33 47 27 Bioretention Soil - SFPUC

Materials selected shall be sufficiently permeable to allow water to pass through at a rate equal to or greater than the underlying BSM. Typical mulch recommended for this application includes tree trimming mulch per Caltrans Standard Specification Section 207.02D(6)(a) and (e), or other comparable material (e.g., arbor mulch). ................
................