tailieunhanh - Modular Wetlands Impact on Water Quality in Oceanside Harbor

In China, where population size is the biggest in the world and environmental destruction is proceeding due to the rapid economic growth and urbanization, there is a serious water pollution problem. Since 1949 water pollution caused by industrial wastewater has increased, and especially since the economic reform in the 1970s, pollution has escalated1 (Banister 1998: 995); at the same time the population in urban areas doubled from 1978 to 1995 (Shen 1998: 38-9), due to migration from rural areas to urban cities (Banister 1998: 1011; Shen 1998: 33), and urbanization emerged rapidly (Shen 1998: 38-9), with population growth and. | Modular Wetlands Study In Oceanside Harbor Modular Wetlands Impact on Water Quality in Oceanside Harbor September 2008 Prepared by Michael Alberson and Tim Klein Geosphere Consultants Inc. 1150 Hamilton Lane Escondido CA 92029 88-02205-A Project Manager Michael Alberson CPSWQ CPESC CESSWI REA Modular Wetlands Study In Oceanside Harbor Background The location of Modular Wetland unit that the sampling and analysis was completed is the boat washing area in Oceanside Harbor in Oceanside California. Oceanside Harbor is heavily used with dozens of boats being washed down daily in a small area where the septic tank disposal area is also located fig. 1 . Figure 1 top Modular Wetlands Linear bottom Oceanside Installation 2 Modular Wetlands Study In Oceanside Harbor The wash water is typically potable water that is used to wash the boats soap is not allowed but many waste products enter the wash off water and into the storm drains figure 2 which is treated by the device being tested - Modular Wetlands Storm Water Filtration Sy stem MWS before being directly discharged into Oceanside Harbor. boat wash B RV DUMP ao THRU TAAPÍỊC WASH r Dump .STAT aV Wiu. Be 1 Figure 2 Left posted signage Right Washing area with soap being used. The pollutants contained in the wash water can include sand sewage waste plant materials oil grease diesel dead fish paper products soap products and petroleum products. Samples analyzed from 2007-2008 show multiple instances of Total Coliform above 1 600 000 MPN 100ml Fecal Coliform above 18 755 MPN 100ml and Enterococcus above 24 196 MPN 100ml all of which are above the action level determined by the City of Oceanside. The action levels are 160 000 MPN 100m for Total Coliform 18 755 MPN 100m for Fecal Coliform and 17 820 MPN 100m for Enterococcus for the City of Oceanside. Before the Modular Wetlands Device was installed the boat wash water was treated by StormCeptor vaults installed in 2003. After installation bacteria levels still exceeded action .