Elizabeth Perry of AECOM

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

Methane and Sodium, NE PA 10000 1000 max All NE PA Baseline Samples Na HAL (20 mg/L) Median Na Sodium Concentration (mg/L) 100 10 1 p90 p75 p50 p25 p10 min HAL (20) 0.1 n=8,543 2,050 286 266 117 ND ND to 3 3 to 7 7 to 20 >20 Methane Concentration Range (mg/L) Evaluation <strong>of</strong> Baseline (Pre-Drill) Data Page 22
Methane and Chloride, NE PA 100000 10000 All NE PA Baseline Samples Cl SMCL (250 mg/L) Median Cl max Chloride Concentration (mg/L) 1000 100 10 1 p90 p75 p50 p25/p10 min SMCL (250) 0.1 n=8,543 2,050 286 265 117 ND ND to 3 3 to 7 7 to 20 >20 Methane Concentration Range (mg/L) Evaluation <strong>of</strong> Baseline (Pre-Drill) Data Page 23
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 and 20: Samples with Methane ≥ 3 mg/L, NE
Page 21: Methane and Water Type, Northeaster
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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