operation philosophy wastewater treatement plant

CONTROL PHILOSOPHYns en

TO BE READ IN CONJUNCTION WITH P+ID PLAN (Rev. 02)Co

CARLOW COUNTY COUNCIL

Prepared by: Declan Mc Carthy Checked by: George Henchion Approved by: George Henchion

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny

ot

he

FENNAGH WASTE WATER TREATMENT PLANTru se

.

EPA Export 26-02-2010:18:59:36

Control Philosophy

1/28

TABLE OF CONTENTSPage No. PRELIMINARY I. II. III. Over view....................................................................................................................... 3 Abbreviations List........................................................................................................... 5 Tags and codes in P+ID plans ....................................................................................... 6

IV. Alarms............................................................................................................................ 7 Treatment Plant 2. 3. 4. 5. 6. 7. 8. 9. Forward Feed Pumping Station.................................................................................... 11 Storm Tank .................................................................................................................. 13 Aeration Tank............................................................................................................... 15 Clarifier and RAS/ WAS Pumps ................................................................................... 17 Sludge Holding Tanks (SHT)........................................................................................ 20 Tertiary Filter Feed Sump............................................................................................. 21 Final Effluent P.S ......................................................................................................... 26Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he

1.

Inlet Works ..................................................................................................................... 8ru

Tertiary Treatment Filter............................................................................................... 23

10. Ferric Dosing................................................................................................................ 28

Fennagh WWTP Ref No. 1728

May 2008

se

.

Rev. 01

EPA Export 26-02-2010:18:59:36

Control Philosophy

2/28

REVISION TABLEIndex Draft Rev. 1 Date 07 /2007 05/ 2008 Modification First Issue Tertiary Filter Written D.C D.M.C Design App. Contract Eng. App. Client App.

The process control description is based on the following P+ID drawing:Drawing No. 107417-501 Title / description P&ID Fennagh Waste Water Treatment Plant Revision 2 Date 06/ 2008


Co

ns en

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyMay 2008

ot

he

ru

se

.

Rev. 01

EPA Export 26-02-2010:18:59:36

Control Philosophy

3/28

I.

OVER VIEW

The existing waste water treatment plant at Fennagh Co. Carlow is being upgrade to treat waste water from a population equivalent of 1500. The treated waste water will be pumped to the River burren some 1600m away.

a.

Waste Water Treatment Plant

Waste water enters the treatment plant from the existing local sewer network. The incoming waste water passes through a mechanical spiral screen where solid non-biodegradable objects are removed from the incoming flow and transferred to a waste skip. A sampler automatically collects samples of the incoming waste water for analysis. of the grit chamber. Periodically grit is removed to a classifier where it is dewatered and The waste water gravitates to the forward feed pumping station from where it is pumped to the aeration tank by 2 No. D/ S submersible centrifugal pumps. During storm conditions, flows in excess 11.7 l/s (3 x DWF) overflow the pumping station to the storm tank (Existing aeration tank). If the incoming flows exceed the capacity of the storm tank the excess flows overflow to the nearby stream.Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ru se .

Following the spiral screen the flows gravitate to the grit trap where grit settles to the bottom compacted prior to disposal into a skip.otMay 2008

The contents of the storm tank are pumped back to the forward feed pumping station by 2 No. D/ S pumps at a rate of 5 l/s via a DN100 pipe when storm conditions recede. Oxygen is introduced to the aeration tank by a fixed film aerator on a VSD drive. The drive is controlled by a dissolved oxygen probe located in the tank. Ferric Sulphate is dosed into the inlet pipe to the aeration tank to reduce Phosphorus levels. The effluent flows from the aeration tank to the clarifier. A rotating half bridge cause the sludge to settle to the bottom of the tank where it is pumped to the sludge holding tanks as WAS or returned as RAS to the aeration tank. Clarified effluent overflows a weir in the clarifier and flows by gravity to the tertiary filter feed pumping station. The clarified effluent is pumped to the tertiary filter for final treatment and gravitates to the final effluent pumping station. The tertiary filter is periodically back washed using treated effluent. The wash water is directed back to the forward feed pumping station. A sampler automatically collects samples of the treated effluent for analysis. The treated effluent is pumped to the Burren river at a rate of 13.75 l/s via a DN150 rising main.


he

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

4/28

b.

Waste Sludge

Scum from the clarifier and WAS is stored transferred to the sludge holding tanks. Supernatant is automatically decanted off at a high level and flows to the forward feed pumping station. Settled sludge is periodically removed from the tanks by a road tanker. A flow meter on the bauer connection pipe monitors the sludge removed from the tanks.


Co

ns en


ot

he

ru

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

5/28

II. ABBREVIATIONS LIST

AB = Air Blower B = Bin / Skip BV = Butterfly Valve CO = Compressor D/S = Duty / Standby DO = Dissolved Oxygen DWF= Dry Weather Flow FEPS = Final Effluent Pumping Station FFPS = Forward Feed Pumping Station GV = Gate Valve M = Motor P = Pumpto f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyMay 2008

LS = Limit Switch

P&ID = Process & Instrumentation Diagram PLC = Programmable Logic Controller PS = Position Switch SA = Sampler SC = Screen SHT = Sludge Holding Tank SV = Solenoid Valve US = Ultrasonic Level Sensor VSD = Variable Speed Drive WAS = Waste Activated SludgeCo


ns en

RAS = Return Activated Sludge

ot

he

ru

se

.

FM = Flow Meter

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

6/28

III. TAGS AND CODES IN P+ID PLANS

Tags for equipment instruments are specified as follows:

01Unit No. (e.g. inlet works, pumping station)

SVInstrument / equipment (see note 1)

05Instrument number. / equipment

E R --

Existing Replaced New

Letter codes for identification function of plant / equipment instruments as follows:Letter B C F I K L M R P Q S T X Z First letter --Succeeding letter(s) Display of state (e.g. motor running) Controlling

Level Moisture or humidity --


Time or time programme

ot

he Co ns en

--

ru

se

Flow

-Indicating ---Recording --Switching Transmitting -Emergency of safety acting

Pressure (analysis, concentration, conductivity, etc.) Quality Speed Temperature On/Off --

Additional specifications (used as first letter; OC = Open / Close

In case of 2 or more succeeding letters, they will be placed one after the other in the sequence I-R-C-T-Q-S-Z-A-B. Note 1: For explanation of tags / symbols, please refer to Process and Instrumentation Diagram Details plan.


May 2008

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

7/28

IV. ALARMS

Priority 1 Event Locally displayed at control panel. Priority 2 Attention (High level detected) Caution Alarm raised locally and at the county councils head office.ru se .

Urgent (Over flow, pump fail to start, etc)

Alarm raised locally and at the county councils head office.

Where duty / standby pumps are installed. If the duty pump fails to start, the standby pump automatically becomes the duty pump. A priority 2 alarm is raised. All electrical equipment and instruments are wired to the control panel (PL-01) located in the control house.Co ns en



Priority 3

otMay 2008

he

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

8/28

1. INLET WORKS 1.1. Process Description

Inlet screening Flow enters the inlet works in a gravity 225 sewer from the local area. The spiral screen & compactor (01-SC01) is automatically controlled on a level-time basis. Control process is detailed as follows:

A high level to be set during commissioning (500 mm variable) is detected by (01US01), located prior (01-SC01).ru

cleaned by a brush attached to the conveyor spiral. Screenings are compacted in the compaction zone and binned into a wheelie bin. Drained liquid is diverted downstream of (01-SC01).

(01-SV01) (Lower washing valve) starts with (01-SC01) and is controlled on a time basis (2 seconds running / 5 seconds pause) while (01-SC01) is running.ns en

(01-SV02) (compaction zone cleaning valve) starts with (01-SC01) as well, and it is 120 seconds running time of (01-SC01).Co

controlled on a time basis while (01-SC01) is running (5 seconds running after every

(01-SC01) and solenoid valves stop 0-5 minutes (to be set during commissioning) after a low level is detected by (01-US01) (100mm variable), or on a time basis if (01SC01) is continuously running after a period based on screen manufacturers recommendations.

Wash water for the screen will be supplied by 2 No D/ S wash water supply pumps (07-P03/ P04) located at the tertiary filter feed sump.. Y type strains 01-YS01/ YS02 will be installed prior to the solenoid valves to prevent dirt particles that affect their functioning. In the event of any kind of failure (power, mechanical, etc), the effluent overflows to the bypass screen (01-SC02), and an overflow alarm is raised. Screening are manually raked and removed by an operator.Fennagh WWTP Ref No. 1728 May 2008 Rev. 01


ot

Solid matter is removed by the conveyor spiral from the separation screen, which is

he

se

An enable signal is triggered from panel (PL-01) and (01-SC01) is activated..

