08/20/2005 12:00AM

Miyadi penalized for overage

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Northern California trainer Steve Miyadi's starters will be placed in a 24-hour detention barn before their races until late September after one of his runners exceeded the permitted level for carbon dioxide at the Solano County Fair in Vallejo, Calif., on July 23.

Tests taken from Go Bon revealed the excessive level, according to a statement released Saturday by a consortium of racetrack and racing officials. Go Bon won the fifth race on July 23, a sprint for $16,000 claimers.

Effective Saturday, Miyadi's horses were required to be placed in a 24-hour detention barn in advance of their starts. After 30 days have passed, Miyadi's starters will be under surveillance for another 15 days.

Carbon dioxide testing has been conducted in California since the beginning of the year. Tests that reveal readings higher than 37 millimoles of carbon dioxide per liter of plasma are considered to be in excess of the permitted levels.

Last week, Louisiana-based trainer Cole Norman was informed that one of his horses who raced at Del Mar in late July had tested positive for an excessive level of carbon dioxide. Norman has been banned from entering a horse in California for one year. Earlier this year, five other trainers in Southern California had horses test in excess of the permitted levels.

The consortium of racetracks and racing officials conducting carbon dioxide testing in northern California includes the Thoroughbred Owners of California, the California Thoroughbred Trainers, and the California Authority of Racing Fairs.