For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Appendices

Appendix A

Section B.10 Seveso Regulations

Attachment B.10 Maximum Likely Quantities On-Site & COMAH Thresholds.

Appendix B

Total Suspended Solids at SP1 - October 2013 to March 2014 including and without rainfall

Appendix C

Section I.2.2 - Discharge of uncontaminated surface water runoff to drainage ditch (SW2).

Appendix D

Assessment of the impact of sediments in the discharge on the shallow Carrowmore Lake.

Appendix E

Bellanaboy Bridge Gas Terminal – Updated Operational Noise Emissions Models

Appendix F

Section E.2.2. Table E.6 - Summary of Proposed Discharge to Surface Waters - for points SW1 and SW3

Annex 1: Table/ Attachment Table E.2 (i) - Emissions to Surface Water for points SW1 and SW3

Table I.2 (i) – Surface Water Quality

Drawing E.2.1 Corrib Bellanaboy Bridge Gas Terminal Treated Water Discharge Locations.

Appendix G

Non-Technical Summary

Appendix H

Table E.1 (ii) Main Emissions to Atmosphere

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Appendix A

Section B.10 Seveso Regulations

Attachment B.10 Maximum

Likely Quantities On-Site &

COMAH Thresholds

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

B.10 Seveso II Regulations

State whether the activity is an establishment to which the EC (Control of Major

Accident Hazards involving Dangerous Substances) Regulations (S.I. No. 74 of 2006)

apply.

If yes, outline how the process comes under these regulations.

Supporting information should be included in Attachment No B.10.

Answer:

The Terminal constitutes an establishment to which the European Communities

(Control of major Accident Hazards Involving Dangerous Substances) Regulations

2006 (S.I. No. 74 of 2006) applies.

The unstabilised condensate, product and raw methanol inventories exceed the

Lower Tier threshold requirements for Articles 6 & 7 of the Seveso II Directive,

requiring notification and preparation of a Major Accident Prevention Policy as

transposed into Irish law by Regulations 10 & 11 of S.I. no. 74 2006 [Ref 2]. No

single inventory on site reaches the requirements of Regulation 12 of S.I. no. 74

2006 (i.e. upper tier threshold, see Attachment B.10). Therefore, based on single

inventory thresholds, the site qualifies as a lower tier site.

Where an establishment has single inventory levels lower than the qualifying

thresholds identified under Schedule 1 (Part 1 and Part 2), then the addition rule

approach is applied to determine if ‘total’ categorised quantities are above or equal

to the qualifying quantity i.e. “1”. From their risk phrases as detailed in safety data

sheets, the materials are divided into ‘toxic’, ‘flammable’, and ‘eco-toxic’ categories

so that their aggregated inventories can be assessed against the requirements of

Schedule 1, Part 2, Note 4 [Ref 2] i.e.

If the sum q1/QU1 + q2/QU2 + … ≥ 1, where qx = the quantity of dangerous

substance x (or category of dangerous substances) falling within Parts 1 or 2 of

Annex 1 and QUX = the relevant qualifying quantity for substance or category x

from Parts 1 and 2, then the relevant provisions apply.

The summation is applied separately to overall hazards associated with toxicity,

flammability and eco-toxicity.

From the calculations involving the aggregated inventories (see Attachment B.10),

the summations are above 1.0 with respect to the upper tier assessment on a

flammability basis, and therefore the site qualifies as an upper tier site.

Ref 1. Seveso II Directive 96/82/EC as amended by Council Directive 2003/105/EC. Ref 2. S.I. No. 74 of 2006 European Communities (Control of Major Accident Hazards Involving Dangerous Substances) Regulations 2006 and associated HSA Guidance notes

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

ATTACHMENT B.10 MAXIMUM LIKELY QUANTITIES ON-SITE & COMAH THRESHOLDS Normal Gas and Liquid Level in process vessels (including slugcatcher) as well as High High level in the storage tanks i.e. methanol tanks (product and raw) and condensate tanks

Aggregation quotient

Flammability Toxicity Ecotoxicity

Description Quantity stored (tonne)

Named Lower Upper Lower Upper Lower Upper

Acetylene 0.39 Yes 0.078 0.0078

Aeroshell Fluid 1,41 0.03 No

0.00015 0.00006

Shell Omala 100,150,220 - Lubricant

0.09 No

0.00045 0.00018

Condensate stabilised (Petroleum products)

711 Yes 0.2844 0.02844

0.284 0.0284

Corroless, Cortron CK352, KI 302C (Corrosion Inhibitor)

4 No

0.08 0.02 0.04 0.02

Demulsifier 0.05 No 0.00001 0.000001

Diesel 76.8 Yes

0.031 0.0031

MB-554 Diesel Biocide 0.05 No 0.00001 0.000001

0.0005 0.00025

Hydrocarbon gas (natural gas) 48 Yes 0.97 0.242

Unstabilised Condensate 48 No 4.76 0.95

0.238 0.095

Hydrogen 0.005 Yes 0.001 0.0001

Methanol (Product) 787 Yes 1.574 0.1574 1.574 0.1574

Methanol (Raw - 40% methanol 60% water)

2563 Yes 5.13 0.51 5.13 0.51

Nitric acid 0.05 No 0.001 0.00025

Nynas Nytro Lyra X - Transformer lubricant

4 No

0.07 0.02

80%Tert butyl mercaptan, TBM, 20% Dimethyl sulphide, DMS (Odorant)

9 No 0.0018 0.00018 0.18 0.045

Diethyl-hydroxylamine (DEHA) (Oxygen Scavenger)

2 No 0.0004 0.00004

Propane 0.47 Yes 0.0094 0.00235

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Puraspec 5158 15 No

0.15 0.08

Sodium Hypochlorite Solution 0.5 No

0.005 0.0025

Tectyl 502C 0.02 No 0.000004 4E-07

TOTAL

12.8 1.9 7.03 0.753 0.75 0.225

Notes:

-The above inventories are quoted to normal level for the process vessels and HH levels for storage tanks. -With respect to the defined HH levels for the Product, Raw Methanol & Condensate storage tanks, this equates to all storage tanks full to the LAHH. However, e.g. the typical/normal expected inventory for the Raw Methanol Storage tanks will be 2 out of 3 tanks full to the LAH. -The above is presented as the maximum likely inventory on site. This is a conservative scenario given typical operating levels in the tanks will be below the values quoted.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Appendix B

Total Suspended Solids at SP1 -

October 2013 to March 2014

including and without rainfall.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Page 1

0.0

0.5

1.0

1.5

2.0

2.5

3.0

0

5

10

15

20

25

30

35

40

Rain

fall (

mm

)

Co

ncen

trati

on

(m

g/l)

Date

Total Suspended Solids at SP1 October 2013 - March 2014 including rainfall

TSS Action Limit Target Limit Composite Rainfall

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Page 1

0

5

10

15

20

25

30

35

40

Co

ncen

trati

on

(m

g/l)

Date

Total Suspended Solids at SP1 October 2013 - March 2014 without rainfall

TSS Action Limit Target Limit Composite

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Appendix C

Section I.2.2 - Discharge of

uncontaminated surface water

runoff to drainage ditch (SW2).

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

I.2.2 Discharge of uncontaminated surface water runoff to drainage ditch (SW2)

1.2.2.1 Receiving Environment

Uncontaminated surface water runoff from the Terminal will be discharged into a drainage

ditch (D 16) which runs along the R3 14 road. The drainage ditch feeds into the Muingingaun

River which is a tributary of Bellanaboy River which ultimately discharges into Carrowmore

Lake. Carrowmore Lake is a Special Protection Area (SPA) and part of a larger, complex

Special Area of Conservation (SAC). It is also an important local amenity in terms of water

abstraction, angling and scenic quality.

I.2.2.2 Surface Water Quality Monitoring Results

SEPIL commissioned Wood Environmental Management Ltd (WEML) to carry out chemical

and biological surface water quality monitoring on a number of local watercourses. Among

the watercourses monitored were the drainage ditch D16, the Muingingaun River, the

Bellanaboy River, and Carrowmore Lake. Water quality monitoring was carried out on a

monthly basis over the period June 2001 to May 2002. The monitoring results are detailed in

a report by WEML included in Attachment I.2 and summarised in the following section.

None of the watercourses or rivers in the area are designated salmonid rivers in the European

Communities (Quality of Salmonid Water) Regulations, 1988 but water quality can be

assessed by comparing the monitoring results to the limit values in the Regulations. Some

exceedances of limit values for pH, dissolved oxygen, temperature, suspended solids,

ammonium and nitrite were recorded for each of the above watercourses.

The monitoring results were also compared against the European Communities (Drinking

Water) Regulations, 2000. None of the watercourses are used for abstraction of drinking

water but a number of them flow into Carrowmore Lake which is used as a source of drinking

water. The monitoring indicated some exceedances of the limit values for pH and ammonium

for each of the above watercourses.

The average phosphate levels recorded in the watercourses indicate that a quality rating (Q

Index) ranging of 44 to Q5 (unpolluted) would be assigned to the watercourses based on the

Water Pollution Act, 1977 (Water Quality Standards for Phosphorus) Regulations, 1998.

(Note: This rating is based solely on phosphate levels and doesn’t take into account biological

monitoring results).

Macroinvertebrate sampling and analysis was undertaken at sampling locations on the

Bellanaboy and Muingingaun rivers. On the basis of the macroinvertebrate sampling the

rivers were assigned quality (Q-value) ratings. Due to environmental conditions and seasonal

changes the Q-value index for the rivers varied during the sampling year. The Q-rating of the

Bellanaboy river ranged from 43 to 44 (Moderately Polluted to Unpolluted) while the Q-

rating for the Muingingaun river was in general 43-4 (Slightly Polluted).

Suspended solids, nutrients, chlorophyll and water transparency levels were monitored in

Carrowmore Lake over the course of the year. Relatively low levels of suspended solids were

recorded in the lake. The levels of other parameters recorded indicated the trophic status of

the lake to be Mesotrophic / Eutrophic.

In summary the results of the water quality monitoring of the watercourses in the vicinity of

the Terminal indicate the watercourses to be slightly to moderately polluted based on the Q-

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

value rating system. There are a number of potential sources of pollution in the catchment

area including agriculture, forestry, cutaway bogs and septic tanks which could all impact on

the water quality.

1.2.2.3 Assessment of Impact

Surface water runoff discharged from non-process areas of the Terminal will be

uncontaminated and therefore should not have any significant impact on the receiving

watercourses. The surface water collection and treatment system (described in Section F. 1.2)

has been designed to handle extreme rainfall events and will conduct the surface water runoff

from the site to the existing watercourse with minimum disturbance to the existing hydrology

of the area and will prevent the occurrence of flooding or polluting matter from entering the

watercourse.

The settlement ponds have been very conservatively designed and will provide buffering

storage capacity during high rainfall events and together with other measures incorporated

into the drainage system (e.g. “rip rap” outfalls) will assist in retarding flow velocity,

diffusing the water intensity and preventing scouring / erosion of existing watercourse.

The water to be discharged consists of uncontaminated surface water runoff. The discharge

water quality will be similar to or better than the existing surface water runoff quality from

the site. The settlement ponds are designed to reduce the levels of suspended solids to less

than 30 mg/l. This will be attained even during the worst case rainfall event

(l00-year 1 hour rainfall event of 31mrn) and therefore lower discharge levels of suspended

solids will be attained during more typical rainfall scenarios.

During operation of the Terminal it is unlikely that any oil could enter the uncontaminated

surface water drainage system. Nevertheless each settlement pond will incorporate an oil

skimmer as an added precaution. The Terminal perimeter drainage system will also

incorporate a 10m3 concrete tank. In the unlikely event of contaminated surface water

entering the perimeter drainage system it would be contained within this tank and pumped to

the Terminal treatment system for oily water (i.e. surface water runoff from process areas).

The quality of the surface water discharged will be monitored on a regular basis to ensure it

meets the required standard and that the settlement ponds continue to work effectively. The

drainage system and settlement ponds will be regularly inspected and maintained.

In summary, uncontaminated surface water from the Terminal will be discharged to a

drainage ditch in the vicinity of the Terminal which drains to a local watercourse. Water

quality monitoring indicates that the local watercourses are slightly to moderately polluted.

The Terminal site surface water collection and treatment system has been conservatively

designed. This will prevent any increased flooding risk of local watercourses and will ensure

that the quality of the surface water discharged is equal to or better than the quality of the

existing surface water runoff. Therefore the discharge of the uncontaminated surface water

from the Terminal to a local watercourse is not predicted to have any likely significant

adverse impact.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Appendix D

Assessment of impact of

sediments in the discharge on the

shallow Carrowmore Lake.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

APPENDIX D

SEDIMENT CONTROLS PROPOSED AND DETAILS OF THEIR ACHIEVABLE PERFORMANCE AND LIMITS

1. OVERVIEW OF TERMINAL SURFACE WATER DRAINAGE SYSTEM Surface water is collected from the terminal footprint in an open channel drainage network. Surface water is collected from the landscaped peat areas, surrounding the terminal footprint, in a series of drainage ditches. The surface water from process areas, where it is at risk of becoming contaminated, does not enter these systems. Both the open channel system and the drainage ditch system have intermediate silt traps. The collected surface water passes through settlement ponds prior to discharge. The discharge is to the drain designated as D16, which discharges to the Muiningaun River. The Muiningaun River is a tributary of the Bellanaboy River, which flows into Carrowmore Lake.

2. SUSPENDED SOLIDS LOADING AND SURFACE WATER RUNOFF Suspended solids are entrained in surface water runoff as a result of a number of processes combined with the rainfall which generates a transport medium for the suspended solids. The primary erosion mechanisms are outlined in the following sections.

2.1 TERMINAL FOOTPRINT Suspended solids enter the terminal surface water runoff as a result of the following processes:

• general atmospheric deposition

• sediment loss from landscape areas

• wear from vehicle tyres

• deposition from vehicle exhausts

• sediment loss from roads & stones areas

CIRIA Document 609 Suspend Solids gives estimates of the potential suspended solids loading in surface water from various types of activities. Refer to Table 1 below.

SEPIL has undertaken monitoring of surface water at manhole 27 in the terminal footprint. Refer to Table 2 below.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Table No.1 CIRIA Document 609 Suspended Solids Loading

CIRIA 609 - Sustainable Drainage Systems - Hydraulic, Structural & Water Quality Advice

Catchment Type Suspended Solids mg/L Mean 1st Quartile 3rd Quartile Urban Area 126.30 57.00 279.00 Industrial 50.40 18.10 140.00 Residential 85.10 37.60 192.50 Motorway 195.00 110.10 343.00 Main Roads 156.00 62.20 396.00

Table No.2 SEPIL 2014 Data from MH 27 (Discharge from Terminal Footprint)

Suspended Solids mg/L

Average Minimum Maximum Manhole 27 7.40 3.40 14.10

As can be seen from Table 1 and Table 2 above, the existing suspended solids concentration in the surface water from the terminal footprint is significantly lower than the estimated suspended solids concentration as noted in the CIRIA 609 Reference Document. The difference is mainly attributable to the sediment control measures that are present in the terminal. These are detailed in Section 2.2 below.

