Work was halted on a multi-million pound Aberdeen office and retail development after concerns were raised about health and safety.
Builders at the £107million Marischal Square, currently being constructed on Broad Street, were told to down tools on April 7 while a review was carried out.
A spokesman for builders Morgan Sindall said: “The day-to-day operation of busy city centre construction sites inevitably results in the generation of waste material.
“Our procedures relating to the safe storage and appropriate disposal of this material are reviewed regularly as a matter of course, as part of our ongoing commitment to prioritise safety on all of our sites.
“On Friday 7 April we took the decision to temporarily stand down the Marischal Square site in order to review and improve the arrangements in place for waste management and general site housekeeping.”
In February, work was stood down after a forklift truck collided with fencing on the site, prompting a review of operations.
A spokesperson for the Health and Safety Executive said: “We can confirm that concerns were raised to us.
“Contractors at the site below have agreed to improvements highlighted by the HSE when we visited the site in Aberdeen earlier this month.”
Aberdeen Central MSP Kevin Stewart previously raised concerns about waste being left around the historic Provost Skene’s House.
He said: “Anyone who wandered past over the Easter holidays may have seen for themselves what a sorry state Provost Skene’s House has been left in by this carelessness. “