APPENDIX K
CONTAMINATED LAND SITE SURVEY DETAILS
This appendix
lists lot numbers of sites and full desktop study results and the findings of
site visits to each site.
DD99/372 S.D. RP (Plates 7.1 - 7.5)
Landuse Survey - STT YLT-876C and STW YLW-627C currently being issued to the site to register it as container vehicle park. Also, YLW 625-PO and YLT 888-PO will be issued to the same lot to register use as container vehicle parking, open storage of containers and ancillary uses.
Site Inspection - Northern Section is a container/open storage area. (Plates 7.1 - 7.4) Many temporary buildings. Some petrol pumps and a chemical waste storage/disposal area. Site is roughly concreted or gravel surfaced. Spills and leakages of oil/petrol noted. Vehicle washing area. Maintenance areas. Drainage runs off into adjacent nullah/stream.
The southern section (Plate 7.5) of this Lot is a car parking area which has been concreted over fill material probably taken from the construction of the New Territories Circular Road.
Potential for Land Contamination - the waste oils and chemicals used at the northern area of the site have the potential to cause contamination. This is particularly the case where the ground surface is not fully concreted and leaching into the soil can occur. Around the chemical waste drain is an area of particular concern. Most contamination at this site is likely to be of oil origin and therefore hydrocarbons are the most likely contaminants. The southern area of Lot 372 is unlikely to be contaminated.
DD99/ 470 - 483, 486 - 493, 527, 545 - 548 (Plates 7.6 - 7.9)
Landuse Survey - District Lands Office were not able to supply any information
regarding this site
Site Inspection - Container storage, open storage and car repairs. Site is concreted in places and roughly surfaced with gravel in others. Many signs of oil spillage of varying degrees and much debris and waste strewn around the site. Pudding of water and oils is evident. Some storage of oils, lubricants, paints and solvents.
Potential for Land
Contamination - Chemicals and oils stored on site
have the potential to contaminate the land. The evidence of spillage suggests
that care is not being taken with their storage and handling, and the surface
type is such that infiltration of contaminants can occur easily. The majority
of contamination is likely to be hydrocarbons, although there could be some
heavy metals, especially where scrap metal has been dumped.
DD96/352, 353, 354, 355, 423 (Plates 7.10 and 7.11)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Sign at gate indicates that the site is a car repair workshop. Many chemical drums found in storage area at rear of site. Most containers were marked as flammable and/or harmful and included; Corilene F-326, concentrated resin, Camotex XR-5219, a white powder material and solvents reportedly used for leather. Some chemicals have been spilt, drums are dented.
Potential for Land Contamination - Chemicals marked as harmful are stored on site, these have the potential to contaminate land and indeed, appear to have done so already as the spillage shown in Plate 7.11 suggests. Hydrocarbons are likely to be the main contaminants.
DD96/427 (No Photo)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Site was covered with carpets carefully laid over ground and fenced in. This is probably used as a fruit growing area and the carpets are a means of collecting fruit.
Potential for Land Contamination - Contamination is unlikely but further site verification is necessary to confirm that the carpets are not hiding anything suspect.
DD96/ 428 (Plate 7.12)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Disused/abandoned pig farm, some storage of chemicals, oil drums and spillage around them. Access to the lot was not possible.
Potential for Land Contamination - Contamination may have occurred through a number of oil and petrol spills onto an uneven cracked surface - see Plate 7.12.
DD96/2250 (No Photo)
Landuse Survey - STT 1138 Storage of building materials and staff quarters, latrine, ancillary office - registered use since 1989.
Site Inspection - No access was allowed but sign indicated that the site was used as storage for a cargo company. Large painted metal containers could be seen though gates.
Potential for Land Contamination - Access to the site would be necessary to confirm if any chemicals, paints, solvents or lubricants are stored. The preliminary assessment suggests that the site is well maintained with a full concrete surface and therefore unless evidence of past spillage is found the site is considered unlikely to be contaminated.
DD 96/624 (No Photo)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Parking area for several trucks.
Potential for Land Contamination - Contamination unlikely.
DD 96/621 (Plates 7.13 and 7.14)
Landuse Survey - STT 885 site registered as a lard boiling factory since 1981.
Site Inspection - metal factory and storage area. Some storage of chemicals on site mainly oil drums. Site is mainly concreted .
Potential for Land Contamination - The site appeared to be well maintained but the activities which are carried out here are unknown. Metal workshops are listed under ProPECC PN 3/94 as an industry with the potential to cause contamination. The most likely contaminants are heavy metals and some lubricants.