2.2 SEDIMENT CONTROL MEASURES - TERMINAL FOOTPRINT The concentration of suspended solids that enters the surface water runoff from the Terminal footprint has been minimised by the implementation of the following control measures on site:

• All surface water runoff from roads and hardstanding areas that discharge to the settlement ponds is collected in open drainage channels which have been constructed with minimum gradients which allow suspended solids to be retained within the channel for collection and removal off site.

• All surface water runoff from roads and hardstanding areas flow through a number of silt collection traps prior to discharging to the surface water drainage system which discharges to the settlement ponds.

• The use of vehicles within the terminal footprint is minimised thus preventing tyre wear etc.

• The use of vehicles within the terminal footprint is minimised which reduces the wear and tear on the roads and hard standing areas.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

• Large areas of the terminal footprint are stoned and are not likely to generate significant surface water runoff

• Open channels and silt traps are regularly cleaned by SEPIL maintenance staff.

The Met Eireann long term annual average rainfall for Belmullet, the nearest monitoring station, is 1.2448m per annum. The area of the terminal footprint contributing surface water run-off to the settlement ponds is 13.0844ha.

The suspended solids loading for the terminal has been calculated using both the CIRIA estimates and the SEPIL monitoring data and using the annual average rainfall value for the region. This information is presented in Table No. 3 below. The SEPIL data is considered more realistic, as it reflects the control measures present on site. The expected average suspended solids loading from the Terminal footprint is circa 1,205kg/Yr.

Table No.3 Suspended Solids Loading per year from Terminal Site ie within the Terminal Security Footprint

Suspended Solids kg/Yr Suspended Solids kg/Yr

Ciria 609 Reference Document

SEPIL 2014 SS Monitoring Data

Average 8,208.88 1,205.27 Min 2,948.03 553.77 Maximum 22,802.45 2,296.53

It should be noted that the above values are average readings and higher concentrations may be encountered during periods of heavy rainfall events.

2.3 REINSTATED LANDSCAPED PEAT AREAS Suspended solids enter the surface water runoff as a result of rainfall and overland flow disturbing the peat surface, resulting in erosion of the peat surface, which in turn generates suspended solids in the surface water runoff. The primary erosion mechanism is sediment erosion caused by rainfall and overland flow.

The quantification of the suspended solids concentration within the surface water runoff from the reinstated peat areas has been based on data on suspended solids in runoff from peat areas in the Erodibility of Hill Peat by Mulqueen et al; University of Ireland, Galway. This information is presented in Table No. 4 below.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Table No.4 Suspended Solids Concentration Erodibility of Hill Peat; by Mulqueen et al; Nat. University of Ireland,

Galway Catchment Type Suspended Solids mg/L

The Leenane catchment in Co. Mayo has a ground cover of circa 70%

Sample No. 1 2.30 Sample No.2 4.20 Sample No. 3 3.40 Sample No. 4 5.00 Sample No. 5 3.40 Sample No. 6 4.30 Average 3.77

2.4 SEDIMENT CONTROL MEASURES – REINSTATED LANDSCAPED PEAT

AREAS The concentration of suspended solids that enters the surface water runoff from the reinstated peat areas will be minimised by the implementation of the following mitigation measures on site:

• Provision of vegetation cover to 100% of the reinstated peat areas.

• Provision of silt traps within any open channels in order to collect suspended solids.

• Open channels and silt traps being regularly maintained by SEPIL maintenance staff.

The area of the reinstated landscaped peat surrounding the terminal footprint is 125.92ha. The suspended solids loading from this area has been calculated using the above data on suspended solids in runoff and the annual average rainfall value for the region. This information is presented in Table No. 5 below. The expected average suspended solids loading from the reinstated landscaped peat areas shall be circa 5,904kg/year.

For the duration of the landscaping and peat areas reinstatement activities, which are currently underway on site, further sediment control measures are being implemented.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:52

Table No.5 Suspended Solids Loading per year from the Peat Reinstated Areas of the Corrib Site Suspended Solids kg/year

Erodibility of Hill Peat; by Mulqueen et al; Nat. University of Ireland, Galway

Min 3,605.01 Average 5,903.86 Maximum 7,836.99

3. SETTLEMENT PONDS The existing surface water settlement ponds were designed to control sediment in the runoff during the construction phase of the project. During this phase there were large areas of bare soil and peat exposed to potential erosion, peat and soil was being handled on site, and there were potentially significantly larger flow rates and suspended solids concentrations in the runoff. The settlement ponds will be retained in use during the permanent phase.

Using the settlement ponds will ensure that there is additional control of suspended solids from the surface water runoff from the terminal footprint and the reinstated landscaped peat areas.

Table No 6 below presents the combined suspended solids loading entering the settlement ponds from the terminal footprint and the reinstated landscaped peat areas, quantified as described above.

Table No.6: Total Suspended Solids Loading to Settlement Ponds Kg/Yr Average Concentration mg/L

7,109.14 4.11

Based on a suspended solids removal rate in the settlement ponds of circa 50%, and the calculated total flow of 1,730,272m3 per year, the expected average suspended solids concentration in the outflow from the settlement ponds will be circa 2.05mg/L.

Table No.6: Total Suspended Solids Loading discharged from the Settlement Ponds based on 50% Treatment efficiency

Kg/Yr Average Concentration mg/L

3,554.57 2.05

It should be noted that the above value is the average and much higher concentrations may be encountered during periods of heavy rainfall and/or routine maintenance of the reinstated landscaped peat areas.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

4. ASSESSMENT OF THE IMPACT ON CARROWMORE LAKE OF THE SEDIMENTS IN THE DISCHARGE

4.1 ASSESSMENT METHODOLOGY Carrowmore Lake is 960ha in area with several rivers and numerous streams entering it. The assessment estimates the quantity of additional sediment entering Carrowmore Lake yearly from the terminal footprint and adjacent landscaped peat areas. The resultant increase in the concentration of the suspended solids in the lake is calculated. The significance of the increase is assessed with reference to the European Communities (Quality of Salmonid Waters) Regulations, 1988, limit for suspended solids. Carrowmore Lake suspended solids monitoring Mayo County Council undertakes suspended solids monitoring of Carrowmore Lake. Results of recent monitoring are tabulated below.

Date Number of samples

Average mg/l

Maximum mg/l

Minimum mg/l

1/1/2013 to 6/3/2013 10 14 45 <5 13/3/2013 to 9/4/2013 5 10 19 <5 17/4//2013 to 18/6/2013 9 8 26 <5 27/6/2013 to 4/9/2013 11 7 24 <5 10/9/2013 to 31/10/2013 8 9 15 <5 1/11/2013 to 31/12/2013 8 7 9 <5 January and February 2014

2 6 7 <5

Source: Mayo County Council’s website http://www.mayococo.ie/en/News/CorribGasDevelopment/CorribGasTerminalDevelopment/MinutesofMonitoringCommitteeMeetings/AssociatedReports/

4.2 IMPACT ASSESSMENT The area of Carrowmore Lake is 960ha = 9,600,000m2. The maximum depth is approximately 2.5m. A conservative assumption is that the volume of water in the lake is 9.6x106 x 2.5 / 2 = 1.2 x 107m3. It is assumed that the maximum concentration of suspended solids in the discharge from the terminal settlement ponds is 30mg/l and the average concentration is 2.05mg/l. Refer to section 3 above for the quantification of the average suspended solids concentration in the discharge from the settlement ponds. The calculated annual volume of run-off from the terminal footprint and landscaped peat areas, based on Met Eireann long term rainfall data, is 1,730,272m3. The total sediment in this run-off is estimated at 3555kg/year. This load will increase the concentration of sediment in Carrowmore Lake by:

3,555 x 106 ÷ 12,000,000 x 103 = 0.296mg/l.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

0.296mg/l is circa 1% of the Salmonid Regulations limit for suspended solids, which is 25mg/l. As the suspended solids concentration in the lake is well below 25mg/l, an increase of this magnitude is not significant.

5.0 CONCLUSIONS

It is estimated that the total sediment run-off from the terminal footprint will be 3,555kg/year. This load will increase the concentration of sediment in Carrowmore Lake by 0.296mg/l. This value is approximately 1% of the Salmonid Regulations limit for suspended solids. As the suspended solids concentration in the lake is well below 25mg/l, an increase of this magnitude is not significant.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Appendix E

Bellanaboy Bridge Gas Terminal

– Updated Operational Noise

Emissions Models

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

REPORT 7648.140128.ENMrev03

BELLANABOY BRIDGE GAS TERMINAL

CORRIB GAS TERMINAL NOISE

EMISSIONS MODEL

OPERATIONAL NOISE EMISSIONS MODELS

Prepared: April 2014

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

CONTENTS

1. Introduction 1

2. Noise Modelling Methodolgy 1

2.1 Meteorological Conditions 2

2.2 Calculation Assumptions 2

2.3 Operation Scenarios 2

2.4 Flaring Scenarios 2

2.5 Ground Flare 3

3. Calculation Results 4

3.1 Operational Noise 4

3.2 Further Site Sources 5

3.3 Flare Noise 5

4. Conclusions 6

List of Attachments

Figure 1 Operational Daytime Noise Contour

Figure 2 Operational Night-Time Noise Contour

Figure 3 Flare Noise Contour – Terminal Blowdown

Figure 4 Flare Noise Contour – Offshore Pipeline Depressurisation

Figure 5 Flare Noise Contour – Onshore Pipeline Depressurisation

Figure 6 Flare Noise Contour – Plant Start-up (worst case)

Figure 7 Flare Noise Contour – Compressor Purge (Cold Vent)

Figure 8 Height Contour and Identified Evergreen Foliage Areas

Figure 9 NSL Identification and Location

Appendix A Source Power Levels

Appendix B Partial Receiver Levels – Operational Noise

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

BELLANABOY BRIDGE GAS TERMINAL

Operational Noise Emission Models Page 1 of 6

1. INTRODUCTION

The purpose of the modelling report is to accompany Shell E&P Ireland Ltd's application

for a review of the Industrial Emissions licence (EPA ref. no_0738-01) for the Bellanaboy

Bridge Gas Terminal site.

The report includes the most up=to-date design information as a result of detailed design

work since 2004. Detailed information on the model inputs is contained in Table A,

attached. The noise models presented in this report were developed afresh in 2010 from

plot layouts and input data made available by the engineering designer (AMEC), and this

has replaced the previous (pre-2004) noise emissions models for the site.

The revised modelling incorporates design changes and equipment updates that have

taken since the 2004 IPPC licence application, and which includes the addition of Waste

Heat Recovery on the gas compressor turbines, Selective Catalytic Reduction and

additional ventilation to the power generation equipment, plus additional pumps

required to facilitate the discharge of treated produced water through spare cores in the

umbilical bundle serving the offshore wells. Process valve noise emissions have been fully

reviewed and there has been addition of a diaphragm pump serving a new methanol

pump lube oil supply.

2. NOISE MODELLING METHODOLGY

To calculate noise emissions from the proposed terminal site, noise propagation has been

calculated using ISO96131 algorithms implemented within the Datakustic software,

CadnaA. This allows meteorological, air absorption, ground absorption and topographical

effects to be considered in detail, enabling for field predictions of noise emissions to the

environment to be modelled with known precision.

Noise levels emitted from the site will be relatively constant with the majority of plant

items running continuously. Some items that run intermittently contribute less to the

overall noise levels, but may be likely to attract attention during start up and shut down.

All such plant items are assumed to run continuously to offset this effect, and provide a

robust assessment.

1

ISO 9613 Acoustics - Attenuation of sound during propagation outdoors - Part 1: Calculation of the absorption of sound by

the atmosphere and Part 2: General method of calculation.’

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

CLARKE SAUNDERS ASSOCIATES 7648.140128.ENMrev03 16/04/2014

BELLANABOY BRIDGE GAS TERMINAL

Operational Noise Emission Models Page 2 of 6

2.1 Meteorological Conditions

The calculations have been undertaken assuming standard downwind propagation in all

directions, temperature and humidity were set to 10°C and 70% respectively.

Attenuation due to foliage has been included through the identified areas of evergreen

woodland only.

2.2 Calculation Assumptions

The majority of plant items have been modelled as point sources. Process valves and

associated pipe lengths have also been modelled as point sources for these far-field noise

emissions calculations. Area sources have been used for modelling noise emissions from

some buildings.

Where building walls have been modelled using point sources, the source has been

assumed to be in the centre of the wall.

Refer to Appendix A, attached for further details on the noise sources.

2.3 Operation Scenarios

The scenarios considered in this study are for daytime & evening (07:00-19:00 & 19:00-

23:00) and night-time (23:00-0700) operation.

Some emergency equipment has been included in the daytime and evening model to

allow for maintenance test runs. These items have been advised by AMEC and can be

identified in Appendix A, attached.

Items which are likely to be intermittently run for short periods have been assumed to be

running continuously. If the period could occur during the night-time, then continuous

operation has been assumed through the night-time period.

2.4 Flaring Scenarios

The different types of flaring scenarios have been considered in this assessment as a

separate exercise.

The flare sound power levels are determined from published empirical methods on the

basis of maximum gas flow rate, jet aerodynamics, density and calorific value of the

constituent gas. Noise levels are initially steady at the stated maximum level as the

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

CLARKE SAUNDERS ASSOCIATES 7648.140128.ENMrev03 16/04/2014

BELLANABOY BRIDGE GAS TERMINAL

Operational Noise Emission Models Page 3 of 6

maximum flow rate is maintained, followed by decrease as the remainder of the gas

volume is released. The sound power levels detailed below are based upon the peak flow

rate.

Scenario Peak Mass Flow Rate

kg/s

Sound Power Level

LwA dB

Terminal Blowdown 82 154

Offshore Pipeline Depressurisation 47 150

Onshore Pipeline Depressurisation 12 140

Plant Startup (Worst Case) 33 147

Compressor Purge (Cold Vent) <5 <86

Ground Flare (included in operational noise calculations)

2.5 106

Table 2.4 – Flare Source Data

The noise emissions from the flare tip have assumed to be omni-directional for all cases.

In reality there is expected to be a degree of directionality which would result in slightly

lower imission levels at nearby properties, especially during cold venting. This is therefore

considered to represent a robust assessment.

2.5 Ground Flare

Use of the maintenance ground flare was previously considered as a separate scenario in

the previous noise assessments. The most recent estimation of the ground flare sound

power level, which takes into consideration the surrounding shroud and up to date

technical information, is 106dB LWA at the maximum 2.5kg/s mass flow rate.

Information is now also available on the spectral content of the ground flare as a noise

source, enabling frequency dependant screening and air absorption losses to be included

in the noise propagation model, enabling a more realistic prediction than those previously

based only on geometric dispersion losses.

Although the process is designed for daytime and evening use only, operation of the

ground flare would be theoretically possible during the night-time.

