Abbreviated Application for A Certificate of Public Convenience and Necessity Authorizing Facilities Construction, for Reaffirmation of Market-Based Rate Authorization and Request for Expedited Treatment of Tres Palacios Gas Storage LLC under CP12-36.

COPANO PLANT INTERCONNECTION PROJECT RESOURCE REPORT NO. 6 GEOLOGICAL RESOURCES Resource Report No. 6 Geological Resources Copano Plant Interconnection Project December 2011 Tres Palacios Gas Storage LLC i December 2011 COPANO PLANT INTERCONNECTION PROJECT RESOURCE REPORT NO. 6 GEOLOGICAL RESOURCES RESOURCE REPORT 6 GEOLOGICAL RESOURCES SUMMARY OF FILING INFORMATION Found in 1. Identify the location of mineral resources and Section 6.3 any planned or active surface mines crossed Figures 6.3-1 - 6.3-3 by the proposed facilities. ( 380.12(h)(1&2)) Describe hazards to the facilities from Sections 6.2 - 6.4 mining activities, including subsidence, blasting, slumping or landsliding, or other ground failure. 2. Identify any geologic hazards to the proposed Section 6.4 facilities. ( 380.12(h)(2)) Figure 6.4-1 Tables 6.4-1 and 6.4-2 For the offshore this information is needed NA on a mile-by-mile basis and will require completion of geophysical and other surveys before filing. 3. Discuss the need for and locations where Section 6.2 blasting may be necessary in order to construct the proposed facilities. ( 380.12(h)(3)) 4. For LNG projects in seismic areas, the NA materials required by Data Requirements for the Seismic Review of LNG Facilities, NBSIR84-2833. ( 380.12(h)(5)) 5. For underground storage facilities, how drilling NA activity by others within or adjacent to the facilities would be monitored, and how old wells would be located and monitored within the facility boundaries. ( 380.12(h)(6)) Identify any sensitive paleontological Section 6.4.5 resource areas crossed by the proposed Figure 6.4-2 facilities. (Usually only if raised in scoping or required by land-managing agency.) Briefly summarize the physiography and Section 6.1 bedrock geology of the project area. Figures 6.1-1 and 6.1-2 If the application is for underground storage facilities: Describe monitoring of potential effects NA of the operation of adjacent storage or production facilities on the proposed facility, and vice versa; Tres Palacios Gas Storage LLC ii December 2011 COPANO PLANT INTERCONNECTION PROJECT RESOURCE REPORT NO. 6 GEOLOGICAL RESOURCES Found in Describe measures taken to locate and NA determine the condition of old wells within the field and buffer zone and how the applicant would reduce risk from failure of known and undiscovered wells; and Identify and discuss safety and NA environmental safeguards required by federal and state drilling regulations. Tres Palacios Gas Storage LLC iii December 2011 COPANO PLANT INTERCONNECTION PROJECT RESOURCE REPORT NO. 6 GEOLOGICAL RESOURCES Contents 6.0 GEOLOGICAL RESOURCES................................................................................................................... 6-2 6.1 Geologic Setting .............................................................................................................................. 6-2 6.2 Blasting ....................................................