Please Contact us to Arrange a Safety Inspection. Address： 246 N. High St. , Columbus, Ohio 43215. Columbia Gas must perform a safety inspection at the address above. We are required by federal law to inspect your service line and meter setting. Please call us at 1-800-344-4077, Monday through Friday, 7：00 a. m. -7 ：00 p. m. If you have already arranged an inspection, there is no reason to call. Please ignore this letter. Please understand, communications will continue until the inspection has been completed. This important safety inspection is part of our promise to provide safe and reliable service to our customers. We will make every effort to do the work at a date and time that is convenient to you. If this inspection is not performed, we cannot continue your service. Please call us today to set up an inspection. Thank you for your attention to this letter.