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Remove the pump cover. Using a scraper, clean around the edges of the pump making sure none of the debris drops into the pump and adds to the toxic mix. Dispose of the debris immediately. Don't use a vacuum, which can risk spreading the toxic odor.
Clean the pump cover. Use water and vinegar to clean and deodorize. Use the same vinegar and with a garden hose, flush out the inside of the sump pit. Turn on the pump drain and repeat.
Replace the clean pump cover. Seal with self-adhesive gasket around the cover then drill into place. Add a plastic cap and seal using a caulking gun.
First clean the area by sweeping up any loose debris. Open any windows and/or doors for ventilation.
With the enzymatic cleaner in hand, spray the entire floor surface. Make sure to get good coverage around the entire area.
Allow the cleaner to soak into the concrete floor. To prevent the cleaner from evaporating too quickly, cover the area with a plastic drop cloth.