Blood tests show that a Southern California Assembly member arrested on suspicion of drunken driving while traveling with a female lobbyist in March was legally drunk when he was stopped, police said.

Concord police said Wednesday the tests showed that Assemblyman Roger Hernandez, 36, of the 57th District based in West Covina, had a blood alcohol content of 0.08 percent, the minimum level for DUI in California. Investigators have presented a misdemeanor case to prosecutors.

Hernandez, a Democrat and assistant majority whip named Freshman Legislator of the Year following his 2010 election, told reporters after the March 27 arrest that while he had consumed wine with dinner, he was not drunk and that police did not have probable cause to pull him over.

After the test results were released Wednesday, he offered more sobering words.

“The results from the blood-alcohol test released today are a huge wake-up call for me. I may have made a poor judgment, thinking that I was sober enough to drive after a couple of drinks over the course of an evening,” Hernandez said in a prepared statement. .

“I look forward to fully looking into the specifics of the test for more information. I hope that others can learn from how dangerous it could be to drink any amount of alcohol prior to driving, as I have,” he continued. “I offer my sincerest apologies to the constituents that I serve in the 57th Assembly District, to my family, colleagues and staff for any embarrassment I may have caused.”

Last week, it was revealed that the state-issued car Hernandez was driving was not supposed to be used outside Sacramento without permission. Hernandez conceded the violation and voluntarily gave up his state car privileges.

A 29-year-old woman since identified as a Kaiser lobbyist was riding with Hernandez, but Assembly officials said there are no rules covering after-hours socializing between legislators and lobbyists.

Hernandez was visiting the Bay Area when he was stopped by Concord police about 2:05 a.m. March 27. An officer reported that Hernandez was weaving and not using turn signals while traveling on Concord Avenue near Meridian Park Boulevard.

The officer pulled over Hernandez’s state-issued white Toyota Camry in the parking lot of the Crowne Plaza Hotel and reported that Hernandez showed signs of intoxication.

Hernandez refused a Breathalyzer and was given a field sobriety test, after which the officer arrested him on suspicion of DUI. A blood test was taken at the Concord Police Department and Hernandez was taken to County Jail in Martinez and released.

The lobbyist riding with Hernandez was released at the scene.

The Los Angeles Newspaper Group contributed to this story.