This
section identifies the potential wastes arising from the construction and
operation of a LNG terminal on South Soko Island and
assesses the environmental impacts associated with waste handling and
disposal. The main issues are:
·
Management
of dredged marine sediment;
·
Handling
and disposal of contaminated soil/sediments;
·
Handling
and disposal of construction and demolition (C&D) materials ([1])
arising from the demolition, excavation and construction works; and
·
Chemical
wastes, sewage, general refuse and industrial wastes.
Waste
avoidance, minimisation, reuse and recycling, storage, collection, transport
and disposal schemes have been examined and appropriate measures for waste
reduction and management have been proposed.
7.2
Legislation
Requirements and Evaluation Criteria
The
following discussion on legislative requirements and evaluation criteria
applies to both the construction and operational phases of the LNG
terminal. The criteria and guidelines
for evaluating potential waste management implications are laid out in Annexes 7 and 15 of the EIAO-TM under
the EIAO (Cap 499). The following
legislation covers, or has some bearing upon the handling, treatment and
disposal of the wastes generated from the construction and operation of the LNG
terminal.
·
Waste Disposal Ordinance (Cap 354);
·
Waste Disposal (Chemical Waste) (General)
Regulation (Cap 354C);
·
Land (Miscellaneous Provisions) Ordinance
(Cap 28)
·
Public Health and Municipal Services
Ordinance (Cap 132) - Public Cleansing and Prevention of Nuisances Regulation; and
·
Dumping at Sea Ordinance (Cap 466).
7.2.1
Waste Disposal Ordinance (Cap 354)
The
Waste Disposal Ordinance (WDO)
prohibits the unauthorised disposal of wastes, with waste defined as any
substance or article, which is abandoned.
Construction waste is not directly defined in the WDO but is considered to fall within the category of ‘trade
waste’. Trade waste is defined as waste
from any trade, manufacturer or business or any wasted building, or civil
engineering materials, but does not include animal waste.
Under
the WDO, wastes can only be disposed
of at a licensed site. The WDO provides for the issuing of licences
for the collection and transport of wastes.
Licences are not, however, currently issued for the collection and
transport of construction waste or trade waste.
The
Waste Disposal (Charges for Disposal of
Construction Waste) Regulation defined construction waste as any substance,
matters or things that is generated from construction work and abandoned,
whether or not it has been processed or stockpiled before being abandoned. It does not include any sludge, screening or
matter removed in or generated from any desludging, desilting or dredging works.
The
Construction Waste Disposal Charging Scheme entered into operation on 1
December 2005. Starting from 1 December
2005, the main contractor who undertakes construction work under a contract
with value of HK$1 million or above is required to open a billing account
solely for the contract for waste disposal.
Application shall be made within 21 days after the contract is awarded. Under the Scheme, charging for disposal of
construction waste started on 20 January 2006 and therefore will apply to this
Project.
Depending
on the percentage of inert materials in the construction waste, inert
construction waste can be disposed of at public fill reception facilities. However mixed construction waste can be
disposed of at construction waste sorting facilities, landfills and Outlying
Islands Transfer Facilities which have different disposal costs. The scheme encourages reducing, reusing and
sorting of construction waste such that the waste producer can reduce their
disposal fee. Table 7.1 summarises the government construction waste disposal
facilities, types of waste accepted and disposal cost.
Table 7.1 Government Facilities for Disposal of
C&D Materials
Government Waste Disposal
Facilities |
Type of Construction Waste
Accepted |
Charge (HK$/Tonne) |
Public
fill reception facilities |
Consisting
entirely of inert construction waste |
$27 |
Sorting
facilities |
Containing
more than 50% by weight of inert construction waste |
$100 |
Landfills
|
Containing
not more than 50% by weight of inert construction waste |
$125 |
Outlying
Islands Transfer Facilities |
Containing
any percentage of inert construction waste |
$125 |
7.2.2
Waste Disposal (Chemical Waste) (General)
Regulation (Cap 354C)
Chemical
waste as defined under the Waste Disposal
(Chemical Waste) (General) Regulation includes any substance being scrap
material, or unwanted substances specified under Schedule 1 of the Regulation,
if the specified substance or chemical occurs in such a form, quantity or
concentration so as to cause pollution or constitute a danger to health or risk
of pollution to the environment.
A
person should not produce, or cause to be produced, chemical wastes without
registration with the EPD. Chemical
wastes must either be treated using on-site facility licensed by EPD or be
collected by a licensed collector for off-site treatment at a licensed facility. Under EPD regulations, the waste producer,
collector and disposal facility must sign all relevant parts of a computerised
trip ticket for each consignment of waste.
The computerized system is designed to allow the transfer of wastes to
be traced from cradle-to-grave.
The
EPD Regulation prescribes storage
facilities to be provided on site which include labelling and warning
signs. To reduce the risks of pollution
and danger to human health or life, the waste producer is required to prepare
and make available written emergency procedures for spillage, leakage or
accidents arising from the storage of chemical wastes. They must also provide
their employees with training on such procedures.
7.2.3
Land (Miscellaneous Provisions) Ordinance
(Cap 28)
The
inert portion of C&D materials (also called public fill) may be taken to
public fill reception facilities. Public
filling areas usually form part of land reclamation schemes and are operated by
the Civil Engineering and Development Department (CEDD) and others. The Land
(Miscellaneous Provisions) Ordinance requires that individuals or companies
who deliver public fill to the public fill reception facilities to obtain a
Dumping Licence from the CEDD.
Under
the licence conditions, public fill reception facilities will only accept earth,
soil, sand, rubble, brick, tile, rock, boulder, concrete, asphalt, masonry or
used bentonite..
In addition, in accordance with paragraph 11 of the ETWB TC(W)
No.31.2004, Public Fill Committee will advise on the acceptance criteria (e.g.
no mixing of construction waste, nominal size of the materials less than 250mm,
etc). The material should, however, be
free from marine mud, household refuse, plastic, metal, industrial and chemical
wastes, animal and vegetable matter and any other materials considered unsuitable
by the public fill reception facility supervisor.
7.2.4
Public Health and Municipal Services
Ordinance (Cap 132) - Public Cleansing and Prevention of Nuisances Regulation
This
Regulation provides a further control
on the illegal dumping of wastes on unauthorised (unlicensed) sites.
7.2.5
Dumping at Sea Ordinance (Cap 466)
This
Ordinance came into operation in
April 1995 and empowers the Director of Environmental Protection (DEP) to
control the disposal and incineration of substances and articles at sea for the
protection of the marine environment.
Under the Ordinance, a permit
from the DEP is required for the disposal of regulated substances within and
outside the waters of the Hong Kong SAR.
The permit contains terms and conditions that includes the following
specifications:
·
Type
and quantity of substances permitted to be dumped;
·
Location
of the disposal grounds;
·
Requirement
of equipment for monitoring the disposal operations; and
·
Environmental
monitoring requirements.
Management
of Dredged/Excavated Sediments for Marine Disposal
Marine
disposal of any dredged/excavated sediment is subject to control under the Dumping at Sea Ordinance 1995. Dredged/excavated sediment destined for
marine disposal is classified based on its contaminant levels with reference to
the Chemical Exceedance
Levels (CEL), as stipulated in ETWBTC
No. 34/2002: Management of
Dredged/Excavated Sediment. This
Technical Circular includes a set of sediment quality criteria, as presented in
Table 7.2, which includes heavy
metals and metalloids, organic pollutants and a class of contamination level
for highly contaminated sediment not suitable for marine disposal.
Table 7.2 Dredged/Excavated Sediment Quality
Criteria for the Classification under the ETWBTC No 34/2002
Contaminants |
Lower Chemical
Exceedance Level (LCEL) |
Upper Chemical
Exceedance Level (UCEL) |
Metals (mg kg-1
dry weight) |
||
Cd |
1.5 |
4 |
Cr |
80 |
160 |
Cu |
65 |
110 |
Hg |
0.5 |
1 |
Ni (a) |
40 |
40 |
Pb |
75 |
110 |
Silver (Ag) |
1 |
2 |
Zinc (Zn) |
200 |
270 |
Metalloid (mg kg-1 dry
weight) |
||
Arsenic (As) |
12 |
42 |
Organic-PAHs (mg
kg-1 dry weight) |
||
Low Molecular
Weight (LMW) PAHs |
550 |
3,160 |
High Molecular
Weight (HMW) PAHs |
1,700 |
9,600 |
Organic-non-PAHs
(mg
kg-1 dry weight) |
||
Total PCBs |
23 |
180 |
Organometallics (mgTBT l-1 in interstitial water) |
||
Tributyl-tin (a) |
0.15 |
0.15 |
Note: (a)
The
contaminant level is considered to have exceeded the UCEL if it is greater
than the value shown. |
In
accordance with ETWBTC 34/2002, the sediment is classified into three
categories based on its contamination levels:
Category
L : Sediment with all contaminant levels
not exceeding the LCEL. The material
must be dredged, transported and disposed of in a manner which reduces the loss
of contaminants either into solution or by re-suspension.
Category
M : Any one or more contaminants in the
sediment exceeding the LCEL with none exceeding the UCEL. The material must be dredged and transported
with care, and must be effectively isolated from the environment upon final
disposal unless appropriate biological tests demonstrate that the material will
not adversely affect the marine environment.
Category
H : Any one or more contaminants in the
sediment exceeding the UCEL. The
material must be dredged and transported with great care, and must be
effectively isolated from the environment upon final disposal.
Figure 7.1
summarises the sediment classification and disposal arrangements. EPD will use the sediment and biological test
results to determine the most appropriate disposal site (e.g., open sea or
confined marine disposal site).
Figure 7.1 Management Framework for
Dredged/Excavated Sediment
Notes:
1.
Most
open sea disposal sites are multi-user facilities and as a consequence their management
involves a flexibility to accommodate varying and unpredictable circumstances.
Contract documents will include provisions to allow the same degree of
flexibility to divert from one disposal site to another during the construction
period of a contract.
2.
Dedicated
Sites will be monitored to confirm that there is no adverse impact.
3.
For
sediment requiring Type 2 or Type 3 disposal, contract documents will state the
allocation conditions of Marine Fill Committee (MFC) and DEP. At present, East Sha Chau Mud Pits are designated
for confined marine disposal.
4.
If
any sediment suitable for Type 3 disposal (Category H sediment failing the
biological dilution test) is identified, it is the responsibility of the
project proponent, in consultation with DEP, to identify and agree, the most
appropriate treatment and/or disposal arrangement. Such a proposal is likely to
be very site and project specific and therefore cannot be prescribed. This does
not preclude treatment of this sediment to render it suitable for confined
marine disposal.
5.
The
allocation of disposal space may carry a requirement for the project proponent
to arrange for chemical analysis of the sediment sampled from 5% of the vessels
en-route to the disposal site. For Category M and certain Category H sediment,
the chemical tests will be augmented by biological tests. Vessel sampling will
normally entail mixing five samples to form a composite sample from the vessel
and undertaking laboratory tests on this composite sample. All marine disposal
sites will be monitored under the general direction of the CEDD. However,
exceptionally large allocations might require some additional disposal site
monitoring. These will be stipulated at the time of allocation.
6.
Trailer
suction hopper dredgers disposing of sediment at the East Sha
Chau Mud Pits must use a down-a-pipe disposal method,
the design of which must be approved in advance by Director of the CEDD. The
dredging contractor must provide equipment for such disposal.
Source: Appendix C, ETWBTC 34/2002
In accordance with Building Ordinance Office Practice Note for
Authorised Persons and Registered Structural Engineers No 155, any proposal
to remove more than 500,000 m3 of clean mud or any quantity of
contaminated mud must be justified on both cost and environmental grounds. The rationale for such removal will also be
provided to enable an allocation for disposal to be considered. Therefore it is desirable to demonstrate that
any proposed mud dredging has been reduced as far as reasonably and safely
practicable and to obtain, in-principle, an agreement from the Secretary of the
MFC of the CEDD at an early stage. For
projects which involve marine disposal of dredged/excavated sediments, the Practice Note for Authorised Persons No 252
will be followed.
