Monitoring PointsThird Energy UK Gas

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 1 - Monitoring LocationsDate: 13/03/2018

Figure 1

Borehole ASuperficial Deposits

Corallian Group:

Monitoring Points:

KMA Wellsite

Borehole BBorehole C

Borehole E

Kimmeridge Clay:Borehole D

:

N

S

W E

Scale 1 : 1,000 (at A3)

KEYKMA Wellsite boundary

Surface Waters: Sugar Hill Downstream Costa Beck Ackland Beck

Monitoring Points:

Sugar Hill UpstreamSuperficial Deposits

Kimmeridge Clay:

1 km Radius2 km Radius

500 m Radius

S3

Scale 1 : 30,000 (at A3)

N

S

W E

0.5 1km0 0.5 1km0

25 50m0

Concentrations of selected analytical parameters in surface watersThird Energy UK Gas

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 2 - Surface Water DataDate: 13/04/2018

Figure 2

KEYKMA Wellsite boundary

Surface Waters: Sugar Hill Downstream Costa Beck Ackland Beck

Monitoring Points:

Sugar Hill Upstream

1 km Radius2 km Radius

500 m Radius

S3

N

S

W E

Not to scale

0.5 1km0 0.5 1km0

0

20

40

60

80

100

120

140

160

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Calcium (mg/l)

S1 S2 S3 S4

0

10

20

30

40

50

60

70

80

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Sodium (mg/l)

S1 S2 S3 S4

0

10

20

30

40

50

60

70

80

90

100

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Sulphate (mg/l)

S1 S2 S3 S4

0

20

40

60

80

100

120

140

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Chloride (mg/l)

S1 S2 S3 S4

0

0.5

1

1.5

2

2.5

3

3.5

4

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Ammoniacal N (mg/l)

S1 S2 S3 S4 Detec on limit

0

10

20

30

40

50

60

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Nitrate as NO3 (mg/l)

S1 S2 S3 S4 Detec on limit

0

100

200

300

400

500

600

700

800

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Iron (dissolved) (µg/l)

S1 S2 S3 S4 Detec on limit

0

2

4

6

8

10

12

14

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Methane (µg/l)

S1 S2 S3 S4 Detec on limit

Superficial DepositsMonitoring Points:

KMA Wellsite

:

KEYKMA Wellsite boundary

Monitoring Points:Superficial Deposits

1 km Radius2 km Radius

500 m Radius

Not to scale

N

S

W E

Concentrations of selected analytical parameters in groundwaters within superficial depositsThird Energy UK Gas

Figure 3a

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 3a - Superficial DepositsDate: 13/04/2018

0.5 1km0 0.5 1km0

N

S

W E

25 50m0

Not to scale

Borehole ABorehole BBorehole C

0

50

100

150

200

250

300

350

400

450

500

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Calcium (mg/l)

G2 G3 G4 G5 G6 BHA BHB BHC

0

50

100

150

200

250

300

350

400

450

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Sodium (mg/l)

G2 G3 G4 G5 G6 BHA BHB BHC

0

100

200

300

400

500

600

700

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Sulphate (mg/l)

G2 G3 G4 G5 G6 BHA BHB BHC

0

20

40

60

80

100

120

140

160

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Chloride (mg/l)

G2 G3 G4 G5 G6 BHA BHB BHC

0

0.2

0.4

0.6

0.8

1

1.2

1.4

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Ammoniacal N (mg/l)

G2 G3 G4 G5 G6 BHA BHB BHC Detec on limit

0

1

2

3

4

5

6

7

8

9

10

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Nitrate as NO3 (mg/l)

G2 G3 G4 G5 G6 BHA BHB BHC Detec on limit

0

500

1000

1500

2000

2500

3000

3500

4000

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Iron (dissolved) (µg/l)

G2 G3 G4 G5 G6 BHA BHB BHC Detec on limit

0.1

1

10

100

1000

10000

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Methane (µg/l)

G2 G3 G4 G5 G6 BHA BHB BHC Detec on limit

Monitoring Points:

KMA WellsiteN

S

W E

Not to scale

KEYKMA Wellsite boundary

Monitoring Points:

1 km Radius2 km Radius

500 m Radius

Not to scale

N

S

W E

Kimmeridge Clay:

Kimmeridge Clay:Borehole D

Concentrations of selected analytical parameters in groundwaters within Kimmeridge ClayThird Energy UK Gas

Figure 3b

P:\Third Energy KMA (1996)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 3b - Kimmeridge ClayDate: 13/04/2018

0.5 1km0 0.5 1km0

25 50m0

0

10

20

30

40

50

60

70

80

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Calcium (mg/l)

BHD G1

0

100

200

300

400

500

600

700

800

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Sodium (mg/l)

BHD G1

0

100

200

300

400

500

600

700

800

900

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Sulphate (mg/l)

BHD G1

40

50

60

70

80

90

100

110

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Chloride (mg/l)

BHD G1

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Ammoniacal N (mg/l)

BHD G1 Detec on limit

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Nitrate as NO3 (mg/l)

BHD G1 Detec on limit

0

200

400

600

800

1000

1200

1400

1600

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Iron (dissolved) (µg/l)

BHD G1 Detec on limit

0

100

200

300

400

500

600

700

800

900

24/04/17 24/06/17 24/08/17 24/10/17 24/12/17 23/02/18 25/04/18

Methane (µg/l)

