200 mm 400 mm Maximum Water Level (mm) 900 mm 1.5 m Cover Level 0.0 m Outflow Control Hydro-Brake Blocks Porous Sub Base Maximum Depth (mm) GL Porous Car Park Storage Design

200 mm 400 mm Maximum Water Level (mm) 900 mm 1.5 m Cover Level 0.0 m Blocks Porous Sub Base Maximum Depth (mm) GL Porous Car Park Storage Design

200 mm 150 mm Maximum Water Level (mm) 550 mm 0.9 m Cover Level 0.0 m Outflow Control Hydro-Brake Blocks Porous Sub Base Maximum Depth (mm) GL Porous Car Park Storage Design

200 mm 150 mm Maximum Water Level (mm) 550 mm 0.9 m Cover Level 0.0 m Blocks Porous Sub Base Maximum Depth (mm) GL Porous Car Park Storage Design

50 mm 100 mm 150 mm 120 mm 1170 mm 1080 mm 1.5 m Cover Level 0.0 m Outflow Control Hydro-Brake Tarmac Sub-Base Gravel Cellular Storage Cellular Storage Design 90 mm GL Maximum Water Level

50 mm 100 mm 150 mm 120 mm 1170 mm 1080 mm 1.5 m Cover Level 0.0 m Outflow Tarmac Sub-Base Gravel Cellular Storage Cellular Storage Design 90 mm GL Maximum Water Level

50 mm 100 mm 150 mm 520 mm 1.0 m 680 mm 1.5 m Cover Level 0.0 m Outflow Control Hydro-Brake Tarmac Sub-Base Gravel Cellular Storage Cellular Storage Design 320 mm GL Maximum Water Level

50 mm 100 mm 150 mm 520 mm 1.0 m 680 mm 1.5 m Cover Level 0.0 m Tarmac Sub-Base Gravel Cellular Storage Cellular Storage Design 320 mm GL Maximum Water Level