0.56 0.57 0.58 0.59 0.6 0.61 0.62 0.631000

1010

1020

1030

1040

1050

1060

1070

1080

1090

Exhibit 7.2 Wasatch Front (North) Interchangeability

2013 Daily Averages

OTPL to QPCPaysonKern RiverCoalvilleUpper Wobbe Limit (+5%)Lower Wobbe Limit (-5%)

Specific Gravity

Heati

ng V

alue

(BTU

)

Upper Limit 1382 (+5%)

Lower Limit 1309 (-5

%)

0.56 0.58 0.6 0.62 0.64 0.66 0.681000

1020

1040

1060

1080

1100

1120

1140

1160

1180

Exhibit 7.3Vernal Area (Eastern) Interchangeability 2013

Daily Averages

AltamontMytonBluebellIsland ParkGordon Creek1425 Upper LimitEastern Set PointLower Limit (-5%)

Specific Gravity

Heati

ng V

alue

(BTU

)

1425 (Maximum per Benson

Study)

Lower Limit 1309 (-5%)

1378 (Eastern Set Point)

0.56 0.57 0.58 0.59 0.6 0.61 0.62 0.63 0.64 0.65980

1000

1020

1040

1060

1080

1100

1120

1140

Exhibit 7.4Western and Far Eastern (Utah) Interchangeability

2013 Daily Averages

Moab / MonticelloDutch JohnKern RiverUpper Limit (+5%)Region Set PointLower Limit (-5%)

Specific Gravity

Heat

Val

ue (B

TU)

Upper Limit 1424 (+5%)

1356 (Region Setpoint)

Lower Limit 1288 (-5%)

0.560000000000001 0.610000000000001 0.660000000000001980

1000

1020

1040

1060

1080

1100

1120

1140

1160

Exhibit 7.5Eastern Interchangeability (Wyoming)

2013 Daily Averages

Green RiverGreen River Border StationRock Springs (JL4)Rock Springs (Kent Ranch)Rock Springs (Airport)Rock Springs (Little America)GrangerLymanBig PineyLa BargeWamsutterBaggsUpper LimitEastern Region Set PointLower Limit (-5%)

Specific Gravity

Heati

ng V

alue

(BTU

)

1425 (Maximum per Environ Study)

1378 (Eastern Setpoint)

1309 (-5%)

0.57 0.58 0.59 0.6 0.61 0.62 0.631000

1010

1020

1030

1040

1050

1060

1070

1080

1090

1100

Exhibit 7.6Western Interchangeability (Wyoming)

2013 Daily Averages

EvanstonEvanston (North)Evanston (Airport)KemmererUpper Limit (+5%)Lower Limit (-5%)

Specific Gravity

Heati

ng V

alue

(BTU

)

Upper Limit 1382 (+5%)

Lower Limit 1309 (-5%)