EPA Export 26-02-2010:18:59:37

Control Philosophy

9/28

The sampling system (01-SA01) will have variable set point controls which will be calibrated during commissioning. The system is equipped with time and flow proportional manual overrides. The sampler is controlled from its local panel. Screened effluent passes through a 225mm UPVC pipe to the grit trap. Grit trap. The grit trap is a vortex type. Grit settles to the bottom of the chamber and is lifted on an intermittent basis by means of air flow from 01-AB01 to the bottom of the chamber via 2 No air pipes. The settle grit is removed in a two stage timed process. The wash and the lift sequence arehe ru

described as follows (the following time periods may need to be adjusted on commissioning):to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyMay 2008

1.2.

Control Philosophy

(Levels to be set during commissioning)

1.2.1.

(Automatic Operation)ns en

discharge pipe). A 0-24 hour timer is used to initiate the process timer. (01-AB01) and (01-SC04) starts running for 0-60 minutes. When (01-AB01) is started, air is diverted to the bottom of the chamber where it agitates the settled grit locally, causing it to be suspended in solution. Grit is transferred to the grit classifier (01-SC04) and discharged into a bin after being drained. Drained liquid is diverted to the grit trap inlet pipe. (01-3BV01) into the discharge pipe creates an air lift pump as follows: o o o o After 0-10 minutes, the 3-way valve changes to the air lift position. After 0-10 minutes, the 3-way valve reverts to the air wash position. After 0-10 minutes, the 3-way valve changes to the air lift position. After 0-10 minutes, the 3-way valve changes to the air lift position. 01-AB01 stops.


Co

(01-AB01) and (01-SC04) are off and (01-3BV01) is in air position (i.e. external to the

ot

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

10/28

o

At the end 01-AB01 stops, 01-3BV01 set to air wash position, and (01-SC04) stops 5 minutes after (01-AB01).

The cycle frequency is variable and will be determined during commissioning and adjusted as appropriate by operator. Flow from the grit trap is directed to the forward feed pumping station.DRIVES PLANT Tag Description Control Control parameter Comment Duty Mechanical spiral 01-SC01 screen and compactor 01-US01 Timer Level Time Controls at PL-01 An ON signal controls wash water pumps (07-P03/ P04) Bypass screen Duty Controls at PL-01 Lower washing valve Compaction zone cleaning valve Duty Controls at PL-01 Duty Controls at PL-01

01-SC03 01-SC04 01-SV01 01-SV02

Grit trap Grit classifier Solenoid valve Solenoid valve

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyTimer Time Timer Timer Time Time

01-3BV01

3-way actuated valve

Co

ns en

01-AB01

Air blower

Timer

Time

Timer

Time

INSTRUMENTATION Tag 01-US01 Description Ultrasonic level sensor Sampler Signal Analogue Alarm High level Comment LIC Controls 01-SC01 QIR Controlled by local timer

01-SA01


ot-

01-SC02

Manual screen

Manual

heMay 2008

ru

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

11/28

2. FORWARD FEED PUMPING STATION 2.1. Process Description

The pumping station receives flows from: Inlet grit trap via a 225 pipe Waste water from the control house via a 100 pipe Supernatant return flows via a 150 pipe Backwash flows from the tertiary filter via a 225 pipe Return flows from the storm tank via a 100 pipe The pumping station consists of 2 No. submersible centrifugal pumps (02-P01 & 02-P02)he ru Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny otMay 2008

located in the wet well.

(02-P01 & 02-P02) each have a capacity of 11.70 l/s and operate on a D/ S basis. Automatic pump control is obtained by use of an ultrasonic level sensor in the wet well (02US01) which transmits a 4-20Ma signal to (PL-01).

Pump controls allows for the automatic changeover of duty pumps on a time basis set out at 24 hours initially. The forward flow rate to treatment is monitored and recorded by flow meter (04-FM01), which transmits a 4-20 ma signal to (PL-01). The forward flow rate is restricted to 11.7 l/s. In the event of the incoming flows exceeding the capacity of the forward feed pumps over an extended period i.e. storm conditions, the excess flows overflow to the storm tank (existing aeration tank).

2.2.

Control Philosophy



se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

12/28

2.2.1.

Automatic Operation

Forward Feed Pumps (02-P01/ P02) In the event of a high level as monitored by level sensor (02-US01), duty pump starts. In the event of a low level as monitored by level sensor (02-US01), duty pump stops. If the level in the pumping station increases as monitored by (02-US01) the duty pump ramps up. If the level in the pumping station decrease as monitored by (02-US01), duty pump ramps down. In the event of a high high level as monitored by (02-US01) an alarm is raised at the local control panel and at the County Councils head office. Excess flows over flow to the storm tank. If the duty pump fails to start the standby pump becomes the duty pump. A priority 2 alarmotDRIVES PLANT Tag 02-P01/ P02 Description Foul Pumps

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyControl

Control parameter

he

is raised.

ru

se

.

Comment Duty/ Standby VSD Controls at PL-01

02-US01 / 04-FM01

Level / Flow

INSTRUMENTATION Tag 02-US01 Description Ultrasonic level sensor Signal Analogue Alarm Overflow level Comment Controls 02-P01/ P02, 03P01/ P02


Co

ns en

May 2008

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

13/28

3. STORM TANK 3.1. Process Description

The storm tank receives overflows from the forward feed pumping station during storm conditions (incoming flows >11.70 l/s) via a 225 overflow pipe. Once storm conditions have subsided the storm water is pumped back to the forward feed pumping station by storm return pumps (03-P01 & 03-P02) at a rate of 5l/s. These pumps are controlled by the level sensor (03-US01) located in the storm tank and level sensor (02US01) located in the forward feed pumping station and operate on a duty/ standby basis. If the capacity of the storm tank is reached the incoming flows overflow a weir and discharge The ultrasonic level sensor (03-US01) mounted in the tank records the flow rate over the outfall weir in the tank.to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyMay 2008

3.2.

Control Philosophy


In the event of a high level detected in the storm tank as monitored by level sensor (03US01) and a low level detected in the forward feed P.S as monitored by (02-US01) the duty storm pump starts. In the event of a high level detected in the forward feed P.S as monitored by (02-US01) the duty storm pump stops. In the event of a low level detected in the storm tank as monitored by level sensor (03US01) the duty storm pump stops. If the duty storm pump fails to start the assist storm pump starts. A priority 2 alarm is raised/ The duty pump is alternated after every cycle.


Co

3.2.1.

Automatic Operation

ns en

ot

he

ru

se

to the nearby stream.

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

14/28

DRIVES PLANT Tag 03-P01/ P02 Description Storm Return Pumps Control 03-US01 02-US01 Control parameter Level / Flow Comment Duty/ Standby Controls at PL-01

INSTRUMENTATION Tag 03-US01 Description Ultrasonic level sensor Signal Analogue Alarm Overflow level Comment LIRC (Overflow monitoring) Controls 03-P01/ P02


Co

ns en


ot

he

ru

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

15/28

4. AERATION TANK 4.1. Process Description

The system consists of an aeration tank, aeration wheel and an aeration wheel drive motor (04-M01). The aeration tank receives incoming flows from the forward feed pumping station via a DN100 pipe and RAS flows from the clarifier via a DN150 pipe. The Aerator wheel is powered by a drive motor (04-M01) using a chain a sprocket transmission. The drive motor is controlled by DO probe (04-DO01) located in the tank, which is maintained within an operating band between 2 and 3 mg/l (levels to be adjusted during commissioning). The drive motor ramps up/ down in relations to the DO level of the activated. Ferric sulphate is dosed in to the inlet pipe from the forward feed pumping station. The ferric sulphate reduces the phosphorus level in the process by causing the phosphorus to coagulate and settle as sludge in the clarifier. tank through a 250 mm pipe. 4.2. Control Philosophy Aerated liquid overflows a weir on the outlet side of the tank and gravitates to the clarifierto f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se

waste water. If (04-DO01) records either a high or low oxygen level, a priority 1 alarm will be.

4.2.1.

Automatic Operation

Aeration Wheel Drive Motor (04-M01)

In the event of low dissolved oxygen levels as monitored by (04-DO01), the motor ramps up. In the event of high dissolved oxygen levels as monitored by (04-DO01), the motor ramps down. At a high - high dissolved oxygen level the motor stops. The drive motor is also started by the PLC timer if it has not operated with in a set time (60 minutes). On start up the drive motor is configured to operate at full speed for 10 minutes.


