(3) Gas station (oil depot) contaminated sites
Based on the established list, gas stations (oil depots) will be screened for key
groundwater investigation and assessment according to the following principles:
(a) all oil depots; (b) gas stations that have witnessed oil spill incidents; and
(c) where oil spills are not confirmed: (i) gas stations located in the areas where the
groundwater is protected as drinking water source and replenished and areas with
groundwater runoff, and (ii) gas stations beyond these areas, with priority given to
those established for more than 20 years or conditionally those established a shorter
period of time.
2.1.2 Process
2.1.2.1 MSWLFs and HWLFs
Given the current construction and operation models of MSWLFs and HWLFs in
China, the background investigation of groundwater environment is conducted
through steps as shown in Fig. 2.1.
2.1.2.2 OCS
Based on the current construction and operation models of China’s oil production
and sales industry, the background investigation of groundwater environment follows steps as shown in Fig. 2.2.
2.2 Content of Investigation
2.2.1 Data Collection
The data collection covers the reports on feasibility study (FS), environmental
impact assessment (EIA) and engineering geological survey related to contaminated
sites, site photos, site lists, basic information questionnaires, hydrogeological and
meteorological information questionnaires, onsite sampling information tables,
information tables and distribution map of monitoring wells, and historical monitoring data (Cai et al. 2011; Zhang et al. 2011; Xu et al. 2017). The data sources,
uses and requirements are described in Table 2.1.
As it is difficult to obtain the basic data of non-standard MSWLFs and
non-standard OCS, the large-scale basic data can be drawn from the relevant local
departments of land resources, water resources and environmental protection, and
12
2 Environmental Background Investigation of Groundwater …
Based on the established list, gas stations (oil depots) will be screened for key
groundwater investigation and assessment according to the following principles:
(a) all oil depots; (b) gas stations that have witnessed oil spill incidents; and
(c) where oil spills are not confirmed: (i) gas stations located in the areas where the
groundwater is protected as drinking water source and replenished and areas with
groundwater runoff, and (ii) gas stations beyond these areas, with priority given to
those established for more than 20 years or conditionally those established a shorter
period of time.
2.1.2 Process
2.1.2.1 MSWLFs and HWLFs
Given the current construction and operation models of MSWLFs and HWLFs in
China, the background investigation of groundwater environment is conducted
through steps as shown in Fig. 2.1.
2.1.2.2 OCS
Based on the current construction and operation models of China’s oil production
and sales industry, the background investigation of groundwater environment follows steps as shown in Fig. 2.2.
2.2 Content of Investigation
2.2.1 Data Collection
The data collection covers the reports on feasibility study (FS), environmental
impact assessment (EIA) and engineering geological survey related to contaminated
sites, site photos, site lists, basic information questionnaires, hydrogeological and
meteorological information questionnaires, onsite sampling information tables,
information tables and distribution map of monitoring wells, and historical monitoring data (Cai et al. 2011; Zhang et al. 2011; Xu et al. 2017). The data sources,
uses and requirements are described in Table 2.1.
As it is difficult to obtain the basic data of non-standard MSWLFs and
non-standard OCS, the large-scale basic data can be drawn from the relevant local
departments of land resources, water resources and environmental protection, and
12
2 Environmental Background Investigation of Groundwater …