Pavillion Groundwater Investigation Pavillion Wyoming Phase I Sampling Results August 11, 2009.

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Presentation transcript:

Pavillion Groundwater Investigation Pavillion Wyoming Phase I Sampling Results August 11, 2009

Sampling Objectives Determine if contamination is present in domestic wells Determine contaminant characteristics Determine potential impacts to public health and the environmennt

CLP Lab Data SVOC + TICs VOCs + TICs Pesticides PCBs TAL Metals R8 Lab Data Low SVOC TICs Low VOC TICs TOF-MS PMBE Anions Water Chemistry Com Lab Data GRO DRO BAC-T Determine Relevant Data Process Data Validation Interpretation Relevance Merge Data Sources Select Wells and Sources for Further Investigation Choose Tests/ Methods for Further Investigation

EPA R8 Lab: TICs

VOC & SVOC TICs: Summary TIC CompoundSamples Adamantanes PGDW05 PGDW20 PGDW30 2-Butoxyethanol Phosphate PGDW04 PGDW10 PGDW25 2,4-bis(1-phenyl)-phenol PGDW23 Bisphenol A PGDW05 Terpineol PGDW20 5-Hydroxymethyldihydrofuran PGDW20 Limonene PGDW03

Methane Detections Methaneµg/L PGDW PGDW PGDW20137 PGDW PGDW23146 PGDW30558 PGDW PGDW3521.6

Summary and Interpretation of Results Our results show most wells sampled have no apparent health concerns 11 wells have insufficient data for us to assure well owners of no health concerns from drinking their well water (EPA is working with those well owners) Potentially a connection between our results and oil and gas production activities. We cannot pinpoint any specific source at this time.

Next Steps Further Sampling for specific drinking water wells and potential sources Meeting with stakeholders to determine the best way to approach the next sampling effort Parallel issue: EPA will be talking with EnCana to evaluate and reduce any potential overall adverse impacts of oil and gas production.