This has therefore now been included in the operational noise calculations as a

continuous source running during all periods, however, it has also been included in this

summary of flare scenarios for clarity.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

CLARKE SAUNDERS ASSOCIATES 7648.140128.ENMrev03 16/04/2014

BELLANABOY BRIDGE GAS TERMINAL

Operational Noise Emission Models Page 4 of 6

3. CALCULATION RESULTS

3.1 Operational Noise

The results of the noise models are illustrated graphically in the noise map plots in the

attached figures. Partial levels at the nearest noise sensitive location (NSL) to the south

(No. 6) are shown in Appendix B, to establish the contribution from each plant item.

All nearby noise sensitive locations previously identified have been included. The

locations are detailed in Figure 9, attached. For the operational noise contours, only the

very nearest locations have been illustrated in the figures.

The calculated levels at the nearest NSL’s are summarised below for daytime, evening and

night-time scenarios, including the relevant noise ELVs set in the existing licenceand EPA

Noise Guidance Note (NG4) for comparison. Levels at the boundary of the site footprint

are also included.

NSL ID LAeq,T Coordinates

Daytime Evening* Night-time X Y

(dBA) (dBA) (dBA) (m) (m)

Emission Limit Values 45 40 35 - -

1 32.2 32.2 31.5 85609 332096

2 31.5 31.5 30.9 85740 332158

3 34.7 34.7 34.2 86206 332355

4 34.7 34.7 34.2 86217 332374

5 34.5 34.5 34.2 86297 332454

6 33.4 33.4 32.9 86329 332504

7 33.6 33.6 33.3 86269 332442

8 31.5 31.5 31.0 86072 331945

9 31.1 31.1 30.5 86054 331890

10 30.8 30.8 30.2 86025 331861

11 29.8 29.8 29.3 85991 331736

12 30.4 30.4 29.8 86003 331813

13 25.1 25.1 24.2 87261 331219

14 30.9 30.9 29.8 85033 332199

15 28.1 28.1 27.0 85350 334488

16 29.9 29.9 28.8 85535 334368

17 31.5 31.5 30.2 85845 334413

18 31.0 31.0 29.5 85875 334514

19 28.1 28.1 27.2 85498 334487

20 31.2 31.2 30.0 85816 334430

21 26.5 26.5 25.7 88494 334171

22 25.8 25.8 25.0 88612 334248

23 25.1 25.1 242 88666 334239

24 24.2 24.2 23.1 88704 334227

25 25.1 25.1 24.3 88777 334244

Table 3.1 – Predicted Operational Noise Levels

*Evening (1900-2300) has been included in line with EPA’s revised Noise Guidance Note (NG4). Operation and maintenance scenarios for this period have been assumed to be the same as daytime (0700-1900) to provide a robust assessment. Operationally, however, it is likely that less maintenance activity would be conducted during the evening period, providing an increased compliance margin.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

CLARKE SAUNDERS ASSOCIATES 7648.140128.ENMrev03 16/04/2014

BELLANABOY BRIDGE GAS TERMINAL

Operational Noise Emission Models Page 5 of 6

3.2 Further Site Sources

As well as the main noise producing items identified throughout the design and

assessment processes, the contribution of many other lesser noise sources has been

included with the detailed information now available for the less significant, but

contributory, systems which must still be borne in mind in the implementation of future

engineering design changes to ensure that the overall noise emissions criterion is met.

Any such items, in combination, would need to contribute less than 29dB(A) at the

nearest NSL’s for the site to comply with the ELVs and this should be treated as the final

noise budget against which to assess any remaining or proposed sources.

3.3 Flare Noise

Noise contour plots for each flare scenario are shown in the attached figures and receiver

levels at the nearest NSL, No.6 (approximately 615m from the flare stack), are

summarised below.

These levels are the peak LAeq levels which would occur when the flare is operating at the

maximum flow rates. The maximum initial flow rate would occur for a typical duration

indicated in the table below. After this, it would reduce to below 50% of the peak flow

rate, resulting in reduced noise emissions.

Scenario Level at nearest NSL (no. 6) LAeq,T

Duration of Flow

Duration above 50% of Peak Flow rate

Terminal Blowdown 83 dB 15 minutes 9 minutes

Offshore Pipeline Depressurisation1

79 dB 16 hours 5 hours

Onshore Pipeline Depressurisation1

69 dB 5.5 hours 3 hours

Plant Startup (Worst Case) 76 dB 1 hour 1 hour

Compressor Purge (Cold Vent) <14 dB 10 minutes 5 minutes

Cold venting of Stopped Compressor during compressor changeovers

14 dB 8 minutes 3 minutes

Table 3.3 – Predicted Flare Noise Levels 1The indicated duration is based on the inventory of the proposed onshore pipeline route, minor deviations in the route will result in

minor changes to the duration of the event, however it should not change the resulting noise levels

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

CLARKE SAUNDERS ASSOCIATES 7648.140128.ENMrev03 16/04/2014

BELLANABOY BRIDGE GAS TERMINAL

Operational Noise Emission Models Page 6 of 6

4. CONCLUSIONS

Based on the most up to date information on the Terminal design, the calculations

undertaken demonstrate that when operational the Terminal is capable of meeting the

Industrial Emissions licence and EPA NG4 noise limits, providing provision is made during

final design and installation to ensure that the number of small sources such as valves and

piping are controlled to be within their allocated noise budget.

Noise levels at the nearest noise sensitive locations have been calculated for differing

operational and flaring scenarios during daytime, evening and night-time. The predicted

noise levels for each scenario have also been presented as noise contour plots.

CLARKE SAUNDERS ASSOCIATES

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

FIGURES

Noise Contour Plots

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 1: Operational Daytime Noise Contour

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 2: Operational Night-Time Noise Contour

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 3: Flare Noise Contour – Terminal Blowdown

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 4: Flare Noise Contour – Offshore Pipeline Depressurisation

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 5: Flare Noise Contour – Onshore Pipeline Depressurisation

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 6: Flare Noise Contour – Plant Start-up (worst case)

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 7: Flare Noise Contour – Compressor Purge (Cold Vent)

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 8: Height Contour and Identified Evergreen Foliage Areas

Ground Height (m)

Foliage

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Figure 9: NSL Identification and Location

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

APPENDIX A.1 - Point Sources

Name ID

Lw X Y Z

(dBA) (m) (m) (m) (m)

