Common use of Calculation of the Volumetric Compensation for Quality Clause in Contracts

Calculation of the Volumetric Compensation for Quality. The Volumetric Compensation for Quality is a process independent from the monthly balance of the system per senders. This process is made after making said monthly balance official, and the adjustments generated by the process will be included in the monthly balance of the Month of Operation for which the adjustments of the Volumetric Compensation for Quality were figured out. The steps to be followed in the calculation of distribution of volumes in the Volumetric Compensation for Quality are shown in Illustration (3). § Determine deliveries per Sender (Original Barrels = Ei § Determine the price of the currents that converge (Qi = $ USD / BBL) x Ei § Calculate the fraction of the cost fir each sender (F. C. = Qi / Q T § Calculate the Equivalent Barrels per Sender (B. Eq. = Original Bls x F. C) § Calculate Adjustments CVC = Equivalent Barrels – Original Barrels) Illustration 3 – CVC Calculation Scheme Where: Ei = Deliveries per sender in the entry node Qi = Price of the currents that are delivered in the entry node F. C. = Percentage of the ratio between the price of the deliveries per sender and the total price of the currents of all senders DC – Contrato de Transporte de Crude Oil – 008 – 2013 81 Attachment 3 HYDROCARBONS’ MINIMUM QUALITY SPECIFICATIONS TEST PARAMETER VALUE OF THE PARAMETER TEST STANDARD Sediment and water or particles Not to exceed 0.5% in volume Sediments – ASTM D 473Water – Xxxx Xxxxxx API at 60 ºF Higher than 18 API degrees, but lower than 50 API Decrees D 1298 Viscosity @ the temperature of reference Not to exceed 300 cSt at 30 ºC ASTM D 445 or D 446 Vapor Pressure Not to exceed 11 lb / square inchReid Vapor Pressure ASTM D 323 Receipt Temperature Not to exceed 120 ºF Salt contents 20 PTB ASTM D 3230 Fluidity Point Not higher than 12 ºC ASTM D 93 DC – Contrato de Transporte de Crude Oil – 008 – 2013 82 Attachment C Entry and Exit Points

Calculation of the Volumetric Compensation for Quality. The Volumetric Compensation for Quality is a process independent from the monthly balance of the system per senders. This process is made after making said monthly balance official, and the adjustments generated by the process will be included in the monthly balance of the Month of Operation for which the adjustments of the Volumetric Compensation for Quality were figured out. The steps to be followed in the calculation of distribution of volumes in the Volumetric Compensation for Quality are shown in Illustration (3). DC- Crude Oil Transportation Agreement - 009 - 2013 93 § Determine deliveries per Sender (Original Barrels = Ei § Determine the price of the currents that converge (Qi = $ USD / BBL) x Ei § Calculate the fraction of the cost fir each sender (F. C. = Qi / Q T § Calculate the Equivalent Barrels per Sender (B. Eq. = Original Bls x F. C) § Calculate Adjustments CVC = Equivalent Barrels – Original Barrels) Illustration 3 – CVC Calculation Scheme Where: Ei = Deliveries per sender in the entry node Qi = Price of the currents that are delivered in the entry node F. C. = Percentage of the ratio between the price of the deliveries per sender and the total price of the currents of all senders DC – Contrato de Transporte de DC- Crude Oil – 008 – Transportation Agreement - 009 - 2013 81 94 Attachment 3 HYDROCARBONS’ MINIMUM QUALITY SPECIFICATIONS TEST PARAMETER VALUE OF THE PARAMETER TEST STANDARD Sediment and water or particles Not to exceed 0.5% in volume Sediments – ASTM D 473Water – Xxxx Xxxxxx API at 60 ºF Higher than 18 API degrees, but lower than 50 API Decrees D 1298 Viscosity @ the temperature of reference Not to exceed 300 cSt at 30 ºC ASTM D 445 or D 446 Vapor Pressure Not to exceed 11 lb / square inchReid Vapor Pressure ASTM D 323 Receipt Temperature Not to exceed 120 ºF Salt contents 20 PTB ASTM D 3230 Fluidity Point Not higher than 12 ºC ASTM D 93 DC – Contrato de Transporte de DC- Crude Oil – 008 – Transportation Agreement - 009 - 2013 82 95 Attachment C Entry and Exit Points

