Consent of copyright owner required for any other use. EPA Export 26-07-2013:19:52:37
Transcript
Administration,
Environmental Licensing Programme,
Office of Climate, Licensing & Resource Use,
Environmental Protection Agency Headquarters,
PO Box 3000,
Johnstown Castle Estate,
Co. Wexford.
Date 6th August 2010 0409-011
RE: Regulation 16 Compliance for Camplie and Environs Waste Water
Discharge Licence Application.
Dear Mr. Higgins,
I am to refer to letter of the 27th July 2010 regarding the above, the
requested clarification and additional information is outlined in the attached
document.
A pdf copy of this letter is included on the attached CD- along with the
additional information.
Yours truly,
_____________________
Leonard Poole
Sewage operations Office
Wexford County Council
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Response in accordance with Regulation 18(3)(b) of the Waste Water Discharge
Authorisation) Regulation 2007 for Campile Agglomeration D0409-01
Point 1 Flow rate data of receiving waters and discharge volumes
Receiving water flow rates
The South East River Basin District, asses the body of water (Campile River) within
Campile and Environs Agglomeration as “Coastal Waters” and as such 95%ile flow
rate and DWF flow rate data are not possible.
Discharge volumes
Discharge points SW2 and SW3 are not equipped with flow measurement, thus it is
not possible to provide accurate discharge volumes. However anecdotal evidence
from operation staff is that SW3 only overflows in heavy rain events (SW 3 is equipped
with a tide-flex valve to prevent back flooding) and SW2 rarely operates.
Additionally both of these overflows exceed compliant requirements as defined in
“Procedures and Criteria in Relation to Storm Water Overflows”
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Point 2: SW2 / SW3 Compliance with definition of CSO
Compliance of SW3 CSO
Background
SW3 is a CSO on the trunk collection sewer (225mm diameters pre-cast concrete)
serving the whole of the agglomeration, located just south of bridge.
In accordance with the document “Procedures and Criteria in relation to Combined
Storm-water Overflows”, a CSO is deemed to be compliant if as minimum the forward
pass prior to discharge through overflow exceeds a predetermined volume, utilising
“Formula A = DWF + 1360 P + 2E
Where
DWF = dry whether flows for domestic population (l/day)
P = P.E Served
E = Commercial flows (l/day)
Minimum required forward pass rate for SW3
Minimum required daily forward pass for SW3 is 875370 litres (or 10.132 l/sec) based
on following calculation..
P = 549 P.E. (based on 2010 geo-directory house count and using 3 P.E./ House)
DWF= 93330 l /day (DWF per P.E. assumed to 170 litres / day)
E = 2700 l/day (all commercial activities are non wet -using EPA design data and
assuming 30 l / head per day) .
Therefore minimum required pass in litres / day equals
As the required minimum forward pass rate for SW2 based on Formula A is 10.132
l/sec and the pumping capacity of installed pumps (duty only) is 20 l/sec, this satisfies
the minimum requirement by a factor of 2, the overflow from SW2 is compliant with
the requirements of “”procedures and Criteria in relation to Storm Water Overflows”.
Point 3: Clarification of the classification of discharge points SW2 and SW3 SW2 Discharge Point SW2 is an emergency overflow from Campile Pumping Station, and
as such is classified as a “Secondary Discharge”, however as demonstrated in Point 2
above SW2 more than satisfies the required as defined in “Procedures and Criteria in
Relation to Storm Water Overflows” by a factor of 2.
SW3
Discharge point SW3 is a designed storm water overflow on a main trunk sewer and
as such is classified as a CSO, As demonstrated in Point 2 above it more than
satisfies the requirement for CSO compliance as defined in “Procedures and Criteria in
Relation to Storm Water Overflows” by a factor of 3.6.
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Point 4: Clarification of Pumping Station Details
The agglomeration contains 2 pumping stations namely Campile Pumping Station, the
main collection station and a small lift station located at Sliabh Coilte, a LA Estate
which pumps raw waste water to package treatment plant located within the Sliabh
Coilte site.
Campile Pumping Station
This station acts as a main collection and forwarding station for the agglomeration.
The station details are as follows:
o Station is equipped with 2 number submersible pumps, i.e. 1 No duty and 1 No.
standby pump.
o In the event of a power failure, the level will rise in sump and overflow via SW2,
in the event of a malfunction i.e. pump trip the station is equipped with standby
pump which will automatically be brought into operation. Station is not equipped
with ether neither telemetry nor alarm call out facilities.
o The usable storage capacity of pumping station is calculated to be 15 cubic
meters (2m X 3m X2.5m), not taking into account back flooding of sewer.
o The station is not equipped with standby generation, but is equipped with
standby pump. With regard to actions in the very rare event of the occurrence
of a power failure where the period exceeds storage capacity, the excess
settled waste water is discharged via an emergency overflow SW2. In event of
a malfunction i.e. pump trip the station is equipped with standby pump which
will automatically bring standby pump into operation.
o While the station is not equipped with overflow monitoring, based on anecdotal
evidence from operations staff, SW2 only rarely overflows in heavy rainfall
events: the additional discharge from station is in compliance with the
requirements as defined in “Procedures and Criteria in Relation to Storm Water
Overflows”
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Sliabh Coilte pumping station
This station collects waste from Sliabh Coilte estate and forwards to a package
wastewater treatment plant servicing estate. Both the treated effluent from plant and
an emergency overflow from lift station discharge to the trunk foul sewer servicing the
agglomeration. Thus as there is no discharge to the environment from neither the
pumping station nor estate, it is deemed that no further information is relevant or
clarification is necessary.
