Talk to any superintendent in Oakland, Hayward, or San José and the story is the same: the site was fine at 5:30, and by 6:30 the next morning the copper was gone, a generator was missing, or the fence had been cut and a container pried open. Jobsite theft isn't random. It happens in the hours between the last truck leaving and the first crew arriving, and it targets what's easiest to sell.
The short list of targets rarely changes: copper wire and pipe, power tools left in gang boxes, generators and compressors, fuel, appliances staged before install, and lumber. Thieves watch sites during the day, note where materials are staged and where the lighting is weak, and come back when the site is empty.
Cameras help with insurance claims, but they don't stop the truck that's already backed up to your gate. A uniformed officer on site changes the decision before it's made. Officers who walk a logged route check fencing and gates, verify containers are locked, log anyone who approaches the site, and call police the moment something is off.
The most effective coverage is built around the site, not a package. That means walking the site with the superintendent, identifying where high-value materials sit, matching hours to real risk (weekend nights are usually the worst), and agreeing on who gets called when. Written post orders and a morning shift report keep everyone honest.
If your site has been hit or you're about to stage expensive materials, the time to arrange coverage is before the weekend, not after. Security Perú Services can usually walk a Bay Area site within a day and have officers on post by the next night.