[     Business case listing ](/case-studies "  Business case listing")



 

 

 

## The challenge

When Conoco’s water and wastewater operations partner was in financial difficulty and needing to divest some of its holdings, Veolia purchased its 50% interest in HydroServe Westlake LLC and took over their contract with Phillips 66 at this location. Veolia has been carrying out the remaining 28 years of its predecessor’s 30-year agreement to provide water production and wastewater treatment services to the Conoco refinery.  
   
The 7-MGD surface water treatment plant features lamella clarification, counter current mixed media filtration and chemical addition, while the 7-MGD wastewater treatment facility uses secondary and tertiary processes. This system includes cooling towers, equalization tanks, dual-train activated sludge treatment, clarification and thickening through dissolved air floatation. Wastewater sludge is dewatered using plate and frame presses, compressed air and chemical addition.

### The project challenges are:

- Veolia was challenged to provide water production and wastewater treatment services to Phillips 66, Inc.’s Lake Charles refinery at Westlake.
- The agreement included the purchase of a 50% interest in HydroServe, LLC – a joint venture with Conoco that includes the ownership of a 3.6MGD surface water treatment plant and a 7-MGD wastewater treatment facility.
- This is Phillips 66 largest refinery and processes approximately 10% of the lubricating base oil production in the U.S. This project ranks as one of the chemical industry’s largest industrial outsourcing agreements for water and wastewater treatment.



 

 

 



## The solution

### Innovative solutions:

- Veolia successfully treats the flow through secondary processes to return the water to discharge quality.
- Following dual-train activated sludge treatment and clarification, the final effluent is discharged to the river.
- Sludge is chemically conditioned, thickened through dissolved air floatation, dewatered on a belt and frame press and then landfilled.



 

 

 



## Benefits for our clients

### Results:

- The Veolia-managed water and wastewater facility at the Westlake complex had a zero recordable incidence rate (with 24,048 hours worked as of 2012) and 13 years with no LTA or RCA.
- Veolia achieved the “contractor award for meritorious safety performance” awarded by OSHA based on the achievements of employees’ safety records.
- Veolia successfully minimized their total recordable incident rate for the 2012 calendar year while working over 20,000 hours at each of Conoco’s sites.
- Veolia’s work in the Conoco/Hydroserve project also received this honor in 2002, 2004, and 2006 through 2012. The remaining 15 year agreement between Veolia and Westlake Chemical is expected to save Conoco $1 million annually in operating costs.



 

 

 



 

 

### Learn more about our solutions:

[Water Solutions](/what-we-do/water-capabilities "Water Capabilities")  
[Waste Solutions](/what-we-do/waste-capabilities "Waste Capabilities")  
[Energy Solutions](/what-we-do/energy-capabilities "Energy Capabilities")



 

 

 

 

 

 





### [HydroServe Westlake Case Study](http://info.veolianorthamerica.com/conoco-phillips-westlake-water-wastewater-case-study "HydroServe Westlake Case Study")

[Click here to see our case study. ](http://info.veolianorthamerica.com/conoco-phillips-westlake-water-wastewater-case-study "Click here to see our case study.
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