7.2.6
Other Relevant Guidelines
Other
guideline documents which detail how the Contractor will comply with the WDO
and its associated regulations include:
·
Waste Disposal Plan for Hong Kong
(December 1989), Planning, Environment and Lands Branch Government Secretariat,
Hong Kong Government;
·
Chapter 9 - Environment (1999),
Hong Kong Planning Standards and Guidelines, Hong Kong Government;
·
New Disposal Arrangements for Construction
Waste (1992), EPD & CED, Hong Kong
Government;
·
Code of Practice on the Packaging, Labelling
and Storage of Chemical Wastes
(1992), EPD, Hong Kong Government;
·
Works Branch Technical Circular (WBTC) No.
32/92, The Use of Tropical Hard Wood on Construction Site;
Works Branch, Hong Kong Government;
·
WBTC No. 2/93, Public Dumps. Works
Branch, Hong Kong Government;
·
WBTC No. 2/93B, Public Filling Facilities,
Works Branch, Hong Kong Government;
·
WBTC No. 16/96, Wet Soil in Public Dumps;
Works Branch, Hong Kong Government;
·
WBTC Nos. 4/98 and 4/98A, Use of Public Fill in Reclamation
and Earth Filling Projects; Works Bureau, Hong Kong SAR Government;
·
Waste Reduction Framework Plan, 1998 to
2007, Planning, Environment and Lands Bureau,
Government Secretariat, 5 November 1998;
·
WBTC Nos. 25/99, 25/99A and 25/99C, Incorporation of Information on Construction
and Demolition Material Management in Public Works Sub-committee Papers;
Works Bureau, Hong Kong SAR Government;
·
WBTC No. 12/2000, Fill Management;
Works Bureau, Hong Kong SAR Government;
·
WBTC No. 19/2001, Metallic Site Hoardings
and Signboards; Works Bureau, Hong Kong SAR Government;
·
WBTC Nos. 6/2002 and 6/2002A, Enhanced Specification for Site
Cleanliness and Tidiness. Works Bureau, Hong Kong SAR Government;
·
WBTC No. 11/2002, Control of Site Crusher.
Works Bureau, Hong Kong SAR Government;
·
WBTC No. 12/2002, Specification
Facilitating the Use of Recycled Aggregates. Works
Bureau, Hong Kong SAR Government;
·
ETWBTC No. 33/2002, Management of
Construction and Demolition Material Including Rock; Environment, Transport and Works
Bureau, Hong Kong SAR Government;
·
ETWBTC No. 34/2002, Management of
Dredged/Excavated Sediment; Environment,
Transport and Works Bureau, Hong Kong
SAR Government;
·
ETWBTC No. 31/2004, Trip Ticket System for
Disposal of Construction & Demolition Materials,
Environment, Transport and Works Bureau, Hong Kong SAR Government; and
·
ETWBTC No. 19/2005, Environmental
Management of Construction Site, Environment,
Transport and Works Bureau, Hong Kong SAR Government.
7.3.1
Construction Phase
During
the construction phase, the main activities, which will result in generation of
waste, include site clearance, site formation, blasting, dredging, reclamation,
seawall construction, filling and concreting.
Optioneering has been conducted to try to avoid
waste generation and reuse and recycling of waste generated from the
construction of the terminal during the planning and design stages and
consideration of options for layout, construction methods and programme, and
the proposed scheme comprises the Applicants’ proposed best balance.
The typical waste types associated with
these activities include:
·
Dredged
marine sediment;
·
C&D
materials;
·
Chemical
waste;
·
Sewage;
and
·
General
refuse.
7.3.2
Operational Phase
The
following wastes will be generated from the operation of the LNG terminal:
·
Dredged
sediment
during infrequent (once every ten years) maintenance dredging;
·
Industrial
waste;
·
Chemical
waste;
·
Sewage;
and
·
General
refuse.
The
potential environmental impacts associated with the handling and disposal of
waste arising from the construction and operation of the LNG terminal at South Soko were assessed in accordance with the criteria
presented in Annexes 7 and 15 of the EIAO-TM and summarised as follows:
·
Estimation
of the types and quantities of the wastes to be generated based on information
provided by the engineering design team and the relevant researches and studies
on waste arisings;
·
Assessment
of the secondary environmental impacts due to the management of waste with
respect to potential hazards, air and odour emissions, noise, wastewater
discharges and traffic; and
·
Assessment
of the potential impacts on the capacity of waste collection, transfer and
disposal facilities.
7.5
Waste Management Assessment
7.5.1
Construction Phase
Dredged
Marine Sediment
To
enable the safe transit of the LNG carrier, dredging along the approach
channel, berthing area, and turning basin will be necessary. For the construction of submarine gas
pipeline, water supply pipeline and the submarine power supply cable (see Figures 7.2
to 7.3)
dredging will be limited to those areas in which jetting is not appropriate
(see Section 2 for further details).
The quantities of sediment to be dredged are considered as the best
estimate based on the available site investigation data.
Approximately
0.6 hectares of land will be reclaimed immediately to the west of the newly
formed site formation platform, for the construction of the berthing area for
smaller vessels and a lay down area. The
reclamation area will be partially dredged (see Part 2 - Section 2). The
dredging work for the construction of the seawalls will be carried out for
approximately two months. A total of
approximately 0.10 Mm3 of marine sediment will be dredged (see Table
7.5).
Dredging
work will be carried out at Sai Wan to provide a
berthing trench for the construction barges.
A total of approximately 0.12 Mm3 of marine sediment will be
dredged.
The
dredging work for the turning basin and approach channel will be carried out
for about three months. A total of
approximately 1.07 Mm³ of marine sediments will be dredged (see Table 7.5).
A
water supply pipeline and a power cable linking South Soko
and Shek Pik in Lantau are proposed.
Approximately 0.22 Mm³ of marine sediments will need to be dredged for
the construction of these lines.
A
submarine gas pipeline (approximately 38-km long) linking the proposed LNG
terminal at the South Soko Island to the existing
Black Point Power Station and a Gas Receiving Station (GRS) will need to be
constructed. The construction of the
pipeline will use dredging method. A
total of about 2.06 Mm³ of marine sediments will be dredged (see Table 7.5).
Dredging
will be required for the construction of seawater intake and outfall. About 0.03 Mm3 of marine sediment
will be dredged (see Table 7.5).
Less
than 0.5 hectare of land will be reclaimed for the Gas Receiving Station at
Black Point. The dredging work for the
construction of the seawalls will be carried out for approximately 1
month. Approximately 0.29 Mm3
of marine sediment will be dredged (see Table 7.5).
Contaminated
Dredged Marine Sediment
A
preliminary marine sediment sampling programme has been undertaken as part of
the EIA Study to provide an indication of the quality of the sediment and the
volumes of different types of sediment to be dredged. The sediment sampling programme (including
the sampling stations, the chemical analysis suite and the biological testing
programmes) was developed based on the guidelines described in ETWBTC 34/2002. The sampling and testing programmes are
summarised in Table 7.3 and the sampling locations presented in Figures
7.2 to 7.3 ([2]).
Table
7.3 Marine Sediment Sampling and
Testing Programme
Sampling Location |
ETWBTC Grab (a) |
ETWBTC Vibrocore
(b) |
Additional Grab Sampling |
Pipeline route from Black Point to
South Soko |
|||
GSH6 |
ü |
|
ü |
GSH7 |
ü |
|
|
GSH8 |
ü |
|
ü |
CP11 |
|
ü |
|
GSH9 |
ü |
|
ü |
DC2 |
|
ü |
|
GSH10 |
ü |
|
|
GSH11 |
ü |
|
ü |
GSH12 |
ü |
|
ü |
GSH13 |
ü |
|
|
GSH14 |
ü |
|
|
GSH15 |
ü |
|
ü |
GV 16 |
ü |
ü |
ü |
GV 17 |
ü |
ü |
ü |
GV 18 |
ü |
ü |
ü |
GV 19 |
ü |
ü |
ü |
Southwest Lantau
Potential Marine Park |
|||
GSH35 |
ü |
|
ü |
GSH36 |
ü |
|
|
GSH37 |
ü |
|
|
GSH38 |
ü |
|
|
GSH20 |
ü |
|
|
GSH21 |
ü |
|
ü |
CP18 |
|
ü |
|
DC22 |
|
ü |
|
GSH39 |
ü |
|
|
GSH40 |
ü |
|
|
GSH22 |
ü |
|
|
GSH41 |
ü |
|
|
GSH42 |
ü |
|
|
Potential Reclamation Area at South
Soko |
|||
GSH23 |
ü |
|
ü |
Potential Dredging Areas around
South Soko |
|||
GSH24 |
ü |
|
|
GSH25 |
ü |
|
|
GSH26 |
ü |
|
|
GV 43 |
ü |
ü |
|
GV 44 |
ü |
ü |
ü |
GSH27 |
ü |
|
|
GSH28 |
ü |
|
|
GSH29 |
ü |
|
|
GV 30 |
ü |
ü |
ü |
GSH31 |
ü |
|
ü |
GSH32 |
ü |
|
|
GSH33 |
ü |
|
|
GSH45 |
ü |
|
ü |
GV 34 |
ü |
ü |
|
Notes: (a)
All sediment grab samples were analysed for
sediment quality parameters as listed in the Appendix A of the ETWBTC
34/2002. (b)
Vibrocore samplings were conducted and
samples analysed for sediment quality parameters as listed in the Appendix A
of the ETWBTC 34/2002 at these locations. |
A
combination of grab samples and vibrocore samples
were taken within the proposed Project area.
Vibrocore samples were taken either down to
the proposed dredging depth (i.e. at seabed, 0.9m, 1.9m, 2.9m below the seabed,
every 3m thereafter and at the end of the vibrocore
sampling) or upon refusal, or when encountering rock head in order to determine
the depth of contaminated marine deposit.
The contaminants tested include all the contaminants stated in Table
1 - Analytical Methodology in Appendix B of ETWBTC No 34/2002 plus
PCBs and 12 Chlorinated Pesticides.
Tier
III biological screening was also performed on samples where one or more contaminant
level exceeded the Lower Chemical Exceedance Level
(LCEL) and exceeded 10 times the Upper Chemical Exceedance
Level (UCEL) ([3]). The ecotoxicological-testing
programme featured a suite of tests that include three phylogenetically
distinct species (amphipod, polychaete and bivalve
larvae) which interact with bedded sediments in different ways. The objective of the bioassays is to
determine if there are any potential risks of toxicological impacts from the
sediment to the marine biota, and whether there is any difference in the
toxicity of the sediments samples taking from the Project site and the
reference station (collected from a clean area in Port Shelter, New
Territories). The chemical and
biological analysis results of the marine sediment are presented in Table
7.4. All sediment samples tested
have negligible concentration of toxic organics since they were all below the
detection limits of the chemical analysis.
Based
on the results of the preliminary marine sediment sampling programme, all the
measured parameters of marine sediments to be dredged at seawall, berthing
trench, seawater intake and outfall, water and power supply line were found to
be uncontaminated and would be disposed to Type 1 open sea disposal site. The estimated quantities of uncontaminated
sediment to be dredged under different works are summarized in Table 7.5.
Majority
of sediments to be dredged at turning basin and approach channel (i.e., 1.06 Mm3)
were found to be uncontaminated and about 0.01 Mm3 of sediments were
found to be category M contaminated and will be disposed to Type 2 confined
marine disposal site.