BHD G1 Detec on limit

Monitoring Points:

KMA WellsiteN

S

W E

Not to scale

KEYKMA Wellsite boundary

1 km Radius2 km Radius

500 m Radius

Not to scale

N

S

W E

Corallian Group:Borehole E

Concentrations of selected analytical parameters in groundwaters within Corallian GroupThird Energy UK Gas

Figure 3c

P:\Third Energy KMA (1996)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 3c - Corallian GroupDate: 13/04/2018

0.5 1km0 0.5 1km0

25 50m0

Durov Diagram - Monitoring Rounds 23 to 38

Third Energy UK Gas

Figure 4

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 - 14_03_18\Figures\Figure 4 - Durov plotDate: 13/04/2018

Note: Samples plo ed as meq/l propor ons

KEY

0

50

100

150

200

250

300

~10 - 193 mKimmeridge Clay

(Ancholme Group)

Made Ground / Superficial Deposits

Weathered Kimmeridge Clay(Ancholme Group)

193 - 303 mCorallian Group

G2 G3 G4 G5 G6

S3

* Depths based on geology encountered during the drilling of KM8 and confirmed during drilling of KMA Wellsite monitoring boreholes

Geological Horizons Targeted by Monitoring PointsThird Energy UK Gas

Figure 5

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 5 - Targeted GeologyDate: 13/04/2018

Superficial Deposits

Corallian Group:

Monitoring Points:

KMA Wellsite

Borehole E

Kimmeridge Clay:Borehole D

:

N

S

W E

Scale 1 : 1,000 (at A3)

KEYKMA Wellsite boundary

Surface Waters: Sugar Hill Downstream Costa Beck Ackland Beck

Monitoring Points:

Sugar Hill UpstreamSuperficial Deposits

Kimmeridge Clay:

1 km Radius2 km Radius

500 m Radius

S3

Scale 1 : 30,000 (at A3)

N

S

W E

0.5 1km0 0.5 1km0

25 50m0

Borehole ABorehole BBorehole C

0

5

10

15

20

25

30

24/04/2017 24/06/2017 24/08/2017 24/10/2017 24/12/2017 23/02/2018 25/04/2018

G3 BHE Detec on limit

Concentrations of dissolved ethane in boreholes G3 and BHEFigure 6a

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 6a - G3 BHE ethaneDate: 13/04/2018 Third Energy UK Gas

10

100

1000

10000

100000

24/04/2017 24/06/2017 24/08/2017 24/10/2017 24/12/2017 23/02/2018 25/04/2018

G3 BHE

Points are not plotted where ethane concentrations are below analytical detection. Ratios for G1 are not plotted, as ethane is consistently <1 µg/L, but given typical methane concentrations of 600-700 µg/L, the molar ratio typically exceeds 1000.

Concentrations of dissolved ethane in boreholes G3 and BHEFigure 6b

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 6b - ratio methane ethaneDate: 13/04/2018 Third Energy UK Gas

Variation in C Isotopic Signature in the Dissolved CH in water samples from all monitoring locations13 4

Third Energy UK GasP:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 7 - Isotopic CH4Date: 13/04/2018

Figure 7

-90

-80

-70

-60

-50

-40

-30

06/03/2017 25/04/2017 14/06/2017 03/08/2017 22/09/2017 11/11/2017 31/12/2017 19/02/2018 10/04/2018

BHA BHB BHC BHD BHE Laboratory tap water

-90

-80

-70

-60

-50

-40

-30

06/03/2017 25/04/2017 14/06/2017 03/08/2017 22/09/2017 11/11/2017 31/12/2017 19/02/2018 10/04/2018

S1 S2 S3 S4 G1 G2 G3 G4 G5 G6 Laboratory tap water

Variation in C Isotopic Signature in the Dissolved CO in water samples from all monitoring locations13 2

Third Energy UK GasP:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 8 - Isotopic CO2Date: 13/04/2018

Figure 8

-35

-30

-25

-20

-15

-10

-5

0

06/03/2017 25/04/2017 14/06/2017 03/08/2017 22/09/2017 11/11/2017 31/12/2017 19/02/2018 10/04/2018

BHA BHB BHC BHD BHE

-35

-30

-25

-20

-15

-10

-5

0

06/03/2017 25/04/2017 14/06/2017 03/08/2017 22/09/2017 11/11/2017 31/12/2017 19/02/2018 10/04/2018

S1 S2 S3 S4 G1 G2 G3 G4 G5 G6

Groundwaters from G3 and BHE plotted on a Bernard (Refs. 8, 9) diagram, also showing diagnostic fields after Schloemer et al. (Ref. 11). The arrows show ranges of 13CH4 signature after Baldassare (Ref. 10). Samples from G1 typically exhibit molar methane/ethane ratios >1000 and also occasionally exhibit highly negative 13CH4, suggesting also a biogenic (CO2 reduction) derivation.

1

10

100

1000

10000

100000

-100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0Carbon-13 (‰) in methane

BHE

G3

Typical biogenic methanogenesis field

Typical petrogenic field

Deple on duringmigra on

ThermogenesisCO2 reduc on (m'genesis)

Acetate fermenta on

Bernard Diagram for groundwater from borehole G3 and BHEFigure 9

P:\Third Energy KMA (2335)\40 - Reporting\Operational Data\Round 38 -14_03_18\Figures\Figure 6b - ratio methane ethaneDate: 13/04/2018 Third Energy UK Gas