Co

ns en


May 2008

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

16/28

DRIVES PLANT Tag Description Aeration wheel drive motor Control 04-DO01 Timer Control parameter Dissolved oxygen Timer Comment Duty VSD Controls at PL-01

04-M01

INSTRUMENTATION Tag 04-DO01 Description Dissolved oxygen Signal Analogue Alarm High / Low Comment Controls 04-M01 FIRC 04-FM01 Flow meter Analogue Controls 05-P02/ P03, 10-P01/ P02, 02-P01/ P02


Co

ns en


ot

he

ru

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

17/28

5. CLARIFIER AND RAS/ WAS PUMPS 5.1. Process Description

The system consists of a clarifier tank, 2 No. Sludge pumps mounted on a RC plinth (05-P02 & 03), a scum pump (05-P01). Flow from the aeration tank enters the clarifier and is directed to the central diffusion drum, which is designed such that flows will discharge radially at the bottom. As settlement occurs the clarified effluent rises and overflows the peripheral weir. The heavier activated sludge settles to the floor of the tank. The rotating half bridge is supported on a steel tripod and at the perimeter. The drive unitru se

(05-M01) is fitted to the wheel at the perimeter of the bridge and is constantly rotating. The rotating bridge is fitted with a series of floor scrappers which continuously direct the settled sludge to a central hopper. At the base of the hopper is the sludge draw off pipe which is directed to the RAS / WAS pumps.to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he .

Sludge pumps (05-P02/ P03) each have a capacity of 11.7 l/s, operate on a D/S basis, and are controlled by VSDs which ramp up/ down in relation to the incoming flow to aeration tankCo

as monitored by flow meter (04-FM01). Pump controls allow for the automatic changeover of duty pumps on a time basis set out at 24 hours initially. If duty pump does not cut-in the standby pump becomes the duty pump. Under normal operation the sludge is returned to the aeration tank as RAS. Periodically the operator directs the sludge to the sludge holding tanks as WAS by manually operating the change over valves. Scum on the surface of the clarified effluent is directed to a scum box by a scraper on the top of the half bridge. The scum is pumped by scum pump (05-P01) to the sludge holding tanks. The pump operates on a duty basis. The pump is controlled by a limit switch (05-LS01) located adjacent to the scum pump.


ns en

May 2008

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

18/28

The limit switch is activated by a striker on the rotating half bridge every complete revolution of the half bridge. Clarified effluent overflows the V-notch weir and flows by gravity to tertiary filter feed P.S.

5.2.

Control Philosophy


5.2.1.

Automatic Operation

Clarifier Scraper Motor (05-M01)

The clarifier scraper motors operate continuously. Scum Pump (05-P01)ru Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyControl On/off 05-LS01 Timer Control parameter On/ Off Position Time

When the position switch (05-LS01) is activated the sludge pump operates for a set period of time.

RAS / WAS Pumps (05-P02/ P03)

The duty RAS / WAS pump operates continuously. In the event of higher incoming flows as monitored by (04-FM01), the duty pump ramps ups.

In the event of lower incoming flows as monitored by (04-FM01), the duty pump ramps down.DRIVES PLANT Tag 05-M01 05-P01 Description Clarifier drive Scum pump Comment Duty Duty Controls at PL-01 Duty/ Standby VSD Controls at PL-01

05-P02/ P03

Sludge pumps

04-FM01

Flow


otMay 2008

he

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

19/28

INSTRUMENTATION Tag 05-LS01 Description Limit switch Signal Digital Alarm Comment P.C Controls 05-P01


Co

ns en


ot

he

ru

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

20/28

6. SLUDGE HOLDING TANKS (SHT) 6.1. Process Description

Flow enters the sludge holding tank from the sludge pumps and the scum box in the clarifier. The contents of the tank are the allowed to thicken through the separation of the clear liquid and sludge by gravity. Clear liquid at the top of the tank overflows the high level decant pipe or is manually decanted at a lower level. This liquor is then returned to the forward feed pumping station. The Bauer coupling at the base of the tank allows for sludge to be removed using a mobile tanker. The bauer coupling line is fitted with a flowmeter (06-FM01) to record sludge flowsruDRIVES PLANT Tag Description -

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyControl -

Control parameter -

ot

he

se

taken from the site.

.

Comment -

Co

Tag 06-FM01

Description Flow meter

ns en

INSTRUMENTATION

Signal Analogue

Alarm -

Comment FIR Records sludge flows


May 2008

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

21/28

7. TERTIARY FILTER FEED SUMP 7.1. Process Description

Clarified effluent enters the tertiary filter feed sump from the clarifier through a DN200mm pipe. The pumping station consists of 2 No. submersible pumps (07-P01/ P02) and 2 No. dry mounted wash water pumps (07-P03/ P04). The wash water pumps supply wash water to the inlet screen at a rate of 4 l/s. Clarified effluent is pumped to the tertiary treatment filter by the 2 No. feed pumps (07-P01/ P02) at a rate of 11.7 l/s. The pumps operate on a duty / standby basis and are controlled by level sensor (07-US01) and by the PLC timer during a back wash cycle. At a high level the pumping station can overflow to the final effluent P.S via a DN 200ru se Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyMay 2008

overflow pipe.ot he

7.2. 7.2.1.

Control Philosophy

Automatic Operation

Tertiary Filter Feed Pumps (07-P01/ P02).

In the event of a high level as monitored by (07-US01), duty pump starts. In the event of a low level as monitored by (07-US01), duty pump stops. If the duty pump fails to start the standby pump becomes the duty pump. A priority 2 alarm is raised. When a backwash cycle is initiated for the tertiary filter, the PLC prevents the filter feed pumps from operating while the backwash cycle takes place irrespective of level in the sump. The duty pump alternates after every cycle.


.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

22/28

Wash Water Pumps (07-P03/ P04). The duty pump is started by an ON signal from the (PLC) when inlet screen (01-SC01) is running. The duty pump is stopped by an OFF signal from the (PLC) when inlet screen (01-SC01) is stopped. In the event of a low level detected in the sump as monitored by level sensor (07-US01), duty pump stops. If the duty pump fails to start the standby pump becomes the duty pump. A priority 2 alarm is raised. The duty pump alternates after every cycle.

07-P01/ P02

Tertiary filter feed pumps


07-US01 PLC

Level Time

ot

Tag

Description

Control

Control parameter

he

ru

DRIVES PLANT

se

.

Comment

Duty/ Standby Controls at PL-01

(Backwash timer)

07-US01 from 01SC01)

Level

07-P03/ P04

Wash Water pumps

(ON signal

Inlet Screen ON signal


INSTRUMENTATION Tag Description Ultrasonic Level sensor Signal Alarm Comment LIC Analogue Controls 07-P01/ P02/ P03/ P04

07-US01


Co

ns en

May 2008

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

23/28

8. TERTIARY TREATMENT FILTER 8.1. Process Description

The tertiary filter consists of: 1 No. Tertiary Filter. 2 No. Filter Feed Pumps (07-P01/ P02) located in the tertiary filter feed sump (See chapter 7). 1 No. Backwash pump (09-P01) located in the final effluent P.S (See chapter 9). 1 No. DN150mm Actuated Ball Valve (08-BV01) located on the filter outlet pipe. 1 No. DN200mm Actuated Ball Valve (08-BV02) located on the backwash waste pipe. 1 No. DN150mm Actuated Ball Valve (08-BV03) located on the filter rinse pipe.he ru se .

Filtering Process

Clarified effluent is pumped from the tertiary filter feed pumping station to the tertiary treatment filter by 2 No. Duty/ Standby tertiary feed pumps (07-P01/ P02) at a rate of 11.7 l/s. As the clarified effluent passes down through the filter, suspended solids in the effluent will During the filtering process actuated ball valve (08-BV01) is in the open position and valves (08-BV02 & 08-BV03) are in the closed position. A sampler (09-SA01) automatically collects a sample of the treated effluent in the final effluent P.S. The sampler is controlled by the PLC timer.Co ns en

be retained in the filter. Following the filter the filtered effluent is directed to final effluent p.s.

Back Wash & Rinse Cycle Periodically the tertiary filter is backwashed (initially set to 4 times/ day) by isolating the incoming flow and pumping filtered water back through the filter by duty pump (09-P01) located in the final effluent P.S at a rate of 47.5 l/s. A back wash only takes place during periods of low incoming flow through the plant. Following a backwash cycle, the filter is rinsed for 30 seconds.



otMay 2008

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

24/28

When a backwash is scheduled by the PLC timer, and a low level detected in the tertiary filter feed P.S as monitored by level sensor (07-US01), the pumps (07-P01/ P02) are stopped and actuated valve (08-BV02) is opened and valve (08-BV01) is closed. Pumps (07-P01/ P02) are prevented from operating during a backwash even if a high level is detected in the filter feed p.s as monitored by (07-US01), Backwash pump (09-P01) starts for a time (t1) initially set to 180 seconds. Filtered water is pumped back through the filter and gravitates to the FFPS via a 225mm pipe. After time (t1) backwash pump (09-P01) stops. The filter is allowed to settle for a time (t2) set to 60 seconds. After time (t2) valve (08-BV02) closes and valve (08-BV03) opens for the rinse cycle. After the duty filter feed pump operates for time (t3) initially set to 30 seconds, valve (08BV01) opens and valve (08-BV03) closes. Back wash cycle complete.ot to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyMay 2008

8.2.

Control Philosophy

(All times to be set during commissioning)

8.3.

