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CLIENT: Petroleum Pipeline Company
LOCATION: Schererville, Indiana
HIGHLIGHTS: Treatment of 1,330,500 gallons of contaminated water resulting from the hydro test of a petroleum pipeline
Water Treatment
A petroleum pipeline company retained Environmental Services, Inc. (ESI) to treat the water resulting from the hydrotest of a 70-mile segment of a major petroleum pipeline. ESI selected and operated a custom water treatment system tailored to the hydrotest water characteristics. Through this approach, the client obtained water treatment services at an exceptional value.
Waste Water Description
The client Ahydro tested@ a 70-mile pipeline segment using water from an onsite firewater retention pond. The test Agenerated@ 1,333,500 gallons of contaminated water from the test water contacting residual product in the pipeline and storage tank. The hydrates water had a BETX concentration of approximately 12 milligrams per liter (mg/l) and a Total Organic Carbon (TOC) content of 102 mg/l. The stored wastewater also had a six-inch free product layer.
Initially, the client anticipated a total hydrates water volume of 840,000 gallons. The pipeline testing sequencing required the use of additional water, with the resulting 1,333,500 total volume. ESI was able to revise the system selection to accommodate the additional flow without delaying the water treatment effort.
Waste Water Treatment System
The client needed to return quickly the aboveground storage tank used to hold the hydrates water to service in order to store diesel fuel, which required that ESI prepare for and treat the hydrates water on an expedited schedule. ESI selected readily-available treatment system components to meet the treatment objectives for the hydrates water employing a system using a bag filter for particulate removal followed by two parallel adsorption treatment trains; additionally a treated clay for adsorption of heavier end organic compounds followed by activated carbon for light end compounds adsorption was used. Because clay has a significantly higher adsorption capacity, this dual adsorbate system provided the required level of treatment at a very cost effective price for the client. Treated water was discharged through a 750-foot temporary pipe to the firewater retention pond.
System Operations
ESI operated the treatment system 24-hours per day for eight days in December. ESI also collected system effluent samples in accordance with National Pollution Discharge Elimination System (NPDES) sampling requirements for discharge of tank water bottoms. ESI operated the system without shutdown.
Water Treatment Project Cost & Schedule
ESI was able to treat the hydro test water at a cost significantly less than the cost of off-site disposal. As important, ESI’s water treatment efforts allowed the petroleum pipeline company client to quickly return the storage tank to service.
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