8341-14E Spill Report - Field Response 01-10-011-07 W2M Battery Prepared for: Harvest Operations Corp Prepared by: Vertex Professional Services Ltd. Date: January, 2014 General Information Report Date: January 8, 2014 File Number: 8341-14E Client: Harvest Operations Corp Location: 01-10-011-07 W2M UWI: Battery Landowner: Ocean Man First Nation c/o Phone: Tenant: Hoffman and Associates Ltd. Phone: 306-621-7797 Spill Details Spill Date: May 22, 2014 Spill Type: Emulsion Facility Type: Battery % ON lease: 0% Spill Volume (m3): unknown Spill Area (m2): 4418 Recovered Volume (m3): 0 Fluid disposal: The only recovered product came from the purging of the emulsion line and was disposed of in a Harvest facility Comments: The spill occurred west of the battery resulting from a ruptured flow line. There were three flow lines running parallel in a common corridor. The spill ran south towards a large water body. Landscape Details Current Land Use: The spill occurred on Ocean Man First Nation crop land that was seeded to oats. Adjacent Land Use: The adjacent land use is either cultivation or pasture owned by the Ocean Man First Nation Slope (%) and direction: <2% sloping towards the south Soils observed: Proximity to Residence: None within 500 m Proximity to Waterbody: Numerous pothole sloughs adjacent to the site Proximity to Livestock: None on 1/4 section Proximity to Other: Affected Receptors: The large water body at the southern boundary of the spill area did come in contact with the spill. Water samples indicated that there were no adverse affects to the water chemistry. Applicable Spill Background Information Landowner Conversation: Hoffman and Associates Ltd. (Dave Hoffman) represents the Ocean Man First Nation and they have been updated to the progress of the spill cleanup activities Operator Comments: A historical spill occurred west of the current spill area. Spill cleanup activities on this site are coordinated by Summit. Spill Cause Details: The spill was caused by a ruptured flow line. Notification to Regulator: Harvest Operations personnel contacted the Ministry of Economy - Petroleum Development Branch to report the spill. Vertex Professional Services Remedial Event Log Date: July 8, 2014 Site activities: Vertex personnel responded to an emulsion spill communicated by Harvest Environmental Coordinator. The spill details were reviewed with operations representative Rolland Vienneau at the spill site. Meanwhile, current tenant, Dennis Smith, was removing livestock from the pasture adjacent to the south extent of the potentially affected wetland down gradient of the break point. A vac truck was utilized to purge flow line. The fluid was disposed of in a Harvest owned facility. Harvest operations personnel arranged a labour crew to monitor and deter any wildlife, birds, waterfowl from entering or occupying the potentially affected wetland areas. Operations also arranged deployment of a propane wildlife deterrent cannon to be placed at the edge of the large wetland. Date: July 9, 2014 Site activities: Two water samples were collected from the small slough, WS-5 near the entrance and WS-6 near the center. Field screening for chloride was below the detectable limit for each of 32 mg/L Vegetation along the spill pathway is visibly affected (brown and wilted) and appears to have nearly stopped at the shore of the large wetland area to the southwest An affected pathway approximately 0.3m wide and 0.6m long entered the wetland area and therefore water samples were collected. WS-1 is assumed to be from the most affected area (apparent by the vegetation stress) in the east half of the spill path with chloride readings of 1681 mg/L. The water samples taken from the west half of the spill path (WS-2) had chloride readings of 326 mg/L. Two water samples were taken from the south side of the large slough; WS-3 and WS-4 both had chloride concentrations of 146 mg/L. Vertex staff completed an EM38 and an EM31 survey of the spill area to background extents. The battery, spill area, and surface features around the site were mapped utilizing a Trimble GPS. Water samples were sent to ALS Laboratories for analysis. Date: July 10, 2014 Site activities: A tracked excavator was used to scrape the southern portion of the spill area adjacent to the large wetland and a berm was constructed to protect the large wetland from any potential surface runoff. As the excavation continued, field screening was completed using an EC soil probe measuring relative soil conductivity. Excavated depth in the southern portion of the spill area ranged from 0.15 to 0.5 mbgs. Along the sloping portion of the spill pathway, ranged between 0.05 and 0.15 m. Date: July 14 - 15, 2014 Site activities: Swamp matting was deployed as required for access and egress to the spill area due to adverse soil conditions