Automatic operation

Actuated valve (08-BV01)Co

During normal operation of the filter, actuated valve (08-BV01) is in the open position. When a back wash cycle is initiated by the PLC the valve closes. The valve remains closed until the backwash and rinse cycle is complete. When the rinse cycle is complete the valve opens. Actuated valve (08-BV02)

During normal operation of the filter, actuated valve (08-BV02) is in the closed position. When a back wash cycle is initiated by the PLC the valve opens. The valve remains open until the backwash cycle is complete (270 seconds variable).


ns en

he

ru

se

.

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

25/28

Actuated valve (08-BV03) During normal operation of the filter, actuated valve (08-BV03) is in the closed position. Following a backwash and filter settling time of 1 minute the valve opens. The valve remains open for 30 seconds while the duty pump (07-P01/ P02) in the FEPS operates. The rinse water is directed to the FFPS. After the rinse cycle the valve closes. Backwash Pump (09-P01) (See chapter 9)

08-BV01

Actuated valve (Filter outlet) Actuated valve (Backwash outlet) Actuated Ball valve (Drain)


PLC

(Back

ot

Tag

Description

Control

Control parameter Time

he

ru

DRIVES PLANT

se

.

Comment Duty Controls at PL-01 Duty Controls at PL-01 Duty Controls at PL-01

wash)

08-BV02

PLC (Back wash)

Time

08-BV03

PLC (Back wash)

Time

INSTRUMENTATION Tag Description Signal Alarm Comment -


Co

ns en

May 2008

Rev. 01

EPA Export 26-02-2010:18:59:37

Control Philosophy

26/28

9. FINAL EFFLUENT P.S 9.1. Process Description

Flow enters the pumping station through a 150mm pipe from the tertiary filter and is pumped approximately 1600m to the Burren River. Rising main pumps (09-P02 & 09-P03) each have a capacity of 13.75 l/s and operate on a D/ S basis. The sampling system (09-SA01) operates on variable set point controls which will be calibrated during commissioning. The system is equipped with time and flow proportional manual overrides. The sampler is controlled from its local panel.

9.2.1.

Automatic Operation

(Levels to be set during commissioning) Backwash Pump (09-P01)Co

The pump is controlled by an ON signal from the PLC during a back wash cycle. The pump runs for 180 second as part of the back wash cycle. In the event of a low level detected in the sump as monitored by level sensor (09-US01) the pump stops. The pump is prevented from running when the filter supply pumps (07-P01/ P02) are operating. Rising Main Pumps (09-P02/ P03) During a back wash cycle the pumps are prevented from operating to ensure sufficient level in the sump for a back wash cycle. In the event of a high level detected in the sump as monitored by level sensor (09US01) the duty pump starts.Fennagh WWTP Ref No. 1728 May 2008 Rev. 01

ns en


ot

he

ru

9.2.

Control Philosophy

se

.

EPA Export 26-02-2010:18:59:37

Control Philosophy

27/28

In the event of a low level detected in the sump as monitored by level sensor (09-US01) the duty pump stops. If the duty pump fails to start the standby pump becomes the duty pump. A priority 2 alarm is raised. The duty pump alternates after every cycle.

DRIVES PLANT Tag Description Control 09-US01 09-P01 Backwash pump PLC (Backwash timer) 09-US01 (Backwash timer) Time Level Time Duty Controls at PL-01 Control parameter Comment

ru

09-P02/ P03

Rising main pumps

se

PLC

Level


INSTRUMENTATION Tag 09-US01 09-FM01 09-SA01 Description Ultrasonic Level

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nySignal Alarm

ot

he

.

Comment LIC Controls 09-P01/ P02/ P03 FIR QIR Timer controlled

Analogue

Co

sensor Flow meter Sampler

ns enAnalogue

-


May 2008

Rev. 01

EPA Export 26-02-2010:18:59:38

Control Philosophy

28/28

10. FERRIC DOSING The Ferric dosing unit consist of a ferric dosing tank and 2 No. dosing pumps (10-P01/ P02). The ferric solution is pumped at a rate of 0-5 l/hr to the inlet to the aeration tank by means of dosing pumps (10-P01/ P02). The Phosphate level is reduced in a chemical reaction and settles as sludge. The dose rate is set manually by the operator based on the incoming effluent. Once the dose rate is set the pumps are controlled automatically based on the incoming flow to the aeration tank as monitored by flow meter (04-FM01).

PLANT Tag10-P01/ P02

DescriptionDosing pump

Control04-FM01

Control parameter

Comment Duty / Standby Controls at PL-01

INSTRUMENTATION Tag Description -

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nySignal Alarm

ot

he

Flow

ru

se

.

Comment -

-


Co

ns en

May 2008

Rev. 01

EPA Export 26-02-2010:18:59:38

Co ns en t of co For py in rig sp ht ect ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38

Co

ns

en t

of

co For py in rig sp ht ect ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny

ot

he ru

se .

EPA Export 26-02-2010:18:59:38

Section C1

The village of Fennagh is serviced by a waste water drainage system and wastewater treatment works (WWTW). The original WWTW was constructed in the early 1970s and was designed for a population equivalent of 180PE. The treatment works consisted of an extended aeration treatment process with settlement and sludge drying beds. The original secondary settlement tank was replaced by a GRP hopper bottomed secondary settlement tank with lamella plates in the mid 90s, as there was hydraulic overloading. There was also disused sludge drying beds. By 2005 the contributing load to the WWTW was determined as 390PE and the WWTW was significantly overloaded, with poor treatment capacity. In 2008 Carlow County Council replaced the old WWTW with a new treatment works with a capacity of 1,500 pe, this works was put into use in Dec 2008 and is being commissioned at present. The new works consists of the following: Inlet 6mm screening and de-gritting on all flows, including storm flows. Storm water holding of 3DWF for 2 hours, providing settlement and a baffled outlet for overflow to the Burren Tributary, with held storm water returned for treatment Flow measurement of flow to full treatment and storm overflow. Secondary treatment using aeration and settlement. Tertiary treatment using a sand filtration system Phosphorous reduction using ferric dosing Sludge holding and thickening tank with flow measurement for sludge removed from site.Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

The treatment standards for the new works are: BOD TSS Amm N Total P 10mg/l 10mg/l 5mg/l 1mg/l 95%ile 95%ile 95%ile 95%ile

The old Fennagh WWTW discharged into the Burren Tributary which flows to the Burren River, the confluence with the Burren is about 1.5 km east of the WWTW. The new works will discharge into the Burren River via a new pumping station. The Burren Tributary was considered for discharge however as the 95%ile flow, estimated by the EPA, is 11l/s and the design load for Fennagh is 1,500 pe the dilution in the Burren Tributary was considered to be marginally unacceptable as the BOD in the stream as a result of the works would be about 3.2 mg/l during low flows. Therefore it was decided to pump the final effluent to the Burren River itself as this would allow for future expansion of the works when required.

1EPA Export 26-02-2010:18:59:38

The 95%ile flow in the River Burren at the discharge point is estimated at about 100 l/s, providing dilution of almost 30:1 and the BOD in the river as a result of the works would be about 0.85mg/l for a discharge standard of 25 mg/l at design loading and would be approximately 0.35mg/l for the consent standard of 10mgBOD/l. The consent standard for the Fennagh WWTW was set to 10:10(BOD:TSS) as there is a water abstraction point about 15km downstream of the works on the Burren River(Sion Cross). The site layout for Fennagh (drawing C2) shows the location of the final effluent pumping station and the storm water overflow, and drawing C1 is a schematic of the WWTW, drawing C3 shows the location of the final effluent discharge point on the River Burren. The treatment works has been operational since Dec 2008 is going through a commissioning period at present.

Co

ns en


ot

he

ru

se

.

2EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38

Co n se nt o f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38


EPA Export 26-02-2010:18:59:38

Biological Wastewater Treatment with the STHLERMATIC-AerotorProven Aeration System - Combination of Activated Sludge and Fixed Film nearly 30 years of experience, well-engineered, rugged construction

Pipe-Aerotor (RR)oxygen input at the spillway

rotationangle of opening oxygen supply of the fixed film

intake of atmospheric air forced conduction and compression of the trapped air

wastewater filling the pipe

running in wastewater aeration from release of trapped air oxygen transfer at the transition zones air / water

Process Description

The wastewater treatment unit combines the advantages of the activated sludge process with those of fixed film in a unique design. The system works like a conventional activated sludge system with activated biological sludge in the mixed liquor and a return sludge circuit. This process is enhanced by working with higher concentrations of suspended sludge as a consequence of the low sludge volume index and by the additional effect of the fixed film. The STM-AEROTOR is designed as a rotor equipped with pipes created by media discs. By rotating the rotor by a motor above water level, surface air is captured by the special design of the fixed film media and consequently the microorganisms in the basin are supplied with oxygen. As soon as a pipe of the rotor emerges above water level during rotation, the mixed liquor inside the pipes flows out. By this it is firstly aerated at the spillway. The pipe will then be filled with atmospheric air. The necessary oxygen for the fixed film dissolves on the wet surfaces of the media discs. During the downward rotation the air is trapped in the pipes and forced into the mixed liquor. Moving downwards to the bottom of the biotank the air is compressed more and more. The compressed air is contacting all inner surface areas of the disc during rotation. The fixed film is supplied with oxygen during the entire rotation in the atmosphere and in the mixed liquor. During rotation parts of the air can escape. The bubbles travelling to the centre of the rotor result in a homogeneous mixing of the biotank. A circular stream in the centre of the rotor increases significantly the detention time of the bubbles so that consequently the oxygen transfer time is much larger compared to a conventional diffuser aeration system. The activated sludge in the mixed liquor is always effectively supplied with oxygen. The STM-AEROTOR is a high-capacity oxygen supply mechanism designed to satisfy high demands while using less power. Zones with different oxygen concentrations are formed in the basin. These zones influence with advantage the processes of nitrification / denitrification and increased biological P-elimination. The system can be flexibly designed and controlled adapted to varying requirements - by appropriately sizing the volume of the biotank - by changing the speed of the rotor (frequency controlled motor) - by adding additional media pipes and scraper blades

Co

ns en


ot

he

scraper blade

ru

se

.

alternative: additional pipe

EPA Export 26-02-2010:18:59:38

Choosing larger dimensions of the biotank equipped with the same aerotor (expanding the biotank volume) results in a larger treatment volume. Consequently the anoxic environmental zones are increased so that simultaneous denitrification takes place. These anoxic zones are mainly beneath and under the aerotor. At the tank bottom the concentration of the mixed liquor increases too as a result of first sedimentation in consequence of the low sludge volume index created by the fixed film. Here all oxygen is consumted and a anaerobic zone is created so that an increased biological phosphorus elimination (luxury P-uptake) is additionally achieved. To that the sludge in the anaerobic zone becomes septic a scraper and / or additional pipes are to be installed so that the sludge is mixed and get back into the aerated turbulence of the aerotor.

aerobic zone

circular stream

fluctuation zone: aerobic / anoxic

air coming out

anoxic / anaerobic zone

DesignThe basic construction of the rotor is a central shaft and a steel cage structure which transfers forces directly to the bearings. The central shaft is significantly less stressed.

Pipe-Aerotor

The pipes are formed by joining discs into cylinders. Several of these pipes are specially arranged to create the rotor. The pipes form hollow chambers which serve both to input oxygen and as fixed film growth surfaces. The discs consist of durable polypropylene. The distance between the discs is 20 mm. Each rotor can be fitted with additional scrapers and pipes.

Co

ns en


ot

he

ru

se

.

EPA Export 26-02-2010:18:59:38

Wide Applicability- treatment of domestic and industrial wastewater - partial or basic treatment, advanced treatment with nitrification/denitrification, and increased biological P-elimination - new plants, expansions, and retrofits of existing plants - single home treatment units - containerized and modular plants - large treatment plants in single and compactly designed concrete tanks - separate aerobic sludge stabilisation - treatment of septic and faecal sludges - treatment of liquid manure and other wastewaters from livestock

Advantages

The Sthlermatic-AEROTOR

Using modular construction, it is possible to adapt the process to the requirements of every application or loading. The simple and ruggedly designed construction requires less maintenance. The selected materials guarantee long service life. Only half the power of a conventional diffused-air aeration system is required.

High Process Stability

Highest process stability is achieved through a wide spectrum of microorganisms in the mixed liquor and the fixed film. Oxygen supply is always guaranteed even with increased effluent standards or during excessive loadings.

Smaller Footprint and VolumeThe high efficiency and the compact design reduce the needed footprint to nearly 50% of conventional process with the same efficiency.

Low Noise and Odour-FreeFormation of aerosols and emission of odours are minimized due to the special design of the system. The low speed of the rotor requires no additional noise control measures.

Improved Sludge QualityLess production of waste sludge by the fixed film component, significantly lower sludge volume index, and best sludge settling and dewatering characteristics are the main attributes of the STMAEROTOR-System.125% 100%100% 100% 75% 52% 45% 50% 25% 0% Sthlermatic Activated Sludge SBR 78% 112%

Co

ns en


The STM-system is very capable and reliable under even the highest demands. By optimally combining activated sludge with fixed film, required effluent concentrations are safely and steadily achieved, both for basic and for advanced treatment.

Total Volume Energy kWh/d

ot

he

ru

Process Stability

se

.

EPA Export 26-02-2010:18:59:38

Details of Proposed Treatment System The Stahlermatic (STM) process is an advanced process incorporating a combination of fixed film and activated sludge growth mechanisms in a single basin. Each of these processes has their own advantages. Historically, fixed film systems such as RBCs are simple and stable with low maintenance. The activated sludge process is a more flexible process and will produce a higher quality of final effluent. The STM plant combines the advantages of both processes. The system works like a conventional activated sludge system with activated biological sludge in the mixed liquor and with a return sludge circuit to increase the concentration of the suspended sludge. The efficiency of the typical activated sludge system is enhanced by working with higher concentrations of the suspended sludge than usual and by the additional effect of the biofilm. The powerful effects of the STM system results from this significant increase of the total biomass concentration. The STM-system can be used in the same way and with the same process combinations as a conventional activated sludge system. The immersed STM-contact aerators or contactors are attached radially around a large center shaft. The plates and discs in the contactors are formed with a special surface profile. The process uses only a single mechanical drive system. A geared motor above water level rotates a contactor. Through it atmospheric air is dissolved in the mixer liquor to supply the activated sludge sufficiently with oxygen. The biofilm on the contact aerators is supplied with oxygen when the contactors emerge above water level. During the downward rotation the air is trapped in the chambers created by the plates and discs of the contactors, and forced into the water. As it is conducted to the bottom of the biotank the air is compressed more and more. In principle the biofilm is supplied with oxygen during the total rotation of the contactor, in the atmosphere and in the mixed liquor. The trapped air is partially used to reduce the power requirements by buoyancy so that the power consumption of the system is relatively low. In effect, the contactor acts an extremely efficient aerator. The oxygen supply for all microorganisms is ensured by rotating the contactors slowly. As soon as a segment emerges with its chambers above water level during this rotation, the mixed liquor inside the chambers runs out. The segment will then be filled with atmospheric air. The necessary oxygen for the biological wastewater treatment dissolves on the wet surfaces of the fixed biofilm. Because this very large surface area is directly affected by the partial pressure of the air, an immediate saturation of the oxygen concentration is achieved. By diffusion oxygen penetrates into the biofilm due to the concentration gradient. While the segments are submerging again into the mixed liquor the air cannot escape and is trapped in the segments. As the contactor rotates, the air is forced conducted to the bottom of the biotank. In this way the air is compressed more and more. During the downward rotation some of the air can escape and is channelled in the form of middle fine and fine bubbles to the centre of the aerator caused by the shape of theCo ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:38

segments. Finally the bubbles reach the water surface through the opposite segments. This turbulence combined with the rotation of the wheel effects a homogeneous mixing of the biotank. The activated sludge in the mixed liquor is always sufficiently supplied with oxygen. During the upward rotation of the contact aerator the partially air filled segments provide buoyancy and tremendously reduce the propulsive power required for rotation. Only a few moments before emerging again the rest of the air is released into the water. The fixed film on the surface areas within the segments are supplied with oxygen up to saturation while open to atmosphere at the start of the cycle. The forced conducted air is contacting all inner surface areas of the plates or discs in the segments during rotation. By this all microorganisms of the fixed film are sufficiently supplied with oxygen during rotation in the mixed liquor too.

Co

ns en


ot

he

ru

se

.

EPA Export 26-02-2010:18:59:39

Characteristics of the STM ProcessSuitable for Population Equivalents of 50 PE to 5,000. ( can go to 25,000PE ) Complete Waste Water Treatment System that needs no chemicals Utilises a very small space. Totally Automatic. Normally no personnel required on site. Combines the process of fixed film contactors and Activated Sludge treatment. Low Cost, saves over 50% of the power requirement on a conventional plant. Low Maintenance (components have 20 year plus life) Automatic Nitrification and de-Nitrification, Automatic Oxygen level control. Simple to Install. Simple and robust construction. Replaces the technology of Rotating Biological Contactors. No odours of any kind. Larger tank operational volume to conventional RBC's Huge area for the growth of active biofilm. Constant mixing without additional equipment. Higher than normal concentration of the suspended sludge biomass. High process stability. Optimal Oxygen transfer Efficiency Can be containerised, mobile Silent operation Better sludge quality giving better dewatering capability Over 500 installations world-wide. Patented and licensed in 66 Countries.to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

For an Equivalent volume of waste water to be treated : Compared to the Sequence batch reactor process (SBR) the Stahlermatic consumes 67% less energy and occupies 26% less volume area. Compared to a conventional Activated sludge system the Stahlermatic consumes 55% less energy and occupies 48% less volume area. Compared to the other two processes the Stahlermatic provides: A lower required treatment volume More advanced degradation of carbon elements More advanced nitrification More advanced de-nitrification More advanced biological P elimination Simultaneous stabilisation of the sludge. The system can handle storm flows and dry weather flows equally well, with automatic DO sensing to speed up or slow down process. The Stahlermatic can work with or without a final clarifier, (depending on plant size)Co ns en

To summarise, this system has significant advantages over comparable processes. It has lower investment costs, lower running costs, and a complete absence of the use of any chemicals. It has a very small footprint. e.g. a 3000PE plant is just 1000m2 including inlet screens, gravel traps, the Stahlermatic system and final clarification.