DD 96/645 - sections (Plates 7.15 and 7.16)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Assorted farm buildings, some storage areas, some animal outhouses. Some storage of chemicals and livestock waste in drums. Generally untidy with rubbish strewn around area. Discarded tyres and assorted vehicle parts. Several parked vehicles in area including container lorries. Some of this falls into Government Land.
Potential for Land Contamination - An inventory of chemicals, pesticides etc. which may be used in the farming should be compiled. There is currently some potential for contamination to have occurred through waste spillage's but this is not considered to be significant.
DD 96/702 (No Photo)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Very securely fenced car scrap/dismantling and repairs yard. No access was allowed and very little could be seen through the fencing.
Potential for
Land Contamination - as no access was permitted it
is not possible to determine the likelihood of contamination, however, car
repair and dismantling workshops are listed in ProPECC PN 3/94 and an industry
with the potential to cause contamination. Car scrpa yards are known to
contaminate soils with metals such as cadmium, lead, coppr and zinc (Cairney,
1993).
DD 96/704, 705, 709, 716 (Plates 7.17 and 7.18)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Container lorries yard, some storage of old battered oil/chemical drums which appeared to be empty, ground is roughly surfaced with gravel and fill material.
Potential for Land Contamination - further investigation would be necessary to assess what was stored in the barrels and if any spillage's have occurred.
DD 96/698, 699
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Farm buildings. Some storage of chemicals and livestock feeds.
Potential for Land Contamination - Contamination unlikely but nature of chemicals and feed should be ascertained.
DD 96/717, 718, 721 (Plates 7.19 to 7.27)
Landuse Survey - District Lands Office were not able to supply any information regarding this site
Site Inspection - Roughly surfaced container site, concreted in some areas. Some storage areas and small offices. Few vehicles parked. Untidy areas of waste and debris and in the northern section are several clusters of chemical drums. Some of these drums may be outside the works area for the alignment but may have previously been stored elsewhere on site. They are battered, old, rusted and may have spilt contents through roughly surfaced and vegetated surface. Drums include Chlorowax, methylene chloride, chloro alkane solutions, epioxidised soybean oil and an acrylic solution. On one of the shed/offices is a sign taken from a drum saying marine pollutant. Many drums were marked Shell, BP and ICI. A site visit a week later confirmed that even more chemical drums had been left at this site including some containing chloroform.
Potential for Land Contamination - Initially it should be determined if the main area of chemical storage will be affected by the works. Potential for contamination of ground in this area is high given the nature of the ground surface which would be suitable for infiltration and knowing that several harmful chemicals are stored here. The drums are sometimes battered and therefore may have leaked. A contamination assessment should also determine whether the drums have been stored anywhere else on the site where they may have previously leaked. It should be noted that methylene chloride is listed as a hazardous air pollutant (under the US Clean Air Act, 1991), many chloro alkanes are designated as priority pollutants (Clean Water Act) or are on the Superfund Hazardous substances list, as is chloroform.
Government Land north of Po Lau Road (No Photos)
Landuse Survey - Includes Permit numbers T15321, T190, T5384, T13988, T10929, T18543, and T10273. The permits date back as far as 1957 for selected areas. Most of these government permits have been issued for cultivation and construction of temporary structures or dwellings. Some permits include the construction of agricultural stores, pig stys and chicken sheds.
Site Inspection - Several farms cover this government land area, mainly pig farms but it was not possible to gain access to them to observe what is held in their agricultural stores.
Potential for Land Contamination - Depending on the nature of supplies held in the agricultural stores, the potential for contamination is considered to be low.
DD95/ 786, 791, 792, 772 (part) (Plate 7.28)
Landuse Survey - A planning application was made in 1996 for permission to use the lots as a container storage area. The application was rejected (one stated reason was because it fell into an area marked for the railway). Records stated that the area was at that time already used illegally as a container area although there was no record of how long it had been used as such.
Site Inspection - confirmed that the site is a container and storage area. Some container/offices/temporary structures. Vehicles using the area were mainly smaller lorries and vans. Some storage of chemicals on site - included isopropyl alcohol and polystyrene beads in drums.
Potential for Land Contamination - there is some potential for contamination, depending on whether any leakages or spills have occurred from vehicles or drums because the rough ground surface would be suitable for infiltration of contaminants. Contamination is likely to be mainly oils.
