Contents
1.2.1 MAJOR ACTIVITIES UNDERTAKEN
ANNEX B Project Organisation Chart and
Contact Detail
List
of Tables
Table 1.1 Summary of Activities Undertaken in the
Reporting Period
Table 2.1 Hourly Average of Parameters Recorded for
CAPCS
Table 2.2 Hourly Average of Parameters Recorded for
CHP 1
Table 2.3 Hourly Average of Parameters Recorded for
CHP 2
Table 2.4 Hourly Average of Parameters Recorded for
CHP 3
Table 2.5 Hourly Average of Parameters Recorded for
ASP
Table 2.6 Hourly Average of Parameters Recorded for
the Standby Flaring Gas Unit
Table 2.7 Quantities
of Waste Generated from the Operation of the Project
The construction works of No.
EP/SP/61/10 Organic Resources Recovery Centre Phase 1 (the
Project) commenced on 21 May 2015. This is the
41st Quarterly Environmental Monitoring and Audit (EM&A) report
presenting the EM&A works carried out during the period from 1 June 2025 to
31 August 2025 in accordance with the EM&A Manual.
Non-compliance of emission limits of VOC and Total Odour from
CAPCS; NOx and SO2 from CHP1; NOx from CHP2; ; NOx and SO2 from CHP3; and CO, NOx,
SO2, VOC, NH3, HCl and HF from the ASP were recorded
during June 2025.
Non-compliance
of emission limits of Total Odour from CAPCS; NOx and SO2
from CHP1; NOx from CHP2; NOx from CHP3; CO, NOx,
SO2, VOC, NH3, HCl and HF from ASP; and HF from Standby
Flaring Gas Unit were recorded during July 2025.
Non-compliance
of emission limits of Total Odour from CAPCS; NOx from CHP1; NOx
from CHP2; NOx from the CHP3; CO, NOx, SO2,
VOC, NH3 and HF from ASP and HF from Standby Flaring Gas Unit were
recorded during August 2025.
Exceedances
occurred due to stack sensor issues and system instability.
Exceedances for the air emission limits for the CAPCS, CHP, ASP stacks,
and Standby Gas Flaring Unit were recorded during the reporting period.
No complaint was received during the
reporting period.
The Organic Resources Recovery
Centre (ORRC) Phase I development (hereinafter referred to as “the Project”) is
to design, construct and operate a biological treatment facility with a
capacity of about 200 tonnes per day and convert source-separated organic waste
from commercial and industrial sectors (mostly food waste) into compost and
biogas.
ERM-Hong Kong, Ltd (ERM)
has been appointed by OSCAR as the Environmental Team (ET) for the construction
phase EM&A programme and the Monitoring Team (MT) for the operation phase
EM&A programme for the implementation of the EM&A programme in accordance with the
requirements of the EP and the approved EM&A Manual.
The Project Site is located at Siu Ho Wan in
North Lantau with an area of about 2 hectares. The facility received an average of 104.65 to 118.4 tonnes
and treated an average of 83.43 to 94.02 tonnes of source separated organic
waste per day during the reporting period.
A summary of the major activities undertaken in
the reporting period is shown in Table 1.1.
Table 1.1 Summary of Activities Undertaken in the
Reporting Period
|
Activities Undertaken in the Reporting
Period |
|
· Operation of the Project,
including organic waste reception, operation of the pre-treatment facilities, anaerobic digesters,
composting facilities, air pollution control systems, on-line emission
monitoring system for the Centralised Air Pollution Control Unit (CAPCS), Co-generation
Units (CHP)s and Ammonia Stripping Plant (ASP), and the wastewater treatment
plant. |
The concentrations of concerned air
pollutants emitted from the stacks of the CAPCS, CHP, ASP and Standby Flaring
Gas Unit during the reporting period are monitored on-line by the continuous
environmental monitoring system (CEMS). The number of exceedances of the
concerned air emissions monitored for the CAPCS, CHP, ASP and Standby Flaring
Gas Unit during this reporting period are presented in Tables 2.1 to 2.6.
