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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I produce amount of waste, most of which is . This calculator is developed and hosted by Anthesis Group. We helped develop the concept of the ecological footprint back in the 1990s. If you want to know more about how to reduce impact, check out our ideas and insights. If you like learning about footprints, you might enjoy our infographics.