DD96/ 772 (part) (Plate 7.29)
Landuse Survey - A planning application was made by Hong Kong Bamboo Trading Co. in 1993 to use the site as a bamboo goods factory. This application was rejected. The files do not record if this was a previous illegal landuse.
Site Inspection - the site is used by a metal (and possibly) waste recycling company, presumably illegally as the lot records do not indicate any current landuse. There are many vehicles parked here and the ground is roughly surfaced.
Potential for Land Contamination - there is some potential for contamination, depending on whether any leakages or spills have occurred from vehicles because the rough ground surface would be suitable for infiltration of contaminants. Heavy metal and oil based contamination could have occurred.
DD95/ 801 S.A. ss.1 RP
Landuse Survey - Area has been covered, since 1980, by STW 596 which permits the site to be used as a sawmill and timberyard
Site Inspection - No access could be gained to the site and it is not possible to see what the landuse is through the very high fencing erected around the site. The sign on the gate says that this is an engineering company.
Potential for Land Contamination - If the site is used as a sawmill and timber yard it is unlikely that contamination will have occurred. It will be necessary to gain access to this lot in order to determine this.
DD95/ 801 S.A. RP
Landuse Survey - Area covered by STW 1040 issued in 1992 to Universal plywood Holdings Ltd for use as a sawmill and timberyard. Previous to this the site was owned by Allied Well Shipping Ltd and was registered as a transport site. It's use at this time however, was also as a sawmill and timberyard.
Site Inspection - site is used as storage for timber and as a sawmill. No chemical treatment or painting of wood occurs on the premises. Some storage of lubricants for machinery was noted. Site appears to be well maintained and ground is concreted.
Potential for Land Contamination - As the site appears to be organised, tidy and clean and no chemical process are carried out here the potential for contamination is low.
DD95/ 803 S.A. ss.1 (No Photo)
Landuse Survey - District Lands Office were not able to supply any information
regarding this site
Site Inspection - The lot could only be seen through the gates from where it seemed
to be a storage area for the adjacent factory. No contaminating materials were
observed, however chemicals used to treat leather are known to be hazardous to
soil and cause land contamination.
Potential for Land Contamination - the possible storage of chemicals used to treat leather should be investigated and an inventory of chemicals used at the factory compiled to determine the possibility of contamination. Any contaminants present are likely to be organic liquids.
DD95/ 803 S.A. ss.2, 803 S.A. RP and 803 S.A. ss.3
Landuse Survey - The three lots are covered by three short term waivers, STW 1066,
1064 and 1061, all issued in 1970. All STW's were issued to Far East Leather
and Plastic Factory Ltd which changed to Far East Leather Factory Ltd in 1971
and then to Far East Bags Factory Ltd in 1987. The waivers were issued for the
production of travelling bags. Records show that a factory of this type has
been located here since at least 1964. Only a small portion of the factory area
will be affected.
Site Inspection - A leather and bag factory exists at this site. The area of this
site which will be affected by the Spur Line works is a concreted driveway.
Potential for Land Contamination - As there affected area is the driveway it is unlikely that there will have been any chemical storage at this point and therefore contamination is unlikely. However, further checking shoudl take place to establish the exact nature of the former leather using actuvities as anthrax is a known health risk contaminant associated with such inductries.
DD95/ 803 S.B. (Plate 7.30)
Landuse Survey - District Lands Office were not able to supply any information
regarding this site
Site Inspection - Car repairs/dismantling and scrap yard. Wood and glass debris on
floor which is concreted and vegetated.
Potential for Land Contamination - Contamination is possible as this is a landuse listed in ProPECC PN 3/94.
DD95/ 1994 (Plate 7.31)
Landuse Survey - Cheung Lung Metal Works has been using this site since 1980. The
company made an application in 1995 to be registered as the land user. This
application was rejected.
Site Inspection - The site was observed being used as a metal works during a site
visit in 1998, however, it now appears to be disused and abandoned, however,
there is still a large amount of equipment stored here. The lot is concreted.
Potential for Land Contamination - Although metal works are listed as a potentially contaminating landuse in ProPECC PN 3/94 there is not much evidence at the site that contamination may have occurred. Further investigations should be carried out to determine any impacts, especially in view of the 20 year period over which this site has been used as a metal works. Inorganic contaminants could be present, as could solvents and heavy metals.
DD95/ 229
Landuse Survey - District Lands Office were not able to supply any information
regarding this site
Site Inspection - Lot appears to have been used as some sort of workshop and storage area. Now abandoned.
