Quinn Stood Down After Test Failure Richard Quinn missed his five booked riders at Salisbury yesterday after being stood down by the stewards for failing a breathalyser test.The jockey took a total of five tests, four of which gave a reading above the permissible threshold of 17 micrograms of alcohol per 100 millilitres of breath.None of the tests produced a result above the drink-driving level of 34 micrograms, which means Quinn´s offence features at the lower end of the Jockey Club´s scale.Quinn was cautioned over the incident by the stewards after they found him in breach of rule 66 (vii) concerning banned substances.The jockey said: 'I did have a few drinks on Wednesday night but I haven´t eaten anything today.'It´s very hard for us jockeys. I´m still shocked.'A reading of between 17 and 34 micrograms usually results in a caution for the rider while a result of 35 micrograms or above is dealt with more severely.The Jockey Club´s director of regulation Malcolm Wallace described Quinn´s positive test as a 'borderline' result.'Thirty-two jockeys were tested today before racing. They are given something called a no-go test which registers either a green or red light,' said Wallace.'Richard Quinn was the only jockey to receive a red light.'He was then given a further breath test on an alcometre, similar to that used by the police.'It´s a borderline result in the opinion of the experts. A reading of below 17 micrograms is not sufficient to have any effect upon a riders performance.'(C) PA Sport