At
present the East of Sha Chau
Mud Pits are designated for confined marine disposal. Due to the size of these pits it is noted
that capacity may not be available at the time of disposal. In view of such a situation an alternative
site for confined marine disposal would be identified in discussion with the
Marine Fill Committee (MFC) and the EPD.
Heavy
metal concentrations (including nickel, lead, arsenic and silver) of the
sediment samples obtained in locations within the proposed dredging areas along
the pipeline route (west of Black Point, Black Point to South Soko and to the south of South Soko
Island) exceeded the LCEL and the sediments were classified as Category M. The nickel concentration at DC2 exceeded the
UCEL and the sediment was therefore classified as Category H. Biological testing was undertaken for those
Category M samples. Category M sediment
samples at locations DC2, GSH39 and GSH40 failed the biological screening and
hence these sediments together with the Category H sediments will require
disposal at a confined marine disposal site (i.e. Type 2 disposal, a total of
about 0.61 Mm3). The
remaining Category M sediment passed the biological screening and it is
estimated that a total of about 0.94 Mm3 of the Category M sediment
could be disposed at a Type 1 dedicated open sea disposal site. About 2.34 Mm3 of the total
dredged sediments are uncontaminated and hence could be disposed at Type 1 open
sea disposal site (see Table 7.5).
In
summary, a total of 3.89 Mm3 of marine sediments would be dredged
which has considered leaving the marine sediment in place as far as
possible. About 2.34 Mm3 of
sediments were found to be uncontaminated and would be disposed at Type 1 open
sea disposal site. About 0.94 Mm3
of Category M contaminated marine sediments (passed biological screening) would
be disposed at Type 1 dedicated open sea disposal site. About 0.60 Mm3 of Category M
contaminated (failed biological screening) sediment and Category H contaminated
sediment would be disposed at Type 2 confined marine disposal site. The detailed breakdown of estimated
quantities of different types of marine sediments is summarized in Table 7.5.
Table
7.4 Marine Sediment Testing
Results
Sample Reference |
Heavy Metals (mg kg-1) |
Sediment Category |
Biological Sample No. |
Failed Biological Tests |
Final Disposal |
||||||||||||
Drillhole No. |
Depth (m) From-To |
Cadmium (Cd) |
Chromium (Cr) |
Copper (Cu) |
Nickel (Ni) |
Lead (Pb) |
Zinc (Zn) |
Mercury (Hg) |
Arsenic (As) |
Silver (Ag) |
Amphipod |
Bivalve |
Polychaete |
||||
Reporting Limits |
0.1 |
1 |
1 |
1 |
1 |
10 |
0.05 |
1 |
0.1 |
|
|
|
|
||||
LCEL |
|
1.5 |
80 |
65 |
40 |
75 |
200 |
0.5 |
12 |
1 |
|
|
|
|
|
|
|
UCEL |
|
4 |
160 |
110 |
40 |
110 |
270 |
1 |
42 |
2 |
|
|
|
|
|
|
|
GSH6 |
|
<0.2 |
51 |
57 |
35 |
46 |
140 |
0.16 |
17 |
1.1 |
M |
6 |
|
|
|
Type 1 Dedicated Site |
|
GSH7 |
|
0.2 |
35 |
41 |
21 |
37 |
100 |
NA |
11 |
NA |
L |
6 |
|
|
|
Type 1 |
|
GSH8 |
|
0.4 |
49 |
61 |
32 |
44 |
135 |
0.18 |
20 |
0.5 |
M |
7 |
|
|
|
Type 1 Dedicated Site |
|
CP11 |
0.43-0.90m |
0.3 |
39 |
61 |
28 |
45 |
130 |
NA |
17 |
NA |
M |
12 |
|
|
|
Type 1 Dedicated Site |
|
CP11 |
0.90-1.90m |
0.2 |
30 |
29 |
20 |
34 |
87 |
NA |
14 |
NA |
M |
12 |
|
|
|
Type 1 Dedicated Site |
|
CP11 |
1.90-2.90m |
0.4 |
42 |
48 |
30 |
53 |
140 |
NA |
21 |
NA |
M |
12 |
|
|
|
Type 1 Dedicated Site |
|
CP11 |
2.90-4.00m |
0.2 |
32 |
37 |
21 |
41 |
110 |
NA |
17 |
NA |
M |
12 |
|
|
|
Type 1 Dedicated Site |
|
CP11 |
4.00-5.00m |
0.2 |
37 |
41 |
17 |
45 |
120 |
NA |
18 |
NA |
M |
12 |
|
|
|
Type 1 Dedicated Site |
|
GSH9 |
|
0.4 |
54 |
65 |
35 |
49 |
150 |
0.18 |
25 |
0.5 |
M |
8 |
|
|
|
Type 1 Dedicated Site |
|
DC2 |
0.42-0.90m |
0.3 |
43 |
61 |
33 |
48 |
130 |
NA |
18 |
NA |
M |
9 |
|
|
|
Type 1 Dedicated Site |
|
DC2 |
0.90-1.90m |
0.2 |
40 |
48 |
28 |
45 |
130 |
NA |
22 |
NA |
M |
9 |
|
|
|
Type 1 Dedicated Site |
|
DC2 |
1.90-2.90m |
0.9 |
53 |
75 |
41 |
62 |
190 |
NA |
30 |
NA |
H |
|
|
|
|
Type 2 |
|
DC2 |
2.90-4.00m |
0.2 |
41 |
50 |
29 |
49 |
140 |
NA |
19 |
NA |
M |
11 |
|
x |
x |
Type 2 |
|
DC2 |
4.00-5.00m |
0.7 |
45 |
58 |
33 |
62 |
180 |
NA |
32 |
NA |
M |
11 |
|
x |
x |
Type 2 |
|
GSH10 |
|
0.2 |
28 |
21 |
17 |
38 |
80 |
NA |
13 |
NA |
M |
8 |
|
|
|
Type 1 Dedicated Site |
|
GSH11 |
|
<0.2 |
36 |
16 |
23 |
34 |
80 |
0.06 |
14 |
0.1 |
M |
NA |
|
|
|
Type 1 Dedicated Site |
|
GSH12 |
|
<0.2 |
44 |
39 |
30 |
40 |
111 |
0.11 |
19 |
0.3 |
M |
13 |
|
|
|
Type 1 Dedicated Site |
|
GSH13 |
|
0.3 |
38 |
38 |
21 |
50 |
110 |
NA |
18 |
NA |
M |
13 |
|
|
|
Type 1 Dedicated Site |
|
GSH14 |
|
0.4 |
44 |
46 |
31 |
51 |
120 |
NA |
15 |
NA |
M |
14 |
|
|
|
Type 1 Dedicated Site |
|
GSH15 |
|
0.2 |
47 |
40 |
33 |
44 |
120 |
0.15 |
21 |
0.3 |
M |
14 |
|
|
|
Type 1 Dedicated Site |
|
GV16 |
|
0.2 |
57 |
57 |
39 |
49 |
147 |
0.17 |
23 |
0.4 |
M |
15 |
|
|
|
Type 1 Dedicated Site |
|
GV16 |
0.00-1.00m |
0.2 |
50 |
32 |
36 |
51 |
100 |
NA |
16 |
NA |
M |
15 |
|
|
|
Type 1 Dedicated Site |
|
GV16 |
1.00-2.00m |
0.1 |
35 |
12 |
20 |
35 |
69 |
NA |
12 |
NA |
L |
|
|
|
|
Type 1 |
|
GV16 |
2.00-3.00m |
0.1 |
29 |
9.5 |
16 |
200 |
54 |
NA |
8.2 |
NA |
H |
|
|
|
|
Type 2 |
|
GV16 |
3.00-4.00m |
0.1 |
36 |
15 |
27 |
29 |
75 |
NA |
10 |
NA |
L |
|
|
|
|
Type 1 |
|
GV16 |
4.00-5.00m |
0.1 |
43 |
15 |
30 |
48 |
79 |
NA |
8.5 |
NA |
M |
16 |
|
x |
|
Type 2 |
|
GV17 |
|
<0.2 |
39 |
32 |
26 |
34 |
99 |
0.18 |
17 |
0.2 |
M |
17 |
x |
x |
|
Type 2 |
|
GV17 |
0.70-0.90m |
0.2 |
31 |
26 |
19 |
35 |
85 |
NA |
14 |
NA |
M |
17 |
x |
x |
|
Type 2 |
|
GV17 |
0.90-1.90m |
0.1 |
32 |
22 |
19 |
31 |
66 |
NA |
13 |
NA |
M |
17 |
x |
x |
|
Type 2 |
|
GV17 |
1.90-2.90m |
0.1 |
26 |
14 |
16 |
28 |
58 |
NA |
11 |
NA |
L |
17 |
x |
x |
|
Type 2 |
|
GV17 |
2.90-4.00m |
<0.1 |
24 |
14 |
16 |
29 |
62 |
NA |
9.5 |
NA |
L |
17 |
x |
x |
|
Type 2 |
|
GV17 |
4.00-5.00m |
<0.1 |
24 |
10 |
18 |
25 |
63 |
NA |
5.3 |
NA |
L |
17 |
x |
x |
|
Type 2 |
|
GV18 |
|
<0.2 |
38 |
29 |
25 |
34 |
94 |
0.14 |
18 |
0.2 |
M |
18 |
x |
x |
|
Type 2 |
|
GV18 |
0.35-0.90m |
0.2 |
36 |
25 |
21 |
38 |
81 |
NA |
16 |
NA |
M |
18 |
x |
x |
|
Type 2 |
|
GV18 |
0.90-1.90m |
0.1 |
37 |
23 |
21 |
39 |
76 |
NA |
17 |
NA |
M |
18 |
x |
x |
|
Type 2 |
|
GV18 |
1.90-2.90m |
0.1 |
34 |
20 |
19 |
36 |
67 |
NA |
14 |
NA |
M |
18 |
x |
x |
|
Type 2 |
|
GV18 |
2.90-4.00m |
0.3 |
50 |
43 |
29 |
31 |
83 |
NA |
17 |
NA |
M |
18 |
x |
x |
|
Type 2 |
|
GV18 |
4.00-5.00m |
<0.1 |
26 |
12 |
16 |
28 |
56 |
NA |
10 |
NA |
L |
19 |
x |
x |
x |
Type 2 |
|
GV19 |
|
<0.2 |
39 |
32 |
25 |
34 |
96 |
0.15 |
17 |
0.2 |
M |
20 |
|
|
|
Type 1 Dedicated Site |
|
GV19 |
0.25-0.90m |
0.2 |
33 |
25 |
20 |
32 |
79 |
NA |
13 |
NA |
M |
20 |
|
|
|
Type 1 Dedicated Site |
|
GV19 |
0.90-1.90m |
0.1 |
38 |
26 |
21 |
39 |
73 |
NA |
18 |
NA |
M |
20 |
|
|
|
Type 1 Dedicated Site |
|
GV19 |
1.90-2.90m |
0.1 |
37 |
22 |
21 |
39 |
74 |
NA |
16 |
NA |
M |
20 |
|
|
|
Type 1 Dedicated Site |
|
GV19 |
2.90-4.00m |
0.1 |
33 |
20 |
19 |
30 |
61 |
NA |
12 |
NA |
L |
20 |
|
|
|
Type 1 |
|
GV19 |
4.00-5.00m |
0.1 |
27 |
15 |
16 |
24 |
57 |
NA |
9.4 |
NA |
L |
20 |
|
|
|
Type 1 |
|
GSH35 |
|
<0.2 |
47 |
40 |
31 |
40 |
116 |
0.26 |
21 |
0.3 |
M |
26 |
|
x |
|
Type 2 |
|
GSH36 |
|
0.3 |
37 |
34 |
27 |
42 |
100 |
NA |
15 |
NA |
M |
26 |
|
x |
|
Type 2 |
|
GSH37 |
|
0.2 |
40 |
34 |
25 |
43 |
94 |
NA |
18 |
NA |
M |
26 |
|
x |
|
Type 2 |
|
GSH38 |
|
0.2 |
40 |
32 |
24 |
44 |
91 |
NA |
18 |
NA |
M |
26 |
|
x |
|
Type 2 |
|
GSH20 |
|
0.2 |
27 |
21 |
18 |
32 |
80 |
NA |
13 |
NA |
M |
21 |
|
|
|
Type 1 Dedicated Site |
|
GSH21 |
|
<0.2 |
44 |
34 |
29 |
39 |
106 |
0.13 |
21 |
0.2 |
M |
21 |
|
|
|
Type 1 Dedicated Site |
|
CP18 |
0.00-0.90m |
0.1 |
35 |
31 |
24 |
35 |
78 |
NA |
17 |
NA |
M |
22 |
|
|
|
Type 1 Dedicated Site |
|
CP18 |
0.90-1.90m |
0.1 |
31 |
21 |
21 |
32 |
71 |
NA |
12 |
NA |
L |
|
|
|
|
Type 1 |
|
CP18 |
1.90-2.90m |
0.1 |
33 |
24 |
22 |
34 |
73 |
NA |
14 |
NA |
M |
22 |
|
|
|
Type 1 Dedicated Site |
|
CP18 |
2.90-4.00m |
0.1 |
34 |
26 |
23 |
31 |
73 |
NA |
15 |
NA |
M |
22 |
|
|
|
Type 1 Dedicated Site |
|
CP18 |
4.00-5.00m |
0.1 |
32 |
23 |
22 |
30 |
72 |
NA |
13 |
NA |
M |
22 |
|
|
|
Type 1 Dedicated Site |
|
DC22 |
0.00-0.90m |
0.1 |
33 |
27 |
21 |
36 |
72 |
NA |
15 |
NA |
M |
23 |
|
|
|
Type 1 Dedicated Site |
|
DC22 |
0.90-1.90m |
<0.1 |
30 |
22 |
21 |
33 |
72 |
NA |
12 |
NA |
L |
|
|
|
|
Type 1 |
|
DC22 |
1.90-2.90m |
0.2 |
36 |
32 |
24 |
37 |
78 |
NA |
16 |
NA |
M |
23 |
|
|
|
Type 1 Dedicated Site |
|
DC22 |
2.90-4.00m |
0.1 |
31 |
20 |
22 |
32 |
72 |
NA |
12 |
NA |
L |
|
|
|
|
Type 1 |
|
DC22 |
4.00-5.00m |
<0.1 |
29 |
15 |
22 |
30 |
74 |
NA |
9.7 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH39 |
|
0.2 |
34 |
24 |
23 |
37 |
75 |
NA |
13 |
NA |
M |
27 |
|
x |
|
Type 2 |
|
GSH40 |
|
0.1 |
31 |
18 |
18 |
32 |
62 |
NA |
13 |
NA |
M |
27 |
|
x |
|
Type 2 |
|
GSH22 |
|
0.1 |
23 |
14 |
15 |
29 |
57 |
NA |
7.3 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH41 |
|
<0.1 |
16 |
8.5 |
10 |
29 |
44 |
NA |
5.9 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH42 |
