It's unfortunate but unless a Parking Enforcement officer catches them in the act of of having the commercial vehicle onsite when officer the visits, there's not much that can be done. They cannot give citations out based on a picture. They have be caught in the act.

Code Enforcement may be able to assist since you provided an address. However, CE requires reporting party name and contact number to confirm the issue still exists before they send a warning letter out to the violators.

This info is kept confidential per Code's website. The info is needed to verify that issue is ongoing. If it's not, then no officer would be sent. If it's still occurring, an officer inspection will follow. The contact number is also need to verify that the issue is no longer occurring after the site inspection.

Here is the link to their investigation process: http://www.code-enforcement.saccounty.net/Programs/Pages/ReportViolation.aspx