Environmental Project's Achievements Reports Query System

Investigating Soil and Groundwater Pollution in Gas Stations Established between Years 1993 and 1997 in Taiwan

Absrtact	Sinotech Engineering Consultants Ltd. completed the “Investigation Plan for under 10-years-old Gas Station (established during 1993~1997)”. In this plan, the background and pollution potential of underground environment in total 200 gas stations in southern Taiwan had been investigated. The investigation was conducted in three Phases. In Phase I Investigation, the on-site activities focused on durect-push in-situ soil vapor analysis. The results exceeding screening criteria were selected for further investigation. In Phase II Investigation, temporary monitoring wells were installed at the selected stations. Then soil and groundwater samples were collected for laboratory analysis. In Phase III Investigation, it focuses on the station that groundwater quality exceeding groundwater Control Standards. he activities including standard groundwater monitoring well installation and groundwater analysis. In Phase I Investigation, we inspected 200 gas stations, 2,461 soil vapor monitoring wells and 800 durect-push in-situ soil gas analysis by using LEL(Lower Explosion Level) detector, PID(Photoionization Detector) and FID(Flame Ionization Detector) and checked the capabilities of those wells (including the cap could be opened or not, water accumulation and ventilation test, etc.). There were 286 soil vapor-monitoring wells failed. According to investigation results, 31 gas stations were screened to enter the next step (Phase II). In Phase II Investigation, we sampled and analyzed 145 soil samples and 82 groundwater samples from temporary groundwater monitoring wells. Base on the analyzing values, 10 gas stations were detected that on-site soil exceeding Soil Control Standards. Besides, 12 gas stations were detected that on-site groundwater exceeding groundwater Control Standards then screened to enter the next step (Phase III). In Phase III Investigation, 13 gas stations were selected and 5 gas stations were detected that groundwater exceeding Groundwater Control Standards. According to the identification results，11 gas stations were exceeding the “Soil Pollution Control Standards ” or the “Groundwater Pollution Control Standards”. Taiwan EPA have to do the follow-up control according to the “Soil and Groundwater pollution Remediation Rules”
Keyword	Gas,Station,,Soil,,Groundwater

Absrtact

Sinotech Engineering Consultants Ltd. completed the “Investigation Plan for under 10-years-old Gas Station (established during 1993~1997)”. In this plan, the background and pollution potential of underground environment in total 200 gas stations in southern Taiwan had been investigated. The investigation was conducted in three Phases. In Phase I Investigation, the on-site activities focused on durect-push in-situ soil vapor analysis. The results exceeding screening criteria were selected for further investigation. In Phase II Investigation, temporary monitoring wells were installed at the selected stations. Then soil and groundwater samples were collected for laboratory analysis. In Phase III Investigation, it focuses on the station that groundwater quality exceeding groundwater Control Standards. he activities including standard groundwater monitoring well installation and groundwater analysis. In Phase I Investigation, we inspected 200 gas stations, 2,461 soil vapor monitoring wells and 800 durect-push in-situ soil gas analysis by using LEL(Lower Explosion Level) detector, PID(Photoionization Detector) and FID(Flame Ionization Detector) and checked the capabilities of those wells (including the cap could be opened or not, water accumulation and ventilation test, etc.). There were 286 soil vapor-monitoring wells failed. According to investigation results, 31 gas stations were screened to enter the next step (Phase II). In Phase II Investigation, we sampled and analyzed 145 soil samples and 82 groundwater samples from temporary groundwater monitoring wells. Base on the analyzing values, 10 gas stations were detected that on-site soil exceeding Soil Control Standards. Besides, 12 gas stations were detected that on-site groundwater exceeding groundwater Control Standards then screened to enter the next step (Phase III). In Phase III Investigation, 13 gas stations were selected and 5 gas stations were detected that groundwater exceeding Groundwater Control Standards. According to the identification results，11 gas stations were exceeding the “Soil Pollution Control Standards ” or the “Groundwater Pollution Control Standards”. Taiwan EPA have to do the follow-up control according to the “Soil and Groundwater pollution Remediation Rules”

Keyword

Gas,Station,,Soil,,Groundwater