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Location: Casper, Wyoming |
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Completion Date: 2003 |
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Project Type: Industrial |
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Design Flow: 6,000,000 |
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Waste Type: Industrial |
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| Treatment: |
Subsurface Flow Wetland with Forced Bed Aeration |
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 Need: The former Casper refinery operated from 1912 to 1991. Due to water table fluctuations from the nearby North Platte River, an extensive smear zone underlies the site. Since 1981, over 37,000 m3 of LNAPL have been recovered. Remediation of the site is projected to take 50 to 100 years.
Solution: The refinery components were removed and the site was converted into an 18-hole golf course and office park. A treatment system consisting of a cascade aerator, two surface flow wetlands and two aerated subsurface flow wetlands were installed for BTEX degradation.
Benefit: The site is now a beautiful green space adjacent to the City. Amenities include walking trails, a river park, and a whitewater kayak course. The wetlands are integrated into the golf course water features. BP saved $12.5 million compared to conventional mechanical treatment.
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