EPA Export 26-02-2010:18:59:39


EPA Export 26-02-2010:18:59:39


EPA Export 26-02-2010:18:59:39

Section C2 There are no pumping stations in the Fenagh catchment and there are no overflows in the drainage network other than at the new wastewater treatment works. At the treatment works there is a storm overflow discharge, the final effluent is pumped to the primary discharge at Ullard Bridge. The final effluent (3DWF) is tertiary treated to the following standard. BOD TSS Amm N Total P 10mg/l 10mg/l 5mg/l 1mg/l 95%ile 95%ile 95%ile 95%ileru se ot he .

The storm water is treated in the following manner:to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny

When flows exceed the capacity of the forward feed pumps, the storm pumps kick in and pump the storm water unto the storm tank. The storm pumps are sited in a sump and the two pumps operate on a duty/standby basis. In the case of one pump tripping out the other pump cuts in. All flows are screened (6mm) and de-gritted and then any storm water flow above 3DWF(35m3/hr) is overflowed to the storm water holding tank. This tank has a storage capacity of 2 hours at 3DWF which equates to a storage volume of over 80m3. If the tank fills up then settled, screened and de-gritted storm water is overflowed to the river, via a baffled overflow pipe, this flow is measured and recorded. The held storm water in the tank is returned to the forward feed pumping station and provided with secondary treatment, as inlet flows permit, this is managed by the operator. The treated storm water is over flowed to the Burren Tributary at the boundary of the WWTW site, as after 2 hours holding there would be higher flow conditions in the stream providing sufficient dilution.Co ns en

1EPA Export 26-02-2010:18:59:39


EPA Export 26-02-2010:18:59:39

SITE SYNOPSIS

SITE NAME: RIVER BARROW AND RIVER NORE SITE CODE: 002162

The site is a candidate SAC selected for alluvial wet woodlands and petrifying springs, priority habitats on Annex I of the E.U. Habitats Directive. The site is also selected as a candidate SAC for old oak woodlands, floating river vegetation, estuary, tidal mudflats, Salicornia mudflats, Atlantic salt meadows, Mediterranean salt meadows, dry heath and eutrophic tall herbs, all habitats listed on Annex I of the E.U. Habitats Directive. The site is also selected for the following species listed on Annex II of the same directive - Sea Lamprey, River Lamprey, Brook Lamprey, Freshwater Pearl Mussel, Nore Freshwater Pearl Mussel, Crayfish, Twaite Shad, Atlantic Salmon, Otter, Vertigo moulinsiana and the plant Killarney Fern. Good examples of Alluvial Forest are seen at Rathsnagadan, Murphys of the River, in Abbeyleix estate and along other shorter stretches of both the tidal and freshwater elements of the site. Typical species seen include Almond Willow (Salix triandra), White Willow (S. alba), Grey Willow (S. cinerea), Crack Willow (S. fragilis), Osier (S. viminalis), with Iris (Iris pseudacorus), Hemlock Water-dropwort (Oenanthe crocata), Angelica (Angelica sylvestris), Thin-spiked Wood-sedge (Carex strigosa), Pendulous Sedge (C. pendula), Meadowsweet (Filipendula ulmaria), Valerian (Valeriana officinalis) and the Red Data Book species Nettle-leaved Bellflower (Campanula trachelium). Three rare invertebrates have been recorded in this habitat at Murphys of the River. These are: Neoascia obliqua (Diptera: Syrphidae), Tetanocera freyi (Diptera: Sciomyzidae) and Dictya umbrarum (Diptera: Sciomyzidae).Co ns en


This site consists of the freshwater stretches of the Barrow/Nore River catchments as far upstream as the Slieve Bloom Mountains and it also includes the tidal elements and estuary as far downstream as Creadun Head in Waterford. The site passes through eight counties Offaly, Kildare, Laois, Carlow, Kilkenny, Tipperary, Wexford and Waterford. Major towns along the edge of the site include Mountmellick, Portarlington, Monasterevin, Stradbally, Athy, Carlow, Leighlinbridge, Graiguenamanagh, New Ross, Inistioge, Thomastown, Callan, Bennettsbridge, Kilkenny and Durrow. The larger of the many tributaries include the Lerr, Fushoge, Mountain, Aughavaud, Owenass, Boherbaun and Stradbally Rivers of the Barrow and the Delour, Dinin, Erkina, Owveg, Munster, Arrigle and Kings Rivers on the Nore. Both rivers rise in the Old Red Sandstone of the Slieve Bloom Mountains before passing through a band of Carboniferous shales and sandstones. The Nore, for a large part of its course, traverses limestone plains and then Old Red Sandstone for a short stretch below Thomastown. Before joining the Barrow it runs over intrusive rocks poor in silica. The upper reaches of the Barrow also runs through limestone. The middle reaches and many of the eastern tributaries, sourced in the Blackstairs Mountains, run through Leinster Granite. The southern end, like the Nore runs over intrusive rocks poor in silica. Waterford Harbour is a deep valley excavated by glacial floodwaters when the sea level was lower than today. The coast shelves quite rapidly along much of the shore.ot he ru se .

EPA Export 26-02-2010:18:59:39

A good example of petrifying springs with tufa formations occurs at Dysart Wood along the Nore. This is a rare habitat in Ireland and one listed with priority status on Annex I of the EU Habitats Directive. These hard water springs are characterised by lime encrustations, often associated with small waterfalls. A rich bryophyte flora is typical of the habitat and two diagnostic species, Cratoneuron commutatum var. commutatum and Eucladium verticillatum, have been recorded. The best examples of old Oak woodlands are seen in the ancient Park Hill woodland in the estate at Abbeyleix; at Kyleadohir, on the Delour, Forest Wood House, Kylecorragh and Brownstown Woods on the Nore; and at Cloghristic Wood, Drummond Wood and Borris Demesne on the Barrow, though other patches occur throughout the site. Abbeyleix Woods is a large tract of mixed deciduous woodland which is one of the only remaining true ancient woodlands in Ireland. Historical records show that Park Hill has been continuously wooded since the sixteenth century and has the most complete written record of any woodland in the country. It supports a variety of woodland habitats and an exceptional diversity of species including 22 native trees, 44 bryophytes and 92 lichens. It also contains eight indicator species of ancient woodlands. Park Hill is also the site of two rare plants, Nettle-leaved Bellflower and the moss Leucodon sciuroides. It has a typical bird fauna including Jay, Long-eared Owl and Raven. A rare invertebrate, Mitostoma chrysomelas, occurs in Abbeyleix and only two other sites in the country. Two flies Chrysogaster virescens and Hybomitra muhlfeldi also occur. The rare Myxomycete fungus, Licea minima has been recorded from woodland at Abbeyleix. Oak woodland covers parts of the valley side south of Woodstock and is well developed at Brownsford where the Nore takes several sharp bends. The steep valley side is covered by Oak (Quercus spp.), Holly (Ilex aquifolium), Hazel (Corylus avellana) and Birch (Betula pubescens) with some Beech (Fagus sylvatica) and Ash (Fraxinus excelsior). All the trees are regenerating through a cover of Bramble (Rubus fruticosus agg.), Foxglove (Digitalis purpurea) Wood Rush (Luzula sylvatica) and Broad Buckler-fern (Dryopteris dilatata). On the steeply sloping banks of the River Nore about 5 km west of New Ross, in County Kilkenny, Kylecorragh Woods form a prominent feature in the landscape. This is an excellent example of a relatively undisturbed, relict Oak woodland with a very good tree canopy. The wood is quite damp and there is a rich and varied ground flora. At Brownstown a small, mature Oak-dominant woodland occurs on a steep slope. There is younger woodland to the north and east of it. Regeneration throughout is evident. The understorey is similar to the woods at Brownsford. The ground flora of this woodland is developed on acidic, brown earth type soil and comprises a thick carpet of Bilberry (Vaccinium myrtillus), Heather (Calluna vulgaris), Hard Fern (Blechnum spicant), Cowwheat (Melampyrum spp.) and Bracken (Pteridium aquilinum). Borris Demesne contains a very good example of a semi-natural broad-leaved woodland in very good condition. There is quite a high degree of natural re-generation of Oak and Ash through the woodland. At the northern end of the estate Oak species predominate. Drummond Wood, also on the Barrow, consists of three blocks of deciduous woods situated on steep slopes above the river. The deciduous trees are mostly Oak species. The woods have a well established understorey of Holly (Ilex aquifolium), and the herb layer isCo ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:39