Point 5 : Final effluent compliance with regard to “Urban Waste Water Treatment
Regulations 2001.
As the agglomeration served is less than 2,000 p.e. and the discharge is to an area of
water body which is deemed to be Coastal Waters, in accordance with section 7
subsection 7(a) and 7 (b) of S.I. No 254/2001 Urban Waste Water Treatment
Regulations, 2001, discharge is required to be subjected to “Appropriate Treatment.”
As the originally submitted monitoring results of receiving waters and Appropriate
Assessment demonstrated only very minimal localised impact in area of discharge
from SW1, thus it can be deemed that the final effluent discharge meets the
requirement of Appropriate Treatment. as set out in S.I. No. 254/2001
However the provision for an improved level of treatment for Compile agglomeration is
envisaged. Submission from Wexford County Council to the Department of
Environment Heritage and Local Government, for funding to allow project to proceed
to planning phase have been made, and it is included in the National Water Service
Investment programme 2010 to 2012
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Point 6: Monitoring results for Primary discharge SW1
The effluent monitoring results for the past 12 months are attached on next page.
The result inputted for Boron via online web Tool was inadvertently incorrectly
imputed.
With regard to Tributyltin, we are advised by our independent lab that the current
best available detection limit is 0.02 mg/l for this parameter; as both results from
previous testing returned a result of less than 0.02 mg/l; we can see no point in
retesting for this parameter.
The corrected results have been uploaded on web link tool; additional copies of
the original test results from the independent lab are attached.
Retest of Primary discharge for the compounds Toluene and Copper is currently
been undertaken, and shall be forwarded once they become available.
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AFP 1032 50 Hz
ABS reserves the right to change any data and dimensions without prior notice and can not be held responsible for the use of information contained in this software.
ABSEL PRO 1.7.1 / 2005-03-17
Operating data specification Flow 21.2 l/s21.2 l/s Head 12.4 m12.4 mEfficiency 51.3 %51.3 % Shaft power 5.05 kW5.05 kWNPSH 3.5 m3.5 m Fluid Water Water Temperature 4 °C4 °C Nature of system Single head pump Single head pump No. of pumps 1 1
Pump data Type AFP 1032 50 Hz AFP 1032 50 Hz Make ABS ABS Series AFP M1-ME3 (1kW-22kW) AFP M1-ME3 (1kW-22kW) Impeller Vortex impeller Vortex impeller N° of vanes 6 6 Impeller size 258 mm258 mmFree passage 100 mm100 mm Suction port DN100 DN100 Discharge port DN100 DN100
Motor data Rated voltage 400 V400 V Frequency 50 Hz50 HzRated power P2 6 kW6 kW Nominal speed 1430 rpm1430 rpmNumber of poles 4 4 Efficiency 83.1 %83.1 %Power factor 0.832 0.832 Rated current 12.5 A12.5 AStarting current 67.9 A 67.9 A Rated torque 40.1 Nm 40.1 Nm Starting torque 70.9 Nm 70.9 Nm Degree of protection IP68 IP68 Insulation class F F
ISO 9906 Gr 2 Annex A1/A2 Testnorm
2008-02-19 0 5 10 15 20 25 30 35 40 45 50 Q [l/s]
123456789
1011121314151617
H [m]
345678
P2 [kW]
1020304050
η [%]
M60/4D 50HZ
51.3%Hydr.eff.
1
1
1
Hydraulic efficiency
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0 4 8 12 16 20 24 28 32 36 40 44 48 Q [l/s]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17H [m]
3
4
5
6
7
8
P2 [kW]
10
20
30
40
50
η [%]
M60/4D 50HZ
51.3%Hydr.eff.
1
1
1
Hydraulic efficiency
Pump performance curves
AFP 1032 AFP 1032 50 Hz
1430 rpm
FrequencyDischargeDN100
Reference curve
Curve number
5.05 kWRated power Hydraulic efficiency
3.5 m51.3 %12.4 m21.2 l/s
1 kg/dm³Density
NPSHHeadFlow
50 Hz
2010-07-27Date
1.562 mm²/sRated speedTestnorm
ISO 9906 Gr 2 Annex A1/A2 Viscosity
100 mmVortex impeller 6 258 mmABS reserves the right to change any data and dimensions without prior notice and can not be held responsible for the use of information contained in this software.
ABSEL PRO 1.7.1 / 2005-03-17
2008-02-19 RevisionSolid size ImpellerN° of vanesImpeller size
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EPA Export 26-07-2013:19:52:37
50 HzMotor performance curveM60/4D 50HZ
2010-07-27400 V1430 rpm6 kW
Tolerance according to VDE 0530 T1 12.84 for rated power
Moment of inertiaStarting torqueStarting current
Frequency
DateRated voltageNumber of polesNominal speedService factorRated power
67.9 A ABSEL PRO 1.7.1 / 2005-03-17 ABS reserves the right to change any data and dimensions without prior notice and can not be held responsible for the use of
