Stamullen Waste Water Works - Environmental Protection · PDF fileStamullen Waste Water Works Annual Environmental Report for ... Value (ELV) exceedances and the reason for the exceedances.

Stamullen

Waste Water Works

Annual Environmental Report

for

EPA Waste Water Discharge Licence D0262-01

08/11/2010 to 31/12/2010

Table of Contents

Section Title Page

1 Introduction

1.1 Introduction 1

2 Monitoring Results

2.1 Flow Report. 3

2.2 Influent and Effluent Flows Report. 5

2.3 Influent and Effluent Monitoring Report. 8

2.4 Mass Loading – PRTR Calculations (Final Effluent). 10

2.5 Data Collection & Reporting Requirements as per UWWT Directive. 12

2.6 Plant Loading Calculations. 14

3 Complaints and Incidents Reports

3.1 Complaints Summary 16

3.2 Incidents Summary 16

4 Infrastructural Assessment & Programme of Improvements.

4.1 Infrastructural Assessment & Programme of Improvements. 18

5 Licence Specific Reports.

5.1 Licence Specific Reports 20

6 Pollution Release and Transfer Register (PRTR)

6.1 Pollution Release and Transfer Register. 21

7 Approval

7.1 Approval 23

SECTION 1

Introduction

SECTION 1.1: INTRODUCTION

Agglomeration: Stamullen Waste Water Works

Licence No: D0262-01

Stamullen Waste Water Treatment Plant (WwTP) is operated and maintained by Meath

County Council. The waste water treatment plant was built to serve the agglomeration of

Stamullen Co. Meath and is licensed for a population equivalent (p.e.) of 3,465.

Stamullen WwTP includes screening, two compact aeration units (fine bubble diffusers) each

incorporating a central clarifier, ferric dosing, two sludge holding tanks and a storm water

tank. The primary discharge from the WwTP is to the River Devlin.

The following Annual Environmental Report (AER) has been prepared as per Condition 6.10

of Meath County Council’s Discharge Licence D0262-01 and includes all information

requested under schedule D of this licence.

Page 1 of 23

SECTION 2

Monitoring Results

Page 2 of 23

SECTION 2.1: FLOW REPORT.

Final Effluent Flow Meter

The final effluent flow meter at Stamullen WwTP was not operating correctly during the

reporting period. The flow meter is now serviced, calibrated and operating satisfactorily but

for the purpose of this report Meath County Council, taking into account losses through

sludge wasting, dewatering etc has estimated the daily final effluent flow to be 95% of the

total daily influent flow recorded at the plant. See SECTION 2.2: INFLUENT AND EFFLUENT

FLOW REPORT.

Page 3 of 23

Page 4 of 23

Influent (m3/d) Estimated Final Effluent (m3/d)

Stamullen WwTP

Date

SECTION 2.2: INFLUENT AND EFFLUENT FLOW REPORT

Reporting Period:

Date Licensed:

Treatment Plant:

08/11/2010

01/01/10 to 31/12/10

Title:: Influent and Effluent Flows

Meath County CouncilEPA Waste Water Discharge Licensing

08/11/2010 588 559

09/11/2010 606 576

10/11/2010 607 577

11/11/2010 594 564

12/11/2010 510 485

13/11/2010 587 558

14/11/2010 659 626

15/11/2010 564 536

16/11/2010 585 556

17/11/2010 563 535

18/11/2010 585 556

19/11/2010 509 484

20/11/2010 562 534

21/11/2010 594 564

22/11/2010 511 485

23/11/2010 594 564

24/11/2010 565 537

25/11/2010 528 502

26/11/2010 484 460

27/11/2010 537 510

28/11/2010 586 557

29/11/2010 540 513

30/11/2010 618 587

01/12/2010 620 589

02/12/2010 589 560

03/12/2010 427 406

04/12/2010 570 542

05/12/2010 649 617

06/12/2010 575 546

07/12/2010 575 546

08/12/2010 575 546

09/12/2010 575 546

Page 5 of 23

Influent (m3/d) Estimated Final Effluent (m3/d)

Stamullen WwTP

Date

SECTION 2.2: INFLUENT AND EFFLUENT FLOW REPORT

Reporting Period:

Date Licensed:

Treatment Plant:

08/11/2010

01/01/10 to 31/12/10

Title:: Influent and Effluent Flows

Meath County CouncilEPA Waste Water Discharge Licensing

10/12/2010 610 580

11/12/2010 626 595

12/12/2010 603 573

13/12/2010 582 553

14/12/2010 449 427

15/12/2010 524 498

16/12/2010 431 409

17/12/2010 543 516

18/12/2010 487 463

19/12/2010 608 578

20/12/2010 454 431

21/12/2010 475 451

22/12/2010 492 467

23/12/2010 548 521

24/12/2010 553 525

25/12/2010 462 439

26/12/2010 635 603

27/12/2010 571 542

28/12/2010 575 546

29/12/2010 532 505

30/12/2010 639 607

31/12/2010 473 449

Average Flow (m3/d): 557

Annual Mass Flow (Total m3 for 365 days): 203,474

Storm Overflow (Estimate: 10% of Annual Mass Flow): 20,347

Number of days recorded: 54

530

193,300

54

Calculations:

Influent Effluent

Page 6 of 23

Page 7 of 23

Meath County CouncilEPA Waste Water Discharge Licensing

Reporting Period: 01/01/10 to 31/12/10

Treatment Plant: Stamullen WwTP

INFLUENT (mg/l) EFFLUENT (mg/l)

BOD COD SS TP TN NH4OPBOD COD SS TP TN NO2NO3Date

Licence Status:

Type of Analysis: Licence Monitoring

TON

(kg/d)

BOD TP Comments

Granted 08/11/2010

Elevated Influent Result Reportable ELV Exceedance (Note 3)Non reportable ELV Exceedance (Note 2)

Section 2.3 Influent and Effluent Monitoring Report.

m3/d m3/dp.e Ref:

Full Compliance (Note 1)

225 474 210 7 33.0 39.0 9.2 1.6 1.2056 13.7 11.0416/12/2010 10,01613.5 0.7431 Note 34091,616

225 474 210 7 33 39 9 1.6 1.256 14 11

25 125 35 2.0 3

Average:

ELV - Non-reportable incident limits.

