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Title: Annual Post-Closure Inspection and Monitoring Report for Corrective Action Unit 329: Area 22 Desert Rock Airstrip Fuel Spill, Nevada Test Site, Nevada, with Errata Sheet, Rev. No.: 1

Abstract

This report presents the data collected during field activities and quarterly soil-gas sampling activities conducted from May 9, 2005, through May 20, 2006, at Corrective Action Unit (CAU) 329, Area 22 Desert Rock Airstrip (DRA) Fuel Spill; Corrective Action Site (CAS) 22-44-01, Fuel Spill. The CAU is located at the DRA, which is located approximately two miles southwest of Mercury, Nevada. A risk evaluation was added to the scope of the project to determine if the residual concentration of the hazardous constituents of JP4 pose an unacceptable risk to human health or the environment and if a corrective action was required at the site, because the current quarterly monitoring program is not expected to yield a rate constant that could be used effectively to determine a biodegradation rate for total petroleum hydrocarbons (TPH) in less than the initial five years outlined in the CR. Additionally, remediation to the Tier 1 action level for TPH is not practical or technically feasible due to the depth of contamination. Field activities were conducted under the Addendum to the CR to collect sufficient data to determine the rate of biodegradation for TPH contamination at CAU 329 to support closure requirements. Reconstruction of the monitoringmore » system at the site and quarterly soil-gas sampling were conducted to collect the required data. Because existing Wells DRA-0 and DRA-3 were determined to be insufficient to provide adequate data, soil-gas monitoring Wells DRA-10 and DRA-11 were installed. Two soil-gas sampling events were conducted to establish a baseline for the site, and subsequent quarterly sampling was conducted as part of the quarterly soil-gas sampling program. In addition, soil samples were collected during well drilling activities so comparisons might be made between the initial soil contamination levels in 2000 and the concentrations present at the time of the well installation.« less

Authors:
Publication Date:
Research Org.:
Stoller-Navarro Joint Venture
Sponsoring Org.:
USDOE
OSTI Identifier:
897542
Report Number(s):
DOE/NV-1156-REV. 1
TRN: US200705%%141
DOE Contract Number:
DE-AC52-03NA99205
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; BIODEGRADATION; CLOSURES; CONTAMINATION; EVALUATION; HYDROCARBONS; MERCURY; MONITORING; NEVADA; NEVADA TEST SITE; PETROLEUM; SAMPLING; SOILS; WELL DRILLING

Citation Formats

Wickline, Alfred. Annual Post-Closure Inspection and Monitoring Report for Corrective Action Unit 329: Area 22 Desert Rock Airstrip Fuel Spill, Nevada Test Site, Nevada, with Errata Sheet, Rev. No.: 1. United States: N. p., 2007. Web. doi:10.2172/897542.
Wickline, Alfred. Annual Post-Closure Inspection and Monitoring Report for Corrective Action Unit 329: Area 22 Desert Rock Airstrip Fuel Spill, Nevada Test Site, Nevada, with Errata Sheet, Rev. No.: 1. United States. doi:10.2172/897542.
Wickline, Alfred. Mon . "Annual Post-Closure Inspection and Monitoring Report for Corrective Action Unit 329: Area 22 Desert Rock Airstrip Fuel Spill, Nevada Test Site, Nevada, with Errata Sheet, Rev. No.: 1". United States. doi:10.2172/897542. https://www.osti.gov/servlets/purl/897542.
@article{osti_897542,
title = {Annual Post-Closure Inspection and Monitoring Report for Corrective Action Unit 329: Area 22 Desert Rock Airstrip Fuel Spill, Nevada Test Site, Nevada, with Errata Sheet, Rev. No.: 1},
author = {Wickline, Alfred},
abstractNote = {This report presents the data collected during field activities and quarterly soil-gas sampling activities conducted from May 9, 2005, through May 20, 2006, at Corrective Action Unit (CAU) 329, Area 22 Desert Rock Airstrip (DRA) Fuel Spill; Corrective Action Site (CAS) 22-44-01, Fuel Spill. The CAU is located at the DRA, which is located approximately two miles southwest of Mercury, Nevada. A risk evaluation was added to the scope of the project to determine if the residual concentration of the hazardous constituents of JP4 pose an unacceptable risk to human health or the environment and if a corrective action was required at the site, because the current quarterly monitoring program is not expected to yield a rate constant that could be used effectively to determine a biodegradation rate for total petroleum hydrocarbons (TPH) in less than the initial five years outlined in the CR. Additionally, remediation to the Tier 1 action level for TPH is not practical or technically feasible due to the depth of contamination. Field activities were conducted under the Addendum to the CR to collect sufficient data to determine the rate of biodegradation for TPH contamination at CAU 329 to support closure requirements. Reconstruction of the monitoring system at the site and quarterly soil-gas sampling were conducted to collect the required data. Because existing Wells DRA-0 and DRA-3 were determined to be insufficient to provide adequate data, soil-gas monitoring Wells DRA-10 and DRA-11 were installed. Two soil-gas sampling events were conducted to establish a baseline for the site, and subsequent quarterly sampling was conducted as part of the quarterly soil-gas sampling program. In addition, soil samples were collected during well drilling activities so comparisons might be made between the initial soil contamination levels in 2000 and the concentrations present at the time of the well installation.},
doi = {10.2172/897542},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Technical Report:

