Key Policies


Here are key Delta policies with our commitments to safety, quality and environmental performance.


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We insist that everyone has the right to come to work with the expectation that they will return home safe and healthy, every day. We are committed to a safe and healthy work environment for our employees, contractors and the communities in which we operate. We seek continuous improvements to achieve excellence in the management of health and safety in all of our workplaces.

Delta is certified as meeting ACC’s Tertiary level requirements for ACC’s Workplace Safety Management Practices.

Delta Safety Policy (PDF)

ACC Workplace Safety Management Practices (PDF)


Delta is committed to high quality outcomes in all that we do. Our goal is always to meet, or exceed, our customers’ expectations. We look for new ways, new ideas and improvements that will change the results for the better.

Continuous quality improvement is a daily focus. That commitment is backed up with a comprehensive Quality Management System including documented systems, processes and procedures.

We maintain a robust system of both internal and accredited external audit. Review findings are investigated with appropriate corrective actions taken and any learnings incorporated into our overall Quality Management System.

Delta is quality certified to AS/NZS ISO 9001:2008. First certified to ISO 9002 in 1994, our quality certification has been maintained continuously since.

Delta Quality Policy (PDF)

AS/NZS ISO9001:2015 (PDF)

Delta is Quality certified to AS/NZS ISO 9001:2015

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Delta is committed to continually improving its environmental performance and to the prevention of pollution.

We look for ways to deliver infrastructure that provides better environmental outcomes, from high-quality wastewater treatment and achieving environmental gold-certification for Dunedin’s landfill to recycling transformer oil.

Delta Environmental Policy (PDF)

Enviro-Mark® Gold Certification (PDF)

Delta has achieved Enviro-Mark® Gold Certification across its entire organisation. 

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