Remove the old cartridge, install new cartridge and new seals per. Kohler recommendation, test for any issues. Techs arrived onsite to install new cartridge on clients Kohler faucet in kitchen sink. Techs successfully removed handle and old cartridge. Techs inspected unit to ensure no damage and good working order. Techs found only issue to be with old corroded cartridge. Techs installed client supplied Kohler cartridge and reinstalled handle. Techs cleaned sink and surrounding area. Techs tested install to ensure proper operation. Techs displayed work to client and offered assistance with any other projects. Client was happy with work performed and payed with a check for the amount due. Techs cleaned tools and work area, collected signatures, and pulled off.