|
<0.1 |
15 |
7.5 |
10 |
20 |
45 |
NA |
5.3 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH23 |
|
<0.2 |
22 |
12 |
14 |
21 |
62 |
0.06 |
7 |
<0.1 |
L |
|
|
|
|
Type 1 |
|
GSH24 |
|
0.2 |
31 |
20 |
20 |
35 |
78 |
NA |
10 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH25 |
|
0.2 |
36 |
25 |
24 |
42 |
93 |
NA |
10 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH26 |
|
0.1 |
21 |
11 |
13 |
25 |
74 |
NA |
6.7 |
NA |
L |
|
|
|
|
Type 1 |
|
GV43 |
|
0.1 |
15 |
8.0 |
9.9 |
21 |
38 |
NA |
5 |
NA |
L |
|
|
|
|
Type 1 |
|
GV43 |
0.18-0.90m |
<0.1 |
10 |
5 |
<1 |
15 |
27 |
NA |
4.7 |
NA |
L |
|
|
|
|
Type 1 |
|
GV43 |
0.90-1.90m |
0.1 |
9.6 |
4.3 |
<1 |
14 |
25 |
NA |
5.2 |
NA |
L |
|
|
|
|
Type 1 |
|
GV43 |
1.90-2.90m |
0.1 |
5.2 |
3.2 |
<1 |
13 |
22 |
NA |
3.8 |
NA |
L |
|
|
|
|
Type 1 |
|
GV43 |
2.90-4.00m |
<0.1 |
8.7 |
3.4 |
<1 |
12 |
24 |
NA |
3.4 |
NA |
L |
|
|
|
|
Type 1 |
|
GV43 |
4.00-5.00m |
0.1 |
7.3 |
4.2 |
<1 |
15 |
27 |
NA |
4.3 |
NA |
L |
|
|
|
|
Type 1 |
|
GV43 |
5.00-6.00m |
<0.1 |
6.6 |
3.4 |
<1 |
14 |
24 |
NA |
3.2 |
NA |
L |
|
|
|
|
Type 1 |
|
GV44 |
|
<0.2 |
13 |
6 |
2 |
16 |
31 |
<0.05 |
6 |
<0.1 |
L |
|
|
|
|
Type 1 |
|
GV44 |
0.05-0.90m |
0.1 |
7.8 |
6.9 |
<1 |
17 |
25 |
NA |
3.5 |
NA |
L |
|
|
|
|
Type 1 |
|
GV44 |
0.90-1.90m |
0.1 |
9.6 |
4.8 |
<1 |
12 |
22 |
NA |
2.7 |
NA |
L |
|
|
|
|
Type 1 |
|
GV44 |
1.90-2.90m |
<0.1 |
2.2 |
2.4 |
<1 |
9.9 |
15 |
NA |
1.4 |
NA |
L |
|
|
|
|
Type 1 |
|
GV44 |
2.90-3.20m |
<0.1 |
2.4 |
2.4 |
<1 |
12 |
16 |
NA |
2.9 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH27 |
|
0.2 |
27 |
16 |
17 |
31 |
66 |
NA |
9 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH28 |
|
0.2 |
24 |
15 |
16 |
29 |
61 |
NA |
9.2 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH29 |
|
0.2 |
32 |
21 |
20 |
38 |
77 |
NA |
10 |
NA |
L |
|
|
|
|
Type 1 |
|
GV30 |
|
<0.2 |
38 |
26 |
25 |
33 |
91 |
0.13 |
16 |
0.2 |
M |
25 |
|
x |
|
Type 2 |
|
GV30 |
0.00-0.90m |
0.1 |
24 |
12 |
3.5 |
30 |
51 |
NA |
10 |
NA |
L |
|
|
|
|
Type 1 |
|
GV30 |
0.90-1.50m |
<0.1 |
11 |
4.4 |
<1 |
21 |
35 |
NA |
4.2 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH31 |
|
<0.2 |
33 |
21 |
21 |
28 |
79 |
0.09 |
14 |
0.1 |
M |
25 |
|
x |
|
Type 2 |
|
GSH32 |
|
0.2 |
29 |
21 |
19 |
33 |
72 |
NA |
11 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH33 |
|
0.1 |
27 |
15 |
16 |
29 |
62 |
NA |
9.1 |
NA |
L |
|
|
|
|
Type 1 |
|
GSH45 |
|
<0.2 |
24 |
14 |
16 |
25 |
64 |
0.06 |
9 |
0.1 |
L |
|
|
|
|
Type 1 |
|
GV34 |
|
<0.1 |
18 |
9.5 |
11 |
23 |
53 |
NA |
7 |
NA |
L |
|
|
|
|
Type 1 |
|
GV34 |
0.00-0.90m |
0.1 |
15 |
10 |
<1 |
25 |
43 |
NA |
10 |
NA |
L |
|
|
|
|
Type 1 |
|
GV34 |
0.90-1.90m |
<0.1 |
16 |
5.6 |
<1 |
18 |
39 |
NA |
6.4 |
NA |
L |
|
|
|
|
Type 1 |
|
GV34 |
1.90-2.90m |
0.2 |
23 |
11 |
<1 |
28 |
53 |
NA |
10 |
NA |
L |
|
|
|
|
Type 1 |
|
GV34 |
2.90-4.00m |
0.1 |
9.2 |
4.2 |
<1 |
16 |
21 |
NA |
12 |
NA |
L |
|
|
|
|
Type 1 |
|
GV34 |
4.00-4.50m |
0.1 |
<1 |
1 |
<1 |
7.6 |
<10 |
NA |
4.6 |
NA |
L |
|
|
|
|
Type 1 |
|
Notes: (a) NA = Results not available, not
tested. (b) Mercury and silver chemical testing
results were not available for a number of samples due to laboratory
equipment error occurred during the metal analysis. 17 additional grab samples (GV6, GSH8,
GSH9, GSH11, GSH12, GSH15, GV16, GV17, GV18, GV19, GSH21, GSH23, GV30, GSH31,
GSH35, GV44 and GSH45) were subsequently undertaken for metal and metalloid
analysis (Cd, Cr, Cu, Ni, Pb,
Zn, Hg, As, Ag, CN) to supplement the missing data and the metals and
metalloid analytical results are presented in the table. (c) Bold = Exceeding LCEL, classified as Category M, which requires biological
screening to determine the types of disposal site (ie
Type 1 or Type 2 Disposal). (d) Bold and underlined = Exceeding UCEL, classified
as Category H, Type 3 Disposal. (e) x = Failed biological testing. (f) Type 1 Disposal = disposal at an open sea disposal. (g) Type 1 Dedicated Site = disposal at a dedicated open sea disposal
site. (h) Type 2 Disposal = disposal at confined marine disposal site. (i) Type 3 Disposal = Special treatment / confined marine disposal site. |
|||||||||||||||||
Sample Reference |
Total PCBs (ug kg-1) |
Total PAHs (Low MW) (ug
kg-1) |
Total PAHs (High MW) (ug
kg-1) |
TBT in Interstitial Water (ug L-1) |
Chlorinated Pesticides (ug kg-1) |
|||||||||||||
Drillhole No. |
Depth (m) From-To |
|||||||||||||||||
Alpha BHC |
Beta BHC |
Gamma BHC |
Delta-BHC |
Hepta-chlor |
Aldrin |
Heptachlor epoxide |
Endosulfan 1 |
p, p'-DDT |
p, p'-DDD |
p, p'-DDE |
Endosulfan sulfate |
|||||||
Reporting Limits |
2 |
550 |
1700 |
0.015 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
||
LCEL |
23 |
550 |
1700 |
23 |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
||
UCEL |
180 |
3160 |
9600 |
180 |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
||
GSH6 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH7 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH8 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP11 |
0.43-0.90m |
2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP11 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP11 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP11 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP11 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH9 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC2 |
0.42-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC2 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC2 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC2 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC2 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH10 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH11 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH12 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH13 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH14 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH15 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV16 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV16 |
0.00-1.00m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV16 |
1.00-2.00m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV16 |
2.00-3.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV16 |
3.00-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV16 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV17 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV17 |
0.70-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV17 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV17 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV17 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV17 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV18 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV18 |
0.35-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV18 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV18 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV18 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV18 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV19 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV19 |
0.25-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV19 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV19 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV19 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV19 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH35 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH36 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH37 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH38 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH20 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP18 |
0.00-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP18 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP18 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP18 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
CP18 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH21 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC22 |
0.00-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC22 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC22 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC22 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
DC22 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH39 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH40 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH22 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH41 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH42 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH23 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH24 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH25 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH26 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV43 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV43 |
