During warmer months, heat from warm air is transferred to the heat exchanger and into the fluid. As it moves through the pipes, the heat is dispersed to the rocks, soil, and groundwater. The pump is reversed during the colder months. Heat energy stored in the relatively warm ground raises the temperature of the fluid. The fluid then transfers this energy to the heat pump, which warms the air inside the building.
While individual states generally govern how long medical records are to be retained â HIPAA. rules require a Medicare Fee-For-Service provider to retain required documentation for six. years from the date of its creation or the date when it last was in effect, whichever is later.
Age-discrimination documentation (ADEA) - keep payroll records for at least three years, and any other documents relating to personnel actions for at least one year, or during the pendency of a claim or lawsuit. OSHA records - keep OSHA-related records for at least five years. Hazardous materials records - keep these for at least thirty years following the date of an employee's separation from employment, due to the long latency period for some types of illnesses caused by exposure to hazardous materials.