Final remediation works for the former Cresco site, Bayswater

CSBP Limited propose to remediate the former Cresco site in Bayswater.

There is up to 280,000 m³ of contaminated soil present on site. The contamination was caused by the disposal of pyritic wastes or cinders, lead chamber washings, sodium bisulphate, den-scrubber effluent, superphosphate and other building wastes during the site’s history. The cinders, sodium bisulphate and den-scrubber effluent were deposited in excavated pits while the other wastes were disposed of on a more random basis. The proposed soil remediation involves the excavation of contaminated soil and disposal to landfill or treatment and reuse.

Groundwater under and down-gradient of the site has become acidic and is contaminated by heavy metals. Contaminated groundwater has moved towards the Swan River, and therefore poses a risk to the river.