CARDONE's Stormwater Runoff Project
Stormwater runoff is an important environmental issue because when the water from rainfall falls on impervious surfaces, such as roads, parking lots, buildings, rooftops and other similar surfaces, it does not soak into the ground. Because the stormwater is not absorbed into the ground, the runoff generated by rainfall on these impervious surfaces can create additional stress on urban stormwater sewer systems, as well as contribute to flooding issues in nearby streams and waterways. In addition, it can exacerbate pollution of those waterways, because the runoff can pick up and carry pollutants on paved surfaces, including nitrogen, phosphorus, bacteria, oil and grease, and pesticides and metals. In contrast, in a natural or undeveloped environment, rainfall from storms is absorbed into exposed soil and “cleaned” as it moves through soil layers and into the water table.
Recognizing that our corporate headquarters is located on a 60 acre parcel of land with a significant amount of impervious surfaces, CARDONE made a commitment to implement a comprehensive stormwater management system for the facility. Following months of planning and cooperation with the City of Philadelphia and the Philadelphia Water Department CARDONE began to implement the system in March, 2013.
Now complete, CARDONE’s stormwater management project is the largest stormwater project undertaken in the City of Philadelphia to date. Through the project, over 2.6 million square feet of impervious areas are being treated for stormwater mitigation throughout the facility. The new system will be able to manage up to 1.38 inches of stormwater per storm, which exceeds the existing standards in the City of Philadelphia of 1 inch per storm by nearly 40 percent. Through this new stormwater management system, CARDONE will be able to hold approximately 5 million gallons of stormwater in on-site cisterns that will be released incrementally into the city’s stormwater system.
The project was no small undertaking, requiring the movement of over 17,000 cubic yards of earth, installation of over 5,200 feet of pipe and laying over 12,000 tons of stone. Because CARDONE is committed to local and sustainable business practices, we estimate that 83 percent of materials purchased for the project were sourced from Philadelphia suppliers or Philadelphia-based companies. In addition, 75 percent of the disturbed earth and material from parking lots have been recycled for other uses at the facility.
While significant in its own right, this project is just a part of CARDONE’s broader and ongoing commitment to clean water issues and environmental sustainability.