Elizabeth Perry of AECOM

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$Risk Based Data Management Solutions (RBDMS) Hydrofrac Module$

Methane and Water Type, Northeastern PA Number of Samples 2000 1800 1600 1400 1200 1000 800 600 400 200 CH4 >20 mg/L CH4 7 - 20 mg/L CH4 3 - 7 mg/L CH4 >0.026-3 mg/L CH4 ND (
Methane and Water Type, Northeastern PA Percent of Samples 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Ca-HCO3 Other Na-HCO3 Na-Cl Water Type (primary ions) CH4 ND (0.026-3 mg/L CH4 3 - 7 mg/L CH4 7 - 20 mg/L CH4 >20 mg/L CH 4 3-7 mg/L CH 4 7-20 mg/L CH 4 >20 mg/L Ca-HCO 3 21% 15% 9% Na-HCO 3 47% 47% 42% Na-Cl 30% 37% 44% Other 2% 1% 5% • For samples with > 3 mg/L methane, 81% associated with Na-Cl or Na-HCO 3 water type • Methane > 20 mg/L, only 9% of samples Ca-HCO 3 Evaluation of Baseline (Pre-Drill) Data Page 21
Page 1 and 2: The Occurrence of Methane in Shallo
Page 3 and 4: Baseline (Pre-Drill) Sampling Progr
Page 5 and 6: Evaluation of Baseline (Pre-Drill)
Page 15 and 16: Methane Occurrence Inversely Relate
Page 17 and 18: Samples with Methane Non-detected,
Page 19: Samples with Methane ≥ 3 mg/L, NE
Page 23 and 24: Methane and Chloride, NE PA 100000
Page 25 and 26: Methane and Barium, NE PA 100 10 ma
Page 33 and 34: Overall Findings and Conclusions

Elizabeth Perry of AECOM

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