SITE INFORMATION AND CORRESPONDENCE

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Contractor to provide traffic control at the pump islands during trenching activity to ensure safety of USA customers. All. trenches should be completed to match exiting surroundings (concrete/ asphalt or dirt). Stratus is responsible for the disposal of dirt from the trench excavation. Contractor to stockpile all dirt on visqueen and cover with visqueen on site. Stockpile area will be identified during site meeting. Contractor to saw cut, trench and install subgrade piping to vapor extraction wells. All piping shall be schedule 40 PVC for subgrade and schedule 80 PVC for above ground piping. Sub-grade piping shall have a gentle slope (1/16") towards the well to drain condensate back to the well. Each wel3 shall have a home run back to the system enclosure and manifold. All piping shall be vacuum tested. Vacuum test to consist of maintaining a 3-prig vacuum for not Jess than one hour. 2.0 Wellhead Conversion See Sheet C-3 x Contractor to procure and. install 4 well boxes. Please ensure that wellhead elevations are not impacted by conversion. 3.0 System Enclosure Please review Sheet C-2 for equipment layout and placement details. Contractor to mount one l 0-B:C. 10 pound carbon dioxide, fire extinguisher on inside of fence, adjacent to gate. Piping Manifold and Instrumentation See Sheet C-2 and M-I. The three vapor extraction wells should be stubbed up to a piping manifold. Contractor to procure and install all instrumentation. Contractor to provide unistrut support to the Manifold. Construction of the Manifold is to be based on details provided in Sheet M-I. System Installation Contractor to anchor the trailer mounted catalytic oxidizer unit to the asphalt surface. See Sheet C-2. Anchors to be placed such that they do not constitute a tripping hazard. C:INIy Documents\USA165\Constructio specs.doc stratus I i