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  • This report presents the data collected during field activities and quarterly soil-gas sampling activities conducted from May 9, 2005, through May 20, 2006, at Corrective Action Unit (CAU) 329, Area 22 Desert Rock Airstrip (DRA) Fuel Spill; Corrective Action Site (CAS) 22-44-01, Fuel Spill. The CAU is located at the DRA, which is located approximately two miles southwest of Mercury, Nevada, as shown in Figure 1-1. Field activities were conducted in accordance with the revised sampling approach outlined in the Addendum to the Closure Report (CR) for CAU 329 (NNSA/NSO, 2005) to support data collection requirements. The previous annual monitoringmore » program for CAU 329 was initiated in August 2000 using soil-gas samples collected from three specific intervals at the DRA-0 and DRA-3 monitoring wells. Results of four sampling events from 2000 through 2003 indicated there is uncertainty in the approach to establish a rate of natural attenuation as specified in ''Streamlined Approach for Environmental Restoration (SAFER) Work Plan for Corrective Action Unit 329: Area 22 Desert Rock Airstrip Fuel Spill, Nevada Test Site, Nevada'' (DOE/NV, 1999). As a result, the Addendum to the CR (NNSA/NSO, 2005) was completed to address this uncertainty by modifying the previous approach. A risk evaluation was added to the scope of the project to determine if the residual concentration of the hazardous constituents of JP4 pose an unacceptable risk to human health or the environment and if a corrective action was required at the site, because the current quarterly monitoring program is not expected to yield a rate constant that could be used effectively to determine a biodegradation rate for total petroleum hydrocarbons (TPH) in less than the initial five years outlined in the CR. Additionally, remediation to the Tier 1 action level for TPH is not practical or technically feasible due to the depth of contamination.« less
  • There was an increase in total petroleum hydrocarbons (TPH) concentrations at all three depths within Borehole DRA-0. The oxygen concentration at 40 ft below ground surface (bgs) decreased. There was also an increase in carbon dioxide concentration at that depth. The decrease in oxygen concentrations and the increase in carbon dioxide concentration at the 40 ft bgs level could be possible indicators of natural attenuation. It is not possible to determine trends or biodegradation rates with the limited amount of data collected from the site. The sample results from this first monitoring period did not correlate with the baseline resultsmore » collected in August 2000. Additional samples will be collected and the results will be compared to previously collected samples to determine if the site was at equilibrium in August 2000. Continued annual monitoring will be conducted as specified in the Closure Report to determine trends at the site. As natural attenuation occurs, the TPH concentrations should decrease. The TPH concentrations will be compared over successive monitoring events to determine trends and approximate rates. As natural attenuation occurs, oxygen will be consumed and carbon dioxide will be produced. The oxygen, nitrogen, and carbon dioxide concentrations will also be evaluated to determine if biodegradation is indicated. When all available oxygen has been consumed, methane-producing bacteria may continue the natural attenuation process so methane levels will be monitored as an additional possible indicator of natural attenuation. The rate of decrease will be determined on the microbial populations, contaminant concentrations, available nutrients, and other environmental factors. Samples were collected and submitted for microbial analysis during closure activities. The results indicated that the microbial populations and nutrients were adequate for limited bioremediation (DOE/NV, 2000). Additional sampling for microbial analysis are not planned. The site is currently inactive and the source of additional contamination was removed. It was determined during closure activities that the wetting front has stabilized. Monitoring of Borehole DRA-3 has not shown any indications of contamination. Contamination migration to the water table is not expected based on current site conditions.« less
  • The following is an addendum to the ''Closure Report for Corrective Action Unit 329: Area 22 Desert Rock Airstrip Fuel Spill, Nevada Test Site, Nevada'', DOE/NV-641. This new information is based on the results of post-closure monitoring data that was not available at the time DOE/NV--641 was issued. This addendum replaces: Section 4.0, ''Closure Verification Results,'' in its entirety; renumbers Section 5.0, ''References'' to Section 6.0, ''References''; and introduces a new Section 5.0, ''Conclusions and Recommendations.'' The list of acronyms and references only contains additions to the original document.
  • This plan was prepared as a characterization and closure report for Corrective Action Unit (CAU) 329: Area 22, Desert Rock Airstrip (DRA) Fuel Spill identified in the Federal Facility Agreement and Consent Order (FFACO). The CAU, located on the Nevada Test Site, consists of one Corrective Action Site (CAS), 22-44-01, which encompasses an area contaminated by three recorded spills from a 25,000-gallon underground fuel storage tank. The tank was installed in 1980 and was imbedded in sand and gravel approximately 16 feet below the ground surface. Historically, the DRA consisted of a single runway, several portable buildings, two underground storagemore » tanks containing aviation jet fuel, and plumbing to several refueling areas on the ramp. The constituents of potential concern from the spill were total petroleum hydrocarbons as gasoline or JP-4. This provides the methodology for sampling contaminated soil-vapor and soil to determine what activities, if any, are required for closure of this si te. In addition, there is sufficient process knowledge of the tank's historical use to recommend closure of CAU 329 using the Streamlined Approach for Environmental Restoration (SAFER) process. This process combines elements of the Data Quality Objectives process and the observational approach to help plan and conduct corrective actions. The study concluded that the spill is localized; therefore, it is very unlikely that the underground water supply has been or will be affected by these spills. In addition, there were high levels of carbon dioxide detected above the release which indicate that the spill is currently in the process of undergoing biological degradation and is not migrating. This CAU has been approved by the Nevada Division of Environmental Protection (NDEP) to be moved into Appendix III of the FFACO. Closure is expected to be in-place with administrative controls and soil-vapor sampling. A closure report will be prepared and submitted to NDEP for review and approval upo n completion of the field activities.« less
  • In Appendix 0, Use Restriction (UR) Form, the drawing of the use restricted area shows the incorrect coordinates for the use restricted area, the coordinates on the drawing do not match the approved UR Form. The coordinates have been verified and this Errata Sheet replaces the drawing of the use restricted area with an aerial photo showing the use restricted area and the correct coordinates that match the approved UR Form.