0.18-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV43 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV43 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV43 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV43 |
4.00-5.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV43 |
5.00-6.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV44 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV44 |
0.05-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV44 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV44 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV44 |
2.90-3.20m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH27 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH28 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH29 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV30 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV30 |
0.00-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV30 |
0.90-1.50m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH31 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH32 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH33 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GSH45 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV34 |
|
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV34 |
0.00-0.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV34 |
0.90-1.90m |
<2 |
<550 |
<1700 |
<0.015 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV34 |
1.90-2.90m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV34 |
2.90-4.00m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
GV34 |
4.00-4.50m |
<2 |
<550 |
<1700 |
NA |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
Note: (a)
NA = Results not available, not tested. |
Sample Reference |
Redox Potential |
TOCb, c |
TOCb |
TKNd |
Nitrate |
Nitrite |
Ammoniacal Nitrogen |
Ortho-Phosphate |
Total Phosphorous |
|
Drillhole No. |
Depth (m) From-To |
mV |
% |
% |
mg-N/kg |
mg-N/kg |
mg-N/kg |
mg-NH4-N/kg |
mg-P/kg |
mg-P/kg |
Reporting Limits |
|
1 |
0.1 |
|
50 |
1 |
1 |
1 |
1 |
|
LCEL |
|
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
UCEL |
|
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
NA |
GSH6 |
|
430 |
0.35 |
NA |
1600 |
13 |
<1 |
6.1 |
2.4 |
700 |
GSH7 |
|
440 |
0.45 |
0.81 |
2600 |
<1 |
1.2 |
10 |
1.8 |
540 |
GSH8 |
|
480 |
0.40 |
0.86 |
2000 |
<1 |
1.3 |
7.8 |
3.2 |
940 |
CP11 |
0.43-0.90m |
410 |
0.35 |
0.62 |
200 |
<1 |
<1 |
2.4 |
1.1 |
290 |
CP11 |
0.90-1.90m |
390 |
0.30 |
0.54 |
450 |
<1 |
1.5 |
50 |
2.2 |
580 |
CP11 |
1.90-2.90m |
410 |
0.50 |
0.99 |
1100 |
20 |
1.7 |
120 |
1.5 |
780 |
CP11 |
2.90-4.00m |
400 |
0.40 |
0.69 |
780 |
16 |
2.0 |
85 |
1.0 |
260 |
CP11 |
4.00-5.00m |
400 |
0.40 |
0.70 |
810 |
<1 |
<1 |
88 |
1.2 |
300 |
GSH9 |
|
440 |
0.45 |
0.84 |
1000 |
<1 |
1.2 |
4.1 |
1.2 |
360 |
DC2 |
0.42-0.90m |
410 |
0.45 |
0.86 |
430 |
2.1 |
1.5 |
52 |
2.6 |
400 |
DC2 |
0.90-1.90m |
390 |
0.50 |
1.1 |
810 |
1.5 |
1.2 |
98 |
1.5 |
230 |
DC2 |
1.90-2.90m |
420 |
0.55 |
1.1 |
750 |
1.6 |
<1 |
89 |
1.1 |
160 |
DC2 |
2.90-4.00m |
400 |
0.50 |
0.97 |
900 |
1.1 |
<1 |
110 |
4.0 |
620 |
DC2 |
4.00-5.00m |
420 |
0.45 |
0.83 |
800 |
18 |
5.0 |
96 |
1.5 |
870 |
GSH10 |
|
420 |
0.35 |
0.72 |
760 |
<1 |
<1 |
3.0 |
1.7 |
520 |
GSH11 |
|
410 |
0.35 |
0.63 |
690 |
1.7 |
<1 |
2.8 |
1.5 |
470 |
GSH12 |
|
450 |
0.40 |
0.71 |
700 |
4.2 |
1.0 |
2.8 |
1.2 |
360 |
GSH13 |
|
420 |
0.40 |
0.81 |
760 |
<1 |
<1 |
3.0 |
1.1 |
340 |
GSH14 |
|
420 |
0.35 |
0.72 |
620 |
0.43 |
0.68 |
2.5 |
1.6 |
630 |
GSH15 |
|
420 |
0.50 |
1.13 |
910 |
1.2 |
<1 |
3.6 |
2.2 |
790 |
GV16 |
|
400 |
0.30 |
0.58 |
650 |
<1 |
<1 |
2.6 |
2.4 |
710 |
GV16 |
0.00-1.00m |
390 |
0.35 |
0.60 |
390 |
11 |
2.5 |
19 |
1.4 |
410 |
GV16 |
1.00-2.00m |
420 |
0.45 |
0.68 |
650 |
<1 |
<1 |
5.2 |
<1 |
260 |
GV16 |
2.00-3.00m |
390 |
0.45 |
0.74 |
1900 |
<1 |
<1 |
7.9 |
1.3 |
390 |
GV16 |
3.00-4.00m |
370 |
0.25 |
0.44 |
1700 |
<1 |
<1 |
8.9 |
1.2 |
350 |
GV16 |
4.00-5.00m |
440 |
0.50 |
1.15 |
800 |
<1 |
<1 |
3.2 |
1.5 |
560 |
GV17 |
|
410 |
0.50 |
0.81 |
100 |
<1 |
<1 |
3.4 |
1.0 |
310 |
GV17 |
0.70-0.90m |
400 |
0.35 |
0.59 |
330 |
<1 |
<1 |
11 |
2.3 |
720 |
GV17 |
0.90-1.90m |
420 |
0.40 |
0.77 |
670 |
1.1 |
<1 |
2.6 |
2.0 |
740 |
GV17 |
1.90-2.90m |
400 |
0.40 |
0.61 |
430 |
11 |
1.5 |
14 |
1.7 |
540 |
GV17 |
2.90-4.00m |
370 |
0.40 |
0.63 |
420 |
<1 |
<1 |
14 |
1.6 |
440 |
GV17 |
4.00-5.00m |
370 |
0.40 |
0.62 |
370 |
<1 |
1.0 |
12 |
1.4 |
380 |
GV18 |
|
390 |
0.45 |
0.77 |
100 |
<1 |
<1 |
3.4 |
1.8 |
580 |
GV18 |
0.35-0.90m |
390 |
0.50 |
0.88 |
580 |
1.5 |
<1 |
19 |
2.3 |
730 |
GV18 |
0.90-1.90m |
370 |
0.35 |
0.59 |
850 |
<1 |
<1 |
28 |
2.0 |
640 |
GV18 |
1.90-2.90m |
380 |
0.45 |
0.77 |
1400 |
<1 |
<1 |
46 |
2.3 |
710 |
GV18 |
2.90-4.00m |
370 |
0.40 |
0.61 |
830 |
16 |
<1 |
28 |
1.9 |
600 |
GV18 |
4.00-5.00m |
400 |
0.50 |
0.88 |
630 |
1.2 |
<1 |
2.5 |
1.6 |
650 |
GV19 |
|
400 |
0.45 |
0.74 |
70 |
<1 |
<1 |
2.3 |
2.2 |
700 |
GV19 |
0.25-0.90m |
380 |
0.40 |
0.70 |
900 |
<1 |
1.5 |
30 |
1.6 |
530 |
GV19 |
0.90-1.90m |
380 |
0.35 |
0.59 |
930 |
1.2 |
<1 |
31 |
1.8 |
570 |
GV19 |
1.90-2.90m |
370 |
0.35 |
0.53 |
1100 |
<1 |
<1 |
36 |
2.4 |
2000 |
GV19 |
2.90-4.00m |
360 |
0.30 |
0.45 |
960 |
<1 |
<1 |
32 |
2.0 |
620 |
GV19 |
4.00-5.00m |
400 |
0.45 |
0.76 |
700 |
4.4 |
<1 |
2.8 |
1.5 |
620 |
GSH35 |
|
403 |
0.35 |
0.71 |
740 |
<1 |
<1 |
2.9 |
1.8 |
740 |
GSH36 |
|
410 |
0.40 |
0.87 |
1000 |
<1 |
<1 |
3.9 |
2.1 |
850 |
GSH37 |
|
420 |
0.45 |
0.93 |
740 |
1.3 |
<1 |
2.9 |
1.9 |
770 |
GSH38 |
|
400 |
0.45 |
0.94 |
2100 |
<1 |
<1 |
8.5 |
1.9 |
710 |
GSH20 |
|
420 |
0.50 |
0.82 |
580 |
<1 |
<1 |
2.4 |
2.0 |
230 |
GSH21 |
|
420 |
0.35 |
0.65 |
720 |
<1 |
<1 |
2.8 |
2.4 |
410 |
CP18 |
0.00-0.90m |
380 |
0.40 |
0.68 |
340 |
12 |
3.7 |
31 |
<1 |
250 |
CP18 |
0.90-1.90m |
380 |
0.40 |
0.67 |
870 |
14 |
1.6 |
78 |
<1 |
190 |
CP18 |
1.90-2.90m |
390 |
0.35 |
0.60 |
840 |
<1 |
<1 |
75 |
<1 |
120 |
CP18 |
2.90-4.00m |
370 |
0.30 |
0.52 |
1100 |
<1 |
<1 |
100 |
1.4 |
370 |
CP18 |
4.00-5.00m |
390 |
0.35 |
0.55 |
850 |
<1 |
<1 |
75 |
2.0 |
540 |
DC22 |
0.00-0.90m |
380 |
0.30 |
0.51 |
370 |
14 |
2.8 |
33 |
1.0 |
260 |
DC22 |
0.90-1.90m |
390 |
0.40 |
0.68 |
660 |
<1 |
<1 |
59 |
1.3 |
340 |
DC22 |
1.90-2.90m |
360 |
0.30 |
0.51 |
150 |
<1 |
<1 |
69 |
1.5 |
420 |
DC22 |
2.90-4.00m |
360 |
0.35 |
0.59 |
550 |
2.1 |
3.2 |
66 |
2.1 |
570 |
DC22 |
4.00-5.00m |
370 |
0.30 |
0.48 |
600 |
4.8 |
1.2 |
54 |
2.0 |
550 |
GSH39 |
|
410 |
0.25 |
0.43 |
730 |
<1 |
<1 |
2.8 |
2.9 |
510 |
GSH40 |
|
400 |
0.35 |
0.55 |
540 |
<1 |
<1 |
2.1 |
1.2 |
220 |
GSH22 |
|
400 |
0.30 |
0.43 |
500 |
8.5 |
<1 |
2.0 |
1.9 |
340 |
GSH41 |
|
400 |
0.25 |
0.35 |
470 |
5.4 |
8.2 |
1.8 |
1.7 |
300 |
GSH42 |
|
400 |
0.15 |
0.22 |
900 |
<1 |
<1 |
3.5 |
14 |
180 |
GSH23 |
|
400 |
0.20 |
0.29 |
490 |
<1 |
<1 |
1.9 |
1.5 |
390 |
GSH24 |
|
410 |
0.35 |
0.62 |
770 |
1.1 |
<1 |
2.8 |
2.0 |
360 |
GSH25 |
|
420 |
0.40 |
0.79 |
1300 |
<1 |
1.2 |
5.0 |
2.2 |
380 |
GSH26 |
|
410 |
0.35 |
0.52 |
860 |
9.5 |
<1 |
3.4 |
1.8 |
320 |
GV43 |
|
380 |
0.20 |
0.26 |
<50 |
<1 |
<1 |
1.3 |
1.1 |
180 |
GV43 |
0.18-0.90m |
370 |
0.10 |
0.13 |
<50 |
<1 |
<1 |
1.3 |
5.4 |
880 |
GV43 |
0.90-1.90m |
370 |
0.20 |
0.27 |
65 |
<1 |
<1 |
1.3 |
3.8 |
610 |
GV43 |
1.90-2.90m |
360 |
0.15 |
0.20 |
83 |
<1 |
<1 |
1.6 |
9.5 |
1700 |
GV43 |
2.90-4.00m |
360 |
0.10 |
0.14 |
150 |
<1 |
<1 |
3.1 |
4.2 |
670 |
GV43 |
4.00-5.00m |
370 |
0.05 |
0.07 |
170 |
<1 |
<1 |
3.4 |
5.3 |
870 |
GV43 |
5.00-6.00m |
440 |
0.20 |
0.29 |
680 |
<1 |
<1 |
2.7 |
1.8 |
360 |
GV44 |
|
370 |
<0.05 |
<0.05 |
130 |
<1 |
<1 |
2.7 |
3.7 |
610 |
GV44 |
0.05-0.90m |
370 |
0.10 |
0.14 |
80 |
<1 |
<1 |
1.6 |
2.4 |
400 |
GV44 |
0.90-1.90m |
370 |
0.05 |
0.07 |
92 |
<1 |
<1 |
1.9 |
3.0 |
480 |
GV44 |
1.90-2.90m |
380 |
0.75 |
1.04 |
610 |
4.2 |
<1 |
2.4 |
2.6 |
450 |
GV44 |
2.90-3.20m |
360 |
<0.05 |
<0.05 |
54 |
<1 |
<1 |
1.1 |
3.1 |
520 |
GSH27 |
|
410 |
0.30 |
0.49 |
790 |
10 |
<1 |
3.1 |
1.6 |
240 |
GSH28 |
|
400 |
0.30 |
0.43 |
500 |
2.2 |
<1 |
2.0 |
1.7 |
380 |
GSH29 |
|
420 |
0.45 |
0.73 |
730 |
<1 |
<1 |
2.9 |
2.3 |
400 |
GV30 |
|
370 |
0.50 |
0.80 |
<50 |
<1 |
<1 |
24 |
25 |
4100 |
GV30 |
0.00-0.90m |
370 |
0.25 |
0.35 |
390 |
<1 |
<1 |
20 |
14 |
4000 |
GV30 |
0.90-1.50m |
420 |
0.40 |
0.79 |
1200 |
1.3 |
<1 |
4.6 |
2.1 |
380 |
GSH31 |
|
400 |
0.40 |
0.61 |
620 |
4.5 |
<1 |
2.4 |
1.2 |
220 |
GSH32 |
|
410 |
0.40 |
0.64 |
430 |
<1 |
<1 |
1.7 |
1.5 |
270 |
GSH33 |
|
400 |
0.30 |
0.47 |
590 |
<1 |
<1 |
2.3 |
2.6 |
420 |
GSH45 |
|
400 |
0.30 |
0.43 |
620 |
<1 |
<1 |
2.4 |
1.9 |
320 |
GV34 |
|
380 |
0.30 |
0.43 |
130 |
<1 |
<1 |
7.0 |
23 |
3800 |
GV34 |
0.00-0.90m |
370 |
0.25 |
0.34 |
<50 |
<1 |
<1 |
2.3 |
19 |
3200 |
GV34 |
0.90-1.90m |
380 |
0.50 |
0.81 |
55 |
<1 |
<1 |
2.9 |
7.8 |
1200 |
GV34 |
1.90-2.90m |
370 |
0.30 |
0.42 |
<50 |
<1 |
<1 |
2.0 |
15 |
2200 |
GV34 |
2.90-4.00m |
390 |
<0.05 |
<0.05 |
<50 |
<1 |
<1 |
1.6 |
3.2 |
510 |
GV34 |
4.00-4.50m |
400 |
0.25 |
0.38 |
740 |
<1 |
<1 |
2.9 |
2.0 |
360 |
Notes: (a)
NA = Results not available, not
tested. (b)
TOC = Total organic carbons. (c)
TOC are reported as wet weight. (d)
