A. Perform low pressure washing using cold and/or hot water on vertical, horizontal and overhead surfaces including concrete, brick, metal, asphalt and other materials suitable for pressure washing as requested by the City. B. The pressure washing equipment shall effectively clean the specified surfaces without causing damage, such as etching, displacing sand bedding, or exposing coarse aggregate. C. All pressure washed surfaces shall be free of gum, algae, moss, oil and accumulated dirt and stains. Any debris removed during the process shall be properly disposed of, ensuring that surfaces are left clean and free of residue. D. Pressure washing shall be performed using water or steam only. No chemicals shall be used unless pre-approved by the City’s designee. If a cleaning agent is deemed necessary, it shall be non-toxic, biodegradable, phosphatefree, and approved by the City. Safety Data Sheets will be required. E. Water from the cleaning process may be discharged into storm drains; however, the Contractor shall use filter fabric or similar filtering materials in or around each drain to prevent debris from entering the system. The contractor shall comply with City of Clemson Stormwater Management Guidelines. Please see Exhibit B Approved Pressure Washing Chemicals List for details.
