Site is Sunnyvale,Ca. in Santa Clara County. Ground water is 110 ft down. Top 8 ft. is top soil, then 15 ft of Sandy Clay (ML), 10 ft. of sandy clay with gravel (CL), and then 40 ft. of gravelly silty clay(ML-CL). I have 11,000 sf of pavement area and an occasional 1500 gal load of water from a...
I am designing an on-site storm drain percolation pit and need some details of the infiltration layers to use on the bottom and slopes. Any recommendations or references?
Collect on-site and pump to the gutter leading to the closest storm inlet. As you say, treatment may be required or desired to avoid NPDES citations. Look at the Vortechs System at vortechnics.com for guidance.
