4. LAND CONTAMINATION
4.1 Contamination Assessment Report
4.1.1 Risk-Based
Remediation Goals (RBRGs) for Industrial have been adopted for the “Main
Storeroom & Workshops” and the laboratory results for the sampling works (conducted
between 30 June 2021 to 16 July 2021) show that there are no exceedances of the
adopted RBRGs for the “Main Storeroom & Workshops”. As no contaminated soil
and groundwater was found within the “Main Storeroom & Workshops”, no
remediation actions are required for contaminated soil and groundwater for the
scheduled land use of the “Main Storeroom & Workshops”. Their findings are
summarized in Contamination Assessment Report (CAR) and submitted to EPD on 1 November
2021.
4.1.2 Risk-Based Remediation Goals (RBRGs) for
Industrial have been adopted for the “Mechanical Workshop” and the laboratory
results for the sampling works (conducted between 23 July 2021 to 4 August 2021)
show that there are no exceedances of the adopted RBRGs for the “Mechanical
Workshop”. As no contaminated soil and groundwater was found within the
“Mechanical Workshop”, no remediation actions are required for contaminated
soil and groundwater for the scheduled land use of the “Mechanical Workshop”. Their
findings are summarized in Contamination Assessment Report (CAR) and submitted
to EPD on 23 November 2021.
4.1.3 Risk-Based Remediation Goals
(RBRGs) for Industrial
have been adopted
for the “Waste Storage Area”
and the laboratory
results for the
sampling works (conducted
between 24 November 2021 to
26 January 2022)
show that there are no exceedances of the adopted RBRGs for the “Waste
Storage Area”. As no contaminated soil and groundwater was found within the “Waste
Storage Area”, no remediation actions are required for contaminated soil and groundwater
for the scheduled land use of the “Waste Storage Area”. Their findings are summarized
in Contamination Assessment Report (CAR) and submitted to EPD on 29 April 2022.
4.1.4 Risk-Based Remediation Goals (RBRGs) for
Industrial have been adopted for the “SAS Thickener House-1” and the laboratory
results for the sampling works (conducted between 13 April 2022 to 16 May 2022)
show that there are no exceedances of the adopted RBRGs for the “SAS Thickener
House-1”. As no contaminated soil and groundwater was found within the “SAS
Thickener House-1”, no remediation actions are required for contaminated soil and
groundwater for the scheduled land use of the “SAS Thickener House-1”. Their
findings are summarized in Contamination Assessment Report (CAR) and submitted
to EPD on 6 July 2022.
4.1.5 Risk-Based
Remediation Goals (RBRGs) for Industrial have been adopted for the “SAS
Thickener House-2” and the laboratory results for the sampling works (conducted
between 15 February 2023 to 23 February 2023) show that there are no
exceedances of the adopted RBRGs for the “SAS Thickener House-2”. The
laboratory results are compared against the adopted RBRGs and soil saturation
limit (Csat) for soil samples and the adopted RBRGs
and the solubility limits for groundwater samples. No exceedance of RBRG are recorded for both soil samples and groundwater samples. Furthermore,
no exceedance of the soil saturation limit are
recorded for soil samples. However, the exceedances of solubility limits for
PCRs (C9-C16) are recorded for groundwater samples collected at BH-18, BH-19,
BH-20 and BH-21; and also PCRs (C17-C35) for BH-21. As
no non-aqueous phase liquid (NAPL) was observed during sampling, no further
sampling and remediation are required. As no contaminated soil and groundwater
is found within the “SAS Thickener House-2”, no remediation actions are
required for contaminated soil and groundwater for the scheduled land use of
the “SAS Thickener House-2”. Their findings are summarized in Contamination
Assessment Report (CAR) which was certified by ET Leader and verified by IEC on
31 May 2023 and submitted to EPD on 19th June 2023.