varied, with Brambles abundant. Whitebeam (Sorbus devoniensis) has also been recorded. Eutrophic tall herb vegetation occurs in association with the various areas of alluvial forest and elsewhere where the flood-plain of the river is intact. Characteristic species of the habitat include Meadowsweet (Filipendula ulmaria), Purple Loosestrife (Lythrum salicaria), Marsh Ragwort (Senecio aquaticus), Ground Ivy (Glechoma hederacea) and Hedge Bindweed (Calystegia sepium). Indian Balsam (Impatiens glandulifera), an introduced and invasive species, is abundant in places. Floating River Vegetation is well represented in the Barrow and in the many tributaries of the site. In the Barrow the species found include Water Starworts (Callitriche spp.), Canadian Pondweed (Elodea canadensis), Bulbous Rush (Juncus bulbosus), Milfoil (Myriophyllum spp.), Potamogeton x nitens, Broad-leaved Pondweed (P. natans), Fennel Pondweed (P. pectinatus), Perfoliated Pondweed (P. perfoliatus) and Crowfoots (Ranunculus spp.). The water quality of the Barrow has improved since the vegetation survey was carried out (EPA, 1996). Dry Heath at the site occurs in pockets along the steep valley sides of the rivers especially in the Barrow Valley and along the Barrow tributaries where they occur in the foothills of the Blackstairs Mountains. The dry heath vegetation along the slopes of the river bank consists of Bracken (Pteridium aquilinum) and Gorse (Ulex europaeus) species with patches of acidic grassland vegetation. Additional typical species include Heath Bedstraw (Galium saxatile), Foxglove (Digitalis purpurea), Common Sorrel (Rumex acetosa) and Bent Grass (Agrostis stolonifera). On the steep slopes above New Ross the Red Data Book species Greater Broomrape (Orobanche rapum-genistae) has been recorded. Where rocky outcrops are shown on the maps Bilberry (Vaccinium myrtillus) and Wood Rush (Luzula sylvatica) are present. At Ballyhack a small area of dry heath is interspersed with patches of lowland dry grassland. These support a number of Clover species including the legally protected Clustered Clover (Trifolium glomeratum) - a species known from only one other site in Ireland. This grassland community is especially well developed on the west side of the mud-capped walls by the road. On the east of the cliffs a group of rock-dwelling species occur, i.e. English Stonecrop (Sedum anglicum), Sheep's-bit (Jasione montana) and Wild Madder (Rubia peregrina). These rocks also support good lichen and moss assemblages with Ramalina subfarinacea and Hedwigia ciliata. Dry Heath at the site generally grades into wet woodland or wet swamp vegetation lower down the slopes on the river bank. Close to the Blackstairs Mountains, in the foothills associated with the Aughnabrisky, Aughavaud and Mountain Rivers there are small patches of wet heath dominated by Purple Moor-grass (Molinia caerulea) with Heather (Calluna vulgaris), Tormentil (Potentilla erecta), Carnation Sedge (Carex panicea) and Bell Heather (Erica cinerea). Saltmeadows occur at the southern section of the site in old meadows where the embankment has been breached, along the tidal stretches of in-flowing rivers below Stokestown House, in a narrow band on the channel side of Common Reed (Phragmites) beds and in narrow fragmented strips along the open shoreline. In the larger areas of salt meadow, notably at Carrickcloney, Ballinlaw Ferry and Rochestown on the west bank;Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:39

Fisherstown, Alderton and Great Island to Dunbrody on the east bank, the Atlantic and Mediterranean sub types are generally intermixed. At the upper edge of the salt meadow in the narrow ecotonal areas bordering the grasslands where there is significant percolation of salt water, the legally protected species Borrers Saltmarsh-grass (Puccinellia fasciculata) and Meadow Barley (Hordeum secalinum) (Flora Protection Order, 1987) are found. The very rare Divided Sedge (Carex divisa) is also found. Sea Rush (Juncus maritimus) is also present. Other plants recorded and associated with salt meadows include Sea Aster (Aster tripolium), Sea Thrift (Armeria maritima), Sea Couch (Elymus pycnanthus), Spear-leaved Orache (Atriplex prostrata), Lesser Sea-spurrey (Spergularia marina), Sea Arrowgrass (Triglochin maritima) and Sea Plantain (Plantago maritima). Salicornia and other annuals colonising mud and sand are found in the creeks of the saltmarshes and at the seaward edges of them. The habitat also occurs in small amounts on some stretches of the shore free of stones. The estuary and the other Habitats Directive Annex I habitats within it form a large component of the site. Extensive areas of intertidal flats, comprised of substrates ranging from fine, silty mud to coarse sand with pebbles/stones are present. Good quality intertidal sand and mudflats have developed on a linear shelf on the western side of Waterford Harbour, extending for over 6 km from north to south between Passage East and Creadaun Head, and in places are over 1 km wide. The sediments are mostly firm sands, though grade into muddy sands towards the upper shore. They have a typical macro-invertebrate fauna, characterised by polychaetes and bivalves. Common species include Arenicola marina, Nephtys hombergii, Scoloplos armiger, Lanice conchilega and Cerastoderma edule. The western shore of the harbour is generally stony and backed by low cliffs of glacial drift. At Woodstown there is a sandy beach, now much influenced by recreation pressure and erosion. Behind it a lagoonal marsh has been impounded which runs westwards from Gaultiere Lodge along the course of a slow stream. An extensive reedbed occurs here. At the edges is a tall fen dominated by sedges (Carex spp.), Meadowsweet, Willowherb (Epilobium spp.) and rushes (Juncus spp.). Wet woodland also occurs. This area supports populations of typical waterbirds including Mallard, Snipe, Sedge Warbler and Water Rail. The dunes which fringe the strand at Duncannon are dominated by Marram grass (Ammophila arenaria) towards the sea. Other species present include Wild Sage (Salvia verbenaca), a rare Red Data Book species. The rocks around Duncannon ford have a rich flora of seaweeds typical of a moderately exposed shore and the cliffs themselves support a number of coastal species on ledges, including Thrift (Armeria maritima), Rock Samphire (Crithmum maritimum) and Buck's-horn Plantain (Plantago coronopus). Other habitats which occur throughout the site include wet grassland, marsh, reed swamp, improved grassland, arable land, quarries, coniferous plantations, deciduous woodland, scrub and ponds. Seventeen Red Data Book plant species have been recorded within the site, most in the recent past. These are Killarney Fern (Trichomanes speciosum), Divided Sedge (CarexCo ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:39

divisa), Clustered Clover (Trifolium glomeratum), Basil Thyme (Acinos arvensis), Hemp nettle (Galeopsis angustifolia), Borrers Saltmarsh Grass (Puccinellia fasiculata), Meadow Barley (Hordeum secalinum), Opposite-leaved Pondweed (Groenlandia densa), Autumn Crocus (Colchicum autumnale), Wild Sage (Salvia verbenaca), Nettle-leaved Bellflower (Campanula trachelium), Saw-wort (Serratula tinctoria), Bird Cherry (Prunus padus), Blue Fleabane (Erigeron acer), Fly Orchid (Ophrys insectifera), Broomrape (Orobanche hederae) and Greater Broomrape (Orobanche rapum-genistae). Of these the first nine are protected under the Flora Protection Order 1999. Divided Sedge (Carex divisa) was thought to be extinct but has been found in a few locations in the site since 1990. In addition plants which do not have a very wide distribution in the country are found in the site including Thin-spiked Wood-sedge (Carex strigosa), Field Garlic (Allium oleraceum) and Summer Snowflake (Leucojum aestivum). Six rare lichens, indicators of ancient woodland, are found including Lobaria laetevirens and L. pulmonaria. The rare moss Leucodon sciuroides also occurs. The site is very important for the presence of a number of EU Habitats Directive Annex II animal species including Freshwater Pearl Mussel (Margaritifera margaritifera and M. m. durrovensis), Freshwater Crayfish (Austropotamobius pallipes), Salmon (Salmo salar), Twaite Shad (Alosa fallax fallax), three Lamprey species - Sea (Petromyzon marinus), Brook (Lampetra planeri) and River (Lampetra fluviatilis), the marsh snail Vertigo moulinsiana and Otter (Lutra lutra). This is the only site in the world for the hard water form of the Pearl Mussel M. m. durrovensis and one of only a handful of spawning grounds in the country for Twaite Shad. The freshwater stretches of the River Nore main channel is a designated salmonid river. The Barrow/Nore is mainly a grilse fishery though spring salmon fishing is good in the vicinity of Thomastown and Inistioge on the Nore. The upper stretches of the Barrow and Nore, particularly the Owenass River, are very important for spawning. The site supports many other important animal species. Those which are listed in the Irish Red Data Book include Daubentons Bat (Myotis daubentoni), Badger (Meles meles), Irish Hare (Lepus timidus hibernicus) and Frog (Rana temporaria). The rare Red Data Book fish species Smelt (Osmerus eperlanus) occurs in estuarine stretches of the site. In addition to the Freshwater Pearl Mussel, the site also supports two other freshwater Mussel species, Anodonta anatina and A. cygnea. The site is of ornithological importance for a number of E.U. Birds Directive Annex I species including Greenland White-fronted Goose, Whooper Swan, Bewicks Swan, Bartailed Godwit, Peregrine and Kingfisher. Nationally important numbers of Golden Plover and Bar-tailed Godwit are found during the winter. Wintering flocks of migratory birds are seen in Shanahoe Marsh and the Curragh and Goul Marsh, both in Co. Laois and also along the Barrow Estuary in Waterford Harbour. There is also an extensive autumnal roosting site in the reedbeds of the Barrow Estuary used by Swallows before they leave the country. Landuse at the site consists mainly of agricultural activities many intensive, principally grazing and silage production. Slurry is spread over much of this area. Arable crops are also grown. The spreading of slurry and fertiliser poses a threat to the water quality of the salmonid river and to the populations of Habitats Directive Annex II animal species within the site. Many of the woodlands along the rivers belong to old estates and supportCo ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:39

