ARE 5.0 – PPD exam with 100% Correct | Latest Updated Graded A+

SITE DESIGN: BLDG LOCATION/IMPROVEMENTS - ALL BLDGS DISRUPT DRAINAGE. ACCOMMADATE INCREASED RUNOFF. POSITIVE DRAINAGE AWAY FROM BLDGS. SITE DESIGN: DRAINAGE TYPES - ABOVE GROUND OR BELOW GROUND. ABOVE: PERVIOUS PAVING, SHEET FLOW, GUTTERS, SWALES, CHANNELS, AND RUNOFFS. BELOW: PERFORATED DRAINS, ENCLOSED STORM SEWERS TO CITY LINES OR TO NATURAL FEATURE SITE DESIGN: PAVING - MINIMUM SITE PAVING TO BE 1.5% ABOVE GROUND. BELOW GROUND 0.3% SITE DESIGN: UNDERGROUND ITEMS - STORM DRAINS COLLECT WATER FROM ROOF DOWNSPOUTS, DRAIN INLETS, CATCH BASINS, AND DRAIN TILES. DRAIN INLET: OPENING IN GROUND COVERED W/ METAL GRATE. CATCH BASIN: UNDERGROUND RESERVOIR THAT HAS A SUMP BUILT INTO IT, DEBRIS SETTLES SO IT DOESN'T CLOG PIPING. LARGE STORM SEWER SYSTEMS MUST HAVE MANHOLES. STORM SEPARATE FROM SANITARY SITE DESIGN: DRAINAGE SYSTEM REQUIREMENTS - BASED ON SIZE OF AREA TO BE DRAINED, RUNOFF COEFFICIENT, AND AMOUNT OF WATER TO BE DRAINED DURING MOST SEVERE STORM. COMMON TO USE 25 YEAR STORM. IF RUNOFF EXCEEDS UTILITIES A HOLDING POND MAY BE BUILT, COLLECTS WATER TO RELEASE AT CONTROLLED RATE.UTILITIES - CAN INCLUDE: SANITARY, STORM, WATER, GAS, ELECTRICITY, STEAM, TELEPHONE, INTERNET, CABLE. SANITARY/STORM TAKE PRECEDENCE B/C THEY NEED GRAVITY TO FLOW. MORE FLEXIBILITY IN ROUTING AND LOCATION WHERE GRAVITY DOESN'T MATTER. UTILITIES: SEWERS - MIN SLOPE IS 0.5% TO 2.0% DEPENDING ON PIPE SIZE. GREATER SLOPE FOR SMALLER PIPES.