The Phase I ESA assessment comprised of a site and environs reconnaissance, interviews with key informants, consultations with the property owner and neighboring land users. Desk studies were undertaken to determine the landuse history of the area and the physical and biological site setting. This enabled the development of a preliminary conceptual site model (CSM) for the property and a determination as to whether any potential Recognised Environmental Conditions (REC) were associated with the Subject Property.

The Phase 2 ESA comprised of an intrusive site investigation that targeted the likely release areas identified during the Phase 1 ESA. The scope of works included concrete coring followed by the rotary boring of five exploratory holes across the Subject Property to a depth of 5 m below ground level (bgl) and the recovery of soil samples for laboratory analysis. Temporary groundwater monitoring wells were installed in the soil bores and groundwater samples were recovered. The recovered samples were submitted to an ISO:17025 accredited laboratory for analysis for a range of potential contaminants of concern (PCOC). The laboratory test results were compared with Thai and International Screening Values to determine the contamination status of the Property.

A wellhead position and elevation survey was undertaken to determine the hydraulic gradient in the shallow aquifer and strict QA/QC procedures were followed throughout the study.

The Phase 1 & 2 ESA report provided a full record of the works with clear conclusions, recommendations and an overall environmental risk rating for the Subject Property.