many non-native species. Little active woodland management occurs. Fishing is a main tourist attraction along stretches of the main rivers and their tributaries and there are a number of Angler Associations, some with a number of beats. Fishing stands and styles have been erected in places. Both commercial and leisure fishing takes place on the rivers. There is net fishing in the estuary and a mussel bed also. Other recreational activities such as boating, golfing and walking, particularly along the Barrow towpath are also popular. There is a golf course on the banks of the Nore at Mount Juliet and GAA pitches on the banks at Inistioge and Thomastown. There are active and disused sand and gravel pits throughout the site. Several industrial developments, which discharge into the river, border the site. New Ross is an important shipping port. Shipping to and from Waterford and Belview ports also passes through the estuary. The main threats to the site and current damaging activities include high inputs of nutrients into the river system from agricultural run-off and several sewage plants, overgrazing within the woodland areas, and invasion by non-native species, for example Cherry Laurel and Rhododendron (Rhododendron ponticum). The water quality of the site remains vulnerable. Good quality water is necessary to maintain the populations of the Annex II animal species listed above. Good quality is dependent on controlling fertilisation of the grasslands, particularly along the Nore. It also requires that sewage be properly treated before discharge. Drainage activities in the catchment can lead to flash floods which can damage the many Annex II species present. Capital and maintenance dredging within the lower reaches of the system pose a threat to migrating fish species such as lamprey and shad. Land reclamation also poses a threat to the salt meadows and the populations of legally protected species therein. Overall, the site is of considerable conservation significance for the occurrence of good examples of habitats and of populations of plant and animal species that are listed on Annexes I and II of the E.U. Habitats Directive respectively. Furthermore it is of high conservation value for the populations of bird species that use it. The occurrence of several Red Data Book plant species including three rare plants in the salt meadows and the population of the hard water form of the Pearl Mussel which is limited to a 10 km stretch of the Nore, add further interest to this site.Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:39

16.1.2003

Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

EPA Export 26-02-2010:18:59:39

S.I. No. 12 of 2001

GUIDANCE MANUAL TO LOCAL AUTHORITIES ON PREPARATION AND SUBMISSION OF MEASURES AND IMPLEMENTATION REPORTSCo ns en

Environmental Protection Agency


ot

he

ru

se

Water Quality (Dangerous Substances) Regulations, 2001.

EPA Export 26-02-2010:18:59:39

Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he ru se .

An Ghnomhaireacht um Chaomhn Comhshaoil

EPA Export 26-02-2010:18:59:39

Dangerous Substances Regulations, 2001 - EPA Guidance on Report Preparation

MEASURES AND IMPLEMENTATION REPORTS PREAMBLE The Dangerous Substances Regulations, 2001, prescribe water quality standards in relation to certain substances in surface waters, e.g., rivers, lakes and tidal waters. The substances include certain pesticides (atrazine, simazine, tributyltin1), solvents (dichloromethane, toluene, xylene), metals (arsenic, chromium, copper, lead, nickel, zinc) and certain other compounds (cyanide and fluoride). The Regulations give further effect to the EU Dangerous Substances Directive (76/464/EC) and give effect to certain provisions of the EU Water Framework Directive (2000/60/EC). This document sets out a general framework for the Dangerous Substances Measures and Implementation reports along with guidance on what the reports should contain. The purpose of preparing this document is to facilitate a consistent approach to implementation of the Regulations and reporting of same. Reporting obligations set out in the Regulations are attached as Annex A. SUBMISSION OF THE MEASURES AND IMPLEMENTATION REPORTS Each local authority is required to submit a Measures Report to the EPA by 31 July 2002 in line with Article 10(1) of the Regulations. This report should clearly set out the status of dangerous substances in waters in their functional area; the targets to be achieved; an analysis of potential pressures; and a programme of measures to achieve the standards required in the Regulations. In addition, under Article 10(2), each local authority must submit an Implementation Report to the EPA by 31 July 2004 and every two years thereafter. This report should detail the current water quality and targets; any further information gathered on potential pressures; and the progress made in implementing the proposed measures in each local authority area. It is also important that each local authority should provide information on problems that they may have encountered in the implementation of the Regulations and highlight successes. In particular, local authorities should discuss the relative success of measures applied. Only reports prepared specifically for the implementation of these Regulations will suffice. Other reports, such as those by Catchment Management & Monitoring Schemes or River Basin Management System Projects, will not be considered. However, it is strongly recommended that further information on dangerous substances arising as a result of these projects be considered by local authorities in the implementation of the Regulations and be reported on in local authority Measures/Implementation Reports where relevant.Co ns en to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra ny ot he1

The standard for tributyltin applies in relation to tidal waters only and shall be deemed to be met if the results of monitoring for biological effects indicate no reproductive impairment in gastropods. 3EPA Export 26-02-2010:18:59:39


ru

se

.


Measures and Implementation Reports prepared for the purpose of the Dangerous Substances Regulations may be submitted with reports required under the Phosphorus Regulations, 1998. The Report should be concise. The main body of the report should be restricted to approximately 20 pages with maps and data attached as Appendices. In addition to a hard copy of the Report, the main body of the report together with any tabular appendices should also be provided in electronic format. GENERAL APPROACH The EPA recommends the use of an environmental management systems approach to implementation of the Regulations. This approach operates on the basic principle of continual improvement, which is at the heart of the Regulations. The common principles underpinning an environmental management system approach are outlined in Figure 1, adapted to the requirements of the Regulations.

Assessment of Water Quality

to f c Fo op r i yr ns ig pe ht ct ow ion ne pu r r rp eq os ui es re o d nl fo y. ra nyProgramme Implementation

Review and Fine-Tuning of Programme based on assessment of water quality and results of audit Auditing System Performance

otTHE MEASURES REPORTSetting Targets & Objectives/ Planning for Implementation/ Programme Formulation

LOCAL & NATIONAL IMPLEMENTATION REPORTS

Figure 1 Generalised Environmental Management Systems Approach Adapted to Requirements of the Regulations On an operational level the environmental management system consists of: initial review (in this case baseline status of water quality, analysis of pressures on water resources, review of monitoring programmes etc.); formulation of measures and targets; formulating an environmental management programme or, in this case, an implementation programme for achieving the targets; assigning responsibility for achieving targets and implementing actions; implementing the programme; auditing the performance of the programme; and reviewing and fine tuning the programme until the standards are met. The environmental management programme is often described as the engine for continual improvement. However, targets will only be met by keeping the system


Co

ns en

he

ru

se

.

4EPA Export 26-02-2010:18:59:39


dynamic and subjecting the system to periodic auditing to assess the relative success of measures chosen for meeting the targets. Auditing, in turn, provides information that can be used for reviewing and fine tuning the system so that changes or modifications can be made where necessary. As local authorities are obliged to report every two years to the EPA on the implementation of the Regulations, the EPA recommends that a system audit be conducted prior to preparation of each Implementation Report. Therefore any changes or modifications necessary to meet the standards can be included in the updated Implementation reports.

MAIN HEADINGS FOR MEASURES AND IMPLEMENTATION REPORTS The EPA recommends the following main headings for the Measures and Implementation Reports. The Measures Report should report on Sections 1-3 and the Implementation Reports should report on Sections 1-4. Each loca

operation philosophy wastewater treatement plant

Documents