GPB Generation Cell Hot Inlet B1_FD10 75.6 On 5.4 r 86506 332981.4 37.4

GPB Generation Cell Hot Inlet B1_FD9 75.6 On 5.4 r 86482.2 332968.2 37.4

GPB Generation Extract EF1 B1_HV_EF1 86.4 On 6.4 r 86491.4 332956.9 38.4

GPB Generation Extract EF3 B1_HV_EF3 77.6 On 7.4 r 86494.4 332958.1 39.4

GPB Generation Extract SF1 B1_HV_SF1 78.6 On 7.4 r 86508.5 332965.9 39.4

GPB Generation Extract SF3 B1_HV_SF3 69.6 On 7.4 r 86500.8 332961.7 39.4

GPB HVAC Room South Wall B1X10SWall 59.4 On 9.4 r 86501.1 332962.2 41.4

GPB HVAC Room West Wall B1X14WWal 55.6 On 7.9 r 86487.1 332959.3 39.9

GPB HVAC Room Roof B1X4_Roof 63.6 On 10.9 r 86499.2 332965.5 42.9

GPB Switch Room - East Wall B1X7EWall 51.8 On 4.4 r 86511.1 332972.2 36.4

GPB HVAC Room - East Wall B1X8_EWall 55.6 On 9.8 r 86511.3 332971.8 41.8

GPB Switch Room - West Room B1X8WWal 51.8 On 3.4 r 86487.5 332958.7 35.4

GPB Switch Room - South Wall B1X9_SWall 57.8 On 4.4 r 86500.6 332961.9 36.4

SGC Building - Main Access B2_D1 77.4 On 2.9 r 86483.52 333190.88 34.9

SGC Building - HVAC Room B2HV_Ewall 67.9 On 5.4 r 86470.9 333193.1 37.4

SGC Building - HVAC Room B2HV_Roof 68.9 On 7.4 r 86468.1 333190.8 39.4

SGC Building - HVAC Room B2HV_Wwall 69 On 5.4 r 86464.86 333190.66 37.4

SGC Building - HVAC Extract B2HVACextr 92.2 On 2.9 r 86465.9 333184.5 34.9

SGC Building - HVAC Supply B2HVACin 87.7 On 2.9 r 86470.7 333198.5 34.9

Local Equipment Room Supply SF5 B99_HV_EF5 86.5 On 5.2 r 86511.5 333090.9 37.2

Local Equipment Room Extract EF5 B99_HV_SF5 79.5 On 1.9 r 86508.4 333096.5 33.9

SGC A - Suction KO Drum D2009A 82.6 On 4.9 r 86474.5 333155.8 36.9

SGC A - Gas Turbine Oil Cooler E2002A 87.4 On 3.9 r 86466.5 333180.1 35.9

S/G COMP.LUBE OIL COOLER E-2008A 97.8 On 33.7 a 86469.62 333177 33.7

CONDENSATE COOLER E-3002 94.9 On 46.9 a 86495.21 333156.05 46.9

LP GAS COMP. AFTERCOOLER E-3003A 97.8 On 36.52 a 86471.81 333129.94 36.52

HEATING MED. DUMP COOLER E-5001 96.8 On 33.7 a 86552.08 333174.11 33.7

Generator C Mixture Cooler E8801C 79.1 On 3.9 r 86481.4 332982.7 35.9

Generator C Jacket Cooler E8805C 83.3 On 3.9 r 86484.7 332979.8 35.9

TRANSFORNER 'A' ETR-320A 95.8 On 34.49 a 86503.93 333079.92 34.49

TRANSFORMER 'B' ETR-320B 95.8 On 34.49 a 86499.56 333077.49 34.49

FWPHExhaust FWPHex 110.3 Off 8 r 86435.88 332911.07 40

FWPHExhaust FWPHex 110.3 Off 8 r 86440.73 332913.69 40

Generator B Exhaust G8801B 86.2 On 15.9 r 86488.1 332978.1 47.9

Generator C Exhaust G8801C 86.2 On 15.9 r 86480.7 332974 47.9

Emergency Generator Enclosure G8802_encl 101.9 Off 2.9 r 86508.4 332988.6 34.9

Emergency Generator Exhaust G8802_Exh 103.2 Off 4.9 r 86511.1 332983.7 36.9

SGC Turbine A Intake K2002A__X1 83.9 On 6.9 r 86474.1 333193.5 38.9

SGC Turbine A Exhaust K2002A_X2 85.9 On 20.9 r 86481.7 333179.9 52.9

SGC Turbine A Ventilation K2002A_X4 78.3 On 3.9 r 86475.3 333189.4 35.9

Backwash Air Blower K8301 86.9 On 2.1 r 86446.7 333072.1 34.1

OFFSHORE TERMINATION UNIT N-1010 97.2 On 33.7 a 86231.53 333061.36 33.7

ODOURISATION PACKAGE N-2002 97.2 On 33.55 a 86299.02 332940.12 33.55

METHANOL STILL SCALE INHIBITOR N-4001 95.8 On 33.7 a 86324.21 333093.06 33.7

GROUND FLARE N8111 105.9 On 34.8 a 86554.59 333042.17 34.8

OIL SKIMMER N-8303 97.2 On 33.6 a 86451.51 333036.03 33.6

Air Package N-8501 89.8 On 8 r 86507.99 332929.93 40

NITROGEN PACKAGE N-8601A 90.2 On 33.7 a 86513.9 332940.6 33.7

Chlorination Package N8902 84.2 On 2.1 r 86525.5 332939.2 34.1

CORROSION INHIBITOR PACKAGE N-9001 97.2 On 33.7 a 86236.37 333066.55 33.7

CONDENSATE LOADING PUMP P-3001A 86.4 On 34.01 a 86350.28 333073.56 34.01

LP CONDENSATE PUMP P-3002B 85.7 On 34.02 a 86346.21 333080.9 34.02

CONDENSATE TRANSFER PUMP P-3004A 83.7 On 34.3 a 86491.12 333145.22 34.3

OFFSPEC CONDENSATE PUMP P-3005 85.7 On 34.02 a 86340.78 333090.7 34.02

METHANOL FEED PUMP P-4001A 85.7 On 34.02 a 86336.32 333067.65 34.02

WASTE WATER PUMP P-4002A 81.4 On 34.06 a 86501.66 333151.06 34.06

METHANOL REFLUX PUMP P-4003A 82.7 On 34.06 a 86517.26 333145.61 34.06

W/HEAD METH INJ PUMP P-4004 90.2 Off 33.7 a 86275.45 333069.12 33.7

W/HEAD METH INJ PUMP P-4005A 95.2 On 33.7 a 86276.78 333066.71 33.7

W/HEAD METH INJ PUMP P-4006A 84.2 On 33.7 a 86280.05 333060.81 33.7

METHANOL EXPORT BOOSTER PUMP P-4009A 82.9 On 34.02 a 86372.01 333034.15 34.02

HEATING MEDIUM TRAMSFER PUMP P-5001 88.2 On 34.13 a 86561.1 333172.24 34.13

HEATING MEDIUM CIRC. PUMP P-5002A 93.5 On 34.22 a 86558.23 333182.05 34.22

PRODUCED WATER CPI FEED PUMP P6001A 85.9 On 2.1 r 86446.3 333072.9 34.1

SAND FILTER FEED PUMP P6004A 84.9 On 2.1 r 86455.6 333079.1 34.1

TREATED PROD WATER SUMP PUMP P-6005A 82.1 On 33.63 a 86458.15 333053.2 33.63

Oil Transfer Pump P-6007 79.2 On 34.4 a 86457.8 333070.8 34.4

UF Recirculation Pump P-6008 85.2 On 34.4 a 86453.93 333078.06 34.4

Lime Slurry Recirculation Pump P-6015A 86.2 On 34.4 a 86444.2 333073.6 34.4

TREATED PROD WATER INJECTION PUMP P-6025A 85.7 On 33.7 a 86252.84 333084.41 33.7

TREATED PROD WATER INJECTION PUMP P-6026A 85.7 On 33.7 a 86250.83 333082.34 33.7

CLOSED DRAINS DRUM PUMP P-8201A 90.2 On 30.9 a 86456.6 333041.8 30.9

HEATING MED. CLOSED DRAIN PUMP P-8202 81.1 On 34.06 a 86540.19 333170.25 34.06

ROAD DRAINAGE SUMP PUMP P-8203 84.2 On 30.05 a 86819.73 333053.27 30.05

CLOSED DRAIN DRUM SUMP PUMP P-8204 74.2 On 28.63 a 86460.93 333046.74 28.63

DRAIN WATER SUMP PUMP P-8205A 77.3 On 33.58 a 86403.68 332849.19 33.58

TREATED WATER SUMP PUMP P-8301A 88.2 On 33.63 a 86479.6 333035.7 33.63

TREATED PROD WATER BOOSTER PUMP P-8302A 77.3 On 33.6 a 86456.2 333045.72 33.6

OIL SUMP PUMP P-8303 83.7 On 33.7 a 86479.6 333035.7 33.7

FIREWATER TRANSFER PUMP P-8304 95.2 On 33.63 a 86478.11 333017.61 33.63

MULTIMEDIA FILTER FEED PUMP P-8305A 90.2 On 33.98 a 86471.79 333047.16 33.98

SURFACE WATER TPS FEED PUMP P-8306A 97.2 On 33.63 a 86475.69 333021.98 33.63

SURFACE WATER PUMP 'A' P-8307A 87.2 On 33.95 a 86465.2 333060.68 33.95

PRODUCED WATER PUMP P-8308 75.2 On 34.4 a 86446.3 333072.9 34.4

FIREWATER TRANSFER PUMP P-8314 95.2 Off 33.63 a 86478.62 333016.69 33.63

FIREWATER PUMP P-8701A 102.2 Off 33.13 a 86440.48 332904.43 33.13

FIREWATER JOCKEY PUMP P-8702A 95.3 On 33.01 a 86443.64 332908.18 33.01

FIREWATER JOCKEY PUMP P-8702B 95.3 On 33.01 a 86458.51 332916.42 33.01

FIRE WATER SUMP PUMP P-8703 97.2 On 32.51 a 86445.84 332924.38 32.51

DIESEL DISTRIBUTION PUMP P-8801 79.1 On 33.55 a 86491.1 332933.53 33.55

UREA SOLUTION TRANSFER PUMPS P-8811A/B 97.2 On 33.92 a 86467.42 332968.3 33.92

POTABLE WATER PUMP P-8901A 97.2 On 33.7 a 86528.03 332948.89 33.7

APPENDIX A - SOURCE POWER LEVELS

Result. PWL Height Coordinates

Night time status

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

SERVICE WATER PUMP P-8902A 97.2 On 33.7 a 86520.95 332946.34 33.7

FV-3005 V&P 80.4 On 34 a 86410.15 333045.93 34

PV-3079 V&P 86 On 34 a 86473.1 333132.04 34

PV-3029 V&P 86 On 34 a 86471.7 333131.26 34

LV-1016 V&P 75.3 On 47.5 a 86469.78 333144.83 47.5

FV-1005 V&P 84 On 47.4 a 86467.94 333143.82 47.4

FV-4010 V&P 90 On 34.5 a 86250.27 333064.77 34.5

FV-4011 V&P 89 On 34.5 a 86249.69 333065.82 34.5

FV-4012 V&P 89 On 34.5 a 86249.11 333066.87 34.5

FV-4013 V&P 89 On 34.5 a 86248.52 333067.92 34.5

LV-1006 V&P 76.3 On 34.1 a 86455.22 333165.22 34.1

PV-1009 V&P 86 On 39.7 a 86452.25 333170.68 39.7

PV-1021 V&P 79.7 On 34.6 a 86234.39 333051.96 34.6

PV-1038 V&P 84.8 On 39.7 a 86451.2 333170.1 39.7

PV-4021 V&P 79.3 On 34.2 a 86273 333067.08 34.2

PV-4026A V&P 79.3 On 34.2 a 86274.84 333063.76 34.2

PV-4033 V&P 79.3 On 34.2 a 86278.04 333057.98 34.2

FV-8701 V&P 76.9 On 33.6 a 86436.81 332905.43 33.6

FV-8702 V&P 91 On 33.6 a 86444.25 332909.55 33.6

FV-8703 V&P 90 On 33.6 a 86451.68 332913.68 33.6

FV-8704 V&P 76.3 On 33.6 a 86459.12 332917.8 33.6

FV-4008 V&P 91 On 34 a 86507.57 333157.1 34

FV-4009 V&P 95.4 On 34 a 86509.14 333157.97 34

FV-4014 V&P 91 On 33.8 a 86332.45 333072.25 33.8

LV-3002B V&P 90 On 34 a 86518.84 333155.11 34

LV-3009 V&P 88 On 34 a 86462.04 333146.83 34

LV-4008A V&P 90 On 34.1 a 86484.17 333131.77 34.1

LV-4008B V&P 74.3 On 34.1 a 86483.68 333131.58 34.1

LV-4016 V&P 90 On 34.1 a 86501.97 333144.58 34.1

PV-3005B V&P 88 On 34.1 a 86472.96 333128.99 34.1

PV-3005C V&P 74.3 On 34.1 a 86474.36 333129.77 34.1

PV-4013B V&P 74.3 On 34 a 86515.79 333161.65 34

PV-4042A V&P 77.9 On 34 a 86495.88 333149.59 34

PV-4042B V&P 76.9 On 34 a 86495.32 333149.27 34

PV-5001A V&P 58 On 59.5 a 86545.36 333179 59.5

PV-5001B V&P 83 On 59.5 a 86544.26 333178.47 59.5

PV-8116 V&P 77.9 On 42.5 a 86526.18 333041.64 42.5

PV-8407 V&P 71.7 On 47.5 a 86536.48 333171.98 47.5

PV-8505 V&P 81.6 On 33.9 a 86498.13 332941.48 33.9

PV-3002B V&P 74.3 On 33.9 a 86535.16 333168.16 33.9

PV-3005A2 V&P 76.3 On 47.6 a 86478.68 333140.74 47.6

PV-4001A2 V&P 89.8 On 34 a 86481.93 333139 34

PV-4001B2 V&P 77.9 On 34 a 86483.39 333136.37 34

PV-8603 V&P 76.9 On 33.9 a 86514.73 332944.74 33.9

LV-3002A V&P 77.9 On 34 a 86518.27 333154.91 34

PV-3002A V&P 92 On 33.9 a 86518.17 333158.4 33.9

PV-3005A1 V&P 88 On 47.6 a 86479.17 333140.67 47.6

PV-4001A1 V&P 94 On 34 a 86482.18 333139.36 34

PV-4001B1 V&P 90 On 34.1 a 86483.78 333136.48 34.1

PV-4013A V&P 77.7 On 34 a 86511.16 333159.08 34

PV-4026B V&P 88 On 34.2 a 86273.79 333063.17 34.2

PV-3022A V&P 82.4 On 44.4 a 86358.35 333109.09 44.4

PV-3022B V&P 82.4 On 44.4 a 86359.09 333108.66 44.4

PV-3037A V&P 91 On 44.4 a 86375.4 333078.33 44.4

PV-3037B V&P 91 On 44.4 a 86374.66 333078.54 44.4

PV-3039A V&P 82.4 On 44.4 a 86367 333093.12 44.4

PV-3039B V&P 82.4 On 44.4 a 86366.28 333093.31 44.4

PV-4064A V&P 90 On 44.4 a 86324.8 333035.96 44.4

PV-4064B V&P 90 On 44.4 a 86324.62 333034.97 44.4

PV-4066A V&P 91 On 44.4 a 86313.07 333056.58 44.4

PV-4066B V&P 91 On 44.4 a 86312.88 333055.33 44.4

PV-4068A V&P 77.4 On 44.4 a 86301.69 333077.09 44.4

PV-4068B V&P 77.4 On 44.4 a 86301.38 333075.63 44.4

PV-4070A V&P 90 On 44.4 a 86393.62 333038.01 44.4

PV-4070B V&P 92 On 44.4 a 86394.05 333038.25 44.4

PV-4072A V&P 85 On 44.4 a 86386.62 333051.66 44.4

PV-4072B V&P 85 On 44.4 a 86386.03 333051.34 44.4

FV-1004A V&P 93.5 On 47 a 86474.98 333141.35 47

TV-5005 V&P 69.7 On 34 a 86547.28 333179.11 34

PV-9003 V&P 67.7 On 34.7 a 86235.91 333067.78 34.7

HV-1010 V&P 78 On 47.3 a 86276.66 333060.88 47.3

HV-2001 V&P 84 On 47.5 a 86281.22 333051.82 47.5

HV-2002 V&P 69.7 On 47.2 a 86277.7 333050.29 47.2

LV-1002 V&P 78 On 34.1 a 86447.72 333162.34 34.1

LV-2010 V&P 83 On 33.9 a 86523.71 333191.31 33.9

PV-2010 V&P 83 On 41.5 a 86532.27 333199.37 41.5

PV-2011 V&P 83 On 41.5 a 86529.46 333194.96 41.5

PV-8401 V&P 87.1 On 34 a 86523.57 333165.97 34

PV-8408 V&P 84.8 On 34 a 86524.3 333164.66 34

FV-3004 V&P 83 On 33.8 a 86335.79 333101.08 33.8

FV-4005 V&P 80.7 On 34 a 86507.69 333148.02 34

FV-4007 V&P 81.7 On 34.1 a 86512.11 333146.01 34.1

FV-4018 V&P 79.3 On 52.1 a 86502.67 333149.23 52.1

LV-2002 V&P 79.3 On 34 a 86475.68 333153.37 34

LV-2052 V&P 83 On 34 a 86520.2 333178.05 34

LV-3004 V&P 81.7 On 33.9 a 86519.76 333156.76 33.9

LV-4001 V&P 81.7 On 34 a 86488.43 333135.74 34

PV-8405 V&P 81.7 On 34 a 86532.02 333170.54 34

PV-8406 V&P 83.7 On 34 a 86532.75 333169.22 34

PV-8905 V&P 85.8 On 33.8 a 86528.78 332943.72 33.8

TV-3002B V&P 81.8 On 34 a 86515.58 333152.96 34

LV-8901 V&P 89.8 On 33.8 a 86525.6 332946.99 33.8

TV-2014 V&P 81.8 On 34 a 86516.8 333190.57 34

TV-3002A V&P 81.8 On 34 a 86516.04 333152.76 34

LV-2006 V&P 81.8 On 34 a 86522.71 333187.33 34

FV-2054 V&P 82.8 On 47.5 a 86502.47 333168.56 47.5

FV-2004 V&P 82.8 On 47.5 a 86491.1 333162.26 47.5

FV-4027 V&P 82.8 On 35.8 a 86252.88 333065.42 35.8

FV-4028 V&P 88 On 35.8 a 86251.96 333067.08 35.8

FV-4029 V&P 86 On 35.8 a 86251.38 333068.13 35.8

FV-4030 V&P 87 On 35.8 a 86250.7 333069.37 35.8

FV-4031 V&P 91 On 35.8 a 86250.17 333070.39 35.8

LV-2017 V&P 85 On 34.1 a 86525.81 333212.21 34.1

LV-2021 V&P 87 On 34.5 a 86525.55 333207.44 34.5

Generator B Mixture Cooler E8801B 79.1 On 3.9 r 86489.8 332987.4 35.9

Generator B Jacket Cooler E8805B 83.3 On 3.9 r 86492.2 332983.9 35.9

Diaphragm Pump P4011 88.2 On 1 r 86277.87 333063.78 33

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

APPENDIX A.2 - Area Sources

Name ID Result. PWL Result. PWL'' Night time status

Lw Lw''

(dBA) (dBA)

LP Gas Comp Roof LPCASR 86.3 73.6 On

Waste Water Building Roof WWBR 82.2 58.7 On

Sales Gas Roof B2 98.8 70.3 On

Sales Gas Aftercooler E2005 99.8 79.3 On

Methanol E4002 94.9 79.3 On

Firewater Building Roof Fire 91.8 67.1 Off

Gen Building Roof B1X1R 81.7 56.9 On

LP COMPRESSOR SUC LPCOMPSUC 94.2 84.8 On

LP Comp Casing Wall LPCOMPW 86.5 73.5 On

LP Comp Casing Wall LPCASW 86.5 73.5 On

Lp Comp Discharge LPCOMPDIS 94.2 84.8 On

Waste Water Building Walls WWBW 87.6 58.7 On

Sales Gas Building Walls B2 101.8 70.3 On

FIREWATER BUILDING WALLS Fire 94.8 67.1 Off

FIREWATER DOOR Fire 89.7 77.1 Off

Gen Building East Wall B1X1EW 100 81.7 On

Gen Building North Wall B1X1NW 103.5 81.4 On

Gen Building West Wall B1X1WW 81.7 63.4 On

Gen Building Door B1X1D2 87.4 76 On

Gen Building Door B1X1D2 87.4 76 On

Gen Building Louvre B1X1L1 87.5 87.4 On

Gen Building Louvre B1X1L1 87.5 87.4 On

APPENDIX A - SOURCE POWER LEVELS

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

APPENDIX B - PARTIAL RECEIVER LEVELS

APPENDIX B.1 - Partial Levels at Worst Case Receiver (3)

Receiver Level dB(A)

