THIEVES raided South Holland District Council’s West Marsh Road depot in Spalding for the second weekend in a row, making off with diesel worth £2,000.
Ten refuse trucks were targeted overnight Friday/Saturday and police want witnesses to call them on 101.
Fuel worth £1,400 was taken the previous weekend.
Coun Roger Gambba-Jones, who holds the portfolio for waste management, said the council is looking at new security measures.
The depot is covered by CCTV, has a high fence and good lighting.
He said a security firm was employed in the past but as officers left following their round, the thieves moved in behind them, and full-time on site security would cost far more than the value of the stolen fuel.
Coun Gambba-Jones said: “At the end of the day they are robbing the local taxpayers.”