Dairy Effluent Management: Right Amount at the Right Time
Good effluent management on a dairy farm combines a well-designed system with proper processes to ensure the right amount of effluent gets applied to pasture at the right time.
Two farm workers have been fined $24,700 for breaching effluent management rules.
A Opotiki dairy farm manager and senior farm assistant were found guilty of breaching the Resource Management Act after a week-long trial earlier this year.
An effluent irrigator failed and discharged waste into a nearby drain. Charges were also laid against the landowner and consent holder, who was previously found guilty and fined $30,000 for the same offences.
The failure happened on October 18, 2016, the same day a Bay of Plenty Regional Council compliance officer was doing a dairy inspection at the property. The officer arrived to find the irrigator located within spraying distance of a spring-fed drain. He also saw signs of effluent having flowed over the bank and into the drain which flows into the Waiaua River, and on to reach the coast about 10km east of Ōpōtiki.
A water sample taken from the receiving drain on the day of the event found the water had a high faecal coliform reading of 64,000 per 100ml -- 640 times higher than the recommended maximum level for safe stock drinking water.
Regulatory compliance manager Alex Miller says it’s well known that effluent irrigators, if not managed properly, can endanger the health of waterways.
“In this case the irrigator was placed close to a waterway, despite conditions in the resource consent prohibiting it. Once the irrigator was turned on, a mechanical failure occurred and, without fail safes on the irrigator, it stayed where it was. This led to the effluent building up and running down the bank into the drain,” says Miller.
“While not intentional, this case serves as a reminder that farm staff must be aware of the environmental risks with equipment. They must take the necessary steps to avoid situations like this, particularly when using outdated equipment,” says Miller.
Environment Court Judge David Kirkpatrick noted that the farm worker was “careless to a relatively high degree”.
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