Workers in Metro Vancouver have chiselled away about 50 tonnes of so-called B次元官网网址渇atbergsB次元官网网址� that have clogged the sewer system and prompted a reminder to residents not to dump grease down the drain.

Dana Zheng, a program manager with the Metro Vancouver regional district, says that while it isnB次元官网网址檛 the first time theyB次元官网网址檝e encountered the problem in the system, this latest discovery of hardened fat is the B次元官网网址渕ost seriousB次元官网网址� they have seen in recent years.

Zheng says workers at the Lulu Island wastewater treatment plant in Richmond have been running into the giant mounds of fat since the summer, gradually extracting more than 50 tonnes in total, and costing about $1 million so far.

A photo issued by the regional district shows some of the hardened chunks of yellowish and brown fat are large enough to reach a workerB次元官网网址檚 thighs.

Zheng says Richmond has been one of the hot spots for fat deposits because of the cityB次元官网网址檚 flat terrain, giving grease more time to settle and harden inside the pipes.

The regional district is urging residents to dispose of fats properly by placing them in green bins for composing, rather than pouring them down the drain.

The districtB次元官网网址檚 website says Metro Vancouver municipalities spend about $2.7 million every year to repair damage caused by fats, oils and grease in the sewer systems.