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Viet Nam: 1. General description of why an area is selected 2. Specific description of the location West lake and the related channels, Hanoi city The largest lake of the lakes in Hanoi (4.13 km2, 6.0 m above sea level), a semi - closed water body with small inflow and outflow - channels (Tolich river). It received daily amount of waste water of about 10,000 m3 from surrounding urban areas. This lake are being developed for various recreational activities including fishing, boating and sightseeing. The rapid urbanization is the serious pollution potential of West lake. Ba Be lake, Cao Bang Province (about 300 km far from Hanoi) The only significant natural upland lake in the North of Vietnam (4.5 km2, 145 m above sea level). The lake is important for the life of the local people belonging to ethnic minority groups as the source of water, navigation and transportation. The pollution of POPs as alkyl phenols, PCBs, PAHs... in this area might be low due to low rate of industrial and urbanization of surrounding area. But in other side, DDT still being used for malaria control in upland area of Vietnam. It is expected to find out the accumulation of DDTs in samples collected at Ba Be lake. River and Channels in Ho Chi Minh city There are several reasons for the pollution by POPs of river and channel in Ho Chi Minh city: domestic, industry, agricultural. Some data of OCPs residuals in water and sediment samples in Ho Chi Minh city were provided by Prof. Tanabe (1993). Selected points will be chosen for the sampling in 2002 in order to get the comparison of available data. Ten samples were collected in Saigon River. In Rach Ben Nghe and Thi Nghe (the 2 main discharged water Chanels in HoChi Minh city), 9 samples were collected in July 2002. 3. Geographic coordinates of the sampling locations They will be specified later. 4. Sampling plan West lake and the related channels Samples will be collected in various point around West lake (inflow - outflow channels, near the old industry area - 10 points) and along the Tolich River - the biggest channel connected to West lake (10 points). Ba Be lake, Cao Bang Province It is expected to find out the accumulation of DDTs in samples collected at Ba Be lake. Number of sample (7 points) River and Channels In the first sampling (July 2002), 9 samples were collected in CuChi province - a typical agricultural area (90 km far from HoChi Minh city). 5. Country and specific area of maps Figure 1: Hotai Lake and Babe Lake, North of Viet Nam  Figure 2: Saigon River and channels- Ho Chi Minh City  Figure 3: Cu Chi Province 
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