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 also undertaken to determine the landuse history of the area and the physical and natural environmental setting. This enabled the development of a preliminary conceptual site model (CSM) for the property and a determination as to whether any 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 study site to depths ranging from 6 to 8m 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).

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 laboratory test results were compared with Malaysian and US EPA Tier 1 Screening Values to determine the contamination status of the property. 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.