On-Site Engineering & Asphalt, Inc. Return to Directory Contact Kenneth A. Pinkham Address 3303 A Swetzer Road City Loomis State CA ZIP Code 95650 Business Phone 1 916 652-0600 Business Fax 1 916 652-0610 CSLB Number https://www2.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=851332 Specialty Excavating, Commercial, Grading, Commercial, Paving Contractors, Asphalt & Concrete, Sitework & Development, Underground Construction