theTelegraph wrote:Eight trucks owned by the company have been tampered with, police say.
Traffic and Highway Patrol Commander John Hartley said seven of the trucks allegedly had been modified to exceed the maximum speed of 100km/h.
Another vehicle had allegedly been tampered with to increase fuel consumption.
One driver was allegedly caught with cannabis and another driver was charged with exceeding maximum daily driving time and will appear in Goulburn Local Court.
"This is a small part of the industry who have certainly systemically done the wrong thing, we allege,"
Assistant Commissioner Hartley told reporters in Sydney.
"And the fact is that police and the Roads and Maritime Services (RMS) are now investigating fully the company to see what other action we can take against that company and its drivers if they've committed offences."
RMS regulatory services director, Peter Wells, said tampering with trucks to exceed maximum speeds was well-known in the industry.
Mr Wells said the RMS has been investigating Lennons since the crash, but would not reveal if the service became aware of the alleged offences before the fatal collision.
"We've been looking at this for a while," Mr Wells said.
Lennons declined to comment.
Police also said a Lennons truck was found in bushland in Victoria around 11am.
The driver was nowhere to be seen, however, officers located a log book in a rubbish bin.
A police spokesman said inquiries are now being made to locate the driver and tow the truck back to Sydney for examination.
The Telegraph revealed earlier today the Lennons depot at Enfield was in lockdown, with dozens of police inside looking over the company's 40-strong fleet.
It is understood they were checking truck compliance.
Police arrived at the Madeleine St complex just before 6.30am.
Staff were directed out of the shed spaces and office areas while police search the place.
Police are also investigating trucks from the company at checking stations across New South Wales.
Two trucks have been stopped at Marulan and one on the Hume Highway at Albury.
This phase of the operation will continue to track down the other 24 company trucks still on the state's roads.
Police in Queensland, South Australia and Victoria have been alerted to intercept all trucks within the fleet to check for safety breaches.
Assistant Commissioner John Hartley, said today's unprecedented operation was a significant warning to the trucking industry.
"We are determined to send a clear message to truck operators [in relation to] safety regulations across the state," Assistant Commissioner Hartley said.
"Transport companies must follow safe work practices, they have a responsibility to the motorists of New South Wales," he said.
"This investigation has only been made possible through the close work between officers from the Traffic and Highway Patrol Command and investigators from Roads and Maritime Services."
On the company's website, boss Tony Lennon has posted a statement in relation to the triple fatal accident.
"As this incident is under investigation by the police, I am obviously unable to comment on the accident itself but I would like to express our deepest sympathy to the families involved in this very tragic accident," the statement reads.
Separately, the truck driver allegedly involved in a horror smash at Menangle last month which claimed three lives has been charged over the deaths.
Police late last night located Vincent George in Tamworth, and charged him with three counts of dangerous driving occasioning death.
His licence was also suspended.
The charges relate to the deaths of Donald and Patricia Logan, both 81, and their son Calvyn, 59.
Police said George, 33, was driving a semi-trailer on the Hume Highway on January 25, when he allegedly crossed to the wrong side of the road and collided with the Logan's car.
The Logans were on their way to Sydney after a trip to Canberra to visit a newly born great grandchild.
Police said George was arrested in Tamworth last night, where he was staying with family.
He is due to face court on May 16.
I'm shocked that one of the best trucking companys would be so stupid to do this!