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400329189 15 10338 CARRIZO OIL & GAS INC

500 DALLAS STREET #2300

HOUSTON TX 77002 Tina Taylor 713 328-1000 713 328-1060 Tina Taylor Regulatory Compliance 2012-09-21T06:13:18.863-06:00 DRAFT ttaylor 2012-09-21T06:13:18.863-06:00 ttaylor tina.taylor@crzo.net 0.00000 tina.taylor@crzo.net ttaylor ttaylor 2012-09-21T06:53:00.933-06:00 400329189 R Castor WELD NWNW 36 9N 59W 6 40.712080 -103.930850 Lined 0 N 3145 170 2730 240 210 12 96786 PPL 20 20 Y 36-31-9-59 N 05 123 35005 00 427480 � � � � � � � � � � � � � Planned N N � � Y � Y � � Fresh Water Storage only 400329189 400329190 DESIGN: PLAN AND CROSS SECTION Castor 36-31-9-59 Constr Layout drawing.pdf 538248 400329189 400329191 TOPOGRAPHIC MAP Castor 36-11-9-59 Hyrdo map.pdf 354625 400329189 400329192 OPERATIONS PLAN Castor 36-31-9-59 location drawing.pdf 263850 400329189 400307112 02A Amended 6cf5dd95-5f15-48f7-b0ea-6c6ee1c53638 400329189 4 Site Specific Operator shall not allow any fluids to flow back to the Fresh Water Storage Pit/Pond. 31c8a05b-18ca-45a2-9f4d-045db849e8db 400329189 7 Planning The COGCC to be notified 48 hours prior to construction of the Fresh Water Storage Pit. 56eae0b4-85ee-4d9a-9143-44fe7ddb15c2 400329189 2 Storm Water/Erosion Control Operator has designed the well pad with insloping and a storm water control ditch to prevent storm water run-on/runoff and the release of fluids from the location. See attached Construction Layout Drawing. 65c858e5-2127-4e39-9b4d-631c13fcfd0b 400329189 3 Site Specific Fresh water for the Fresh Water Storage Pit comes from water provider; water sources permitted for consumable industrial use. c070dfa4-c2d3-4228-88d5-650937ac0f98 400329189 8 Drilling/Completion Operations A Form 15 Pit Report will be submitted within 30 days of construction of the fresh water storage pit. 6a973e27-d740-408e-be23-74915488c603 400329189 6 Site Specific The location will be fenced and the fenced area will include the Fresh Water Storage Pit. 5e49706c-b878-4a3b-8569-81f82a455f9a 400329189 5 Site Specific Fresh Water Storage Pit shall contain fresh water only and signage prohibiting the use of the pit for any fluid that does not come from municipal, irrigation or surface water source. d9e58227-ee79-4b22-a371-82462a44801f 400329189 1 Material Handling and Spill Prevention Operator will ensure 110 percent secondary containment for any volume of fluids contained at the well site during drilling and completion. Operator will implement best management practices to contain any unintentional release of fluids. Thread was being aborted.