DSHW-2015-009809 - 0901a0688057d2ad

Orbital ATK
September 14,2015
8200-FY16-034
Mr. Scott T. Anderson, Director
Utah Department of Environmental Quality
Division of Solid and Hazardous Waste
195 North 1950 West
P.O. Box 144880
Salt Lake City, Utah 84114-4880
Div of Waste Management
and Radiation Control
SEP 1 5 2015
DSHW- Zo\5 - OO°i(d0°\
Re: ATK Launch Systems Promontory M-136 Post Closure Permit, Spring 2015 Semi-annual
Groundwater Report, Promontory EPA ID #UTD009081357
Dear Mr. Anderson:
Attached is the ATK Launch Systems Promontory Facility M-136 LTTA Post Closure Permit,
Spring 2015 Semi-annual Groundwater Report.
If you have questions regarding this report, please contact Paul Hancock at [phone].
/ certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.
Sincerely,
George Gooch, Manager
Environmental Services
ATK Launch Systems Inc.
Orbital ATK, Inc. • P.O. Box 707, Brigham City, UT 84302 • 435-863-3511
Div of Wast . ' jnagement
and Radiation Control
SEP 1 5 2015
DSM-IA/- 2ol 5- oogflO0)
M-136 LTTA
POST-CLOSURE PERMIT
2015 SPRING SEMI-ANNUAL REPORT
Orbital ATK
ATK Launch Systems
Promontory Facility
September 2015
Preface
This semi-annual report is submitted to the Utah Division of Waste Management
and Radiation Control to comply with requirements of the Promontory M-136
LTTA Post-Closure Permit. This report contains data and information compiled
during the first half of 2015 which was obtained from wells sampled according to
the Permit. This report is intended to be read in conjunction with previously
submitted interim and semiannual reports, and the Post-Closure Permit
Application.
In September 2007, ATK Launch Systems received a reissued post-closure
permit for the M-136 Liquid Thermal Treatment Area (LTTA). As modified on
May 5, 2011 (Table IV-2 and Sections IV.E.3 and IV.E.4), the September 15
semi-annual report submittal requires results of sample analyses including
concentrations of hazardous constituents and a summary of QA/QC data. It also
includes identification of potential hot spots or locations meriting further
investigation. A CD is included with analytical results in an electronic format.
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Table of Contents
Preface ii
Table of Contents iii
Appendices iv
1.0 Ground Water Sampling 1
1.1 Introduction 1
1.2 Analytical Results of Ground Water Sampling 1
2.0 Locations Warranting Further Investigation 3
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Appendices
APPENDIX A Analytical Data - Volatiles
APPENDIX B Analytical Data - Perchlorate
APPENDIX C Analytical Data Sheets
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Orbital ATK Promontory Post-Closure Permit
Spring 2015 Semi-Annual Report
Section 1.0
Ground Water Sampling
1.1 INTRODUCTION
The spring 2015 groundwater monitoring effort consisted of sampling 21 wells, 1
piezometer and four springs on the approved sampling list. The sampling of
these wells and springs was previously approved by the Utah Division of Waste
Management and Radiation Control.
Wells sampled were: A-5, B-6, C-1, D-1, D-2, D-4, D-5, D-6, G-1, G-8, EW-6, H-
1, H-2, H-3, H-4, H-6, H-7, J-1, P-7, P-10, M-39B1, and piezometer BC-3. Well P-
10 was dry. Springs sampled were: Pipe Spring and Shotgun Spring, Fish
Spring, Horse Spring. QA/QC replicate samples were collected from Wells D-4,
D-5 and H-4.
1.2 ANALYTICAL RESULTS OF GROUND WATER SAMPLING
A summary of the ground water analytical results, by constituent, are shown in
Appendices A and B. These Appendices list individual parameters for each well
by constituent, well number, lab, sample date, concentration, Estimated
Quantification Limits (EQL), units, lab sample ID and dilution. Also included in
the summary are the data for the field blanks. Appendix C contains the
laboratory reports containing the analytical data and QA/QC for ground water
samples.
Samples were collected, preserved, and transported according to the approved
sampling plan. Samples were analyzed according to USEPA approved methods.
Field blanks, trip blanks and replicates were collected, which represent at a
minimum 10% of the total samples. The laboratory provided method blanks,
spikes, and duplicates, and the results are located in Appendix C. Qualifiers as
defined by the EPA Contract Lab Program were used where applicable (organic
analyses).
A review of the field QA/QC data shows some low J flagged detections of
methylene chloride in trip blanks and field blanks. Methylene chloride is a
common laboratory contaminant and the trace amounts are below levels of
concern. Trip Blank 2 (TB2) had a detection of 7 ppb perchlorate. The source of
this perchlorate is being investigated in the laboratory as a possible cross
contamination source. Trip Blank 1 (TB1) had a J flagged detection of 2.5 ppb
trichloroethene, this is believed to be a carryover from a high concentration
sample. The concentration is low and it is not systemic of the entire sample
group.
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Orbital ATK Promontory Post-Closure Permit
Spring 2015 Semi-Annual Report
The laboratory QA/QC was found to be within acceptable limits and the data was
determined to be usable.
Section 2.0
Locations Warranting Further Investigation
Some of the M-136 historic source area wells were sampled during this sampling
event these included C-1, D-2, D-4, D-5, D-6 and A-5. These wells appeared to
be relatively stable in perchlorate concentrations but showing overall a downward
trend. ATK has had discussions with UDWMRC regarding these wells and it
was determined based on additional modeling and research that ongoing
operations were not contributing to the perchlorate fluctuations seen in these
wells. ATK will continue to periodically monitor these wells to assess the long
term effects of the vegetable oil treatment, and to compare future data collected
to the groundwater model projections.
Well H-4 showed a spike in perchlorate concentrations during this sampling
event. The previous sample from the fall of 2014 showed a decline in
perchlorate concentrations. ATK plans additional sampling during future semi-
annual sampling events to determine if this is an ongoing trend. These
perchlorate concentration variations are indicative of slug flow contaminant
movement in the groundwater. Results for Wells H-1, H-2, H-6 and H-7 have
shown perchlorate detections where previous sampling has been non-detect.
Piezometer BC-3 was sampled and also had a detection of perchlorate. There is
uncertainty about these new detections; therefore samples will be collected again
during the fall semi-annual sampling.
Shotgun spring has shown an up and down trend in perchlorate concentrations
during the previous sampling events. This spring sampling event showed that
concentrations are up. Pipe spring continues to vacillate up and down in
perchlorate concentrations but currently shows a general upward trend. TCE
concentrations in both shotgun and pipe springs are showing up and down
fluctuations and a general upward trend. ATK continues to monitor these springs
on a semi-annual basis.
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