Permeable pavement surfaces typically include pervious concrete, porous asphalt, paving stones and interlocking pavers. Surface runoff in hydrologic systems is generally conceptualized as occurring from pervious and impervious areas. Some surface options are open joint pavers, porous asphalt, pervious concrete, or a turf grid. To prevent reduction in permeability, pervious concrete needs to be cleaned regularly. This type of soil is highly pervious and have a low density. This photocatalytic pervious composite showed 98% reduction in total coliform bacteria immediately after filtration. Recent research has shown that this effect has not been observed in relatively pervious areas. Famously, numerous pervious monsters from Toho's library of Kaiju made appearances in the series. Pervious concrete can also reduce the impact of development on trees. Pervious concrete has been tested up to 4500 psi so far. Pervious concrete quality depends on the installer's knowledge and experience. Pervious concrete is made using large aggregates with little to no fine aggregates. Pervious concrete has a common strength of though strengths up to can be reached. Advanced Framing, Electrical Systems, Pervious Concrete, Paint, Solar Panels, Plumbing, and Quality Control. Pervious concrete lowers the sites SCS Curve Number by retaining stormwater on site.