Calculation of the Volumetric Compensation for Quality. The Volumetric Compensation for Quality is a process independent from the monthly balance of the system per senders. This process is made after making said monthly balance official, and the adjustments generated by the process will be included in the monthly balance of the Month of Operation for which the adjustments of the Volumetric Compensation for Quality were figured out. The steps to be followed in the calculation of distribution of volumes in the Volumetric Compensation for Quality are shown in Illustration (3). § Determine deliveries per Sender (Original Barrels = Ei § Determine the price of the currents that converge (Qi = $ USD / BBL) x Ei § Calculate the fraction of the cost fir each sender (F. C. = Qi / Q T § Calculate the Equivalent Barrels per Sender (B. Eq. = Original Bls x F. C) § Calculate Adjustments CVC = Equivalent Barrels – Original Barrels) Illustration 3 – CVC Calculation Scheme DC – Contrato de Transporte de Crude Oil – 017 – 2013 93 Where: Ei = Deliveries per sender in the entry node Qi = Price of the currents that are delivered in the entry node F. C. = Percentage of the ratio between the price of the deliveries per sender and the total price of the currents of all senders DC – Contrato de Transporte de Crude Oil – 008 017 – 2013 81 94 Attachment 3 HYDROCARBONS’ MINIMUM QUALITY SPECIFICATIONS TEST PARAMETER VALUE OF THE PARAMETER TEST STANDARD Sediment and water or particles Not to exceed 0.5% in volume Sediments – ASTM D 473Water – Xxxx Xxxxxx API at 60 ºF Higher than 18 API degrees, but lower than 50 API Decrees D 1298 Viscosity @ the temperature of reference Not to exceed 300 cSt at 30 ºC ASTM D 445 or D 446 Vapor Pressure Not to exceed 11 lb / square inchReid Vapor Pressure ASTM D 323 Receipt Temperature Not to exceed 120 ºF Salt contents 20 PTB ASTM D 3230 Fluidity Point Not higher than 12 ºC ASTM D 93 DC – Contrato de Transporte de Crude Oil – 008 017 – 2013 82 95 Attachment C Entry and Exit Points

Calculation of the Volumetric Compensation for Quality. The Volumetric Compensation for Quality is a process independent from the monthly balance of the system per senders. This process is made after making said monthly balance official, and the adjustments generated by the process will be included in the monthly balance of the Month of Operation for which the adjustments of the Volumetric Compensation for Quality were figured out. The steps to be followed in the calculation of distribution of volumes in the Volumetric Compensation for Quality are shown in Illustration (3). DC – Crude Oil Transportation Agreement – 018 – 2013 91 § Determine deliveries per Sender (Original Barrels = Ei § Determine the price of the currents that converge (Qi = $ USD / BBL) x Ei § Calculate the fraction of the cost fir each sender (F. C. = Qi / Q T § Calculate the Equivalent Barrels per Sender (B. Eq. = Original Bls x F. C) § Calculate Adjustments CVC = Equivalent Barrels – Original Barrels) Illustration 3 – CVC Calculation Scheme Where: Ei = Deliveries per sender in the entry node Qi = Price of the currents that are delivered in the entry node F. C. = Percentage of the ratio between the price of the deliveries per sender and the total price of the currents of all senders DC – Contrato de Transporte de Crude Oil Transportation Agreement – 008 018 – 2013 81 92 Attachment 3 HYDROCARBONS’ MINIMUM QUALITY SPECIFICATIONS TEST PARAMETER VALUE OF THE PARAMETER TEST STANDARD Sediment and water or particles Not to exceed 0.5% in volume Sediments – ASTM D 473Water – Xxxx Xxxxxx API at 60 ºF Higher than 18 API degrees, but lower than 50 API Decrees D 1298 Viscosity @ the temperature of reference Not to exceed 300 cSt at 30 ºC ASTM D 445 or D 446 Vapor Pressure Not to exceed 11 lb / square inchReid Vapor Pressure ASTM D 323 Receipt Temperature Not to exceed 120 ºF Salt contents 20 PTB ASTM D 3230 Fluidity Point Not higher than 12 ºC ASTM D 93 DC – Contrato de Transporte de Crude Oil Transportation Agreement – 008 018 – 2013 82 93 Attachment C Entry and Exit Points