Potential for
Land Contamination - The site is unlikely to be
contaminated. However, care should be taken when excavating the concrete from
the site in case any infiltration of past spillages has occurred.
DD95/ 43 - 45, 53 - 59, 65 - 67, 70 - 74
Landuse Survey - District Lands Office were not able to supply any information
regarding this site so far
Site Inspection - site area is fenced off and used by Paul Y ITC for repair and
maintenance of vehicles and machinery. Access to the site was denied.
Potential for Land Contamination - Maintenance of vehicles and machinery may require the use of fuels, lubricants and solvents which are likely to cause contamination of the site. Before any recommendation can be made chemicals used must be identified in order to assess the degree to which contamination may be likely.
Proposed Temporary Works areas in Sheung Shui
Landuse Survey - All fall into Government Land. Four areas which will be used as temporary works areas are of concern. These are:-
(i) the works area currently used under the Shek Sheung River Training;
(ii) the container lorry parking and storage area at the site of the former Sheung Shui temporary housing area;
(iii) the proposed works area east of the alignment which is currently a container lorry parking area; and
(iv) the car park east of San Wan Road and south of Po Shek Wu Road.
Site Inspection -
(i) the site area seems well organised and any contaminated land should have been dealt with under the river training works programme. There are some chemicals and lubricants stored on site but there appears to have been no spillage and they are stored in appropriate areas.
(ii) Site is well concreted and container storage seems more formalised than at many sites in the New Territories.
(iii) One end of the lot is used for car parking and the other for container parking. There is some leakage of oil, particularly at the container end. Surface is tarmac in places and gravel in others.
(iv) Site is just used as a car park. Surface is rough gravel but there is little evidence of surface spillage.
Potential for Land Contamination -
(i) Potential for land contamination is low as any contamination present should have been dealt with under river training works.
(ii) Site has only recently been converted to a container site, potential for contamination is low.
(iii) There is some oily waste on the ground surface which may have infiltrated through the gravel in places. Generally the potential for contamination is low. As the site will only be used on a temporary basis, provided the land is disturbed no further investigation of contamination should be required as the site would be being used on a fit-for-use basis.
(iv) Little evidence of potential contamination.
TABLE : REFERENCE VALUES AND GUIDELINES FOR SOILS
|
|
|
Soil
(mg/kg dry soil) |
|
Ground water (ug/L) |
||||
|
COMPONENT |
|
A |
B |
C |
|
A |
B |
C |
|
|
|
|
|
|
|
|
|
|
|
1. Metals |
|
100 |
250 |
800 |
|
20 |
50 |
200 |
|
Cr |
|
20 |
50 |
300 |
|
20 |
50 |
200 |
|
Ni |
|
50 |
100 |
500 |
|
20 |
50 |
200 |
|
Cu |
|
50 |
100 |
500 |
|
20 |
50 |
200 |
|
Zn |
|
200 |
500 |
3000 |
|
50 |
200 |
800 |
|
As |
|
20 |