and excessive traffic. Date: July 16, 2014 Site activities: An additional tracked excavator was used to assist in impacted soil excavation. The pipeline corridor was daylighted using hydrovacs. The contaminated hydrovac slurry was stored within the spill area and blended with impacted soil from the spill area. Date: July 16, 17, 21, and 22, 2014 Site activities: An additional tracked excavator was used to assist in impacted soil excavation. The pipeline corridor was daylighted using hydrovacs. The contaminated hydrovac slurry was stored within the spill area and blended with impacted soil from the spill area. All areas were field screened with a handheld EC soil probe as the excavation progressed. Date: July 29 - August 1, 2014 Site activities: A total of 1735.4 tonnes were hauled to Gibson's Heward, SK Landfill. Date: August 5, 2014 Site activities: Removed fluid from excavation and disposed of it in cell onsite. Date: August 6, 2014 Site activities: Sampled the excavation and spill area in a grid pattern and field screened. Areas of elevated EC and Cl were excavated and stockpiled on site. The total area and the sample locations were GPS'd utilizing a Trimble unit. Vertex Professional Services Date: August 11, 2014 Site activities: Scouted potential dugout locations with Boyes Contracting's Kevin Dunham. Dave Hoffman gave 4 potential dugout locations to utilize for backfill material. Date: September 15-24, 2014 Site activities: Re-sampled all previously elevated sample points at depth intervals of 0-0.15 m and 0.15-0.30 m. Field screened samples for EC and Chlorides, and further excavated areas of elevated EC levels and Chloride concentrations. A vacuum truck removed free liquid from excavation and hauled to Gibson's Midale, SK disposal facility. A hydrovac was implemented to expand excavation over the third line. All hydrovac mud was mixed in the cell for disposal Date: October 7-8, 2014 A total of 691.9 tonnes of stockpiled impacted material was hauled to Gibson's Heward, SK Site activities: Landfill. Date: November 21, 2014 Site activities: A supplementary EM survey was completed over the spill area Date: December 1, 2014 Site activities: The spill area was sampled based on the results from the EM survey. Date: December 9-11, 2014 Site activities: Additional impacted soil with elevated EC and Chloride concentrations was excavated. A total of 399.7 tonnes were hauled to Gibson's Heward, SK Landfill. Date: January 29, 2015 Site activities: Met Dave Hoffman the representative for Ocean Man First Nation and spotted 4 dugout locations for backfill material. Dave took with him copies of the Harvest dugout placement forms to be signed by Ocean Man First Nation council. A tractor and blade combination was used to plow snow at these locations in preparation for excavation. Date: February 25-March 6, 2015 Excavated exceedances on sample point #9. A total of 52.9 tonnes of soil was hauled to Gibson's Disposal. Completed the excavation of the four dugouts. Site activities: Date: March 9, 2015 Site activities: Started hauling topsoil from dugout locations to 01-10-011-07 W2M. Shut down early due to muddy site conditions. Tridem end dumps were implemented to haul topsoil adjacent to the spill area. Backfill activities started at south end moving north towards pipeline ROW using a dozer and excavator. A Hydro-vac was used to remove snow from the pipeline ROW and expose pipelines for sand cover. Date: March 10, 2015 Site activities: Hauled clay and topsoil from the dugout locations to 01-10-011-07 W2M. Shut down early due to deteriorating site conditions. Shane & Ryan of Harvest Operations arrived on site to supervise sand padding of pipeline. Track-hoe began with sand padding. After sand padding, clay was spread on top of pipeline ROW with track-hoe - assisted by dozer operator. Shane left site after pipe was adequately covered. Date: March 11, 2014 Site activities: Hauled clay and topsoil from dugout locations to 01-10-011-07 W2M. Started earlier to run on the frost as long as possible. A tractor and blade combination was used to plow a new trail into the dugout location and level the ruts on the previous trail. Additional topsoil is required to restore adequate topsoil depth. No further shading of topsoil was done to avoid admixing. Future work is required once site conditions improve. Vertex Professional Services Discussion As per SPIGEC criteria for Produced water spill assessment, soil samples were analyzed for 'Detailed Salinity,'. All confirmatory soil samples were within SPIGEC's Electrical Conductivity (EC) un conditional land use criteria excluding HA14- 001 with an EC of 24.5 dS/m at 0-15 cm and 13.8 dS/m at 30 -50 cm below surface, HA14-002 with an EC of 53.9 dS/m at 0- 15 cm and 22.5 dS/m at 30-50 cm below surface, and HA14-008 with an EC of 8.36 dS/m .