The Maryland Racing Commission appointed a blue-ribbon committee yesterday to ascertain the tolerances of drugs that will be allowed in thoroughbreds after the drugs Bute and Lasix are banned March 15. Most states allow a residue or small trace of a banned drug.

Chairman Robert Banning appointed Commissioner Kenneth C. Proctor to chair the meetings, the first of which will be Feb. 21 at Bowie Race Course.

Appointed to the committee by Proctor were J. Fred Colwill, a steward; David Price, state veterinarian Thomas Lomangino, state chemist; Fendall Clagett, a horseman; and Robert Valance, a practicing veterinairan. f

"This is a good cross section of racing and we'll work out an agreement by the deadline," said Proctor.

Clagett, however, was not so sure.

"Those machines of Lomangino's are breaking down and are suspect. Also, I and other horsemen question whether Lomangino and his son can properly process as many specimens as are sent them with such a small staff," he said.

Banning ruled Clagett out of order.

In other commission business, the appeals of owners Hal C. B. Clagett and Gustave Ring to rescind the order of the stewards that disqualified their horses for infractions of the drug rules were disallowed.

Meanwhile, the Maryland stewards officially suspended groom Edgar Wendell Lane for 10 days retroactive to last Thursday "for failure to comply with an order of the stewards to allow the search of his vehicle, room and person, pursuant to an ongoing investigation of the track police."