Enemalta Corporation has reacted to Denise Xuereb's letter 'Are you given less petrol than what you're paying for?' (The Sunday Times, November 16), by writing:

'1. By law, checking the calibration of station fuel pumps is the direct responsibility of the Malta Resource Authority (MRA). Nevertheless, until such time as the MRA has the necessary equipment and manpower, Enemalta Corporation as the supplier of fuel to petrol stations carries out regular checks to ensure fair trade.

2. Enemalta Petroleum Division technicians check station pump calibration on all petrol stations regularly. During the calibration check, the numbered seals on the pumps are checked to ensure that the pumps have not been tampered with.

3. Calibration of the pumps is carried out according to a standard procedure set by the Malta Resources Authority. The aim is to protect both the motorist and petrol stations and only a volume tolerance of plus or minus 0.5 per cent using specialised calibration cans is permitted. We invite Ms Xuereb to pass on any of her findings so that we can verify the information she supplies and, if need be, take appropriate action. Enemalta Corporation invites readers to report any suspected irregularity on freephone number 8007 2224.'

Ian Vella, PRO, Enemalta Corporation