Combination above grade automatic stormwater separation filtration system and method of separation and filtration

A system for treating stormwater runoff containing impurities comprising:

• a collection basin for receiving said runoff containing said impurities;
• an above basin grade means for filtration of collected runoff within said basin, said filtration means further comprising:
• at least one drain pipe having an inlet in a top side of said drain pipe and discharging filtered runoff only outside said collection basin;
• at least one filter canister having a first upper, capped end and a second, lower discharge end and at least one input port for passage of unfiltered runoff from said basin to the inside of said canister, said canister having an internal filter media in said inside of said canister;
• and a discharge port in said second lower end of said canister in fluid communication with said inlet in said top side of said drain pipe for filtered runoff water inside said canister to enter into said drain pipe for discharge outside said collection basin;
• a separator member disposed floatingly about said canister between said input port and said impurities floating on the surface of said unfiltered runoff, said separator member further comprising a cylindrical wall member extending entirely around said separator member above said surface of said unfiltered runoff,
• said filtration means activatable after a predetermined controllable sedimentation period.