| Companies 1 to 15 |
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| Beck Drilling and Environmental Services Ltd. - Calgary (AB) |
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| Calgon Carbon Canada, Inc. - Bolton (ON) |
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| Elmridge Engineering Inc. - Livonia (MI) |
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| Elmridge Engineering Inc. - Aurora (ON) |
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| Nichols Environmental (Canada) Ltd. - Calgary (AB) |
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| Nichols Environmental (Canada) Ltd. - Edmonton (AB) |
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| Oak Environmental Inc. - Calgary (AB) |
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| Procesco Inc. - Calgary (AB) |
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| Remedx Remediation Services Inc. - Calgary (AB) |
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| Terry Ruddy Sales - Edmonton (AB) |
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| Tervita Corporation - Edmonton (AB) |
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| Tervita Corporation - Calgary (AB) |
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| Tervita Corporation - Houston (TX) |
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| Tervita Corporation - Acheson (AB) |
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| Tervita Corporation - Blackfalds (AB) |
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