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400870178 19 2015-07-17T08:01:31.327-06:00 69175 PDC ENERGY INC

1775 SHERMAN STREET - STE 3000

DENVER CO 80203 Zachary Liesenfeld 970 5069273 970 3736581 Zachary Liesenfeld EHS Professional 2015-07-17T08:01:31.327-06:00 2015-07-17T08:01:31.313-06:00 442474 in process Zliesenfeld 2015-07-17T06:57:14.5-06:00 Zliesenfeld Zack.Liesenfeld@yahoo.com 0.00000 Zack.Liesenfeld@yahoo.com Zliesenfeld Zliesenfeld 2015-07-17T08:01:29.78-06:00 400866001 400870178 ALLISON, RICK 2015-07-08T00:00:00-06:00 TANK BATTERY WELD SWSE 22 5N 67W 6 N CROP LAND Cloudy 0 0 Historic release discovered around outside of produced water vault. Wells were shut, vault emptied, and excavation of contaminated material began. Soil ecountered during excavation was field sceened for VOC using a PID. 331006 400866001 false 2015-07-08T00:00:00-06:00 40.378226 -104.875893 FEE Harlen Hankins 0 1 0 true <_x0032_7_approved>false S false 0 0 Unknown 0 0 true false false true false 0 2015-07-10T09:04:12.877-06:00 Historic release located around the outside of water vault 400870178 Form 27 does not yet have a doc #. Please find form attached. 400870178 400870178 FORM 19 SUBMITTED 400870178.pdf 400870178 400869409 19A Spill/Release Report (Supplemental) 400870178 1 SPILL 2015-07-10T00:00:00-06:00 State of CO Rick Allison

via email

400870178 2 SPILL 2015-07-10T00:00:00-06:00 Weld County Roy Rudesil

via email

400870178 1 2015-07-17T00:00:00-06:00 0 0 true false false false false false 19 false On July 8, 2015, a historic release was discoved during removal of a concrete produced water vault on Hankins 22-41, 42-44; 22D production facility. About 940 C.Y. of impacted material was removed and transported to the Waste Management Facility in Ault, CO for disposal. Soil encountered during excavation area was field screened for volatile organic compound (VOC) concentrations using a PID. Soil samples were collected from the side walls and base of the excavation area at depths ranging between 10-19 feet below ground surface (bgs). Soil samples were submitted to Summit Scientific Labs in Golden, CO for analysis of benzene, toluene, ethylbenzene, and total xylenes, naphthalene, and total petroleum hydrocarbons (THP)-gasoline range organics (GRO) by USEPA Method 8260B, and TPH-diesal range organics (DRO) by USEPA Method 8015. The soil sample (SS04) collected from the base of the final excavation extent below the former produced water vessel was also submitted for analysis of pH and electrical conductivity (EC). Analytical results indicated soil samples collected from the final exstent of the excavation area exhibited constituent concentrations below COGCC Table 910-1 soil standards. Soil analytical data is summarized in Table 1 and the laboratory analytical reports are included as Attchment A. The excavation exstent and soil samples locations are illustrated on Figure 2. Based on the soil analytical data described herein, PDC is requesting a NO Further Action (NFA) request for this release. Colby loam, 3 to 5 percent slopes 33 3 550 1045 780 PDC is requestion a produced water tank closure for this location, as described in the attached Form 27. 0 0 0 0 0 0 0 0 false false 0 0 false false true false false false false false true true false true 60 45 Historic release 400870178 1 2015-07-17T00:00:00-06:00 false false true false A historic release was discoved during the removal of a concrete produced water vault. The concrete vault will be replaced with a fiberglass produced water vault. Routine maintenance activies will be completed. 940 true false false 0 0 Thread was being aborted.