It should be noted that measurements recorded
under abnormal operating conditions, e.g., start up and stopping of stacks and
unstable operation, as well as test runs and interference of sensor, are
disregarded.
Table 2.1 Hourly Average of Parameters Recorded for
CAPCS
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) |
Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
VOCs (including
methane) (a) |
0 – 977 |
680 |
Identified (c) |
Stack sensor issue |
|
Dust (or TSP) |
0 – 0 |
6 |
Nil |
Nil |
|
Odour (including
NH3 & H2S) (b) |
0 – 1,635 |
220 |
Identified (d) |
Stack sensor issue, system unstable (e.g., low
efficiency) |
|
Notes: (a) The VOCs emission limit includes methane as biogas
is adopted, as fuel in the combustion process. (b) The odour unit is OU/Nm3. (c) Dates with VOC exceedances (number of exceedances on
that day) were identified on 13(2), 14(3), 18(6) and 20(1) June 2025. (d) Dates with Total Odour exceedances (number of
exceedances on that day) were identified on 25(4), 26(14) and 27(18) June
2025; 18(24), 19(24), 20(10), 21(5), 22(16), 23(15), 24(17), 25(17), 26(7),
27(2) and 30(1) July 2025; and 1(2), 3(6), 8(13), 9(16), 10(7), 11(2), 13(8),
14(8), 15(14), 16(15), 18(2), 19(4), 20(8), 21(4), 22(14), 23(14), 24(20),
25(10), 26(6), 27(2), 28(9), 29(11), 30(6) and 31(8) August 2025. |
||||
Table 2.2 Hourly Average of Parameters Recorded for
CHP 1
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3)
(a) |
Max. Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 – 11 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 94 |
650 |
Nil |
Nil |
|
NOx |
0 – 516 |
300 |
Identified (c) |
System unstable
(e.g., low efficiency) |
|
SO2 |
0 – 54 |
50 |
Identified (d) |
System unstable (e.g., low
efficiency) |
|
VOCs
(including methane) (b) |
0 – 576 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 5 |
10 |
Nil |
Nil |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust
gas of 6% and
dry basis. (b) The VOCs emission
limit includes methane as biogas is adopted as fuel in the combustion
process. (c) Dates with NOx exceedances (number of
exceedances on that day) were identified on 1(11), 2(19), 3(3), 6(1), 7(24),
8(18), 9(10), 10(15), 11(21), 12(16), 13(3), 14(7), 15(7), 16(5), 17(8),
19(4), 20(8), 21(1), 27(3), 28(17), 29(24) and 30(14) June 2025; 1(3), 2(7),
3(24), 4(21), 5(11), 6(2), 7(7), 8(24), 9(9), 10(11), 11(13), 12(24), 13(24),
14(21), 15(24), 16(24), 17(24), 18(24), 19(24), 20(4), 22(2), 23(13), 24(20),
25(2), 26(5), 27(4), 28(4), 29(7), 30(2) and 31(9) July 2025; and 1(5), 4(5),
5(3), 7(7), 8(20), 9(16), 10(18), 11(24), 12(19), 13(21), 14(7), 15(18),
16(24), 17(24), 18(24), 19(8), 20(12), 21(4), 22(1), 23(7), 24(5), 25(11),
26(8), 27(11), 28(7), 29(6), 30(15) and 31(18) August 2025. (d) Dates with SO2 exceedances
(number of exceedance on that day) were identified
on 19(1) June 2025 and 18(1) July 2025. |
||||
Table 2.3 Hourly Average of Parameters Recorded for
CHP 2
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3)
(a) |
Max. Emission Limit (mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 – 7 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 650 |
650 |
Nil |
Nil |
|
NOx |
0 – 468 |
300 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 24 |
50 |
Nil |
Nil |
|
