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Construction QA/QC for Recycle Facility

The Recycle Facility was constructed for treatment and storage of produced water associated with oil and gas activity.

The Recycle Facility was designed with a 40-mil LLDPE (low density polythene) secondary liner, a geo-composite drainage layer, and a 60-mil HDPE (high density polythene) primary liner.  The bottom of the pit was designed to drain toward a sump. A 6-in diameter HDPE pipe was installed from the top of the berm to the sump to allow testing for fluid that might migrate through the top or primary liner.

Envirotech Engineering & Consulting, Inc. (Envirotech) performed compaction testing on both the pit floor and side slopes.

Envirotech provided soil compaction testing as well as Construction Quality Assurance/Quality Control (QA/QC) for the installation of the LLDPE and HDPE liners and leak detection system. Envirotech ensured that the liner was installed pursuant to the Flow Back Pit Application. Daily Inspection Reports were developed as well as documentation for all testing.

Envirotech was on-site to provide compaction testing during construction of the storage pit.  Initially, soil samples were collected and brought back to Envirotech’s Enid laboratory, where Standard Proctors were run pursuant to ASTM D698. With this information, a Troxler nuclear gauge was utilized to check the compaction against the required specifications.

Construction Quality Assurance/Quality Control (QA/QC) for the installation of the liner systems was also provided by Envirotech. This included evaluation of the liner product, oversight for the liner deployment and installation, and seam air testing.

Categories: Construction Materials Testing , Construction QA/QC , Oil and Gas Companies