431 1,616 409

50 250 88 2.4 4ELV - Reportable incident limits.

225 474 210 7 33 39 9 2 156 14 11Sum: 431 409

13.5 0.7

14 1

Page 8 of 23

Page 9 of 23

Meath County CouncilEPA Waste Water Discharge Licensing

Reporting Period: 01/01/10 to 31/12/10

Treatment Plant: Stamullen WwTP

Licence Status:

Type of Analysis: Licence Monitoring

Granted 08/11/2010

Section 2.4 Mass Loading - PRTR Calculations (Final Effluent).

33.0

NH4OrthoPBOD COD TSS TP TN NitriteNitrate

E. Sum of daily effluent loads (mg/l)

0.033040H. Flow weighted average concentration (F/C)

6,387I. Flow Weighted Mass Emission (kg/annum) (HxB)

33.0D. Average daily effluent load (mg/l):

B. Total annual mass effluent flow (m3/annum) (INFLUENT AND EFFLUENT FLOW REPORT, SECTION 2.2): 193,300

17.5

C. Sum of daily effluent flows on the sampling dates (m3): 409

F. Sum of daily effluent mass loads (kg/day)

39.0

0.039000

7,539

39.0

20.7

9.2

0.009200

1,778

9.2

4.9

1.6

0.001590

307

1.6

0.8

1.2

0.001200

232

1.2

0.6

13.7

0.013700

2,648

13.7

7.3

11.0

0.011040

2,134

11.0

5.9

A. Average effluent flows (m3/d) (INFLUENT AND EFFLUENT FLOW REPORT, SECTION 2.2): 530

Calculations:

33.0G. Flow weighted average concentration x 1000 (mg/l) 39.0 9.2 1.6 1.2 13.7 11.0

Page 10 of 23

Page 11 of 23

SECTION 2.5: DATA COLLECTION & REPORTING AS PER UWWT DIRECTIVE.

The Environmental Section of Meath County Council is responsible for all the data collection and

reporting requirement under the Urban Waste Water Treatment Directive. All results have been

submitted via the EPA Online Returns Website.

Page 12 of 23

Page 13 of 23

SECTION 2.6: PLANT LOADING CALCULATIONS.

Treatment Plant: Stamullen WwTP

Date Licensed: 08/11/2010

Reporting Period: 08/11/10 to 31/12/10

Monitoring Type: Licence Monitoring

p.e formula:

KgBOD/d: (BOD(mg/l) x Flow (m3))/1000

p.e: (KgBOD/d) / 0.060 kg BOD per capita per day.

Influent BOD kg/annum: (Sum of daily influent flows (m3) x Average BOD (mg/l))/1000

Calculations:

Licensed/Design capacity of WwTP (p.e): 3,465

Average influent BOD (mg/l): 225

Average daily influent flow (m3/d):

Note1 557

Sum of the daily influent flows (m3/d):

Note2 203,474

Total influent BOD kg/annum (required for PRTR): 45,782

Calculated p.e: 2,089

Available capacity in the WwTP at the current loading (p.e) 1,376

Comments:

Note 1: The average daily influent flow used to calculate the current plant loading is

the average of the all the daily influent flows recorded in 2010. See SECTION

2.2 INFLUENT AND EFFLUENT FLOW REPORT.

Note 2: Annual Mass Influent Flow, calculated in SECTION 2.2 INFLUENT AND

EFFLUENT FLOW REPORT.

Page 14 of 23

SECTION 3

Complaints and Incident Reports

Page 15 of 23

SECTION 3.1: COMPLAINTS SUMMARY

There were no complaints recorded during the AER reporting period 08/11/10 to 31/12/10.

SECTION 3.2: INCIDENTS SUMMARY

The following incident reports were sent to the EPA. The reports include the Emission Limit

Value (ELV) exceedances and the reason for the exceedances. The reports also include the

corrective actions taken and the preventative measure put in place by Meath County Council

to ensure full compliance with Stamullen’s waste water discharge licence.

Incident Reports:

1) Incident Ref: 10,016 – ELV Exceedance. Reported June 2011

A copy of each report is available for inspection, centrally at Navan WwTP.

Page 16 of 23

SECTION 4

Infrastructural Assessment

&

Programme of Improvements

Page 17 of 23

SECTION 4.1: INFRASTRUCTURAL ASSESSMENT & PROGRAMME OF IMPROVEMENTS.

As the discharge licence was granted in the last quarter of 2010 no infrastructural

assessments or programme of improvements were carried out during the reporting period.

A more detailed report will be included in the second AER (01/01/11 to 31/12/11).

Page 18 of 23

SECTION 5

Licence Specific Reports

Page 19 of 23

SECTION 5.1: LICENCE SPECIFIC REPORTS

As the discharge licence was granted in the last quarter of 2010 no licence specific reports

were carried out during the reporting period (08/11/10 – 31/12/10).

Page 20 of 23

SECTION 6.1: POLLUTION RELEASE AND TRANSFER REGISTER.

No Pollution, Release and Transfer Register (PRTR) is required for this reporting period as the

discharge licence was granted in the last quarter of 2010.

Page 21 of 23

SECTION 7

Approval

Page 22 of 23