VOCs (including methane) (b) |
0 – 1,370 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 9 |
10 |
Nil |
Nil |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust
gas of 6% and
dry basis. (b) The VOCs emission
limit includes methane as biogas is adopted as fuel in the combustion
process. (c) Dates with NOx exceedances (number of
exceedances on the day) were identified on 8(7), 9(16), 10(14), 11(6) and
20(2) June 2025; 1(6), 2(13), 22(1), 27(6) and 28(6) July 2025; and 13(1),
14(6), 15(4) and 27(1) August 2025. |
||||
Table 2.4 Hourly Average of Parameters Recorded for
CHP 3
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 13 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 388 |
650 |
Nil |
Nil |
|
NOx |
0 – 613 |
300 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 77 |
50 |
Identified (d) |
System unstable (e.g., low efficiency) |
|
VOCs (including methane)
(b) |
0 – 947 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 7 |
10 |
Nil |
Nil |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust
gas of 6% and dry basis. (b) The VOCs emission
limit includes methane as biogas is adopted as fuel in the combustion
process. (c) Dates with NOx exceedances (number of
exceedances on the day) were identified on 1(12), 2(16), 3(19), 4(21), 5(17),
6(13), 12(4), 13(18), 14(18), 15(22), 16(17), 17(15), 18(15), 19(15), 20(9),
21(23), 22(24), 23(21), 24(19), 25(24), 26(20), 27(18), 28(8), 29(1) and
30(6) June 2025; 1(18), 2(17), 3(13), 4(3), 5(20), 6(23), 7(8), 8(1), 12(9),
13(6), 17(1), 18(2), 19(3), 22(7), 23(11), 24(10), 25(23), 26(21), 27(20),
28(20), 29(15), 30(9) and 31(6) July 2025; and 1(2), 2(18), 3(22), 4(6),
5(7), 6(19), 7(16), 9(5), 10(4), 11(7), 12(15), 13(18), 15(8), 16(8), 17(11),
18(16), 19(21), 20(23), 21(24), 22(21), 23(22), 24(24), 25(24), 26(23),
27(19), 28(24), 29(9), 30(24) and 31(23) August 2025. (d) Date with SO2 exceedances (number
of exceedances on the day) was identified on 18(2) June 2025. |
||||
Table 2.5 Hourly Average of Parameters Recorded for
ASP
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 5 |
5 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 1,543 |
100 |
Identified (c) |
System unstable (e.g., low efficiency) |
|
NOx |
0 – 1,179 |
200 |
Identified (d) |
System unstable (e.g., low efficiency) |
|
SO2 |
0 – 276 |
50 |
Identified (e) |
System unstable (e.g., low efficiency) |
|
VOCs (including methane)
(b) |
0 – 3,415 |
20 |
Identified (f) |
System unstable (e.g., low efficiency) |
|
NH3 |
0 – 193 |
35 |
Identified (g) |
System unstable (e.g., low efficiency) |
|
HCl |
0 – 24 |
10 |
Identified (h) |
System unstable (e.g., low efficiency) |
|
HF |
0 – 5 |
1 |
Identified (i) |
System unstable (e.g., low efficiency) |
|
Notes: (a) All values refer to an oxygen content in the exhaust
gas of 11% and dry basis. (b) The VOCs emission limit
include methane as biogas is adopted as fuel in the combustion process. (c) Dates with CO exceedances (number of exceedances on
the day) were identified on 4(1), 5(1), 6(6), 7(5), 8(1), 10(4), 11(6),
12(3), 13(5), 14(4), 15(9), 16(4), 17(4), 18(1), 19(1), 21(3), 28(4) and
29(3) June 2025; 1(2), 2(5), 3(6), 4(2), 5(5), 6(5), 7(1), 10(1), 12(1),
14(2), 17(2), 18(3), 19(4), 20(2), 23(2) and 24(3) July 2025; and 12(1),
