Other Air Emissions

Occidental's oil and gas, chemical and midstream operations generate air emissions including sulfur oxides (SOX), nitrogen oxides (NOX), volatile organic compounds (VOCs) and carbon monoxide (CO), among other substances. These air emissions are generated from boilers, heaters, engines, flares, compressors and other process sources. Occidental's operations employ techniques to monitor and control fugitive emissions of VOCs and other air pollutants, including leak detection and repair (LDAR) programs and infrared (IR) camera detection. Under an LDAR program, the designated equipment is monitored at specified, regular intervals using hand-held portable gas sensors to detect if there are indications of a leak in excess of pre-determined or regulatory thresholds. Detected leaks are then repaired or replaced within a specified time frame. LDAR programs are in place in several of Occidental's oil and gas operations and OxyChem manufacturing locations.

 Estimated emissions of CO and NOX from facilities operated by Occidental increased approximately 13 percent (to 12,000 metric tons) and 19 percent (to 16,000 metric tons), respectively, from 2013 to 2014 (the most recent data available). The increase in estimated CO and NOX emissions was driven primarily by higher gas consumption to facilitate production operations, including those in the Permian Basin and Oman. Emissions of SOX remain unchanged at 12,000 metric tons. SOx emissions are primarily the result of non-routine flaring of produced gas streams in the Permian Basin and Qatar. The amount of flaring in a given period can vary significantly. For example, flaring increases for safety reasons when gas processing plants have periodic plant shutdowns or turnarounds to conduct inspections, and during repair and maintenance that cannot occur during normal operations. The estimated quantity of VOCs emitted decreased approximately 4 percent due to changes in emissions factors at several operations.

Other Air Emissions
(equity share basis)* Thousands Metric Tons

SOx

NOx

VOCs

CO

2011

7

12

37

8

2012

14

14

32

10

2013

12

14

32

10

2014

12

16

30

12