Parachute Creek spill: Day 80

Parachute_GW_Benzene_Isoconcentration

Click here for the last known groundwater contamination map:  Benzene Concentrations in Groundwater & Isoconcentration Map 4-19-13

CDPHE Update — May 24:  Parachute Creek surface water sample sites non-detect for benzene

On Monday, May 20, Parachute Creek surface water sample site 6 (CS6) had a benzene detection of 1.4 ppb. Since Tuesday, May 21, surface water sample location CS6 and all other surface water sample sites have been non-detect for benzene contamination.

Multiple times a day during daylight hours, visual surveys are conducted along Parachute Creek to look for hydrocarbon sheen on the surface. This practice is done to provide an extra form of contamination detection alongside surface water and ground water sampling. No sheen has been observed.

Ground water testing wells and hydrocarbon recovery wells are continue to be installed or updated to ensure maximum recovery of floating hydrocarbon and ability to measure/observe potential contaminant movement. With this technology, the ground water hydrocarbon contamination plume can be closely monitored and its boundaries well-defined. There also is continuous ground water and surface water sampling to ensure plume stability and evaluate the effectiveness of current remediation efforts.
[end of update]

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Williams May 24 update: Company Response Continuing to Show Progress in Protecting Parachute Creek, Recovering Increasing Volumes of Hydrocarbon Fluids

Water sampling test results at Williams Answers for Parachute website:  Testing Results & Other Info
Note: No test results are being shown for sampling sites upstream closer to the Williams gas processing plant.

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