Judea industrial sites show low risk of stormwater contamination
3 November 2014
Recent audits of Judea Industrial sites has shown that most sites have a good understanding of stormwater issues and are
taking steps to manage their environmental effects.
The Regional Council undertook stormwater pollution prevention audits of all Judea Industrial Estate businesses with
Tauranga City Council’s Pollution Prevention officers in August to determine if contaminants were likely to pollute the
harbour through stormwater runoff.
Regional Council Pollution Prevention Manager Nick Zaman told the Council’s Regional Direction and Delivery Committee
meeting last week that the audits focused on all businesses in the estate where stormwater runoff entered the
Kopurererua Stream, Waikareao Estuary and Tauranga Harbour. Stormwater was not treated before it was discharged.
A total of 157 street addresses, many with multiple business premises, were visited. Of these, 87 had a full stormwater
audit, focused on industrial processes, outdoor activities and stormwater drainage discharges. The other addresses had a
low risk of discharging contaminated stormwater due to the type of activities undertaken on the site.
One common issue was businesses that washed vehicles outside with wash water discharging directly to stormwater. Several
businesses, including automotive wreckers, a concrete batching plant, some spray painters, sand blasting booths and
automotive workshops already had Regional Council discharge consents.
In the 1950s the Judea Industrial Estate was already established on reclaimed swamp land, with several commercial timber
mills. The estate now supports a wide variety of industries and stormwater from the estate has the potential to directly
affect Tauranga Harbour’s water and sediment quality. The Judea audits were part of a region-wide Industrial Pollution
Prevention Programme, now in its sixth year.
The Committee heard that all the businesses were given recommendations to reduce the potential for contaminant
discharges, and some were required to take remedial action and report back to the Regional Council by the end of
November. Only one business was likely to require a consent as a result of the audits.
Once the inspections were completed, solutions were discussed with managers and staff of businesses where issues were
identified. Overall, potential issues were minor and would generally be easy for business owners to fix, he said.
They included a lack of spill response kits in some automotive workshops, storing fuels, oils and detergents outdoors,
no bunded storage areas for hazardous chemicals, vehicle washdown areas draining to stormwater, wood or stone cutting
and sanding outdoors with insufficient dust controls and a lack of trade waste connections and consents for process
water discharge.
Businesses washing vehicles had been asked to not use detergents and wash on grassed areas, rather than paved areas
which ran off into stormwater drains.
Followup visits are planned to ensure remedial measures have been implemented and are working.
Committee Chair Paula Thompson said it was gratifying to see that industrial premises in the city were aware that their
activities had an effect on the harbour waters and were taking steps to ensure they did not contribute to pollution.
Ends