DECISION AND ORDER On May 28, 2019, construction workers were erecting a building in Hoover, Alabama, using structural insulated panels. A structural insulated panel (SIP) is a precut panel composed of an insulating foam core sandwiched between two layers of engineered wood. A compliance safety and health officer (CSHO) for the Occupational Safety and Health Administration drove past the worksite and saw what he believed were unsafe conditions. He stopped and conducted a safety inspection of the worksite. He interviewed Zachary (Zac) von Allworden, whom the CSHO believed worked for SIP Insulation Professionals, LLC (SIP, LLC). The Secretary issued a three-item Citation and Notification of Penalty to SIP, LLC, on October 9, 2019.