30 |
50 |
|
10 |
30 |
100 |
|
Mo |
|
10 |
40 |
200 |
|
5 |
20 |
100 |
|
Cd |
|
1 |
5 |
20 |
|
1 |
2.5 |
10 |
|
Sn |
|
20 |
50 |
300 |
|
10 |
30 |
150 |
|
Ba |
|
200 |
400 |
2000 |
|
50 |
100 |
500 |
|
Hg |
|
0.5 |
2 |
10 |
|
0.2 |
0.5 |
2 |
|
Pb |
|
50 |
150 |
600 |
|
20 |
50 |
200 |
|
|
|
|
|
|
|
|
|
|
|
2. Inorganics |
|
|
|
|
|
|
|
|
|
NH4
(as N) |
|
- |
- |
- |
|
200 |
1000 |
3000 |
|
F (total) |
|
200 |
400 |
2000 |
|
300 |
1200 |
4000 |
|
CN |
(tot. free) |
1 |
10 |
100 |
|
5 |
30 |
100 |
|
|
(tot. comb.) |
5 |
50 |
500 |
|
10 |
50 |
200 |
|
S (total) |
|
2 |
20 |
200 |
|
10 |
100 |
300 |
|
Br (total) |
|
20 |
50 |
300 |
|
100 |
500 |
2000 |
|
PO4
(as P) |
|
- |
- |
- |
|
50 |
200 |
700 |
|
|
|
|
|
|
|
|
|
|
|
3. Aromatics Compounds |
|
|
|
|
|
|
|
|
|
Benzene |
|
0.01 |
0.5 |
5 |
|
0.2 |
1 |
5 |
|
Ethylbenzene |
|
0.05 |
5 |
50 |
|
0.5 |
20 |
60 |
|
Toluene |
|
0.05 |
3 |
30 |
|
0.5 |
15 |
50 |
|
Xylenes |
|
0.05 |
5 |
50 |
|
0.5 |
20 |
60 |
|
Phenols |
|
0.02 |
1 |
10 |
|
0.5 |
15 |
50 |
|
Total |
|
0.1 |
7 |
70 |
|
1 |
30 |
100 |
|
|
|
|
|
|
|
|
|
|
|
4. Polycyclic Hydrocarbons |
|
|
|
|
|
|
|
|
|
Naphthalene |
|
0.1 |
5 |
50 |
|
0.2 |
7 |
30 |
|
Anthracene |
|
0.1 |
10 |
100 |
|
0.1 |
2 |
10 |
|
Fenanthrene |
|
0.1 |
10 |
100 |
|
0.1 |
2 |
10 |
|
Flouranthene |
|
0.1 |
10 |
100 |
|
0.02 |
1 |
5 |
|
Pyrene |
|
0.1 |
10 |
100 |
|
0.02 |
1 |
5 |
|
1, 2 – benzopyrene |
|
0.05 |
1 |
10 |
|
0.01 |
0.2 |
1 |
|
Total |
|
1 |
20 |
200 |
|
0.2 |
10 |
40 |
|
|
|
|
|
|
|
|
|
|
|
5. Chlorinated Hydrocarbons |
|
|
|
|
|
|
|
|
|
Aliphatics |
|
|
|
|
|
|
|
|
|
|
(Individual) |
0.1 |
5 |
50 |
|
1 |
10 |
50 |
|
|
(Total) |
0.1 |
7 |
70 |
|
1 |
15 |
70 |
|
Chlorobenzenes |
|
|
|
|
|
|
|
|
|
|
(Individual) |
0.05 |
1 |
10 |
|
0.02 |
0.5 |
2 |
|
|
(Total) |
0.05 |
2 |
20 |
|
0.02 |
1 |
5 |
|
Chlorophenols |
|
|
|
|
|
|
|
|
|
|
(Individual) |
0.01 |
0.5 |
5 |
|
0.01 |
0.3 |
1.5 |
|
|
(Total) |
0.01 |
1 |
10 |
|
0.01 |
0.5 |
2 |
|
Chlor. PAHs (Tot.) |
|
0.05 |
1 |
10 |
|
0.01 |
0.2 |
1 |
|
PCB’s (Tot.) |
|
0.05 |
1 |
10 |
|
0.01 |
0.2 |
1 |
|
EOCL (Tot.) |
|
0.1 |
8 |
80 |
|
1 |
15 |
70 |
|
|
|
|
|
|
|
|
|
|
|
6. Pesticides |
|
|
|
|
|
|
|
|
|
Chlorinated organics |
|
|
|
|
|
|
|
|
|
|
(Individual) |
0.1 |
0.5 |
5 |
|
0.5 |
0.2 |
1 |
|
|
(Total) |
0.1 |
1 |
10 |
|
0.1 |
0.5 |
2 |
|
Pesticides |
|
|
|
|
|
|
|
|
|
|
(Total) |
0.1 |
2 |
20 |
|
0.1 |
1 |
5 |
|
|
|
|
|
|
|
|
|
|
|
7. Other Pollutants |
|
|
|
|
|
|
|
|
|
Tetrahydrofuran |
|
0.1 |
4 |
40 |
|
0.5 |
20 |
60 |
|
Pyridine |
|
0.1 |
2 |
20 |
|
0.5 |
10 |
30 |
|
Tetrahydrothiofene |
|
0.1 |
5 |
50 |
|
0.5 |
20 |
60 |
|
Cyclohexanes |
|
0.1 |
6 |
60 |
|
0.5 |
15 |
50 |
|
Styrene |
|
0.1 |
5 |
50 |
|
0.5 |
20 |
60 |
|
Gasoline |
|
20 |
100 |
800 |
|
10 |
40 |
150 |
|
Mineral Oil |
|
100 |
1000 |
5000 |
|
20 |
200 |
600 |
These values are not “standards”
but rather guidelines for use in assessing the significance of contaminated
land. A simplified explanation of the ABC levels: A-level implies unpolluted,
B-level implies popution present and further investigation required, c-level
implies significant pollution present and cleanup (preferably back to the A-level)
required.