Giving soil a second life
The challenge we faced
As a proudly Australian-owned company, Caltex is committed to the future of the communities it serves. So a key focus is remediation of hydrocarbon-impacted soils during tank replacement programs. This soil is typically excavated from sites and trucked to a landfill, then replaced with clean, quarried soil which is transported to the site. This process is costly and unsustainable, which prompted Caltex to consider cost-effective alternatives that still met our environmental obligations.
How we solved it
Caltex launched a sustainable Soil Remediation Facility, which offers an end-to-end treatment solution for businesses. Soil is transported to the Caltex facility and arranged in mounds a few metres high. The piles are covered with tarpaulins and air is extracted through pipes to aerate the soil. Similar to a compost heap, biodegradation occurs naturally by stimulating aerobic microbial activity within the soil, encouraging contaminants to break down. Once treated, the soil is tested to ensure it meets standards agreed with NSW EPA. This soil is then re-used as engineered backfill on the former refinery section of the Kurnell site, as part of our remediation program.
What it achievedBy reusing remediated soil and eliminating the need to send thousands of tonnes of hydrocarbon-contaminated soil to landfills, Caltex is promoting smart and cost-effective resource recovery.
How you can benefitThe Caltex Soil Remediation Facility is a sustainable solution that delivers financial and environmental benefits to a business or project. It provides substantial cost savings, cuts project timelines and reduces impacts for local communities.
What’s more, it enables companies and landowners to reclaim land. This can deliver outstanding value at a time when land prices are soaring and environmental regulations are getting tighter.