Environmental Project's Achievements Reports Query System

Soil and Groundwater Investigation for Northern and Centrual Taiwan Gas Stations under 10-year-old (establish during 1993~1997)

Absrtact	This project focus on soil and groundwater investigation and potential contaminated verification of those gas stations under 10-year-old (established during 1993~1997). The investigation results and collected gas station data including basic information, groundwater pollution prevention facilities and periodically submit environmental monitoring data will be carefully reviewed then carried on for the following administrative control. The investigation was conducted in three Stages. In first Stage, the on-site activities focused on in-situ soil vapor analysis around storage tank area, and soil gas survey in other potential area of gas station by using portable instruments, including LEL, PID and FID. The results exceeding screening criteria made by EPA were selected for further investigation. In Stage II, according to the investigation of Stage I, soil sampling and temporary monitoring wells were installed at the selected stations. Then soil and groundwater samples were collected for laboratory analysis. The soil and groundwater samples analysis results of laboratory were compare with “Soil Control Standard” and “Groundwater Control Standard”. In third Stage, it focuses on the station that groundwater quality exceeding Groundwater Control Standards. The activities including standard groundwater monitoring well installation and groundwater sampling and analysis in the laboratory. In total of 200 gas stations were investigated in Stage I. The activities including inspection of 2445 soil vapor monitoring wells and 819 soil gas analysis. In Stage II, 148 soil samples were collected and analyzed. Furthermore 55 temporary groundwater monitoring wells were installed and sampled for analysis from the selected 28 gas stations. Five gas stations were detected that on-site soil samples exceeding Soil Control Standards, the major contamination including BTEX and TPH, and nine gas stations were detected that on-site groundwater samples exceeding Groundwater Control Standards, the major contamination including benzene and methylbenzene. In third Stage, 19 gas stations were selected and five gas stations were detected that groundwater exceeding Groundwater Control Standards, the major contamination was benzene.
Keyword	Gas,Station,,Soil,,Groundwater,,Soil,Vapor,Monitoring,Well

Absrtact

This project focus on soil and groundwater investigation and potential contaminated verification of those gas stations under 10-year-old (established during 1993~1997). The investigation results and collected gas station data including basic information, groundwater pollution prevention facilities and periodically submit environmental monitoring data will be carefully reviewed then carried on for the following administrative control. The investigation was conducted in three Stages. In first Stage, the on-site activities focused on in-situ soil vapor analysis around storage tank area, and soil gas survey in other potential area of gas station by using portable instruments, including LEL, PID and FID. The results exceeding screening criteria made by EPA were selected for further investigation. In Stage II, according to the investigation of Stage I, soil sampling and temporary monitoring wells were installed at the selected stations. Then soil and groundwater samples were collected for laboratory analysis. The soil and groundwater samples analysis results of laboratory were compare with “Soil Control Standard” and “Groundwater Control Standard”. In third Stage, it focuses on the station that groundwater quality exceeding Groundwater Control Standards. The activities including standard groundwater monitoring well installation and groundwater sampling and analysis in the laboratory. In total of 200 gas stations were investigated in Stage I. The activities including inspection of 2445 soil vapor monitoring wells and 819 soil gas analysis. In Stage II, 148 soil samples were collected and analyzed. Furthermore 55 temporary groundwater monitoring wells were installed and sampled for analysis from the selected 28 gas stations. Five gas stations were detected that on-site soil samples exceeding Soil Control Standards, the major contamination including BTEX and TPH, and nine gas stations were detected that on-site groundwater samples exceeding Groundwater Control Standards, the major contamination including benzene and methylbenzene. In third Stage, 19 gas stations were selected and five gas stations were detected that groundwater exceeding Groundwater Control Standards, the major contamination was benzene.

Keyword

Gas,Station,,Soil,,Groundwater,,Soil,Vapor,Monitoring,Well