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PROJECT WIDE GUIDELINES AND STANDAR STOCKTON METRnPOLTTAN AIRPORT -SPECIAL PURPOSE PLAN d. Grading, Drainage & Soil Preparation Q Goals: 13 • Protect buildings and business activi- 2. Site soils are generally shallow and poorly Q ties from damage or disruption from drained,conditions which are detrimental to 13 storm water and flooding. healthy plant growth. Proper cultivation,soil conditioning and the installation of sub- Ea • Drain water from individual parcels drainage systems should be provided as without causing excess water concen- required to improve poor soil conditions. trations on adjacent sites to minimize 13 erosion. 3. Low berms are encouraged for planting areas in response to the poor quality of on- 13 • Improve poor-quality on-site soil con- site soil and drainage. ditions in order to create more attrac- tive, healthy and sustainable landscape 13 plantings. 13 Guidelines: 0 1. All fountain drains, roof drains,area drains, Q and catch basins shall be collected and rout- ed into an underground or street drainage 13 system. Adequate drains shall be provided to prevent flooding. 2. Surface drainage shall be directed away from buildings and collected into the park deten- tion ponds. That which cannot be collected into the ponds shall be directed into an Q underground or street drainage system. 13 3. Percolation testing of all tree planting pits shall be required. Planting holes shall be filled up with water and left overnight to 0 drain. If these beds do not drain, supple- mental under drain is required. Standards: I. Erosion control procedures should be pro- vided during construction such that no waterlsoil erosion encroaches onto adjacent 13 sites. 13 Q 111. 4-30 OPEN SPACE, LANDSCAPE AND STREETSCAPES C3