Share: GovernmentNonprofit OrganizationConsultantsCounseling Norcal PTAC Visit Website 1 Hapst St. Bldg 71 Arcata, CA 95521 (707) 267-7561 Facebook Instagram Hours: Monday- Friday 9am-5pm About Map About Northern California Procurement Technical Assistance Center (Norcal PTAC) mission is to help small businesses build their government contracting capacity, free of charge. Directions HSU Campus (Library Circle) What's Nearby? Distance: 5 10 15 20 25 50 mi.