This plan performed from Mar. 2 2009 to Feb. 28 2010. There are two prime goals of this plan: first, using air pollution sources control system to develop the strategy of the management of total emission amount and investigating the amount of air pollution emission around the neighbor area of Taichung Harbor. All projects in the plan are 100% reach its goal.
According the county’s 2008 base annual emission data, TSP are mainly emitted from vehicle raised particles and construction sides (both accounts for approximately 73% of total emission), SOx emissions are primary from factories(accounts for approximately 92% of total emission), NOx emission are mostly from factory and transportation vehicles (both accounts for 56% and 37% respectively), NMHC emission are from factory point sources and plane sources accounting for 59%, transport vehicles and sources other than industrial emissions account for approximately 19% and 22% respectively; in addition, electrical power generation industry and steel industry are the main industries for larger pollutant emissions; regarding industrial zones, the most severe pollution zone of Taichung County is the Sea Zone of Taichung Harbor Special Designated Zone.
Future major pollution sources of the county that are within grasp include the Second Stage Chun-Long Steel Works, Taichung Technology Park Taichung Base and Ho-Li Base developments, and Shen-Gun-Fun-Jou Industrial Zone development project, it is estimated upon operation in 2013, by then TPS increase will reach 2589 metric tons, SOX increase will reach 4697 metric tons, NOX increase will reach 6605 metric tons, and NMHC increase will reach 4388 metric tons. these increased numbers are likely to create an impact on Taichung’s air qualities, thus it is necessary to grasp the county’s tolerance capacity, through planning set Taichung county’s tolerable zone volume management solutions and strategies, in order to improve the county’s air quality.
Taichung county announced in 1999 “Taichung County Steal Industry Air Pollutant Emission Standards”, since then it has been ten years, in response to the planned standard procedures of Chun-Long Steal Works iron and steal furnace establishment within the county’s Taichung Harbor Special Designated Zone, its estimated pollution emission will be significantly more than the traditional electric arc furnace steal refinement production process, thus the current plan is proposed according the current steal industry restrictions and concerns for current feasible control technology advancements, in order to make adjustments and amendments to the current insufficient rules and regulations, it is intended by making amendments to the emission standards to effectively decrease pollutant emission concentrations, in order to improve the county’s air quality problems, the draft content includes measures for sintering factories, coking factories, blast furnace factories, converter factories, electric furnace factories, and hot rolling factories, by particle pollutants, sulfur oxide compounds, and nitrogen oxide compounds to draft feasible and stringent recommended emission concentration restriction standards, in addition to targeting sintering factories and electric factories and draft dioxin stringent restriction standards, it is proposed to decrease the current 0.5ng-TEQ/Nm3 to 0.4ng-TEQ/Nm3, as for designs of coal pile zones with projected area of 1000m2 , it is recommended to regulate piling to storage facilities within closed building structures. Promote the phase-way is in the year 2011, 2013,2019.
In consideration for the county’s current ozone and floating particles are both level three restriction zones, and that there are many pending future major development projects going into operation, thus on the basis of necessary strategy implementation for air quality improvements, other than reinforcing execution of air pollution restriction key tasks, it is essential by spirit of total volume restriction or management, estimate the county’s future emission volume changes and whether it will exceed tolerable capacities, and further implement relevant feasible zone total volume management measures and solutions in order to improve the county’s air quality.
Currently the Taichung county tolerance volume management system and solution estimate is complete, and a seminar of professionals and academics has been held, the initial plan for the current stay is to refer to the essence of Environment Protection Administration’s tolerance volume management, and use the county’s boarder as the premise, set the Taichung pollutant tolerance volume management system, in order to achieve the Environment Protection Administration’s set central district air quality zone PSI>100 ratio less than 1.37% and the county’s air pollution restriction zone to raise to level two as the goal), and use this target to estimate and set the county’s various pollutant allowed emission level, as well as draft the county’s future five year enforceable and promotable related strategies, including solution one: improved execution of current existing restriction strategies; solution two: co-work with Environment Protection Administration’s existing restriction measures; solution three: execute the county’s specially designated pollution category and local improved management measures (such as power generation and steel industries stringent emission standards), after estimated calculations, simultaneously executing each of the strategies of solutions one, two and three, it is estimated in year 2016 after the restrictions the net emission volume should be under the allowed emission levels target, in other words, the county’s ozone and floating particles pollutant level should meet the concentration value of air quality standards level two in 2016 (restriction level two standards).
In addition, in regards to future economy developments, there could be new additions to major development constriction applications being set up, for this it can be considered to create zero emissions verification system, that is, if new additional major development project’s annual target increased emission levels is over the county’s tolerance volume level, then request should be made at the environmental estimations stage for new set pollution sources in the increased volume aspect, seek the county’s other pollution sources through replacement of old for new restriction equipments and proceed with emission redemption reduction, and reach the zero emission/zero increase target.
There are two serious air pollution events sampling on Aug. 15~17 2009 and Nov. 4~6 2009, the analysis were all done. There are 720 samples of inorganic pollutants, 96 samples of VOCs, 24 samples of particle matter and 24 samples of PM 2.5 and its precursor’s compounds in each monitor sampling. In these analyses conclude that, under the influence of high pressure condition, the wind field of the central area of Taiwan was dominated by the feeble eastern wind. The downdraught formed at the wind-back side of mountain chain formed the air temperature inversion layer, it made the pollutants diffused uneasy, and the raise of the concentration of air pollutants on Dali area. The result of analysis of high concentration of zone had shown that when the concentration of ozone on Dali area was rising, the intensity of heat island effect was more significant, however, on the coast area of Changhua was not. That means temperature is not the reason of the accumulation of the ozone concentration.
According to the data of PM 2.5 and PM2.5-10 of thermal power plant and steel plant, the percentage of PM 2.5 of thermal power plant was between 0.7% ~ 2.6% on 4 air pollutant monitoring stations. And it shows that the feature elements of emissions are As and Se. The percentage of PM 2.5 of steel plant was between 0.1% ~ 0.5%, and it’s feature elements are Fe, Zn and Pb. In addition, the feature elements of the vessels are Ni and V.
It shows that the VOCs on 4 monitoring stations come from the mobile source pollution, the most part of pollution come from cars. It means the source of most part of open path VOCs on central area of Taiwan come from vehicles. The result of the simulation of vessels’ emission shows that due to the height of chimney of vessels isn’t high enough and made the transmission of pollutants being blocked by the Mt. Dadu. In the mean time, the most part of wind direction of sampling period was not west wind, and it further reduced the possibility of the transmission to the inland area. Using the tracing model to estimate the trans path of the pollutants of the central metro area of Taiwan, it shows that the ozone pollution events is mainly influenced by the local circumfluence, the pollutants’ transmission path come from Wuchi coast area to inland.