David started his experience in environmental issues back in the late 80’s and early 90’s in the west side of Los Angeles and Orange County areas by doing stone work and environmental indoor air quality inspection. (David was one of the top indoor air quality inspectors in Southern California). During that time David also studied the geological properties of stone to determine why and how installation should be done and how to fix the stone or tile that has been installed incorrectly, coming up with procedures to refinish and protect natural tile and stone. His concern for the environment was the drive behind hosting a cable talk show (Environmental Concerns with David Bonasera) for ten years raising questions on bay area issues with local citizens and politicians.

David’s experience and passion for stone has brought him to not only to be a national speaker as a tile and stone consultant, he is also an investigator and volunteer at the Cal State board of contractors with others writing the test for the C-54 test (Tile, stone and fabrication areas).