Datasheet: D1 Data GB01 Dated 01.01.2010 Page 1 of 2 B1 Drainage Composite Construction Core Extruded Polyethylene (PE) Net Filter/Separator Nonwoven thermally bonded geotextile (Polyethylene/Polypropylene) on one side of the core Hydraulic Properties — Composite (Mean values) In Plane Water Flow EN ISO 12958 20kPa l.m.s (10-3m2/s) 1.00 100kPa l.m.s (10-3m2/s) 0.95 200kPa l.m.s (10-3m2/s) 0.88 Hydraulic Properties — Filter (Mean values) Pore Size EN ISO 12956 mm 0.15 Permeability (Velocity Index H50) EN ISO 11058 l/m2s (10-3m/s) 100 Mechanical Properties — Composite (Mean values) Tensile Strength EN ISO 10319 MD kN/m 11.0 EN ISO 10319 CMD kN/m 9.50 CBR Puncture Resistance EN ISO 12236 N 2000 Physical Properties—Composite (Typical values) Mass per Unit Area EN ISO 9864 g/m2 535 Thickness (2kPa) EN ISO 9863-1 mm 4.5 Roll Width m 2.0 or 4.0 Roll Length m 25, 50 or 100 Filter Overlap (One Side) mm 100 (Surfaces Hard/Hard, Hydraulic Gradient = 1.0) Notes: 1. TERRAM B1 comprises a polyethylene, three dimensional net structure with a layer of TERRAM geotextile bonded to one side by thermal lamination. 2. The mechanical and hydraulic results quoted are the family means of the appropriate tests derived over periods of time. 3. The in-plane water flow is measured in the length (longitudinal) direction.

Datasheet: D1 Data GB01 Dated 01.01.2010 Page 2 of 2 TERRAM B Drainage Net TERRAM Geotextile The information contained herein is, to the best of our knowledge, accurate in all material respects. However, since the circumstances and conditions in which such information and the products mentioned herein can be used may vary and are beyond our control, no representation or warranty, express or implied, of any nature whatsoever is or will be made and no responsibility or liability is or will be accepted by us, any of our affiliates or our or their respective directors, officers, employees or agents...