| Test Results | | Total Petroleum Hydrocarbon Retention |   | | Date | Laboratory Location | TPH Retention | | 7 February 2005 | Industrial Research Limited Auckland, New Zealand | 92.9% 97.4% 96.1% | | 20 June 2005 | Laboratorio Chimico Merceologico Trieste, Italy | 89% 96% | | 22 April 2009 | ALS Lab Group Ontario, Canada | 10,496mg (MBPP media only) | | 10 July 2009 | PC&B Environmental Laboratories Florida, United States of America | 3501.81mg | | | | | | | | | ` | | PERCENT REMOVAL | | | WATER | | COPPER | ZINC | ORTHO PO4 | SOURCE | MEDIUM | % | % | % | | Catch Basin Sump | ESI●MZ | 33 | 50 | 81 | | PuraSenseTM | 33 | 75 | 76 | | | | PC&B Environmental Laboratories, Inc. (United States) |  | | | | Laboratorio Chimico Merceologico (Italy) |  | | | | Industrial Research Limited (New Zealand) |  |
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