TKN = Total kjeldalh
nitrogen. |
Table 7.5 Estimated Quantities of Different Types
of Marine Sediment to be Dredged (Mm3)
Disposal Option |
Turning Basin & Approach Channel |
Seawall |
Berthing Trench |
Sea-Water Intake and Outfall |
Submarine Gas Pipeline |
Water & Power Supply Line |
Gas Receiving Station |
Total |
Type 1 Open Sea Disposal Site |
1.06 |
0.10 |
0.12 |
0.03 |
0.52 |
0.22 |
0.29 |
2.34 (60.1%) |
Type 1 Dedicated Open Sea Disposal Site |
- |
- |
- |
- |
0.95 |
- |
- |
0.95 (24.4%) |
Type 2 Confined Marine Disposal Site |
0.01 |
- |
- |
- |
0.59 |
- |
- |
0.60 (15.5%) |
Total |
1.07 |
0.10 |
0.12 |
0.03 |
2.06 |
0.22 |
0.29 |
3.89 (100%) |
Note: (a)
The quantity of
contaminated sediment was estimated based on locations where contamination
were found and sediment samples were classified as Category M or Category H
within the proposed dredged areas. The
estimate did not take into consideration the detail dredged profile or the
vertical distribution of contamination and the quantities presented in the
table above are considered primary and conservative. A detailed sampling, testing and estimation
of contaminated sediment will be carried out in accordance with the ETWBTC 34/2002 prior to the
commencement of the construction. |
The
dredging works for the seawall areas (approximately 0.10 Mm3) will
take about 45 days with approximately 6 barge trips per day (4). The dredging duration for the turning basin
and approach channel is estimated at around 93 days (1.07 Mm3) with
approximately 16 barge trips per day.
The programme for dredging for the submarine gas pipeline, berthing
trenches, water and power supply lines will be designed and the waste
generation rate and number of barges required will be estimated at the detailed
design stage of the Project.
The
dredged marine sediments will be loaded onto barges using closed grabs and
transported to the appropriate disposal sites depending on their level of
contamination. In accordance with the
requirements of ETWBTC No 34/2002,
the Categories M and H sediments will be dredged and transported with great
care in order to avoid leakage of contaminated sediment into the sea. With the implementation of the mitigation
measures recommended in Section 7.6.1, sediment disposal at the designated disposal sites will not
cause adverse environmental impacts.
The
testing results presented in this report are for EIA purposes only. The procedures detailed below will be followed
prior to obtaining a dumping license. A
proposal for sampling and chemical testing of the sediment will be prepared and
submitted to the EPD for approval. The
approved detailed sampling and chemical testing will be carried out prior to
the commencement of the dredging activities to confirm the sediment disposal
method. After carrying out the sampling
and testing, a Sediment Quality Report (SQR) will be prepared for EPD
approval as required under the Dumping at Sea Ordinance. The SQR will include the sampling details,
the chemical testing results, quality control records, proposed classification
and delineation of sediment according to the requirements of the Appendix A of ETWBTC 34/2002.
The
final disposal site will be determined by the Marine Fill Committee (MFC) and a
dumping licence will be obtained from the DEP prior to the commencement of the
dredging works.
The
potential water quality impacts due to the dredging and disposal of these
sediments have been assessed and are presented in Section 6, Water Quality Impact Assessment. The assessment concluded that the dredging
works and proper disposal of the sediment will meet the relevant water quality
impact assessment criteria in the EIAO-TM with the implementation of mitigation measures recommended in Section
6.
C&D
Materials
Land
will be excavated to provide a land for two LNG storage tanks on the southern
face of the existing slope on the north side of the island. The third LNG storage tank will be located on
the reclaimed area. Blasting will be
involved for the slope cutting with approximately 80% of the excavation being
rock. In addition, land will also be
excavated and filled within the hill on the opposite side to raise the land
level to approximately +10 mPD. The newly formed area will be primarily for siting the LNG terminal process area and the administration
buildings.
Formation
works would be required within the hill to the south of the above mentioned
site to connect the gas pipeline rack from the proposed LNG tanks to the jetty
area at the southeast side of South Soko.
Approximately
0.6 hectares of land will be reclaimed immediately to the west of the above
mentioned site using the excavated material generated from the site formation
work. The reclamation area will be
primarily used as berthing area for smaller sized vessels and platform area for
the proposed future third LNG storage tank.
The
management of C&D Materials can be divided into excavated materials (soil
and rock) and construction waste, which are described in the following
sections.
Excavated
Materials
Rock
and soil will be excavated from the site formation works and that will be
reused as fill material for the reclamation within the Project and as pipe
protection material (rock armour) for the submarine gas pipeline and utilities
as far as practicable. A rock crushing
plant will be provided to process excavated rock to the required size for
reuse. The quantities of
excavated/filling materials are presented in Table 7.6.
Table
7.6 Summary of Quantity of Excavated/Fill
Materials
Construction Works |
Rock |
|
Soil |
|
In-situ
Volume (m3) |
Period
|
In-situ
Volume (m3) |
Period
|
|
Excavation |
1,800,000 |
Mid 2008 – early 2009 |
560,000 |
Early 2008 – early 2009 |
Filling |
1,940,000 (a) |
Mid 2008 – mid 2009 |
381,000 (b) |
Early 2009 – late 2009 |
Surplus (+) /Deficit (-) |
- 140,000 |
Mid 2008 – mid 2009 |
+ 179,000 |
Early 2008 – late 2009 |
Notes: (a)
1,940,000 m3 of rock
fill comprise of 150,000 m3 of rock for seawall construction,
72,000 m3 of rock for seawater intake and outfall construction,
180,000 m3 of rock for placing the water and power supply line,
1,310,000 m3 of rock for submarine gas pipeline and 228,000 m3
of rock for construction of gas receiving station. (b)
381,000 m3 of fill
comprise 20,000 m3 of general fill for reclamation at South Soko Island, 270,000 m3 of fill for site
formation works and 91,000 m3 of general fill for reclamation at
the Gas Receiving Station. |
Excavated
Soil
Due
to limited space at the South Soko site, the
excavated soil (about 0.56 Mm3) will need to be initially removed
from site. It is intended that this
material will be returned to the site and be reused as fill for the site formation
works or within the reclamation. Several
possible stockpile sites, which can be accessed by barge, have been identified
and the availability of these sites is being investigated with the District
Land Office (DLO).
Another
alternative option is to reuse the excavated soil in other concurrent
construction projects either in Hong Kong or China. If all these options are not feasible, as a
last resort, the excavated soil will be delivered to the public fill reception
facilities such as Tuen Mun
Area 38 or other locations as agreed with CEDD.
Excavated
Rock
Due
to limited space at the site, all rock material (about 1.80 Mm3)
will need to be initially removed from site.
It is intended that the excavated rock be taken to a quarry in China for
processing and the processed rock will be subsequently reused within the
project for the submarine gas pipeline bedding works or within the
reclamation. However, this option of
sending the excavated rock to quarry in China will be subject to obtaining
approval from the PRC government for which further investigation will be
required.
Construction Waste
The
non-inert construction waste consisting of timber, paper, plastics and general
refuse (about 0.13 Mm3) (4) generated from site clearance works
cannot be reused and need to be disposed of at the West New Territories (WENT)
Landfill.
C&D Materials Arising from New
Building Construction
C&D
materials (consisting of waste concrete, packing materials, plastics, metal,
concrete, wood, etc) will also be generated from the new building
construction. The main structures
including its gross floor area (GFA) to be constructed at the site are
summarized in Table 7.9.
Table 7.9 GFA of Major New Buildings
New Building |
GFA (m2) |
Administration
building |
1,000 |
Control
room |
750 |
Maintenance
/ warehouse building |
800 |
Electrical
substation |
800 |
Gate
house |
50 |
Living
quarter and facility for 50 staff |
2,000 |
Total
GFA : |
5,400 |
Based
on a generation rate of 0.1 m3 per m2 of GFA constructed
(4), it is estimated that a total of about 540 m3 of C&D
materials will be generated. These
materials will be sorted on-site for public fill (inert portion) (about 432 m3)
and construction waste (68 m3) (5) in order to reduce the amount of
construction waste to be disposed of at landfills and the Project’s disposal
costs.
