Democratic presidential candidate Bernie Sanders speaks to supporters at Solano Community College rally on June 3, 2016. (Robinson Kuntz/Daily Republic file)

FAIRFIELD — The Bernie Sanders presidential campaign left behind more than $10,000 in unpaid bills for public safety services at rallies in Solano County before the June 7 Democratic primary election, local agencies say.

Keith Martin, chief of the Cordelia Fire Protection District, said Friday that the county Office of Emergency Services asked the fire district to assist at an event where heat led to four medical responses.

Costs for staff and equipment at the June 3 event at Solano College total $2,351 and Martin said he emailed an invoice to three addresses connected with the Sanders campaign and received a single response.

That message said his email would be forwarded but the fire district hasn’t heard back and hasn’t been reimbursed, the chief said.

“I don’t know if the district will participate next time,” Martin said of future campaigns. “I think we’re going to make sure we get everything in writing.”

He’s not optimistic about the fire district seeing the money he said is due from the Sanders campaign.

Mark Mazzaferro, spokesman for the city of Vacaville, said sending police officers to the Sanders rally in Vallejo cost $7,718.

Matthew Davis, spokesman for Solano County, said the campaign has not paid the $22,193 in costs for the Sheriff’s Office to provide security for the Fairfield and Vallejo rallies.

Solano County has sent two invoices to the Sanders campaign and was part of a visit to the offices of Rep. Mike Thompson, D-St. Helena, about the unpaid costs. Thompson sent a letter to the Sanders campaign about the bills, Davis said.

None of the county efforts have resulted in a response from the Democratic presidential candidate’s campaign, Davis said.

Solano County Supervisor Monica Brown, who is on the executive board for the California Democratic Party, said Friday she is disappointed to learn about the unpaid costs local agencies incurred.

“I don’t like that,” Brown said. “We need to pay our bills.”

Brown said she will use her own email to try to contact the Sanders campaign about the money due agencies here.

A Sanders campaign representative could not be reached Friday for comment.

Reach Ryan McCarthy at 427-6935 or [email protected].