Source Name ID Day Night

TOTAL LEVEL 34.7 34.2

Sales Gas Roof B2 23.8 23.8

Sales Gas Building Walls B2 23.8 23.8

ODOURISATION PACKAGE N-2002 22.3 22.3

LP GAS COMP. AFTERCOOLER E-3003A 21.5 21.5

GROUND FLARE N8111 20.7 20.7

Gen Building North Wall B1X1NW 20.1 20.1

OFFSHORE TERMINATION UNIT N-1010 19.7 19.7

CORROSION INHIBITOR PACKAGE N-9001 19.7 19.7

TRANSFORMER 'B' ETR-320B 19.4 19.4

FIREWATER BUILDING Fire 19

FIREWATER BUILDING Fire 19

LP COMPRESSOR SUC LPCOMPSUC 18.9 18.9

HEATING MED. DUMP COOLER E-5001 18.4 18.4

W/HEAD METH INJ PUMP P-4005A 18 18

Sales Gas Aftercooler E2005 17.7 17.7

TRANSFORNER 'A' ETR-320A 17.4 17.4

Gen Building East Wall B1X1EW 17.2 17.2

FV-4009 V&P 15.7 15.7

FWPHExhaust FWPHex 15.6

FV-1004A V&P 15.1 15.1

SURFACE WATER TPS FEED PUMP P-8306A 15 15

OIL SKIMMER N-8303 14.8 14.8

PV-4070B V&P 14.7 14.7

FWPHExhaust FWPHex 14.5

PV-4066A V&P 13.7 13.7

PV-4066B V&P 13.7 13.7

FV-4031 V&P 13.6 13.6

PV-3037A V&P 13.3 13.3

PV-3037B V&P 13.3 13.3

Emergency Generator Exhaust G8802_Exh 13.1

W/HEAD METH INJ PUMP P-4004 12.9

PV-4064A V&P 12.9 12.9

PV-4064B V&P 12.9 12.9

CONDENSATE COOLER E-3002 12.8 12.8

FV-4010 V&P 12.7 12.7

PV-4070A V&P 12.7 12.7

Methanol E4002 12.6 12.6

HEATING MEDIUM CIRC. PUMP P-5002A 12.3 12.3

FV-4008 V&P 11.8 11.8

FV-4011 V&P 11.6 11.6

FV-4012 V&P 11.6 11.6

FV-4013 V&P 11.6 11.6

PV-4001A1 V&P 11.3 11.3

S/G COMP.LUBE OIL COOLER E-2008A 11.2 11.2

MULTIMEDIA FILTER FEED PUMP P-8305A 11.1 11.1

LV-4008A V&P 11.1 11.1

LP Gas Comp Roof LPCASR 11.1 11.1

LP Comp Casing Wall LPCOMPW 11.1 11.1

LV-4016 V&P 11 11

PV-3002A V&P 10.9 10.9

Diaphragm Pump P4011 10.9 10.9

POTABLE WATER PUMP P-8901A 10.8 10.8

PV-4026B V&P 10.7 10.7

FV-4028 V&P 10.7 10.7

Generator C Exhaust G8801C 10.5 10.5

SERVICE WATER PUMP P-8902A 10.5 10.5

Generator B Exhaust G8801B 10.4 10.4

Waste Water Building Walls WWBW 10.1 10.1

Gen Building West Wall B1X1WW 9.9 9.9

FV-4030 V&P 9.6 9.6

Lp Comp Discharge LPCOMPDIS 9.6 9.6

SGC Turbine A Exhaust K2002A_X2 9.4 9.4

Backwash Air Blower K8301 9.3 9.3

PV-3005A1 V&P 9.1 9.1

LV-3002B V&P 8.8 8.8

CONDENSATE LOADING PUMP P-3001A 8.7 8.7

TREATED PROD WATER INJECTION PUMP P-6025A 8.7 8.7

TREATED PROD WATER INJECTION PUMP P-6026A 8.7 8.7

FIREWATER TRANSFER PUMP P-8304 8.7 8.7

FV-4029 V&P 8.7 8.7

FIREWATER TRANSFER PUMP P-8314 8.6

PV-1009 V&P 8.1 8.1

FIREWATER DOOR Fire 8.1

SURFACE WATER PUMP 'A' P-8307A 7.9 7.9

Waste Water Building Roof WWBR 7.9 7.9

Gen Building Roof B1X1R 7.9 7.9

PV-4072A V&P 7.6 7.6

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

PV-4072B V&P 7.6 7.6

LV-2021 V&P 7.4 7.4

SAND FILTER FEED PUMP P6004A 7.3 7.3

TREATED WATER SUMP PUMP P-8301A 7.2 7.2

PV-4001A2 V&P 7.2 7.2

W/HEAD METH INJ PUMP P-4006A 7.1 7.1

SGC A - Gas Turbine Oil Cooler E2002A 7 7

PV-3029 V&P 6.9 6.9

PV-4001B1 V&P 6.9 6.9

Local Equipment Room Supply SF5 B99_HV_EF5 6.8 6.8

Emergency Generator Enclosure G8802_encl 6.8

HEATING MEDIUM TRAMSFER PUMP P-5001 6.8 6.8

PV-3079 V&P 6.8 6.8

HV-2001 V&P 6.7 6.7

PV-8401 V&P 6.6 6.6

GPB Generation Extract EF1 B1_HV_EF1 6 6

UF Recirculation Pump P-6008 6 6

METHANOL STILL SCALE INHIBITOR N-4001 5.7 5.7

LV-2017 V&P 5.3 5.3

FV-1005 V&P 5.2 5.2

Air Package N-8501 5 5

PV-1038 V&P 5 5

LV-8901 V&P 5 5

CONDENSATE TRANSFER PUMP P-3004A 4.9 4.9

GPB Generation Extract SF1 B1_HV_SF1 4.7 4.7

PV-3005B V&P 4.6 4.6

FV-4027 V&P 4.6 4.6

METHANOL EXPORT BOOSTER PUMP P-4009A 4.4 4.4

UREA SOLUTION TRANSFER PUMPS P-8811A/B 4 4

PV-2010 V&P 3.5 3.5

PV-2011 V&P 3.5 3.5

GPB Generation Extract EF3 B1_HV_EF3 3.3 3.3

PV-8406 V&P 3.1 3.1

NITROGEN PACKAGE N-8601A 3 3

LV-4001 V&P 2.9 2.9

OIL SUMP PUMP P-8303 2.7 2.7

PV-8408 V&P 2.7 2.7

FV-2004 V&P 2.7 2.7

LV-2010 V&P 2.6 2.6

FV-2054 V&P 2.6 2.6

PV-1021 V&P 2.5 2.5

LV-2052 V&P 2.5 2.5

TREATED PROD WATER SUMP PUMP P-6005A 2.4 2.4

PV-4033 V&P 2.4 2.4

PV-4026A V&P 2.3 2.3

PV-4021 V&P 2.2 2.2

SGC Building - HVAC Extract B2HVACextr 1.8 1.8

WASTE WATER PUMP P-4002A 1.8 1.8

PV-3039A V&P 1.4 1.4

PV-3039B V&P 1.4 1.4

PV-3022A V&P 1.2 1.2

PV-3022B V&P 1.2 1.2

TV-2014 V&P 1.2 1.2

PV-8405 V&P 1.1 1.1

LV-3004 V&P 0.7 0.7

FV-4014 V&P 0.6 0.6

HV-1010 V&P 0.6 0.6

FV-4007 V&P 0.5 0.5

GPB Generation Cell Hot Inlet B1_FD9 0.4 0.4

FV-4018 V&P 0.4 0.4

PV-8905 V&P 0.3 0.3

LP Comp Casing Wall LPCASW 0.3 0.3

LV-2006 V&P 0.2 0.2

Oil Transfer Pump P-6007 0 0

METHANOL REFLUX PUMP P-4003A -0.2 -0.2

FV-4005 V&P -0.3 -0.3

TV-3002B V&P -0.5 -0.5

TV-3002A V&P -0.5 -0.5

PV-5001B V&P -0.8 -0.8

FV-3005 V&P -0.9 -0.9

LV-1002 V&P -1 -1

HEATING MED. CLOSED DRAIN PUMP P-8202 -1.2 -1.2

SGC A - Suction KO Drum D2009A -1.3 -1.3

SGC Turbine A Intake K2002A__X1 -1.4 -1.4

LV-3009 V&P -1.5 -1.5

CLOSED DRAINS DRUM PUMP P-8201A -1.7 -1.7

Chlorination Package N8902 -1.9 -1.9

PV-4068A V&P -2.3 -2.3

PV-4068B V&P -2.3 -2.3

PV-8116 V&P -2.6 -2.6

ROAD DRAINAGE SUMP PUMP P-8203 -2.9 -2.9

SGC Building - HVAC Supply B2HVACin -3.1 -3.1

Gen Building Louvre B1X1L1 -3.1 -3.1

Generator C Mixture Cooler E8801C -3.2 -3.2

FIREWATER PUMP P-8701A -3.2

Gen Building Louvre B1X1L1 -3.3 -3.3

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Appendix F

Section E.2.2. Table E.6.

Summary of Proposed Discharge

to Surface Waters for points

SW1 and SW3

Attachment Table E.2 (i)

Emissions to Surface Water - for

points SW1 and SW3

Table I.2 (i) – Surface Water

Quality

Drawing E.2.1 Corrib

Bellanaboy Bridge Gas Terminal

Treated Water Discharge

Locations.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Table E.6 Summary of Proposed Discharge to Surface Waters

Emission Emission Ref Proposed

Discharge

Location

Emission Sampling

Location Ref

Grid Reference Source/

Monitoring Point

Treated Surface Water Runoff (from process areas)

SW1 Sea outfall ca. 12.7 km offshore from landfall

location (no

change)

SW1-S 54° 19.72’ -09° 59.46’

Uncontaminated surface water runoff

from Terminal

SW2 R314 Road Drainage Ditch to south-

west of site (no change)

SW2-S 08598 E 332363 N (ING)

Treated Produced Water

SW3 65 km offshore at well manifold in sea

SW3-S 54° 20.34’ -11° 03.51’

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

TABLE E.2(i): EMISSIONS TO SURFACE WATERS (One page for each emission)

Emission Point: SW3 Treated Produced Water

Emission Point Ref. No: SW3

Source of Emission: Treated Produced Water

Location of discharge : Corrib Manifold approximately 65km offshore (c 92.5km along the pipeline route from the Terminal)

Grid Ref. (12 digit, 6E,6N): 54º 20.34 '; -11º 03.51 ' (latitude and longitude co-ordinates are given due to offshore location)

Name of receiving waters and water body code:

Atlantic Ocean

Flow rate in receiving waters: Not applicable m3.sec-1 Dry Weather Flow

Not applicable m3.sec-1 95%ile flow

Available assimilative capacity:

Not available kg/day

Emission Details:

(i) Volume to be emitted

Normal/day 80 m3 Maximum/day 80 m3

Maximum rate/hour 3.33 m3

(ii) Period or periods during which emissions are made, or are to be made, including daily or seasonal variations (start-up /shutdown

to be included):

Periods of Emission (avg) 60 min/hr 24 hr/day 7 day/yr

80m

3/day maximum is proposed as a daily maximum discharge rate in the event it is possible to pump more water through the cores than the initial calculations suggest.

Actual discharge is likely to be in the region of 65m3/day.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

TABLE E.2(i): EMISSIONS TO SURFACE WATERS (One page for each emission)

Emission Point: SW1 Treated Surface Water from process areas

Emission Point Ref. No: SW1

Source of Emission: Treated Surface Water

Location of discharge : Outfall Pipe 12.7km offshore from landfall location

Grid Ref. (12 digit, 6E,6N): 54º 19.72 '; -09º 59.46 ' (latitude and longitude co-ordinates are given due to offshore location)

Name of receiving waters and water body code:

Atlantic Ocean

Flow rate in receiving waters: Not Applicable m3.sec-1 Dry Weather Flow

Not Applicable m3.sec-1 95%ile flow

Available assimilative capacity:

Not Available kg/day

Emission Details:

(i) Volume to be emitted

Normal/day 50 m3 Maximum/day 720 m3

Maximum rate/hour 30 m3

(ii) Period or periods during which emissions are made, or are to be made, including daily or seasonal variations (start-up

/shutdown to be included):

Periods of Emission (avg) 60 min/hr 24 hr/day 7 day/yr

80m3/day maximum is proposed as a daily maximum discharge rate in the event it is possible to pump more water through the cores than the initial calculations suggest.

Actual discharge is likely to be in the region of 65m3/day.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Table I.2(i) SURFACE WATER QUALITY

(Sheet 1 of 2) Monitoring Point/ Grid Reference: SW1/ 085982, 332363

Parameter Results

(mg/l)

Sampling

method2

(grab, drift etc.)

Normal

Analytical

Range2

Analysis method

/ technique

2 Aug 2007

Surface

2 Aug 2007

Near –bottom (89m)

21/22 July 08

Surface

21/22 July 08

Near –bottom (92m)

pH

Temperature 15.77 12.14 13.98 11.44 CTD probe CTD probe

Electrical conductivity EC

Salinity 35.1 35.2 34.9 35.1 CTD probe CTD probe

Total Ammonia as N <0.01 µg/ <0.01 µg/ <0.01 µg/ 0.022 µg/ Water bottle

Chemical oxygen demand

Biochemical oxygen

demand

Dissolved oxygen DO

Orthophosphate as P

Nitrate as N

Nitrite as N

Calcium Ca

Cadmium Cd <0.0400 µg/l

<0.0400 µg/l <0.0400 µg/l <0.0400 µg/l Water bottle

Chromium Cr <0.500 µg/l <0.500 µg/l <0.500 µg/l <0.500 µg/l Water bottle

Chloride Cl

Copper Cu 2.450 µg/l 2.080 µg/l <0.200 µg/l 1.21 µg/l Water bottle

Iron Fe

Lead Pb 0.5450 µg/l 0.3890 µg/l 0.082 µg/l 40.8 µg/l Water bottle

Magnesium Mg

Manganese Mn

Mercury Hg <0.010 µg/l <0.010 µg/l <0.010 µg/l <0.010 µg/l Water bottle

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Surface Water Quality (Sheet 2 of 2)

Parameter Results

(mg/l)

Sampling

method

(grab, drift etc.)

Normal

Analytical Range

Analysis method

/ technique

2 Aug 2007

Surface

2 Aug 2007

Near –bottom (89m)

21/22 July 08

Surface

21/22 July 08

Near –bottom (92m)

Nickel Ni 1.100 µg/l 0.370 µg/l 0.350 µg/l 0.320 µg/l Water bottle

Potassium K

Sodium Na

Sulphate SO4

Zinc Zn 59.600 µg/l 5.900 µg/l 11.0 µg/l 8.72 µg/l Water bottle

Total alkalinity (as CaCO3)

Total organic carbon TOC

Total oxidised nitrogen

TON

Nitrite NO2

Nitrate NO3

Faecal coliforms (

/100mls)

Total coliforms ( /100mls)

Phosphate PO4

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Table I.2(i) SURFACE WATER QUALITY

(Sheet 1 of 2) Monitoring Point/ Grid Reference: SW3/ 54º 20.34 '; -11º 03.51 ' (latitude and longitude co-

ordinates are given due to offshore location)

Parameter Results

(mg/l)

Sampling

method2

(grab, drift etc.)

Normal

Analytical

Range2

Analysis method

/ technique

December 2013

Surface

December 2013

Bottom

pH

Temperature oC 11.7 10.5 CTD probe CTD probe

Electrical conductivity EC

Salinity CTD probe CTD probe

Total Ammonia as N <0.01 mg/l 0.01 mg/l Polypropylene

Chemical oxygen demand

Biochemical oxygen

demand

Dissolved oxygen DO

Orthophosphate as P

Nitrate as N

Nitrite as N

Calcium Ca

Cadmium Cd 0.039 µg/l <0.03 µg/l Polypropylene

Chromium Cr <0.5 µg/l <0.5 µg/l Polypropylene

Chloride Cl

Copper Cu 3.15 µg/l 0.28 µg/l Polypropylene

Iron Fe

Lead Pb 6.89 µg/l 0.201 µg/l Polypropylene

Magnesium Mg

Manganese Mn

Mercury Hg <0.01 µg/l <0.01 µg/l Water bottle

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Surface Water Quality (Sheet 2 of 2)

Parameter Results

(mg/l)

Sampling

method

(grab, drift etc.)

Normal

Analytical Range

Analysis method

/ technique

December 2013

Surface

December 2013

Bottom

Nickel Ni 0.585 µg/l <0.3 µg/l Water bottle

Potassium K

Sodium Na

Sulphate SO4

Zinc Zn Water bottle

Total alkalinity (as CaCO3)

Total organic carbon TOC

Total oxidised nitrogen

TON

Nitrite NO2

Nitrate NO3

Faecal coliforms (

/100mls)

Total coliforms ( /100mls)

Phosphate PO4

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

689 1 A14 267 6

0 -- /

/ lm 108

--

3P8 --30'

H 8 0 - PF

0 0

# *

0 -- I

0 0

0 0

ZM 123 S

0 $69

I 147 JP I - PI - I

o n 0 OUTFALL - TREATED SURFACE -- /

U n s u r v e y e d fl 92.- US WATER DISCHARGE LOCATION

C $$$I*. 0 25' 76

W ( s e e S o u r c e D i a g r a m ) 8 w s 8 4 I /

322 ,,, 435 553.1 E 35i l J b ~ /

-- I 6 020 540.3N

/ 69

54" 19.72'N LP

MI 09" 59.46'W ms

Y A

S 210 /

173

/

LD -TREATED PRODUCED tm

WATER DISCHARGE LOCATlOM I83

311 M S 8 4 386171.4 E 6023193.4 N

BE

54" 20.34' N 11" 03.51' W

328 331

I-' ..*

\ WARMING

239 W NOT US€ FOR NAWGATIOH CONSULT ADMIRALTY CHART

249

\ MAP UNDER REGUIAR RN#IK)11

REFER TO AUTHOR FOR LATEST UPDATE

I . ~ & . c * d h n A & ~ k l y ~ a h ( m a ~ W U K ~ p n n * r m U U n - U W ~ m r m r l ~ -bl

- H l m k H D l - ~ l . ~ H ~ k ~ t m e d 188 v a w r n m - ~ ~ n n - ~ a n ~ ~

crm*.dkrnadplw*

z.wmcumnpaormanp-n- rnrcvry

8 . W J i O N b m ~ d ~ ~ h k r r n d l m C m o t D ~ W ~ * l y m W n p - ~ .

