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 It's tough to balance the demand for development with the need to preserve our natural resources.         However, this balance becomes easy to achieve when you construct parking lots using pervious concrete.

              Using pervious concrete pavement in your parking lot can reduce the need and costs of underground storage / filtering systems, large detention ponds and in some cases the entire storm drainage system because the pavement acts as a detention area. The SMART business choice!

The EPA considers impervious streets and parking lot surfaces to be the primary source of strom water pollution in urban areas. The deposition of certain chemicals by cars on parking surfaces continue to generate pollution in the form of metals, oil and grease, solvents, phosphates, hydrocarbons and suspended solids. The first flush following the initial rains of each season cause these pollutants to enter our streams, creeks, lakes and ponds. Pervious Concrete built with a "two-stage" system, as reviewed by the Federal EPA, reduces these pollutants by up to 90%.

Pollutant removal is largely regulated bobial actiy microorganisms. The biota acts as a major stabilization, removal, and conversion mechanison for organic carbon and many nutrients. Due to flow fluctuations over the year, some biological action is fractulative (both aerobic, [air breathing] and anaerobic depending on the seasonal conditions).

Microbial action converts or transforms many substances into insoluble or harmless substances, and positively changes the reduction/oxidation (redox) increasing the processing capacity of the soil to remove pollutants. In submerged soils, water replaces the air in the void spaces and microbial action rapidly consumes the residual air. Microbial action changes from aerobic to anaerobic and the soil becomes anoxic (without oxygen). This soil area than becomes a reducing environment, which is important for removal of pollutants such as nitrogen and metals. The establishment of a healthy biological colony may be the most important aspect of the construction.

 Do you want to help our waterways?

Think PERVIOUS ... Think Green!

   In addition, impervious surfaces are being placed by the hundreds of acres, causing more rain run off to be discharged to our storm drainage systems rather than retaining that valuable resource to recharge our groundwater aquifers. The United States Geological Survey states that a 1" rainstorm falling on only one acre of impervious surface will create 27,154 gallons of unrestrained water.

How big is the parking lot you parked in this morning?

When we build on previously native land, we substantially deplete or interfere with the groundwater recharge that could net a deficit in aquifer volume or a lowering of the local groundwater table level.                 

You CAN add additional parking spaces in environmentally sensitive areas, ask your engineer for details!

                         If you need to satisfy environmental requirements, ask your engineer for help here too!

The answer is pervious!

LEED credits / points may apply, try for a Gold Certificate!

Click here for thoughts about design and hydrology

  

 

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