<_x0034_00993405>

400993405 19 2016-02-22T13:46:07.313-07:00 47120 KERR MCGEE OIL & GAS ONSHORE LP

P O BOX 173779

DENVER CO 80217-3779 Sam LaRue 970 336-3500 970 515-1238 Sam LaRue Senior HSE Representative 2016-02-22T13:46:07.313-07:00 2016-02-22T13:46:07.297-07:00 444846 in process Cwasko 2016-02-22T09:17:16.047-07:00 Cwasko Sam.LaRue@anadarko.com 0.00000 Sam.LaRue@anadarko.com Cwasko Cwasko 2016-02-22T13:46:04.063-07:00 400988955 400993405 GINTAUTAS, PETER 2016-02-12T00:00:00-07:00 TANK BATTERY 05 123 19963 WELD NESE 31 2N 67W 6 Y NON-CROP LAND 50's, Sunny. 0 0 On February 12, 2016, historical hydrocarbon impacts were discovered along a produced water sump dumpline during construction activities at the HSR-Grant Brothers 10-31 production facility. Excavation activities are on-going and are being guided in the field by screening soil for volatile organic compound (VOC) concentrations using a photoionization detector (PID). Confirmation soil samples will be collected from the final extent of the excavation area. Site investigation and excavation activities will be summarized in a subsequent Supplemental Form 19. 400988955 false 2016-02-12T00:00:00-07:00 40.091582 -104.924528 Town of Frederick FEE 0 0 0 false <_x0032_7_approved>false S false Unknown 0 Unknown 0 0 false false true false false 0 2016-02-15T08:11:17.97-07:00 400993405 400993405 FORM 19 SUBMITTED 400993405.pdf 400993405 400993464 TOPOGRAPHIC MAP HSR - Grant Brothers 10-31 - Figure 1.pdf 1097453 400993405 400993563 ANALYTICAL RESULTS Grant Bros 10-31 Analytical Tables and Laboratory Reports.pdf 1508748 400993405 400993670 SITE MAP Figure 2 - Grant Bros Sample Location Map.pdf 458652 400993405 1 SPILL 2016-02-12T00:00:00-07:00 County Roy Rudisill

-Email 400993405 2 SPILL 2016-02-12T00:00:00-07:00 County Troy Swain

-Email 400993405 3 SPILL 2016-02-12T00:00:00-07:00 County Tom Parko

-Email 400993405 4 SPILL 2016-02-12T00:00:00-07:00 Town of Frederick Jennifer Simmons

-Email 400993405 5 SPILL 2016-02-15T00:00:00-07:00 Land Owner Private

-Phone 400993405 1 2016-02-22T00:00:00-07:00 0 0 true true false false false false 10 false On February 12, 2016, historical hydrocarbon impacts were discovered along the produced water sump dumpline during construction activities at the HSR-Grant Brothers 10-31 production facility. Approximately 500 cubic yards of impacted material were excavated and transported to the Front Range Regional Landfill in Erie, Colorado for disposal. Excavation activities were guided in the field by screening soil for volatile organic compound (VOC) concentrations using a photoionization detector (PID). Four (4) soil samples were collected from the sidewalls of the final extent of the excavation area at approximately 8 feet below ground surface (bgs). The soil samples were submitted to Origins Laboratory in Denver, Colorado for analysis for benzene, toluene, ethylbenzene, total xylenes (BTEX), total petroleum hydrocarbons (TPH) - gasoline range organics (GRO) by USEPA Method 8260C, TPH - diesel and oil range organics (DRO and ORO) by USEPA Method 8015, electrical conductivity (EC), and pH. Analytical results indicated that constituent concentrations in soil samples collected from the final extent of the excavation area were below the applicable COGCC Table 910-1 standards. Groundwater was encountered within the excavation area at approximately 10 feet bgs. Approximately 80 barrels of groundwater were removed from the excavation area via vacuum truck and transported to a licensed injection facility for disposal. A groundwater sample (GW01) was subsequently collected from the excavation and submitted for laboratory analysis of BTEX by USEPA Method 8260C. Analytical results received on February 18, 2016, indicated that the benzene concentration in groundwater sample GW01 was above the applicable COGCC Table 910-1 groundwater standard. Prior to backfilling the excavation, approximately 110 pounds of activated carbon were introduced to the groundwater table to mitigate remaining aqueous phase hydrocarbon impacts. Sandy clay to clay. 10 9 725 4965 125 Soil and groundwater analytical results are summarized in Table 1 and Table 2, respectively, and sample locations are illustrated in Figure 2. Additional monitoring/remediation activities will be presented in a forthcoming site-specific Form 27. 0 0 0 0 0 0 false false 0 0 true false true false false false false false true true false true 26 24 0 400993405 1 2016-02-22T00:00:00-07:00 false false true false During construction activities, historical hydrocarbon impacts were discovered along the produced water sump dumplines. All associated fittings and equipment were working properly and showed no indication of leaking. The tank battery will be rebuilt with a geosynthetic liner and a double-walled fiberglass produced water sump. 500 true false false 80 0 Thread was being aborted.