The horizontal scrollbar is being caused in part by the absolutely positioned desktop images:
<img class="vc_single_image-img attachment-full" src="http://melindcooper.com/BCT/wp-content/uploads/2019/03/project.png" alt="" srcset="http://melindcooper.com/BCT/wp-content/uploads/2019/03/project.png 800w, http://melindcooper.com/BCT/wp-content/uploads/2019/03/project-768x761.png 768w" sizes="(max-width: 800px) 100vw, 800px" height="793" width="800">
<img class="vc_single_image-img " src="http://melindcooper.com/BCT/wp-content/uploads/2019/03/people-700x705.png" alt="people" title="people" height="705" width="700">
Companies like to use frameworks such as bootstrap to make their code as consistent and as functional as possible. Unfortunately, the intent falls apart when their coders are more familiar with JS than with HTML/CSS and bootstrap. The amount of JS being called on this page is obscene. This page is 98% read only. It could be written almost entirely with HTML and CSS and woruld perform brilliantly.
I expect my suggestion to fall on deaf ears, but I would recommend turning off JS and rewriting the page, then add JS to enhance the page rather than to control major elements.