Home / phone & address   How to Reach Us by Phone 303-469-8042 Toll Free 1-800-282-6574 How to Reach Us in Person Feel free to come by our lobby location: Denver Location: 4895 Joliet St., Unit 7G Denver, CO 80239 Mon. - Fri. 8:00 a.m. - 5:00 p.m. Sat. - Sun. Closed How to Reach Us by Mail : PO Box 39789 Denver, CO 80239-0789 How to Reach Us by Internet : Go to our website, forensiclaboratories.com, click on contact us from the navigation bar, choose send comment and send us your message. How to Reach a Toxicologist : 303-469-8042, Ext. 111 Toll Free 1-800-282-6574, Ext. 111 How to Reach a Chemist : 303-469-8042, Ext. 111 Toll Free 1-800-282-6574, Ext. 111 How to Reach Client Services : 303-469-8042, Ext. 104 Toll Free 1-800-282-6574, Ext. 104 How to Reach Sales/Marketing : 303-469-8042, Ext. 103 Toll Free 1-800-282-6574, Ext. 103 How to Reach HR/AR/AP: 303-469-8042, Ext. 101 Toll Free 1-800-282-6574, Ext. 101