The increase in operating expenses was primarily due to higher system maintenance and repair costs at LOU and Yscloskey mothballing expenses.
Six Months Ended June 30, 2013 Compared to Six Months Ended June 30, 2012
The six month results were impacted by the same factors as discussed above for the three month comparison of 2013 to 2012.
Logistics and Marketing SegmentsLogistics Assets The Logistics Assets segment is involved in transporting, storing and fractionating mixed NGLs; storing, terminaling and transporting finished NGLs; and storing and terminaling refined petroleum products and crude oil. The Partnership's logistics assets are generally connected to, and supplied in part by its Gathering and Processing segments and are predominantly located in Mont Belvieu, Texas and Southwestern Louisiana. The following table provides summary data regarding results of operations of this segment for the periods indicated:
|Three Months Ended June 30,||Six Months Ended June 30,|
|($ in millions)|
|Operating statistics (1):|
|Fractionation volumes, MBbl/d||256.6||311.3||257.3||302.5|
|LSNG treating volumes, MBbl/d||19.4||27.1||22.6||23.1|
|Benzene treating volumes, MBbl/d||16.9||23.7||18.8||20.4|
|(1) Segment operating statistics include intersegment amounts, which have been eliminated from the consolidated presentation. For all volume statistics presented, the numerator is the total volume sold during the quarter and the denominator is the number of calendar days during the quarter.|