21(1), 22(1), 23(1), 27(1) and 29(1) August 2025. (d) Dates with NOx exceedances (number of
exceedances on the day) were identified on 1(24), 2(23), 3(21), 4(9), 5(2),
6(18), 7(11), 8(9), 9(10), 10(14), 11(16), 12(22), 13(19), 14(19), 15(16),
16(18), 17(12), 18(23), 19(21), 20(16), 21(24), 22(24), 23(24), 24(18),
25(24), 26(21), 27(14), 28(23), 29(17) and 30(24) June; 1(24), 2(24), 3(24),
4(19), 5(23), 6(23), 7(22), 8(10), 9(20), 10(14), 11(19), 12(24), 13(22),
14(15), 15(19), 16(24), 17(22), 18(24), 19(23), 20(21), 21(5), 22(18),
23(23), 24(23), 25(23), 26(22), 27(17), 28(23), 29(22), 30(10) and 31(17)
July 2025; and 1(23), 2(24), 3(22), 4(24), 5(16), 6(14), 7(16), 8(24), 9(24),
10(16), 11(17), 12(22), 13(21), 14(22), 15(24), 16(10), 17(24), 18(24),
19(12), 20(5), 21(10), 22(9), 23(15), 24(9), 25(19), 26(24), 27(19), 28(8),
29(14), 30(21) and 31(5) August 2025. (e) Dates with SO2 exceedances (number of
exceedances on the day) were identified on 4(1), 6(4), 10(2), 11(1), 12(3),
14(2), 15(5), 17(3), 18(17), 19(15), 20(3), 22(1), 28(1) and 29(1) June 2025;
1(1), 2(5), 3(5), 4(1), 5(2), 6(3), 7(1), 9(1), 10(2), 17(1), 18(15), 19(13),
20(1), 22(4), 23(2) and 24(1) July 2025; and 21(1), 22(1) and 23(1) August
2025. (f) Dates with VOC exceedances (number of exceedances on
the day) were identified on 4(1), 5(1), 6(6), 7(6), 8(2), 10(6), 11(6),
12(3), 13(6), 14(4), 15(9), 16(6), 17(7), 18(2), 19(3), 21(3), 24(1), 28(4)
and 29(4) June 2025; 1(2), 2(7), 3(6), 4(3), 5(5), 6(5), 7(1), 10(1), 11(2),
12(1), 14(2), 16(1), 17(2), 18(3), 19(4), 20(2), 21(1), 23(2) and 24(3) July
2025; and 11(2), 12(1), 21(1), 22(1), 23(1), 27(1) and 29(1) August 2025. (g) Dates with NH3 exceedances (number of
exceedances on the day) were identified on 4(1), 5(2), 6(8), 7(10), 8(7),
9(4), 10(13), 11(12), 12(6), 13(8), 14(6), 15(13), 16(9), 17(8), 18(1),
19(8), 20(2), 21(4), 24(4), 25(1), 26(2), 27(1), 28(12) and 29(7) June 2025;
1(1), 2(11), 3(11), 4(6), 5(11), 6(6), 7(3), 8(1), 11(6), 12(1), 13(1),
14(5), 17(2), 18(2), 19(13), 20(3), 23(2), 24(2), 25(1), 26(1) and 31(8) July
2025; and 6(3), 12(2), 16(6), 21(1), 22(2), 23(2), 27(1), 29(2) and 31(5)
August 2025. (h) Dates with HCl exceedances (number of exceedances on
the day) were identified on 6(2), 10(1), 11(1), 12(1), 14(1), 15(4) and 17(1)
June 2025; 3(2), 5(2), 7(1), 17(1), 19(1) and 24(1) July 2025. (i) Dates with HF exceedances (number of exceedances on
the day) were identified on 6(16), 7(1), 8(1), 9(1), 10(5), 11(4), 12(2),
13(1), 14(2), 15(7), 16(3), 17(3), 20(1), 27(1), 28(2) and 29(1) June 2025;
1(1), 2(2), 3(4), 4(1), 5(5), 6(4), 7(1), 11(1), 14(6), 15(1), 16(1), 17(1),
18(2), 19(9), 20(3), 22(5), 23(1), 24(7), 27(2), 28(1) and 31(4) July 2025;
and 1(3), 3(2), 5(1), 6(1), 12(1), 14(2), 16(2), 21(1) and 23(1) and 29(1)
August 2025. |
||||
Table 2.6 Hourly Average of Parameters Recorded for
the Standby Flaring Gas Unit
|
Parameter |
Range of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit (mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 0 |
5 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 10 |
100 |
Nil |
Nil |
|
NOx |
0 – 20 |
200 |
Nil |
Nil |
|
SO2 |
0 – 15 |
50 |
Nil |
Nil |
|
VOCs (including methane)
(b) |
0 – 13 |
20 |
Nil |
Nil |
|
HCl |
0 – 0 |
10 |
Nil |
Nil |
|
HF |
0 – 3 |
1 |
Identified
(c) |
