DSHW-2005-005366 - 0901a06880158616

ATK
ALLIANT TECHSYSTEMS
31 March 2005
8200-FY05:ST083
Mr. Dennis R. Downs, Executive Secretary
State of Utah
Department of Environmental Quality
Division of Solid and Hazardous Waste
288 N. 1460 W.
P.O. Box 144880
Salt Lake City, Utah 84114-4880
ATK Thiokol Inc.
P.O. Box 707
Brigham City, UT 84302-0707
Tel [phone]?]
Fax [phone]
RECEIVED
APR 0 4 mb
UTAH DIV/SIOW Of
SOLID & HAZARDOUS VVASTE
Dear Mr. Downs
ATTENTION: Jeff Vandell
Subject: Semi-Annual RFI Progress Report
As required by Section VIIH of Thiokol Corporation's Post Closure Permit, the following semi-
annual RFI progress report is submitted for your review. The reporting period covered by this
report is 1 September 2004 - 1 March 2005.
Included is information on a new Solid Waste Management Unit # 677, a perchlorate spill site
located at M- 721,and results of passive soil gas work at three potential VOC source locations.
If you have any questions regarding this report, please direct them to myself at [phone].
Sincerely
"^V^ V c^
Paul V Hancock, Manager
Environmental Remediation
c: Don Ostler, Director, Division of Water Quality
SEMI-ANNUAL RFI PROGRESS REPORT
1 September 2004 - 1 March 2005
ATK Thiokol Promontory Facility
1. Description and estimation of the percentage of the RCRA Facilities
Investigation completed
A new SWMU was identified in February 2005 at building M-721 and designated
as #677. This is an Ammonium Perchlorate (AP) reclamation facility. This
SWMU was the result of a release of ammonium perchlorate in November 2004.
Approximately 25 gallons of a high percent solution of perchlorate were released
when excess foaming in a process tank caused a vent to overflow. This fiow went
onto a concrete pad and then to the surrounding soil. Soil was removed from the
site in an attempt to get to reach Region Nine PRG residential levels in soil
(8ppm). After repeated excavations, it was detennined that levels of perchlorate
were still high, but to continue digging the high areas would effect the structural
integrity of the building pad and steam line. Depths of 4.5 feet were reached in
areas of higher concentrations and approximately 54 yd"' of soil were removed.
The level of perchlorate in the final excavation ranged from 1680 ppm to 6150
ppm. Another remediation or removal process will need to be implemented in the
future. An attached sketch (Figure 1) shows the SWMU location relative to the
building.
In 2004, Thiokol conducted additional Passive Soil Gas Survey work at Solid
Waste Management Units #551 (old drum storage area), M-39 (old photographic
waste site) and at suspected contamination sources in the Plant 3 area. Unit #551
had been previously investigated in 2003 with a series of soil gas samples, but no
definitive results were obtained however there were indications of contamination
found in the upper quadrant of the grid. These results were reported in the
previous semi-annual progress report for 1 September 2003 - 1 March 2004.
Fifty four total soil gas modules were installed at these sites following procedures
of the previously DSHW approved plan.
Summaries of all findings
Results of the analysis of the soil gas modules are included as an attachment to
this submittal .
2. Summaries of all changes made in the RCRA Facility Investigation during
the reporting period
As described above Passive Soil Gas survey is an additional tool that is being
tested at Solid Waste Management Units to determine if it is effective at
delineating volatile organic contamination source areas.
4. Summaries of all contact with representatives of the local community, public
interest groups or State Government during the reporting period
Correspondence regarding RFI activities has been limited to the Division of Solid
and Hazardous Waste and the Division of Water quality.
5. Summaries of all problems or potential problems encountered during the
reporting period
There were no significant problems encountered during the reporting period.
6. Actions taken to rectify problems
Thiokol continues to review all available information and pursue all avenues
to resolve any uncertainty associated with the solid waste management units.
7. Changes in personnel during the reporting period
There are no changes in personnel. The existing environmental staff will continue
to conduct the sampling when possible. Contractors will be used when
specialized equipment is required.
8. Projected work for the next reporting period
Efforts for the next reporting period will focus on receiving approval for
voluntary corrective measures, investigating additional solid waste management
units, and report preparation. The results of the soil gas work, at this time appear
to be positive in helping to delineate possible source areas. Pending additional
approval from the Utah Division of Solid and Hazardous Waste, additional sites
will be surveyed with this method. This work will specifically better define
potential contamination sources in the Plant 3 area and SWMU 551.
9. Copies of daily reports, inspection reports, laboratory and monitoring data
Results of the analysis of the soil gas modules are included as an attachment to
this submittal.
Figure 1
New Solid Waste Management Unit #677, M-721 Perchlorate Spill Area
M-721
Perchlorate Reclamation
facility.
C/D
3
N->-
Concrete Slab
Chiller Q-^ ,Tanks
36 feet