With
the proper implementation of good construction site practice and the mitigation
measures recommended in Sections 4, 5 and 6, the handling and transportation of C&D materials to the
disposal sites will not cause adverse dust, noise or water quality impacts.
Chemical
Wastes
Chemical
waste, as defined under the Waste
Disposal (Chemical Waste) (General) Regulation, includes any substance
being scrap material, or unwanted substances specified under Schedule 1 of the Regulation. A complete list
of such substances is provided under the Regulation;
however, substances likely to be generated from the construction of the LNG
terminal will, for the most part, arise from the maintenance of construction
plant and equipment. These may include,
but not limited to the following:
·
Scrap
batteries or spent acid/alkali from their maintenance;
·
Used
paint, engine oils, hydraulic fluids and waste fuel;
·
Spent
mineral oils/cleaning fluids from mechanical machinery; and
·
Spent
solvents/solutions from equipment cleaning activities.
Chemical
wastes may pose environmental, health and safety hazards if not stored and
disposed of in an appropriate manner as outlined in the Waste Disposal (Chemical Waste) (General) Regulation and the Code of Practice on the Packaging, Labelling
and Storage of Chemical Wastes.
These hazards may include:
·
Toxic
effects to workers;
·
Adverse
effects on air, water and land from spills; and
·
Fire
hazards.
The
amount of chemical waste that will arise from the construction activities will
be highly dependent on the Contractor’s on-site maintenance activities and the
quantity of plant and equipment utilized.
With respect to the nature of construction works and the number of
construction plant and equipment to be used on site, it is estimated that about
a few hundred litres of used lubricant oil will be generated per month during
the construction period. It is
anticipated that the quantities of waste solvent and wasted paint will be
minimal.
With
the incorporation of suitable arrangements for the storage, handling,
transportation and disposal of chemical wastes under the requirements stated in
the Code of Practice on the Packaging,
Labelling and Storage of Chemical Waste, no adverse environmental and
health impacts, and hazards will result from the handling, transportation and
disposal of chemical waste arising from the Project.
Sewage
Sewage
will arise from the construction workforce, site office’s sanitary facilities
and from portable toilets. If not
properly managed, these wastes could cause adverse water quality impacts, odour
and potential health risks to the workforce by attracting pests and other
disease vectors.
It
is conservatively assumed up to 1,600 construction workers will be working on
site at any one time during the construction of the LNG terminal. With a sewage generation rate of 0.15 m3
per worker per day (4), about 240 m3 of sewage will be generated per
day. The sewage generated will be either
conveyed to public sewage treatment works or treated on-site (see Section 6.6.7). If a small sewage treatment work (STW) will
be provided onsite, the sewage will be treated to the required effluent
discharge standards as stipulated in the Technical Memorandum on Standards
for Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal
Waters before discharging into sea.
Therefore, no adverse water quality impacts are envisaged. The wastewater discharge impacts have also
been discussed in Section 6. Since the site is remote and the plant will
be designed and operated to reduce odour and noise, adverse odour and noise
impacts from the STW are not expected.
About
0.26 m3 per day (at 30% dry solids) of dewatered sludge will be
generated from the operation of the on-site temporary STW. The dewatered sludge will be stored in
enclosed containers and transported by barge to the WENT Landfill for
disposal. Due to the small quantity of
sludge to be disposed of at landfill, it will not have adverse impacts to the
operation of the landfill.
Since
the STW will be enclosed and there is no ASR in the vicinity, potential odour
impact from the STW will be negligible.
General
Refuse
The
presence of a construction site with workers and associated site office will
result in the generation of general refuse (mainly consist of food waste,
aluminium cans and waste paper) which requires off-site disposal. The storage of general refuse has the
potential to give rise to adverse environmental impacts. These include odour if the waste is not
collected frequently (for example, daily), windblown litter, water quality
impacts if waste enters water bodies, and visual impact.
Assuming
up to 1,600 construction workers will be working on site at any one time, with
a general refuse generation rate of 0.65 kg per worker per day ([4]),
the amount of general refuse to be generated will be about 1,040 kg per day.
Recyclable
materials such as paper and aluminium cans will be separated and delivered to
the recyclers. Adequate number of waste
containers will be provided to avoid over-spillage of waste. The non-recyclable waste will be collected
and disposed of at the Cheung Chau or Mui Wo refuse transfer station on
a daily basis. With respect to the small
quantity of general refuse to be transferred via the Cheung Chau
or Mui Wan refuse transfer station or directly to the
WENT Landfill, it is not anticipated that it will cause adverse operational
impact to these facilities.
Provided
that the mitigation measures recommended in Section
7.6
are adopted, no adverse environmental impacts caused by the storage, handling,
transport and disposal of general refuse are expected.
7.5.2
Operational Phase
Dredged
Marine Sediment
As
the proposed Project area is located within the Pearl River Delta, it is
anticipated that some deposition of marine sediment will occur through out the
project period. In order to enable the
safe transit of the LNG carrier, maintenance dredging of the approach channel
and turning basin for the LNG carrier may be required on an infrequent
basis. It is anticipated that
approximately 1 to 2 cm of marine sediment deposition per year will occur in
the turning basin (please refer to Section
6). Based on this estimate,
maintenance dredging will be required at a minimum of once every ten years and
will be restricted to specific small areas.
Bathymetric surveys will be carried out to ascertain the volume of marine
sediment to be removed due to siltation.
Regarding
the sediment quality testing results at the turning basin and surrounding area
(summarized in Table 7.4), the
sediment within the turning basin is anticipated to be uncontaminated and could
be disposed at open sea disposal site.
However, a separate sediment quality testing would be conducted prior to
the maintenance dredging works to confirm the level of contamination and to
identify the disposal method. The
sediment quality testing would follow the requirement set out in the ETWBTC 34/2002. The final disposal site would be determined
by the MFC and a dumping licence will be obtained from the DEP prior to the
commencement of the maintenance dredging works.
Other
potential impact from the maintenance dredging activities, such as water quality
has been discussed in Section 6. Proposed mitigation measures, monitoring and
audit requirement have also been discussed in Section 6.
Industrial
Waste
Industrial
waste will arise from the maintenance activities at the LNG terminal. The materials may include scrap materials
from maintenance of plant and equipment and cleaning materials. Provided the scrap materials are collected
regularly for recycling, it is not expected that storage, handling, transport
and disposal of industrial waste will cause any adverse environmental
impacts. General industrial waste such
as plastic, metal cans and waste paper, will be collected together with the
general refuse disposed of at the refuse transfer station at Cheung Chau or Mui Wo
or directly to WENT Landfill.
Chemical
Waste
With
respect to the operation activities of the terminal, it is anticipated that
chemical waste will be generated from laboratory and maintenance activities at
the LNG terminal. The chemical wastes
include various chemical reagents, lubricants from air and BOG compressors,
firewater and potable water pumps, generators, and hydraulic loading arm
package. The quantity of laboratory
waste (including various used chemical reagents) and used lubricant oil to be
generated are estimated to be about 550 m3 and 1.5 m3 per
year, respectively (5). The chemical
waste will be collected by a licensed chemical waste collector for disposal at
the Chemical Waste Treatment Centre at Tsing Yi. The handling, storage, collection and
transportation of chemical waste will be undertaken in accordance with
requirement stated in the Code of
Practice on the Packaging, Labelling and Storage of Chemical Waste, and no
adverse environmental impacts and hazards are anticipated.
Sewage
Sewage
will arise from the operation staff and canteen facilities. Assuming up to 100 staff will be working
on-site and the sewage generated from sanitary system (about 6 m3
per day) and kitchen (about 29 m3 per day) will be approximately 35
m3 per day (6). A small
sewage treatment system will be provided on-site to treat the wastewater to the
required effluent discharge standards at stipulated in the Technical
Memorandum on Standards for Effluents Discharged into Drainage and Sewerage
Systems, Inland and Coastal Waters before discharging into sea. Therefore, no adverse water quality impacts
are envisaged. Since the site is remote
and the plant will be designed and operated to reduce odour and noise,
therefore, adverse odour and noise impacts from the sewage treatment system are
not expected.
About
0.02 m3 per day (at 30% dry solids) of dewatered sludge (7) will be
generated from the operation of the permanent on-site STW. The dewatered sludge will be transported in
enclosed containers and transported to the WENT Landfill for disposal. Due to the very small quantity of sludge to
be disposed of at landfill, it will not have any adverse operational effect to
the landfill.
General
Refuse
General
refuse will arise from the operation staff and administrative activities. General refuse may consist of food waste,
plastic, aluminium can and waste paper.
With a general refuse generation rate of 0.65 kg per worker per day (8),
the amount of general refuse to be generated will be about 65 kg per day.
Recyclable
materials (i.e. paper, plastic bottle and aluminium can) will be separated and
delivered to recyclers in order to reduce the amount of general refuse to be
disposed of at landfill. The
non-recyclable general refuse will be disposed of by barge to the refuse
transfer station at Cheung Chau or Mui Wo or directly to landfill on
a daily basis. With respect to the small
quantity of general refuse to be disposed of, no adverse environmental impact
associated with the handling and disposal of the refuse is anticipated.
7.6
Mitigation of
Adverse Impacts
This
section recommends the mitigation measures and good site practices to avoid or
reduce potential adverse environmental impacts associated with handling,
collection and disposal of waste arising from the construction and operation of
the proposed LNG terminal.
The
Contractors will incorporate these recommendations into a Waste Management Plan
for the construction works. The
Contractors will submit the plan to CAPCO’s Engineer
Representative for endorsement prior to the commencement of the construction
works. Such plan will incorporate
site-specific factors, such as the designation of areas for the segregation and
temporary storage of reusable and recyclable materials.
It
is the Contractor’s responsibility to ensure that only reputable licensed waste
collectors are used and that appropriate measures to reduce adverse impacts,
including windblown litter and dust from the transportation of these wastes,
are employed. In addition, the
Contractor must ensure that all the necessary permits or licences required
under the Waste Disposal Ordinance
are obtained for the construction and operational phases.
Waste
Management Hierarchy
The
various waste management options are categorised in terms of preference from an
environmental viewpoint. The options
considered to be most preferable have the least environmental impacts and are
more sustainable in the long term. The
hierarchy is as follows:
·
Avoidance
and reduction;
·
Reuse
of materials;
·
Recovery
and recycling; and,
·
Treatment
and disposal.
The
above hierarchy has been used to evaluate and select waste management
options. The aim has been to reduce
waste generation and reduce waste handling and disposal costs.
CAPCO
will ensure that their contractors consult the EPD for the final disposal of
wastes and as appropriate implement the good site practices and mitigation
measures recommended in this EIA Study and those given below.
·
Nomination
of approved personnel to be responsible for good site practices, arrangements for
collection and effective disposal to an appropriate facility of all wastes
generated at the site;
·
Training
of site personnel in proper waste management and chemical handling procedures;
·
Provision
of sufficient waste disposal points and regular collection for disposal;
·
Appropriate
measures to reduce windblown litter and dust transportation of waste by either
covering trucks or by transporting wastes in enclosed containers;
·
Separation
of chemical wastes for special handling and appropriate treatment at the
Chemical Waste Treatment Centre;
·
Regular
cleaning and maintenance programme for drainage systems, sumps and oil
interceptors; and
·
A
recording system for the amount of wastes generated/recycled and disposal
sites.
