Table 7.8 Possible Remediation Options and Preliminary Remediation Programme For HKSM Site

Scenario	Possible Quantity of Contaminated Soil ^(1)	Possible Remediation Options ^(2)	Preliminary Remediation Programme
Scenario 1	No contaminated soil	Nil	Nil
Scenario 2	Small volume of contaminated soil	Landfill disposal	3 to 5 months ^(3)
Scenario 3	Large volume of contaminated soil which requires for the set-up of on-site/off-site treatment plant	Option 1 – On-site treatment by biopiling and/or cement solidification/stabilisation	12 to 18 months
		Option 2 – Off-site treatment by biopiling and/or cement solidification/stabilisation	12 to 18 months

Notes:

(1) Small volume of contaminated soil is expected to be a few hundreds cubic meters while the large volume of contaminated soil is likely more than a thousand cubic meters.

(2) A complete comparison of the pros and cons of all possible remediation options (plus recommendation) to be provided in the future RAP submission so as to justify the proposed remediation options and determine the best feasible option for contaminated soil treatment.

(3) Application of landfill disposal to Facilities Management Group of EPD is normally required 3 months before disposal. Such application would be made as soon as possible if excavation and landfill disposal is confirmed for soil remediation.