VIDEO: Police in race against time in the search for remains
POLICE face a race against time to remove more than 100 cubic metres of soil in a bid to locate Sharron Phillips' remains before the big wet forecast for this weekend.
Police are searching two 35-metre concrete drains running underneath Cobalt Street at Carole Park after a new witness came forward in the past fortnight with credible information about the cold case.
The region has been declared a crime scene.
There are about 50 officers at the site and one of the two tunnels has already been cleared of soil and debris.
The second tunnel is expected to be cleared later today.
Soil from the drains is being removed via hand and taken to a nearby storage area where it will be painstakingly sifted through.
The mounds of soil at the storage area have been numbered so investigators can determine the exact location inside the drains where they were removed from.
A police officer at the scene told the Queensland Times the fact the drain contained so much soil and debris which had built up over three decades was playing in their favour.
They said a hydrologist had told investigators the drains were not flow through drains which carried large volumes of water.
The officer said investigators were confident if Ms Phillips' remains were in the drains they would not have been washed away.
An anthropologist is also at the site to assist police should they make a discovery.
The witness, who had not been interviewed before, told police highly-specific new information which sparked the search of the two drains.
It is understood the information he supplied to police surrounded his father, who was a taxi driver, and may have been responsible for Ms Phillips' death.
The man allegedly told police his father accidentally hit Ms Phillips as she was walking along a road the night she disappeared.
He said his father then phoned him to ask for help to dispose of the body.
Police said aspects of the new information provided to them was able to be verified with information gathered in previous investigations.
Police said earlier this week the man had come forward with the information after his conscience got the better of him after seeing recent media reports.
The man told police his father passed away a number of years ago.
Ms Phillips, 20, disappeared on May 8, 1986 after her car ran out of petrol on Ipswich Rd about 11pm near Wacol.
She had called her boyfriend from a service station and asked him to pick her up but when he arrived, she was gone.
Ms Phillips has not been seen or heard from since and is presumed to be dead.
No one has been charged over her death.
The new search area was dense bushland popular with motorbike riders at the time Ms Phillips went missing.
It is located less than 10km from where she went missing.