Waste
Reduction Measures
Good
management and control can prevent generation of significant amount of
waste. Waste reduction is best achieved
at the planning and design stage, as well as by ensuring the implementation of
good site practices. Recommendations to
achieve waste reduction include:
·
Segregation
and storage of different types of waste in different containers, skips or
stockpiles to enhance reuse or recycling of material and their proper disposal;
·
Encourage
collection of aluminium cans and waste paper by individual collectors during
construction with separate labelled bins provided to segregate these wastes
from other general refuse by the workforce;
·
Any
unused chemicals and those with remaining functional capacity be recycled as
far as possible;
·
Use of
reusable non-timber formwork to reduce the amount of C&D materials;
·
Prior
to disposal of C&D waste, wood, steel and other metals will be separated,
to the extent practical for re-use and/or recycling to reduce the quantity of
waste to be disposed in a landfill;
·
Proper
storage and site practices to reduce the potential for damage or contamination
of construction materials; and
·
Plan
and stock construction materials carefully to reduce amount of waste generated
and avoid unnecessary generation of waste.
7.6.1
Dredged Sediments
For sediments dredged during the construction of the LNG terminal, their
disposal will be as indicated in Section 7.5.1, and in accordance with
the requirements of the ETWBTC No 34/2002.
Detailed
sampling and chemical testing will be carried out prior to the commencement of
the dredging activities to confirm the sediment disposal method. The final disposal site will be determined by
the Marine Fill Committee (MFC) and a dumping licence will be obtained from EPD
prior to the commencement of the dredging works. Uncontaminated sediments will
be disposed of at open sea disposal sites designated by the MFC. For contaminated sediments requiring Type 2
confined marine disposal, CAPCO will ensure that the relevant contract
documents will specify the allocation conditions of the MFC and EPD.
7.6.2
Excavated Materials
Management
of Waste Disposal
The
contractor will open a billing account with EPD in accordance with the Waste Disposal (Charges for Disposal of
Construction Waste) Regulation for the payment of disposal charges. Every waste load transferred to Government
waste disposal facilities such as public fill, sorting facilities, landfills or
transfer station will require a valid “Chit” which contains the information of
the account holder to facilitate waste transaction recording and billing to the
waste producer. A trip-ticket system
will be established in accordance with ETWBTC
No. 31/2004 to monitor the reuse of surplus excavated materials off-site
and disposal of C&D waste and general refuse at transfer
stations/landfills, and to control fly-tipping.
The billing “chit” and trip-ticket system will be included as one of the
contractual requirements and implemented by the contractor. CAPCO will also conduct regular audits of the
waste management measures implemented on-site as described in the Waste
Management Plan.
A
recording system (similar to summary table as shown in Annex 5 and Annex 6 of
Appendix G of ETWBTC No. 19/2005) for
the amount of waste generated, recycled and disposed of (including the disposal
sites) will be established during the construction stage.
Measures
for the Reduction of C&D Materials Generation
Majority
of the inert C&D materials (rock and soil) will be reused within the
Project. Public fill and construction
waste shall be segregated and stored in different containers or skips to
facilitate reuse or recycling of the public fill and proper disposal of the
construction waste. Specific areas of
the work site will be designated for such segregation and storage if immediate
use is not practicable.
To
reduce the potential dust and water quality impacts of site formation works,
C&D materials will be wetted as quickly as possible to the extent practice
after excavation/filling.
7.6.3
Chemical Waste
Chemical
waste producers will be registered with the EPD.
Chemical
waste, as defined by Schedule 1 of
the Waste Disposal (Chemical Waste)
(General) Regulation, will be handled in accordance with the Code of Practice on the Packaging, Handling
and Storage of Chemical Wastes as follows.
Containers used for storage of chemical wastes will:
·
Be
suitable for the substance they are holding, resistant to corrosion, maintained
in a good condition, and securely closed;
·
Have
a capacity of less than 450 L unless the specifications have been approved by the
EPD; and
·
Display
a label in English and Chinese in accordance with instructions prescribed in Schedule 2 of the Regulations.
The
storage area for chemical wastes will:
·
Be
clearly labelled and used solely for the storage of chemical waste;
·
Be
enclosed on at least 3 sides;
·
Have
an impermeable floor and bunding, of capacity to
accommodate 110% of the volume of the largest container or 20% by volume of the
chemical waste stored in that area, whichever is the greatest;
·
Have
adequate ventilation;
·
Be
covered to prevent rainfall entering (water collected within the bund must be
tested and disposed of as chemical waste, if necessary); and
·
Be
arranged so that incompatible materials are appropriately separated.
Chemical
waste will be disposed of:
·
Via a
licensed waste collector; and
·
To a
facility licensed to receive chemical waste, such as the Chemical Waste
Treatment Facility which also offers a chemical waste collection service and
can supply the necessary storage containers.
7.6.4
Sewage
The
sewage generated from the construction workers will be treated by an on-site
sewage treatment work. The sludge will
be sent to the WENT Landfill by a licensed collector on a regular basis.
7.6.5
General Refuse
General
refuse will be stored in enclosed bins or compaction units separately from
construction and chemical wastes. A
reputable waste collector will be employed by the Contractor to remove general
refuse from the site, separately from construction and chemical wastes, on a
daily basis to reduce odour, pest and litter impacts. The burning of refuse on construction sites
is prohibited by law.
Recycling
bins will be provided at strategic locations to facilitate recovery of
aluminium can and waste paper from the site.
Materials recovered will be sold for recycling.
7.6.6
Industrial Wastes
Industrial
waste arising from maintenance activities will be segregated. It is recommended to send scrap metals for
recycling to reduce the overall quantity of waste disposed from these
activities.
7.6.7
Staff Training
Training
will be provided to workers on the concepts of site cleanliness and appropriate
waste management procedures, including waste reduction, reuse and recycling at
the beginning of the construction works.
7.7
Residual
Environmental Impacts
With
the implementation of the recommended mitigation measures, no adverse residual
impacts are anticipated from the construction and operation of the LNG
terminal.
7.8
Environmental
Monitoring and Audit Requirements
7.8.1
Construction Phase
To facilitate monitoring and control over the
contractors’ performance on waste management, a waste monitoring and audit
programme will be implemented throughout the construction phase. The aims of the monitoring and audit
programme are:
·
To
review the Contractor’s WMP including the quantities and types of C&D
materials generated, reused and disposed of off-site; the amount of fill
materials exported from/imported to the site and the quantity of timber used in
temporary works construction for each process/activity;
·
To
monitor the implementation and achievement of the WMP on site to assess its
effectiveness; and
·
To
monitor the follow-up action on deficiencies identified.
Joint
site audits by the CAPCO and the contractor will be undertaken on a weekly
basis. Particular attention will be
given to the contractor’s provision of sufficient spaces, adequacy of resources
and facilities for on-site sorting and temporary storage of C&D
materials. The C&D materials to be
disposed of from the site will be visually inspected. The public fill for delivery to the off-site
stockpiling area will contain no observable non-inert materials (e.g., general
refuse, timber, etc). Furthermore, the
waste to be disposed of at refuse transfer stations or landfills will as far as
possible contains no observable inert or reusable/recyclable C&D materials
(e.g., soil, broken rock, metal, and paper/cardboard packaging, etc). Any irregularities observed during the weekly
site audits will be raised promptly to the contractor for rectification.
To
facilitate assessment of the effectiveness of the waste management measures,
the WMP will state the performance targets to be achieved in reducing
generation of C&D materials taking account the site constraints. The performance targets will cover the
following items and will be agreed with the CAPCO at the beginning of the
contract.
·
The
percentage of excavated materials to be sorted to recover the soil and broken
rock for reuse on site or deliver to the off-site stockpiling area;
·
The
percentage of metal to be recovered for collection by recycling contractors;
and
·
The
percentage of cardboard and paper packaging (for plant, equipment and
materials) to be recovered. The
recovered materials will be properly stockpiled in dry and covered condition to
prevent cross contamination by other wastes.
The
findings of the waste audits will be reported in the Environmental
Monitoring and Audit Reports.
7.8.2
Operational Phase
As it is not expected that large quantities of waste will be generated
from the operation of the LNG terminal and no adverse environmental impacts
will arise with the implementation of good waste management practices, waste
monitoring and audit programme for the operational
phase of the LNG terminal will not be required.
7.9.1
Construction Phase
Optioneering
has been conducted to try to avoid waste generation and reuse and recycling of
waste generated from the construction of the terminal during the planning and
design stages and consideration of options for layout, construction methods and
programme, and the proposed scheme comprises the Applicants’ proposed best
balance. The key potential impacts
during the construction phase are related to wastes generated from site
clearance, site formation, blasting, dredging, reclamation, seawall
construction, filling and concreting.
It
is estimated that a total of approximate 3.89 Mm3 of marine sediment
will be dredged. It is estimated that
about 2.34 Mm3 of the sediments are uncontaminated and can be
disposed of at open sea disposal sites.
About 0.94 Mm3 of the Category M sediment (which passed the
biological screening) will be disposed of at dedicated open sea disposal
sites. The remaining 0.60 Mm3
of the Category M (which failed the biological screening) and Category H
sediments will have to be disposed of at the confined marine disposal
site. The final disposal site will be
subject to detailed sediment sampling, testing and analysis in accordance with
the ETWBTCW 34/2002 and disposal method reviewed prior to the
commencement of the dredging activities.
In addition, CAPCO will liaise with the MFC for the designated disposal
site and a dumping licence will be obtained from the DEP prior to the
commencement of the dredging work.
Approximately
0.13 Mm3 construction waste will be generated from the site clearance
works and will be disposed of at the WENT Landfill.
Approximately
0.56 Mm3 of excavated soil will need to be initially removed from
site. Suitable stockpiling sites are
currently being sought at this stage and if this is not possible, the excavated
soil will be reused in other concurrent construction projects either in Hong
Kong or China. If all these options are
not feasible, as the last resort the surplus excavated soil may have to be
disposed of at public fill reception facilities area at Tuen
Mun Area 38 or other locations as agreed with CEDD.
Due
to limited space on site, it is intended that all the excavated rock
(approximately 1.80 Mm3) generated from the site formation works
will be taken to a quarry in China for processing and subsequently reused
within the project.
The
construction programme is preliminary and subject to change, therefore, the
Contractor's programme will be reviewed by CAPCO when the construction
programme is finalized.
About
540 m3 of C&D materials will be generated during the
construction of new buildings. About few
hundred litres of used lubrication oil will be generated per month and a
maximum of 1,040 kg of general refuse will be generated each day. A small quantity of dewatered sludge (about
0.26 m3 per day) will be generated from the on-site sewage treatment
works. In view of the small quantity of
waste generated, the handling and disposal of the waste generated from
construction of new buildings, chemical wastes, general refuse and sludge to
licensed facilities will not cause adverse environmental impacts.
With
the implementation of the recommendations in Section 7.6, the potential environmental impacts arising from
storage, handling, collection, transport and disposal of wastes will meet the
criteria specified in the EIAO-TM. No adverse waste management impact is
anticipated. No residual and cumulative
environmental impacts and hazards associated with handling and disposal of
wastes arising from the construction of the LNG terminal proposed at South Soko are anticipated.
A
Waste Management Plan will be prepared by the Contractors and will be audited
through the environmental monitoring and auditing (EM&A) programme
recommended in Section 7.8 to
minimize the potential environmental impacts arising from waste management.
7.9.2
Operational Phase
With
good site practice, the potential environmental impacts associated with the
storage, handling, collection, transport and disposal of a small quantity of
industrial, general refuse, sewage and chemical wastes arising from the
operation of the LNG terminal proposed at South Soko
will meet the criteria specified in the EIAO-TM
and no adverse waste management impacts are anticipated.
Handling
of marine sediments resulting from infrequent (once every ten years)
maintenance dredging will be carried out in accordance with the ETWBTCW
34/2002 and disposal method reviewed prior to the commencement of the
dredging activities.
No
residual and cumulative environmental impacts and hazards associated with
handling and disposal of wastes arising from the operation of the LNG terminal
proposed at South Soko are anticipated.