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400999626 19 2016-03-06T12:48:42.28-07:00 10575 8 NORTH LLC

370 17TH STREET SUITE 5300

DENVER CO 80202 Josh Carlisle 720 481-2372 720 481-2372 Josh Carlisle Environmental Supervisor 2016-03-06T12:48:42.28-07:00 2016-03-06T12:48:42.25-07:00 in process jcarlisle 2016-03-03T09:44:42.877-07:00 jcarlisle jcarlisle@extractionog.com 0.00000 jcarlisle@extractionog.com jcarlisle jcarlisle 2016-03-06T12:48:39.843-07:00 400995581 400999626 2016-02-23T00:00:00-07:00 TANK BATTERY BOULDER NWSE 14 1S 69W 6 Y NON-CROP LAND 40's, Sunny, windy 0 0 During routine maintenance a flowline leak was identified and upon excavation and repair hydrocarbon impacted soils were discovered. Impacts are limited to soils. No groundwater was encountered in the excavation. Further investigation will be completed to delineate the extent of impacted material, including excavation and soil sampling. 321416 400995581 false 2016-02-23T00:00:00-07:00 39.963148 -105.078318 OTHER (SPECIFY) Boulder County 0 0 0 true <_x0032_7_approved>false S false 0 Unknown Unknown 0 0 false false false true false 0 2016-02-25T07:41:50.173-07:00 400999626 Local depth to groundwater is unknown due to a lack of public data for the water wells within 1/2 mile of the release. 400999626 400999626 FORM 19 SUBMITTED 400999626.pdf 400999626 400999707 ANALYTICAL RESULTS Brereton Complete Analytical.pdf 888152 400999626 400999708 ANALYTICAL RESULTS Brereton Analytical Table.pdf 106790 400999626 401000703 SITE MAP Brereton Soil Sample Figure 1.pdf 243591 400999626 1 SPILL 2016-02-22T00:00:00-07:00 Boulder County Parks and Open Mindy Carson Hatcher

Phone call. Met on site on the 23rd and discussed remediation plans.

303 678-6025 400999626 2 SPILL 2016-02-22T00:00:00-07:00 Boulder County Patrick Murphy

Phone call. Met on site on the 23rd and discussed remediation plans.

720 887-2278 400999626 1 2016-03-03T00:00:00-07:00 1 0 true false false false false false 14 false On February 23, 2016, a flowline leak was discovered during a routine site visit at the Brereton MD 61S69W14NWSE location. Approximately 500 cubic yards of impacted soil were excavated and transported to the Buffalo Ridge Landfill in Keenesburg, Colorado. Groundwater was not encountered in the excavation. Soil samples were collected from the sidewalls and base of the excavation area and submitted to Summit Scientific Laboratory in Golden, Colorado for analysis of benzene, toluene, ethylbenzene, and total xylenes (BTEX) and total petroleum hydrocarbons (TPH) - gasoline range organics (GRO) by USEPA Method 8260, TPH - diesel range organics (DRO) by USEPA Method 8015. Laboratory results indicate that constituent concentrations in the soil samples in the final extent of the excavation were below the applicable COGGC Table 910-1 standards. Soil analytical results are summarized in Table 1. Final excavation extent and soil sample locations are illustrated on Figure 1. Laboratory analytical reports are included as Attachment A. Based on the soil analytical data, 8 North is requesting a no further action determination (NFA) for this release. Sandy Clay 250 9 1270 1900 1550 0 0 0 0 0 0 false false 0 0 false true true false false false false false true true false true 70 40 Thread was being aborted.