MWSS Weekly Order 1067 Update Chevron 4/15/2015

Out of Reservoir Tilt Events in MWSS 21S EO1067 area from 4/8/2015 to 4/15/2015 Map as per DOGGR’s letter Tilt event Activity Summary Offset Operator (TRC): 1 Out of Reservoir Tilt Event in TRC Lease within 800’ of the expression started on April 13 th (event # 04 13A) and currently still ongoing. Pinnacle report shows steam injection into well Kelly 22 (similar to past events on March 4 th and April 1 st ) Chevron: 1 Out of Reservoir Tilt Events in Chevron Lease within 800’ of the expression started on April 8 th (event # 04/08A) and lasted 2 days Chevron is not steaming within 800’ of the expression at this time. Event # 04 13A Event # 04 08A

Event # 04/13A (Out of Reservoir) Uplift and an Out of Reservoir Event observed on April 13 th (on TRC) April 13 th (Field Surface Deformation 12hr map) UPDATE

Out of Reservoir Tilt Events in MWSS 21S EO1067 area Pinnacle’s report on Event # 04 13A

Well 20 Sump Volumes (1/1/2014 – 4/15/2015) 4/8/15– 4/15/15 Date 15 day Avg. Volume pulled (bbls) Daily Volume pulled (bbls) 4/8/ /9/ /10/ /11/ /12/ /13/ /14/ /15/ Start/End of Phase 3 test Start of Chevron Test outside EO1016 (validation of April 13 Well 20 Flow Event) End of Chevron Test outside EO1016 (validation of April 13 Well 20 Flow Event) Estimated start of TRC steaming in DOGGR Limited Injection Zone Phase 3 Testing rescinded, 200' limited injection zone set and request for a geotechnical study Uplift observed on March 2nd on NE side of the lease line and a subsequent Out of Reservoir Event on March 4th (TRC), similar situation occurred on April 1 st (TRC) and April 13 th (TRC) Out of Reservoir Event on April 8 th (CVX) after TRC’s event (on April 1 st )

Well 20 Sump ( 4/15/2015) Visual Observations: No new seep locations. Low energy seep re-started near our Can 5 on April 10 th and is still flowing UPDATE

Chevron MWSS 21S Property Line and Well 20 Sump “21S Restricted Entry Area” Do not enter red outlined area without approved safety plan N Outline of restricted area 22S TRC 21S CVX Photo 2 March 2015 Red outlined area should not be entered without approval of the Chevron 21S Diatomite OS. Site specific safe work plans must be developed and approved prior to entry. Well 20 Sump Expression Area 21S Property Line (dashed line) & Unstable Bank Area Due to the instability of the embankment between CVX and TRC properties, Chevron has extended the Do Not Enter Area (“21S Restricted Area”) to include the area from the embankment to the flow lines that run west of Chevron wells H225 and 204R. The K-rails no longer define the Do Not Enter Area and will be removed. This area is outlined in red on the aerial photo. Chevron requests that no one enters the red outlined area without contacting the Chevron Operations Supervisor and developing a written safe work plan prior to entry. The Chevron Supervisor can be contacted at Chevron will work with the DOGGR to safely obtain photos or other data in this area if access to this area is required.