Complex sentence: Dr. C. Rexford Upp, PhD, president of the Association of Environmental and Engineering Geologists, did a lengthy independent investigation, and delivered his findings as the president's lunchtime address to his association's annual meeting in Colorado.
Split into simpler sentences: Dr. C. Rexford Upp, PhD, president of the Association of Environmental and Engineering Geologists, did a lengthy independent investigation. Dr. Upp delivered his findings as the president's lunchtime address to his association's annual meeting in Colorado.