Calculations determine the required runoff flow from a water quality storm event using the rational method with a tributary area of 9,102 square feet. Rainfall intensity is established at 0.2 inches per hour per the California Stormwater BMP Handbook, yielding a total discharge flow of 0.042 cubic feet per second or approximately 19 gallons per minute. The structural stormwater treatment device is specified as a Contech Engineered Solutions SMFH48 Storm Filter with hatch and phosphosorb media using 18-inch tall cartridges. Additional site design measures and source control measures are listed to reduce existing impervious surfaces, cluster pavement, and manage runoff.
DMAS 1A, 1B & 1C TCM#1 MEDIA-FILTER UNIT SIZING CALCULATIONS SOURCE CONTROL MEASURES · · · · · SITE DESIGN MEASURES · · · · ·
Members view this detail in full resolution, download the CAD files (SVG, PDF), and can adapt it in the built-in CAD editor — export DXF, DWG, or PDF.
Start membership