The main tasks of this project are to manage the control of volatile organic compound (VOC) pollution sources and the investigation of harmful air pollutants in the industrial zones of outlying islands, so as to monitor the emission of VOCs in the industrial zones of outlying islands and carry out the inspection, testing and follow-up control of VOC pollution sources, in order to improve the effectiveness of the inspection, control and emission reduction of VOCs and harmful pollutants in the industrial zones of outlying islands, so as to maintain the air quality of the County and reduce the impact on people's health. Since its implementation on the bid date (January 31, 2020), the project has been executed in accordance with the contract provisions, original planned work items and execution methods, and the final report was completed before the deadline (December 31, 2020), with the major achievements summarized below:
(1) The compliance inspection of the emission pipeline and control equipment in blacklisted petrochemical processes was completed for a total of 30 processes, and the inspection results were all in line with the requirements. In addition, a total of 30 pipe times of volatile organic compound (THC) inspection were completed for the emission pipelines in blacklisted petrochemical processes. When the P005 inspection of the emission pipeline in the carbon fiber plant (M01 process) of Formosa Plastics Mailiao Plant was carried out, the exhaust gas flowmeter of the absorption tower (A005) of the control equipment in the plant was out of order and the failure reporting procedures were not completed. This non-compliance was reported to the Environmental Protection Bureau for disposal.
(2) The compliance inspection of 43 exhaust gas combustion towers in the industrial zones of outlying islands was completed, and five samples were collected and analyzed at the places where the exhaust gas were introduced during the operation of the exhaust gas combustion towers. From March 23, 2020 to March 24, 2020, the light oil plant of Formosa Petrochemical Mailiao No. 1 plant used the combustion towers AR02, AR04 and AR05 for emission due to the failure of its power facilities system. The combustion tower AR02 was operated from 7 p.m. on March 23 to 2 a.m. on March 24, all exceeding 46,000 cubic meters per hour as approved in the combustion tower usage plan; the calorific value of the combustion tower was inspected, and from 3 p.m. to 3:15 p.m. on March 23, the calorific value was 49.96 MJ/Nm3 and 44.06 MJ/Nm3, which did not meet the approved calorific value of 40 MJ/Nm3≥ HT≥12 MJ/Nm3 of the combustion tower usage plan. This non-compliance was reported for disposal.
(3) On the inspection of the emergency emission of exhaust gas combustion towers, the No. 2 light oil cracking plant of Formosa Petrochemical Mailiao No. 3 Plant resumed operation on June 5, 2020 after the repair of its process cracking furnace pipeline, and the exhaust gas was discharged to the combustion tower for treatment. After checking the use of exhaust gas combustion towers A001 ~ A003, the weight ratio of steam quantity to exhaust gas quantity of combustion towers A001 ~ A003 was between 3.04% and 366%, which does not meet the requirements of the second item in the approved usage plan on the start-up condition. The maximum ratio of steam quantity to exhaust gas quantity should not exceed 200% due to the process characteristics, and this non-compliance was reported for disposal.
(4) A total of 208 fixed roofs and internal floating roofs with closed gas gathering and treated by control equipment were inspected for compliance with the regulations. The results showed that all manufacturers operated in accordance with the regulations.
(5) A total of 10 external floating roof tanks were tested with Grade II seal detection by quick screening tools (Gasfind IR and FID), and inspections were carried out on regulatory compliance. The results showed that all the manufacturers regularly carried out the seal inspection according to the regulations.
(6) Inspections were carried out for a total of 11 case times on the oil and gas collection method before the opening and cleaning of blacklisted storage tanks and exhaust gas treatment sites, and the results showed that all the manufacturers operated according to the regulations.
(7) A total of 230 location times of leakage inspection on 17 storage tanks were completed, and no leakage was found.
(8) A total of 45 blacklisted loading yards were inspected for regulatory compliance. On the regulatory compliance inspection of the M02 loading yard L101 of Changchun Petrochemical Mailiao Plant, according to the operating records of the control equipment scrubber (A2020) provided by the manufacturer, the exhaust gas treatment capacity on the four days of March 12, February 12, February 10 and February 6, 2020 exceeded the operating range (55~320 kg/hr) as approved in the operating permit, and the non-compliance was reported to the Environmental Protection Bureau for disposal. In addition, a total of 870 loading yard equipment components were inspected, and no leakage was found.
(9) A total of 26 plants were inspected for the air tightness of wastewater facilities. During the inspection, it was found that the oil-water separation tank No. T-3280-1 of Nanya Haifeng General Plant (isononyl alcohol plant) did not maintain air tightness, and the highest net inspection value was 12,326.7 ppm (greater than 1,000 ppm); in addition, it was found not under the control of the permit, and this non-compliance was reported for disposal directly according to the air tightness inspection results. The sampling test results of sludge treatment facility No. T01-23 of Formosa Chemicals ＆ Fiber Mailiao Plant (pure terephthalic acid plant) did not maintain air tightness, the highest net test value was 8,316.8 ppm (greater than 1,000 ppm), and the results of air tightness test were reported for disposal. The site numbered V980 of wastewater collection system at Formosa Petrochemical Mailiao No. 3 Plant (No. 2 light oil cracking plant) had the highest net inspection value is 31,611.6 ppm (greater than 1,000 ppm), and it was found not under the control of the permit. The non-compliance was reported for disposal directly according to the requirement that the liquid level of the wastewater collection system shall not contact the atmosphere.
(10) A total of 30 cooling towers were inspected at the inlet and outlet, and the analysis report showed that all plants met the regulatory standard of 5 mg/L.
(11) A total of 23,346 process equipment components were inspected for leakage, and 36 of them had leakages greater than the defined value (1,000ppm); the manufacturers have completed the repairs within 24 hours according to regulations and have been verified by the undertaker. In addition, a total of 11 components had leakages greater than the leakage control value (10,000ppm), including one at the butanol plant of Formosa Plastics Haifeng Plant, one at the isooctanol plant of Nanya Mailiao General Plant, one at the No. 1 light oil cracking plant of Formosa Petrochemical Mailiao No. 2 Plant, one at Changchun Petrochemical Mailiao Plant, four at the northwestern tank of Formosa Petrochemical Mailiao First Plant, and three at the No. 3 light oil cracking plant of Formosa Petrochemical Mailiao Third Plant. The pipelines beside two components at the terephthalic acid plant of Formosa Chemicals & Fiber Mailiao Plant were damaged, and one component was damaged in the epoxy resin plant of Nanya Mailiao Plant. The non-compliance was reported to the Environmental Protection Bureau for disposal.
(12) 17 processes were investigated on the use of raw materials, operation records of pollution sources and control equipment, and declaration records of air pollution charges. It was found that no air pollution charges declaration was made for the emission of 13 individual items from pollution sources including exhaust gas combustion towers, equipment components and loading operation facilities, and the list was transferred to the air pollution charges group for recovery.