WGS84

Legend - Main Pipeline and Umbilical Route

As built location of outfall shown complies with condition 5.4 of IPPC licence (P073841)

MOTE: Onshore pipeline route under revision

Shell Explwation 8 Production in Europe Shell E & P Ireland {SEPIL)

CORRIB BELLANABOY BRIDGE

GAS TERMINAL TREATED WATER

DISCHARGE LOCATIONS

UTM 29U366174E6023193NWGS84 54o 20.34' -11o 03.51'

D (08.04.2014)

UTM 29U435553E6020540NWGS 84 54o 19.72' -09o 59.46'

Outfall - Treated Surface WaterDischarge Location - SW1

Corrib Manifold - Treated ProducedWater Discharge Location - SW3

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Appendix G

Non-Technical Summary

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

NON-TECHNICAL SUMMARY

1.0 Introduction

1.1 General

Shell E&P Ireland Ltd. (SEPIL) is a member of the Royal Dutch Shell Group of

Companies.

The company operates Industrial Emissions Licence Register No. P0738-01

(previously Integrated Pollution Prevention and Control licence P0738-01) from the

EPA to process natural gas extracted from the Corrib Field for export to the Bord Gáis

transmission network from their Gas Terminal facility at Bellanaboy Bridge, Bellagelly

South, Co. Mayo.

SEPIL is applying to the agency for a review of the existing Industrial Emissions

Licence in respect of proposed changes to the activity, the treatment and monitoring

of emissions and the location of discharge points.

The changes to the activity which are described in this review application are as

follows:

Proposed change of discharge point for treated produced water from the

permitted outfall point just outside Broadhaven Bay, to the subsea manifold

located on the sea bed in the Corrib Gas Field in some 350m water depth. This

change followed discussions with the Erris Inshore Fishermans Association (EIFA)

in 2008, during which SEPIL agreed to change the location of the discharge of

treated produced water, subject to statutory approval.

Proposed inclusion of Selective Catalytic Reduction on the power generators to

meet the limits for Oxides of Nitrogen (NOx) specified in the existing Licence.

The locations of a number of sampling and monitoring points have been

reconciled to reflect their planned and as-constructed locations for the facility’s

operational phase. Where groundwater sampling boreholes have been moved

from their original proposed location this is to avoid pipelines or services or to

use suitable existing monitoring points. New locations have been

hydrogeologically assessed and are equivalent to or an improvement on previous

proposed locations.

Surface and groundwater drains are proposed to be monitored and controlled as

separate systems. This has been achieved by changing the Emergency Holding

Tank (EHT) design configuration. The revised design also incorporates

infrastructure as required by licence P0738-01.

It is proposed to amend the emission limit values (ELV) for suspended solids in

stormwater (rainwater) run-off from the site from 5 mg/l to 30 mg/l in

accordance with Best Available Techniques guidance.

Additional noise data from flare/ venting operations is presented.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Modified firewater retention arrangements to comply with Condition 3.17 of

licence P0738-01. This was notified by submission (COR-01-SH-GE-1068) to the

OEE.

Updated location of septic tank and Puraflo modules. These have changed due to

ground conditions.

Proposed removal of ambient monitoring at the Erris Head outfall which is no

longer required as treated produced water discharge will no longer take place at

this location.

Proposed change to monitoring exhaust velocity from turbines from using an air

flow meter to calculation method.

Proposed transitional surface water arrangement during “backfeed gas”

commissioning until outfall pipe is available entailing the discharge of treated

surface water run off form process area to be routed from the treated surface

water treatment (Esmil) plant to local ditch via settlement ponds.

Licence P0738-01 required SEPIL to submit the scope of marine receiving

environmental surveys to the EPA. It also required SEPIL to submit details of

surveys to be carried out prior to commencement. SEPIL wishes to apply for a

change to the licence condition relating to this as part of this review application.

Requirements of the EU Industrial Emissions Directive (2010/75/EU) and the

Environmental Protection Agency (Industrial Emissions) (Licensing) Regulations

2013 S.I. 137 of 2013.

Details of monitoring systems put in place capable of demonstrating integrity and

water tightness on a continuous basis of any cores within the umbilical pipeline

used to convey process effluent.

Seveso classification of the site changed to “Upper tier”

This review also addresses the requirements of the EU Industrial Emissions

Directive (2010/75/EU) and the Environmental Protection Agency (Industrial

Emissions) (Licensing) Regulations 2013 (S.I. No. 137 of 2013).

1.2 Classes of Activity

The applicable classes of activity for the facility (the Terminal) under the First

Schedule of the Environmental Protection Agency Act, as amended, are:

Class 9.3.1 the operation of mineral oil and gas refineries

Class 2.1 Combustion of fuels in installations with a total rated thermal input

of 50MW or more

1.3 EIS and Planning Permission Documents

An Bord Pleanála granted planning permission (with conditions) for the Terminal on

22nd October 2004. Since then there have been a number of planning amendment

applications. Planning permission is in place for all the changes proposed in this

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

application. The EIS prepared for the terminal planning application and subsequent

addenda and updates, the planning permission for the Terminal and subsequent

planning permission, amending the original permission, are submitted as part of this

application the application.

1.4 BAT Guidance

The processes used at the Terminal utilise ‘best available techniques’ (BAT) and will

be operated using ‘best available practice’. In particular, the technologies and

systems used to minimise and control emissions are considered BAT.

The following BAT guidance documents are relevant to the activity:

EPA Office of Environmental Enforcement (OEE) Guidance Note for Noise: Licence

Applications, Surveys and Assessments in Relation to Scheduled Activities (NG4).

EPA BAT Guidance Note on Best Available Techniques for the Oil and Gas Refining

Sector 2008.

EPA BAT Guidance Note on Best Available Techniques for the Energy Sector

(Large Combustion Plant Sector) 2008.

The following BREF documents are relevant to the activity:

Integrated Pollution Prevention and Control (IPPC) Reference Document on Best

Available Techniques for Mineral Oil and Gas Refineries February 2003.

Integrated Pollution Prevention and Control Reference Document on Best

Available Techniques for Large Combustion Plants July 2006.

Integrated Pollution Prevention and Control (IPPC) - Reference Document on Best

Available Techniques in Common Waste Water and Waste Gas

Treatment/Management Systems in the Chemical Sector – February 2003.

Integrated Pollution Prevention and Control (IPPC) Reference Document on the

General Principles of Monitoring July 2003.

Reference Document on Best Available Techniques for Energy Efficiency February

2009.

Integrated Pollution Prevention and Control Reference Document on Best

Available Techniques on Emissions from Storage July 2006.

No relevant BAT conclusions have been published.

1.6 Determination of Emission Limit Values

The emission limits for emissions to air from the gas turbines were determined by the

Large Combustion Plant Regulations, 2012.

The emission limits for emissions to air from the power generators (spark ignition

engines) were determined by Annex 5 of the Gothenburg Protocol and the BRef for

Large Combustion Plants.

The emission limits for emissions to surface water were determined by the EPA BAT

Guidance Note on Best Available Techniques for the Oil and Gas Refining and by the

previous licence.

The emission limits for noise emissions was determined by the EPA Guidance Note for

Noise: Licence Applications, Surveys and Assessments in Relation to Scheduled

Activities (NG4).

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

1.7 European Communities (Control of major Accident Hazards Involving Dangerous

Substances) Regulations, 2006

The Terminal constitutes an establishment to which the European Communities (Control

of major Accident Hazards Involving Dangerous Substances) Regulations, 2006 (S.I.

No. 74 of 2006) applies. The product and raw methanol inventory exceeds the Lower

Tier threshold requirements for Articles 6 and 7 of the SEVESO II Directive, as such

classifying it as Upper Tier.

1.8 Derogation

No derogation is being sought.

2.0 Terminal Operations

2.1 General

The onshore Bellanaboy Bridge Gas Terminal will extract natural gas from the Corrib

Field for processing and treatment to Bord Gáis specifications prior to exporting to

the distribution network. The Terminal is designed to produce up to 9.9 million

standard cubic metres of natural gas per day from the Corrib Field. The Corrib Field

is a gas field located below the seabed in the Atlantic Ocean ca. 65km off the Mayo

coastline and at ca. 350 metres water depth.

The Terminal monitors and controls the operation of the entire Corrib Field facilities

(onshore Terminal, onshore pipeline) and offshore sub-sea facilities) such that gas

production meets demand and to ensure that operations are conducted in a safe and

environmentally sound manner. The Terminal is a 24-hour manned operation, 365

days per year, utilising a five shift system. At steady state operation, the total

number of personnel associated with the Gas Terminal will range from approximately

100 to120 personnel.

The primary functions of the Terminal will be to:

Monitor and control the operation of the entire Corrib Field facilities (onshore and

offshore) such that gas production meets demand and to ensure that operations

are conducted in a safe and environmentally sound manner.

Remove liquids from the Corrib gas stream so that it meets the Bord Gáis

network transmission specification.

Compress, meter and odourise the gas prior to export to the Bord Gáis

transmission network.

Recover the hydrocarbon condensate from the gas stream and export it off-site.

Inject methanol and corrosion inhibitor for use in the sub-sea facilities and

recover methanol for re-use.

Treat water removed from the natural gas stream and discharge the treated

water to sea.

2.2 Process Unit Operations, Utility and Treatment Systems and Safety Systems

The principal process unit operations at the Terminal and the utilities / ancillary

equipment including safety systems which will support these operations are outlined

in the following sections.

2.2.1 Process Unit Operations

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Inlet and Reception Facilities

The Inlet and Reception Facilities will receive the fluids from the Corrib Field and

remove entrained water and liquid hydrocarbons. The fluids from the Corrib Field

that are received at the Terminal will be mainly gas, but some liquid will also be

present. The liquids consist primarily of:

Aqueous Phase:

o Water of Condensation (present in the gaseous form within the Corrib Field

which condenses out from the gas as its temperature and pressure fall) and

Formation Water (present in the liquid form within the reservoir). Formation

Water, if it occurs, is only expected later in the field life. Water of

Condensation and Formation Water are referred to as Produced Water.

o Methanol (injected from the Terminal to prevent freezing in the sub-sea

equipment and pipeline).

o Corrosion inhibitor injected into the sub-sea system to prevent corrosion.

Liquid Hydrocarbon Phase:

o Condensate (hydrocarbons that exist in vapour phase in the gas reservoir

and condense from the gas as the temperature and pressure fall).

The production fluids will arrive at the Terminal generally as a very fine mist but with

intermittent “slugs” of liquids also arriving at the Terminal. The liquids in the pipeline

will tend to run back along the pipe particularly at times of low gas flow and will

collect at low-points, or dips, in the pipeline. As liquids build up at these low points,

it will be picked up by the fast-flowing gas and will arrive in varying quantities or

‘slugs’. If required, the build-up of liquids in the pipeline can be cleared by running a

sphere (known as a pig) through the pipeline.

On entry to the Terminal, the incoming fluids are passed through a slugcatcher. This

is an arrangement of large pipes in which the incoming production stream is calmed

by substantially reducing its velocity and the two liquid phases are separated from

the gas by gravity. The condensate and water/methanol that separate out from the

gas stream pass to the condensate and methanol recovery systems respectively. The

gas stream flows to the Inlet Separator which separates finer drops of liquid from the

gas stream before it passes to the gas conditioning stage.

Gas Conditioning

The Corrib Field gas can be considered a very pure gas and therefore the

conditioning required to meet export gas specification is very simple. The gas

conditioning process will firstly remove any trace mercury (if present) which will be

absorbed onto the removal bed and converted into a stable chemical compound. The

gas conditioning process will then dry the gas stream (by lowering the dew-point)

and remove any residual liquids. This is achieved by feeding the gas to a pressure-

letdown valve where it is allowed to expand. This has the effect of cooling the gas

and condensing out any remaining traces of condensate, methanol and water.

Gas Compression and Export

Before the conditioned gas stream can be exported to the transmission network it

will be compressed to the required export pressure by compressors which are

powered by gas turbines. The gas will then be metered and an odourant will be

added prior to export to the transmission network.

Condensate Recovery and Stabilisation

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Hydrocarbon condensate is as a byproduct of the gas treatment process. The

condensate recovered in the inlet and reception facilities, and conditioning stage will

be stabilised by a series of pressure reductions and heating. It is then cooled and

any trace mercury (if present) in the condensate stream will be removed by a

mercury removal bed and converted into a stable chemical compound in the process.

The condensate is then transferred to storage tanks prior to being exported off-site.

It is anticipated that the exported condensate will be used as a fuel and

consequently. Any gas flashed from the process will be used in the Low Pressure (LP)

Fuel Gas system.

Methanol Recovery, Regeneration and Chemical Injection

Methanol essentially acts as an antifreeze agent and is used to prevent freezing

(hydrate formation) within the off-shore and on-shore facilities. Methanol that is

injected to the offshore facilities (via the umbilical cable) is recovered from the

production fluids entering the Terminal and regenerated for re-use. The methanol

recovered from the gas has a high water content and it is separated from the water

by distillation in the methanol still. Corrosion inhibitor will be injected into the

methanol system for transfer to the off-shore facilities to prevent corrosion in the

off-shore facilities.

2.2.2 Utilities and Treatment Systems

Fuel Gas System

Natural gas that is used as a fuel in the Terminal is referred to as Fuel Gas. The Fuel

Gas system will use some of the natural gas extracted from the Corrib Field as a fuel

supply for the Terminal operations. High Pressure (HP) fuel gas will be used as a fuel

in the sales gas compressor turbines. Low Pressure (LP) fuel gas will be used as a

fuel in the power generators.

Waste Heat Recovery and Heating Medium System

An aqueous solution of 40%wt Triethylene Glycol (TEG)/Water mixture is used as a

heating medium to provide heating to various Terminal process operations. The use

of a 40%wt TEG solution avoids potential freezing at minimum ambient temperature.

The heating medium is circulated through Waste Heat Recovery Units that are

attached to the exhaust ducts of the gas turbines. These units heat the heating

medium fluid. The requirement for waste heat recovery is a condition in the existing

Industrial Emissions licence (Condition 3.7). The heating medium fluid will then be

transferred to the process users (Inlet Heater, Cold Condensate Heater, Condensate

Heater, Methanol Reboiler).

