A council report said the annual cost to each of the city’s 81,000 properties would be 43.97, giving a contract worth 3.56 million.
The city produces about 68,000 tonnes of waste each year.
The contract will include kerbside collection of domestic and trade waste, and dry recyclables. It is due to start in October, when the council’s temporary arrangement ends with Amey.
One key factor that swung the deal in Onyx’s favour, was its offer to provide a large fleet of new vehicles, including a high proportion of narrow-bodied vehicles suitable for use in urban streets.
The report said that the lead-in time for the delivery of new vehicles was important as, “past experience suggests that vehicle suppliers are notoriously poor at meeting delivery dates”.
The council report also noted that Onyx, “recognises the importance of the role of the operatives in carrying out the service.”
“Work schedules have been designed to enable greater care and attention to be given to the collection and removal of waste by reducing the daily quota of waste each operative has to collect,” it said.
The council originally intended to sell its commercial waste service to SITA. But this was abandoned after it received an offer from Onyx, “which results in financial benefit to the city over the contract period”. Serviceteam also bid, but was unsuccessful.
It said the Onyx deal also gave benefits through integration with the waste treatment and disposal service, including recycling, which is already provided with Hampshire Waste Services, itself part of Onyx.
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