Feel Free To Contact Us Cathy W. Dougherty, PE, CRS, CAPM President, Principal Engineer Rowlett, TX 972-412-8666 x122 cdougherty@dsei.com John T. Dougherty Senior Project Manager Rowlett, TX 972-412-8666 x127 jdougherty@dsei.com Paul W. Heidgerd, PG Sr. Geologist, Asbestos Individual Consultant Rowlett, TX 972-412-8666 x126 pwheidgerd@dsei.com