See if their equipment looks well-maintained or old and beat up. Their equipment is a representation of their company and how they clean. Make sure their filtration unit is big enough for a cleaning of a parking structure as well. Most garages of 300,000 square feet will have more than 50 to 300 gallons of sludge. If their filtration unit has a capacity of 60 gallons, then most likely it is undersized for the job.
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Top Tips for Reducing your Carbon Footprint. 1  1. Foodâs Carbon Footprint: Eat vegetarian. 2  2. Foodâs Carbon Footprint: Bring back home-cooking. 3  3. Foodâs Carbon Footprint: Cooking smartly. 4  4. Foodâs Carbon Footprint: Eat Organic. 5  5. Foodâs Carbon Footprint: Save water. 6  6. Foodâs carbon Footprint: Shop wisely. 7  7. Foodâs Carbon Footprint: Shop local.