Utility Gases

A nitrogen generation package will supply nitrogen to be used in blanketing / purging

of tanks, process vessels and pipework for safety purposes. The use of nitrogen

ensures an inert atmosphere (absence of oxygen) and prevents the occurrence of

potentially flammable / explosive atmospheres.

The Instrument Air Package will supply clean, dry, compressed air for

instrumentation and plant use (as required).

Potable and Service Water Systems

The local authority water supply (sourced from Carrowmore Lake) will undergo

treatment at the Terminal prior to use as a supply of potable water. The local

authority supply will also be used if necessary, for manual make-up of firewater in

the firewater pond.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Power Generation

The Terminal will be self-sufficient in power generation. Three gas compression

engines (2 Duty/1 Standby) fuelled by low pressure fuel gas will generate power for

the Terminal. A diesel driven emergency generator will be used to provide

emergency power to critical users on loss of the normal power supply. Depending on

Operational and Commercial requirements, a small percentage of overall load will be

taken from the grid supply. The primary use of the grid supply is to provide a backup

power supply to the firewater transfer sumps.

Treatment of Produced Water

Produced water will be treated as described in the previous application and will be

discharged in line with the emission limit values set out in the existing licence.

As part of the recovery of natural gas from the reservoir, some fluids will also arise

in the form of water of condensation and formation water, which comes from the

rock reservoir in which the gas occurs. The condensed water often contains traces of

organic compounds and some metals. The formation water, should it occur will

contain natural salts and minerals which have leached from the rock in which the

water has been resident over geological time. The actual composition will vary from

location to location (well to well) and over time. Indications of the likely constituents

have been determined from industry experience and from the testing of the water

recovered from the exploration wells.

The water that is removed from the natural gas stream (referred to as produced

water) will be treated prior to discharge to sea. The majority of treated produced

water will be discharged through spare cores in the umbilical to the subsea manifold

located at the Corrib gas field some 65km offshore (~ 92km along the pipeline

length from the terminal) and in 350m depth of water. Any surplus treated produced

will be removed offsite by a licensed waste management contractor. To control

biological growth in the umbilical cores a small amount of biocide will be added to

the treated produced water prior to being discharged into the umbilical cores. The

biocide will be added for a period of 2 hours per day.

Annual usage of biocide will be less than 0.395m3. On discharge, produced water will

be rapidly diluted and dispersed and the chosen biocide will rapidly biodegrade and

undergo additional degradation via hydrolysis. Consequently the environmental

impact will be negligible.

The produced water treatment plant is a multi-stage treatment system, which

includes:

Corrugated Plate Interceptor,

Ultrafiltration,

Nano Filtration,

Granular Activated Carbon Bed,

Ion-Exchange Units,

pH adjustment.

Treatment of Surface Water Runoff (from process areas)

Rainwater falling on process areas included bunded areas on site will be collected in

the potentially contaminated drain system on site (oily water system). The water will

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

be treated in the surface water treatment plant and will be discharged via the

permitted outfall located ca. 12.7 km offshore from the landfall location.

The surface water treatment plant is also a multi stage treatment system, which

includes:

Corrugated Plate Interceptor,

Multimedia Filter,

Ultrafiltration unit.

Both treatment systems will share common sludge treatment facilities (Precipitation,

Coagulation, Flocculation, Filter Press equipment).

Uncontaminated surface water and ground water

Rainwater that falls on non-process areas on site will be collected in the perimeter

surface water drain system. The water will be directed through the emergency

holding tank (EHT) where it is continuously monitored for Total Organic Carbon/Total

Carbon as a precautionary measure.

In the event of a confirmed fire or if contamination is detected, the isolation valve in

the EHT will automatically close thus preventing surface water from leaving the site.

Water can be returned to the open drain sump for treatment and disposal via the

permitted outfall.

2.2.3 Safety Systems

Flaring

Flare systems are provided at the Terminal for depressurisation of the plant for

maintenance purposes and during emergency situations. The ground Maintenance

Flare System will primarily be used to safely depressurise sections of the Terminal’s

gas systems for maintenance. During emergency situations, gas from high pressure

(HP) and low pressure (LP) sections of the plant can be flared through the HP and LP

flares respectively.

Firewater

The firewater system provides water for fire-fighting purposes and supplies water to

hydrants, monitors, deluge systems, foam systems and hose reels at the Terminal.

Firewater is stored in the Firewater Pond. The Used Firewater Pond will collect

potentially contaminated firewater in the event of a fire.

Nitrogen Blanketing

Nitrogen will be used in blanketing and purging of tanks, process vessels and

pipework for safety purposes.

Laboratory

There will be an on-site laboratory located within the main Terminal buildings

complex. The laboratory will be used for product quality and environmental testing

purposes and to assist with process troubleshooting if required. The laboratory will

contain required equipment to carry out these tests.

2.3 Fuel and Energy Consumption

There will be two principal users of gas fuel at the Terminal:

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Power Generators (2 Duty/1 Standby) firing on Natural Gas (Fuel Gas)

Sales Gas Compressor Turbines (Duty/Standby) firing on Natural Gas (Fuel Gas)

An emergency generator running on diesel will be used during emergencies or black-

starts. The terminal is connected to the ESB electrical grid. The original design of the

plant included a fired heater for heating the Plant Heating Medium. The Fired Heater

was designed to burn gas as the primary fuel as well as excess condensate not

exported off-site. This has been removed from the design and replaced with waste

heat recovery on the compressor gas turbines, with a consequent reduction in

CO2 emissions and improvement in overall plant energy efficiency.

2.4 Alternatives Considered

The following alternatives have been considered since granting of Licence Register

No. P0783-01:

Onshore Pipeline Routing: The onshore pipeline development was subject to a

review which commenced in 2007 and included the consideration of:

o alternative landfall points, pipeline routes, construction methods, and

o alternative options for the design and configuration of the Landfall Valve

Installation (LVI).

The review resulted in the selection of a new pipeline route between the

permitted landfall point and the terminal, as well as an update to the design of

the landfall valve.

Selection of Selective Catalytic Reduction to reduce NOx emissions: Following the

grant of Licence Register No. P0783-01 the conditions required that power

generation engine exhausts would be required to meet the 250mg/

Nm3 NOX Emission Limit Value (ELV). Alternative options to reduce the NOx level

in the exhaust gas were considered.

Five alternative options (set out in the table below) were identified and screened

for practicability, cost, impact and viability.

Alternative Options

Considered Description

1. Selective Catalytic

Reduction (SCR)

Retain the purchased gas engines and install an SCR

exhaust treatment package to reduce emitted NOx

below the ELV.

2. Convert Gas Engines with

connection to Electricity Grid

and use of an emergency

diesel generator

Convert the purchased gas engines to run at fixed

speed to achieve NOx emission level of 250 mg/Nm3

NOx with connection to the electricity grid to handle

plant load variations and procure an emergency

diesel generator-set to meet lower onsite power

requirement during grid outages.

3. Convert existing gas

engines with connection to

the Electricity Grid, during

outages only using

generators

Convert the purchased gas engines to run at fixed

speed to achieve NOx emission level of 250 mg/Nm3

NOx with connection to the grid to handle plant load

variations. Existing gas engines would be run during

grid outages.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

4. Connection to electricity

grid

Replace purchased gas engine generator sets with a

dual-redundant grid connection.

5. Procure other available

power generation

technology

Use alternative power generation arrangements, such

as gas turbines, Combined Heat and Power (CHP) or

renewable energy.

Of those alternatives considered as technically feasible and economically viable,

SCR was identified as the preferred option, as it is a proven method of reducing

NOx emissions and has been implemented on numerous gas engine applications

in the United States.

A design study confirmed the practicality of retro-fitting SCR systems to the gas

engine power generation units and achieve the required NOx emission reduction

levels with minimum changes to the terminal plant.

3.0 Raw Materials and Product

Natural gas will be the only ‘product’ of the Terminal. The Terminal will be designed

to produce 350 million standard cubic feet of (9.9 million cubic metres) of natural

gas per day from the Corrib field for export to the Bord Gáis distribution network. All

other materials at the Terminal will be either materials utilised in the operation of the

Terminal or by-products from the treatment of the natural gas.

The Corrib field contains a dry sweet (no hydrogen sulphide) gas with an expected

condensate yield of less than 0.5 barrels per million standard cubic feet (0.08 cubic

metres per 28,317 cubic metres).

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

4.0 Emissions to Atmosphere

4.1 Emission Sources

The main emissions to atmosphere from the facility will be generated by two gas

turbines and three power generators as described below.

The two gas turbines are fitted with low NOx (Oxides of Nitrogen) emission

technology, to ensure compliance with the Emission Limit Values (ELVs) specified in

the existing Industrial Emissions Licence (P0738- 01).

The three power generators at the Terminal will be fuel gas fired compression

engines, which will be high efficiency ‘clean burn’ engines. Selective Catalytic

Reduction (SCR) will be used to minimise emissions of NOx to ensure the exhaust gas

complies with the Emission Limit Values (ELVs) specified in the existing IPPC licence

(P0738-01).

The Emergency Generator and Firewater Pump Engines will only be used for

emergency situations and testing regimes. This equipment will be fired on low

sulphur diesel, which will minimise emissions of SO2.

In emergency situations, to allow depressurisation of equipment for safety reasons,

it may be necessary to flare gas from the gas terminal using the high pressure (HP)

and low pressure (LP) flares. The HP/LP flares will also be used for testing during the

commissioning phase and thereafter only used in emergency situations.

Flaring results in the release of NOx and CO from natural gas combustion and also

unburnt hydrocarbons depending on the destruction efficiency of the flare. Emissions

to air of NOx and CO during flaring activity have been assessed in the dispersion

modelling study. Releases of unburnt hydrocarbons are negligibly low in quantity.

As part of normal operation, very occasionally, it will be necessary to cold vent gas

from certain high pressure and low pressure sections of the plant through the high

pressure (HP) and low pressure (LP) flare stacks respectively. The potential impacts

on air quality due to cold venting have also been assessed.

4.2 Fugitive Emissions

Fugitive emission sources are limited to minor leakages from connections, isolation

and control valves, relief valves, rotating equipment seals and analysers. This type of

emission is small but unavoidable in this type of installation. The Terminal has been

designed to minimise the number of potential sources of fugitive emissions by

minimising the numbers of components from which minor leakages could occur. The

use of low-leak equipment (valves, pumps, etc.) in the Terminal will further reduce

the potential for fugitive emissions as will good housekeeping practices, including

preventative maintenance and routine monitoring of equipment on site. Nitrogen

helium leak testing will be carried out prior to the introduction of hydrocarbons; this

will ensure fugitive emissions are kept to an absolute minimum level for all flanges

and shaft seals.

4.3 Assessment of Impact of Atmospheric Emissions

Operations at the Terminal will not result in a significant impact on local air quality.

This conclusion is based on a comparison of the ground level pollutant concentrations

predicted by highly conservative dispersion modelling with relevant air quality

standards and guidelines.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

The modelling predicts no relevant ambient air quality standard or guideline will be

exceeded or approached at any location beyond the site boundary when all installed

plant is operating at full output (a worst case scenario). Existing air quality is very

good and is predicted to remain so with the gas terminal in operation.

Emissions of the main polluting substances (as defined in the Schedule of EPA

(Industrial Emissions) (Licensing) Regulations 2013, (S.I. No. 137 of 2013)) to the

atmosphere are highly unlikely to impair the environment.

5.0 Emissions to Waters

5.1 General

There will be three discharge points to surface waters from the terminal as described

below:

Treated Surface water runoff from process areas which will be discharged at the

outfall outside Broadhaven Bay – SW1

Uncontaminated surface water runoff which will be discharged to the R314 Road

Drainage Ditch to south-west of Terminal – SW2

Treated Produced water which will be discharged at the subsea manifold via the

umbilical cores – SW3

The different sources of water and their associated drainage systems at the Terminal

have been segregated to minimise the unnecessary treatment of less contaminated /

uncontaminated systems. Treatment systems in place for produced water and

surface water runoff (from rainfall falling on process areas on site where there is

potential for the water to become contaminated ) comprise multi stage treatment

prior to discharge to sea to ensure compliance with the emission limit values set out

in Licence Register No. P0738-01. The produced water and surface water systems

will be treated in separate systems before being discharged at separate locations.

Treated produced water will be discharged to emission point SW3, while treated

surface water runoff will be discharged to emission point SW1, when this emission

point is available. Construction of the Corrib onshore pipeline and associated water

outfall pipeline to emission point SW1 is underway with construction estimated to be

completed by late 2014. Treated surface water will be discharged through emission

point SW2 from the storm water settlement ponds for the interim period as described

below. Multi stage treatment will be completed prior to discharge.

In advance of the completion of the outfall pipe to emission point SW1, it is proposed

to commission and test some sections of the plant, using gas from the Bord Gáis gas

grid. This transitional arrangement is referred to as “back-feed gas”. During back-

feed gas, treated surface water run-off from process areas, which will be discharged

to SW1 when the terminally will be fully operations, will be discharged to SW2. The

discharge will be monitored and will comply with the emission limits values for SW2.

Once discharge point SW1 becomes available, the treated surface water run-off from

process areas will be discharged through it.

Uncontaminated Surface Water (or “storm water”) comprises runoff from the

Terminal’s non-process areas and roofs. This Storm water is considered clean and is

collected in the perimeter surface water drains. These drains are routed via an

Emergency Holding Tank (EHT) to the settlement ponds prior to discharge a minor

water course in the vicinity of the Terminal at emission point SW2, which feeds into

the Bellanaboy River and ultimately Carrowmore Lake

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Storm water is monitored in the EHT as a precautionary measure. In the unlikely

event of contamination being detected the isolation valve will close preventing storm

water from leaving the site.

Groundwater is collected beneath the site to prevent the groundwater level rising

within the fill and to ensure a stable platform for the terminal. Groundwater is

directed to the perimeter groundwater drains and converges in groundwater manhole

26 (MH26)in the south west corner of the site. As a precautionary measure

groundwater is continuously monitored for TC/TOC (Total Carbon / Total Organic

Carbon).

In the unlikely event of contamination detected in the groundwater system at MH26

or in the surface water drains at the EHT, either system can be independently

isolated from discharging into the settlement ponds. Retained water from either

system can be pumped back to the Open Drain Sump for subsequent onsite

treatment. Maintaining the systems segregation of groundwater and surface water in

this way has the benefit of minimizing the quantity of water that would be required

to be managed and treated in the event of confirmed contamination.

Groundwater and surface water converge in manhole 27 and the combined flow is

conveyed to the settlement ponds.

The settlement ponds are as described in the previous application. The settlement

ponds will retain the oil retention barrier previously referred to as an oil skimmer as

an additional precautionary measure. The drainage system, including the settlement

ponds, has been very conservatively designed and will provide buffering storage

capacity during high rainfall events and will assist in retarding flow velocity, diffusing

the water discharge intensity and preventing scouring / erosion of the existing

watercourse. The water is sampled and monitored in accordance with the conditions

in the existing licence and discharged to the road drainage ditch, which feeds in to

the Bellanaboy River and ultimately Carrowmore Lake.