System unstable (e.g., low efficiency) |
|
Notes: (a) All values refer to an oxygen content in the exhaust
gas of 11% and dry basis. (b) The VOCs emission limit include methane as biogas is
adopted as fuel in the combustion process. (c) Dates with HF exceedances (number of exceedances on
that day) were identified on 18(2) July 2025 and 10(1) and 27(1) August 2025. |
||||
Odour
patrols were conducted by the independent odour patrol team of ALS Technichem (HK) Pty Ltd on 15 July 2025, 28 July 2025 and 7
August 2025.
Environmental
mitigation measures (related to air quality, water quality, waste, land
contamination, hazard-to-life, and landscape and visual) to be implemented
during the operation phase of the Project are recommended in the approved EIA
Report and EM&A Manual. Monthly site audits for June 2025 to August
2025 have been carried out to check the implementation of these mitigation
measures. Follow-up actions resulting from the site audits were generally
taken as reported by the Contractor. The Contractor has implemented
environmental mitigation measures recommended in the approved EIA Report and
EM&A Manual.
The monthly inspections of the landscape and
visual mitigation measures for the operation phase of the Project were performed on 17 June
2025, 29 July 2025 and 26 August 2025, and no non-compliance in relation to the
landscape and visual mitigation measures were identified.
Wastes generated from the operation of the
Project include chemical waste, wastes generated from pre-treatment process and
general refuse. The quantities of different types of waste generated from
the operation of the Project in the reporting period are summarised in Table
2.7.
Table 2.7
Quantities of Waste Generated from the Operation of the Project
|
Month / Year |
Chemical Waste |
Waste Generated from |
General Refuse |
||
|
|
Disposal of at CWTC |
Disposed of at Landfill (a) |
Recycled (b) |
Disposed of at Landfill (a) (e) |
Recycled (c) |
|
June 2025 |
16,020 L (d) |
641.69 tonnes |
0 tonnes |
2.880 tonnes (e) |
0.030 tonnes |
|
July 2025 |
8,000 L (d) |
657.84 tonnes |
0 tonnes |
2.995 tonnes (e) |
0.027 tonnes |
|
August 2025 |
0 L (d) |
755.72 tonnes |
0 tonnes |
2.995 tonnes (e) |
0.031 tonnes |
|
Notes: (a) Waste generated from pre-treatment process and
general refuse other than chemical waste and recyclables were disposed of at
NENT landfill by sub-contractors. (b) Among waste generated from pre-treatment process, no
metals, papers/ cardboard packing or plastics were sent to recyclers for
recycling during the reporting period. (c) Among general refuse, 0.08 tonnes of papers/
cardboard packing and 0.008 tonnes of plastics were sent to recyclers for
recycling during the reporting period. No metals were sent to recyclers
for recycling during the reporting period. (d) 16,020 L of chemical waste (16,000 L of unwanted
flocculation agent and 20 L of spent acid) were disposed of at CWTC in June
2025; 8,000 L of chemical waste (8,000 L of unwanted flocculation agent) were
disposed of at CWTC in July 2025; and no chemical waste was disposed of at
CWTC in August 2025. (e) It was assumed that four 240-litre bins filled with
80% of general refuse were collected at each collection. The general refuse
density was assumed to be around 0.15 kg/L. |
|||||