Munger Bros. LLC, a blueberry grower, and two related companies will pay $3.5 million to resolve violations of the H-2A visa program, the US Department of Labor’s Wage and Hour Division announced Monday.

The companies are also enjoined for three years from participating in the H-2A program and using the services of H-2A labor contractors. They also face other restrictions, including an enhanced compliance monitoring program of their labor contractors.

Munger, along with Crowne Cold Storage LLC and Sarbanand Farms LLC, violated the H-2A program by unlawfully giving preferential hiring treatment to temporary foreign agricultural workers and for failing to recruit, contact and re-hire US workers, according to the department.

An investigation also found the companies failed to provide safe housing to the H-2A workers, pay workers the required rates of pay and provide safe transportation, the department reported. In addition, the companies used farm labor contractors to provide transportation services without being authorized, failed to provide workers with all the terms and conditions of employment and failed to keep accurate records of actual hours worked for all employees.

Of the $3.5 million, $2.5 million is in back wages to approximately 3,000 workers and $1 million is in civil money penalties. The incidents happened during the 2017 blueberry harvest season.