It is estimated that the total sediment run-off from the terminal footprint will

increase the concentration of sediment in Carrowmore Lake by 0.296mg/l. This value

is approximately 1% of the Salmonid Regulations limit for suspended solids. As the

suspended solids concentration in the lake is well below 25mg/l, an increase of this

magnitude is not significant.

5.2 Assessment of Impact of Emission to Waters

Treated Produced Water (SW3)

Due to the small volume and level of treatment of produced water, plus the dilution

and dispersion available at the discharge point and taking into account the rapid

biodegradation characteristics of the chosen biocide it is predicted that no observable

environmental impacts will occur due to the discharge in the Corrib Field at emission

point SW3.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Treated Surface Water from Process Areas (SW1)

Previous dispersion modelling in support of the IPPC application in December 2004

assessed the impact of the combined treated produced water and surface water at

emission point SW1, the outfall outside Broadhaven Bay. These studies showed that

given the level of treatment the discharge would have a negligible impact on water

quality.

As produced water will now not be discharged via this outfall, the determination that

there would be negligible impact in this area is still valid. Moreover the potential for

impact would be reduced.

With respect to the discharge of uncontaminated surface and groundwater water

from the Terminal to a local watercourse in the vicinity of the Terminal (SW2), no

significant impact is anticipated. Biological monitoring undertaken Bellanaboy River

upstream and downstream of the site during earthworks construction stage at the

site indicated no impact to the surface water limit adopted. Therefore adopting a

similar limit for the operational phase suggests that water will be maintained in a

good status. No impact is anticipated to the Bellanaboy River or Carrowmore Lake.

6.0 Emissions to Ground

There is one emission point to ground at SL1 from the Terminal.

Domestic sewage consisting of wastewater from staff facilities (Toilets, Showers,

Canteen etc.) will be treated in a septic tank and Bord na Móna Puraflo system

before being discharged to a 300 m2 percolation area on site. The Puraflo system will

treat the effluent to a very high standard prior to discharge to the percolation area

where further polishing of the effluent can be expected to occur. The location of the

Puraflo system has been amended and was subject to a planning amendment

application.

Various containment measures (including bunding and kerbed areas) have been

incorporated into the design of the Terminal to contain any accidental releases and

so prevent impact on ground or groundwater quality.

The baseline report, prepared for the application, concludes that on the basis of the

site investigations undertaken it appears that the site is underlain by a layer of peat

overlying mineral soils (head and till) which in turn overlies weathered rock and

bedrock comprising dark grey metamorphic schist belonging to the Inverschist

formation. An aquifer vulnerability assessment of the site rated the aquifer beneath

the site as being a Poor Generally Unproductive Aquifer (Pu) based on Geological

Survey of Ireland (GSI) guidelines. Based on the thickness and type of overburden

cover, the aquifer vulnerability for the majority of the site (including the percolation

area and Terminal footprint) is considered moderate (M) using GSI Guidelines for

aquifer protection.

Taking into account the relatively small volume and the high standard of treated

effluent from the Puraflo system and that the fact that the underlying aquifer is

considered a Poor Aquifer with moderate vulnerability (majority of site), the

discharge of the treated effluent to the percolation area is not predicted to have any

significant adverse impact on the underlying soils, bedrock or hydrogeology at the

Terminal site.

7.0 Noise Emissions

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

Noise emissions will comply with the limits set out in Industrial Emissions Licence

P0738-02.

The Terminal has been designed and built to comply with standards equal to the

more onerous standards required for an ‘Area of Low Background Noise’, as specified

in the EPA Guidance NG4. The minimisation of noise has been an integral part of the

Terminal design and noise level criteria have been specified for all equipment to

ensure that operation of the Terminal has minimal impact on any noise sensitive

receptors (e.g. residential dwellings) in the vicinity of the Terminal.

In addition to this the Terminal has been designed so there will be no tonal or

impulsive noise audible at noise sensitive locations.

There will be various noise generating equipment associated with the normal

operation of the Terminal. There will also be noise generating equipment which,

other than for testing purposes, will only be used in emergency situations (e.g.

emergency generator).

Environmental noise surveys have been carried out at the closest Noise Sensitive

Locations (NSLs) to the Terminal site in 2013, 2008, 2003, 2001 and 2000. Analysis

of this data demonstrates that weather strongly influences the soundscape of the

area. The modelling has shown that the noise contribution from the Terminal will not

exceed licensed limits.

A schedule of plant items with the potential to generate significant noise levels was

used as the basis for the Terminal noise emissions modelling presented in the 2003

Terminal EIS. This schedule has been maintained and updated with engineering

developments over the intervening period and reviewed. Noise modelling has been

updated to take into account site measurement data for the fire water pump house

and associated systems, and some of the more significant cooling fan systems which

could be run during full plant commissioning. A very detailed study of noise

emissions from process valves and pipework was also undertaken which resulted in a

programme of additional noise control lagging works to achieve demonstrable

compliance with noise limits.

A review was undertaken of noise emissions arising from all conceivable maintenance

and upset scenarios in which hydrocarbon inventory would need to be discharged

from the Terminal either by cold venting or flaring. The operation of the HP and LP

flares would cause the normal operational noise limits to be exceeded; however the

only times the HP/LP flares will operate will be for testing and thereafter only in

emergency situations. Therefore following commissioning the HP/LP flares will only

be used rarely.

Cold vented releases from compressor changeovers will be vented (not ignited)

through the HP flare, which is not anticipated to cause any noise disturbance and will

comply with the noise limits set out in the existing licence.

In summary the noise generated during normal operation of the Terminal is not

predicted to have any significant impact on ambient noise levels or noise sensitive

receptors in the vicinity of the Terminal.

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:53

8.0 Waste

The Terminal will not generate significant quantities of waste. Minimisation of waste

was one of the criteria considered during the selection and design of

equipment/processes at the Terminal. No wastes will be accepted at the Terminal.

All waste generated on site, both hazardous and non-hazardous, will be handled,

stored, transported off-site and treated / disposed of in accordance with statutory

requirements and in a manner that will eliminate or minimise any risk to persons

and/or the environment. A dedicated waste storage area will be used to store waste

prior to its removal off-site.

The additional waste stream in this application comprises surplus treated produced

water and condensate which will be disposed of off-site using tankers.

A Waste Management Programme will be implemented during the operation of the

Terminal to ensure the proper management of waste on site which will focus on

reduction, recovery and recycling of wastes where feasible. The Programme will form

a key part of the formal Environmental Management System to be implemented on

the site.

9.0 Sampling and Monitoring

Shell E&P Ireland Ltd. (SEPIL) will comply with the emissions monitoring regime

specified by the Environmental Protection Agency as part of the Industrial Emissions

Licence.

Provision for monitoring, sampling and analyses of environmental emissions, has

been incorporated into the design of the Terminal. The Terminal will employ the

appropriate technology and control systems to ensure that all processes continue to

perform to specification and that any process upsets (e.g. environmental control

systems) are quickly detected and rectified. SEPIL propose a programme of

monitoring and sampling to ensure operations do not have any significant impact on

the environment.

The location of sampling and monitoring points has been updated in this review

application to reflect their planned and as-constructed locations for the facility’s

operational phase.

Monitoring has been provided for emissions to atmosphere, emissions to surface

waters and emissions to ground. In addition to this ambient monitoring will be

carried out on air quality, surface water quality, groundwater quality and a

continuous noise meter will be installed on the site in order to monitor noise levels

prevailing in the vicinity of the terminal.

Ambient monitoring of marine waters in the vicinity of SW1, outside Broadhaven

Bay, is no longer proposed as only treated rainwater falling on process areas on site

will be discharged at this location. The water will go through a very comprehensive

treatment process and will be discharged in line with the emission limit values set

out in the existing licence. Given the volume and level of treatment of discharge no

impact is anticipated.

Similarly ambient monitoring in the vicinity of the subsea manifold, in the vicinity of

SW3, is not proposed. Given the very small volume and high level of treatment of

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:54

water discharged no observable environmental impact is anticipated from the

discharge.

As there are no predicted impacts in the vicinity of the facility it is not envisaged that

there will be any transboundary impacts and therefore no additional monitoring is

required.

10.0 Energy Efficiency

The Terminal will be self-sufficient in power generation with three power generators

(2 Duty / 1 Standby) each capable of supplying half the maximum power demand of

the Terminal. This system comprising individual power generation units and gas

turbines combined with waste heat recovery was chosen over alternative systems

because of the specific requirements of the Terminal and because it will require a

lower total thermal input and thus result in lower emissions to atmosphere.

The original design of the plant included a heater for the Plant Heating Medium,

which would use fuel gas as the primary fuel and hydrocarbon condensate when

available. A decision was made not to use condensate as fuel in the Terminal and

this led to a comprehensive review of the energy efficiency of the plant. The result of

this review was a decision to install Waste Heat Recovery (WHR) on the gas

compressor turbines. It is estimated that the WHR units installed in the exhausts of

the gas turbines will recover up to 5.5MW of heat energy, which is sufficient to meet

the design heat demand of the terminal.

It is estimated that WHR will save the combustion of approximately 0.65 MMscf

(million standard cubic feet) per day of fuel gas in the heating medium heater and

reduce CO2 emissions from the site by approximately 10,000 tonnes per year. Heat

integration solutions with a contribution up to 8 MW have already been included in

the current Corrib plant design to decrease process heat requirements.

The primary fuel used at the Terminal will be natural gas, which is a very clean fuel

and high efficiency combustion equipment will be employed at the Terminal. A load

management scheme will manage the operation of the three power generators and

will be designed to match load and demand thereby optimising energy supply.

Regular servicing and maintenance of equipment will ensure that all equipment

continues to perform to specification. Insulation has been incorporated into building

structures and equipment at the Terminal to minimise heat losses. An Energy

Management System including energy auditing and consumption reporting will form

part of the Environmental Management System (EMS) to be implemented at the

Terminal to ensure the ongoing efficient use of energy. Energy use and efficiency

within the Terminal will be benchmarked against similar installations and this will be

used as a driver for continual improvement.

11.0 Containment of Accidental Emissions

All surface water runoff from process areas and bunded areas of the Terminal which

could potentially be contaminated, will drain to the Open Drains Sump and will be

treated in the Surface Water Treatment System prior to discharge.

Bulk chemical and fuel storage tanks at the Terminal will be bunded to contain at

least 110% of the volume of the largest single tank or 25% of the volume of the

total tankage within the bund (whichever is greater). Valving exterior to the bund

wall(s) will isolate the bund contents to contain any spillages and to control the

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:54

discharge from the bund(s) to the Open Drains Sump. Rainfall accumulation

procedures will be adopted to ensure the capacity of bunded areas are not reduced.

Dosing, injection and cleaning chemicals will be stored in small quantities and any

spillage will be contained locally in bunding or drip trays for re-use or disposal. Any

other potential sources of spillage (e.g. pumps, sample points, level gauges, etc.)

will be provided with local shelter and collection trays, sumps or interceptors as

appropriate.

A Major Accident Prevention Policy (MAPP) will be prepared for the site and

implemented by the Safety Management System at the Terminal. The MAPP will

include for the identification, evaluation and prevention of major accident hazards

and for emergency planning and emergency response to minimise the consequences

of any accidents on human health and the environment

12.0 Cessation of the Activity

The life of the Corrib Gas Field has been predicted by reservoir simulation and

modelling to be between 15 and 20 years. The Bellanaboy Bridge Gas Terminal has

a minimum (design) life of 30 years. Decommissioning of the Terminal is expected

to take place after 2032. The timing of decommissioning will be determined by the

volume of gas produced each year from the Corrib Field, which is primarily a function

of the volume of gas contained within the Corrib Field and how effectively and rapidly

the gas contained within the reservoir can be recovered.

The Petroleum Lease for the Corrib Field contains stringent provisions to ensure that

the Corrib Field facilities, including the Bellanaboy Bridge Gas Terminal, are

decommissioned in a timely and appropriate manner. A Decommissioning Plan will

be prepared to comply with this requirement.

SEPIL will ensure that appropriate measures are taken to avoid any pollution risk and

return the site to a satisfactory state.

13.0 Measures to Comply with Environmental Quality Standards

As described above, the terminal facilities, equipment, abatement systems and

operating procedures have been designed to comply with the relevant Environmental

Quality Standards. The monitoring, described above, will be undertaken to ensure

that compliance is achieved.

14.0 Measures to Comply with Council directives 80/68/EEC and

2006/118/EC in Relation to the Protection of Groundwater

As described above, the Terminal facilities, equipment, abatement systems and

operating procedures have been designed to ensure the protection of groundwater.

The monitoring, described above, will be undertaken to ensure that groundwater has

been protected.

15.0 Measures to Minimise Pollution over Long Distances or Outside of

Ireland

As described above, the Terminal facilities, equipment, abatement systems and

operating procedures have been designed to minimise pollution in the vicinity of the

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:54

Terminal and outfalls. These facilities, systems and equipment will also serve to

minimise long distance pollution and pollution outside Ireland. No such pollution is

expected to occur.

13.0 Site Management and Control

SEPIL aligns its HSE policy with that of the corporate company.

An Environmental Management System (EMS) certified to the international standard

ISO:14001 will be implemented at the Terminal. This will provide a formal structure

for environmental management, ongoing assessment of environmental performance

and continual improvement at the Terminal. As part of the Health, Safety and

Environmental (HSE) Plan an EMS will be prepared which will detail the EMS targets

for the Terminal and how they will be achieved. Staff will be issued with a copy of

the plan, will familiarise themselves with the plan and will participate in

implementing the plan. To ensure commitment to meeting the targets in the plan,

EMS performance will form part of each person’s annual appraisal, with good

performance being rewarded accordingly.

The EMS will align with the corporate Shell requirements for HSE Management

Systems and specific procedures therein relating to environmental management

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:54

Appendix H

Table E.1 (ii) Main Emissions to

Atmosphere

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:54

TABLE E.1(ii) MAIN EMISSIONS TO ATMOSPHERE (1 Page for each emission point)

Emission Point Ref. No:

A2-4

Source of Emission:

Power Generator A

Location:

Utilities Area

Grid Ref. (12 digit, 6E,6N):

086481E; 332974N

Vent Details Diameter:

Height above Ground(m):

0.4m (Internal) 15.0m

Date of commencement:

2014

Characteristics of Emission:

(i) Volume to be emitted:

Average/day 204,762 Nm3/d Maximum/day 255,824 Nm3/d

Maximum rate/hour 10,659 Nm3/h Min efflux velocity 13.1 m.sec-1

(ii) Other factors

Temperature 550 oC (max) 470 oC(min) 500 oC(avg)

For Combustion Sources: Volume terms expressed as : wet. √ dry. ___5___%O2

(iii) Period or periods during which emissions are made, or are to be made, including daily or seasonal variations (start-up

/shutdown to be included):

Periods of Emission (avg) 60 min/hr 24 hr/day 365 day/yr (Generators A/B/C – 2 Duty / 1 Standby A)

For

insp

ectio

n pur

pose

s only

.

Conse

nt of

copy

right

owne

r req

uired

for a

ny ot

her u

se.

EPA Export 17-04-2014:23:36:54