This layer will be slow to drain after a rain event and water ponding at the surface of field.
When the surface layer becomes compact and dry it becomes excessively hard. This condition creates an increased risk for player to field contact injuries.
This layer prevents rainwater from draining through quickly and holds water up at the surface making the field slow to drain and unplayable during wet periods.
The stone contains fine stone dust particles that lock up and compact, preventing water from entering the drainage system which is located below this layer.
This material is not typically used in athletic field construction as an approved growing media or drainage material.
The composition of this material does not meet general standards for professional, high school or parks and recreational infield mix design. The ratio of sand, silt and clay does not comply with industry standards for baseball infield mix.
欲解決上述問題,報告建議要重建表土層及去除清碎石層。
Reconstruction of this layer with a rootzone material capable of resisting compaction and allowing for enhanced drainage performance is recommended.
Removal of this layer is necessary to provide field drainage.