RTCA helps you grow your business by listing you in our referral network database linked on our website’s home page.  We automatically list you as a professional upon completing RTCA’s online training program. You may also be added to the database if you email info@rtca.com, with the subject “referral network addition request” and attach your NRSB or NRPP certification documentation.  RTCA encourages you to use this as a marketing tool to promote your radon testing services.