Two people are under arrest after $20,000 worth of copper was stolen from the construction site of Portland's new Homeless Services Center.Police were notified of two people exiting the site on Riverside Street around 11 p.m. on Monday.When they arrived, officials say they heard noises from a nearby section of the Portland Trails trail system. According to authorities, Edward Demers and Chayne Markie of Portland were pushing wheelbarrows loaded with copper that had been stolen from the site.An officer checking nearby businesses found a pickup truck in the parking lot of Waste Management. The truck, belonging to Markie, contained several battery-powered tools belonging to the company at the construction site, officials said.Portland police say in addition to the $20,000 worth of copper, the tools were estimated to be worth $8,500.Demers and Markie are facing charges of burglary, felony theft, criminal mischief and refusal to submit to arrest.